Consulta: "subject"
Registros recuperados: 2.192
Data/hora: 29/05/2024 05:28:35

Analysis on the Development Trend of Oasis Subject and Its Countermeasures
Provedor de dados: 31
Autores: Wang,   Kaiyong; Yang,   Le; Pang,   Wei; Pan,   Xudong; Zhang,   Fenghua.
The research status, development and trend of oasis subject were analyzed, and related countermeasures to develop oasis subject were put forward.
Tipo: Thesis or Dissertation
Palavras-chave: Oasis subject; Subject; Development; Construction; China; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2009
URL: http://purl.umn.edu/53602

SOME THOUGHTS ON THE FARM CREDIT SUPPLY
Provedor de dados: 31
Autores: Dowsett,   C.P.
The purpose of this paper is to consider some aspects of the problems of the farm credit supply. It is not intended to be exhaustive in its treatment of a very wide subject that has already been discussed so frequently. It is felt, however, that the recent emphasis on development (rural and other) justifies another look at the subject, especially ill relation to some modifications in the approach to farm credit and the facilities for its supply.  Sir John Crawford has said that discussion of the subject of rural credit "easily lends itself to emotion". I shall endeavour to avoid this pitfall. At the outset I would suggest that, for a subject so significant as the supply of farm credit in the Australian economy, the extent of our study of it in a detailed...
Tipo: Journal Article
Palavras-chave: Agricultural Finance.
Ano: 1964
URL: http://purl.umn.edu/22527

Peloria
Provedor de dados: 24
Autores: Linnaeus,  Carl; Rudberg,  Daniel.
Linnaean dissertation no. 3. On the subject of Scrophulariaceae. Defended December 19, 1744 by Daniel Rudberg.
Tipo: Collection
Ano: 2023

Passiflora
Provedor de dados: 24
Autores: Linnaeus,  Carl; Hallman,  Johan.
Linnaean dissertation no. 8. On the subject of Passifloraceae. Defended December 18, 1745 by Johan Hallman.
Tipo: Collection
Ano: 2023

Haemoptysi
Provedor de dados: 24
Autores: Linnaeus,  Carl; Graberg,  Johan Martin.
Linnaean dissertation no. 150. Medical essay on the subject of hemoptysis. Defended May 13, 1767 by Johan Graberg.
Tipo: Collection
Ano: 2023

Implementing Subject and Its Dynamic Mechanism in New Countryside Construction
Provedor de dados: 31
Autores: Zhang,   Desheng; Jiao,   Yunqiu.
The necessity of taking government as the implementing subject in the construction of new countryside was analyzed from the aspects such as narrowing urban-rural gap, government’s responsibility, connotation and complexity of new countryside construction. Dynamic mechanism of government in the construction of new countryside was discussed, and some problems were introduced. The basic reason of these problems was the deficiency of government’s publicity. Firstly, self-interest of government led to the deviation of public target. Secondly, government was controlled by superior groups, thus benefits of vulnerable groups can’t be ensured. On this basis, establishing an incentive and constraint mechanism for government officers was put forward. It was essential...
Tipo: Thesis or Dissertation
Palavras-chave: New countryside construction; Implementing subject; Dynamic mechanism; China; Community/Rural/Urban Development; Political Economy.
Ano: 2009
URL: http://purl.umn.edu/53755

Leistungsauftrag 2004-2007 an die Stiftung Forschungsinstitut fuer biologischen Landbau (FiBL), Frick; Thema Pflanzenbau
Provedor de dados: 21
In the area of plant production the following main subject areas are covered    - Annual Crops  - Perenniel Crops  - Plant diseases  - Pests and Beneficials
Tipo: Research Programme description
Palavras-chave: Crop husbandry.
Ano: 2023

WHAT ARE AGRICULTURAL ECONOMICS PH.D. STUDENTS LEARNING ABOUT AGRIBUSINESS RESEARCH METHODS AND SUBJECT AREAS?
Provedor de dados: 31
Autores: House,   Lisa; Sterns,   James A.
This document contains the PowerPoint presentation given by the authors at the 2002 WCC-72 meetings, regarding what agricultural economics Ph.D students are learning about agribusiness research methods and subject areas.
Tipo: Conference Paper or Presentation
Palavras-chave: Teaching/Communication/Extension/Profession; Agribusiness.
Ano: 2002
URL: http://purl.umn.edu/16618

Book review
Provedor de dados: 16
Autores: NN.
This book is entirely dedicated to the functional role of fungi in all kind of ecosystems, and it attempts to show how the world would function if fungi were not there. It is conceived as an introduction to the subject for students in mycology and ecology. The introductory chapters deal with fundamental themes, and define fungi, ecosystems and their interaction. The two following chapters deal with fungi and primary production, elucidating the way fungi make available nutrients, and the roles symbiotic and parasitic relations play with regards to plant growth and carbon fixation. Chapter 4 gives an overview of secondary productivity: fungi as food for secondary producers, and fungal-faunal interactions such as ant and termite fungus gardens, bark beetle...
Tipo: Article / Letter to the editor
Ano: 2003
URL: http://www.repository.naturalis.nl/record/531920

Subjective Experiences of Space and Time: Self, Sensation, and Phenomenal Time
Provedor de dados: 17
Autores: Ram Lakhan Pandey Vimal.
The investigation of subjective experiences (SEs) of space and time is at the core of consciousness research.  The term &amp;#x2018;space&amp;#x2019; includes the subject and objects.  The SE of subject, I-ness, is defined as &amp;#x2018;Self&amp;#x2019;.  The SEs of objects, subject&amp;#x2019;s external body, and subject&amp;#x2019;s internal states such as feelings, thoughts, and so on can be investigated using the proto-experience (PE)-SE framework.  The SE of time is defined as &amp;#x2018;phenomenal time&amp;#x2019; (which includes past, present and future) and the SE of space as &amp;#x2018;phenomenal space&amp;#x2019;. The three non-experiential materialistic models are as follows: (I) The quantum-dissipation model [25] can connect the discrete...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2008
URL: http://precedings.nature.com/documents/2272/version/1

Appendix: A Brief Review of the Literature by Subject Category; References; Epilogue
Provedor de dados: 31
Tipo: Book
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1977
URL: http://purl.umn.edu/95728

ELIMINATING ROADBLOCKS TO GREATER PRODUCTIVITY: INTRODUCTION
Provedor de dados: 31
Autores: Norwood,   Lewis F., Jr.
Sets the groundwork for discussion of the subject: eliminating roadblocks to productivity.
Tipo: Journal Article
Palavras-chave: Productivity Analysis.
Ano: 1975
URL: http://purl.umn.edu/26808

Toward an Agricultural Policy Monitoring System (APMS)
Provedor de dados: 31
Autores: De Benedictis,   Michele.
This working paper focuses on a subject of special relevance for agricultural policy reforms: the establishment of an Agricultural Policy Monitoring System.
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; Research Methods/ Statistical Methods.
Ano: 2002
URL: http://purl.umn.edu/48897

Observationes in Materiam Medicam
Provedor de dados: 24
Autores: Linnaeus,  Carl; Lindwall,  Johannes.
Linnaean dissertation no. 171. On the subject of medicinal plants. Defended June 5th, 1772 by Johan Lindwall.
Tipo: Collection
Ano: 2023

'Ämne för en dissertation'
Provedor de dados: 24
Autores: Linné, Carl von.
Suitable subject for a doctoral thesis dissertation.  Concerns insects injurious to trees common on hedges near London.  Quotes observations made by Lady Banks. Probably dates to Linnaeus fil.'s stay in London in 1781-1782.
Tipo: Collection
Ano: 2023

Who comes after the subject?
Provedor de dados: 121
Autores: Editado por Eduardo Cadava, Peter Connor y Jean-Luc Nancy.
Tipo: Text
Palavras-chave: CONCIENCIA; CONOCIMIENTO; SUJETO.
Ano: 1991
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=139878&tab=opac&oai:flacso.org.ec:139878

Algal growth on two sections of a fringing coral reef subject to different levels of eutrophication in Reunion Island
Provedor de dados: 5
Autores: Semple, S.
The temporal Variations in macroalgal coverage and biomass of two sectors of a fringing reef complex in Reunion Island, subject to different levels of nutrient enrichment, were compared over eight months. Little difference was detected in the back reef zone, but in the narrow coral strip zone the highly enriched site showed significantly higher coverage, biomass and diversity of macroalgae throughout the whole study period. Differences in the levels of nutrient enrichment of the reef waters of the two sites are implicated as potential reasons for the observed differences. The seasonal Variations of macroalgae on the reef, and aspects of several of the dominant algal species encountered are also discussed.
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20468/18140.pdf

Condition and cause in ecological interpretation
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van.
My colleague Lam, in whose honour this volume is composed, has made it very easy for contributors to find a subject in a field in which he has worked himself. His versatile interest nearly covered the whole of the taxonomy and phylogeny of vascular plants, subjects in theoretical biology, plant morphology, plant geography, and plant ecology. In the latter section his “Fragmenta papuana” contains an inspiring picture of tropical vegetation in correlation with environment. I have pleasure on this occasion in offering some considerations in the field of plant ecology. The subject which I have chosen deals with the way of reasoning when interpreting a correlation found to exist between vegetation and environment. I have not infrequently traced a deficiency in...
Tipo: Article / Letter to the editor
Ano: 1958
URL: http://www.repository.naturalis.nl/record/526314

Editorial news
Provedor de dados: 16
Autores: NN.
A Newsletter can only exist by the grace of its readers contributing items for inclusion. It is the Editor’s continual worry that he doesn’t get enough of them. So, when you read this issue, and discover that some subject important to you has been missed, please climb into your pen, ballpoint, typewriter, or PC, and let me know immediately, so that in the next issue this omission can be corrected. See your name and deeds in print! The Flora Malesiana network discussion group: to join send an e-mail to listserv@herbarium.ukm.my and include in the body (not in the subject line) the text subscribe floramalesiana Your Full Name (e.g. subscribe floramalesiana – one word! – John Smith Leiden).
Tipo: Article / Letter to the editor
Ano: 1999
URL: http://www.repository.naturalis.nl/record/533007

On a collection of Birds from Nias
Provedor de dados: 16
Autores: Büttikofer, J.
The island of Nias, the largest of the long series of islands flanking the west coast of Sumatra, and situated at a distance of about 70 miles from the north-west coast of the latter, has, of late, more than once been the subject of zoological investigations. The first intelligence about the avifauna of Nias is due to a visit, paid to that island by Baron von Rosenberg, in 1854. The results of his investigations are published in the Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen, Vol. XXX (1863) under the title: Verslag omtrent het eiland Nias en deszelfs bewoners, door J. T. Nieuwenhuisen en H. C. B. von Rosenberg. This report contains, on pp. 19 and 20, a list of 50 species of birds without any further details. Several of...
Tipo: Article / Letter to the editor
Ano: 1896
URL: http://www.repository.naturalis.nl/record/508964

Theory testing (hypothesis testing) in agricultural economics
Provedor de dados: 31
Autores: Meszaros,   Sandor.
According to Karl Popper, economics and agricultural economics should be deemed scientific if the theories (hypotheses) are subject to strict tests. The testing of agro-economic theories goes back 50 years in the USA, Canada, Europe, and Japan, and these methods are becoming increasingly part of educational research methodology. In fact, the author of this paper teaches this very subject at Debrecen University, and for this reason has endeavoured to provide an overview on current trends in this field. The present overview first discusses the role of testing in the research process (cognition), and then analyses the various classification methods (types) of testing. It deals in detail with the application of the (microeconomic) production-theory in...
Tipo: Journal Article
Palavras-chave: Theory testing; Hypotheses testing; Economics; Agricultural economics; Production-theory; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/46658

Construction of the Legal System of Forestry Carbon Sequestration Transaction in China
Provedor de dados: 31
Autores: Zou,   Limei; Wang,   Yuexian.
Legal nature of forestry carbon sequestration transaction in China is introduced. Forestry carbon sequestration transaction is a kind of formal, bilateral, consensual and compensatory legal behavior following the principle of autonomy and having the nature of contract. Legal regulation of forestry carbon sequestration transaction is necessary for making and using demonstration text of contract, distributing the subject right and responsibility of forestry carbon sequestration transaction, offering references for environmental protection and other fields, and developing the voluntary market of forestry carbon sequestration. Based on this, construction of legal system of forestry carbon sequestration transaction is discussed from nine aspects, such as...
Tipo: Thesis or Dissertation
Palavras-chave: Forestry carbon sequestration; Transaction; Legal system; Industrial Organization.
Ano: 2009
URL: http://purl.umn.edu/58484

Factors affecting product innovations: A literature review
Provedor de dados: 31
Autores: Chryssochoidis,   George M.
Product and process innovations are prime manifestations of innovativeness by an organization. Yet surprisingly little is known regarding how to initiate and maintain the innovative momentum in organizations with the ultimate target to produce an increasing number of product innovations and improve competitiveness. Of major concern has been however, the sheer volume of contributions on the subject and the complexity of issues involved. An extensive literature review has been carried out covering 400 scientific Journals during a 10-year long period (1991-2001). Over 2500 journal articles have been identified as relevant and read. Their contribution to the subject of product innovations (i.e., process innovations are not covered) has been identified using a...
Tipo: Journal Article
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/26420

Difficulties and Countermeasures of Developing Irrigation and Water Conservancy in New Era
Provedor de dados: 31
Autores: Qiao,   Na.
This paper expounds the great significance of irrigation and water conservancy for the agricultural development. Vigorously developing irrigation and water conservancy can promote high yield and stable yield of grain, effectively increase farmers' income, alleviate the impact of drought on agricultural production, be conducive to the adjustment of agricultural production structure, and promote county economic development. The difficulties of developing irrigation and water conservancy in new era are analyzed as follows: the subject of liabilities defaults seriously: it lacks effective input security system; the quality of project degenerates badly; the agricultural technological development is slow Corresponding policy suggestions are put forward as...
Tipo: Journal Article
Palavras-chave: Irrigation and water conservancy; Difficulties; Agricultural development; Countermeasures; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/118290

The Future of Environmental Compliance Incentives in U.S. Agriculture:  The Role of Commodity, Conservation, and Crop Insurance Programs
Provedor de dados: 31
Autores: Claassen,   Roger.
In recent years, direct payments—a type of farm commodity program payment—have made up a large share of Federal agriculture assistance that could be withheld from farmers who fail to comply with highly erodible land conservation (conservation compliance and sodbuster) or wetland conservation (swampbuster) provisions, known collectively as environmental compliance requirements. If direct payments are sharply reduced or eliminated to help reduce the Federal budget defi cit, compliance incentives would be reduced on many farms, potentially increasing environmental quality problems. Some farmers will still be subject to compliance through existing Federal agricultural programs(e.g., conservation or disaster programs) or programs that may succeed direct...
Tipo: Technical Report
Palavras-chave: Direct payment; Crop insurance; Conservation compliance; Sodbuster; Swampbuster; Environmental Economics and Policy; Land Economics/Use.
Ano: 2012
URL: http://purl.umn.edu/121803

Federal Tax Policies and Farm Households
Provedor de dados: 31
Autores: Durst,   Ron L.
Significant changes in Federal individual income and estate tax policies have occurred over the last 10 years. Analysis suggests that changes in Federal tax provisions affecting both individual and business income taxes have reduced average tax rates for all farm households, resulting in the lowest tax burden on farm income and investment in a decade. Similarly, an analysis of the changes to Federal estate tax policies suggests that increases in the value of property that can be transferred to the next generation free of the estate tax, combined with special provisions for farmers and other small businesses, have greatly reduced the number of farm estates subject to the tax and the amount owed. While nearly 10 percent of commercial farm estates could owe...
Tipo: Report
Palavras-chave: Income tax; Estate tax; Tax rates; Estate; Federal tax policy; Farm losses; Commercial farms; Farm Management.
Ano: 2009
URL: http://purl.umn.edu/58619

Study on the Influence of Yi Family Branch System on the Construction of New Countryside in Liangshan
Provedor de dados: 31
Autores: Song,   Jingtong.
Legal nature of forestry carbon sequestration transaction in China is introduced. Forestry carbon sequestration transaction is a kind of formal, bilateral, consensual and compensatory legal behavior following the principle of autonomy and having the nature of contract. Legal regulation of forestry carbon sequestration transaction is necessary for making and using demonstration text of contract, distributing the subject right and responsibility of forestry carbon sequestration transaction, offering references for environmental protection and other fields, and developing the voluntary market of forestry carbon sequestration. Based on this, construction of legal system of forestry carbon sequestration transaction is discussed from nine aspects, such as...
Tipo: Thesis or Dissertation
Palavras-chave: Forestry carbon sequestration; Transaction; Legal system; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/58481

Renegotiation Without Holdup: Anticipating Spending and Infrastructure Concessions
Provedor de dados: 31
Autores: Engel,   Eduardo M.R.A.; Fischer,   Ronald; Galetovic,   Alexander.
Infrastructure concessions are frequently renegotiated after investments are sunk, resulting in better contractual terms for the franchise holders. This paper offers a political economy explanation for renegotiations that occur with no apparent holdup. We argue that they are used by political incumbents to anticipate infrastructure spending and thereby increase the probability of winning an upcoming election. Contract renegotiations allow administrations to replicate the effects of issuing debt. Yet debt issues are incorporated in the budget, must be approved by Congress and are therefore subject to the opposition's review. By contrast, under current accounting standards the obligations created by renegotiations circumvent the budgetary process in most...
Tipo: Working or Discussion Paper
Palavras-chave: Public Economics.
Ano: 2006
URL: http://purl.umn.edu/28382

Forecasting in the Presence of Level Shifts
Provedor de dados: 31
Autores: Smith,   Aaron D.
This article addresses the problem of forecasting time series that are subject to level shifts. Processes with level shifts possess a nonlinear dependence structure. Using the stochastic permanent breaks (STOPBREAK) model, I model this nonlinearity in a direct and flexible way that avoids imposing a discrete regime structure. I apply this model to the rate of price inflation in the United States, which I show is subject to level shifts. These shifts significantly affect the accuracy of out-of-sample forecasts, causing models that assume covariance stationarity to be substantially biased. Models that do not assume covariance stationarity, such as the random walk, are unbiased but lack precision in periods without shifts. I show that the  STOPBREAK model...
Tipo: Working or Discussion Paper
Palavras-chave: Financial Economics; Research Methods/ Statistical Methods.
Ano: 2004
URL: http://purl.umn.edu/11985

Subsidy Incidence in Agricultural Land Markets: An Experimental Investigation
Provedor de dados: 31
Autores: Nagler,   Amy M.; Menkhaus,   Dale J.; Bastian,   Christopher T.; Ehmke,   Mariah D.
We use laboratory market experiments to control for market power and social norms in order to evaluate market outcomes associated with subsidy incidence. We estimate the incidence of a stylized agricultural subsidy in laboratory land rental negotiations and compare the market behavior of university students to agricultural professionals. In separate sessions with both subject groups, 21.5 percent of a per-unit subsidy paid to the buyer (tenant) was passed on to sellers (landlords). The consistent treatment effect between students and professionals is encouraging, particularly in the use of experimental laboratory methods for ex ante analyses of agricultural policy impacts.
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural subsidies; Ex ante policy analysis; Laboratory market experiments; Land market; Professional versus student subject pools; Subsidy incidence; Agricultural and Food Policy; Institutional and Behavioral Economics; Q1; Q18; C92.
Ano: 2011
URL: http://purl.umn.edu/103032

Regulation of Pax7 protein levels by caspase-3 and proteasome activity in differentiating myoblasts
Provedor de dados: 48
Autores: Olguín,Hugo C.
The transcription factor Pax7 negatively regulates the activity of the muscle regulatory transcription factor MyoD, preventing muscle precursor cells from undergoing terminal differentiation. In this context, the ratio between Pax7 and MyoD protein levels is thought to be critical in allowing myogenesis to proceed or to maintain the undifferentiated muscle precursor state. We have previously shown that Pax7 is subject to rapid down regulation in differentiating myoblasts, via a proteasome-dependent pathway. Here we present evidence indicating that Pax7 is also subject to caspase-3-dependent regulation. Furthermore, simultaneous inhibition of caspase-3 and proteasome activity induced further accumulation of Pax7 protein in differentiating myoblasts. These...
Tipo: Journal article
Palavras-chave: Pax7; Caspase-3; Calpains; Proteasome; Satellite cells; Muscle differentiation.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000400002

THE IMPORTANCE OF PRODUCER ORGANIZATIONS IN ORGANIC FARMING
Provedor de dados: 21
Autores: SAYGILI, SEVİNÇ.
Cooperatives, associations and trade body shall be supposed as producer organizations types in our country. Producer organizations in our country operate under the framework of regulations that they are subject to. Producer organizations have economic, cultural and social benefits.
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general.
Ano: 2014
URL: http://orgprints.org/23889/7/23889.pdf

Mata Matters: Macros
Provedor de dados: 31
Autores: Gould,   William.
Mata is Stata’s matrix language. In the Mata Matters column, we show how Mata can be used interactively to solve problems and as a programming language to add new features to Stata. Macros are the subject of this column.
Tipo: Article
Palavras-chave: Mata; Macros; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/122602

F.R. TOMLINSON: MENS EN WETENSKAPLIKE
Provedor de dados: 31
Autores: Smith,   Dirk Jacobus Gysbert.
The 1996 F.R. Tomlinson Memorial Lecture was delivered on 23rd May 1996 in Bloemfontein. The author, Prof D.J.G. Smith, chose the subject : F.R. Tomlinson: Man and Scientist
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1997
URL: http://purl.umn.edu/54981

Mata Matters: Structures
Provedor de dados: 31
Autores: Gould,   William.
Mata is Stata’s matrix language. In the Mata Matters column, we show how Mata can be used interactively to solve problems and as a programming language to add new features to Stata. Structures are the subject of this column. Structures are an advanced programming technique that can greatly simplify complicated code.
Tipo: Article
Palavras-chave: Mata; Structures; Struct; Research Methods/ Statistical Methods.
Ano: 2007
URL: http://purl.umn.edu/119294

WHAT DIRECTORS AND MANAGERS SHOULD KNOW ABOUT FINANCIAL AUDITS
Provedor de dados: 31
Autores: Meier,   Harvey A.
The paper provides information on the function and scope of financial audits and auditors.  Subject matters covered are: auditor selection, characteristics of outside auditors, comprehensiveness of audit report and review process of a final audit.
Tipo: Journal Article
Palavras-chave: Financial Economics.
Ano: 1980
URL: http://purl.umn.edu/27315

PLANNING NEW FACILITIES FOR MAXIMUM PRODUCTIVITY IN SERVICING CONVENIENCE STORES
Provedor de dados: 31
Autores: Wright,   Barry W.
Examines the question of warehousing merchandise that Wawa sells in its stores and presents the results of an in-depth study on this subject.
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1976
URL: http://purl.umn.edu/27354

Introductory lectures to 'Diaeta naturalis'
Provedor de dados: 24
Autores: Linné, Carl von.
Three sets of introductory lectures, on the subject of 'Diaeta naturalis'. pp. 1-4: in Swedish pp. 5-6: in Latin. The paper's watermark (VKM Pro Patria) corresponds to other manuscripts of Linnaeus's which date to the 1760s. pp. 7-8: in Latin, entitled 'Praelectio 2da'.
Tipo: Collection
Ano: 2023

Purple urine bag syndrome in an elderly subject
Provedor de dados: 55
Autores: Bocrie,Olivier-Jacques; Bouchoir,Elodie; Camus,Agnès; Popitean,Laura; Manckoundia,Patrick.
Tipo: Info:eu-repo/semantics/article
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000600018

Politics of piety the islamic revival and the feminist subject
Provedor de dados: 121
Autores: Saba Mahmood; Mahmood, Saba.
Tipo: Text
Palavras-chave: FEMINISMO; MUJERES MUSULMANAS; EGIPTO; VIDA RELIGIOSA; CASOS DE ESTUDIO; ISLAM.
Ano: 2005
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=112442&tab=opac&oai:flacso.org.ec:112442

Anthropology and social theory culture, power, and the acting subject
Provedor de dados: 121
Autores: Sherry B. Ortner.; Ortner, Sherry B.
Tipo: Text
Palavras-chave: CIENCIAS SOCIALES.
Ano: 2006
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=108224&tab=opac&oai:flacso.org.ec:108224

Narrative framing of the (heroic and rebellious) actors in the struggle for organic food and farming
Provedor de dados: 21
Autores: Mikkola, Minna.
Implications   This paper appreciates the well-known and insightful Dutch construct of transition management as a successful meta-theory for socio-economic and environmental change. However, the change, as a very complex phenomenon, could also be analyzed as rich, extensive and intensive as well as more unstable and open-ended change process. Therefore, the paper proposes that research and innovation projects could benefit from the narrative model particularly when the work is carried out by multiple actors, some of who are researchers and some practitioners. The paper proposes the narrative model (Greimas, 1966) as a valid meta-theory which links actors’ roles, positions, devices and contradictory aims into the story line which makes the wonder of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Community development; Food systems.
Ano: 2017
URL: http://orgprints.org/31442/1/170602MikkolaTheoreticalFraming.docx

Wine tax reform: The impact of introducing a volumetric excise tax for wine
Provedor de dados: 31
Autores: Fogarty,   James Joseph; Jakeman,   Guy.
In addition to the GST, alcohol sold in Australia is subject to excise tax. Although both beer and spirits are subject to a volumetric excise tax, wine is subject to an additional value added tax known as the Wine Equalisation Tax (WET). The recent Henry tax review recommended substantial changes to Australian alcohol taxation policy. Here, the implications for the wine industry of the Henry tax review recommendations are explored using a computable general equilibrium model. The results show that: (i) replacement of the WET with a revenue neutral volumetric excise tax would have a small negative impact on the wine industry; (ii) removal of the WET rebate would have a substantial negative impact on small wineries; and (iii) applying a uniform alcohol tax...
Tipo: Working or Discussion Paper
Palavras-chave: Wine; Alcohol taxation; General equilibrium modelling; Demand and Price Analysis; Health Economics and Policy; R13; H23.
Ano: 2011
URL: http://purl.umn.edu/108667

From the colonialist to the “autobotanical” approach: the evolution of the subject-object relationship in ethnobotanical research
Provedor de dados: 39
Autores: Baldauf,Cristina.
ABSTRACT This article explores the evolution of the subject-object relationship in ethnobotanical research. Discussion of the main tendencies of each time period revealed a great distance between subject and object during the beginning of ethnobotany, which decreased in subsequent phases, and only became absent in some contemporary works. Furthermore, paradigmatic transitions in ethnobotany were found to be incomplete and multiple paradigms were found to coexist simultaneously in present time, despite important epistemological ruptures. Analysis of presentations at the last Congress of the International Society of Ethnobiology revealed not only an expressive participation of traditional communities, but also a considerable amount of work based on the...
Palavras-chave: Contemporary ethnobotany; Ethnobiology 5; Local knowledge; Traditional knowledge; Traditional populations.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000200386

Eucalyptus grandis Hill ex Maiden inoculated with Pisolithus microcarpus (UFSC-Pt116) in land subject to the sandy process in southern Brazil
Provedor de dados: 58
Autores: Souza,Eduardo Lorensi de; Antoniolli,Zaida Inês; Machado,Rafael Goulart; Eckhardt,Daniel Pazzini; Dahmer,Sabrina de Fátima Barbosa.
Eucalypts is one of the main species used for commercial reforestation in the state of Rio Grande do Sul, Brazil. This study aimed to evaluate the survival and early growth of eucalyptus trees in an area subject to sandy process after three years of growth. The Eucalyptus grandis seedlings were grown in a greenhouse, innoculated or not with the isolated ectomycorrhizal Pisolithus microcarpus (UFSC-Pt116), produced in peat or Entisol. After 120 days, the seedlings were transplanted to an area subject to the sandy process, in the city of São Francisco de Assis, RS. The plants have been evaluated regarding survival, height, stem diameter, nitrogen, phosphorus and potassium levels and total phosphorus, inorganic phosphorus, organic phosphorus and wood...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ectomycorrhiza; Degraded areas; Entisol; Inoculation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400004

Cómo El Sujeto se hizo objeto de las Ciencias Sociales (Tema Central)
Provedor de dados: 122
Autores: Sánchez-Parga, José.
Las ciencias sociales (sociología, política, economía…) por su propia epistemología han tratado siempre los hechos sociales en su máxima objetividad (“como si fueran cosas”, decía Durkheim); sin embargo desde hace tres décadas el espectro del sujeto (filosófico, cartesiano o psicoanalítico y lacaniano) “ronda la academia occidental” (Zizek) y merodea las ciencias sociales. De hecho, aparte de la antropología, las ciencias sociales no poseen una concepción teórica propia del sujeto, que permita una perspectiva biográfica coherente (M. Finger, 1989: 242). El Sujeto, la subjetividad, los sentimientos y estados de conciencia, las mismas patologías psíquicas han comenzado a ser tratados como hechos sociales y manifestados en el espacio público, asociados a...
Tipo: Artículo
Palavras-chave: SUJETO SOCIAL; CIENCIAS SOCIALES; ESPACIO PÚBLICO; SOCIOLOGÍA DEL SUJETO; ANTROPOLOGÍA DEL SUJETO; SUBJECT SOCIAL; SOCIAL SCIENCES; PUBLIC SPACE; SOCIOLOGY SUBJECT; ANTHROPOLOGY OF SUBJECT; SUBJETIVIDAD; SUBJECTIVITY.
Ano: 2012
URL: http://hdl.handle.net/10469/4525

Cómo El Sujeto se hizo objeto de las Ciencias Sociales (Tema Central)
Provedor de dados: 122
Autores: Sánchez-Parga, José.
Las ciencias sociales (sociología, política, economía…) por su propia epistemología han tratado siempre los hechos sociales en su máxima objetividad (“como si fueran cosas”, decía Durkheim); sin embargo desde hace tres décadas el espectro del sujeto (filosófico, cartesiano o psicoanalítico y lacaniano) “ronda la academia occidental” (Zizek) y merodea las ciencias sociales. De hecho, aparte de la antropología, las ciencias sociales no poseen una concepción teórica propia del sujeto, que permita una perspectiva biográfica coherente (M. Finger, 1989: 242). El Sujeto, la subjetividad, los sentimientos y estados de conciencia, las mismas patologías psíquicas han comenzado a ser tratados como hechos sociales y manifestados en el espacio público, asociados a...
Tipo: Artículo
Palavras-chave: SUJETO SOCIAL; CIENCIAS SOCIALES; ESPACIO PÚBLICO; SOCIOLOGÍA DEL SUJETO; ANTROPOLOGÍA DEL SUJETO; SUBJECT SOCIAL; SOCIAL SCIENCES; PUBLIC SPACE; SOCIOLOGY SUBJECT; ANTHROPOLOGY OF SUBJECT; SUBJETIVIDAD; SUBJECTIVITY.
Ano: 2012
URL: http://hdl.handle.net/10469/4525

Use of techniques to increase flexibility and equilibrium in adolescents with cerebral palsy: report of three case studies
Provedor de dados: 3
Autores: Ferrarezi, Katia Carpetieri; UEL; Guedes, Joana Elizabeth Ribeiro Pinto; UEL.
The aim of this paper is to describe the tests and pediatric treatment of motor-independent spastic cerebral palsy to increase lower-limbs flexibility and equilibrium time. Three subjects were selected for the experiment: a twelve-year-old boy with spastic diplegia, a thirteen-year-old boy with right spastic hemiplegia and a ten-year-old girl with left spastic hemiplegia. The evaluation methodology consisted of sit-and-reach test, goniometry and equilibrium test. The treatment procedure consisted of two weekly individual 30-minute sessions covering a period of 16 weeks. Proprioceptive neuromuscular facilitation method was used to increase lower-limbs flexibility and miniboard jumping was used to stimulate proprioceptive and vestibular equilibrium. The...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas paralisia celebral; Fisioterapia; Facilitação neuromuscular proprioceptiva; Mini-trampolim 2.00.00.00-6 Ciências Biológicas.
Ano: 2000
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/3095

U.S. Environmental Programs and Green Box Provisions under the WTO Agreement on Agriculture
Provedor de dados: 31
Autores: Blandford,   David.
This paper focuses on the compatibility of U.S. agri-environmental programs with the Green Box provisions of the Uruguay Round Agreement on Agriculture (AoA). If a new WTO agreement is concluded under the current Doha round of negotiations, it is likely that the amount of payments that can be provided to farmers under the Amber and Blue box categories will be reduced. As a result, greater attention will be directed to the use of the Green Box, which is unlikely to be subject to such a requirement.  Payments under the Green Box are supposed to generate no or minimal distortions in production or trade. Those made under environmental programs are restricted to providing compensation for the additional costs incurred or income foregone in meeting program...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics and Policy; International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/14598

A Review of Scientific Papers About Head and Neck Cancers
Provedor de dados: 52
Autores: Paoli,Severo de; Fonseca,Adenilson de Souza da; Paoli,Flávia de; Geller,Mauro; Presta,Giuseppe Antonio; Santos-Filho,Sebastião David; Bernardo-Filho,Mário.
Head and neck cancer is one of the 10 most frequent cancers worldwide, with an estimated 500000 new cases diagnosed annually. Treatment of head and neck cancers require a multidisciplinary approach due their complexity and the functional and esthetic alterations that cancer can cause. The interest of the scientific community in a specific subject can be evaluated by analyzing of the number and the quality of published papers on the topic. The information obtained from PubMed (www.ncbi.nlm.nih.gov/sites/entrez) has been used as a tool in various publications to aid the evaluation of the scientific interest in specific research areas The aim of this work is to evaluate, using PubMed, the scientific interest in studies of head and neck cancer treatments such...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scientific interest; PubMed; Cancer; Surgery; Radiotherapy; Chemotherapy.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000700011

Lack of Agreement on Fragmentation Metrics Blurs Correspondence between Fragmentation Experiments and Predicted Effects
Provedor de dados: 7
Autores: Bogaert, Jan; University of Antwerp; jan.bogaert@ua.ac.be.
The direct correspondence between landscape fragmentation and its effects is still the subject of debate. Many widely accepted hypotheses are not supported by experiments. The issue of fragmentation measurement is addressed here. To predict the effects of fragmentation, it is essential to quantify the pattern of fragmentation. Despite the increased use of spatial analysis and available measures, experts have not yet reached an agreement on how to measure patterns of fragmented landscapes and, thus, unambiguous translation of experimental findings into conservation or management guidelines is hampered.
Tipo: Peer-Reviewed Reports
Palavras-chave: Fragmentation; Landscape metric; Spatial pattern.
Ano: 2003

Nuevos registros de poblaciones amenazadas de Pilgerodendron uviferum D.Don (Florin) en su límite norte en la Cordillera de la Costa chilena
Provedor de dados: 73
Autores: Soto,Daniel P; Bannister,Jan R; Ríos,Andrea I; Le Quesne,Carlos.
We describe twelve previously undocumented Pigerodendron uviferum D.Don (Florin) populations outside of protected areas at the northern limit of the Chilean Coast Range (from 39º43'-40º S), extending their northern limits. These small swamp-populations are isolated within a matrix of pastures and exotic forest plantations, and are subject to “chronic” anthropogenic disturbances.
Tipo: Journal article
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432010000100010

Tutorial para análise funcional a partir de estudos de associação genômica ampla e transcriptômicos utilizando o banco de dados MeSH (Medical Subject Headings) no programa R.
Provedor de dados: 14
Autores: SOLLERO, B. P.; GRYNBERG, P.
Acessando recursos de anotações; MeSH
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Associação genômica ampla; Transcriptoma; Programa de Computador; Genótipo.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125820

The Norwegian North-Atlantic Expeditions 1876-1878. Volume 1. Chemistry
Provedor de dados: 5
Autores: Tornoe, Hercules.
Experiments harve long since been instituted, from time to time , by divers chemists, with the object of investigating the absorption of atmospheric air by the fiuids with which in the course of nature it comes in contact ; but not till of late years has this phenomenon been made the subject of exhaustive treatment in its relation tu ocean water. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Chemistry; Oceanographical campaign; Expedition; History; Chimie; Campagne océanographique; Voyage; Histoire.
Ano: 1880
URL: http://archimer.ifremer.fr/doc/1880/publication-6928.pdf

By-products from Fish Processing: Focus on French Industry
Provedor de dados: 5
Autores: Penven, Anais; Perez-galvez, Raul; Berge, Jean-pascal.
Biotechnology advances for marine by-products conversion into products of interest are numerous. In order to give maximum elements of understanding, it is essential to define the framework of this research to understand why and how bioconversion technologies are applicable. It is essential to look beyond the technical and technological advances on the subject and so to take into account the economic, social, political and environmental parameters, which govern all forms of approaches for fish by-products upgrading.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25916/23949.pdf

Distraction Osteogenesis in Dentistry
Provedor de dados: 77
Autores: Fernandes,Flávio Henrique Carriço N; Orsi,Iara Augusta; Bezzon,Osvaldo Luiz.
Distraction osteogenesis is a technique for induction of new bone formation between two segments of a bone that presents wide possibilities of use in Dentistry. However, the available information on this subject is still scarce. The aim of this article is to review the literature related to bone formation, mechanically induced by distraction osteogenesis, in order to supply subsidies the agreement of this process.
Tipo: Journal article
Palavras-chave: Distraction osteogenesis; Bony formation; Dentistry.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300013

Erythropoiesis and Erythrophagocytosis in Bovine Haemal Nodes
Provedor de dados: 77
Autores: Cerutti,P; Guerrero,F.
Whether bovine haemal nodes are involved in turnover of red blood cells has been a subject of some controversy In this study, fluorescent and conventional optical microscopy of conventionally or immunohistochemically stained node sections, together with transmission electrón microscopy, showed the presence of erythrocyte precursors and megakaryocytes, and evidence of active involvement in the destruction and replacement of oíd or degenerate red cells and the platelets.
Tipo: Journal article
Palavras-chave: Haemal nodes; Erithropoiesis; Erithrophagocytosis.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300008

XLVI Congress of the Brazilian Society of Tropical Medicine Foz do Iguaçu, Paraná State, Brazil - March 14th to 18th, 2010 central subject - environmental changes and Tropical diseases: challenges of the millennium
Provedor de dados: 80
Autores: Telles Filho,Flavio de Queiroz.
Tipo: Info:eu-repo/semantics/other
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000400001

Bird-marking in the Netherlands. II. Recovery of marked Birds
Provedor de dados: 16
Autores: Oort, E.D. van.
In addition to my first paper on this subject on page 55 of the present volume, I give here an enumeration of recoveries of birds, marked on account of the Leyden Museum in 1911 as well as in 1912. The number of the birds marked in 1912 is considerably surpassing that of them marked in 1911. I cannot give now the exact number of marked birds nor a complete list of the species, as many of our cooperators did not yet sent to me the filled-in schedules.
Tipo: Article / Letter to the editor
Ano: 1912
URL: http://www.repository.naturalis.nl/record/509058

A revision of Caltha (Ranunculaceae)
Provedor de dados: 16
Autores: Smit, Petra G.
The family of the Ranunculaceae, although a large one (ca. 1200 species) occurring almost throughout the world, is generally regarded as a very natural one. The only genera with a recently more or less disputed position are Circaeaster, Glaucidium, Hydrastis, Kingdonia, and Paeonia. The others may at present all be considered to be ‘true’ Ranunculaceae. Various botanists have studied the delimitation of these genera, their affinity and phylogenetic links. Their ideas are often widely divergent. There is no need to go into the subject here, but some opinions on the place in the system of Caltha may be reviewed.
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/525917

Scyllarides obtusus spec. nov., the scyllarid lobster of Saint Helena, Central South Atlantic (Crustacea: Decapoda Reptantia: Scyllaridae)
Provedor de dados: 16
Autores: Holthuis, L.B.
A new species of slipper lobster is described from Saint Helena, where the species seems to be endemic. Known under the vernacular name Stump, the species forms the subject of a local fishery, carried out since early times. Previously the species has been identified with various Scyllarides species from the Atlantic and East Africa.
Tipo: Article / Letter to the editor
Palavras-chave: Scyllaridae; Scyllarides obtusus spec. nov.; Saint Helena; Slipper lobsters; Stump; Fishery; 42.74.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/319105

Some remarks on the systematical value of the male hypopygium in Fungivoridae
Provedor de dados: 16
Autores: Barendrecht, G.
In spite of the many discussions on this subject, both in literature and meetings of entomological societies, a considerable controversy exists between those entomologists who, for determination, readily resort to a comparison of the hypopygia, this being too often the only part of the insect offering satisfactory species characters, and those who consider this practice beneath the dignity of scientific entomology. As it happened that the writer in the course of several years had to do much work on Fungivoridae, he had ample opportunity to become familiar with this problem.
Tipo: Article / Letter to the editor
Ano: 1939
URL: http://www.repository.naturalis.nl/record/503918

Amphibians in Western Asturia
Provedor de dados: 16
Autores: Veenstra, Geert.
In the spring of 1980, from the end of March till in July, I visited the eastern part of the Spanish province of Oviedo and the adjacent part of the province of Leon. The main subject of investigation during this period was the species Rana temporaria (Veenstra 1981). I tried to find out where this species could be found and while doing so I determined the occurrence of more species of amphibians. Totally twelve species of amphibians could be observed. Characteristics of their reproduction sites are listed and worked out below.
Tipo: Article / Letter to the editor
Ano: 1982
URL: http://www.repository.naturalis.nl/record/506380

Books received by the Rijksherbarium library
Provedor de dados: 16
Autores: NN.
The eleventh issue of this series gives 26 sheets with coloured and/or black-and-white photographs of 11 unidentified and 16 identified species of Ectomycorrhizae. The morphology is extensively described. Several keys are given for the identification of ectomycorrhiza with respect to the tree genera Abies, Alnus, Betula, Carpinus, Corylus, Cyclobalanopsis, Elaeocarpus, Eucalyptus, Fagus, Larix, Nothofagus, Pasania, Picea, Pinus, Populus, Pseudotsuga, Quercus, Salix, Shorea, Tetraberlinia, and Tsuga. Again, this issue adds a lot of very useful information on the subject, and is of great value for ectomycorrhizal research.
Tipo: Article / Letter to the editor
Ano: 2001
URL: http://www.repository.naturalis.nl/record/531728

Avian biogeography on western Indian Ocean islands: eustatic sea levels, geological events and anthropogenic changes
Provedor de dados: 16
Autores: Hume, J.P.
The south-western Indian Ocean islands, excluding the microcontinent of Madagascar, are geologically complex and diverse. They have been subject to drastic sea level changes, volcanic events and anthropogenic changes, all of which have contributed to confuse understanding of their avian biogeography. An array of factors have affected these avifaunas, based on palaeontological, historical and molecular evidence,which together have shown that avian biogeography is not congruent with the relative age and size of the islands.
Tipo: Article / Letter to the editor
Palavras-chave: Aves; Biogeography; Indian Ocean; Palaeoecology; Geology; 42.83; 42.65.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/428484

Miscellaneous information
Provedor de dados: 16
Autores: NN.
The limestone flora of Malaya. Under this title, Mr. S. C. Chin submitted a M.Sc. thesis in typescript in March 1973 at the University of Malaya, Kuala Lumpur. Supervisor was Dr. B.C. Stone. Hitherto, Henderson’s work of 1939 was the only study on the subject, with 745 spp. in all, about 195 of them known only from limestone, 130 of them endemics. Since exploration started in 1880, sixty collectors (listed) have gathered
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/533201

In Memoriam Dr. M. Jacobs
Provedor de dados: 16
Autores: Kalkman, C.
Dr. Marius Jacobs, a senior staff member of the Rijksherbarium, died suddenly on 28 April 1983, following a heart attack some days earlier. He was only 53 years old and his death came as a great shock, not only to his colleagues at our institute. Jacobs was a many-sided man with interests in many fields. In each of these he held definite opinions which were based on a thorough knowledge of the subject. So he could not easily be shaken from his views when it came to a discussion.
Tipo: Article / Letter to the editor
Ano: 1983
URL: http://www.repository.naturalis.nl/record/525586

The Blattidae of Surinam
Provedor de dados: 16
Autores: Bruijning, C.F.A.
In the earliest papers on neotropical Blattidae a fair number of specimens from Surinam were recorded (LINNAEUS, DE GEER ¹), DE SAUSSURE, BRUNNER). But in the period from the beginning of this century up to now only a few scattered reports of Blattidae from that region have appeared in the literature of the subject. The present article will be the first to deal exclusively with Surinam species. The material dealt with in this paper was mainly secured by DR. D. C. GEIJSKES between 1938 and 1955. His extensive travels both in the coastal area and far into the interior of Surinam enabled him to collect all over the country.
Tipo: Article / Letter to the editor
Ano: 1959
URL: http://www.repository.naturalis.nl/record/506295

Petricola pholadiformis Lam. on the Dutch Coast
Provedor de dados: 16
Autores: Vernhout, J.H.
Since I published my paper on this subject (Notes Leyden Museum, Vol. XXXIV, 1912, p. 240), the following localities of our coast where this American mollusc also has been collected, have come to my knowledge: Vlissingen, isle of Walcheren; south-east of Domburg (see sketch of the coast of the Netherlands in the cited paper). Eastern-Schelde, between Ierseke and Tholen. Zandvoort, between Noordwijk and Petten. Terschelling, the island next to Vlieland in nord-east direction. Leiden Museum, Jan. 7, 1915.
Tipo: Article / Letter to the editor
Palavras-chave: 42.73.
Ano: 1915
URL: http://www.repository.naturalis.nl/record/319174

The vessels in the wood of Javan Mangrove trees
Provedor de dados: 16
Autores: Janssonius, H.H.
In the course of my study on the wood-anatomy of Javan woods (Mikrographie des Holzes der auf Java vorkommenden Baumarten), I examined also many woods from mangrove-trees. Mangrove has been the subject of much investigation; the community is usually described as xeromorphic. Mangrove woods proved to be different from woods belonging to species growing in other stations even if those species belonged to the same family or even genus. The data may be traced in my “Mikrographie” but it seems more convenient to review them here.
Tipo: Article / Letter to the editor
Ano: 1950
URL: http://www.repository.naturalis.nl/record/524714

A note on Valeriana jatamansi Jones (Caprifoliaceae s.l.)
Provedor de dados: 16
Autores: Mabberley, D.J.; Noltie, H.J.
The tangled arguments around the names of jatamansi drug plants are examined and the correct synonymies and typifications for Nardostachys jatamansi (D.Don) DC. and V. jatamansi Jones (both Caprifoliaceae s.l.) are provided. The conservation status of the former, and the need for further work on the subject, is briefly discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Conservation; Jatamansi; Nardostachys jatamansi; Typification; Valeriana jatamansi.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/525842

From the editors
Provedor de dados: 16
Autores: NN.
At the Flora Malesiana Symposium IV held in Malaysia, an electronic network discussion group for Flora Malesiana was set up by Dr. Kamarudin Mat-Salleh of the University of Kebangsaan Malaysia: floramalesiana@herbarium.ukm.my If you would like to subscribe, all you need to do is to send an e-mail addressed to listserver@herbarium.ukm.my and include in the body of your message (not in the subject line): subscribe floramalesiana YourFullName (e.g. subscribe floramalesiana Odoardo Beccari)
Tipo: Article / Letter to the editor
Ano: 1998
URL: http://www.repository.naturalis.nl/record/533386

Further observations on fossil and subfossil Odobenid material (Mammalia, Carnivora) from the North Sea
Provedor de dados: 16
Autores: Bosscha Erdbrink, D.P.; Bree, P.J.H. van.
Six cranial and two postcranial fossil and subfossil odobenid remains that have come to our notice since our 1986 paper on the same subject are described and discussed. One of these can, with some confidence, be identified as Odobenus antverpiensis (Rutten, 1907). The others either belong to the recent species, Odobenus rosmarus (Linnaeus, 1758), or should simply be identified as Odobenus species. Some remarks are made on the morphological differences between antverpiensis (perhaps identical with huxleyi) and rosmarus.
Tipo: Article / Letter to the editor
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504860

Early Phanerozoic trace fossils from the Sierra Albarrana quartzites (Ossa-Morena Zone, Southwest Spain)
Provedor de dados: 16
Autores: Marcos, A.; Azor, A.; González, F.; Simancas, F.
Three ichnogenera are described from a 50 to 500 m thick shallow-water sandstone-shale sequence (Sierra Albarrana Quartzites). The ichnofauna consists of the burrows of worm-like animals (Arenicolites, Monocraterion, and Skolithos). The age of this formation, previously considered to be Precambrian or Palaeozoic, has been the subject of discussions. We may now assign it an Early Phanerozoic age, in agreement with the known stratigraphic distribution of the ichnofossils found.
Tipo: Article / Letter to the editor
Palavras-chave: 38.20.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/317447

15. Mammalia
Provedor de dados: 16
Autores: Maarel, F.H. van der.
In connection with the particular nature of the present subject not only those publications have been used, which deal with the original type specimens or which mention the discovery from another locality, but also every publication in which new remains of the species have been described ¹). In general no use has been made of preliminary notes. An exception had to be made for those notes which hitherto have not been followed by definite descriptions.
Tipo: Article / Letter to the editor
Ano: 1931
URL: http://www.repository.naturalis.nl/record/505589

Fossils of the type Maastrichtian
Provedor de dados: 16
Autores: Jagt, J.W.M.; Donovan, S.K.; Jagt-Yazykova, E.A.
The south-western Indian Ocean islands, excluding the microcontinent of Madagascar, are geologically complex and diverse. They have been subject to drastic sea level changes, volcanic events and anthropogenic changes, all of which have contributed to confuse understanding of their avian biogeography. An array of factors have affected these avifaunas, based on palaeontological, historical and molecular evidence,which together have shown that avian biogeography is not congruent with the relative age and size of the islands.
Tipo: Article / Letter to the editor
Palavras-chave: Macrofossils; Cretaceous; Maastrichtian; Mesozoic; Geology; Palaeontology; 38.20; 38.22.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/428551

The genus Polysiphonia in the Netherlands
Provedor de dados: 16
Autores: Veldkamp, H.
The vegetative characters — especially those which are important for identification of the species — together with the distribution of the Polysiphonia species occurring in Netherland’s waters were subject of the following study. The material used consisted for the greater part of dried specimens, present in the following collections: Rijksherbarium (Leiden), herbarium Van Goor, Zoological Station (Den Helder), herbarium of the “Koninklijke Nederlandse. Botanische Vereniging” (Rijksherbarium, Leiden) and the herbaria of the Universities of Amsterdam, Groningen and Utrecht.
Tipo: Article / Letter to the editor
Ano: 1950
URL: http://www.repository.naturalis.nl/record/524976

150 jaar Rijksherbarium en 25 jaar afdeling Nederlandse Flora
Provedor de dados: 16
Autores: Mennema, J.
The author gives a short historical survey of 150 years Rijksherbarium and makes mention of the current research, done by the 25 scientists of the institute. Furthermore he pays attention to the 25 years of existence of the department for the Netherlands (and European) flora, which was the subject of a separate paper in English (MENNEMA, 1979).
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/526818

Recent progress in diazirine based photoaffinity labeling
Provedor de dados: 19
Autores: Hashimoto, Makoto; Hatanaka, Yasumaru; 橋本, 誠.
Based on the recent development of molecular biology, the investigation of biofunctional machinery at their ligand accepting interface has become one of the challenging and important subject of post-genome field. The technique of photoaffinity labeling has become increasingly appreciated as a powerful methodology for the purpose. This micro review focused synthesis of trifluoromethylphenyldiazirine, which is one of the most promising photophore, and its application to the biomolecules.
Palavras-chave: Photoaffinity labeling; Chemical biology; Bioorganic chemistry; Structure-activity relationships; Diazirine.
Ano: 2008
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2700

A questionnaire survey of educational programs at the Obihiro Zoo, using Pteromys volans orii—an animal native to Hokkaido—as a subject
Provedor de dados: 19
Autores: 野村, 友美; 柚原, 和敏; 柳川, 久.
日本の動物園の二大事業として「種の保存」および「環境教育」が掲げられている．今後の動物園における教育的取り組みのさらなる充実が期待され，アンケート調査などを用いた来園者の実態調査および他機関との連携が不可欠とされている．おびひろ動物園で飼育されているエゾモモンガPteromys volans orii は，市街地の緑地などに生息する比較的身近な動物であるものの，夜行性の小型動物であるため一般市民の認知度は低い．一方，帯広畜産大学ではエゾモモンガに関する様々な研究がなされており，多くの知見が積み重ねられている．また本種は外見から人々に好印象を与える特徴を持っており，教育の題材として受け入れられやすいと考えられる．そこで本研究では，おびひろ動物園の来園者に動物園に対する意識およびエゾモモンガについてのアン ケート調査を行ない来園者の実態を知ることで，より効果的な教育への提言を行なうことを目的とした．調査の結果，年齢や性別，来園時のグループ構成および来園目的の違いは「エゾモモンガを見たことがあるか」，「エゾモモンガが身近に住む動物であることを知っていたか」に関係し ていなかったものの，自然保護活動に対する興味が強い人ほどこのような経験や認識が豊富であることが明らかになった．また，帯広畜産大学とおびひろ動物園の連携について， 95.4％の来園者が重要であると解答していた．したがって，郷土の動物であるエゾモモンガを用いて大学と動 物園が協力して教育を行なっていくことで，帯広市民の自然に対する興味関心を増大させることができる可能性があると考えられる．
Palavras-chave: 動物園; 環境教育; エゾモモンガ; 大学との連携; アンケート調査.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4383

Report on IODE data and information centres quality management and certification.
Provedor de dados: 20
This document will consider the subject of data and information centres certification and assessment to ensure consistent data is provided by NODC's to the broad user community. The Committee is invited to comment on the need for certification of data centres.
Tipo: Conference Material
Palavras-chave: Oceanographic institutions.
Ano: 2009
URL: http://hdl.handle.net/1834/3170

A Fisheries Co-management Case Study from The Gambia
Provedor de dados: 20
Autores: Njie, M.; Mikkola, H.
User involvement in fisheries management has been around for some time, but few analytical papers have been published on the subject in Africa. Most of these initiatives fall under the rubric of co-management. But what is the concept of co-management in theory and how does it work in practice? In reviewing a comprehensive artisanal fisheries development project, we will attempt to answer this question in the context of The Gambia.
Tipo: Journal Contribution
Palavras-chave: Fisheries management.
Ano: 2001
URL: http://hdl.handle.net/1834/342

OceanPortal
Provedor de dados: 20
Autores: Brown, M.
The IODE has supported the creation of a global index of Internet websites containing ocean data and information, called OceanPortal (OP). It currently holds 5000+ records in eight super-categories/251 specific subject categories. OceanPortal has become a highly regarded international source-of-choice for marine site information, and it is currently the most frequently visited of all IOC websites.
Tipo: Conference Material
Ano: 2005
URL: http://hdl.handle.net/1834/2666

Anaerobic digestion - it’s a gas
Provedor de dados: 21
Autores: Smith, L.G.
The article in the Soil Association's Organic Farming magazine introduces the subject of anaerobic digestion, exploring some of the benefits and of installing this technology on farms and some of the difficulties encountered. Potential sources of funding and further information (eg: relevant ebsites) are also listed.
Tipo: Newspaper or magazine article
Palavras-chave: Air and water emissions; Farm nutrient management.
Ano: 2009
URL: http://orgprints.org/17309/1/anaerobic_digestion_article.pdf

Leistungsauftrag 2004-2007 an die Stiftung Forschungsinstitut fuer biologischen Landbau (FiBL), Frick; Thema Sozio-Ökonomie
Provedor de dados: 21
FiBL's activities in the area of socio-econmics centre around agricultural policy, market research and farm economics.
Tipo: Research Programme description
Palavras-chave: Policy environments and social economy; Markets and trade; Farm economics.
Ano: 2023

Leistungsauftrag 2004-2007 an die Stiftung Forschungsinstitut fuer biologischen Landbau (FiBL), Frick; Wissensmanagement
Provedor de dados: 21
In the area of knowledge transfer FiBL engages in 3 main areas:    - Communication: Publications, Internet sites, magazines, PR, research communication  - Advisory Service  - International Development Cooperation
Tipo: Research Programme description
Palavras-chave: Knowledge management.
Ano: 2023

Leistungsauftrag 2004-2007 an die Stiftung Forschungsinstitut fuer biologischen Landbau (FiBL), Frick; Thema Tierhaltung
Provedor de dados: 21
FiBL does research on animal husbandry in the following fields:    - Animal Health  - Veterinary Parasitology  - Animal husbandry&amp; breeding
Tipo: Research Programme description
Palavras-chave: Health and welfare; Breeding and genetics.
Ano: 2023

CERTCOST News
Provedor de dados: 21
Autores: Rebsdorf, Simon Olling.
The EU research project, CERTCOST, has issued the first digital CERTCOST newsletter. Despite the fact that organic  certification and its costs might be a somewhat dry subject from a consumer’s point of view, we intend to present the results in a eatable manner. The International Center for Research in Organic Food Systems, ICROFS, is responsible for dissemination of the CERTCOST project.
Tipo: Newspaper or magazine article
Palavras-chave: Values; Standards and certification Consumer issues Regulation.
Ano: 2010
URL: http://orgprints.org/20355/4/20355.pdf

ECONOMICS AND ECONOMISTS FOR ECONOMIC AND SOCIAL ADVANCEMENT
Provedor de dados: 31
Autores: Schapper,   Henry P.
My subject arises from a recent, though limited, personal experience in economic planning in an underdeveloped country. This was as a member of the Economic Survey Mission on the Economic Development of Zambia organised jointly by the United Nations Economic Commission for Africa and the F.A.O. It confronted me with questions about the usefulness of economics and the adequacy of economists for the development of policies to enable the majority of mankind to be freed from the shackles of poverty.
Tipo: Journal Article
Palavras-chave: Political Economy.
Ano: 1965
URL: http://purl.umn.edu/22649

WOOL IN 1980
Provedor de dados: 31
Autores: Watson,   Alistair S.
Since the introduction of a reserve price scheme in 1970, the interest in wool marketing previously shown by agricultural economists has not been maintained outside the public service and the wool industry itself. Nor is the subject as divisive amongst wool growers with, in general, 'orderly marketing' now acceptable to all factions of wool growers. The history of wool marketing discussion in Australia is reviewed and some reasons for this changing climate of opinion are discussed. An attempt is made to assess the actual performance of the buffer stock scheme in the light of the academic literature of the 1960s.
Tipo: Journal Article
Palavras-chave: Marketing.
Ano: 1980
URL: http://purl.umn.edu/22769

MULTIPRODUCT PRODUCTION CHOICES AND POLICY RESPONSE
Provedor de dados: 31
Autores: McIntosh,   Christopher S.; Shumway,   C. Richard.
A restricted profit function model of California agriculture is specified and estimated subject to prior information provided by economic theory. Symmetry, homogeneity, and convexity of the profit function are maintained in the estimation. Parameter estimates and elasticities are presented for four input and 10 output equations. Tests of the hypotheses of nonjointness in inputs and Hicks-neutral technical change in variable inputs and outputs are rejected. The impacts of decoupling agricultural program payments are examined.
Tipo: Journal Article
Palavras-chave: Agricultural Finance.
Ano: 1991
URL: http://purl.umn.edu/32610

THE ROLE OF EMOTIONS AND PERCEIVED CONTROL IN THE RECOVERY STRATEGY OF SERVICE COMPANIES
Provedor de dados: 31
Autores: Kolos,   Krisztina; Kenesei,   Zsofia.
The purpose of this study is to investigate the effectiveness of service recovery tactics. The research included a qualitative study based on 30 interviews with customers and employees of a telecommunication company. This was followed by a quantitative study using between subject experimental designs based on scenarios. Our research results suggest that employees’ positive emotions and perceived control during the recovery process make consumers more satisfied.
Tipo: Journal Article
Palavras-chave: Service recovery; Justice theory; Service failure; Customer satisfaction; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2009
URL: http://purl.umn.edu/53545

AN ANALYSIS OF MARKETING CHANNELS OF LOCAL FOOD IN SCOTLAND
Provedor de dados: 31
Autores: Revoredo-Giha,   Cesar; Watts,   D.; Leat,   Philip M.K.
Local food and its possibilities for addressing sustainable regional growth, food availability, accessibility and affordability has received considerable attention in the discussion on and development of the National Food Policy in Scotland. In terms of methodology, the paper continues the analysis of the local food database for Scotland constructed in Watts et al (2010) by exploring the marketing outlets used by the local food enterprises. This subject is important because it may provide information about the degree of entrepreneurship of the involved firms.
Tipo: Working or Discussion Paper
Palavras-chave: Local food; Scotland; Marketing outlets; Marketing.
Ano: 2010
URL: http://purl.umn.edu/109409

ECONOMIC THRESHOLDS: AN APPLICATION TO FLORICULTURE
Provedor de dados: 31
Autores: Schumacher,   Sara K.; Marsh,   Thomas L.; Williams,   Kimberly A.
This paper introduces conjunctive optimal pest management and production decision rules applied to the floriculture industry.  A grower is faced with optimally controlling multiple pests and applying cultural controls to maximize the expected net present value of benefits within a discrete time framework, subject to biological and marketing constraints.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/21790

OPTIMAL PEST CONTROL IN FLORICULTURE PRODUCTION OF ORNAMENTAL CROPS
Provedor de dados: 31
Autores: Schumacher,   Sara K.; Marsh,   Thomas L.; Williams,   Kimberly A.
We develop a conceptual bioeconomic model of floriculture production, wherein optimal decision rules depend on an intertemporal economic objective to maximize profits subject to economic and biological processes.  The necessary conditions highlight intertemporal tradeoffs between aesthetic benefits and expected future net benefits of insect stocks, which have important policy implications.
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2003
URL: http://purl.umn.edu/35025

THE JOURNAL OF FOOD DISTRIBUTION RESEARCH: A 15-YEAR PERSPECTIVE, 1984-1998
Provedor de dados: 31
Autores: Corbett,   James J.
In order to identify future implications for research in a discipline, it is sometimes necessary to investigate areas that have been examined previously. In this paper, a content analysis of 15 years of research articles published in the Journal of Food Distribution Research was undertaken to examine the direction that researchers have taken in the field of food distribution. An identification was made of the salient subject/topic areas documented over a significant period of time, 1984 through 1998.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1999
URL: http://purl.umn.edu/27222

ESTIMATING A MIXED STRATEGY EMPLOYING MAXIMUM ENTROPY
Provedor de dados: 31
Autores: Golan,   Amos; Karp,   Larry S.; Perloff,   Jeffrey M.
Generalized maximum entropy may be used to estimate mixed strategies subject to restrictions from game theory.  This method avoids distributional assumptions and is consistent and efficient.  We use this method to estimate the mixed strategies of duopolistic airlines.
Tipo: Working or Discussion Paper
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1996
URL: http://purl.umn.edu/25072

Consumer Information in the food service industry vs. food retailing
Provedor de dados: 31
Autores: Rogge,   C.B.E.; Becker,   Tilman C.
In order to define consumer expectations over a traceability and information system for the entire food supply chain, the information behaviour of consumers in the food service industry has been subject to an analysis for the first time. In comparison to consumers in retailing, significant differences appear in information seeking behaviour as well as in the information desired.
Tipo: Conference Paper or Presentation
Palavras-chave: Meat traceability; Consumer behaviour; Food service industry; Consumer/Household Economics.
Ano: 2008
URL: http://purl.umn.edu/44070

SOCIAL GAIN, WELFARE, POLITICAL ECONOMY AND A' THAT
Provedor de dados: 31
Autores: Kelso,   Maurice M.
The economic criterion of public investment choice is aggregate consumers' surpluses and producers' rents generated by the investment. Its analytical model is a social revenue function and a social cost function. It is a welfare criterion only so far as efficiency is a welfare component and then subject to severe limitations. It is argued here that the economist's conclusions rest in part on a set of value preferences; therefore, the test of their rightness is in part their acceptability to the public choice-maker.
Tipo: Journal Article
Palavras-chave: Political Economy.
Ano: 1966
URL: http://purl.umn.edu/22669

Social Security Tax and Benefit Issues, Questions and Answers for Farmers and Workers
Provedor de dados: 31
Autores: Smith,   Stuart F.
Social Security taxes are a major and growing expense of operating a farm business. Self-employed farmers and family farm workers have some flexibility in managing cash income subject to Social Security. A basic understanding of Social Security benefits as well as costs is required to make a rational decision about optimum coverage.
Tipo: Working Paper
Palavras-chave: Farm Management; Labor and Human Capital.
Ano: 1990
URL: http://purl.umn.edu/121545

PREFERENTIAL TRADE OF AGRICULTURAL COMMODITIES IN THE CARIBBEAN BASIN
Provedor de dados: 31
Autores: Loper,   Nathan; Abbott,   Philip C.; Foster,   Kenneth A.
Preferential agricultural trade under the Caribbean Basin Initiative has been beneficial to participating countries, particularly for differentiated goods.  Goods that have not performed well were either subject to policy changes, eroding preferences and deteriorating market trends or structural changes that diminished CBI exports.
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade.
Ano: 2003
URL: http://purl.umn.edu/22018

Estimating Production of Forest Cooperative Members
Provedor de dados: 31
Autores: Hoffman,   Benjamin F., Jr.
This study develops methods of estimating annual marketings by members of forestry cooperatives in order to formulate a long range business plan for the cooperative. A reliable prediction of total annual sales by the cooperative is possible, but individual product estimates are subject to significant errors. The report details cautions concerning the development and implementation of projections and makes specific recommendations. The system also permitted estimation of landowner service needs.
Tipo: Report
Palavras-chave: Silviculture; Forestry cooperatives; Forestry management; Marketing; Agribusiness.
Ano: 1985
URL: http://purl.umn.edu/52029

THE IMPACT OF MARKET MECHANISMS AND HACCP REGULATION ON FOOD SAFETY QUALITY
Provedor de dados: 31
Autores: Ollinger,   Michael.
Economists have long debated the relative effectiveness of markets and regulations in reaching socially desirable outcomes.  This empirical study of meat and poultry food safety regulation suggests that market mechanisms and flexible regulatory instruments, e.g. HACCP systems, have a greater impact on food safety quality than less flexible regulatory instruments.       Subject code: 9 (Food Safety and Nutrition).
Tipo: Conference Paper or Presentation
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2004
URL: http://purl.umn.edu/20150

WCA Framework
Provedor de dados: 31
Autores: Rain,   Tomas; Svarcova,   Ivana.
This article describes subject-matter and components of WCA Framework. Authors describe individual elements of WCA. Article is being coupled with explaining of WCA Framework. Authors furthermore introduce differences between WCA Framework and additional analytical methods. Authors pay attention to relation between information technology, information system, work system, firm and business environment.
Tipo: Journal Article
Palavras-chave: WCA Framework; Customer; Product; Business process; Information; Participant; Information technology; Research and Development/Tech Change/Emerging Technologies.
Ano: 2010
URL: http://purl.umn.edu/96877

Linking Science and Economics for Policy Advice: Case-study of Trees for Salinity Control
Provedor de dados: 31
Autores: Loane,   Bill.
In the first part of this paper I wish to make some observations about the general subject of the workshop - the extent to which the sustainability debate has affected economic policy advice. This is based mainly on the experience with salinity control in Victoria.  The second part is a case-study in the integration of science and economics for policy purposes, outlining a tree-salinity computer model I have been developing.
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy.
Ano: 1992
URL: http://purl.umn.edu/10338

Water use and salinity in the Murray–Darling Basin: A state-contingent model
Provedor de dados: 31
Autores: Adamson,   David; Mallawaarachchi,   Thilak; Quiggin,   John C.
The supply of water for irrigation is subject to climatic and policy uncertainty. The object of the present paper is to show how the linear and non-linear programming models commonly used in modelling problems such as those arising in the Murray–Darling Basin may be adapted to incorporate a state-contingent representation of uncertainty. Estimates showing the potential value of improved water use are also derived.
Tipo: Journal Article
Palavras-chave: Irrigation; Salinity; Uncertainty; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/118332

EFFECTIVE EXTENSION PROGRAMMING FOR RURAL DEVELOPMENT
Provedor de dados: 31
Autores: Woods,   Michael D.; Doeksen,   Gerald A.
This paper addresses the possible components of a rural/community development Extension program.  Issues such as subject matter selection, research base, and linkages with outside organizations are discussed.  The role of rural/community development in an agricultural economics academic setting is analyzed.  Recommendations for successful efforts are presented.
Tipo: Conference Paper or Presentation
Palavras-chave: Community/Rural/Urban Development.
Ano: 2003
URL: http://purl.umn.edu/35119

Taxation and Microeconomic Reform in the Agricultural Sector
Provedor de dados: 31
Autores: Goucher,   Garry.
This paper explores a number of topics within the broad subject of taxation and microeconomic reform as it affects the agricultural sector. Particular attention is focused on reform of the taxation system; the need for measures to support greater self-reliance on the part of farmers in managing risks; and the consequences of changes to the structure of charges for government services.
Tipo: Journal Article
Palavras-chave: Public Economics.
Ano: 1995
URL: http://purl.umn.edu/12541

MEASURING THE EFFECTS OF THE "TIMING OF TIME" ON SHADOW VALUES OF LEISURE TIME
Provedor de dados: 31
Autores: Larson,   Douglas M.; Lew,   Daniel K.; Barrett,   James M.
The "timing of leisure time" is important to determining its opportunity cost.  Shadow values of different leisure activities from a model of consumer choice subject to multiple binding time constraints are estimated from survey data on peoples' preferences for different activities, their time and money costs, and their consumption choices.
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer/Household Economics.
Ano: 2002
URL: http://purl.umn.edu/19626

Mata Matters: Subscripting
Provedor de dados: 31
Autores: Gould,   William.
Mata is Stata’s matrix language. In the Mata Matters column, we show how Mata can be used interactively to solve problems and as a programming language to add new features to Stata. Subscripting is the subject of this column. Stata has three subscripting modes, and two of them are about more than accessing an element of a vector or matrix. The advanced forms of subscripting can, by themselves, be the solution to some problems.
Tipo: Article
Palavras-chave: Mata; Subscripts; List subscripts; Range subscripts; Sampling with replacement; Permutation matrices and vectors; Research Methods/ Statistical Methods.
Ano: 2007
URL: http://purl.umn.edu/119258

ENVIRONMENTAL RISK MANAGEMENT IN THE HORTICULTURAL INDUSTRY
Provedor de dados: 31
Autores: Parker,   Douglas D.; Helal,   Uddin.
This paper uses environmental risk assessment as a nutrient management planning tool to determine the best set of actions to control nutrient nonpoint source pollution in the horticultural industry.  The framework minimizes costs subject to obtaining an environmental risk management score at or below a threshold value.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Environmental Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/21752

OPTIMAL STRATEGIES FOR REGIONAL CULTIVAR TESTING FOR VARIOUS CROPS
Provedor de dados: 31
Autores: Kingwell,   Ross S.
Before a variety is released for adoption by farmers in a region it is subject to comparative field testing. An economic issue is how extensive and prolonged should be this field testing within the region; over how many locations, years and with what number of plot replications should testing occur? This paper addresses this issue for the main broadacre crops grown in Western Australia and shows through sensitivity analysis how robust are the findings for each crop type. Findings are contrasted with those already published for southern New South Wales.
Tipo: Presentation
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/123827

Economics of Integrated Watershed and Reservoir Management
Provedor de dados: 31
Autores: Lee,   Yoon; Yoon,   Taeyeon; Shah,   Farhed A.
A dynamic optimization framework is used to analyze integrated watershed management and suggest appropriate policies. Soil conservation, reservoir level sediment release, downstream water allocation and water quality are subject to control. Application of the model to the Aswan Dam watershed illustrates the need for international cooperation to manage shared watersheds.
Tipo: Conference Paper or Presentation
Palavras-chave: Watershed management; Soil erosion; Reservoir sedimentation; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q25; Q53.
Ano: 2009
URL: http://purl.umn.edu/49478

Alexander Macleay, Transport Office, [London], to James Edward Smith
Provedor de dados: 24
Autores: Macleay, Alexander.
Concerned to hear Smith so ill since leaving London. Distressed by death of a "beloved and affectionate brother". The Linnean Society now has its charter; [Thomas] Marsham, [Jonas] Dryander, and himself are to meet on the subject but fear they will be able to do little without Smith's presence, asks when he is arriving in London.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64526/1/JES-AM-23_001.tif

Sir George Thomas Staunton, Canton, [China], to James Edward Smith
Provedor de dados: 24
Autores: Staunton, 2nd baronet, Sir George Thomas.
Having being requested by Government General of Bengal to gather informtion on the cultivation of cotton in China, he met with the subject at considerable length in a Chinese work, which has been translated and is now enclosed as a paper for the Linnean Society [see RelatedMaterial below].
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64299/1/JES-COR-25-87_001.tif

William Bulmer, Shakespeare Printing Office, Cleveland Row, St James's, [London], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Bulmer, William.
A drawing belonging to George Walker of Hunter Square, Edinburgh, was mistakenly forwarded to Smith by Mr Edwards of Pall Mall; asks Smith to forward it to Walker and refers to letter of Thomas Johnes on subject [on preceeding folio of this letter].
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63838/1/JES-COR-21-61_001.tif

Coralline specimen
Provedor de dados: 24
Specimen of a coralline, glued on paper, and possibly collected by John Ellis or G. D. Ehret at Brighton when Ellis was working on the subject. See letters from John Ellis to Carl Linnaeus, 1767, "The Linnaean correspondence", linnaeus.c18.net, letters L3905, L3923, L3936, L3941. See also Ellis, J. 1753. Observations on a Remarkable Coral-Line, in a Letter from Mr. John Ellis to the Rev. Thomas Birch, D. D. Secret. R. S. "Philosophical Transactions of the Royal Society". 48, pp. 115-117. With illustrations by G. D. Ehret.
Tipo: Collection
Ano: 2023

Sir Thomas Frankland to James Edward Smith
Provedor de dados: 24
Autores: Frankland, Sir Thomas, 6th baronet.
His eldest son, aged 20, has developed consumption and they are about to embark for either Lisbon or Madeira subject to Dr Ritcairn's opinion. Received Smith's letter on 'Chelone barbata'.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62994/1/JES-COR-15-18_001.tif

Manuscripta Medica Tom. I
Provedor de dados: 24
Autores: Linnaeus, Carl.
title   &lt;Caroli Linnaei | Manuscripta Medica | Tom. I. in qvo conite[tur] | Historiae na[tur]alis fragmenta | α Mineralogia | β Botanica | γ Soologia [sic] | δ. Miscellanea | ε. Excerpta Actorum Lipsiensium | ab anno 1727 Mens. Aug. ad 1730 initium&gt;    Linnaeus sowed the notebook after taking the notes in each fascicles, arranging the fascicles in thematic order, according to subject.    Linnean Society rubber-stamp
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/56408/1/LM-LP-Gen-MM-1_003.tif

'Utdrag utaf ett Bref ifrån Doctor P. Bjerchén'
Provedor de dados: 24
Autores: Solander, Daniel.
Full title: 'Utdrag utaf ett Bref ifrån Doctor P. Bjerchén, af | London d. 1 Martii 1758.'  Extract of a letter about a Black girl of 10 years from Jamaica who was an albino.  Copy by Daniel Solander - original letter apparently lost. See letter from Pehr af Bjerkén to Carl Linnaeus, 14 June 1758 n.s., "The Linnaean correspondence", linnaeus.c18.net, letter L2365, on the same subject.
Tipo: Collection
Ano: 2023

Edward Seymour, Park Lane, [London], to Sir James Edward Smith
Provedor de dados: 24
Autores: Seymour, Edward Adolphus, 11th Duke of Somerset.
The intelligence Smith sent him is not surprising and wonders at inclination which induced Smith to apply to him, but does not blame Smith for well meant endeavours [subject unclear].
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64261/1/JES-COR-25-49_001.tif

The coming of age of cosmophysics
Provedor de dados: 42
Autores: Jacob,Maurice.
''Cosmophysics'' as reviewed is a multidisciplinary domain which brings together astroparticle physics, fundamental physics in space and topics related to the structure and evolution of the Universe. It represents a growing interface between high-energy particle physics and astro-physics. This paper presents a general overview of the subject, focusing on cosmology, cosmic rays, dark matter searches and the soon-expected observation of gravitational waves.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astrophysics; Cosmology; Gravitational wave; Space research; Universe/structure; Universe/evolution.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000200002

Milho: a Interação Y1 Y3 Y7 na coloração amarela do endosperma
Provedor de dados: 43
Autores: Graner,E. A.
This paper deals with the genetic interaction of Yl Y3 Y7 in producing yellow endosperm in maize. The new data presented are in accordance with preliminary notes on the same subject. The recessive yl, y3 and y7produce respectively green plants, albescent plants and white seedlings.
Tipo: Info:eu-repo/semantics/article
Ano: 1961
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761961000100002

The beginning of life of a new human being from the scientific biological perspective and its bioethical implications
Provedor de dados: 48
Autores: Ventura-Juncá,Patricio; Santos,Manuel J.
The issue of when the human life begins is a very important subject since it has a significant impact on the decisions that we have to take in relation to human beings in development, particularly human embryos. In this article we discuss some of the more relevant biological evidence supporting the fact that beginning human life begins unquestionably at fertilization and the bioethical consequences.
Tipo: Journal article
Palavras-chave: Fertilization; Beginning of human life; Bioethics.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000200013

Figuras del sujeto (Dossier)
Provedor de dados: 122
Autores: Gutiérrez, Daniel.
Este artículo discute acerca de la noción del sujeto en las ciencias sociales, analizando las diferentes interpretaciones que se le ha dado desde la sociología, el psicoanálisis y la lingüística.
Tipo: Artículo
Palavras-chave: SUJETO; CIENCIAS SOCIALES; ACCIÓN SOCIAL; LACAN JACQUES; PSICOANÁLISIS; SOCIAL SCIENCES; SOCIAL ACTION; SUBJECT; PSYCHOANALYSIS.
Ano: 2002
URL: http://hdl.handle.net/10469/2102

Grape and wine phenolics: Observations and recent findings
Provedor de dados: 118
Autores: Kennedy,James A.
What consumers taste in wine is the culmination of management practices from the vineyard to the glass. As researchers, in order to have control over the composition of wine at the time of consumption, it is important to understand how production practices affect wine chemistry. Because phenolic compounds are so important to the overall quality of wine, they are the subject of intense investigation throughout the world. This review is a summary of current knowledge and some recent findings that have taken place in this area.
Tipo: Journal article
Palavras-chave: Anthocyanins; Proanthocyanidins; Red wine; Tannins; Vitis vinifera.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200001

Modelo de espacio de estados con observaciones censuradas.
Provedor de dados: 32
Autores: Ariza Hernández, Francisco Julián.
En este trabajo, presentamos algunas alternativas par estimar los parámetros de un Modelo de Espacio de Estados (SSM, por sus siglas en inglés) cuando se tiene el problema de datos incompletos, los algoritmos de Esperanza-Maximización (EM), Monte Carlo EM y EM Estocástico son implementados. También, se presenta una aproximación a la función de verosimilitud utilizando Muestreo de Importancia. Se realizó un estudio de simulación para estudiar el desempeño de estos procedimientos para un modelo de espacio de estados con diferentes porcentajes de censura en las observaciones. Los algoritmos son implementados a dos conjuntos de datos reales; el primero, a datos sobre contaminación del aire con observaciones sujetas a límites inferiores de detección y con datos...
Palavras-chave: Algoritmo EM; Algoritmo EM estocástico; Algoritmo EM Monte Carlo; Recursiones de Kalman; Límites de detección; Datos perdidos; EM algorithm; Stochastic EM algorithm; Monte Carlo EM algorithm; Kalman recursions; Limits of detection; Missing data; Doctorado; Estadística.
Ano: 2010
URL: http://hdl.handle.net/10521/302

Process design and sustainability in the production of bioethanol from lignocellulosic materials
Provedor de dados: 69
Autores: Scott,Felipe; Quintero,Julián; Morales,Marjorie; Conejeros,Raúl; Cardona,Carlos; Aroca,Germán.
Background: Bioethanol is produced mainly from sugar cane and corn. In the last years it has been subject of debate due to the effects in food prices and land use change. The use of lignocellulosic materials for bioethanol production, such as agroindustry, forestry and municipal residues, wood or dendroenergetic species, has been proposed as a sustainable way for producing this biofuel. The design of a sustainable process for producing bioethanol requires a methodological approach whereby economical, environmental and social criteria are systematically integrated from the early stages of process design. Results: Until now a methodology for guiding the design of a sustainable process for bioethanol production is not available, and there are just a few...
Tipo: Journal article
Palavras-chave: Bioethanol; Life cycle analysis; Lignocelluloses; Sustainability.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000300013

Sampling and observation of oceanic mantle and crust on gorringe bank
Provedor de dados: 5
Autores: Auzende, Jean-marie; Olivet, Jean-louis; Charvet, J; Le Lann, Alain; Le Pichon, Xavier; Monteiro, Jh; Nicolas, Anne; Ribeiro, A.
THE structure and nature of the uppermost oceanic mantle and crust has been, and still is, the subject of a major international research effort . Yet the direct field evidence known to us on this subject, whether obtained by drilling in the I.P.O.D. oceanic crust programme² or by submersible surveying in the Famous programme , has been either very incomplete or limited to the upper part of layer 2. As a result, the problem of the comparison between ophiolites and oceanic crust is still debated . We report here the preliminary results of an in situ geological survey in which we have sampled and observed what we believe to be an almost complete geological section starting a few kilometres below the Moho discontinuity and ending in the upper part of layer 2...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-5230.pdf

Experimental analysis of a strong fluid–structure interaction on a soft membrane—Application to the flapping of a yacht downwind sail
Provedor de dados: 5
Autores: Deparday, Julien; Augier, Benoit; Bot, Patrick.
In the present study we investigate the flapping instability of a light, soft, highly cambered membrane subject to wind loading. An original in-situ experiment is developed where time-resolved pressures and forces are measured on a full-scale yacht downwind sail called a spinnaker. Particular features of this aero-elastic problem are that the membrane is weakly constrained – held only at three corners –, has a free leading edge, and has no proper shape in the absence of wind loading. In usual operating conditions, the soft structure is subject to a flapping instability giving rise to almost periodic folding and unfolding of the fore part of the sail, associated to strong variations of pressures and forces. This dynamic behavior is analyzed in detail and...
Tipo: Text
Palavras-chave: Fluid structure interaction; Full-scale experiment; Modal decomposition; Pressure measurements; Soft membrane.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00444/55561/60479.pdf

First steps of biofilm formation on stainless steels in natural seawater
Provedor de dados: 5
Autores: Bellon-fontaine, M.-n.; Bertrand, P; Compere, Chantal; Costa, D; Guezennec, Jean; Marcus, P; Poleunis, C.; Pradier, C.-m.; Rondot, B; Walls, M.g.
Numerous works are reported in literature concerning the biofilm growth on surfaces in seawater but the understanding of the adhesion mechanisms in the first steps of immersion is still subject to investigations. A knowledge of the chemical composition and of the kinetics of conditioning layer formation is a central requirement for a sound scientific understanding of biofilm growth. Due to its complexity and to the interdisciplinary nature of the subject, this research asks for the collaboration between the fields of material science, surface analyses, chemistry, marine microbiology and biochemistry. The first steps of biofilm formation on 316L stainless steels immersed in natural sea water have been studied, using a broad range of surface characterisation...
Tipo: Text
Palavras-chave: Sea water; Substrates; Biofilm.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-1699.pdf

Evolutional and environmental aspects of Mar Chiquita Lagoon (Buenos Aires province, Argentina)
Provedor de dados: 5
Autores: Fasano, J L; Hernandez, Ma; Isla, F I; Schnack, E J.
Geomorphologic and stratigraphic research, supported by radiocarbon datings, give us an approach to reconstruction of the evolution of Mar Chiquita lagoon. The estuarine body originated during the regressive phase that followed the transgressive "maximum". After this maximum, a short rapid fall of the sea level restricted the estuarine environments which resulted in the formation of the lagoon. Predominant landforms are related to the regressive phase. Mar Chiquita lagoon has a mean surface of 46 km super(2) and a drainage basin of about 10,000 km. It is subject to significant salinity variations. Hydrogeological investigations show the influent character of the water table in relation to the lagoon. The water table rise associated with the "rejected...
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00246/35737/34245.pdf

Prevalence of Bipartite Patella in Turkish Population: Analysis of Bilateral Knee Radiographs in 897 Subjects
Provedor de dados: 77
Autores: Kose,Ozkan; Eraslan,Ali; Ergun,Ali; Egerci,Omer Faruk; Ercan,Emrah Cevat.
Bipartite patella is a normal anatomic variant of patella. There are various data about the prevalence of bipartite patella in the literature. The aim of this study was to investigate its prevalence, type distribution and sex predilection in Turkish population. Bilateral knee radiographs were retrospectively reviewed of 897 consecutive adult patients. Cases with bipartite patella were categorized according to the Oohashi classification. Medical records were examined in order to differentiate symptomatic and asymptomatic bipartite patellae. We contacted symptomatic patients by telephone to learn continuity of knee pain. We identified 11 cases (7 male, 4 female) of bipartite patella among the 283 male and 614 female patients. No bilateral cases were...
Tipo: Journal article
Palavras-chave: Bipartite patella; Turkish population; Prevalence; Epidemiology.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300047

Modern systematics, a further botanical note
Provedor de dados: 16
Autores: Holttum, R.E.
As noted in Dr L.G.M. Baas Becking’s Postscript to Mr van Bemmel’s article in Chronica Naturae Vol. 104, part 4, the new systematics has not been entirely neglected by botanists. I would like to put a further botanical vieuwpoint on this subject. Firstly, I suggest that there is no sharp distinction between the old systematics and the new; secondly, I would emphasize that systematics of the primary descriptive type are an essential basis for the new systematics, and that we are still a long way from completeness in our primary systematic study of Malaysian plants. Systematics of the primary descriptive type need not be out of touch with modern scientific thought. The field botanist in the tropics cannot regard the subject of his study as dead material. But...
Tipo: Article / Letter to the editor
Ano: 1948
URL: http://www.repository.naturalis.nl/record/533110

Studies on Malayan Blattidae
Provedor de dados: 16
Autores: Bruijning, C.F.A.
INTRODUCTION The Blattid fauna of the Malayan subregion is very rich, accordingly since the earliest period of orthopterology students of Blattids have described and mentioned specimens from this region. Consequently the literature on Malayan Blattidae is greatly scattered, and though some of the authors did a considerable amount of work in compiling the most important contributions on the present subject, there is still much to be done in unravelling synonymy and distinguishing generic units and subfamilies. Brunner (1865) already described a great number of Malayan Blattidae. The descriptions of new species by Walker (1868, 1869 and 1871) are very vague and full of mistakes, giving rise to a great deal of confusion. Shelford largely restored the...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1948
URL: http://www.repository.naturalis.nl/record/319372

Notes on some recent and fossil cats, chiefly from the Malay Archipelago
Provedor de dados: 16
Autores: Brongersma, L.D.
INTRODUCTION The present paper contains notes on some recent cats in the collections of the Rijksmuseum van Natuurlijke Historie, Leiden, as well as descriptions of the fossil Felidae in the "Collectie Dubois", Leiden, which its Director Prof. Dubois entrusted to me. The fossils were collected in Java 1) by Prof. Eug. Dubois during his searches for remains of the precursor of man, and with the intention to gather data about the geological age and ecology of this precursor (cf. Dubois, 1888). The age of the deposits from which the fossil cats were collected, has been much discussed. A review of the literature (up to 1931) on this subject has been given by Van Es (1931), who concludes that the Trinilfauna must be referred to the lower plistocene age, while...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.84.
Ano: 1935
URL: http://www.repository.naturalis.nl/record/318121

Obituaries and biographical notes
Provedor de dados: 16
Autores: NN.
Arckenhausen, J.C.P. (1784-1855) The draftsman from Goslar, Germany, who was in the service of C.L. Blume, from 1829 till 1832 or probably later. He worked up many of the drawings Blume had brought from Bogor, for the Flora Javae, mostly vol. 1 and 2, fewer vol. 3 and 4. In a book by H.G. Griep e.a., published by the Museumsverein Goslar (1977), details are given, and several fine reproductions. Blume, C.L. (1796-1862) The botanist for Java, first director of the Bogor Botanic Gardens, and founder of the Rijksherbarium, is the subject of a typewritten study by A. den Ouden: C.L. Blume, periode 1826-1832, 136 + xii p. It is a preliminary paper (in Dutch) for a Ph.D. thesis. Author delved into various archives and came up with a large harvest. There is an...
Tipo: Article / Letter to the editor
Ano: 1980
URL: http://www.repository.naturalis.nl/record/533494

A monograph of the fern genus Pyrrosia (Polypodiaceae)
Provedor de dados: 16
Autores: Hovenkamp, P.
This monograph deals with the systematics and phylogeny of the genus Pyrrosia (Polypodiaceae). It is one of the results of the Polypodiaceae-project that is being carried out under the supervision of Prof. Dr. Hennipman (State University, Utrecht). With this treatment of Pyrrosia, the group of the Platycerioid ferns (sometimes regarded as a subfamily) will be completed. The total number of genera in this group is reduced to two: Platycerium and Pyrrosia. Other publications dealing with this group are Hennipman &amp; Roos (1982), dealing with Platycerium; and Ravensberg &amp; Hennipman (1986), dealing with the former genera Drymoglossum and Saxiglossum, now in Pyrrosia. Together with Hennipman &amp; Ravensberg’s account this forms the first complete account...
Tipo: Article / Letter to the editor
Ano: 1986
URL: http://www.repository.naturalis.nl/record/508235

More light upon the problem of the Oyster’s nutrition
Provedor de dados: 16
Autores: Korringa, P.
Modern oyster culture began its development in the second part of the nineteenth century. Beginning in Europe it gradually spread over all the world’s oyster regions. Locally oyster cultural methods acquired a high degree of technical specialisation, recently even including chemical control of oyster diseases. A steadily increasing stream of scientific and technical papers, dealing with oyster biology and oyster culture, accompanied this development, and already numbers several thousands of publications. If closely related industries, such as cattle-breeding, horticulture, and agriculture, are compared with it, it is clear that one of the basic problems of oyster culture must be the oyster’s nutrition. Without a detailed knowledge of this subject it seems...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504315

Flavone C-glycosides, phenolic acids and nitrogen content in leaves of barley subject to organic fertilization treatments
Provedor de dados: 21
Autores: Nørbæk, R.; Folsted, D.; Bleeg, I.S.; Christensen, B.T.; Brandt, K.; Kondo, T.
From the leaves of barley, Hordeum vulgare, one new flavone C-glucoside and three known flavone glucosides were isolated and characterized by 1H, 13C NMR and MALDITOF-MS. The novel flavone C-glucoside was isovitexin 7-O-b-(6’’’-O-(E)-p-coumaroyl)glucoside and the known compounds were isovitexin 7-O-b-(6’’’-O-(E)-feruloyl)glucoside, isoorientin 7-O-b-(6’’’-O-(E)-feruloyl)glucoside and tricin 7-O-b-glucoside. The sum of all the flavone glycosides and soluble phenolic acids in the leaves decreased with increased rate of plant nutrients given in animal manure and with increased crop yield. All major phenylpropanoids showed the same general response to nutrient level. The concentration of nitrogen in the leaves was not directly related to nutrient application...
Tipo: Journal paper
Palavras-chave: Crop husbandry.
Ano: 2003
URL: http://orgprints.org/338/1/A%2Dmanuscript.pdf

30 years of research on insect galls in Brazil: a scientometric review
Provedor de dados: 84
Autores: Araújo,Walter Santos de.
Abstract The first systematic studies on insect galls in Brazil date to the early 20th century, after which research on insect galls remained dormant in the country, with interest not reviving until the 1980s. The aim of this study was is to document historical trends in publications about insect galls in Brazil over the last 30 years. Papers about insect galls and galling species in Brazil published in peer-reviewed journals from 1988 to 2017 were compiled. A total of 1,378 papers were analyzed, of which 182 addressed insect galls in Brazil. The results showed that the number of publications on the subject has been increasing over the last 30 years, and especially in the last decade. The diversity of journals that published on the subject has also been...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological interaction; Galling insects; Plant-insect interaction; Scientometry.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100232

Interpretation of the Construction of Socialist New Countryside
Provedor de dados: 31
Autores: Wu,   Xiao-jun; Jin,   Fu-hua.
Several old problems in the new countryside construction at present are analyzed. For instance the land transfer mechanism is not flexible, land problems have restricted the development of agricultural industrialization; farmers still have serious problems in income increase and lack the rational investment and consumption awareness; farmers receive low level of education and their cultural qualities are general poor; for a long time, legalization and democratization process of rural grass-roots organizations has been lagged behind. Causations for problems in the new countryside construction are various, such as lacking the subject consciousness, a long-term mechanism, industrial support and capital input. Finally, several new ideas about the construction...
Tipo: Journal Article
Palavras-chave: New countryside construction; Agricultural industrialization; Subject consciousness; Long-term mechanism; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/108460

Grey Correlation between Agricultural Input Factors and Regional GDP Growth in Anhui Province
Provedor de dados: 31
Autores: Men,   Ke-pei; Zhao,   Kai.
In order to analyze the relation between agricultural input factors and economic growth in Anhui Province, the evaluation index system of agricultural input is built from the perspectives of subject, object and tools based on grey system theory. The government investment in agricultural science and technology is selected as the index of labor subject, that is labor-related index（X1）, the total sown area of crops is selected as the index of labor object（X2）, the investment in rural water and electricity construction is chosen as the index of tools（X3）, and the GDP of Anhui Province is denoted by X0. According to the relevant data, the improved model of grey correlation analysis is adopted to calculate the correlation among the investment in agricultural...
Tipo: Journal Article
Palavras-chave: Anhui Province; Agricultural input factors; Grey correlation; GDP; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/93664

INFORMATION CASCADES WITH FINANCIAL MARKET PROFESSIONALS:  AN EXPERIMENTAL STUDY
Provedor de dados: 31
Autores: Alevy,   Jonathan E.; Haigh,   Michael S.; List,   John A.
In settings where there is imperfect information about an underlying state of nature, but where inferences are made sequentially and are publicly observable, information cascades can lead to rational herding.  Cascade phenomena may be seen in a variety of areas including technology adoption, financial market behavior, as well as in social processes such as mate selection or fads and fashions.  Theories of rational herding have found a natural testing ground in experimental environments since the character of private and public information can be readily controlled.  In previous experimental studies, behavior consistent with Bayesian benchmarks has been observed in simple contexts, but there are substantial reductions in experimental environments that...
Tipo: Conference Paper or Presentation
Palavras-chave: Marketing.
Ano: 2003
URL: http://purl.umn.edu/18976

Privatização dos serviços de extensão rural: uma discussão (des)necessária?
Provedor de dados: 31
Autores: Diesel,   Vivien; Froehlich,   Jose Marcos; Neumann,   Pedro Selvino; Silveira,   Paulo Roberto Cardoso da.
The article analyzes and discusses the privatization of the rural extension services according to international literature. To start with, the subject is set in the horizon of the debate of the so called State Reform, which determined the agenda for the development since the 1980’s. Next, we show how the subject has been treated so far having the economic theory as background and we examine experiments of privatization at international level. The analysis of such experiments reveals that the early agenda for the privatization took for granted that the rural extension services − which were a responsibility of the State − would be held completely by the private sectors. However, a series of obstacles appeared and arguments for models of privatization in...
Tipo: Journal Article
Palavras-chave: Rural extension; Privatization; State reform; Rural development.; Agribusiness; Q16.
Ano: 2008
URL: http://purl.umn.edu/61200

Evaluating conservation auctions with limited information: the policy maker’s predicament
Provedor de dados: 31
Autores: Schilizzi,   Steven; Latacz-Lohmann,   Uwe.
Buying environmental services from private landholders using tendering mechanisms are usually subject to a budget constraint. Auction theory has mostly focused on target-constrained auctions and is less well developed for this type of auction. This paper examines a theoretical model specifically developed for budget-constrained tenders and assesses its capacity to predict tendering performance under information limitations typical of those found in field applications. But this assessment cannot be done without complementing the model with controlled laboratory experiments. Subject to their external validity, we find that the model is able to make the correct policy recommendation when comparing the tender to an equivalent fixed price scheme, even when the...
Tipo: Working or Discussion Paper
Palavras-chave: Auctions; Procurement; Tenders; Conservation; Economic experiments; Model validation; Environmental Economics and Policy; Land Economics/Use; C91; C92; D44; Q24; Q28.
Ano: 2011
URL: http://purl.umn.edu/100884

Polarity in DEA Models
Provedor de dados: 31
Autores: Agrell,   Per J.; Bogetoft,   Peter; Tind,   Jorgen.
This article discusses models in data envelopment analysis (DEA) relaxing the standard convexity assumptions. The basic model treats mutually incomparable pairs of sets to be generated by a procedure proposed earlier. Each pair consists of a consumption set and a production set of feasible input-output combinations. Two fundamental operations by the procedure are based on intersection and convex hull generation in the input-output space. A polarity analysis is performed which, subject to the usual assumptions about free disposability and nonnegativity, appears fruitful to do in the framework of blocking and antiblocking sets. It is shown how this leads to an interchange of the above operations extending some classical results from convex analysis. The last...
Tipo: Working or Discussion Paper
Palavras-chave: Data Envelopment Analysis; Polarity; Research Methods/ Statistical Methods.
Ano: 2000
URL: http://purl.umn.edu/24188

Laws, Defects and Countermeasures on the Circulation of Rural Housing Land －From the Perspective of Farmer’ Rights Protection
Provedor de dados: 31
Autores: Mao,   Ping; Song,   Jiao; Pan,   Qiang.
The thesis combs the existing legal provisions about rural housing land from the perspectives of use restriction, means restriction, subject restriction and mortgage prohibition, and finds out their defects, namely, weakening real right, confused knowledge about the integration of house property and land property, the loophole in Land Administration Law, the bans on the rural residents’ purchase of housing land and so on. Then the thesis expounds the harms of restricting the circulation of housing land, for example, it will result in underground transaction of housing lands; lead to untenanted lands and waste of resources; bring about financing difficulty for peasants; do harm to the interest of land owners (rural collective economic organizations) and so...
Tipo: Journal Article
Palavras-chave: Circulation of housing lands; Legal lease; Protection of the peasant’s interests; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/96053

Bioenergy and Food Security: Markets, Institutions and Regulation
Provedor de dados: 31
Autores: Carvalho,   Pacheco de; Bernardo,   M.T.
The discussion about bioenergy solutions and respective interaction with food security concerns continues to be a difficult subject in the international arena. The academic efforts to address the issue should be based on facts and models that allow a sound decision process. However, beyond theoretical considerations and model implications, the facts based on case studies provide, probably, the most powerful arguments, mainly when they are supported by some rationalization and a chosen reference model. The research we want to discuss is based on the study of the two major countries and “players” in the bioenergy initiatives and related agricultural changes driven by that process, USA and Brazil. The key factors to study the subject are markets, institutions...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics.
Ano: 2010
URL: http://purl.umn.edu/100501

ENVIRONMENTAL COMPLIANCE IN U.S. AGRICULTURAL POLICY:  PAST PERFORMANCE AND FUTURE POTENTIAL
Provedor de dados: 31
Autores: Claassen,   Roger; Breneman,   Vincent E.; Bucholtz,   Shawn; Cattaneo,   Andrea; Johansson,   Robert C.; Morehart,   Mitchell J.
Since 1985, U.S. agricultural producers have been required to practice soil conservation on highly erodible cropland and conserve wetlands as a condition of farm program eligibility. This report discusses the general characteristics of compliance incentives, evaluates their effectiveness in reducing erosion in the program's current form, and explores the potential for expanding the compliance approach to address nutrient runoff from crop production. While soil erosion has, in fact, been reduced on land subject to Conservation Compliance, erosion is also down on land not subject to Conservation Compliance, indicating the influence of other factors. Analysis to isolate the influence of Conservation Compliance incentives from other factors suggests that about...
Tipo: Report
Palavras-chave: Conservation compliance; Sodbuster; Swampbuster; Conservation policy; Agri-environmental policy; Nutrient management; Buffer practices; Agricultural and Food Policy.
Ano: 2004
URL: http://purl.umn.edu/34033

Food Safety Audits, Plant Characteristics, and Food Safety Technology Use in Meat and Poultry Plants
Provedor de dados: 31
Autores: Ollinger,   Michael; Muth,   Mary K.; Karns,   Shawn A.; Choice,   Zanethia.
Food safety technology can increase a company’s capacity to prevent a foodborne contamination. A food safety audit—a quality control tool in which an auditor observes whether a plant’s processing practices and technologies are compatible with good food safety practices—can indicate how effectively food safety technology is being used. Fast food restaurants, grocery stores, and other major customers of meat and poultry processing plants conduct their own audits or hire auditors to assess the soundness of a plant’s processing operation. Meat and poultry plants can also audit themselves as a way to help maintain process control. In this report, we document the extent of food safety audits in meat and poultry processing plants. We also examine the associations...
Tipo: Report
Palavras-chave: Meat and poultry processing; Safety standards; Product recalls; Food safety technology; Food safety audits; Agribusiness; Food Consumption/Nutrition/Food Safety; Industrial Organization; Livestock Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/117989

Analysis of the Relationship between State Budget and Trade Balance of Libyan Economy (Period: 2000 – 2008)
Provedor de dados: 31
Autores: Maitah,   Mansoor; der Ali,   A.
The subject of the relationship between state budget and trade balance is important as economic subject, not only at the level of developing countries, but also at of advanced ones, too. Such importance emerged clearly when 1980s witnessed in United States of America a deficit in both state budget and trade balance, which was called at that time as the twin or dual deficit. We can say that the analysis of relationship between state budget and trade balance states the extent of mutual effect between financial and trade policies of any economy, namely; any change in the outcome of either one may affect the other in the same degree. To put in other words, the instruments of financial policy represented by total incomes and total expenditures can affect the...
Tipo: Journal Article
Palavras-chave: State budget; Trade balance; Libya; Trade policy; Fiscal policy; Financial Economics; International Relations/Trade; GA; IN.
Ano: 2010
URL: http://purl.umn.edu/99221

Bioeconomic Analysis of Aquaculture's Impact on Wild Stocks and Biodiversity
Provedor de dados: 31
Autores: Tisdell,   Clement A.
Anderson theorizes that development of the aquaculture of a species of fish (also captured in an open-access fishery) favours the conservation of its wild stocks, if competitive market conditions prevail. However, this theory is shown to be subject to significant limitations. While this is less so within his model, it is particularly so in an extended one outlined here. The extended model allows for the possibility that aquaculture development can impact negatively on wild stocks thereby shifting the supply curve of the capture fishery, or raise the demand for the fish species subject both to aquaculture and capture. Such development can threaten wild stocks and their biodiversity. While aquaculture development could in principle have no impact on the...
Tipo: Working or Discussion Paper
Palavras-chave: Aquaculture development; Aquatic conservation; Biodiversity; Common-property; Fish farming; Open-access fishery; Environmental Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/48739

Optimal Corridor Design for Grizzly Bear in the U.S. Northern Rockies
Provedor de dados: 31
Autores: Suter,   Jordan F.; Conrad,   Jon M.; Gomes,   Carla P.; van Hoeve,   Willem Jan; Sabharwal,   Ashish.
In an attempt to address the negative ecological impacts of habitat fragmentation, wildlife corridors have been proposed as a way to connect areas of biological significance. In this paper, a model to maximize the amount of suitable wildlife habitat in a fully connected parcel network linking core habitat areas subject to a budget constraint is introduced. The standard economic framework of maximizing habitat benefits subject to a budget constraint that we employ in this paper is a divergence from other recently proposed models that focus only on minimizing the cost of a single parcel-wide corridor. While the budget constrained optimization model that we introduce is intuitively appealing, it presents substantial computational challenges above determining...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6207

Öffentliche Wahrnehmung der Primärverantwortung für Lebensmittelsicherheit: Eine Medienanalyse der Gammelfleischskandale
Provedor de dados: 31
Autores: Schulze,   Holger; Bohm,   Justus; Kleinschmit,   Daniela; Spiller,   Achim; Nowak,   Beate.
At the beginning of the year 2005 the German meat industry frequently appeared in the media with reports about rotten meat. Since then a huge number of new problems with meat have arisen which have disclosed weaknesses in food quality control and highlighted the extremely sensitive nature of the subject in the meat sector. Contrary to the BSE crisis after which private control systems were strengthened, the “rotten meat scandals” led to more state control. Hence, no clear political direction is perceptible as to whether primary responsibility for food safety should lie with the state or with the industry. The following contribution examines this question with regard to the presentation of this subject in the media. It is based on the content analysis of...
Tipo: Journal Article
Palavras-chave: Media analysis; Primary responsibility for food safety; Quality assurance; Rotten meat; Food Consumption/Nutrition/Food Safety.
Ano: 2008
URL: http://purl.umn.edu/97703

NON-EMPLOYMENT BENEFITS AND THE EVOLUTION OF WORKER-EMPLOYER COOPERATION: EXPERIMENTS WITH REAL AND COMPUTATIONAL AGENTS
Provedor de dados: 31
Autores: Pingle,   Mark; Tesfatsion,   Leigh.
Experiments with real and computational agents are used to examine the impact of changing the level of a non-employment payoff on the evolution of cooperation between workers and employers participating in a sequential employment game with incomplete contracts.  Workers either direct work offers to preferred employers or choose unemployment and receive the non-employment payoff.  Subject to capacity limitations, employers either accept work offers from preferred workers or remain vacant and receive the non-employment payoff.  Matched workers and employers participate in an employment relationship modeled as a prisoner's dilemma game.  In both types of experiments, increases in the non-employment payoff result in higher unemployment and vacancy rates while...
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital.
Ano: 2001
URL: http://purl.umn.edu/18190

Economic Reason for Cultivated Land Circulation
Provedor de dados: 31
Autores: Liu,   Yang; Liu,   Huijun.
Characteristics of interest subjects in land circulation market of rural China are introduced, which are land supplier (peasant household) and requester (large household). It is pointed out that due to the poor management capacity and market adaptability, peasant household may rent some or all the contracted land in the form of subcontract if someone is willing to offer a higher rent. Having high comprehensive quality, large households may introduce new agricultural technology on time. They are good at operating efficient agriculture and scale agriculture and have strong market adaptability and business decision-making skill. Through establishing the cost-benefit function, cost benefit of rural land circulation subject is analyzed and the economic reason...
Tipo: Thesis or Dissertation
Palavras-chave: Cultivated land circulation; Economic reason; Interest subject; Cost benefit; China; Land Economics/Use.
Ano: 2009
URL: http://purl.umn.edu/58453

Effects of Reducing the Income Cap on Eligibility for Farm Program Payments
Provedor de dados: 31
Autores: Durst,   Ron L.
The current $2.5-million income cap on eligibility for farm program payments affects only a small number of farm program payment recipients each year. A reduction in the cap to $200,000 would affect a larger number of farm households but still only a small share of recipients. Based on IRS tax data for 2004, about 1.2 percent of all farm sole proprietors and about 2 percent of crop share landlords would be potentially subject to the proposed lower adjusted gross income (AGI) cap. ARMS survey data suggest a similar share of farm sole proprietors (1.1 percent) could be affected. When partnerships and farm corporations are included, about 1.5 percent of all farm operator households could be affected because a larger share of farm partnerships (2.5 percent)...
Tipo: Report
Palavras-chave: Farm program payments; Adjusted gross income; Farm typology; Tax data; AGI cap; Farm households; Agricultural Resource Management Survey; Farm Management.
Ano: 2007
URL: http://purl.umn.edu/59027

Effects of temperature and volume of water on the growth and development of tadpoles of Pleurodema diplolister and Rhinella granulosa (Amphibia: Anura)
Provedor de dados: 103
Autores: Maciel,Thely A.; Juncá,Flora A.
The capacity of tadpoles to reduce their metamorphosis time and body size in response to fluctuations in environmental variables of temporary ponds has been recorded in field and laboratory studies. The main alterations in this habitat are related to the decrease of the water level and increase in temperature. However, few studies tried to dissociate the effect of these two variables. The aim of the present study was to analyze simultaneously the effects of water volume reduction and temperature on the development and growth in tadpoles of Pleurodema diplolister (Peters, 1870) and Rhinella granulosa (Spix, 1824) - species that use temporary ponds for reproduction. The tadpoles of these two species were subject to four treatments: (1) constant volume of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bufonidae; Leiuperidae; Temporary ponds.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300005

Phylogenetical inferences of five isolates of swine Leptospira based on 16s and secy genes
Provedor de dados: 195
Autores: Bastos, C. R.; Marulanda, N. D. F.; Jaeger, L. H.; Miranda, V. F. O.; Lilenbaum, W.; Mathias, L. A.
Leptospirosis is a zoonosis responsible for economic and health damages in swine herds. The cultivation and typing of leptospira strains present in one region are still an important subject for disease control.
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/38008

The long and successful journey of electrochemically active amino acids. From fundamental adsorption studies to potential surface engineering tools.
Provedor de dados: 42
Autores: DOURADO,ANDRÉ H.B.; PASTRIÁN,FABIÁN C.; TORRESI,SUSANA I. CÓRDOBA DE.
ABSTRACT Proteins have been the subject of electrochemical studies. It is possible to apply electrochemical techniques to obtain information about their structure due to the presence of five electroactive amino acids that can be oriented to the outside of the peptidic chain. These amino acids are L-Tryptophan (L-Trp), L-Tyrosine (L-Tyr), L-Histidine (L-His), L-Methionine (L-Met) and L-Cysteine (L-Cys); their electrochemical behavior being subject of extensive research, but it is still controversial. No spectroscopic investigations have been reported on L-Trp, and due to the short life time of the intermediates, ex situ techniques cannot be employed, leading to a never-ending discussion about possible intermediates. In the L-Tyr and L-His cases,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Protein electro-oxidation; Electrochemical active amino acids; L-Cysteine; SAM; Cu2O; Low index facets nanoparticles.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000200607

Daily practices, consumption and citizenship
Provedor de dados: 42
Autores: Mazzarino,Jane M.; Morigi,Valdir J.; Kaufmann,Cristine; Farias,Alessandra M.B.; Fernandes,Diefersom A.
This paper promotes a reflection on the relationship between daily practices and consumption. Understanding how conflicts, resistance and consensus are generated from daily consumption practices opens up possibilities for reflecting on the construction of sustainability in the context of diversity, one of the landmarks of the globalized world. Within this socio-cultural context, the central issue is: can consumption generate citizenship practices? The concepts of subject and agent help one think about collective action and subjectivation processes and their interferences on the collective consuming behavior. Based on empirical data from a research carried out in the municipality of Estrela in 2007, in the Taquari Valley - Rio Grande do Sul (Southern...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Consuption; Daily life; Environental practices; Citizenship; Social representations.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400033

Um esquema geral para a discussão do movimento de materiais para as células vivas e tecidos
Provedor de dados: 43
Autores: Broyer,T. C.; Malavolta,E.
A generalized comprehensive scheme concerning the movement of materials into living cells and tissues is presented. It is designed for use by investigators and teachers who, is assumed, have a previous knowledge of the subject as well as familiarity with previously published literature on the subject. Footnotes to figure 2 X = a constituent component material, arising from extermal sources or through metabolism, capable of migration under favorable conditions. e, i, ec, ic, mc = subscripts indicating location. oC = oxidized cytoplasmic constituents specifically concerned in unidirectional (here invardly directed), diffetial translocation of a particular material X. rC = reduced cytoplasmic constituents specifically concerned. XF = specific free energy (2)...
Tipo: Info:eu-repo/semantics/article
Ano: 1953
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761953000100013

Use of Inert Gases for the Preservation of Nuclear Blood Cells
Provedor de dados: 52
Autores: Khudyakov,Andrey Nikolaevich; Polezhaeva,Tatyana Vitalyevna; Zaitseva,Oksana Olegovna; Sergushkina,Marta Igorevna; Solomina,Olga Nurzadinovna.
Abstract The subject of the study was the stability of human white blood cell membranes subject to noble gases (xenon ad krypton, 0.6 mPa) clathrate cryoanabiosis (‒80°C). A unique portable stainless steel low pressure container with a compartment for flexible plastic container was designed to ensure that the cells are saturated with gases. The samples were warmed after 1 and 30 days in a water bath (+38°C) for 35-50 sec, while the container was being tilted (2-3 times per second), until the temperature of the biological object reached +3±1°C. It was demonstrated that after 30 days of clathrate anabiosis (-80°C) over 95% (of the original number) of leukocytes remain viable, and cell membranes of 54.5±3.4% of them is resistant to trypan blue; granulocyte...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clathrates; Cryopreservation; Xenon; Krypton; Leukocytes.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100404

Flow cytometry protocol to evaluate ionizing radiation effects on P-glycoprotein activity
Provedor de dados: 52
Autores: Santos,Neyliane Gonçalves dos; Amaral,Ademir; Cavalcanti,Mariana Brayner; Neves,Maria Amélia Batista; Machado,Cíntia Gonsalves de Faria.
The aim of this work was to establish a protocol to evaluate ionizing radiation effects on P-glycoprotein (P-gp) activity. For this, human peripheral blood samples were irradiated in vitro with different doses and P-gp activity was analyzed for CD4 and CD8 T lymphocytes through rhodamine123-efflux assay by flow cytometry. By simultaneous employment of percentage and mean fluorescence index parameters, subject-by-subject analysis pointed out changes in P-gp activity for some individuals and irradiated samples. Based on this work, the proposed protocol was considered adequate for evaluating P-gp activity on cells after radioactive stress. Besides, this research suggests that P-gp activity could be an important factor to define patient-specific protocols in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Combined therapy; Radiation effect; P-glycoprotein; Multidrug resistance; Functional analysis; Flow cytometry.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000700018

Regulation of the kinin receptors after induction of myocardial infarction: a mini-review
Provedor de dados: 56
Autores: Tschöpe,C.; Heringer-Walther,S.; Walther,T.
It is well known that the responses to vasoactive kinin peptides are mediated through the activation of two receptors termed bradykinin receptor B1 (B1R) and B2 (B2R). The physiologically prominent B2R subtype has certainly been the subject of more intensive efforts in structure-function studies and physiological investigations. However, the B1R activated by a class of kinin metabolites has emerged as an important subject of investigation within the study of the kallikrein-kinin system (KKS). Its inducible character under stress and tissue injury is therefore a field of major interest. Although the KKS has been associated with cardiovascular regulation since its discovery at the beginning of the last century, less is known about the B1R and B2R regulation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: B1 receptor; B2 receptor; Bradykinin; Heart infarction; Kallikrein-kinin system.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000600011

De abril a diciembre : el recurrente simulacro de la reforma política  (Coyuntura)
Provedor de dados: 122
Autores: Muñoz López, Pabel.
Las promesas de refundación del país, luego de la caída de Gutiérrez, se han plasmado en una estrategia confusa y zigzagueante. Los fallidos intentos por llevar adelante una reforma política muestran, una vez más, que este tema no pasa de ser más que un simulacro, un “mito”, que permite a los gobernantes mantener intacto el sistema político ecuatoriano. Estos meses de nuevo gobierno muestran que el discurso de la “ingobernabilidad” en el país ubica el problema en el objeto de gobierno más no en el sujeto que gobierna; han mostrado que el desgobierno es una estrategia en la que se administra pero no se gobierna.
Tipo: Artículo
Palavras-chave: REFORMA POLÍTICA; DESGOBIERNO; PUGNA DE PODERES; ECUADOR; POLITICAL REFORM; NON-GOVERN; STRUGGLE OF POWERS; ASAMBLEA NACIONAL CONSTITUYENTE -- ECUADOR.
Ano: 2006
URL: http://hdl.handle.net/10469/691

Evaluation of antifungal activity of seaweed extracts
Provedor de dados: 64
Autores: Peres,Julio Cesar Fernandes; Carvalho,Luciana Retz de; Gonçalez,Edlayne; Berian,Luis Otávio Saggion; Felicio,Joana D´arc.
Seaweeds are subject to numerous biological interactions and sometimes to extreme abiotic conditions, so they have developed among other defense mechanisms, the ability to produce biologically active substances. Thus, these organisms produce mainly terpenes and phenols. Among others, the antifungal activity, due to its importance in human and animal health and the production of agricultural products, has been the subject of several studies. In the present work, this activity was investigated in ten seaweeds extracts, by direct bioautography assays, compared to Colletotrichum lagenarium and disk diffusion assay, compared to Aspergillus flavus. The organisms studied were: Stypopodium zonale, Laurencia dendroidea, Ascophyllum nodosum, Sargassum muticum,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Etanolic extract; Colletotrichum lagenarium; Aspergillus flavus.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300004

Micronutrientes no solo sob diferentes fitofisionomias no Pantanal da Nhecolândia, Mato Grosso do Sul.
Provedor de dados: 14
Autores: FREITAS, D. A. F. de; CARDOSO, E. L.; SILVA, M. L. N.; SANTOS, S. A.
O Pantanal da Nhecolândia é caracterizado por uma elevada diversidade de unidades de vegetação que apresentam diferenças na fertilidade do solo. O presente estudo objetivou avaliar a disponibilidade de micronutrientes do solo sob as diferentes fitofisionomias desta região. Amostras de solo foram coletadas na profundidade de 0-10 cm, para avaliação da disponibilidade de zinco, ferro, manganês, cobre, boro e sódio, em sete fitofisionomias sujeitas a diferentes regimes de inundação: a) livres de inundação - floresta semidecídua e cerradão; b) sujeitas a inundação ocasional ? cerrado/campo cerrado e campo limpo com predominância de Elionurus muticus; c) sujeita a inundação sazonal - campo limpo com predominância de Axonopus purpusii e Andropogon spp.; bordas...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: PH do solo; Native vegetation.; Matéria Orgânica; Vegetação Nativa.; Organic matter; Soil pH.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/921423

Input output accounting systems in the European community - an appraisal of their usefulness in raising awareness of environmental problems
Provedor de dados: 21
Autores: Goodlass, G.; Halberg, N.; Verschuur, G.
Input Output Accountingsystems (IOAs) can be used to identify farming practices which are not ‘environmentally neutral’ and thus unlikely to be sustainable in the long term. In an EU sponsored project, European countries were surveyed and over 50 farm level IOAs identified. The subjects covered by the IOAs included nutrients, pesticides, energy, soil/habitat, conservation, wastes (e.g.packagingandtyres)and other items such as veterinary products. Nearly half the IOAs covered more than one subject and nutrient budgets were the most commonly included(91% of the IOAs studied). Looking at the 30 single subject systems, most (26)were nutrients with only three pesticide and one energy based system. In total 50 systems covered nutrients. Overall, where specified,...
Tipo: Journal paper
Palavras-chave: Environmental aspects.
Ano: 2003
URL: http://orgprints.org/15566/1/15566.pdf

Market Access
Provedor de dados: 31
Autores: Jales,   Mario; Josling,   Timothy E.; Nassar,   Andre Meloni; Tutwiler,   M. Ann.
The negotiation of improved market access in agriculture is crucial to the success of the Doha Round. The depth of tariff cuts will be the main indication of the level of ambition of the agricultural talks and hence the Round as a whole. Agricultural tariffs remain five times higher than tariffs in industrial goods, and account for the bulk of the distortions in agricultural trade.  Recent analysis indicates that 92 percent of the global gains from trade liberalization in agriculture result from removing market access barriers.  The July Framework reaffirmed the objective of substantial improvements in market access. This is to be accomplished by a single approach, a tiered (or banded) formula for tariff cuts, with the higher tariff rates being subject to...
Tipo: Report
Palavras-chave: International Relations/Trade.
Ano: 2005
URL: http://purl.umn.edu/14570

The Challenge of Collecting and Using Environmental Monitoring Data
Provedor de dados: 7
Autores: Biber, Eric; University of California, Berkeley; ebiber@law.berkeley.edu.
The monitoring of ambient environmental conditions is essential to environmental management and regulation. However, effective monitoring is subject to a range of institutional, political, and legal constraints, constraints that are a product of the need for monitoring to be continuous, long lived, and well matched to the resources being studied. Political pressure or myopia, conflicting agency goals, the need for institutional autonomy, or a reluctance of agency scientists to pursue monitoring all may make it difficult for ambient monitoring to be effectively undertaken. Even if effective monitoring data is gathered, it may not be used in decision making. The inevitable residual uncertainty in monitoring data allows stakeholders to contest the use of...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Environmental law; Monitoring; Uncertainty.
Ano: 2013

Equipment design for biosorption studies with microorganisms
Provedor de dados: 69
Autores: Jensen,Thomas E; Crang,Mary C; Crang,Richard F.E.
Two laboratory devices have been designed for experimental use in biosorption studies involving the uptake and controlled release of elements from encapsulated living cells of microorganisms. The first device is an alginate bead maker capable of producing uniform (1.5 mm diameter) sodium alginate beads with encapsulated microorganisms. The second device is a flow-cell that can subject the encapsulated microorganisms to changing fluids, streaming gaseous microaerophyllic conditions, and which also allows for samples of fluid and beads to be extracted at any time during changing experimental conditions. Both devices are novel and simple in their design, and enable improved accuracy and precise handling of encapsulated specimens with minimal labour and...
Tipo: Journal article
Palavras-chave: Bead maker; Biosorption; Flow-cell; Sodium alginate.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000400014

A note on the population genetic consequences of delayed larval development in insects
Provedor de dados: 74
Autores: Salles,Marcos Mattoso de; Otto,Paulo A.
Observations by Dobzhansky's group in the 1940s suggesting that the presence of recessive genotypes could account for lower larval developmental rates in Drosophila melanogaster were not confirmed at the time and all subsequent investigations on this subject focused on the analysis of ecological models based on competition among pre-adult individuals. However, a paper published in this journal in 1991 eventually confirmed the finding made by Dobzhansky and his co-workers. In this report, we provide a theoretical analysis of the population genetic effects of a delay in the rate of larval development produced by such a genetic mechanism.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Difference and differential equations; Drosophila; Dynamic systems; Larval development; Population genetics.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300019

Teaching evolutionary biology
Provedor de dados: 74
Autores: Tidon,Rosana; Lewontin,Richard C.
Evolutionary Biology integrates several disciplines of Biology in a complex and interactive manner, where a deep understanding of the subject demands knowledge in diverse areas. Since this knowledge is often inaccessible to the majority of specialized professionals, including the teachers, we present some reflections in order to stimulate discussions aimed at the improvement of the conditions of education in this area. We examine the profile of evolutionary teaching in Brazil, based on questionnaires distributed to teachers in Secondary Education in the Federal District, on data provided by the "National Institute for Educational Studies and Research", and on information collected from teachers working in various regions of this country. Issues related to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Education; Evolutionary biology; Misconception; Teaching.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100021

Susceptibility of Brazilian varieties of maize and upland rice to Striga (Striga asiatica).
Provedor de dados: 14
Autores: MIRANDA, C. H. B.; FAVARO, S. P.
This communication registers authors' impressions on the parasitism of Striga (Striga asiatica (L.) Kuntze) in Brazilian varieties of maize and dryland rice that were introduced in Mozambique. It was a rare opportunity to learn about this plant parasite in its native habitat, as it does not naturally occur in Brazil, although ecological conditions are favorable for its development. It is an important quarantine plant rigorously checked out of the country, because of the risks it poses to extensive Brazilian pasturelands and cereal cropland. We hope this report calls the due attention and helps to build up knowledge on the subject.
Tipo: Folhetos
Palavras-chave: BRS 2022; BRS 2043; BRS Sertaneja; BRS Primavera; BRS Pepita; BRS Serra Dourada; BRS Esmeralda; Arroz Sequeiro; Milho; Variedade; Parasito de Planta; Rice; Striga asiatica; Varieties; Parasitic plants.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1136934

The Flood in the Black Sea - Science and Mythology
Provedor de dados: 5
Autores: Dimitrov, P; Ryan, W; Ballard, R; Haarmann, H; Dimitrov, D; Solakov, D; Slavova, K; Peev, P; Peychev, V; Petrov, P; Lericolais, Gilles.
The most recent geological history of the Black Sea, which covers the last 25 thousand years, is a subject of special attention today. This interest is due mainly to the hypothesis we have launched about the early Holocene flood in the Black Sea. This hypothesis was a real shock to the scientific community, among whom the Bulgarian geologists and archaeologists received it with great hostility. The anathematization was accompanied by a fierce media campaign, as a result of which Prof. Robert Ballard, the discoverer of Titanic, left Bulgaria disappointed.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-4934.pdf

Technical paper on Toxicity Equivalency Factors for Marine Biotoxins Associated with Bivalve Molluscs
Provedor de dados: 5
Autores: FAO/WHO.
World bivalve molluscs production (capture + aquaculture) has been increasing substantially in the last fifty years, going from nearly one million tonnes in 1950 to about 15 million tonnes in 2012. Being filter feeders, bivalves utilise natural plankton and detritus as feed and do not require artificial feeds. But this filter feeding nature is also the reason for the requirement of strict environmental hygiene to produce bivalves safe for human consumption. They tend to concentrate microorganisms, toxins and chemicals from the environment and therefore, their safety management requires stringent sanitary measures to ensure consumer protection. Following the request of Codex Committee on Fish and Fishery Products (CCFFP), FAO/WHO agreed to develop a...
Tipo: Text
Palavras-chave: Toxicity; Shellfish; Risk assessment; Fisheries; Fishery products; Consumer protection; Food safety; Aquatic environment.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47124/47058.pdf

Courants residuels de maree dans la Manche
Provedor de dados: 5
Autores: Salomon, Jean-claude; Breton, Marguerite.
A two-dimensional mathematical model of the Channel has been used to reveal tide-related advective physical structures, at synoptic time scales. Results show a complete circulation pattern composed of a nearly axial "river" carrying a water flux of about 27,000 m super(3)/s, for an average tide, from the Atlantic to the North Sea and lateral gyres of various intensities, linked to the topography. The modest velocity of the mean flow makes it probably subject to strong temporal modifications by meteorological forcings. Conversely, some strong gyres may play an important role on the residence time of particles and the local memorization of water mass characteristics.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00268/37883/35964.pdf

Reproductive variability in deep-sea echinoderms and molluscs from the Rockall Trough
Provedor de dados: 5
Autores: Tyler, P A; Gage, J D; Pain, S L.
Recent evidence from long-term monitoring of the deep sea suggest that conditions in this supposedly stable environment may be subject to seasonal forcing. For example, measurements both of flux of particles from the surface and in the velocity of bottom currents suggest seasonal fluctuations occur at the benthic boundary to which the reproductive activity of benthic populations of certain species of echinoderm and bivalve molluscs may be attuned. The small egg size and high fecundity of species showing seasonal periodicities in reproduction suggests planktotrophic development. Larval development occurs in the early part of the year, suggesting that flux of organic particulates from surface production may be an ultimate selective factor for the...
Tipo: Text
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00247/35791/34304.pdf

The economic development of the French fisheries : the major trends of supply and demand
Provedor de dados: 5
Autores: Foucault, Francois.
In the context of an economic crisis with the recession in 1993 and a fall-off in demand, the combination, in the beginning of 1993 and 1994, of the following eventsled to a drop in prices which triggered off a social faintness in the French fishing industry, e.g. the adjustment of exchange rates, the reduction in air-freight tariffs, etc... The problem is not so much about the significance of the short term drop  inprices - which is usual at this time of the year- but about the long term trends whichthis sector has been subject to for decades. Beyond the resource's biological constraints, the 1975 difficulties of French fisheries have revealed their vulnerability and dependence on the market of competitive agricultural products, the international market...
Tipo: Text
Palavras-chave: SEM.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/acte-4016.pdf

Bar codes in fisheries research: development of the "ichthyometer"
Provedor de dados: 5
Autores: Morizur, Yvon; Ogor, Andre; Lespagnol, Patrick.
A patent was registered in 1991 for using bar codes to make up fish measuring board. Collection of data such as the length of the captured fish and sometimes their ages are required in order to manage fishery resources. It is a time-consuming operation as this work is usually carried out throughout the year for each species. The computerization of this phase has been the subject of much research work. Electronic fish measuring boards have been developed in Scotland, Canada, and Spain but they have not spread for a number of reasons. Going beyond these developments, IFREMER designed a more efficient and new open-ended fish measuring system - the ichthyometer - which features higher flexibility by using the bar code principle
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-2347.pdf

Effluents from land based marine farms: nature, treatment, valorisation, modelisation. Applications to fish and shrimp rearing
Provedor de dados: 5
Autores: Hussenot, Jerome; Lefebvre, Sebastien; Martin, Jean-louis.
Fish culture (seabass, turbot...) on the French metropolitan coast, and shrimp culture in the overseas territories (essentially New Caledonia and Tahiti) are subject to a regular development through land based farms. Three thematic of research on aquaculture ponds are carried out in CREMA-L’Houmeau, in collaboration with producers. The aim of the first one is to determine the optimal rearing conditions (stocking density, water renewal rate, input of oxygen, rate of feeding...) which allow to minimise the quantity of wastes for a similar final biomass. The second part aims to reduce the nutrient loading in the effluent, through open-air treatments: sedimentation ponds, foam fractionation, mass production of phytoplankton, and rearing of molluscs on the...
Tipo: Text
Palavras-chave: Fish; Shrimp; Pond management; Effluents; Treatment.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00016/12728/9650.pdf

Temporal Changes in the Diversity of Shelf-sea Fish Communities
Provedor de dados: 5
Autores: Collie, Jeremy; Rochet, Marie-joelle.
The North Sea and Georges Bank fish communities have lost species and size diversity over the past several decades. Hypotheses that may explain these changes include climate change that may induce shifts in the food web, historical and contemporary fishing pressure and selective fishing of certain species or sizes. We use a comparative approach to examine the support for these different hypotheses. Using standardized trawl-survey data, we identify the useful indicators of species diversity, and functional diversity as measured by changes in size structure and changes in functional groups. The North Sea and Georges Bank fish communities have much in common, including shared species and congeneric species. However, the communities are subject to different...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00029/13992/11172.pdf

Assessment of eutrophication of French Mediterranean lagoons in relation to meteorological interannual variability
Provedor de dados: 5
Autores: Malet, Nathalie; Derolez, Valerie; Laugier, Thierry; Munaron, Dominique; Fiandrino, Annie; Messiaen, Gregory; Fortune, Martine; Souchu, Philippe; Barral, Marc; Daloz, Aurélien; Moragues, Laurent.
Since recent decades, nutrient-related eutrophication, originating from agricultural use of fertilizer and population enhancement, can be considered worldwide as the main disturbance for coastal lagoons. Since coastal lagoons are very shallow and enclosed, their functioning is tightly linked to meteorological conditions. The aim of this study is to compare different rainfall levels and eutrophication response on coastal lagoons of the Languedoc-Roussillon (Western Mediterranean coast), subject to different nutrient loads from their watershed, in order to check the possibility to distinguish the effects of watershed management or rainfall conditions on water quality (waste water treatment plant improvement, decrease of fertilizer spreading).
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00008/11945/8651.pdf

Macrobrachium rosenbergii culture in Polynesia : pH control in experimental pond waters by phytoplankton limitation with an algicide
Provedor de dados: 5
Autores: AQUACOP.
Macrobrachium rosenbergii ponds at the Centre Océanologique du Pacifique are subject to increases in pH exceeding 10.5 during growing experiments. The high levels of pH are responsible for mortality of prawns, especially when molting. The photosynthetic activity of dense phytoplankton blooms are primarily responsible for high pH. The algicide Clarosan (CIBA-Geigy) was used to thin phytoplankton blooms. Experiments showed that treatments with 0.02 mg/liter result in a rapid fall in the pH. At this dose Clarosan is not deleterious to the prawns. [NOT CONTROLLED OCR]
Tipo: Text
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-4421.pdf

Anatomy of the Thoracic Wall, Axilla and Breast
Provedor de dados: 77
Autores: Macéa,José Rafael; Fregnani,José Humberto Tavares Guerreiro.
For adequate treatment of patients with breast cancer, mastologists should have a complete understanding of the anatomy of the thoracic wall, axilla and breast. However, the classical anatomical descriptions in textbooks make it difficult to gain full mastery of this subject, because the books usually deal with its elements separately. In an endeavor to resolve this difficulty, the present authors have conducted an extensive review, to describe the muscles, blood vessels and nerves of the thoracic wall and in the axilla that are of interest to mastologists. The axilla was described in detail, with emphasis on its limits, walls and contents, and highlighting the lymph nodes in this region. Finally, the anatomy of the breast and its topography, innervation,...
Tipo: Journal article
Palavras-chave: Thoracic wall; Axilla; Breast; Anatomy.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500030

Prediction of Stature According to Three Head Measurements
Provedor de dados: 77
Autores: Rexhepi,Agron M; Brestovci,Behlul.
Morphometry is a non-invasive method important to assess the size, proportions, and composition of the human body. Because the prediction is an important subject in almost all life sciences, the aim of this research was to find out the cephalofacial variables that may predict the body height. Three cephalofacial variables and the body height were measured on 288 adult male subjects of the Kosovo Albanian population, aged 18­35 years old. Using the procedures of regressive analysis we found that cephalofacial variables: head height, head circumferences, face height, significantly may predict body height, and in this way we derived the specific regression equation for estimation of the body height, based on these cephalofacial variables. The predicted body...
Tipo: Journal article
Palavras-chave: Morphometry; Cephalofacial variables; Stature; Regression analysis.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300055

Bizygomatic Width and its Association with Social and Personality Traits in Males
Provedor de dados: 77
Autores: Gabarre-Mir,Julián; Navarro-Pastor,José B; Gabarre-Armengol,Cristina; Estaún-Ferrer,Santiago.
This study will examine how differences in measurements between bizygomatic and bigonial arches of the human face can provide relevant information regarding personality and abilities of the subject. Sample: 82 males. Group A: 55 subjects with the bizygomatic arch in contraction. Group B: 27 subjects without the bizygomatic arch in contraction. Subjects performed self-assessment tests in the following areas: ability incorporating themselves into the group, alexithymia and emotional expressiveness. Group A showed greater self-sufficiency and independence than group B, greater difficulty in describing and verbally expressing their emotions, less ability to express themselves emotionally through other forms of communication and reduced willingness to cooperate...
Tipo: Journal article
Palavras-chave: Bizygomatic width; Craniofacial; Personality; Alexithymia; Prospective ex post facto study.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300036

Morphometric Study on the Tibial Collateral Ligament
Provedor de dados: 77
Autores: Ranade,Anu Vinod; Rai,Rajalakshmi; Prabhu,Latha Venkatraya; Kumaran,Mangala; Kumar,Arunachalam.
Tibial collateral ligament by virtue of its length, composite attachments, and biomechanical exertions is more prone to lesions. A systematic analysis of the dimensions and variations of this ligament has been presented in this article. With the decrease emphasis on anatomy as a preclinical subject and recent successful moves to curtail total teaching hours for dissection, coupled with the increasing shortage of cadavers, data of this nature will in our opinion becomes scarce progressively. With these factors in context, and attempt is made to record the gross morphological features of the ligament from a series of dissections
Tipo: Journal article
Palavras-chave: Tibial collateral ligament; Anatomy.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500026

Ecotoxicology and Testicular Damage (Environmental Chemical Pollution): A Review
Provedor de dados: 77
Autores: Bustos-Obregón,Eduardo; Hartley B,Ricardo.
This review briefly considers the testicular damage elicited by environmental chemical pollution. It includes a short comment on environmental toxicology as an introduction to environmental chemical pollution, highlighting the importance of this current field of study and its impact on male reproductive health. Furthermore an experimental animal model addressing the effect of organophosphorated agropesticides as a testicular toxicant is presented. Moreover two relevant chemical contaminants and their effect on the testis, such as the classical case of lead and the rarely reported case of Boron on spermatogenesis, are considered. Additionally, the subject of biosentinel species and their relevance for the monitoring of pollution in aquatic and/or...
Tipo: Journal article
Palavras-chave: Environmental chemical pollution-testicular damage.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400009

How to Evaluate and Interpret a Scientific Article About Therapy Or Therapeutic Procedures?
Provedor de dados: 77
Autores: Otzen,Tamara; Manterola,Carlos; García-Domínguez,Maricela.
Regardless of the subject area and design used, it has been verified that between 40% and 60% of the studies published in biomedical journals are articles about therapy or therapeutic procedures (TP). Anyone writing a manuscript related to therapy or TP or reading an article of this type must demand at the very least a clear, precise and concise objective with respect to the research conducted, explicit mention of the design used with the respective inherent methodological details, and the mention and execution of statistical tools and the measures of association, or at least the numbers needed to calculate these values. The aim of this manuscript is to present a synthesis of the fundamental elements for the correct writing, reading and assessment of such...
Tipo: Journal article
Palavras-chave: Therapeutics; Therapy; Subheading; Risk; Clinical Trial; Publication Type; Cohort Studies; Meta-Analysis; Publication Type.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200061

Effects of Sensory Stimuli on Postural Control: a Tetraplegic Case Report
Provedor de dados: 77
Autores: Gatica R,Valeska; Elgueta C,Edith; Valdés M,Ramón.
During sessions of physical therapy, a tetraplegic patient with incomplete spinal cord section at C5 level was found to have changes in the posture post intervention. The therapy consisted of tactile stimulation in specific points of his body to genérate reflex patterns of muscle activation (Vojta therapy principies). To quantify these postural changes in the subject, the center of pressure displacement in sitting posture was measured. An analysis of the changes observed in postural control through fourteen months of follow-up is presented and discussed in the report bellow.
Tipo: Journal article
Palavras-chave: Specific manual press stimulus (SMPS); Static posturographic platform; Postural control.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400004

An epidemiological review of scorpion stings in Venezuela: the Northeastern region
Provedor de dados: 79
Autores: DE SOUSA,L.; PARRILLA-ALVAREZ,P.; QUIROGA,M.
In Venezuela, the restricted manner of works on scorpion envenoming has contributed little to the real magnitude and knowledge of this subject in our country. The lack of basic scorpiofauna knowledge, distribution, clinical manifestations, and especially of specific treatments justify multidisciplinary studies. The purpose of these studies is to obtain information that allows the elaboration of a preventive plan. This paper demonstrates the magnitude of scorpion envenomings in Venezuela.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scorpionism in Venezuela; Tityus sp.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000200002

Review
Provedor de dados: 16
Autores: Nooteboom, H.P.
This volume includes over 10,000 citations to literature published during the last ten years about plant conservation at all levels, local, national, and international. Its scope ranges from highly specific papers on individually threatened plant species to more general papers tackling conservation strategy, policy, and law. Reference citations are grouped into three sections, General, Regional, and Country. For the larger countries also followed by state or province. Each citation is numbered in the left-hand column, making it easy to find specific references using the subject indices given at the end of the book (an index on plant names, one on families, and a geographical index).
Tipo: Article / Letter to the editor
Ano: 1991
URL: http://www.repository.naturalis.nl/record/525952

Caribbean tiger beetles of the genus Megacephala
Provedor de dados: 16
Autores: Wagenaar Hummelinck, P.
The small collection of tiger-beetles, belonging to the genus Megacephala, which is the subject of this paper, was incidentally made by the author during his visits to the Lesser Antilles in 1936-’37 and 1948-’49. The greater part of the material has been deposited at the “Zoologisch Museum” of Amsterdam and the “Rijksmuseum van Natuurlijke Historie” at Leiden. Some specimens (27 M. sobrina from Porlamar, Margarita, and Deenterra, Bonaire) were presented to the collections of the American Museum of Natural History, British Museum, Deutsches Entomologisches Institut, incl. Coll. Horn, Hope Department of Entomology at Oxford, The Imperial College of Tropical Agriculture in Trinidad, Institut Royal des Sciences Naturelles de Belgique at Brussel, United States...
Tipo: Article / Letter to the editor
Ano: 1955
URL: http://www.repository.naturalis.nl/record/506134

New species of Ascidian from the West Indies
Provedor de dados: 16
Autores: Millar, R.H.; Goodbody, Ivan.
The ascidian fauna of the West Indian region is relatively well known as a result of the work of VAN NAME (1902, 1921, 1930, 1945), BERRILL (1932), MILLAR (1962a) and VAN DER SLOOT (1969). During the past few years one of us has carried out extensive collecting in the coastal waters of Jamaica with a view to preparing a faunistic and ecological account of the ascidians of that island. In the course of this work a number of new species have been discovered, which are the subject of the present paper. In addition we propose that Halocynthia microspinosa (Van Name, 1921) be reinstated.
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/506045

Miscellaneous notes on New Guinea plants X
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van.
This remarkable rheophytic fern which is often massed in cracks of rocks in or near cascades in streams subject to sudden overflows had a peculiar distribution, being rather common in such habitats in Sumatra, Malaya, and Borneo, but also found on Mt. Salhutu in Ambon (Moluccas). It has recently also turned up in East New Guinea. EAST NEW GUINEA. Territory of New Guinea: West Sepik Dist., Telefomin Subdist., in Prospect Creek near Frieda R., 4°42' S, 14i°48' E, at 450 m, on large rocks in streambed (PH Creek), NGF 42540 E. E. Henty &amp; D. Foreman (A, BM, BRI, CANB, L, LAE).
Tipo: Article / Letter to the editor
Ano: 1971
URL: http://www.repository.naturalis.nl/record/526172

A list of species of Mammals from West-Sumatra and North-Celebes, with descriptionsof undescribed or rare species
Provedor de dados: 16
Autores: Jentink, F.A.
The Committee of the International Colonial Exhibition at Amsterdam has been kind enough to send to me a collection of Mammals made by Mr. F. von Feber during his residence in N. Celebes and W. Sumatra. The request was that I should subject the collection to a systematic review I feel sure that this review contains many facts interesting to zoologists, as it embraces certain very rare and partly unknown species and at the same time gives a very good idea of the peculiar Fauna of Celebes. The Mammals have been collected in the neighborhood of Loeboe Basong, Priaman, West-Sumatra, and in the vicinity of Amoerang, North-West-Celebes.
Tipo: Article / Letter to the editor
Ano: 1883
URL: http://www.repository.naturalis.nl/record/509370

A revision of Caltha (Ranunculaceae)
Provedor de dados: 16
Autores: Smit, Petra G.
The family of the Ranunculaceae, although a large one (ca. 1200 species) occurring almost throughout the world, is generally regarded as a very natural one. The only genera with a recently more or less disputed position are Circaeaster, Glaucidiutn, Hydrastis, Kingdonia, and Paeonia. The others may at present all be considered to be ‘true’ Ranunculaceae. Various botanists have studied the delimitation of these genera, their affinity and phylogenetic links. Their ideas are often widely divergent. There is no need to go into the subject here, but some opinions on the place in the system of Caltha may be reviewed.
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/534972

Scale insects from Dutch New Guinea
Provedor de dados: 16
Autores: Reyne, A.
New Guinea is next to Greenland the largest island in the world; its area is about 785000 sq. kilometers (with adjacent islands ca. 806000 sq.kms). It lies within the tropics, quite near the equator, and is largely covered by a luxuriant vegetation, so that a rich fauna of scale insects may be expected, though extremely little has been published on this subject. In FERNALD’S catalogue with supplements (1903—1915), and in the Zoological Record for the years 1915—1957, only 4 new species are reported from New Guinea, viz. Myxolecanium kibarae BECCARI (FERNALD No. 1005), Aulacaspis major RUTHERFORD, Ceroplastes murrayi FROGGATT, and Steatococcus samaraius MORRISON (Zool. Ree. 1916, 1919, and 1927).
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/504978

Review
Provedor de dados: 16
Autores: Leenhouts, P.W.
The kernel of this book consists of an enumeration of some 1600 publications of importance to the flora of the Mascarenes (East of Madagascar; main islands Réunion, Mauritius, Rodrigues), arranged alphabetically by author. Fairly often a short note is given on contents and importance. Counterpart to this enumeration is an extensive Subject Index which gives many different entries to the first part. The practical value of a book like the present one depends primarily on its completeness, secondarily on its selectivity. As to the first point, this is not easy to check. Comparison with the literature on some families the reviewer is acquainted with gave the impression that the enumeration is still (rather?) incomplete. Therefore, we may hope that future, ever...
Tipo: Article / Letter to the editor
Ano: 1993
URL: http://www.repository.naturalis.nl/record/525637

New records
Provedor de dados: 16
Autores: NN.
Family name, full name of taxon (incl. all authors), rough locality, date of collection, collector’s name and collection number, place(s) of deposit, previously known distribution, additional remarks, authority for the report. In a footnote the Foundation(s) from which grants were received may be mentioned. For examples see below. The Editors of the Bulletin disclaim any responsibility for possible misidentifications or superfluous records, these should be accredited to the correspondents who have reported them. We will moreover decide whether we will include a record or not depending on their significance as we see it. For the future the exact criteria for inclusion will be formulated after some experience with the subject.
Tipo: Article / Letter to the editor
Ano: 1989
URL: http://www.repository.naturalis.nl/record/532859

The urosome of the Pan- and Peracarida
Provedor de dados: 16
Autores: Knopf, F.; Koenemann, S.; Schram, F.R.; Wolff, C.
We have examined the caudal regions of diverse peracarid and pancarid malacostracans using light and scanning electronic microscopy. The traditional view of malacostracan posterior anatomy is not sustainable, viz., that the free telson, when present, bears the anus near the base. The anus either can occupy a terminal, sub-terminal, or mid-ventral position on the telson; or can be located on the sixth pleomere – even when a free telson is present. Furthermore, there is information that might be interpreted to suggest that in some cases a telson can be absent. Embryologic data indicates that the condition of the body terminus in amphipods cannot be easily characterized, though there does appear to be at least a transient seventh segment that seems to fuse...
Tipo: Article / Letter to the editor
Palavras-chave: Anus; Pancarida; Peracarida; Pleomeres; Proctodaeum; Teloblasts; Telson; Urosome; 42.74.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/210767

Expeditions and other fieldwork
Provedor de dados: 16
Autores: NN.
The Malayan Nature Society is organizing a Scientific Expedition to Belum on the Northern border of Perak with Thailand to take place for one year after about August, 1993. It is intended to prepare an inventory for biodiversity for the proposed National Park, not a general collecting trip. Specialists and other serious visitors are expected within a reasonable period to stay for an extended time to study a defined, limited subject and to prepare a report for the inventory as soon as possible. For further information please contact the Executive Secretary of the Society, Miss Lee Su Win, POB 10750, 50724 Kuala Lumpur, Malaysia.
Tipo: Article / Letter to the editor
Ano: 1993
URL: http://www.repository.naturalis.nl/record/533029

The birth of a Lycaon pictus L. in the Zoological Garden of Warszawa
Provedor de dados: 16
Autores: Zabinski, J.
It is notorious that the lycaon, the negro evil of plains, while by no means a declining race in Africa, has always been rare in Zoological Gardens. The reasons of this are twofold and closely interrelated. The animal presented some difficulties to rearing, readily perished and withal was not subject to reproduction in captivity and so there were no new born animals available for exchange between Zoological Gardens. Causes for the non resistance of lycaons under conditions of Europe are to be found less in climate differences between Europe and Africa — for the habitat of these plain animals to the South reaches far beyond the tropic of Capricorn — and so lycaons should not be excessively susceptibLe to the European climate and especially to temperature...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504248

Review of marine biological studies on the Guyana shelf
Provedor de dados: 16
Autores: Geijskes, D.C.
Until recently biological research in the sea off Suriname had not received much attention. There was no fishery in the open sea and there was no incentive to investigate this unknown world. But in the last twenty years, experiments have gradually led to serious study of the subject. Before the second world war, schooner fishing in the open sea to catch red snapper fish, as already carried out off (British) Guyana, was tried by the Curaçao Trading Company in Paramaribo, but this experiment was not a success. During the war, a study of the local fisheries became urgent, to find out how far Suriname was able to supply the people with protein food.
Tipo: Article / Letter to the editor
Ano: 1968
URL: http://www.repository.naturalis.nl/record/506288

Contribution to the knowledge of the Placentation of the Cape Goldmole (Chrysochloris)
Provedor de dados: 16
Autores: Lange, Dan. de.
Setting in order the literary inheritance of late prof. A. A. W. Hubrecht I found some interesting notes upon two series of seetions through young uterine swellings of Chrysochloris probably made bij Mr. Arthur Willey of Montreal. These notes directed my attention to the placentation of this insectivore. Therefore as prof. Max Weber asked my collaboration to the memorial number of „Bijdragen tot de Dierkunde” for Dr. Kerbert’s seventieth anniversary, I resolved, after cutting some more series of slightly older stage, to investigate this subject in order to come to some provisional conclusions. The Embryological Institute at Utrecht disposes of some ten uteri of Chrysochloris, five or six of which are pregnant, while the remaining are in virginal or...
Tipo: Article / Letter to the editor
Ano: 1919
URL: http://www.repository.naturalis.nl/record/503941

Symposia, congresses, societies, meetings
Provedor de dados: 16
Autores: NN.
Please submit your announcement to this Bulletin as early as possible! Several made here were received too late for interested readers to make use of. After the event please send a summary of the doings, and/or the Proceedings, if any. Settlement of aliens was the subject of a colloquium held at Paris by the Societe de Biogeographie in October 1982, entitled ”L’homme, facteur biogéographique’, now published in the C.R. des Séances de la Société, vol. 60 (1984) 1—72. Subjects were Buddleja at Paris, Acacia in the French Mediterranean, some marine algae, and reintroduction of menaced or vanished indigenous plant species in their original habitat for the benefit of conservation.
Tipo: Article / Letter to the editor
Ano: 1985
URL: http://www.repository.naturalis.nl/record/532976

Svenzea, a new genus of Dictyonellidae (Porifera: Demospongiae) from tropical reef environments, with description of two new species
Provedor de dados: 16
Autores: Alvarez, Belinda; Soest, Rob W.M. van; Rützler, Klaus.
The new genus Svenzea is created to group three sponge species from tropical reef environments of the Caribbean Sea and Indonesia: Pseudaxinella (?) zeai Alvarez, Van Soest &amp; Rützler, Svenzea cristinae n. sp. and S. devoogdae n. sp. The genus shows affinities with members of both Halichondrida and Haplosclerida but it is assigned to the family Dictyonellidae based on shared microanatomical and developmental features. The higher taxonomic position of Svenzea is a subject for future investigations.
Tipo: Article / Letter to the editor
Palavras-chave: Porifera; Demospongiae; Dictyonellidae; New genus; New species; Svenzea cristinae; Svenzea devoogdae.
Ano: 2002
URL: http://www.repository.naturalis.nl/record/534358

Fossil Proboscidea from the Malay Archipelago and the Punjab
Provedor de dados: 16
Autores: Hooijer, D.A.
CONTENTS Introduction............... 1 Fossil Proboscidea and the stratigraphy of the Pleistocene in Southeastern Asia. 3 Order Proboscidea............. 9 Suborder Elephantoidea.......................... 9 Family Elephantidae............ 9 Subfamily Stegodontinae........... 9 Stegolophodon stegodontoidesPilgrim)......... 9 Stegodon insignis (Falconer et Cautley)........ 13 Stegodon trigonocephalus Martin......... 17 Stegodon hypsilophus Hooijer.......... 86 Subfamily Elephantinae........... 89 Archidiskodon celebensis Hooijer......... 89 Archidiskodon planifrons (Falconer et Cautley)...... 92 Stegoloxodon indonesicus Kretzoi species inquirenda..... 104 Elephas hysudricus Falconer et Cautley........ 107 Elephas hysudrindicus Dubois.......... 110 Elephas...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22.
Ano: 1955
URL: http://www.repository.naturalis.nl/record/317737

Studies in West Malesian Piperaceae. I
Provedor de dados: 16
Autores: Chew, Wee-Lek.
Recently, while going through the old collections of Malesian, Australian, and Pacific materials of Piperaceae in connection with the study of the New Guinea species of this family, taxonomic problems that need clearing up were encountered. These are of such a diverse nature that it is best they are discussed separately in each species and not summarized here. This paper is the first of many which will be published seriatim as work on this difficult group progresses. As implied in the title, this series does not deal with New Guinea species which are the subject matter of another series. It is hoped that these contributions will pave the way for a comprehensive revision of the family in Malesia in which more than 400 species have been described or recorded.
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/525937

List of the Holothurians in the collection of the Leyden Museum
Provedor de dados: 16
Autores: Ludwig, Hubert.
The collection of Holothurians in the Leyden Museum was sent over to me with the request that I would subject them to a systematic revision. I undertook this task in the hope of being able at the same time by the aid of this material to make a step in advance with respect to their anatomy. Unfortunately in nearly all the specimens the intestines were so insufficiently preserved, that I was forced to limit myself to the identification of the species. This, however, was not superfluous, as the majority of the specimens were incorrectly named and as certain localities are not without interest for the question of geographical distribution. The collection of Holothurians in the Leyden Museum contains a total of 52 species (two of them being new), most of which...
Tipo: Article / Letter to the editor
Ano: 1882
URL: http://www.repository.naturalis.nl/record/509038

Onvruchtbaarheid, een vruchtbaar terrein van studie
Provedor de dados: 16
Autores: Gadella, T.W.J.
Since our knowledge concerning the time of fruiting of various Angiosperms is very limited, JACOBS (1969, 1970) recently recommended this subject to the attention of amateur-botanists. The present author is of the opinion that also attention should be paid to the study of the absence of ripe fruits. Various causes may be responsible for this aspect: spatial isolation of the sexes in dioecious species (Mercurialis perennis, Stratiotes abides), interspecific hybridization ( (Violahybrids), triploidy (a.o. Stellaria graminea) and predominance of vegetative reproduction (a.o. in Ranunculus ficaria and some strains of Potentilla anserina).
Tipo: Article / Letter to the editor
Ano: 1971
URL: http://www.repository.naturalis.nl/record/526438

The fauna of the Port Royal mangal, Kingston, Jamaica
Provedor de dados: 16
Autores: Alleng, Gerard P.
ALLENG, Gerard P., 1997. The fauna of the Port Royal mangal, Kingston, Jamaica. Studies Nat. Hist. Caribbean Region 73, Amsterdam 1997: 23-42. An analysis and a characterization are presented of the Port Royal mangrove fauna. The existing literature on the subject is extensively reviewed and a fauna list is given, comprising all species found in the area. A total of 314 species was recorded. The paper is intended to be a contribution towards an effective management of Caribbean mangals, through an understanding of the total fauna.
Tipo: Article / Letter to the editor
Palavras-chave: Jamaica; Conservation; Fauna list Port Royal mangal.; Mangrove ecology.
Ano: 1997
URL: http://www.repository.naturalis.nl/record/503183

Review
Provedor de dados: 16
Autores: Balgooy, M.M.J. van.
The recent surge of interest in plants growing over serpentine is reflected in a spate of papers on the subject, so much so that it is difficult to keep track of what has been published. The present volume is an attempt in that direction. Both editors can glory in a long career of research on serpentine plants. The term serpentine is often used to denote a wide range of ultramafic rocks which are characterized by high concentrations of toxic heavy metals (Cr, Co, Ni), high Fe and Mg and low Ca and Si concentrations. The vegetation growing on serpentine often shows a striking contrast with surrounding vegetations on different soils. The stature is mostly low, xeromorphic structures prevail and floristic diversity is usually low, although endemism may be...
Tipo: Article / Letter to the editor
Ano: 1993
URL: http://www.repository.naturalis.nl/record/526162

Quinze années de recherches sur la zonation des cours d’eau: 1963-1978. Revue commentée de la bibliographie et observations personnelles
Provedor de dados: 16
Autores: Botosaneanu, L.
The paper published 1963 by Illies &amp; Botosaneanu on “Problems and methods of the classification and ecological zonation of running waters”, has attracted the attention of many hydrobiologists working on running waters; rather many of them used the system of longitudinal (vertical) zonation in their own studies, or/and critically discussed this method. An attempt is here made to critically review almost the entire bibliography on the subject published these last 15 years (about 50 titles). This review shows that meanwhile the theory of zonation has significantly developed, that it has vigorously stimulated research and discussion in different parts of the world, and that it is partly responsible for the progress achieved these last years by the...
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/504492

Expeditions and other fieldwork
Provedor de dados: 16
Autores: NN.
Borneo — Sabah — WWF Malaysia has obtained funding from the ASEAN Regional Centre for Biodiversity Conservation (ARCBC) to conduct botanical studies at Ulu Padas, in the extreme southwest of Sabah. A first expedition was carried out in April 2002 to the Maligan Virgin Jungle Reserve with a total area of 9240 ha, located 300 km S of Kota Kinabalu at 1220-1940 m altitude. It is subject to seasonal flooding as it is within a shallow sandstone basin. The Reserve is mainly made up of montane forest and still undisturbed. The montane marsh peat swamp forest/community there is very special and does not occur anywhere else in Sabah or Borneo.
Tipo: Article / Letter to the editor
Ano: 2002
URL: http://www.repository.naturalis.nl/record/532923

Reviews
Provedor de dados: 16
Autores: Jacobs, M.
ASHTON, P.S., Crown characteristics of tropical trees. In Tomlinson &amp; Zimmermann (ed.), Tropical Trees as Living Systems (1978) p. 591-615, 8 fig. An important subject in relation to bioproduction. Approaches are through Leaf Area Index (the area of leaf surface above a unit area of ground) and Leaf Area Density (ditto per volume of space). Field work was done in Malaya by students; the simple methods are described. Macaranga gigantea is compared with Musanga cecropioides; other pioneer species are quite different, however. Two profile diagrams of secondary forest are given. Crowns are modified in competition, as reflected in LAI and LAD. Plagiotropic branching allows trees to broaden quickly. Light- or shadepreference is not clearly correlated to...
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/533254

Phylogeny and biogeography of the Niphargus transitivus group of species (Crustacea, Amphipoda)
Provedor de dados: 16
Autores: Sket, Boris; Notenboom, Jos.
The Niphargus transitivus group includes 12 groundwaterdwelling species. It is defined by an upright body position during locomotion, a small, stout body with short appendages, except for long coxae and dactyli, coxae V-VI equilobate or posterolobate, accessory flagellum subject to reduction, and the body endowed with adaptations for volvation ( = ability to enroll into a ball). The biogeography of this southeastern European group of species is discussed and a cladistic analysis of the group is presented. Some cases of parallel character evolution in groundwater amphipods are mentioned. The inference of biogeographic and phylogenetic information in elucidating the evolutionary history of the group is hampered by inconsistency of the data. One of the...
Tipo: Article / Letter to the editor
Palavras-chave: Amphipoda; Niphargus; Phylogeny; Zoogeography.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/504275

Traces of ancient Dichotomies in angiosperms. (A contribution to our Knowledge of Phyllospory and Stachyospory)
Provedor de dados: 16
Autores: Hammen, L. van der.
It is a generally accepted concept nowadays that dichotomy is the most primitive type of ramification in land plants. Recently Lam (1948) briefly reviewed the literature of this subject in the light of the telome theory. He recalled that the dichotomies of fern leaves are to be regarded as homologous to the dichotomies of stems in more primitive plants and enumerated a number of more or less haphazardly collected cases in higher plants, of which the most probable interpretation is that they are traces of such ancient dichotomies, betraying their original relation to a branch system. In his paper, Lam discriminated between such traces in vegetative and in reproductive parts and he arrived at the provisional conclusion that traces of ancient dichotomies in...
Tipo: Article / Letter to the editor
Ano: 1947
URL: http://www.repository.naturalis.nl/record/524431

Een vruchtbaar terrein van studie
Provedor de dados: 16
Autores: Jacobs, M.
It is noted with some surprise that in none of the well-known floras of the Netherlands and in general of the floras of Europe and North America, the times of fruiting of the plants are regularly indicated. Knowledge of fruits in general seems to be in a backward state as compared with the attention paid to flowers and their biology. It is remarkable that sometimes chromosome numbers are recorded while such easily observable data as fruiting time are neglected. This omission limits the usefulness of floras, if fruits are wanted for identification, demonstration, or propagation, and if times are to be set for weed control. If flowering and fruiting occur in markedly different periods, the fruiting stage seems seriously under-represented in herbaria. Since...
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/527795

Conservation
Provedor de dados: 16
Autores: Noteboom, H.P.
The IUCN/WWF Plants Conservation Programme 1984 — 1985. World Wildlife Fund chose plants to be the subject of their fund-raising campaign in the period 1984 — 1985. The objectives were to: 1. Use information techniques to achieve the conservation objectives of the Plants Programme – to save plants; 2. Increase public awareness of the importance of plants and plant communities to human welfare; 3. Broaden public perception of WWF as the International Conservation Organization primarily concerned with important environmental issues; 4. Tap new fund-raising and membership sources; 5. Explain the threat to specific plants and plant communities and what WWF and IUCN are doing about it, thereby setting the stage for the intensive fundraising activities that will...
Tipo: Article / Letter to the editor
Ano: 1985
URL: http://www.repository.naturalis.nl/record/533398

Personal news
Provedor de dados: 16
Autores: NN.
Father G. Peekel died Febr. 19, 1949, in the Bismarck Arch. He is known as a plant collector since 1908 when he was stationed in the Bismarck Archipelago. In this Bulletin (p. 44) the rescue of his MS. Flora of the Bismarcks was announced. Many of his specimens formed the subject of contributions to Malaysian phytography (cf. ”Beiträge zur Flora Papuasiens” in Engler’s Bot. Jahrb. since 1912, and ”Plantae Peekelianae” by L. DIELS). Peekeliodendron SLEUMER, and numerous plant species commemorate his name. Prof. Dr R. Kanehira died at Tokyo on November 27th, 1948. During the Japanese occupation of Java he was Head of the Herbarium and of the Library (”Bibliotheca”) at Buitenzorg. See also under ”Miscellaneous”.
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/533484

Heteroptera of Suriname I. Largidae and Pyrrhocoridae
Provedor de dados: 16
Autores: Doesburg , P.H. van.
This paper is intended as the first of a series concerning the Surinam heteropterous fauna. Although our knowledge of these insects in Suriname is still very incomplete, a survey given in this phase of investigations may well have its justifications. In the first place, it gives us an idea of what is really known about this subject at present, and in the second place, it will perhaps encourage further investigations. In Suriname there is a great need for compilations which are also of use to the biologist whose work is of a more practical nature. Much attention is therefore given here to the diagnostic characters, and keys are added to identify the species. As literature is difficult to obtain in the Guyanas, I have given a more detailed account of every...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/506296

Notes on the Distribution of the Pteridophytes of Suriname
Provedor de dados: 16
Autores: Kramer, K.U.
In a forthcoming publication (Kramer, in prep.) floristic and taxonomic data of the pteridophyte flora of Suriname will be assembled, with keys and notes on their local distribution and ecological preference. The present paper deals with the geographical distribution of Suriname pteridophytes beyond the boundaries of Suriname (Fig. 2), a subject that lies beyond the scope of a local fern Flora. In the past, some (but relatively not very many) authors of fern Floras included a paragraph on the distribution of the taxa (Posthumus, 1928; Christensen, 1932; Backer &amp; Posthumus, 1939). In some other fern Floras some space is devoted to ecology, but very little to geography (Holttum, 1954). In still others, considerations of a general kind on ecology and...
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/535180

Review
Provedor de dados: 16
Autores: Schuiteman, A.
As stated in the preface, this book is intended as a textbook on orchid biology. Fifteen chapters treat a diverse array of topics, from physiology to ethnobotany. In spite of its title, Fundamentals of Orchid Biology contains much general information that is only indirectly related to the purported subject matter. The chapter on cytology, for example, contains little which cannot be found in any undergraduate textbook on cell biology. More than one page in this chapter is devoted to the microscope used by Robert Brown, about which we learn that “it was made by the English barometers manufacturer Robert Banks (who also spelled his name Bancks) before 1820, and its stage is engraved with the maker’s name and address –Banks 441 Strand London.” I quote this as...
Tipo: Article / Letter to the editor
Ano: 2001
URL: http://www.repository.naturalis.nl/record/525782

Notes on the nomenclature of some grasses
Provedor de dados: 16
Autores: Henrard, J.Th.
For the incorporation of various grasses in the herbaria of our institutes, we are constantly looking for the correct names to accept, according to the priority. The study of the existing names, as they are given in the Index Kewensis, is therefore indispensable. Working in various genera of the grasses we find, however, that many names are not tenable, because they were accepted without studying the whole literature of the subject. It appeared that, various names are omitted in the Index Kewensis, and indications given in various papers are sometimes neglected. Thus, the well-known and characteristic Aristida rhiniochloa HOCHST., already described in the year 1855 and treated by me in the Critical Revision (p. 510) and in my Monograph, is not yet given in...
Tipo: Article / Letter to the editor
Ano: 1940
URL: http://www.repository.naturalis.nl/record/525863

Training a young Chimpanzee to attend to acoustic stimuli
Provedor de dados: 16
Autores: Bierens de Haan, J.A.
For certain reasons I wished to train a young chimpanzee to choose from two similar boxes the one characterised by the ticking of a metronome inside it. My subject was a young male chimpanzee (Pan leucoprymnus Lesson), approximately three years old, Tommy by name. He was a good-natured chap, quite tame, and already for some years in captivity. When we knew each other a little better, he would welcome me every morning with a hearty “uhuh”, as soon as he heard my steps, and after the experiments of the day we would take leave by shaking hands as old friends. Tommy was rather lazy and not so playful as most young chimpanzees, but this quality made working with him easier and more regular. With a few exceptions it did not give much trouble to make 50—60 trials...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/504669

Contributions to the History of Botanical Science
Provedor de dados: 16
Autores: NN.
Although this journal is more particularly destined to contain the results of taxonomical and geographical studies, it may sometimes provide accomodation for subjects of a different, though kindred nature. The more so, when an item is concerned, which is, in some way or another, closely allied to the editing institution. The apparently long-forgotten XVth Century MS., rediscovered in the library of the Rijksherbarium, is therefore a worthy subject for a series of papers under the general title proposed above. It has been carefully transponed into modern type, as may appear from the quotations given. Both the entire rewritten MS. and the original may be consulted in the Rijksherbarium and I avail myself of this opportunity to request the interest and, if...
Tipo: Article / Letter to the editor
Ano: 1936
URL: http://www.repository.naturalis.nl/record/524775

New records
Provedor de dados: 16
Autores: NN.
Family name, full name of taxon (incl. all authors), rough locality, date of collection, collector’s name and collection number, place(s) of deposit, previously known distribution, additional remarks, authority for the report. In a footnote the Foundation(s) from which grants were received may be mentioned. For examples see below. The Editors of the Bulletin disclaim any responsibility for possible misidentifications or superfluous records; these should be accredited to the correspondents who have reported them. We will moreover decide whether we will include a record or not depending on their significance as we see it. For the future the exact criteria for inclusion will be formulated after some experience with the subject.
Tipo: Article / Letter to the editor
Ano: 1988
URL: http://www.repository.naturalis.nl/record/533142

[Proceedings of the symposium 'Molluscan Palaeontology' : 11th International Malacological Congress, Siena (Italy) 30th August - 5th September 1992 / A.W. Janssen and R. Janssen (editors)]: Revision of Middle Miocene holoplanktonic gastropods from Poland, published by the late Wilhelm Krach
Provedor de dados: 16
Autores: Janssen, A.W.; Zorn, I.
In the early thirties the late Polish palaeontologist Wilhelm Krach started the publication of a long series of papers on the mollusc faunas and the biostratigraphy of the Tertiary deposits in Poland, predominantly focusing on the Miocene of the Carpathian Foredeep. In several of these papers holoplanktonic molluscs ('pteropods') are mentioned. Gradually Krach realised the potential value of these organisms in regional and interregional biostratigraphy, resulting in a special paper on the subject, published in 1981. In the present paper a substantial part of Krach's pteropod material, housed in the Institute of Geological Sciences at Kraków, is systematically revised and biostratigraphically interpreted according to modern standards and in accordance with...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22.
Ano: 1992
URL: http://www.repository.naturalis.nl/record/317304

Ascidians of the family Styelidae from the Caribbean
Provedor de dados: 16
Autores: Sloot, C.J. van der.
During a voyage to the West Indies undertaken in 1963-1964 Dr. P. WAGENAAR HUMMELINCK collected many specimens of marine organisms from Piscadera Baai, Curaçao, as a basis for the compilation of a preliminary list of the local fauna and flora. This paper deals with the styelid ascidians which dr. HUMMELINCK entrusted to me and whose study has formed the subject of a student’s nine-month practical course in taxonomy. Only three species, amongst the material collected from Piscadera Bay, seemed to be well enough characterized for them not to need revision. They are Styela partita (Stimpson), 1852, Polyandrocarpa (Eusynstyela) tincta (Van Name), 1902, and Symplegma viride Herdman, 1886. It has, therefore, been necessary to compare my material with earlier...
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/506031

On the Arrangement of the Septa in Eupsammid Corals
Provedor de dados: 16
Autores: Horst, C.J. van der.
While studying the corals, collected by the Siboga-Expedition, I was impressed by the fact, that there is no agreement between different authors concerning the arrangement of the septa in the family Eupsammidae. According to the general law of VON KOCH a new septum is formed invariably between two older ones, and that simultaneously around the entire circumference of the calicle according their classification. Therefore the number of septa of a given order equals the total number of septa of all preceding orders. In the Eupsammidae we do not find this regularity. The septa belonging to the cycles of higher order are not all present. This irregularity has been a subject of study by different authors, the last of whom is VON MARENZELLER ¹).
Tipo: Article / Letter to the editor
Ano: 1922
URL: http://www.repository.naturalis.nl/record/504032

Notes on the Mechanism of Folding
Provedor de dados: 16
Autores: Sitter, L.U. de.
§ 1. In this study only those folds as observed in the upper sedimentary layers of the Earth’s crust will be treated. Even with this restriction the subject is still so complicated, that we must narrow the scope to be able to treat it from a theoretical point of view. Hence we will confine ourselves to simple folds as synclines and anticlines, leaving alone those intricate structures generally known as Alpine folding. On the other hand faults connected with folding are such a common feature that any theory that does not take them into account will be valueless. Folding is the result of tangential forces acting at unknown depth. Only in very few instances we have some idea at what depth the force is active. In the Jura mountains for instance we know that...
Tipo: Article / Letter to the editor
Ano: 1936
URL: http://www.repository.naturalis.nl/record/505733

On the Rhinoceroses from the East-Indian-Archipelago
Provedor de dados: 16
Autores: Jentink, F.A.
It seems that the distribution of the Rhinocerotidae over the islands of the Malayan Archipelago is still a puzzle to all the authors, unscientific as well as scientific ones, even to the most modern writers on the subject. This fact is the more surprising as fifty years ago the question was nearly settled and as since the year 1876 the problem in fact does not exist more at all. Sal. Müller and Herm. Schlegel said 1839—44 ¹), that in Sumatra was living Rhinoceros sumatrensis, and in Java another species Rhinoceros sondaicus; the latter perhaps also in Borneo. Beautifully executed plates illustrate their accurate and excellent descriptions. The open question thus was this: does there exist a Rhinoceros in Borneo, and if so, to what species may it belong?
Tipo: Article / Letter to the editor
Ano: 1895
URL: http://www.repository.naturalis.nl/record/508783

Notes on Micractaeon, a monotypic genus of African land snails (Gastropoda Pulmonata: Ferussaciidae?)
Provedor de dados: 16
Autores: Bruggen, A.C. van; Winter, A.J. de.
Micractaeon kakamegaensis Verdcourt, 1993 (type loc. Kenya, Kakamega Forest), is a synonym of Pseudopeas koptawelilense Germain, 1934 (type loc. Kenya, Mt. Elgon); the proper name is therefore Micractaeon koptawelilensis (Germain, 1934). New anatomical data are supplied, more or less confirming classification in the family Ferussaciidae. The shell is subject to some considerable variation in size, shape and sculpture. The species appears to be widely distributed in various types of forest in tropical Africa (Ghana, Cameroon, eastern and south-eastern Zaïre, Kenya, Malawi, and eastern Zambia); hypsometrical distribution is generally from c. 950 m to c. 2300 m, although in Ghana it has been collected at altitudes of between &amp;lt; 250 and c. 700 m.
Tipo: Article / Letter to the editor
Palavras-chave: Gastropoda; Pulmonata; Ferussaciidae; Micractaeon; Africa; Ghana; Cameroon; Zaïre; Kenya; Zambia; Mala?i; Taxonomy; Distribution; 42.73.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/319133

Personal news
Provedor de dados: 16
Autores: NN.
Dr. J.A.R. Anderson, who retired from the Sarawak Forest Service, and now lives at 15 Church Hill, Edinburgh EH10 4BG, will continue his interest in Malesian botany and ecology as a consultant forester and ecologist. The MS. of a project on which he had been working for several years is now in the final stage. This is a ”Check List of the Trees of Sarawak”; the scientific names will be coded and alphabetically arranged by families, genera and species, together with a moderately comprehensive list of vernacular names. This should be of value to the Forest Department in Sarawak. Miss P. Aston, senior botanist at the Melbourne Herbarium, is Australian liaison officer at Kew where she will remain until mid-1974. She is specialized in aquatic plants of...
Tipo: Article / Letter to the editor
Ano: 1974
URL: http://www.repository.naturalis.nl/record/533367

The land-bridge theory in botany with particular reference to tropical plants
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van.
This essay was primarily made as a background study for a lecture on ‘Transpacific Floristic Affinities, particularly in the Tropical Zone’ in a symposium on ‘Pacific Basin Biogeography: Tropical Relationships’ at the 10th Pacific Science Congress, Honolulu, August 1961 ¹). The occasion was a welcome challenge to crystallize my knowledge and views on the fascinating subject of the Indo-Pacific plant geography which has occupied my thoughts for several decades. Besides, as a corollary of plant-geographical studies on the Malaysian flora, my interest in it was distinctly restimulated by the compilation of maps of Pacific plants for the work ‘Pacific Plant Areas’.
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/526226

The impact of Bt cotton on poor households in rural India
Provedor de dados: 17
Autores: Arjunan Subramanian; Matin Qaim.
The impact of genetically modified (GM) crops on the poor in developing countries is still the subject of controversy. While previous studies have examined direct productivity effects of _Bacillus thuringiensis_ (Bt) cotton and other GM crops, little is known about wider socioeconomic outcomes. We develop a microeconomic modeling approach and use comprehensive survey data from India to analyze welfare and distribution effects in a typical village economy. Bt cotton adoption increases aggregate employment with interesting gender implications. Likewise, aggregate household incomes rise, including for poor and vulnerable farmers, suggesting that Bt cotton contributes to poverty reduction and rural development.
Tipo: Manuscript
Palavras-chave: Biotechnology; Ecology.
Ano: 2008
URL: http://precedings.nature.com/documents/1812/version/1

The Importance of Patents for Scientists
Provedor de dados: 17
Autores: Sue Scott.
Patents have become a hot topic and the subject of much media attention.  If your main source of information about patents is the newspapers, you could be forgiven for having an extremely distorted view of what patents are, what they do, and what benefits and problems are associated with them.   All scientists want to be able to improve the world in some way, whether by contributing in a fundamental way to the fund of human knowledge or by delivering new and valuable technology.  If you are a scientist making inventions, it is increasingly important that you should have an understanding of the importance of patents in the modern world, and should have sufficient understanding of the patent system to make sure that your aims for your inventions are...
Tipo: Presentation
Palavras-chave: Biotechnology; Pharmacology.
Ano: 2008
URL: http://precedings.nature.com/documents/1974/version/1

Formal Systems Architectures for Biology
Provedor de dados: 17
Autores: Bradly Alicea.
When the word &amp;#x22;systems&amp;#x22; is used in systems biology, it invokes a variety of assumptions about what defines the subject under investigation, which in turn can lead to divergent research outcomes. We will take the position that systems are defined by their potential organizing and &amp;#x22;control&amp;#x22; mechanisms, which distinguishes complex, living systems from a primordial soup. This will be accomplished by defining and investigating three interesting control motifs in biological systems: dominoes and clocks, futile cycles, and complex feedforward regulation. Additional mechanisms that combine feedback and feedforward mechanisms will also be briefly elaborated upon. Throughout these examples, our focus will be on the connection...
Tipo: Presentation
Palavras-chave: Molecular Cell Biology; Bioinformatics.
Ano: 2011
URL: http://precedings.nature.com/documents/6369/version/2

Complex Systems Biology of Organisms
Provedor de dados: 17
Autores: I. C. Baianu.
Complex Systems Biology models and theories are axiomatically defined in terms of concrete categories and organismic supercategories (OS) to include both complete self-reproduction of logically defined pi-entities founded in Quine&amp;#x27;s logic and dynamic system diagrams subject to both algebraic and topological transformations. Mathematical models of complex organisms are expressed in terms of category theory and organismic supercategories (OS). OS theories have applications in: Bioinformatics, Developmental Biology, Genomics and Molecular Cell Biology
Tipo: Manuscript
Palavras-chave: Developmental Biology; Genetics &amp; Genomics; Molecular Cell Biology; Bioinformatics.
Ano: 2012
URL: http://precedings.nature.com/documents/7044/version/1

Neuroscience and eating disorders: the role of the medial temporal lobe
Provedor de dados: 17
Autores: Giuseppe Riva.
Evidence from psychology and neuroscience indicates that our spatial experience, including the bodily one, involves the integration of different sensory inputs within two different reference frames egocentric (body as reference of first-person experience) and allocentric (body as object in the physical world). Even if functional relations between these two frames are usually limited, they influence each other during the interaction between long- and short-term memory processes in spatial cognition. If, for some reasons, this process is impaired, the egocentric sensory inputs are no more able to update the contents of the allocentric representation of the body: the subject is locked to it.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;In our perspective, subjects with...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2010
URL: http://precedings.nature.com/documents/4235/version/1

Generating descriptive text from functional brain images
Provedor de dados: 17
Autores: Francisco Pereira; Greg Detre; Matthew Botvinick.
Recent work has shown that it is possible to take brain images of a subject acquired while they saw a scene and reconstruct an approximation of that scene from the images. Here we show that it is also possible to generate _text_ from brain images. We began with images collected as participants read names of objects (e.g., ``Apartment&amp;#x27;). Without accessing information about the object viewed for an individual image, we were able to generate from it a collection of semantically pertinent words (e.g., &amp;#x22;door,&amp;#x22; &amp;#x22;window&amp;#x22;). Across images, the sets of words generated overlapped consistently with those contained in articles about the relevant concepts from the online encyclopedia Wikipedia. The technique described, if...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/5666/version/1

Kinetic control of eukaryotic chromatin structure by recursive topological restraints
Provedor de dados: 17
Autores: Dominika Borek; Zbyszek Otwinowski.
Chromatin structure undergoes many changes during the cell cycle and in response to regulatory events. A basic unit of chromatin organization is the nucleosome core particle. However, very little is known about how nucleosomes are arranged into higher-order structures in vivo, even though the efficiency and precision of cell division imply high levels of structural organization. We propose abandoning the current paradigm of chromatin organization based on thermodynamics of the lowest energy state and replace it with the idea of a topologically restrained, high-energy structure. We propose that DNA is subject to a recursive topological restraint, and is anchored by hemicatenates that are part of the chromosomal scaffold. Long-distance _cis_-regulation of...
Tipo: Manuscript
Palavras-chave: Developmental Biology; Genetics &amp; Genomics; Molecular Cell Biology.
Ano: 2008
URL: http://precedings.nature.com/documents/2672/version/1

Formal Systems Architectures for Biology
Provedor de dados: 17
Autores: Bradly Alicea.
When the word &amp;#x22;systems&amp;#x22; is used in systems biology, it invokes a variety of assumptions about what defines the subject under investigation, which in turn can lead to divergent research outcomes. We will take the position that systems are defined by their potential organizing and &amp;#x22;control&amp;#x22; mechanisms, &amp;#xd;&amp;#xa;which distinguishes complex, living systems from a primordial soup. This will be accomplished by defining and investigating three interesting control motifs in biological systems: dominoes and clocks, futile cycles, and complex feedforward regulation. Additional mechanisms that combine feedback and feedforward mechanisms will also be briefly elaborated upon. Throughout these examples, our focus will be on...
Tipo: Presentation
Palavras-chave: Molecular Cell Biology; Bioinformatics.
Ano: 2011
URL: http://precedings.nature.com/documents/6369/version/1

Adaptive evolution and then what?
Provedor de dados: 17
Autores: Richard Svanb&amp;#xe4;ck; Mario Pineda-Krch; Michael Doebeli.
Traits determining ecological interactions and dynamics are generally subject to natural selection. That genetically based individual variation in ecological traits can influence population dynamics has interested population biologist from various perspectives. Population ecologists recognized the need to incorporate individual variation in models of population regulation, while evolutionary biologists wish to understand genetic and evolutionary dynamics, e.g. of life history traits, in density-regulated populations. But how does adaptation in ecological traits affect population dynamics? In this project we investigated how ecological dynamics changes as a consequence of adaptive evolution in ecological traits using an individual-based predator-prey model.
Tipo: Poster
Palavras-chave: Ecology; Evolutionary Biology.
Ano: 2007
URL: http://precedings.nature.com/documents/57/version/1

Control in technological systems and physical intelligence: an emerging theory
Provedor de dados: 17
Autores: Bradly Alicea.
The transduction and processing of physical information is becoming important in a range of research fields, from the design of materials and virtual environments to the dynamics of cellular microenvironments. Previous approaches such as morphological computation/soft robotics, neuromechanics, and embodiment have provided valuable insight. This work approaches haptic, proprioception, and physical sensing as all part of the same subject. In this presentation, three design criteria for applying physical intelligence to engineering applications will be presented. These criteria have several properties in common, which inspires two types of end-effector model: stochastic (based on a spring) and deterministic (based on a piezomechanical array). The generalized...
Tipo: Presentation
Palavras-chave: Biotechnology; Chemistry; Molecular Cell Biology; Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/5910/version/1

Improvement of PubMed Literature Searching using Biomedical Ontology
Provedor de dados: 17
Autores: Zuoshuang Xiang; Yongqun He.
PubMed articles are annotated using the Medical Subject Headings (MeSH) to increase search efficiency. However, MeSH contains limited information on many biomedical domains (e.g., vaccine). Biomedical ontologies may be used to improve PubMed searching capability. This study demonstrates that Vaccine Ontology (VO) can be used to significantly improve PubMed searching efficacy in the vaccine domain. The recall and precision of the ontology-based literature mining approach are analyzed and discussed.
Tipo: Poster
Palavras-chave: Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/3491/version/1

Fluctuating population dynamics promotes the evolution of phenotypic plasticity
Provedor de dados: 17
Autores: Mario Pineda-Krch; Richard Svanb&amp;#xe4;ck; Michael Doebeli.
An increasing number of studies are showing evidence in support of sympatric speciation. One basic question remains, however. When a population has undergone a branching in its phenotype, is this due to an evolutionary branching in the underlying genotype or due to phenotypic plasticity modifying a single genotype? Thus, phenotypic plasticity has come to be viewed as a trait subject to selection, just like any other phenotypic character1,2. Here we present a model addressing the conditions under which a predator phenotype experiencing selection for two alternative optimal phenotypes gives rise to genetically based phenotypic branching or to phenotypic plasticity, allowing the corresponding genotype to give rise to two alternative, well-adapted...
Tipo: Poster
Palavras-chave: Ecology.
Ano: 2007
URL: http://precedings.nature.com/documents/56/version/1

Dynamic Modeling of Vaccinating Behavior as a Function of Individual Beliefs
Provedor de dados: 17
Autores: Fl&amp;#xe1;vio C. Coelho; Cl&amp;#xe1;udia T. Code&amp;#xe7;o.
Individual perception of vaccine safety is an important factor in determining a person&amp;#x27;s adherence to a vaccination program and its consequences for disease control. This perception, or belief, about the safety of a given vaccine, is not a static parameter but a variable subject to environmental influence. To complicate matters, perception of risk (or safety) does not correspond to actual risk. In this paper we propose a way to model the dynamics of such beliefs in the context of a realistic epidemiological scenario. The methodology proposed is based on Bayesian inference, and can be extended to model more complex belief systems associated with decision models.
Tipo: Manuscript
Palavras-chave: Ecology.
Ano: 2008
URL: http://precedings.nature.com/documents/2447/version/1

Gynandromorphs in mosquitoes (Diptera: Culicidae) from Valle del Cauca, Colombia
Provedor de dados: 82
Autores: Barreto,Mauricio; Burbano,María E.; Barreto,Pablo.
Gynandromorphs of Culex nigripalpus Theobald (2), Cx. pedroi Sirivanakarn and Belkin (1) and Aedes albopictus (Skuse) (2) are described. Two individuals of the latter species were reared in the laboratory, while the remaining three specimens were wild-caught with different traps in rural areas in Valle del Cauca department, southwestern Colombia. All of the individuals were mounted on microscopic slides with Canada balsam. From each mosquito, main morphological characteristics are described and illustrated. Due to the paucity of information about this subject, these findings as well as other relevant cases are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Culex nigripalpus; Culex pedroi; Aedes albopictus.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000300008

Manual on Sea Level Measurement and Interpretation
Provedor de dados: 20
This manual is concerned primarily with techniques for the measurement of what are called relative sea level changes which means changes relative to the level of the land upon which the measuring instrument (the tide gauge) is located. The subject of changes in the level of land itself is reviewed later in this document but is given more detailed presentation in other reports to which we refer. The manual also concerns itself primarily with the part of the frequency spectrum of sea level change from minutes through to centuries by means of in situ devices at the coast (tide gauges). Such changes are sometimes called still water level changes, being changes over a period long enough to average over wind waves. The devices employed to make these measurements...
Tipo: Book
Palavras-chave: Oceanography; Sea level measurement; Sea level changes; Tide gauges; Acoustic data; Acoustic transducers; Acoustic current meters; Transducers.
Ano: 2002
URL: http://hdl.handle.net/1834/2685

Seychelles Fishing Authority: tuna bulletin first semester 2006
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and from data collected via the tuna sampling programme conducted during transhipment in port Victoria.  Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel.  Readers should note that many of the figures presented here are subject to revision (usually upwards) as more data become available.  The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.
Tipo: Journal Contribution
Palavras-chave: Catch statistics; Purse seines.
Ano: 2007
URL: http://hdl.handle.net/1834/1763

Seychelles tuna bulletin: Year 2011
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transshipment in Port Victoria.  Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transshipment. Readers should note that many of the figures presented for longline fishing vessel are subject to...
Tipo: Report
Palavras-chave: Tuna fisheries; Purse seiners; Catch statistics; Longlining; Fishery data; Tuna.
Ano: 2012
URL: http://hdl.handle.net/1834/5325

Seychelles Fishing Authority: tuna bulletin first semester 2006
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and from data collected via the tuna sampling programme conducted during transhipment in port Victoria.  Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel.  Readers should note that many of the figures presented here are subject to revision (usually upwards) as more data become available.  The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.
Tipo: Report
Palavras-chave: Catch statistics; Purse seines.
Ano: 2007
URL: http://hdl.handle.net/1834/1763

Implications of Expected Climate Change in the Eastern  African Coastal Region: an Overview
Provedor de dados: 20
Autores: Ogallo, L.J.; Alusa, A.L.
Anticipated global warming as a result of the emission of greenhouse gases into the atmosphere was the most important subject discussed during the fifteenth session of the Governing Council of UNEP and at the Second World Climate Conference. The so-called greenhouse effect is a most pressing environmental problem to the extent that it involves many scientific disciplines and hence presents major challenges. The greenhouse gases (CO2,' CFCs, CH4, N2O, O3, etc.) have the effect of changing the atmosphere's radiative balance by trapping more heat near the earth's surface resulting in a rise in global mean surface temperature. It is now clear that if the burning of fossil fuel continues at the present rate, global warming is a virtual certainty.
Tipo: Report
Palavras-chave: Global warming; Climate change; Http://aims.fao.org/aos/agrovoc/c_35367.
Ano: 1992
URL: http://hdl.handle.net/1834/825

Technological improvements for the cultivation of invertebrates as food for fishes and crustaceans: 2. Hatching and culturing of the brine shrimp, &lt;i&gt;Artemia salina&lt;/i&gt; L.
Provedor de dados: 27
Autores: Sorgeloos, P.; Persoone, G.
Although extensive fundamental research has been performed on the brine shrimp, the yields from hatching and culturing this organism which is widely used in mariculture, can be greatly improved. By exposing the immersed cysts to light and by using a new type of hatching cylinder and separator box, greater hatching and separation efficiencies can be obtained. Controlled mass culture of brine shrimp larvae to the adult stage has been extremely difficult until now; the literature on the subject is reviewed and a new technique of high density culturing at the pilot-stage is described.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia salina.
Ano: 1975
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3511

Determination of seasonal phytoplankton communities, based on quantitative data using a mathematical analysis
Provedor de dados: 27
Autores: Caljon, A.
The definition of algal communities has always been a very discussed subject. We applied a principal component analysis on quantitative phytoplankton data. This ordination technique made it possible to distinguish the algal groups present. This technique is very often applied in the phytosociology of higher plants but less frequently in the phytosociology of algae. Till now this ordination has been used in phycology, merely for marine- and freshwater benthic algae, e.g. the benthic diatoms of rivers (Descy 1976a, b).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Mathematical analysis; Phytoplankton; Seasonal variations.
Ano: 1978
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3581

Final Report on Feed
Provedor de dados: 21
Autores: Beck, Alexander; Cabaret, Jacques; Halberg, Niels; Ivanova-Peneva, Sonya; Melby Jespersen, Lizzie; Kretzschmar, Ursula; Lampkin, Nicolas; Lembo, Guiseppe; Monod, Mariane; Moritz, Robin; de la Plaza Pérez, José Luis; Speiser, Bernhard; Tittarelli, Fabio.
The expert group for technical advice on organic production (EGTOP; thereafter called „the Group‟) in replying to point a) of the mandate concerning substances assessment concludes on the basis of the knowledge available in the group and information provided with the dossiers and by the Commission that: E 535 Sodium ferrocyanide anti-caking material, should be approved for use as a feed additive in salt for organic animal feed, subject to:  - a maximum dose rate of 20 mg/kg NaCl (the maximum defined for human food) and  - a limited time period, in order to provide a legal basis for current practice in the short term and to encourage the adoption of preferred carbonate alternatives longer term. E 566 Natrolite-Phonolite anti-caking material should be...
Tipo: Report
Palavras-chave: Feeding and growth; Policy environments and social economy.
Ano: 2011
URL: http://orgprints.org/19563/1/final_report_on_feed_to_be_published_en.pdf

Transition to organic production
Provedor de dados: 21
Autores: Transition to organic production, Organic Agriculture Centre of Canada.
The purpose of this database is to provide organic farmers and agronomists access to resources containing information on successful ways to transition to organic production. The tool provides resources that introduce the user to organic production and will help with the planning process of the transition. The tool will direct the user to a database of scientific papers and practical resources on the subject matter. This tool is for specific use of organic farmers and crop advisors and includes resources from various locations.
Tipo: Practice tool
Palavras-chave: Production systems Soil quality Crop health; Quality; Protection Weed management Farm nutrient management.
Ano: 2023
URL: http://orgprints.org/31949/3/Cover%20Image.%20Transition%20to%20organic%20production.png

Development of policies for organic agriculture
Provedor de dados: 21
Autores: Lampkin, Nic.
This report was presented at the UK Organic Research 2002 Conference. Since the late 1980s, policies to support organic farming have become widespread in Europe, in particular in the context of agri-environmental and rural development measures. Policies, originally focused on supporting conversion to and continued production, have been modified to recognise the need for the integration of marketing and information activities, in some cases delivered through national or regional action plans, examples of which are considered. The need for a strategic action plan at the European level has been identified and is under development. The outcome of this and the development of post Agenda 2000 organic farming policies to embrace an enlarged European Union is the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Policy environments and social economy.
Ano: 2002
URL: http://orgprints.org/8313/1/lampkin_policies_organic_agriculture.pdf

From principles to decision procedures and criteria - 3 case studies resulting from EU policy oriented research project work: criteria for feed, for food processing and for crop inputs
Provedor de dados: 21
Autores: Schmid, Otto.
The presentation outlines how to     The presentation outlines how to come from principles to decision criteria with 3 case studies (feed, food processing, crop inputs):  At least 2 additional steps are necessary to come from very general overarching basic principles to decision criteria:   - For the most important areas the relevant (working) principles have to be formulated:  =&gt; translate subject/area-related (operational) aims as basis for norm setting  - Participatory procedure with stakeholder involvemement is important, which needs time   - Criteria should be precise enough (clear priority, exclusion criteria, criteria for derogations) – for operators and control bodies
Tipo: Conference paper, poster, etc.
Palavras-chave: Regulation.
Ano: 2006
URL: http://orgprints.org/8175/1/Schmid_Principles_%26_criteria_BIOFACH_2006_final.pdf

Soil and Fertility Management in Organic Systems
Provedor de dados: 21
Autores: Organic Agriculture Centre of Canada, Dalhousie University.
The purpose of this database is to provide organic farmers and agronomists access to resources containing information on soil healthy and fertility management in organic arable farming. The resource includes categories of soil health, nitrogen, phosphorus, nutrient management, composting and manures as solutions for soil management. The tool will direct the user to a database of scientific papers and practical resources on the subject matter. This tool is for specific use of organic farmers and includes resources from various locations.
Tipo: Practice tool
Palavras-chave: Production systems Soil quality Soil Crop health; Quality; Protection Weed management Farm nutrient management.
Ano: 2023
URL: http://orgprints.org/31946/3/Cover%20Image.%20Soil%20and%20Fertility%20Management%20in%20Organic%20Systems.png

Leistungsauftrag 2004-2007 an die Stiftung Forschungsinstitut fuer biologischen Landbau (FiBL), Frick; Thema Lebensmittelqualität
Provedor de dados: 21
The Food Quality Division at FiBL engages in research and provides services with the purpose of raising the quality of foodstuffs. It carries out quality assurance on organic products with regard to contamination with pesticides, GMO or human pathogens, clarifies differences in quality between organic and conventional foodstuffs, and produces verified data on the health-related effects of particular products. Another important area is keeping organic production free of genetically modified organisms.
Tipo: Research Programme description
Palavras-chave: Food security; Food quality and human health.
Ano: 2023

Phänomenologie der Natur: eine methodologische Erweiterung der quantifizierenden Naturwissenschaften
Provedor de dados: 21
Autores: Timmermann, Martin.
In order to secure the quality of organic agriculture and its products, there is a demand for alternative research approaches that are presently the subject of lively discussions. One of these approaches is called “the phenomenology of nature”. From a methodo-logical point of view and compared with quantifying approaches, the aspects of a nature-phenomenological approach, its scientific value and the use of the concept goetheanism are discussed. The phenomenology of nature approach can be linked to the quantifying natural sciences and employed in connection with them.
Tipo: Conference paper, poster, etc.
Palavras-chave: Research methodology and philosophy Food security; Food quality and human health Crop husbandry.
Ano: 2007
URL: http://orgprints.org/9453/1/9453_Timmermann_Vortrag.pdf

Unkrautunterdrückung von ökologischen Mischfruchtanbausystemen: Effektivitätskontrolle durch Messung der photosynthetisch aktiven Strahlung
Provedor de dados: 21
Autores: Schochow, Dipl.-Ing. agr. Martin; Paulsen, Dr. Hans Marten.
Weeds are one of the main problems in organic farming. Mixed cropping systems are a good alternative to deprive sunlight from the weeds by obtaining a compact crop. The control of efficiency is one subject of the BÖL-project “Mixed cropping systems with oilseeds”. A differential measurement of photosynthetic active radiation (PAR) above canopy and inside the crop characterizes weed competition of mixed cropping systems.
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Weed management.
Ano: 2005
URL: http://orgprints.org/3571/1/3571.pdf

Organic Centre Wales Factsheet 17: CAP reform and organic farming II
Provedor de dados: 21
Autores: Anon,.
The CAP Reform agreement reached in Luxembourg on 26th June 2003 has significant implications for all producers. This factsheet focuses on those aspects of the reform package of specific interest to organic producers in Wales, and should be read in parallel to Factsheet 16 which gives definitions and provides more detail on other potential affects of the agreement on organic farms and farming in Wales. Although the major decision in Wales has been made – that the Single Farm Payment (SFP) will be on the ‘historic’ basis – many details of the implementation of the SFP are still being clarified in Brussels. Therefore, this document is for guidance ONLY, on OCW’s current understanding and interpretation of the Regulation, and will be subject to updates as...
Tipo: Other
Palavras-chave: Regulation Education; Extension and communication Values; Standards and certification Farm economics.
Ano: 2004
URL: http://orgprints.org/10802/1/capiieng.pdf

Salient Trends in Organic Standards: Opportunities and Challenges for Developing Countries
Provedor de dados: 21
Autores: Giovannucci, Daniele.
This paper presents an overview of the fundamental issues in the production, trade and regulation of organic products. It notes the changing consumer and trade environments that are driving organics beyond the realm of niche products toward an increasingly relevant position among other important agricultural standards.   Rather than a comprehensive analysis it outlines key elements that are most relevant to developing country producers including the likely impacts of adopting organics and the salient trends drawing from recent empirical research and the current literature on the subject. Finally, this document briefly assesses the significant constraints and opportunities facing the sector in order to draw some practical policy and investment conclusions.
Tipo: Working paper
Palavras-chave: Policy environments and social economy; "Organics" in general; Markets and trade.
Ano: 2006
URL: http://orgprints.org/12857/1/Salient_Trends_in_Organic_Standards%2DOpportunities_for_Developing_Countries_Final.pdf

Conservation tillage in organic farming
Provedor de dados: 21
Autores: Krauss, Maike; Mäder, Paul; Peigne, Joséphine; Cooper, Julia.
Conservation tillage in organic farming combines the principles of organic farming with the benefits of soil erosion control achieved by the conversion from ploughing to either reduced tillage or no-tillage/direct-seeding. This chapter reviews more than two decades of on-station and on-farm research. The chapter outlines the main benefits of conservation tillage before considering its main challenges. The chapter also contains a number of specific case studies from the field. Finally, the chapter looks ahead to future research trends in this area and offers detailed guidance on where to find further information about this subject.
Tipo: Book chapter
Palavras-chave: Soil tillage.
Ano: 2018
URL: http://orgprints.org/34333/1/Book-%20Improving%20organic%20crop%20cultivation.pdf

Pest Management in Organic Cropping Systems
Provedor de dados: 21
Autores: Organic Agriculture Centre of Canada, Dalhousie University.
The purpose of this database is to provide organic farmers and agronomists access to resources containing information on pest management in organic cropping systems. The tool provides information on disease management, insect pest management and weed management through a variety of means. The tool will direct the user to a database of scientific papers and practical resources on the subject matter. This tool is for specific use of organic farmers and crop advisors and includes resources from various locations.
Tipo: Practice tool
Palavras-chave: Production systems Soil quality Crop health; Quality; Protection Weed management Farm nutrient management.
Ano: 2023
URL: http://orgprints.org/31942/3/Cover%20Image.%20Pest%20Management%20in%20Organic%20Cropping%20Systems.png

Against the grain
Provedor de dados: 21
Autores: Döring, Thomas F.; Crowley, Oliver; Wolfe, Martin.
An Organic Research Centre project is examining how diversity-based tools can assist in the on-farm improvement of organic wheat.  Successful organic crop production requires varieties that are resistant to diseases, competitive against weeds, and effective at scavenging nutrients. Yet conventional plant breeding has largely neglected organic systems by breeding varieties exclusively for high input conditions. As a consequence, organic producers currently do not have enough choice of plant varieties for organic conditions.  One way to expand the choice is to create plant diversity anew and subject it to natural selection on organic farms.  After several generations the dominating plants would be better suited to organic systems. This idea is being tested...
Tipo: Newspaper or magazine article
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2011
URL: http://orgprints.org/19777/1/2011.Doring_et_al.OrgFarm.pdf

Organic vegetable production in Southern Italy: soil fertility management and fertilisation strategies.
Provedor de dados: 21
Autores: Caturano, E.; Roccuzzo, G.; Canali, S.; Adamo, S.; Giuffrida, F.; Leonardi, C.
Despite the importance of the organic sector in Italy, there are still many difficulties in crop management amenable to weed control, plant protection and soil fertility keeping. Concerning this last aspect and focusing attention to the vegetables crops, the subject is even more complex for the intensive cultivations, the difficulty of rotations implementation, etc. To develop research programmes, we have in a preliminary phase carried out, in a representative area in the south of Italy, a survey aimed at better understanding the main characteristics of organic vegetable agrosystems in terms of plant nutrition and fertility maintenance. The picture concerning about fifty farms is presented and discussed.
Tipo: Conference paper, poster, etc.
Palavras-chave: Biodiversity and ecosystem services.
Ano: 2008
URL: http://orgprints.org/12651/1/Caturano_12651_ed.doc

Introduction of Organic Eprints
Provedor de dados: 21
Autores: Rasmussen, Ilse A.
Organic Eprints is an open, on-line archive for research in organic food and farming with more than 10,000 publications - and growing rapidly. All use of the archive is free of charge. There are 15,000 registered users of Organic Eprints, and the archive has more than 175,000 visits each month. The archive contains scientific and popular articles, reports, presentations, project descriptions, books and other research publications. For each publication there is a short summary along with  information about authors and contacts, publishing details, peer review status, subject area and research affiliation. In most cases, the full articles are freely available for download.
Tipo: Conference paper, poster, etc.
Palavras-chave: Technology transfer; Research communication and quality.
Ano: 2011
URL: http://orgprints.org/19570/4/19570.pdf

Organic Field Crop Production
Provedor de dados: 21
Autores: Organic Agriculture Centre of Canada, Dalhousie University.
The purpose of this database is to provide organic farmers and agronomists access to resources containing information on specific organic crop production. The tool provides information on cereals and grains, forages, oilseeds, pulses, row crops, breeding and reduced tillage. The tool will direct the user to a database of scientific papers and practical resources on the subject matter. This tool is for specific use of organic farmers and includes resources from various locations.
Tipo: Practice tool
Palavras-chave: Production systems Soil quality Cereals; Pulses and oilseeds Crop health; Quality; Protection Weed management Farm nutrient management.
Ano: 2023
URL: http://orgprints.org/31938/3/Cover%20Image.%20Organic%20Field%20Crop%20Production.png

Crop Rotation in Organic Systems
Provedor de dados: 21
Autores: Dalhousie University/Organic Agriculture Centre of, Canada.
The purpose of this database is to provide organic farmers and agronomists access to resources containing information on crop rotation for organic production. The tool provides information on cover crops, green manures, specific crop rotations and intercropping. The tool will direct the user to a database of scientific papers and practical resources on the subject matter. This tool is for specific use of organic farmers and crop advisors and includes resources from various locations.
Tipo: Practice tool
Palavras-chave: Production systems; Crop combinations and interactions; Soil.
Ano: 2023
URL: http://orgprints.org/31682/1/crop-rotation.html

Local food supply chain: a case of rural food processing firms and catering business in Finland
Provedor de dados: 21
Autores: Forsman, Sari; Paananen, Jaana.
The subject of this paper is the integration of food production and processing, distribution, and consumption on local markets in rural areas. We approach this integration from the point of view of an alternative food supply chain, a local food system as an example. The data were gathered through semistructured interviews with 12 entrepreneurs and 9 representatives of institutional food service units and restaurants in Eastern Finland.
Tipo: Conference paper, poster, etc.
Palavras-chave: Markets and trade Processing; Packaging and transportation.
Ano: 2002
URL: http://orgprints.org/6180/1/dar_3.pdf

The environmental and socio-economic impacts of organic farming in Wales
Provedor de dados: 21
Autores: Frost, David; Ardeshir, Danny; Davies, Owen.
The scientific basis of organic agriculture’s role in benefiting health, the environment and agricultural communities has been the subject of considerable debate. In Wales, a three-year monitoring study found evidence of the compatibility of organic farming with environmental conservation. The study also found a positive attitude towards production issues among organic farmers, but increasing concerns about marketing and profitability.
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems.
Ano: 2005
URL: http://orgprints.org/4353/3/Frost_etal_4p_revised%2Ded.doc

Modelluntersuchungen zu Treibhausgasemissionen der ökologischen und konventionellen Milcherzeugung
Provedor de dados: 21
Autores: Frank, Helmut; Schmid, Harald; Hülsbergen, Kurt-Jürgen.
A model to analyse the fossil energy input and the greenhouse-gas (GHG) emissions of dairy farms is presented. The model was applied in model farms that base on a set of real dairy farms. The subject of the examination is to identify the major energy inputs and contributing factors to the GHG-emissions of dairy farming. The results show that the fodder production, the milking process and the breeding of heifers are the biggest energy inputs. The main sources of GHG are the fodder production and methane from digestion. Strategies to optimise farming systems and to mitigate GHG-emissions from dairy farms can be derived from the results.
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Air and water emissions; Technology transfer.
Ano: 2013
URL: http://orgprints.org/21613/1/21613_Frank.pdf

LEAFSE – Lernen durch (Studenten-)Austausch – Landwirtschaft-Nahrungskette-Umwelt
Provedor de dados: 21
Autores: von Fragstein und Niemsdorff, Prof. Dr. Peter; Sriskandarajah, Prof. Dr. Nadarajah.
The LEAFSE project is the first EU sponsored joint venture project between four European and four Australian universities. It is funded for three years (2003 to 2005) and enables the exchange of 36 students from each continent. The umbrella subject of the project covers agriculture-food systems-environment. Experiential learning is the special focus for all students that are linked together through video-conference tools.
Tipo: Conference paper, poster, etc.
Palavras-chave: Education; Extension and communication.
Ano: 2003
URL: http://orgprints.org/3802/1/3802.pdf

Broilers reduce the apple sawfly population in organic apple growing
Provedor de dados: 21
Autores: Lindhard Pedersen, Hanne; Olsen, A.; Korsgaard, Maren; Pedersen, Birgitte.
In organic production in Denmark, no pesticides are allowed. The need for alternative pest control is therefore large. Apple sawfly (Hoplocampa testudinea) cause big crop losses in apples. Sawflies infest fruitlets and cause these to drop prematurely after which the pests pupate in the topsoil.    Combined production of hens and fruit trees is a subject often discussed in organic fruit production in Denmark. The feeding poultry may reduce the population of pests, which stay in the soil as a part of their life circle. Yet, very little research has been carried out on this type of production system.
Tipo: Journal paper
Palavras-chave: Soil.
Ano: 2004
URL: http://orgprints.org/10124/1/10124.pdf

BIODYNAMIC LANDSCAPE DESIGNING WITH BIOPONICS
Provedor de dados: 21
Autores: SINGHANIA, PAWAN KUMAR; SINGHANIA, ARCHANA.
Never before the subject of Landscaping is covered in any of the past IFOAM Conferences. BIODYNAMIC Landscape Garden Designing is a new approach for Urban Landscaping where purposeful plantations are carried out, incorporating the science of BIOENERGETICS (measuring the energies in Plants, trees, and Earth Energies) which are also useful as Therapeutic (Healing) Gardens, suitable for Health Care institutes, Residential Complexes and Educational Institutions. The conventional approach is to follow the chemical methods, but the purpose of this presentation is to introduce the innovative technology of BIOPONIC1 method. This can inspire and give a new direction to the Landscape Architects and Garden Contractors in designing Urban Landscapes.
Tipo: Conference paper, poster, etc.
Palavras-chave: Technology transfer; Landscape and recreation.
Ano: 2014
URL: http://orgprints.org/23281/7/23281.pdf

Tierseuchen – von der Betroffenheit und Bewältigung existentieller Risiken
Provedor de dados: 21
Autores: Jürgens, Dr. Karin.
This contribution deals with a subject that, at the latest, became topical for organic farmers since the occurence of the foot and mouth disease. It shows how livestock owners affected by an animal disease overcame the killing of the entire livestock. Cases of zoonosis not only have economical impacts on farmers, the experience leaves them traumatized. The article makes an appeal to develop special counselling programmes, which include the particular situation of organic farmers dealing with such traumatic crisis.
Tipo: Conference paper, poster, etc.
Palavras-chave: Education; Extension and communication Social aspects.
Ano: 2005
URL: http://orgprints.org/3743/1/3743.pdf

Theory and reality of organic soil fertility - organic matter
Provedor de dados: 21
Autores: Gosling, Paul; Shepherd, Mark.
This report was presented at the UK Organic Research 2002 Conference. Results are reported suggesting no significant difference between the level of soil organic matter on established organic farms in Southern England and paired conventionally managed farms. We discuss the possible reasons for this and also examine why the literature on this subject is frequently contradictory.
Tipo: Conference paper, poster, etc.
Palavras-chave: Research methodology and philosophy; Soil; Farming Systems; Soil quality.
Ano: 2002
URL: http://orgprints.org/8267/1/gosling_shepherd_Theory_soil__fertility.pdf

Organic Centre Wales Factsheet 24: The Organic Farming Scheme (OFS)
Provedor de dados: 21
Autores: Anon,.
This factsheet describes the Organic Farming Scheme, an agri-environment scheme that offers payments to farmers in Wales to help them convert to organic farming with the aim of benefiting the environment. It is a key part of the Organic Action Plan for Wales, one of the aims of which is to increase the area of agricultural land in Wales under organic management by 10 – 15% by 2010. The OFS is funded by the EU and the Welsh Assembly Government as part of the 1999-2006 Rural Development Plan (RDP) for Wales, and will be subject to revision for the new 2007-2013 RDP.  Issues covered include, how payments are structured, who is eligible, how to apply and how to get advice on organic conversion.
Tipo: Other
Palavras-chave: Policy environments and social economy Education; Extension and communication Farm economics.
Ano: 2006
URL: http://orgprints.org/10797/1/24OFSeng.pdf

Production and Marketing of Organic Ornamentals. Developments in Switzerland, the Netherlands and Germany
Provedor de dados: 21
Autores: Billmann, Bettina.
The importance of organic ornamental plants (cut flowers, pot- and bedding plants, herbaceous plants, ornamental herbs, trees and shrubs) is ranging on a very low level. But the common interest is growing. Since 1996 the first European meeting on organically grown ornamental plants took place in Switzerland more and more sellers offer these plants. As well the number of newspaper articles and events occupying this subject is growing.
Tipo: Conference paper, poster, etc.
Palavras-chave: Ornamentals; Flower bulbs and tree nurseries.
Ano: 1998
URL: http://orgprints.org/4853/1/4853%2Dbillmann%2Db%2D1998%2Dornamental.pdf

Organic chains in the United Kingdom and Germany: lessons for Dutch organic agribusiness
Provedor de dados: 21
Autores: Meeusen, Marieke JG.
This report was presented at the UK Organic Research 2002 Conference. This paper presents lessons for Dutch organic agribusiness based on a study of the UK and Germany. The following lessons are drawn: public-private cooperation is desirable for the sake of further development; the supermarket chain is necessary in order to achieve a large market share; consumers and supermarket chains subject organic products to at least the same demands that they have for regular products; communication: [1] a task for the government and market parties, [2] striving for one mark of quality [3] health is the driving motivation, although not communicated as such; organic agriculture has more chains and more segments.
Tipo: Conference paper, poster, etc.
Palavras-chave: Markets and trade; Produce chain management.
Ano: 2002
URL: http://orgprints.org/8446/1/meeusen_chainsUK_Germany.pdf

Biochar as a Soil Amendment: A Review of the Environmental Implications
Provedor de dados: 21
Autores: Woolf, Dominic.
The  term  'biochar'   refers  to black carbon  formed by  the pyrolysis of  biomass  i.e.  by heating biomass in an oxygen-free or low oxygen environment such that it does not (or only partially) combusts.   Traditional charcoal is one example of biochar produced from wood.  The term 'biochar' is much broader than this however, encompassing black carbon produced from any biomass feedstock.   The use of biochar as a soil additive has been proposed as a means  to simultaneously mitigate anthropogenic climate change whilst improving agricultural soil fertility.   This paper provides a review of what is known about both of these claims and also about the wider environmental implications of the adoption of this process.  The intention of this review is not...
Tipo: Report
Palavras-chave: Nutrient turnover; Soil quality; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/13268/1/Biochar_as_a_soil_amendment_%2D_a_review.pdf

Overview of Current Status of Standards and Conformity Assessment Systems
Provedor de dados: 21
Autores: Commins, Ken.
This paper has been prepared as a background document for the meeting of the International  Task Force on Harmonization and Equivalency in Organic Agriculture to be held in October 2003. Its purpose is to provide a general overview of the current situation with respect to regulations, standards and conformity assessment systems for organic agriculture and  processing.    The subject matter of several sections of this document was previously addressed in the  Reader for the February 2002 Conference on International Harmonization and Equivalence in  Organic Agriculture published by IFOAM. In compiling this overview the author has drawn  heavily on the previous texts updating the data as appropriate. In many ways what follows is a synopsis of the documents in...
Tipo: Working paper
Palavras-chave: Regulation.
Ano: 2004
URL: http://orgprints.org/3109/1/elsITFKenEdit.doc

ECOPHYTOPIC – The portal for integrated crop protection of arable crops
Provedor de dados: 21
It is the part on arable crops of the large web portal EcophytoPIC dedicated to support integrated farming. It is the place to look at when willing to go deeper on a subject as it can supply many documents from different sources, all very well presented in an easy readable and browsing format, but it require good searching criteria not to risk to get lost in the huge amount of information. Searching engine allows to search by crop, by topic or other. Besides pest and disease control, where several info-sheets are available, the part on mechanical weed control is very rich, well presented and well-illustrated.
Tipo: Practice tool
Palavras-chave: Crop health; Quality; Protection Weed management.
Ano: 2023
URL: http://orgprints.org/30584/1/30584.png

Agricultural Sustainability - Progress and Prospects in Crop Research
Provedor de dados: 21
Agricultural Sustainability: Progress and Prospects in Crop Research, covers different aspects of sustainability in a holistic manner and presents a wide range of subject areas by agricultural experts from across the world. The book offers different points of view including important topics in agrobiodiversity, biotechnology, marginal crops, industrial approaches, resource conservation, nutritional enhancement of crops and crop products, and explores economic and political issues.
Tipo: Book
Palavras-chave: Crop husbandry; Knowledge management.
Ano: 2013
URL: http://orgprints.org/25284/1/bhullar-ed-2013-Agricultural%20Sustainability-book.pdf

New ways of regulating organic food and farming in Europe
Provedor de dados: 21
Autores: Schmid, Otto.
There is a paradigm shift needed in standard setting towards assessing progress rather than failure. Such systems needs good subject-related principles and objectives (e.g. for good animal housing). These need to be linked to decision criteria and suitable indicators, possibly more outcome and development-oriented. Assessment systems and Code(s) of (best) Practices should be developed by researchers, advisers and practitioners as complementary tools for re-oriented progress certification.
Tipo: Conference paper, poster, etc.
Palavras-chave: Regulation.
Ano: 2010
URL: http://orgprints.org/17939/1/schmid%2D2010%2Deuropean%2Dorganic%2Dcongress.pdf

Réseau de recherche et d'innovation technologiques Alimentation Référence Europe
Provedor de dados: 21
The aim of the technological innovation research network « Alimentation Reference Europe » (RARE) is to make new research partnerships between public organisms and private companies in the food field.  A second objective is to put in coherency the actions of the different ministries in favour of this multidisciplinary field, for the benefit of the consumers.    The thematics of this program are:  • food microbiology,  • human nutrition and ,  • food science, control of food standards,  • traceability technologies, transformation and security,  • quality,  • Human and social sciences in the food field.    Only a small part of this program concerns organic farming. This part depends of the food system subject areas and the third thematic.
Tipo: Research Programme description
Palavras-chave: Food systems.
Ano: 2023

Berücksichtigung von Standort- und Bewirtschaftungsfaktoren bei der Verbesserung von Verfahren der Grunddüngung und Humusbilanzierung unterschiedlich intensiver Anbausysteme
Provedor de dados: 21
Autores: Kolbe, Hartmut.
In dieser Ausarbeitung werden quantitative Zusammenhänge zwischen den Standort- und Bewirtschaftungsfaktoren und dem Verhalten an pflanzenverfügbaren Grundnährstoffen sowie den Gehalten an Humus im Boden ermittelt. Hierzu wurden Ergebnisse von vielen Felddauerversuchen aus Deutschland mit Hilfe der multiplen Regressionsanalyse ausgewertet. Die erlangten Erkenntnisse aus diesen Auswertungen wurden bei der Überprüfung und Verbesserung bestehender Verfahren der Grunddüngung und der Humusbilanzierung insbesondere des ökologischen Landbaus berücksichtigt.
Tipo: Working paper
Palavras-chave: Nutrient turnover; Soil quality; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/11056/1/Einflussfaktoren_Grundduengg_Humus_OeL.pdf

On the status of Dusky-legged Guan Penelope obscura Temminck, 1815 (Aves: Cracidae) in Paraguay
Provedor de dados: 84
Autores: Smith,Paul; Derna,Roberto.
Despite repeated references to the species in Paraguay, the status of the Dusky-legged Guan Penelope obscura in the country has been the subject of much debate. In an attempt to clarify the available data, a thorough review of literature records is provided and details of new and previously unpublished records that confirm that the nominate subspecies is present in Paraguay are given. With the species limits in the obscura complex poorly defined, we provide a brief discussion of the potential importance of Paraguayan populations for the conservation of the species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Distribution; Galliformes.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492015001400211

In vitro maintenance, under slow-growth conditions, of oil palm germplasm obtained by embryo rescue
Provedor de dados: 86
Autores: Camillo,Julcéia; Scherwinski-Pereira,Jonny Everson.
The objective of this work was to evaluate the in vitro maintenance of oil palm (Elaeis guineensis and E. oleifera) accessions under slow-growth conditions. Plants produced by embryo rescue were subject to 1/2MS culture medium supplemented with the carbohydrates sucrose, mannitol, and sorbitol at 1, 2, and 3% under 20 and 25±2ºC. After 12 months, the temperature of 20°C reduced plant growth. Sucrose is the most appropriate carbohydrate for maintaining the quality of the plants, whereas mannitol and sorbitol result in a reduced plant survival.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Elaeis guineensis; Elaeis oleifera; Arecaceae; Plant genetic resources.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000500426

Is the Turkish Agri-Food Sector Ready for EU Entry?
Provedor de dados: 31
Autores: van Berkum,   Siemen.
Joining the EU's single market would subject the Turkish food supply chain to competition from mature industries and highly efficient, well-organised companies in the rest of the Union. To be ready for this competition, the Turkish agri-food chain has to tackle a number of serious bottlenecks, requiring modernisation and restructuring of the farm and food sector, and a more efficient marketing system, which provides for quality improvement incentives and price transparency. The rise of modern retail chains in the country and the inflow of FDI are two important factors that help preparing the Turkish food supply chain for the competitive pressures implied by the EU single market.
Tipo: Conference Paper or Presentation
Palavras-chave: EU integration; Agri-food chain; Market structure and performance; Turkey; International Relations/Trade; F15; P27; Q13.
Ano: 2005
URL: http://purl.umn.edu/24626

Imperfections in the Economics of Public Policy, Imperfections in Markets, and Climate Change
Provedor de dados: 31
Autores: Stern,   Nicholas.
n the last twenty years economics has created much of lasting value and real potential: it has been a very fertile period. But economics has also suffered from what I shall term „collective amnesia‟ covering whole areas of public policy. And on policy and the role of government it has, embarrassingly in my view, swayed with the political winds to the detriment of both our profession and to outcomes. Both the amnesia and the political bending have contributed to the economic crisis of the last year or two and to hostility towards the profession. My purpose here is first to lament the amnesia on theories of public policy in imperfect economies, in short the subject of public economics, to describe the bending of public policy analysis to political vogue, and...
Tipo: Working or Discussion Paper
Palavras-chave: Public Policy; Climate Change; Public Economics; H.
Ano: 2009
URL: http://purl.umn.edu/55333

ON MARKETING QUOTAS FOR FLUID MILK
Provedor de dados: 31
Autores: Parish,   Ross M.
In this article I present a static economic analysis of the operation of milk marketing schemes (such as that administered by the New South Wales Milk Board) which employ marketing quotas for individual producers. This is a subject which has already received some attention in this Journal: I refer to the suggestion of Harris and Candler that marketing quotas for fluid milk should be freely traded among producers, and, more particularly, to Neutze's subsequent discussion of their proposal. Some of the problems raised, and apparent paradoxes uncovered in that discussion, will be considered in the second part of this article.
Tipo: Journal Article
Palavras-chave: Marketing.
Ano: 1963
URL: http://purl.umn.edu/23015

Ex Ante Economic Impact of Genetically Modified (GM) Cowpea in Benin
Provedor de dados: 31
Autores: Dofonsou,   Sika Gbegbelegbe; Lowenberg-DeBoer,   James; Adeoti,   Razack; Coulibaly,   Ousmane; Lusk,   Jayson L.
The net impact of pest-resistant GM crops on the welfare of both producers and consumers in developing countries is currently unknown and subject to speculation. This study uses choice-based conjoint protocol to estimate the net impact of pest-resistant Genetically Modified (GM) cowpea on net social welfare in Benin given price and income risks. Results imply that Bt cowpea will increase expected net social welfare by about $US 50 million per year in Benin given no inefficiencies in the seed sector. If inefficiencies in the seed sector are such that cowpea growers can access Bt cowpea seeds only 50% of the time, net benefits from Bt cowpea drop to about $US 11 million per year.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/9817

A Case for Re-evaluation of Income Averaging for Primary Producers
Provedor de dados: 31
Autores: Douglas,   Robert A.; Davenport,   Scott V.
Income averaging for primary producers is a long-standing tax policy in Australia. Major changes were made to the scheme in 1983 to overcome anomalies associated with the previous scheme. However the amended scheme has not been subject to review.  In this review, the scheme is found to perform poorly against the traditional evaluation criteria of equity, efficiency and simplicity. The general conclusion is that to avoid cross-subsidisation and investment distortions which are often inherent features of any general scheme, it is appropriate to consider the adequacy of self-averaging mechanisms.
Tipo: Journal Article
Palavras-chave: Public Economics.
Ano: 1995
URL: http://purl.umn.edu/12464

THE PERFORMANCE OF AGRICULTURAL MARKET ADVISORY SERVICES IN CORN AND SOYBEANS
Provedor de dados: 31
Autores: Irwin,   Scott H.; Martines-Filho,   Joao Gomes; Good,   Darrel L.
The purpose of this paper is to evaluate the performance of market advisory services for the 1995-2000 corn and soybean crops. A new database from the Agricultural Market Advisory Services (AgMAS) Project is used in the evaluation. This database should not be subject to survivorship and hindsight biases. Overall, the results provide limited evidence that advisory programs as a group outperform market benchmarks, particularly after considering risk. In contrast, some evidence exists that advisory programs as a group outperform the farmer benchmark, even after taking risk into account. There is little evidence that advisory programs with superior performance can be usefully selected based on past performance.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/22256

Charging for the use of plant varieties
Provedor de dados: 31
Autores: Kingwell,   Ross S.
Private and many publicly funded plant breeding organisations charge farmers for use of varieties they develop. This article compares four alternative charging mechanisms and outlines responses to these alternatives by farmers and plant breeders. Risk‐averse farmers and breeders are shown to have opposite preferences for charging mechanisms. Results suggest profit‐based or royalties are preferred by farmers whereas breeders prefer area or tonnage‐based royalties. Risk‐sharing arrangements between both parties could lead to an overall preference for profit‐based or royalties. However, this finding is subject to important caveats and practical limitations.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/117468

Economic Implications of the Transfer of Functions Legislation
Provedor de dados: 31
Autores: Scorsone,   Eric; Martin,   Joseph M.
Recent introduction of HB 4780 and its companion pieces of legislation (HB 4781-4788) has raised a number of questions about the appropriate level of government to deliver services to Michigan residents. Essentially, under provisions contained in the bill, elections, tax collections, and assessment functions would be transferred from "rural" townships to the county where the township is located. The bill defines a rural township as a township or charter township unit with population less than 10 thousand, or population between 10 and 20 thousand but does not provide police and fire on a 24-hour basis and sewer and water services to more than 50% of its residents. The Michigan Township Association (MTA) expects that 95% of Michigan townships would be...
Tipo: Working or Discussion Paper
Palavras-chave: Public Economics.
Ano: 2007
URL: http://purl.umn.edu/6562

The Impact of India's Cotton Yield on U.S. and World Cotton Markets
Provedor de dados: 31
Autores: Pan,   Suwen; Welch,   Mark; Mohanty,   Samarendu; Fadiga,   Mohamadou L.
Cotton is India’s main cash crop. It contributes to the livelihood of 60 million people and accounts for 30 percent of the country’s agricultural domestic product (Barwale et al., 2004). Total cotton acreage in India is estimated at 9 million hectares, the largest in the world (Gandhi, 2006). About 65 percent of cotton production activities are rainfed and subject to the vagaries of weather. Cotton is grown in nine states, spread over three agroclimatic zones with different planting schedules. Planting usually ends by the first week of June in northern regions (Punjab, Haryana, and Rajasthan), by mid-August in the central region (Gujarat, Maharashtra, and Madhya Pradesh), and by the first week of September in parts of the south (Andhra Pradesh, Karnataka,...
Tipo: Report
Palavras-chave: Agricultural and Food Policy.
Ano: 2006
URL: http://purl.umn.edu/53149

Impacts of Soybean Imports on Indian Processors, Farmers, and Consumers
Provedor de dados: 31
Autores: Persaud,   Suresh Chand; Dohlman,   Erik.
﻿India is one of the world’s largest importers of vegetable oils in part because of    low domestic oilseed production, and tariff and nontariff barriers preventing    oilseed imports. Simulation results indicate that India could lower its barriers to    soybean imports without adversely affecting farmers, since imports are economically attractive to crushers even when subject to modest tariffs which sustain    pre-liberalization farm and wholesale prices. Soybean processors in India achieve    higher rates of capacity utilization and lower unit costs using imported oilseeds.    Moreover, it is possible to partially redistribute to consumers the sizable gains    processors experience by lowering the soybean oil tariff.
Tipo: Journal Article
Palavras-chave: India; Oilseeds; Processing cost; Soybeans; Trade liberalization; Agribusiness; Agricultural and Food Policy.
Ano: 2006
URL: http://purl.umn.edu/62276

Support Prices as Policy Tools in Dairy Industry: Issues in Theoretical Modeling
Provedor de dados: 31
Autores: Premakumar,   V.; Chaudhary,   Sudhir.
A framework for modeling the dairy sector is developed, emphasizing the complexities unique to this Multiproduct industry.  Equilibrium conditions among competitive and joint dairy products are specified subject to mass balancing requirements, stable economic relationship and appropriate policy parameters.  The model is applied to Canada incorporating the country-specific dairy policy mix.
Tipo: Working or Discussion Paper
Palavras-chave: Canada; Multiproduct modeling; Dairy products; Technological constrains; Relative prices; Agricultural and Food Policy; Livestock Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/18617

Insuring Against Losses from Transgenic Contamination: The Case of Pharmaceutical Maize
Provedor de dados: 31
Autores: Ripplinger,   David G.; Hayes,   Dermot J.; Goggi,   Susana; Lamkey,   Kendall R.
Concerns about the risk of food supply contamination and the resulting financial losses have limited the development and commercialization of certain pharmaceutical plants. This article develops an insurance pricing model that helps translate these concerns into a cost-benefit analysis. The model first estimates the physical dispersal of maize pollen subject to a number of weather parameters. This distribution is then validated with the limited amount of currently available field trial data. The physical distribution is then used to calculate the premium for a fair-valued insurance policy that would fund the destruction of possibly contaminated fields. The flexible framework can be readily adapted to other crops, management practices, and regions.
Tipo: Working or Discussion Paper
Palavras-chave: Contemporaneous fertility; Costs and benefits; Insurance; Pharmaceutical maize; Pollen dispersal; Risks and benefits; Stochastic model.
Ano: 2008
URL: http://purl.umn.edu/37332

Measuring the Determinants of School Completion in Pakistan: Analysis of Censoring and Selection Bias
Provedor de dados: 31
Autores: Holmes,   Jessica.
This paper explores the demand for child schooling in Pakistan, using the Pakistan Integrated Household Survey (1991). There have been few such studies for Pakistan, a country with relatively low enrollment rates and education levels, high illiteracy, and large disparity between male and female education. Additionally, this study focuses on two potential sources of bias in the estimation of the demand for schooling. First, studies which do not distinguish between currently enrolled children and those who have completed their schooling subject their estimates to a form of censoring bias. Second, studies which exclude children who have left the household from their samples may introduce sample selection bias if the decisions to leave home and to attend...
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital; I2; C24.
Ano: 1999
URL: http://purl.umn.edu/28530

Organizational Innovation in Russian Agriculture: The Emergence of "New Agricultural Operators" and Its Consequences
Provedor de dados: 31
Autores: Rylko,   Dmitri N.; Jolly,   Robert W.; Mosolkova,   Maria A.
After almost a decade of downsizing, Russian agriculture has been steadily growing since the end of 90's against the background of deep organizational changes and innovations. The traditional collective farming segment is the key target and subject of innovations. Outside investors and operators have acquired control over farm assets from the primary nominal owners and possessors. As a result, exceptionally large commercial farm operations - "agroholdings" - are being created. Both inside and outside innovators are introducing organizational changes such as vertical integration, custom and contract farming, land leasing, machinery sharing and others. The paper discusses size, scope and character of the ongoing innovations and their short and long-term...
Tipo: Conference Paper or Presentation
Palavras-chave: Agroholdings; Contract and custom farming; New agricultural operators; Integration; Industrial Organization.
Ano: 2005
URL: http://purl.umn.edu/24446

IMPORTÂNCIA DAS EXIGÊNCIAS TÉCNICAS À EXPORTAÇÃO DE EMPRESAS BRASILEIRAS
Provedor de dados: 31
Autores: Souza,   Mauricio Jorge Pinto de; Burnquist,   Heloisa Lee.
This article presents results of a survey applied to Brazilian exporting firms to obtain primary data, which are subject to a statistical analysis about the relative importance attributed to technical barriers to trade. The methodological procedure used consisted in Rio Branco – Acre, 20 a 23 de julho de 2008 Sociedade Brasileira de Economia, Administração e Sociologia Rural factor analysis. This allowed the construction of three indexes: Traditional determinants Index - ICOND, Trade Impediments Index - IIMP and Technical requirements Index - IEXIG. The results indicated that technical requirements effects are different than other variables that affect exports. Additionally, the firms surveyed considered the IEXIG more restrictive than IIMP to their...
Tipo: Conference Paper or Presentation
Palavras-chave: Technical barriers; Brazilian exports; Factor analysis; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/96281

The Tariff-Only Import Regime for Bananas in the European Union: Is Setting the Tariff at Right Level an Impossible Mission?
Provedor de dados: 31
Autores: Guyomard,   Herve; Le Mouel,   Chantal; Levert,   Fabrice; Lombana,   Jahir.
The European Union is bound by World Trade Organisation agreements to move to a tariff-only import system for bananas by no later than 1 January 2006.  From that date, imports from non-ACP countries will be subject to a single tariff while ACP country bananas will continue to enter the EU market duty free.  This regime will replace the highly contested tariff-rate quota policy in place since 1993.  This paper shows that setting the tariff at a level that maintain the status quo is an impossible mission given uncertainties on quota rent estimates and quota rent distribution.
Tipo: Conference Paper or Presentation
Palavras-chave: Bananas; European Union; Tariff-rate quota; Tariff; ACP countries; International Relations/Trade.
Ano: 2005
URL: http://purl.umn.edu/24461

The effects of the interest rate ceilings on the micro lending market in South Africa
Provedor de dados: 31
Autores: Mohane,   Happy; Coetzee,   Gerhard K.; Grant,   William.
Interest rates are a topical subject in the micro lending industry in South Africa. The micro lending industry has been accused of charging usurious interest and exploiting the consumers. This has led to the Department of Trade and Industry passing a Usury Act with an aim of protecting the consumers. The Act imposes interest rate ceilings on loan finance provided by money lending institutions. These ceilings are proposed to be linked to the prime rate. Given this, it is not possible for micro lenders to charge full-cost recovery interest rates. This paper tries to highlight the effects of interest rate ceilings on the micro finance market. It argues that the biggest cost component of microlenders is administration costs and not the cost of capital, thus...
Tipo: Journal Article
Palavras-chave: Financial Economics; Marketing.
Ano: 2000
URL: http://purl.umn.edu/54233

Optimal livestock diet formulation with farm environmental compliance consequences
Provedor de dados: 31
Autores: Hadrich,   Joleen C.; Wolf,   Christopher A.; Harsh,   Stephen B.
The current method to derive livestock diets is to optimize cost performance subject to animal performance and resulting nutritional requirements via a linear programming model.  In contrast, we examine the livestock diet formulation problem as a multi-criteria decision model with the criteria being cost performance, feed efficiency, and environmental compliance costs.  We find that there are many situations where farm financial situations are improved by feeding products with higher costs per unit of protein but lower phosphorus levels.
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/19427

Illicit Agricultural Trade
Provedor de dados: 31
Autores: Ferrier,   Peyton Michael.
Agricultural and wildlife trade is subject to sudden, disruptive import restrictions arising from concerns over sanitary and phytosanitary safety and the conservation of natural resources. These restrictions can create significant international price differences that encourage the smuggling of goods across borders. This article presents an equilibrium model of smuggling where the supply and demand for smuggled goods depend on interregional price disparities in the presence of a trade ban. In this model, smuggling is more prevalent when demand and supply among trade partners is more inelastic or when there are fewer total trade partners at the time a trade ban is enacted. Applications are presented for regionalization, destruction of goods in government...
Tipo: Journal Article
Palavras-chave: Illicit trade; Invasive species; Smuggling; SPS Agreement; CITES; Endangered Species Act; Regionalization; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/45668

POSSIBLE CONTRIBUTIONS OF A COURSE IN COMMODITY EXCHANGES AND FUTURES TRADING TO A STUDENT'S GENERAL EDUCATION
Provedor de dados: 31
Autores: Gauthier,   Wayne M.
General education courses are important in preparing a student for life. Often, agricultural economics courses are perceived to be vocational and not particularly well-suited to the development of life-long skills. This paper considers the eight life-long skills cited as being important to a student's general education at Louisiana State University and argues that varied bits of subject matter presented in the Commodity Exchange and Futures Trading Course contribute to the development of each one of these skills. Such contributions need to be pointed out to those who argue for more general education courses in the curriculum at the expense of discipline courses.
Tipo: Conference Paper or Presentation
Palavras-chave: Marketing; Teaching/Communication/Extension/Profession.
Ano: 2003
URL: http://purl.umn.edu/16605

Plagiarism Without Apology--Systematic Integration of Available Information in a Long Run Agricultural Outlook
Provedor de dados: 31
Autores: Witzke,   Heinz Peter; Britz,   Wolfgang.
In the context of a long run agricultural outlook on behalf of the European Environmental Agency a new methodology has been developed to systematically integrate external forecasts into a quite detailed agricultural sector model. External forecasts usually provide estimates for the exogenous variables in modelling work and frequently they are also used for comparisons and potential reassessment of empirical specifications. The innovative characteristic of this study is that expert forecasts have been used to specify parameter changes expressing structural change affecting behavioural functions. The outlook was therefore set up as a simultaneous estimation and forecasting effort which permitted to integrate various, usually contradictory expert forecasts...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural outlook; Forecasting; Modelling; Expert information; Agricultural and Food Policy; C15; C53; Q11; Q19; Q21.
Ano: 2005
URL: http://purl.umn.edu/24666

Three Lectures on the Walrasian Hypotheses for Exchange Economies
Provedor de dados: 31
Autores: Brown,   Donald J.
This paper discusses the testable implications of the Walrasian hypotheses: H1 Observed market demand is the sum of consumer’s demands derived from utility maximization subject to budget constraints. H2 There exists an observable (locally) unique equilibrium price system such that the observable market demand is equal to the observable market supply in every market. H3 The observed equilibrium price system is a (locally) stable equilibrium of tâtonnement price adjustment. The main results are the Brown–Matzkin Theorem: H1 is testable, and the Brown– Shannon Theorem: H2 and H3 are not testable.
Tipo: Working or Discussion Paper
Palavras-chave: Exchange economies; Testable restrictions; Demand and Price Analysis.
Ano: 1997
URL: http://purl.umn.edu/28459

A BIOECONOMIC SIMULATION APPROACH TO MULTI-SPECIES INSECT MANAGEMENT
Provedor de dados: 31
Autores: Boggess,   William G.; Cardelli,   Dino J.; Barfield,   C.S.
Classical approaches to the economics of pest management have focused almost exclusively on single-species models.  This study develops and implements a methodology with which to evaluate multi-species, non-stochastic, managerial decisions subject to stochastic elements of the plant-insect system.  Multi-species insect management strategies (combinations of scouting interval, threshold value, and choice of pesticide) are analyzed using a physiological mechanistic soybean plant growth model coupled to three insect population dynamics models.  Preliminary results indicate that net returns are maximized and variance is reduced with lower thresholds and more frequent scouting than current recommendations.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1985
URL: http://purl.umn.edu/29987

Are Brazilian corn farmers overconfident about prices?
Provedor de dados: 31
Autores: Cruz Junior,   Jose Cesar.
This paper aims to identify signs of overconfidence among corn producers in south and central-west Brazil. Over the period from October to November 2008, farmers were chosen to answer questions regarding their knowledge of futures markets and price expectations. A large part of subjects responded they do not trade futures contracts because they do not have enough information on the subject. The results show respondents were miscalibrated when estimating directly-stated and the indirectly-stated expected prices. In addition, for certain respondents, subjective variance for corn proves to be significantly less than the market variance. Finally, the paper concludes that the overconfidence effect can partially explain the low use of futures markets by...
Tipo: Conference Paper or Presentation
Palavras-chave: Overconfidence; Subjective probability; Probability elicitation; Institutional and Behavioral Economics.
Ano: 2009
URL: http://purl.umn.edu/49439

In search of drivers for dry sanitation
Provedor de dados: 31
Autores: Rautanen,   Sanna-Leena; Viskari,   Eeva-Liisa.
There is increasing awareness and concern about water pollution and water scarcity, and sanitation has been acknowledged as a critical dimension of both. This paper summarises the findings from the 2nd International Dry Toilet Conference 2006 (DT2006), held 16-19 August, 2006, in Tampere, Finland. The main objective is to publicise a range of research and real life experiences dealing with an uncommon subject: dry sanitation (DS). It was concluded, among other things, that continued technical and institutional development is needed because DS as a decentralised option calls for innovative approaches. Dry toilets based on urine diversion were recommended also for urban areas as urine has high concentrations of both nutrients and such micro-pollutants as...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/48075

PORTFOLIO ANALYSIS CONSIDERING ESTIMATION RISK AND IMPERFECT MARKETS
Provedor de dados: 31
Autores: Dixon,   Bruce L.; Barry,   Peter J.
Mean-variance efficient portfolio analysis is applied to situations where not all assets are perfectly price elastic in demand nor are asset moments known with certainty.  Estimation and solution of such a model are based on an agricultural banking example.  The distinction and advantages of a Bayesian formulation over a classical statistical approach are considered.  For maximizing expected utility subject to a linear demand curve, a negative exponential utility function gives a mathematical programming problem with a quartic term.  Thus, standard quadratic programming solutions are not optimal.  Empirical results show important differences between classical and Bayesian approaches for portfolio composition, expected return and measures of risk.
Tipo: Journal Article
Palavras-chave: Agricultural Finance; Research Methods/ Statistical Methods.
Ano: 1983
URL: http://purl.umn.edu/32102

THE MAXIMISATION OF REVENUE FROM NEW ZEALAND SALES OF BUTTER ON THE UNITED KINGDOM MARKET - A DYNAMIC PROGRAMMING PROBLEM
Provedor de dados: 31
Autores: Townsley,   Robert.
The objective of this paper is to consider and illustrate the potential usefulness of the method of analysis known as Dynamic Programming in one field of market analysis. The illustrative problem solved is that of maximising revenue from New Zealand sales of butter on the United Kingdom market.  Since April 1962 the United Kingdom has restricted imports of butter by placing quotas for twelve month periods on importing countries. It is reasonable to assume that under normal supply conditions, these quotas will be fulfilled. Under abnormal conditions, such as those due to the winter experienced in the Northern Hemisphere in 1962-63, a good market information service should make it possible to predict the expected level of supply of butter from the countries...
Tipo: Journal Article
Palavras-chave: Marketing.
Ano: 1964
URL: http://purl.umn.edu/22662

Some Aspects of Climatic Variability - With Special Reference to Rainfall in New South Wales
Provedor de dados: 31
Autores: Williams,   J.R.
This Department recently received a terse inquiry from a correspondent asking whether rainfall in New South Wales is declining and requesting data indicating average precipitation over periods of ten years. The question whether rainfall is declining, increasing or shows no variation is more than an academic one in a country such as Australia, where average precipitation over large areas is all too low and where agricultural and pastoral activities measure large in its economy. It should be of particular interest to those concerned with future policy not only of agriculture but of such kindred national undertakings as water and soil conservation and afforestation. But the subject is of considerable general interest, and the following is an examination of...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 1946
URL: http://purl.umn.edu/8352

Consumer Perceptions of Genetically Modified Food
Provedor de dados: 31
Autores: Hallman,   William K.; Aquino,   Helen L.
Phone surveys were conducted with 1200 American adults in 2001 and in 2003 designed to track the strength, extent and persistence of consumers' attitudes toward genetically modified food.  The results suggest that most Americans remain largely uninformed about GM foods and the topic is not often the subject of social discourse.  Only 20% of Americans report having had more than one or two conversations about genetically modified foods.  However, the results also suggest that support for GM foods has slipped between 2001 and 2003.  In 2001, 59% of Americans said they thought GM would make their lives better.  Only 39%  had a similar response in 2003.
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer/Household Economics.
Ano: 2003
URL: http://purl.umn.edu/22058

The Effect of Social Desirability Bias on Willingness-To-Pay for Organic Beef.
Provedor de dados: 31
Autores: Cheek,   Lindsey.
Researchers regularly conduct willingness-to-pay or valuation studies for product marketing or public policy purposes. However, a large volume of research suggests valuation tools such as conjoint analysis may be subject to social desirability bias, where subjects misrepresent their true preferences to create a favorable impression. The objective of this study is to measure the effects of social desirability bias on conjoint survey responses. Consumers were asked to rank organic ground beef relative to other ground beef products at various prices. A popular scale measuring individuals’ tendency to exhibit social desirability bias was also administered. Regression analysis found no correlation between individuals’ social desirability scale scores and their...
Tipo: Journal Article
Palavras-chave: Consumer/Household Economics; Livestock Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/113240

The Role of Policy and Industry Structure in India's Oilseed Markets
Provedor de dados: 31
Autores: Persaud,   Suresh Chand; Landes,   Maurice R.
High tariff and nontariff protection of the Indian oilseed sector imposes costs on consumers, supports an inefficient processing industry, and has led to negligible gains in oilseed output. Model-based simulations indicate that higher levels of protection would increase the burden on consumers, but do little to meet key policy goals of supporting producers and reducing import dependence. A shift to direct support of oilseed producer prices would increase output, but may be complex to implement and subject to WTO discipline. Liberalization of oilseed imports, by permitting large gains in processing efficiency, could generate a stream of benefits that would allow producers, consumers, and processors to be better off, and also improve the trade balance.
Tipo: Report
Palavras-chave: India; Oilseeds; Soybeans; Vegetable oil; Meal; Processing industry; Industry structure; Policy; Trade liberalization; Agricultural and Food Policy; Industrial Organization.
Ano: 2007
URL: http://purl.umn.edu/7218

THE NATIONAL INTEREST, WESTMINSTER, AND PUBLIC CHOICE
Provedor de dados: 31
Autores: Johnson,   R.W.M.
There has been increasing scrutiny of government policy decisions and advice in recent years. The supremacy of the national interest has been questioned and self interest theories explored. Administrative systems have been reformed, and the role of the Westminster model of government decision-making endlessly reviewed. Increased interest by economists in the policy process has created a new subject area in economics, namely, public choice theory. It places greater emphasis on individual choice and hence on the way political institutions meet society's needs. It provides a suitable framework for explaining political decision making and administrative processes. In this Address, New Zealand agricultural policies and processes in the last two decades are...
Tipo: Journal Article
Palavras-chave: Public Economics.
Ano: 1994
URL: http://purl.umn.edu/22424

BIODIVERSITY VERSUS TRANSGENIC SUGAR BEET: THE ONE EURO QUESTION
Provedor de dados: 31
Autores: Demont,   Matty; Wesseler,   Justus; Tollens,   Eric.
The decision of whether to release transgenic crops in the EU is one subject to flexibility, uncertainty, and irreversibility.  We analyse the case of herbicide tolerant sugar beet and reassess whether the 1998 de facto moratorium of the EU on transgenic crops for sugar beet was correct from a cost-benefit perspective using a real option approach.  We show that the decision was correct, if households value possible annual irreversible costs of herbicide tolerant sugar beet with about 1 E or more on average.  On the other hand, the total net private reversible benefits forgone if the de facto moratorium is not lifted are in the order of 169 Mio E per year.
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/31859

Land Sales and Rental Markets in Transition: Evidence from Rural Vietnam
Provedor de dados: 31
Autores: Deininger,   Klaus W.; Jin,   Songqing.
Impact and desirability of land transfers in post-socialist transition economies have been subject to considerable debate. We use data from Vietnam to identify factors conducive to the development of land markets and to assess potentially differential impacts of rental and sales. Results show that both rental and sales transfer land to more productive producers but that rental is more important for the poor to access land that becomes available as the non-farm economy develops. The fact that secure land rights significantly increase supply of land to the rental market suggests that government has a key role in facilitating emergence and functioning of efficiency-enhancing land markets.
Tipo: Conference Paper or Presentation
Palavras-chave: Land Economics/Use.
Ano: 2005
URL: http://purl.umn.edu/19359

INSURING AGAINST LOSSES FROM TRANSGENIC CONTAMINATION
Provedor de dados: 31
Autores: Ripplinger,   David G.; Hayes,   Dermot J.; Lamkey,   Kendall R.
Concerns about contamination of the food supply and the financial losses that would result have limited the promise of certain genetically engineered plants. This article addresses the situation by constructing an insurance pricing model to protect against those losses.  The model first estimates the physical dispersal of corn pollen subject to a number of parameters.  This physical distribution is then used to calculate the premium for fair valued insurance that would be necessary to destroy contaminated fields.  The flexible framework can be readily adapted to other crops, management practices, and regions.
Tipo: Conference Paper or Presentation
Palavras-chave: Contemporaneous fertility; Insurance; Lagrangian stochastic model; Pharmaceutical-corn; Pollen dispersal; Crop Production/Industries; Risk and Uncertainty.
Ano: 2004
URL: http://purl.umn.edu/20350

Dairy supply chain restructuring and its impact on farmers' revenues in Poland
Provedor de dados: 31
Autores: Falkowski,   Jan; Malak-Rawlikowska,   Agata; Milkczarek-Andrzejewska,   D.
Supply chain restructuring and its impact on farmers’ situation have become the subject of vast interest among agricultural economists. However, there have been relatively few studies trying to quantitatively asses this issue. This paper analyses the impact of supply chain modernisation on dairy farmers in Poland. It is shown that joining the modern marketing channel positively affects farmers’ revenues. The decision to enter the modern channel is crucially dependent on access to funds and facilitated by having larger cow herds.
Tipo: Conference Paper or Presentation
Palavras-chave: Supply chain; Restructuring; Dairy sector; Poland; Agribusiness; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44060

Taxes, Tax Subsidies and the Impact of Trade Agreements
Provedor de dados: 31
Autores: Perry,   Gregory M.
Tax subsidies are an often overlooked method by which government subsidises agriculture. An examination of tax policies in Australia, Canada, Germany and the United States reveals several different tax subsidies provided to farmers in these countries. Most of these subsidies are in theory subject to reduction under GATT. For various reasons, however, most tax subsidies are not included in subsidy measures. Failure to include these kinds of subsidies in AMS measures could encourage their proliferation among countries desiring to continue agricultural subsidies.
Tipo: Journal Article
Palavras-chave: International Relations/Trade; Public Economics.
Ano: 1995
URL: http://purl.umn.edu/12540

World Heritage Listing of Australian Natural Sites: Effects on Tourism, Economic Value and Conservation
Provedor de dados: 31
Autores: Tisdell,   Clement A.
This article is primarily concerned with the economic consequences of World Heritage listing for the valuation of natural properties and the economic impacts of this listing. Australian data is used to throw light on this subject. Conceptual problems that arise in valuation are explored and several neglected limitations of the travel cost method for estimating the demand for visits to natural sites are mentioned. The importance of economic impact analysis in this context (especially its political ramifications) is given attention. The use of World Heritage listing for political purposes is discussed. It is argued that World Heritage listing favours the long-term conservation of natural properties.
Tipo: Working or Discussion Paper
Palavras-chave: Conservation of natural areas; Economic impact analysis; Economic valuation; Tourism; Travel cost method; World Heritage listing.; Environmental Economics and Policy; L83; Q26; Q57.
Ano: 2010
URL: http://purl.umn.edu/94306

Market Performance of Potato Auctions in Bhutan
Provedor de dados: 31
Autores: van Tilburg,   Aad; Kuiper,   W. Erno; Swinkels,   Rob.
Market performance with respect to a main horticultural export commodity in Bhutan is the subject of this paper. Imperfections in (market) infrastructure and market structure and conduct may prevent an optimal price for farmers. Market performance is assessed by testing the law of one price for this commodity. This is done by testing three series of auction price data on both long-run and short-run price integration. It is concluded that auction prices were interrelated both in the long and short run with one of the three auctions as the price-leading market. Policy implications are suggested.
Tipo: Conference Paper or Presentation
Palavras-chave: Auctions; Bhutan; Law of one price; Market performance; Potato marketing; Marketing; C22; L1; M31; O1; Q13.
Ano: 2006
URL: http://purl.umn.edu/25520

Factor Input Demand Subject to Economic and Environmental Risk: The Case of Nitrogen Fertilizer in Corn Production
Provedor de dados: 31
Autores: Carriker,   Gordon L.
Nitrogen (N) fertilizer demand in relation to economic and environmental risks associated with N-fertilizer management are examined. Both nominal and environmental damage-adjusted net returns distributions are evaluated using stochastic dominance analysis. Results suggest that, in the absence of environmental risk, N demand becomes more elastic as farmers become more risk averse. When environmental risk is introduced to the decision-making process, N demand becomes even more elastic.
Tipo: Working or Discussion Paper
Palavras-chave: Environmental damage; Factor input demand; Nitrogen fertilizer management; Risk; Stochastic dominance; Crop Production/Industries; Environmental Economics and Policy.
Ano: 1993
URL: http://purl.umn.edu/118154

SUBJECTIVE PRODUCTION FUNCTION PARAMETERS AND RISK: WHEAT PRODUCTION IN TUNISIA
Provedor de dados: 31
Autores: Roe,   Terry L.; Nygaard,   David F.
This paper focuses on the problem of decision making when the parameters of the underlying technology are either unknown or are not known with certainty by producers. This problem is considered within the context of Tunisian durum wheat production in Northern Tunisia where farmers ability to accurately perceive the input-output characteristics of both old and new varieties is important to increasing allocative efficiency, decreasing subject risk and encouraging the adoption of high yielding varieties under uncertain climatic conditions.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1979
URL: http://purl.umn.edu/13900

INVESTING IN FARM WORKER HOUSING: A MULTI-SEASON PEAK-LOAD ANALYSIS OF WASHINGTON STATE DATA
Provedor de dados: 31
Autores: Qenani-Petrela,   Eivis; Wandschneider,   Philip R.; Mittelhammer,   Ronald C.; McCluskey,   Jill J.
This paper develops cost effective investment rules for farm worker housing and applies the model to farm worker housing in the state of Washington.  The state must meet varying seasonal farm worker housing needs at minimum expense.  In this study we examine investment rules to choose among different housing technologies in order to minimize the total costs of housing consistent with achieving welfare goals.  The research extends existing peak-load models to the multi-season planning cycle case and applies the approach empirically to a new subject area.
Tipo: Conference Paper or Presentation
Palavras-chave: Labor and Human Capital.
Ano: 2002
URL: http://purl.umn.edu/36553

Producers Cooperative Oil Mill:  A Case Study in Strategic Planning for a Cooperative
Provedor de dados: 31
Autores: Kenkel,   Philip L.; Holcomb,   Rodney B.
This study examines the strategic issues and decisions of Producers Cooperative Oil Mill, a regional oilseed processing cooperative located in Oklahoma City, Oklahoma. The process of strategic planning and strategy implementation in agribusiness has been the topic of numerous research studies and case studies.  While cooperative firms have been the subject of case studies focusing on strategic issues, the unique aspects of strategic decisions in a cooperative firm have not been highlighted.  The formulation and implementation of strategy in cooperative organizations is impacted by their business structure. This case study provides unique examples of how strategy formulation and implementation is impacted by the unique structure and values of a cooperative...
Tipo: Conference Paper or Presentation
Palavras-chave: Cooperative; Strategic planning; Oilseed processing; Agribusiness; Teaching/Communication/Extension/Profession.
Ano: 2011
URL: http://purl.umn.edu/98813

A REVIEW OF CONTRIBUTIONS TO THE WESTERN JOURNAL OF AGRICULTURAL ECONOMICS:  1977-81
Provedor de dados: 31
Autores: Teague,   Paul W.; Ziemer,   Rod F.; Lacewell,   Ronald D.
In this study a complete survey of all WJAE articles was conducted.  The 158 titles that have appeared in the WJAE as of December 1981 are categorized by institutional category, authorship affiliation, and subject category.  These results are compared to similar studies concerning the SJAE and AJAE.  Our findings indicate that the WJAE has a broad range of contributors and is not dominated by any one institution, author, or group of authors.  We feel that these and other interesting results are of general interest to all WJAE readers.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1983
URL: http://purl.umn.edu/32486

DETERMINING OPTIMAL FERTILIZATION RATES UNDER VARIABLE WEATHER CONDITIONS
Provedor de dados: 31
Autores: Talpaz,   Hovav; Taylor,   C. Robert.
This paper presents a theoretical framework for incorporating the following sources of risk into the determination of optimal fertilization rates: (a) the influence of weather and other stochastic factors on the marginal product of fertilizer, and (b) uncertainty about the coefficients of the response function. The decision criterion considered is the maximization of profit subject to a risk constraint on the probability of not recovering the cost of the fertilizer. The theoretical framework is applied to the fertilization of dryland grain sorghum in the Texas Blacklands. Results indicate that the risk averse producer should substantially lower his fertilization rate if soil moisture at fertilization time is low.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1977
URL: http://purl.umn.edu/32333

EFFECTS OF TRADE BARRIERS ON U.S. APPLE EXPORTS
Provedor de dados: 31
Autores: Sreedharan,   Prasanna; Devadoss,   Stephen; Stodick,   Leroy; Wahl,   Thomas I.
We build a spatial equilibrium trade model for apples using demand and supply relations for each importing and exporting country. The model maximizes welfare subject to demand and production constraints. A trade barrier (free trade) scenario which incorporates (removes) import quotas and tariffs is run. Comparison of the solutions of the two scenarios quantifies the impacts of trade barriers on US apple exports.
Tipo: Conference Paper or Presentation
Palavras-chave: Apples; Spatial equilibrium model; Trade barriers; International Relations/Trade; F10.
Ano: 2003
URL: http://purl.umn.edu/22172

Bioeconomic modeling of wetlands and waterfowl in Western Canada: Accounting for amenity values
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis; Withey,   Patrick; Wong,   Linda.
This study extends an original bioeconomic model of optimal duck harvest and wetland retention by bringing in amenity values related to the nonmarket (in situ) benefits of waterfowl plsi the ecosystem values of wetlands themselves. The model maximizes benefits to hunters as well as the amenity values of ducks and ecosystem benefits of wetlands, subject to the population dynamics. Results indicate that wetlands and duck harvests need to be increased relative to historical levels. Further, the socially optimal ratio of duck harvest to wetlands is larger than what has been observed historically. Including amenity values leads to a significant increase in the quantity of wetlands and duck harvests relative to models that focus only on hunting values.
Tipo: Working or Discussion Paper
Palavras-chave: Bioeconomic modelling; Wetland protection; Wildlife management; Nonmarket values; Prairie pothole region; Environmental Economics and Policy; Q57; C61; Q25.
Ano: 2010
URL: http://purl.umn.edu/94936

Impact of Agricultural Research on Poverty Alleviation: Conceptual Framework With Illustrations From the Literature
Provedor de dados: 31
Autores: Kerr,   John M.; Kolavalli,   Shashidhara.
This paper reviews the literature on the subject of the role of improved agricultural technology in alleviating poverty in developing countries. Focusing primarily on improved cultivars produced by the international agricultural research system, it shows how new technology combines with other socioeconomic and institutional factors to determine poverty alleviation outcomes. Technology’s role in alleviating poverty is both indirect and partial; technology alone cannot overcome poverty, nor can continued poverty be blamed on improved technology. The review is organized into three parts in addition to the introduction and conclusion. Part I introduces poverty (Chapter 2) and the achievements of agricultural research (Chapter 3).
Tipo: Working or Discussion Paper
Palavras-chave: Food Security and Poverty; Research and Development/Tech Change/Emerging Technologies.
Ano: 1999
URL: http://purl.umn.edu/42826

When Will Ukraine be a Global Player on World Agricultural Markets?
Provedor de dados: 31
Autores: Zorya,   Sergiy; von Cramon-Taubadel,   Stephan.
Competitiveness has been a subject of considerable attention in agricultural economics. In this paper we study the development of the international competitiveness of Ukrainian crop production between 1996 and 2001 using the concepts of Domestic Resource Cost and Private Cost Ratio. We distinguish between "average" and "best" farms to get a comprehensive picture of farm competitiveness in Ukraine. Our main conclusion is that agriculture responds quickly to incentives, and there are indications that Ukrainian agriculture has entered a phase of dynamic development. A shortage of human capital and physical bottlenecks in grain and oilseeds marketing could limit this development in coming years; if policy makers respond to these risks Ukraine could easily be a...
Tipo: Conference Paper or Presentation
Palavras-chave: Competitiveness; Domestic Resource Cost; Private Cost Ratio; Farm heterogeneity; Eastern Europe; International Relations/Trade.
Ano: 2002
URL: http://purl.umn.edu/24912

INSURANCE MILK
Provedor de dados: 31
Autores: Alston,   Julian M.; Quilkey,   John J.
Where the production of milk for sale on the fresh milk market at 'controlled' prices is subject to nontransferable quotas the holders of quota who wish to maximise profits have a motive to maintain production above the quota level to insure against variations in demand for over-quota sales and yield. The concept of 'production of milk as insurance' is used to clarify the way in which such behaviour gives rise to social costs which could be avoided in a competitive market, by a permissive attitude to arbitrage, or where quotas can be traded.
Tipo: Journal Article
Palavras-chave: Demand and Price Analysis; Livestock Production/Industries.
Ano: 1980
URL: http://purl.umn.edu/22914

U.S. Agricultural Export Credits after the WTO Cotton Ruling: The Law of Unintended Consequences
Provedor de dados: 31
Autores: Benitah,   Marc.
The recent WTO cotton ruling has led to a paradoxical result for the United States, a result that seems a textbook illustration of the "law of unintended consequences". Indeed, during the Uruguay Round negotiations of the present WTO agreements, the United States refused to put agricultural export credits in the category of agricultural export subsidies, where they would then have been subject only to reduction commitments. Paradoxically, the United States finds itself now in a position where these same agricultural export credits that it did not condescend to reduce during the Uruguay Round are openly considered as prohibited export subsidies. This article analyses and criticizes the tortuous legal path followed by the cotton panel before arriving at such...
Tipo: Journal Article
Palavras-chave: Agreement on Agriculture; Brazil; Cotton; Doha Round; Export credits; Export subsidies; SCM; United States; WTO; International Relations/Trade.
Ano: 2005
URL: http://purl.umn.edu/23893

Equilibrium of Land Values from Agricultural and General Economic Factors for Cropland and Pasture Capitalization in Georgia
Provedor de dados: 31
Autores: Flanders,   Archie; White,   Fred C.; Escalante,   Cesar L.
Nonagricultural factors impact land values to cause a divergence of discounted cash rents for agricultural land and land values in Georgia. General economic factors are represented by per capita income in nonmetro areas. Cash rents for cropland and pasture have positive impacts on land values. Nonagricultural factors are stronger influences on land values than are cash rents. Greater effective demand exists for pasture than for cropland because pasture is subject to relatively more pricing pressure in northern counties with higher incomes and population. Increased land values have led to increased net wealth for Georgia agricultural producers.
Tipo: Journal Article
Palavras-chave: Capitalization; Cash rent; Cointegration; Equilibrium; Error correction mechanism; Land values; Land Economics/Use.
Ano: 2004
URL: http://purl.umn.edu/59605

SOME CURRENT ISSUES IN THE MARKETING OF AGRICULTURAL PRODUCTS
Provedor de dados: 31
Autores: Richardson,   Bob.
The subject of 'marketing' as a field of agricultural policy and applied research is discussed in this paper. Agribusiness approaches to marketing advanced in recent years are argued to have made little contribution to policy or research and are rejected in favour of the more traditional framework of applied economic analysis. Developments in government policy on national statutory marketing authorities for agricultural products are appraised along with some evidence on the allocation of research effort revealed in professional journals. It is argued that more research should be conducted on the impact of the promotion of agricultural products and on the efficiency and distributional impact of marketing policies of statutory marketing authorities.
Tipo: Journal Article
Palavras-chave: Marketing.
Ano: 1986
URL: http://purl.umn.edu/22901

CURRENT STATUS OF BENEFITS TRANSFER IN THE U.S.: A REVIEW
Provedor de dados: 31
Autores: Bergstrom,   John C.
Benefits transfer refers to the use of existing benefit estimates in a different, but similar context as compared to the original study which generated the benefit estimates.  Benefits transfer techniques include fixed value transfer, expert opinion, and value estimator models.  Although benefits transfer techniques are subject to a number of conceptual and empirical limitations, these techniques are widely applied in the United States in economic assessments of public policies and projects.  The application of benefits transfer in natural resource damage assessment cases is relatively untested in the United States court system.
Tipo: Working or Discussion Paper
Palavras-chave: Benefits transfer; Conceptual background; United States applications; Research Methods/ Statistical Methods.
Ano: 1996
URL: http://purl.umn.edu/16636

EFFECTIVE RATES OF PROTECTION AND HIDDEN SECTORAL TRANSFERS BY PUBLIC AUTHORITIES
Provedor de dados: 31
Autores: Kolsen,   H.M.
Government intervention changes the allocation of resources through effects on input and output prices. While explicit forms of intervention have been the subject of many studies, implicit forms of intervention have been given much less attention. The price and output policies pursued by public authorities systematically cross-subsidise from densely populated to sparsely populated areas. Thus, their effects are in the opposite direction from the effects of tariffs and quotas. Examination of the effects of one form of intervention in isolation overstates the net effects of that intervention. Effective rates of cross-subsidies must be taken into consideration when attempting to measure the impact of government intervention on resource allocation.
Tipo: Journal Article
Palavras-chave: International Relations/Trade; Public Economics.
Ano: 1983
URL: http://purl.umn.edu/23026

EVIDENCE FOR A WEATHER PERSISTENCE EFFECT ON THE CORN, WHEAT AND SOYBEAN GROWING SEASON PRICE DYNAMICS
Provedor de dados: 31
Autores: Stevens,   Stanley C.
The growing season weather in the corn, wheat and soybean production areas of the United States is an important determinant of the U.S. supply of these commodities.  The weather and climatology literature strongly suggest that during the summer months there is a degree of persistence in the North American weather patterns.  Given this nonrandom character of weather and given that the corn, wheat and soybean belts are geographically concentrated enough to be dominated by a regional weather phenomenon, their futures markets are hypothesized to reflect this assimilation of nonrandom weather information as nonrandom price fluctuations.  An empirical test of this question is the subject of this paper.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Demand and Price Analysis.
Ano: 1990
URL: http://purl.umn.edu/13907

MARKET AND WELFARE EFFECTS OF LIVESTOCK FEED SUBSIDIES IN SOUTHEASTERN NEW MEXICO
Provedor de dados: 31
Autores: Skaggs,   Rhonda K.; Falk,   Constance L.
Input subsidies have the potential to increase production, promote more input use, and impact the environment. Unlike many other federal agricultural subsidies, livestock feed programs have not been the subject of previous economic research. During 1992-96, the U.S. Department of Agriculture paid livestock producers an annual average of $73.2 million in feed subsidies. The objective of this research is to estimate the market and welfare effects of feed subsidies in one region of New Mexico. The price and output effects of the subsidy are found to be small, and the welfare impacts of the subsidy unevenly distributed between subsidized and nonsubsidized producers.
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy.
Ano: 1998
URL: http://purl.umn.edu/31199

"Organic District": identification methodology and agricultural policy objectives
Provedor de dados: 31
Autores: Pancino,   Barbara; Franco,   Silvio; Marino,   Davide.
Italy, unlike other countries, has included the territorial dimension in the recent interventions and regulations of organic agriculture, introducing explicitly the concept of “organic district”. It is defined as a local productive system with a high agricultural vocation where organic production and processing practices are predominant. The main object of this new subject is to promote the diffusion of organic agriculture focusing on the productive and environmental territorial characteristic. In this poster, after a general definition of the organic districts, as they are introduced in the Italian regulations, a method for their identification in a region is proposed. In the final part, some considerations about the role of the organic district within...
Tipo: Conference Paper or Presentation
Palavras-chave: Organic district; Agro-environmental policies; Organic agriculture; Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44192

Agriculture and Environmental Issues in Free Trade Agreements
Provedor de dados: 31
Autores: Colyer,   Dale.
Including environmental issues in trade agreements is controversial, although these issues are an integral part of the NAFTA and WTO agreements as well as being the subject of numerous multilateral environmental treaties and agreements. Despite its inclusion, many members are opposed to allowing the environment an extensive role in the WTO. Nonetheless, the Doha Ministerial Declaration recognizes the environment in negotiating the next trade liberalization agreement. Agriculture and agricultural trade, which were integrated with international trade disciplines in the Uruguay Round, have environmental implications, and the inclusion of agriculture in the WTO introduces complex issues that also have environmental consequences.
Tipo: Journal Article
Palavras-chave: Agriculture; Doha Round; Environment; Trade liberalization; WTO; International Relations/Trade.
Ano: 2003
URL: http://purl.umn.edu/23879

Incorporating Environmentally Compliant Manure Nutrient Disposal Costs into Least-Cost Livestock Ration Formulation
Provedor de dados: 31
Autores: Hadrich,   Joleen C.; Wolf,   Christopher A.; Black,   J. Roy; Harsh,   Stephen B.
Livestock rations are formulated to minimize feed cost subject to nutritional requirements for a target performance level, which ignores the potentially substantial cost of disposing of nutrients fed in excess of nutritional requirements. We incorporate nutrient disposal costs into a modified least-cost ration formulation model to arrive at a joint least-cost decision that minimizes the sum of feed and net nutrient disposal costs. The method is demonstrated with phosphorus disposal costs on a representative dairy farm. Herd size, land availability and proximity, crop rotation, and initial soil phosphorus content are shown to be important in determining phosphorus disposal costs.
Tipo: Journal Article
Palavras-chave: Environmental compliance; Linear programming; Livestock rations; Manure disposal; Agribusiness; Environmental Economics and Policy; Livestock Production/Industries; C61; Q12; Q52.
Ano: 2008
URL: http://purl.umn.edu/45525

The EQIP GIS, Web-based Decision Program
Provedor de dados: 31
Autores: Farnsworth,   Richard L.; Engel,   Bernard; McCloud,   Susan; Choi,   Jin-Yong; Lim,   Kyoung Jae; Theller,   Lawrence.
Working together, NRCS and Purdue University staff developed a GIS, web-based EQIP decision program. Landowners and NRCS personnel enter required EQIP information via a mapping service. Other subroutines store the information for use by NRCS in ranking and funding EQIP applications that receive the highest scores subject to budget constraints.
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/20217

An Allais Measure of Production Sector Waste Due to Quotas
Provedor de dados: 31
Autores: Fulginiti,   Lilyan E.; Perrin,   Richard K.
This paper adapts a partial equilibrium approach of Allais and Diewert to measure the efficiency loss in the producing sector due to quotas.  The measure of waste is the additional profits available for reallocation subject to constraints that the welfare of persons and firms outside the sector is unaffected.  It is relevant to a sector which faces fixed prices for some commodities, but endogenous prices for others.  Tobacco quotas in the United State are estimated to have caused quota-induced producer-sector waste of approximately $95 million per year during 1950-82, or about 3 percent of the average value of the crop.
Tipo: Working or Discussion Paper
Palavras-chave: Waste; Deadweight loss; Production sector; Quotas; Production Economics.
Ano: 1996
URL: http://purl.umn.edu/18566

Public Goods, Hysteresis, and Underinvestment in Food Safety
Provedor de dados: 31
Autores: Richards,   Timothy J.; Nganje,   William E.; Acharya,   Ram N.
Despite the economic damage inflicted by a foodborne disease outbreak, firms at all points in the supply chain appear to be reluctant to invest in the necessary food safety technologies and practices. We argue that these investments are subject to both hysteretic and public good effects, and construct a theoretical model of food safety investment, calibrated to describe the 2006 E. coli outbreak in California spinach. Both effects are found to induce delays in food safety investments, but the public good effect dominates. We suggest a number of policy options that improve incentives to contribute to the public good.
Tipo: Journal Article
Palavras-chave: Food safety; Hysteresis; Investment; Public goods; Real options; Simulation; Food Security and Poverty.
Ano: 2009
URL: http://purl.umn.edu/57627

On-farm Manure Storage Adoption Rates: the Roles of Herd Size, Spreading Acreage and Cost-share Programs
Provedor de dados: 31
Autores: Schuck,   Eric C.
At a time when the general trend in concentrated animal feeding operations (CAFOs) is toward larger herds, proposed policy changes in the United States extend regulation downward to smaller operations and to manure-spreading acreage requirements. These are operations that typically have been subject only to state, not national, environmental regulations. How these smaller operations behave – in particular, what influences their manure handling decisions – is an important question given these proposed regulatory changes. This research examines the factors influencing the decision to adopt on-farm manure storage by smaller CAFOs in North Dakota raising a variety of different livestock.
Tipo: Journal Article
Palavras-chave: Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/46353

What Does the “Family Smoking Prevention and Tobacco Control Act” Mean to Tobacco Growers?
Provedor de dados: 31
Autores: Tiller,   Kelly; Starnes,   Jane H.; Feleke,   Shiferaw T.
The “Family Smoking Prevention and Tobacco Control Act” was signed into law on June 22, 2009. The bill grants the Federal Food and Drug Administration (FDA) an authority to regulate the manufacturing and marketing of tobacco products. Tobacco leaf is not subject to the regulation. As a result, it is not apparent what it does mean to tobacco growers. However, since the demand for tobacco is in large part determined by the demand for cigarettes, a change in demand for cigarettes due to the FDA regulation can affect the demand for tobacco. This paper explores the economic welfare consequences of the bill to tobacco growers.
Tipo: Conference Paper or Presentation
Palavras-chave: Policy; Tobacco; Family Smoking Prevention and Tobacco Control Act; Agricultural and Food Policy; Crop Production/Industries; Demand and Price Analysis; Farm Management.
Ano: 2010
URL: http://purl.umn.edu/56448

Economic valuation of recreational fishing in Western Australia
Provedor de dados: 31
Autores: Raguragavan,   Jananee; Hailu,   Atakelty; Burton,   Michael P.
Allocation of fish resource is a controversial subject. Decision making is partly made difficult by the lack of knowledge on recreational fishing preferences and the value of fishing opportunities. This study investigates fishing site choices in Western Australia. Recreational fishing data covering the eight major fishing regions and fourty eight fishing sites in the State are used. The data are used to estimate a random utility model (RUM) of site choice behaviour with a supporting negative binomial econometric model of angler and fish-specific expected catch rates. We provide value estimates for different fish types, fishing site attribute changes as well as site access values. It is argued that sound economic value estimates can be starkly different...
Tipo: Working or Discussion Paper
Palavras-chave: Non-market valuation; Recreational fishing; Random utility models; Fisheries management; Marine environment management; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/97473

COMPENSATING VARIATION WITHOUT APOLOGY?  WILLINGNESS-TO-PAY AND THE FAILURE OF INTEGRABILITY
Provedor de dados: 31
Autores: Just,   Richard E.; Gilligan,   Daniel O.
Failure of integrability is shown to cause path-dependence of willingness-to-pay measures of welfare change.  Using the linear expenditure system, effects of failure of integrability are negligible (substantial) for estimating income (price) elasticities.  For single price changes, Hausman's approach to calculating willingness to pay from ordinary demands becomes subject to excessive errors of estimation.  For multiple price changes, calculations of willingness to pay become path dependent.  The empirical approach of Vartia to calculation of willingness to pay for multiple price changes thus involves an arbitrary choice of path.  Furthermore, the Willig results justifying consumer surplus approximation fail.
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer/Household Economics; Demand and Price Analysis.
Ano: 1998
URL: http://purl.umn.edu/20814

Resilience in Ecology and Belief
Provedor de dados: 31
Autores: Ranjan,   Ram.
Replaced with revised version of paper 06/18/08.  Former title:  Non-Linearity in Belief and Environmental Risk Dynamics
Tipo: Conference Paper or Presentation
Palavras-chave: Belief dynamics; Ecological hysteresis; Water scarcity; Groundwater dependent ecosystems; Threshold effects; Environmental Economics and Policy; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/5999

COMBINING STATED AND REVEALED PREFERENCE DATA TO CONSTRUCT AN EMPIRICAL EXAMINATION OF INTRAHOUSEHOLD BARGAINING
Provedor de dados: 31
Autores: Dosman,   Donna; Adamowicz,   Wiktor L.
The behavior of households has traditionally been explained by assuming that a single decision maker maximizes utility over all members of the household subject to a budget constraint. This unitary model of household behavior has been questioned and compared to models that assume that household decisions are made in a bargaining process. We examine household behavior in a bargaining framework by combining stated preference information from individual members of the household with revealed preference information on the household's actual choices.  The context of the decision is determining the location of family recreation vacation choice. The resulting model, based on a bargaining framework, provides information on the factors affecting bargaining power as...
Tipo: Working or Discussion Paper
Palavras-chave: Consumer/Household Economics.
Ano: 2002
URL: http://purl.umn.edu/24084

OPTIMAL GROWTH STRATEGIES FOR PASTORAL FIRMS IN THE QUEENSLAND BRIGALOW SCHEME
Provedor de dados: 31
Autores: Harrison,   Stephen R.; Longworth,   John W.
The Brigalow Scheme has been one of Australia's largest dryland development projects since World War II. Large sums of private and public capital have been invested to create 247 new farm firms. Planning the development of these new properties is a complex task. A simulation model of the typical block in Area III of the Brigalow Scheme has been constructed and used to evaluate experimentally the financial performance of various growth strategies. Use of a conjugate directions search procedure with this model has allowed growth strategies to be identified which maximize net worth subject to a low risk of financial failure. These strategies are compared with development programmes which have already been implemented. Significant conclusions are reached both...
Tipo: Journal Article
Palavras-chave: Land Economics/Use.
Ano: 1977
URL: http://purl.umn.edu/22486

An Economic Analysis of Quarantine:  The Economies of Australia's Ban on New Zealand Apple Imports
Provedor de dados: 31
Autores: Arthur,   Matthew.
The quarantine policy decision-making process in Australia is subject to the principles of the World Trade Organisation's SPS Agreement. It is primarily based on the risks and associated economic costs accruing to producers in the event of disease entry. The costs of a quarantine measure in terms of forgone trade benefits are not considered. The impact associated with this asymmetric approach is identified by demonstrating the gains to consumers which may arise through liberalised markets using a case study of the Australian apple industry. A partial equilibrium analysis is used to show the impacts of apple market liberalisation, which can be expected to yield gains to consumers which are greater than the economic costs to on producers.
Tipo: Conference Paper or Presentation
Palavras-chave: Quarantine; Trade; Liberalisation; Apples; Welfare; Food Consumption/Nutrition/Food Safety; International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/31959

Carbon Sequestration in Agricultural Soils: Discounting for Uncertainty
Provedor de dados: 31
Autores: Kurkalova,   Lyubov A.
The study presents a conceptual model of an aggregator who selectively pays farmers for altering farming practices in exchange for carbon offsets that the change in practices generates. Under the assumption that the offsets are stochastic and that the aggregator maximizes the sum of the offsets from the purchase that he/she can rightfully claim with a specified level of confidence subject to a budget constraint, we investigate the optimal discounting of expected carbon offsets. We use the model to estimate empirically the optimal discounting levels and costs for a hypothetical carbon purchasing project in the Upper Iowa River Basin.
Tipo: Working or Discussion Paper
Palavras-chave: Carbon sequestration in agricultural soils; Offset discounting; Uncertainty; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/18551

Unit Value Biases in Meat Demand in Indonesia
Provedor de dados: 31
Autores: Olivia,   Susan; Gibson,   John.
Indonesia is an emerging market for beef and cattle exports so estimates of income and price elasticities may help analysts predict future demands. In contrast to developed countries, where meat demand studies often use aggregate data, Indonesian studies rely on household surveys, with unit values (ratios of expenditures to quantities) used instead of market prices. Elasticities estimated from unit values can be subject to various quality and measurement error biases. In this paper, data from 29,000 households on Java are used to estimate a demand system for beef, chicken and other meat groups, and the extent of bias from commonly used estimation strategies is evaluated.
Tipo: Conference Paper or Presentation
Palavras-chave: Demand and Price Analysis; D12; Q11.
Ano: 2003
URL: http://purl.umn.edu/58195

Pesticide Regulation Under NAFTA: Harmonization in Process?
Provedor de dados: 31
Autores: Badulescu,   Dan; Baylis,   Katherine R.
Different standards in pesticides and pest protection have often been used as trade barriers, whether real or manufactured.  While harmonization is often touted as a means to limit the ability of domestic (protectionist) interests to use standards as a barrier to trade, the process of harmonization itself is subject to rent-seeking.  In this paper, we explore the harmonization of standards that affect pesticide use in NAFTA and ask whether the process is benefiting any groups more than others.   There is evidence that patented pesticide producers have greater access to the harmonization process and may be using harmonization to raise costs to their rivals while preserving their ability to price discriminate.
Tipo: Report
Palavras-chave: International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/24163

Spatial Development
Provedor de dados: 31
Autores: Desmet,   Klaus; Rossi-Hansberg,   Esteban.
We present a theory of spatial development. A continuum of locations in a geographic area choose each period how much to innovate (if at all) in manufacturing and services. Locations can trade subject to transport costs and technology diffuses spatially across locations. The result is an endogenous growth theory that can shed light on the link between the evolution of economic activity over time and space. We apply the model to study the evolution of the U.S. economy in the last few decades and find that the model can generate the reduction in the employment share in manufacturing, the increase in service productivity in the second part of the 1990s, the increase in land rents in the same period, as well as several other spatial and temporal patterns.
Tipo: Working or Discussion Paper
Palavras-chave: Dynamic Spatial Models; Growth; Innovation; Land Rent Evolution; Structural Transformation; Technology Diffusion; Trade; Community/Rural/Urban Development; E32; O11; O18; O33; R12.
Ano: 2010
URL: http://purl.umn.edu/59852

MARKET STRUCTURE AND INNOVATION INTENSITY IN AGRICULTURAL BIOTECH
Provedor de dados: 31
Autores: Schimmelpfennig,   David E.; Pray,   Carl E.; Brennan,   Margaret F.
Consolidations and spin-offs in the agricultural biotechnology industry and the growing links of multinational corporations with the food and feed industry have been the subject of considerable discussion among academics, policy makers, consumers, and farmers.  Most of the research by academic and  overnment institutions has focused on the reasons for consolidation.  Little theoretical or empirical research has examined the impact of this consolidation.  We adapt an endogenous growth model of industry structure and R&amp;D to agricultural biotechnology and empirically estimate the model.   These empirical estimates, the main focus of the paper, indicate that industry consolidation influences the amount and direction of research, which then feeds back to...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Marketing; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/21753

Methodological aspects of research done in contemporary enterprises in the light of disputes between Modernists and Post-Modernists
Provedor de dados: 31
Autores: Boehlke,   Jerzy.
The objective of this paper is to present and analyze preliminary some selected methodological consequences of the disputes held between modernists and post-modernists for the contemporary theory of the firm. There is no doubt that the subject of these disputes constitutes the main axis in the discussion on the structure and functioning of the modern enterprise. In the situation of the intense debate between modernists and post-modernists, it appears that chances of the economic theory of the firm to find explicit answers to the questions on the essence and causes of establishing the enterprise are decreasing. However, at the same time our knowledge on the causes and mechanisms of differentiating enterprises in current market economies is increasing. The...
Tipo: Journal Article
Palavras-chave: Contemporary enterprise; Modernists and post-modernists; Complexity of modern firm; Epistomological analysis; Cognitive economics of firm.; Institutional and Behavioral Economics; B40; B52; L20.
Ano: 2010
URL: http://purl.umn.edu/95931

Supply chain restructuring and its impact on farmers' income - the evidence from dairy sector in Poland
Provedor de dados: 31
Autores: Milczarek-Andrzejewska,   Dominika; Malak-Rawlikowska,   Agata; Falkowski,   Jan; Wilkin,   Jerzy.
Supply chain restructuring and its impact on farmers’ situation have become the subject of vast interest among agricultural economists. However, there have been relatively few studies trying to quantitatively asses this issue. This paper analyses the impact of supply chain modernisation on dairy farmers in Poland. It is shown that joining the modern marketing channel positively affects farmers’ incomes. The decision to enter the modern channel is crucially dependent on access to funds and facilitated by having larger cow herds.
Tipo: Conference Paper or Presentation
Palavras-chave: Supply chain restructuring; Dairy sector; Poland; Agricultural Finance; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44367

Volatilidade dos retornos econômicos associados à integração lavoura-pecuária no estado do Paraná
Provedor de dados: 31
Autores: Lazzarotto,   Joelsio Jose; Santos,   Maurinho Luiz dos; Lima,   Joao Eustaquio de; Moraes,   Anibal de.
In the Brazilian agriculture, there is a great diversity and heterogeneity of production systems that are subject to wide number of factors of risks. Although these risks cannot be completely eliminated, they can be minimized by adopting some strategies, as the diversification with agricultural and cattle activities. Based on the research historical results of the Paraná’s agriculture e with the measurement of the value-at-risk, this work aimed to analyze the volatility of the economic returns of integrated crop-beef cattle systems compared to systems characterized by grain cultivation or beef cattle specialization. As results, we observed that, in the short-term, the integrated crop-livestock system is the alternative that trends to generate better...
Tipo: Journal Article
Palavras-chave: Farm systems; Risk; Value-at-risk; Risk and Uncertainty.
Ano: 2009
URL: http://purl.umn.edu/56860

CREATING, PROTECTING, AND USING CROP BIOTECHNOLOGIES WORLDWIDE IN AN ERA OF INTELLECTUAL PROPERTY
Provedor de dados: 31
Autores: Pardey,   Philip G.; Koo,   Bonwoo; Nottenburg,   Carol.
Proponents tout the positive incentive-to-innovate effects of intellectual property rights (IPRs), while others maintain that the expanding subject matter and geographical extent of IPRs are stifling crop research, especially research and development (R&amp;D) dealing with developing-country crop concerns.  Much of this debate relies on anecdotes and misleading or incomplete evidence on the extent and nature of the IPRs pertaining to crop technologies, including the jurisdictional extent of the property rights and their practice.  In this paper we review the evidence on the scope of agricultural R&amp;D worldwide, provide new data on the structure of crop-related IPRs, and summarize trends on the uptake of proprietary bioengineered crops.
Tipo: Working or Discussion Paper
Palavras-chave: Plant patents; Utility patents; Plant breeders' rights; Crop varieties; Public and private agricultural R&amp;D; Biotechnology; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/13600

The Export Enhancement Program: Prospects Under the Food, Agriculture, Conservation, and Trade Act of 1990
Provedor de dados: 31
Autores: Haley,   Stephen L.
According to provisions of the 1990 U.S. farm bill, the export enhancement program (EEP) will continue to be an important instrument in promoting U.S. agricultural exports and in challenging subsidizing competitors, like the European Community (EC), with funding levels set at a minimum of $500 million annually through 1995. This research, whose purpose is to evaluate the likely effectiveness of the wheat EEP through 1995, reaches several conclusions: (1) the EEP will have a significant effect on U.S. wheat exports, but will be subject to diminishing returns at levels higher than the annual minimums; and (2) the EC will only be marginally affected by the EEP, that is, it can effectively counter the effects of the EEP at low cost.
Tipo: Working or Discussion Paper
Palavras-chave: Export subsidies; Export enhancement program; Agricultural trade; Simulation model; Wheat; Coarse grains; Agricultural and Food Policy; International Relations/Trade.
Ano: 1991
URL: http://purl.umn.edu/51142

DIE VAK LANDBOU-EKONOMIE, LANDBOU-EKONOMIESE NAVORSING, INTERNASIONALE KONVENSIES EN PLANTGENE BRONNE
Provedor de dados: 31
Autores: Blignaut,   C.S.
A cryptic historic background is given of the International Undertaking for Plant Genetic Resources and the Convention on Biological Diversity. Issues evolving from these international deliberations, eg the divide between developed and developing countries are highlighted. An overview is given of the present FAO effort to reconcile the two within the context of Farmers’ Rights, Scope and Access to plant genetic resources for food and agriculture. Attention is paid to real and potential clashes between Farmers’ Rights and farmers’ privileges with Plant Breeders Rights and Trade Related Intellectual Property Rights under UPOV and the WTO. An overview is given of Agenda-21’s multidimensional, conservationistic, developmental and research goals, linked with...
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1998
URL: http://purl.umn.edu/54960

How (not) to Choose Peers in Studying Groups
Provedor de dados: 31
Autores: Gall,   Thomas; Amann,   Roland.
This paper analyzes social group formation when agents are subject to peer effects within groups increasing human capital and instantaneous utility. When agents are heterogeneous on two dimensions, ability and social skills, and monetary payments are not feasible the model predicts segregation at the top and at the bottom of the attribute space and bunching for heterogeneous intermediate types. Groups may be heterogeneous in taste types and more heterogeneous types are more likely to participate. The equilibrium allocation does not induce cost-efficient human capital accumulation. Introducing ability tracking may produce beneficial results despite decreasing differences in human capital production.
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital.
Ano: 2006
URL: http://purl.umn.edu/12158

LAGS IN REAL PROPERTY REVALUATIONS AND ESTIMATES OF SHORTFALLS IN PROPERTY TAX COLLECTIONS IN NORTH CAROLINA
Provedor de dados: 31
Autores: Walden,   Michael L.; Denaux,   Zulal Sogutlu.
Financing local public goods is a major issue in many communities, especially those that have experienced rapid growth.  This paper analyzes problems associated with locally collected real property taxes where the real property tax base is only revaluated at long time intervals.  Using counties in North Carolina as the subject of the analysis, we find that effective real property tax rates fall between revaluations.  We calculate that a system of taxing market values of real property at a constant legislated tax rate would have yielded additional annual revenues of $320 million for North Carolina counties over 1980 to 1995.
Tipo: Journal Article
Palavras-chave: Local public finance; Property taxation; Real property revaluation; Public Economics.
Ano: 2002
URL: http://purl.umn.edu/15511

Conditional Demand System for Beverages
Provedor de dados: 31
Autores: Brown,   Mark G.; Jauregui,   Carlos E.
Estimates of a conditional demand system for twelve beverages, based on the Rotterdam model subject to a full, first-order autoregressive process, are discussed.  Impacts of beverage prices, total beverage expenditures and promotions on beverage quantities demanded are provided.  The results indicate that all beverages were normal goods; the majority had price elastic demands; most had a relatively large own-promotion effect; and a number of significant cross-promotional effects exist, indicating a relatively high level of competition for market share among the beverages studied.
Tipo: Report
Palavras-chave: Conditional demand system; Beverages; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/104335

Marktintegration ohne Gemeinsame Agrarpolitik: Auswirkungen einer Einbeziehung von Agrarprodukten in die Zollunion mit der EU auf den türkischen Agrarsektor
Provedor de dados: 31
Autores: Grethe,   Harald.
Turkey entered a customs union (CU) with the EU in January 1996. Agricultural trade is not covered by this CU but it is subject to extensive preferential trade rules. In this article, the effects of an inclusion of agricultural products in the CU as well as alternative policy options on the Turkish agricultural sector are analysed. To this aim, a comparative-static, partial equilibrium model of the Turkish agricultural sector is developed. The complete liberalization of the agricultural sector is found to lead to significant comparative static welfare gains of about €670 million as compared to the status quo. It appears that for most products, with few but significant exceptions, the inclusion of agriculture in the CU with the EU is very similar to the...
Tipo: Journal Article
Palavras-chave: Turkey; Customs union; Integration of agricultural markets; CAP; Agricultural sector model; Agricultural and Food Policy; International Relations/Trade.
Ano: 2004
URL: http://purl.umn.edu/97455

TESTING FOR AGGREGATION AND SIMULTANEOUS BIAS IN U.S. SOYBEAN EXPORT EQUATIONS
Provedor de dados: 31
Autores: Arnade,   Carlos Anthony; Davison,   Cecil W.
Most previous estimates of elasticities of export demand for U.S. soybeans have emanated from single import equations subject to aggregation and simultaneous equation bias. This analysis tests U.S. soybean export data for aggregation and simultaneous equation bias and divides the aggregated data into six market equations to reduce these biases. Elasticity estimates from the six equations are compared with elasticity estimates from single equation OLS and 2SLS estimations using the same aggregate data. Results suggest that distortions from unjustified 2SLS estimation may exceed those from aggregation bias.
Tipo: Journal Article
Palavras-chave: International Relations/Trade.
Ano: 1989
URL: http://purl.umn.edu/30112

Concept Maps: A Tool for Teachers and Learners
Provedor de dados: 31
Autores: Streeter,   Deborah H.
Concept maps are a tool developed at Cornell University. designed for use as a metacognitive strategy. or a general strategy. that helps the student "learn how to learn." The goal of this paper is to illustrate how concept mapping can be used to integrate multidisciplinary subject maUer. assist the teacher in understanding the knowledge base of the student. reveal misconceptions or missing conceptual links. help resolve communications problems between the student and the professor. and encourage reflective thinking by all participants in the learning process. Three specific teaching situations are presented: 1) preparation of class materials. 2) communication with students in the classroom or the office. and 3) training of a teaching assistant. Examples of...
Tipo: Working Paper
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1991
URL: http://purl.umn.edu/121484

EDUCATIONAL INVESTMENTS IN A SPATIALLY VARIED ECONOMY
Provedor de dados: 31
Autores: Mude,   Andrew G.; Barrett,   Christopher B.; McPeak,   John G.; Doss,   Cheryl R.
This paper presents a simple two-period, dual economy model in which migration options may affect the informal financing of educational investments.  When credit contracts are universally available and perfectly enforceable, spatially varied returns to human capital have no effect on educational investment patterns.  But when financial markets are incomplete and informal mechanisms subject to imperfect contract enforcement must fill the breach, spatial inequality in infrastructure or other attributes that affect the returns to education create spatial differentiation in educational lending and consequently, in educational attainment.  Although migration options can increase the returns to education, they can also choke off the informal finance on which...
Tipo: Working or Discussion Paper
Palavras-chave: Teaching/Communication/Extension/Profession; O1; I1.
Ano: 2003
URL: http://purl.umn.edu/14737

AS BASES SOCIOPOLÍTICAS DO DESENVOLVIMENTO TERRITORIAL: UMA ANÁLISE A PARTIR DA EXPERIÊNCIA FRANCESA
Provedor de dados: 31
Autores: Cazella,   Ademir Antonio.
O objetivo deste artigo consiste em compreender quais são as bases sociopolíticas do pensamento sobre o desenvolvimento territorial levando-se em consideração as diferentes concepções do desenvolvimento. Pretende-se analisar, também, os fundamentos e as contradições, históricos e atuais, subjacentes à consideração do território como elemento ativo de desenvolvimento. Para tanto, o caso francês foi tomado como referência empírica por ser considerado pioneiro nesse domínio.----------------------------------------------The objective of this paper is to understand the socio-political background of the thinking about territorial development, taking into consideration the different conceptions of development. The intention is also to analyze the fundamentals and...
Tipo: Conference Paper or Presentation
Palavras-chave: Desenvolvimento territorial; Descentralização; Participação política; Territorial development; Descentratization; International Development.
Ano: 2008
URL: http://purl.umn.edu/109815

Biodiversity versus Transgenic Sugar Beet: The One Euro Question
Provedor de dados: 31
Autores: Demont,   Matty; Wesseler,   Justus; Tollens,   Eric.
The decision of whether to release transgenic crops in the EU is one subject to flexibility, uncertainty, and irreversibility. We analyse the case of herbicide tolerant sugar beet and reassess whether the 1998 de facto moratorium of the EU on transgenic crops for sugar beet was correct from a cost-benefit perspective using a real option approach. We show that the decision was correct, if households value possible annual irreversible costs of herbicide tolerant sugar beet with about 1 € or more on average. On the other hand, the total net private reversible benefits forgone if the de facto moratorium is not lifted are in the order of 169 Mio € per year.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/25831

Period Equity and Tax Averaging Schemes
Provedor de dados: 31
Autores: Moon,   Lynelle; Peterson,   Deborah C.; Kokic,   Philip; Douglas,   Robert A.
The tax differential caused by variability of taxable income across tax thresholds is estimated for broadacre family farmers using individual taxable income data. Estimates of the tax differential without income averaging are compared with the tax differential under a number of alternative averaging schemes, including the current averaging scheme, modified averaging, block averaging and carry forward tax credits. Only limited evidence is available to indicate the potential tax differential borne by non-primary producers. The availability of such information would assist future analysis of comparative period inequity of farmers and others in the community subject to variable pre-tax incomes.
Tipo: Journal Article
Palavras-chave: Public Economics.
Ano: 1995
URL: http://purl.umn.edu/12543

DIMINISHING MARGINAL VALUE
Provedor de dados: 31
Autores: Horowitz,   John K.; List,   John A.; McConnell,   Kenneth E.
The notion of diminishing marginal value has had a profound impact on the development of neoclassical theory.  Early neoclassical scholars had considerable difficulty convincing contemporaries of the new paradigm's value until political economists, including Jevons and Walras, used the critical assumption of diminishing marginal value to link utility and demand. While diminishing marginal value remains a key component of modern economic intuition, there is surprisingly little empirical verification of its existence or level. This paper gathers field data across a myriad of subject pools--from undergraduate students to PTA members to sportscard enthusiasts--to examine several aspects of preferences in both price and exchange institutions. Examining behavior...
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2004
URL: http://purl.umn.edu/20297

Imperialism, Colonialism and Collaboration in the Social Sciences
Provedor de dados: 31
Autores: Ruttan,   Vernon W.
Prior to the middle of the twentieth century the margins that have demarcated the subject matter of the several social sciences had been relatively stable since the latter decades of the nineteenth century. Since mid-century, however, a number of intellectual and institutional developments have conspired to call into question traditional disciplinary boundaries. In this paper I address the role of disciplinary imperialism, colonialism and collaboration in advancing social science knowledge about development processes and in the design of development policy and institutions. I conclude the paper with several case studies of collaboration across disciplines that have advanced knowledge and practice in the field of development.
Tipo: Working or Discussion Paper
Palavras-chave: International Development.
Ano: 2007
URL: http://purl.umn.edu/7356

Concentration and Specialisation Trends in Germany since Reunification
Provedor de dados: 31
Autores: Suedekum,   Jens.
In this paper we describe the development of regional specialisation and geographical concentration in Germany between 1993 and 2001. Somewhat contrary to theoretical expectations derived from the recent literature in location theory, we neither find compelling evidence for a specialisation process of German regions, nor for a concentration process of industries. By and large and with some exceptions, this conclusion holds both for West Germany and Germany as a whole, as well as for all levels of territorial aggregation (NUTS1-NUTS3). Urban areas are stronger specialised than rural districts, but also subject to faster de-specialisation. Those regions, which have increased regional specialisation against the trend, have performed significantly better in...
Tipo: Working or Discussion Paper
Palavras-chave: Regional Specialisation; Geographical Concentration; Economic Integration; Location Theory; Employment Growth; Germany; Community/Rural/Urban Development; F14; F15; R12.
Ano: 2004
URL: http://purl.umn.edu/26294

A Stochastic Analysis of Proposals for the New US Farm Bill
Provedor de dados: 31
Autores: Binfield,   Julian C.R.; Adams,   Gary M.; Westhoff,   Patrick C.; Young,   Robert E., II.
Most of the large scale modeling systems used in the analysis of agricultural policies produce deterministic projections. In reality, however, the agricultural sector is subject to a high degree of uncertainty as a result of fluctuations in exogenous factors such as the weather or macroeconomic variation. A stochastic approach can provide additional information to policy makers regarding the implications of this uncertainty, through the use of stochastically generated projections. This paper also shows how deterministic analysis may result in systematic errors in the projection of some variables. As an applied example, the FAPRI model of the US agricultural sector is simulated stochastically to analyse the impact of proposals for the new US farm bill.
Tipo: Conference Paper or Presentation
Palavras-chave: Stochastic simulation; US Farm Bill; Policy analysis; Agricultural and Food Policy.
Ano: 2002
URL: http://purl.umn.edu/24913

PUBLIC PERCEPTIONS OF AGRICULTURAL BIOTECHNOLOGY: A SURVEY OF NEW JERSEY RESIDENTS
Provedor de dados: 31
Autores: Hallman,   William K.; Metcalfe,   Jennifer.
Biotechnology is expected to produce significant economic and environmental benefits as a result of the development of new varieties of plants and animals and improved agricultural productivity. Seen by many as a key technology for the 21st century, and as an economic stimulus for the State of New Jersey and for the Nation, biotechnology has been the subject of intense scientific and public debate. Yet, while experts and activists continue to argue, genetic engineering techniques are already leading to agricultural products that may soon be on supermarket shelves.
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1994
URL: http://purl.umn.edu/18170

Nationale 'good practices' voor de VWA: Studie naar drie soortgelijke autoriteiten in Nederland
Provedor de dados: 31
Autores: Wubben,   Emiel F.M.; Hubeek,   Francisca B.
In 2005 researchers from Wageningen UR and LNV DK conducted exploratory research for VWA into the good practices of three inspectorates - PD, IVW-DL and AFM - as part of the review of the financial system, subject to the financial articles, due to be implemented in EU member states on 1 January 2006. In these three cases, the main focus was on the implementation of auditing activities and the method of financing. The findings for these cases and the findings of the cases from EU member states will be used in the scenario study. In all, three reports will be published in the framework of this investigation.
Tipo: Working or Discussion Paper
Palavras-chave: Financial Economics.
Ano: 2006
URL: http://purl.umn.edu/29114

ENGAGING STUDENTS IN RESEARCH:  THE USE OF STRUCTURED PROFESSIONAL DIALOGUE
Provedor de dados: 31
Autores: Garcia,   Philip; Nelson,   Carl H.
Graduate students frequently have difficulty defining, developing, and resolving research problems in a manner consistent with the agricultural economics community. Here, we report on a seminar designed to assist graduate students integrate subject matter courses into independent research proposals through participation in professional dialogue.  Professional dialogue involves developing arguments to explain and resolve questions where the explanations are supported by warranted evidence and appropriately qualified.  The premise of the seminar is that more active problem solvers are developed using professional dialogue to sharpen critical thinking and writing skills.
Tipo: Conference Paper or Presentation
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2003
URL: http://purl.umn.edu/21894

Intergenerationalities: Some Educational Questions on Quality, Quantity and Opportunity
Provedor de dados: 31
Autores: Kanbur,   Ravi.
This paper raises a number of issues in thinking about and addressing the intergenerational transmission of disadvantage. Starting with choice subject to constraints by parents as determining outcomes for children, the paper identifies sequences of interventions to relieve “binding constraints” in the expansion of education. But the fact that parents choose for children is shown to raise a number of questions on normative aspects of inequality measurement. The main conclusions are as follows: (i) A key analytical task is to identify whether education is supply constrained or demand constrained; (ii) The cost-benefit analysis of identifying the “most binding constraint” requires the estimation of an education quality production function; (iii) The recent...
Tipo: Working or Discussion Paper
Palavras-chave: Intergenerationalities; Health Economics and Policy; International Development; Political Economy; Public Economics.
Ano: 2009
URL: http://purl.umn.edu/48922

CAN PRICE SUPPORTS NEGATE THE SOCIAL GAINS FROM PUBLIC RESEARCH EXPENDITURES IN AGRICULTURE?
Provedor de dados: 31
Autores: de Gorter,   Harry; Swinnen,   Johan F.M.
The burgeoning literature on how the benefits from research may be negative for a given price support arbitrarily ignores the costs of price supports for a given level of research. Furthermore, the very existence of price supports is inconsistent with the normative criterion that governments simply maximize social income. We show that there are always gains from research, even if governments maximize social income subject to a farm income goal. Our results are also consistent with the statements made by Schultz and Ruttan that ignoring price supports will result in all over (or under) valuation of research benefits. Finally, we indicate that the predictions of the "no gains from research" literature may not be substantiated by empirical evidence and that...
Tipo: Working or Discussion Paper
Palavras-chave: Demand and Price Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 1994
URL: http://purl.umn.edu/6881

Bridging the economic divide in South African agriculture by improving access to natural resources
Provedor de dados: 31
Autores: Viljoen,   Machiel F.
The paper focuses on improvement in access to the natural resources land and water to bridge the economic divide in South African agriculture. The relevance of the approach to bridging the economic divide, progress made since 1994 in land and water reform and problems experienced and strategies to overcome them are discussed. Challenges imposed by climate change and biodiversity on the effective utilization of land and water resources are also highlighted. Given the broadness of the subject, an overview of some important issues can only be attempted within the allocated time.   The presentation starts with background information to place the discussion in context within the national framework and to define certain concepts. Conceptual issues regarding...
Tipo: Journal Article
Palavras-chave: Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/31733

Procurement Strategies to Improve Quality Consistency in Wheat Shipments
Provedor de dados: 31
Autores: Wilson,   William W.; Dahl,   Bruce L.
Consistency of functional characteristics in wheat is a concern confronting buyers and sellers. This research analyzes the cost and risk of different procurement strategies for importers. A stochastic simulation model is used to determine the probability of functional characteristics being satisfied subject to quality targets and costs for alternative purchase strategies. Stochastic efficiency was employed to identify purchase strategies that dominate others and to determine the extent of preference. As more specific characteristics are incorporated into a contract, results indicate that the probabilities of meeting end-use requirements increase
Tipo: Journal Article
Palavras-chave: Buying strategies; Costs; Functional characteristic tests; Location; Risks; Simulation; Stochastic efficiency; Variety; Crop Production/Industries; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/36708

A CONTENT ANALYSIS OF THE AGRICULTURAL AND RESOURCE ECONOMICS REVIEW
Provedor de dados: 31
Autores: Gempesaw,   Conrado M., II; Albay,   Fe Zinnia.
A content analysis is conducted on the Agricultural and Resource Economics Review the official publication of the Northeastern Agricultural and Resource Economics Association, to determine whether the journal has maintained a strong regional focus and whether there has been a narrow concentration of published articles in subject area and methodology.  The results show that in the 1990s (1) the share of articles that do not focus on the Northeast has increased tremendously and (2) more articles used quantitative techniques than nonquantitative methods.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1996
URL: http://purl.umn.edu/31402

Regulating Ports: competition in South Australian port services for grain
Provedor de dados: 31
Autores: Wilson,   Luke.
Certain port services, called Essential Maritime Services, are subject to price regulation in South Australia. The need for this regulation is now under review, involving a series of assessments of market structures and market power in port services. This paper proposes a framework for assessing market power in port services, to determine whether there is a prima facie case for regulation. Elements of the framework are applied to the grain industry, which is one of the major users of port services in South Australia.
Tipo: Conference Paper or Presentation
Palavras-chave: Ports; Market power; Grain; Crop Production/Industries; Production Economics.
Ano: 2003
URL: http://purl.umn.edu/58270

Predicting the performance of conservation tenders when information on bidders's costs is limited
Provedor de dados: 31
Autores: Schilizzi,   Steven; Latacz-Lohmann,   Uwe.
Buying environmental services from private landholders using tendering mechanisms are usually subject to a budget constraint. Auction theory has mostly focused on target-constrained auctions and is not well developed for this type of auction. This paper examines the predictive capacity of a simple model developed for budget-constrained tenders, already used to design new conservation programs, by submitting it to controlled lab experiments. We study the capacity of the model to predict both experimental bids and the performance of the auction institution, based on the kind of limited information typically available to a conservation agency. We conclude there exists an optimal level of information on bidders’ costs, neither too large nor to small, making...
Tipo: Conference Paper or Presentation
Palavras-chave: Auctions; Procurement; Tenders; Conservation; Learning; Economic experiments.
Ano: 2009
URL: http://purl.umn.edu/48171

Review of the Economics Utilized in the Proposed EPA Regulations of CAFOs
Provedor de dados: 31
Autores: Anderson,   David P.; Smith,   Edward G.; Richardson,   James W.; Knutson,   Ronald D.; Womack,   Abner W.
EPA recently published, for comment, a proposed set of modifications for the regulation of confined animal feeding operations (CAFOs). These proposed regulations require considerably tighter controls over discharges of animal waste. Compliance will require substantial investments by those operations that had not previously been subject to regulation because they did not meet the minimum size requirements. This review of the proposed EPA CAFO regulations results from a request of the House Committee on Agriculture to FAPRI (MO) and AFPC (TX). While designed to evaluate the procedures utilized by EPA in its economic impact statement, it also discusses alternatives for improvements in the analytical impact statement approach in order that the statement may be...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/42729

Milk Market Integration between Hungary and Poland
Provedor de dados: 31
Autores: Bakucs,   Lajos Zoltan; Falkowski,   Jan; Ferto,   Imre.
In this paper we test the retail milk price integration between two countries, Poland and Hungary. Conventional linear cointegration methods do not reveal any relationship between the two prices, therefore we apply Gonzalo and Pitakaris (2006) method to test the linear cointegration null against the threshold cointegration with an exogenous threshold variable alternative hypothesis. Our results show, that the Hungarian Forint – Polish Zloty exchange rate is econometrically an appropriate threshold variable, the linearity null is rejected, and the two alternative regimes may be characterised with different long-run equilibrium relationships. Corresponding trade data however questions the economic appropriateness of the selected threshold variable. Further...
Tipo: Conference Paper or Presentation
Palavras-chave: Horizontal integration; Milk market; Threshold cointegration; Food Security and Poverty.
Ano: 2010
URL: http://purl.umn.edu/91809

THE EFFECTS OF THE INTEREST RATE CEILINGS ON THE MICRO LENDING MARKET IN SOUTH AFRICA
Provedor de dados: 31
Autores: Mohane,   Happy; Coetzee,   Gerhard K.; Grant,   William.
Interest rates are a topical subject in the micro lending industry in South Africa.  The micro lending industry has been accused of charging usurious interest and exploitating the consumers.  This has led to the Department of Trade and Industry passing a Usury Act with an aim of protecting the consumers.  The Act imposes interest rate ceilings on loan finance provided by money lending institutions.  These ceilings are proposed to be linked to the prime rate.  Given this, it is not possible for micro lenders to charge full-cost recovery interest rates.  This paper tries to highlight the effects of interest rate ceilings on the micro finance market.  It argues that the biggest cost component of microlenders is administration costs and not the cost of...
Tipo: Working or Discussion Paper
Palavras-chave: Financial Economics.
Ano: 2002
URL: http://purl.umn.edu/18078

Can We Save the Traditional Family Farm?
Provedor de dados: 31
Autores: Richardson,   James W.; Anderson,   David P.; Smith,   Edward G.
What is a traditional family farm? Is it a family of four living on a farm and supplying all of the labor, capital and management or is it a family corporation with four families supplying all of the capital and management? These types of questions continue to arise in policy debates, as they have for many years. While subject to heated debate and the core of many people’s positions on farm programs the answer is more sociological as it is becoming less and less economically relevant. Whether these types of farms or any other farm sizes should survive is not a question that can be answered by a policy analyst. The job of an analyst is to determine if and under what conditions family farms can survive. To this end, this paper reviews the various definitions...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy.
Ano: 2001
URL: http://purl.umn.edu/42778

THE EFFECT OF A FOREST CONSERVATION REGULATION ON THE VALUE OF SUBDIVISIONS IN MARYLAND
Provedor de dados: 31
Autores: Hardie,   Ian W.; Nickerson,   Cynthia J.
Profit-maximizing land developers are hypothesized to configure subdivisions to minimize the effects of a conservation regulation on developed land values, subject to their expectations about the demand for developed building lots.  This hypothesis allows development of a hedonic price model that takes account of production adjustments.  The model is applied to the Maryland Forest Conservation Act, which requires developers to retain or plant trees on part of the developed land.  Being exempt from the Act allows developers to gain more for the subdivisions they develop: the cost to regulated developers is about six percent of the per-acre price of developed land.  The Act has significantly lowered per-acre developed land values in subdivisions with a...
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/28575

IMPOSING MONOTONICITY AND CURVATURE ON FLEXIBLE FUNCTIONAL FORMS
Provedor de dados: 31
Autores: Wolff,   Hendrik; Heckelei,   Thomas; Mittelhammer,   Ronald C.
Replaced with revised version of paper 05/29/04.
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2004
URL: http://purl.umn.edu/20256

A COMPETITIVIDADE, SEGUNDO A ANÁLISE DE UM GRANDE CLUSTER DE PRODUÇÃO AGROINDUSTRIAL
Provedor de dados: 31
Autores: Sugano,   Joel Yutaka; Santos,   Antonio Carlos dos.
Given that the fast transformations occurred in national and international scenery point out to a necessity of gain of efficiency to increase in competitiveness to the firms, the environment which into they are and into they develop, assume a vital importance as been the supporter foundation of this development. For this environment can be understood as the process of space concentration of many correlative segments of a production chain, also called as clusterization process, which this special conformation gives to the firms special conditions to develops the superior competitive advantages than the others firms isolated. In this sense, this paper aim to arise how occurs the process of conformation of a big cluster, culminating in satisfaction of ten...
Tipo: Journal Article
Palavras-chave: Cluster; Competitiveness; Agribusiness Chain.
Ano: 2000
URL: http://purl.umn.edu/43356

Economic Impact of Hospital Closure on Rural Communities in Three Southern States: Georgia, Tennessee, and Texas. A Quasi-Experimental Approach.
Provedor de dados: 31
Autores: Ona,   Lucia Y.; Freshwater,   David; Hudoyo,   Agus.
The important contribution of hospitals to the economies of rural areas has been the subject of several research studies. The results, however, have been contradictory. This paper analyzes the economic impact of rural hospital closures on rural communities in Georgia, Tennessee, and Texas in the period 1998-2000 by using a quasi-experimental control group method. The results indicate that rural communities that suffered hospital closures were not affected in economic terms relative to those that did not suffer such a closure.
Tipo: Conference Paper or Presentation
Palavras-chave: Health Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/21462

The Law and Economics of Geographical Indications: Introduction
Provedor de dados: 31
Autores: Herrmann,   Roland; Marauhn,   Thilo.
The granting and promotion of Geographic Indicators has become an important component of European Union agricultural policy. The granting of exclusive rights enforced by law, however, is a controversial policy. It is controversial both within the EU and with the EU’s trading partners. The protection of geographical indications has thus become a major issue in international law and trade policy, and the widespread use of geographical indications is subject to ongoing discussion. The paper provides an introduction to the Special Section of the Estey Centre Journal of International Law and Trade Policy, which deals with the legal and economic controversies surrounding the EU’s policies on Geographic Indicators. A brief summary of each of the papers in the...
Tipo: Journal Article
Palavras-chave: Economics; European Union; Geographic Indicators; Law; Food Consumption/Nutrition/Food Safety; International Relations/Trade.
Ano: 2009
URL: http://purl.umn.edu/48789

STOCHASTIC DYNAMIC OPTIMIZATION AND RANGELAND INVESTMENT DECISIONS
Provedor de dados: 31
Autores: Lambert,   David K.; Harris,   Thomas R.
One of the most uncertain resources for a western beef cattle ranch is the availability of reliable spring forage. The impact on ranch equity position and income variability of investments in crested wheatgrass seedings designed to stabilize spring forage supplies is examined. Expected ending net worth under stochastic forage production and cattle prices is maximized subject to secondary safety-first objectives. Seedings increase expected ending net worth and increase annual net ranch incomes after plant establishment.
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries.
Ano: 1990
URL: http://purl.umn.edu/32071

An analysis of Marketing Channels of Local Food in Scotland
Provedor de dados: 31
Autores: Revoredo-Giha,   Cesar; Watts,   D.; Leat,   Philip M.K.
Local food and its possibilities for addressing sustainable regional growth, food availability, accessibility and affordability has received considerable attention in the discussion on and development of the National Food Policy in Scotland. In terms of methodology, the paper continues the analysis of the local food database for Scotland constructed in Watts et al (2010) by exploring the marketing outlets used by the local food enterprises. This subject is important because it may provide information about the degree of entrepreneurship of the involved firms.
Tipo: Conference Paper or Presentation
Palavras-chave: Local food; Scotland; Marketing outlets.; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Labor and Human Capital.
Ano: 2010
URL: http://purl.umn.edu/95223

Price Transmission in the German Sugar Market
Provedor de dados: 31
Autores: Nolte,   Stephan; Natanelov,   Valeri; Buysse,   Jeroen; van Huylenbroeck,   Guido.
The German sugar market is governed by the European Union’s common market organization (CMO). In 2006, the CMO was subject to its first major reform. Among others, the administered price for sugar was reduced by 36%. We use a data set with monthly prices for sugar and sugar containing products to perform a cointegration analysis. Results show that the reduction of the institutional price has led to a reduction of wholesale prices and of retail prices for table sugar. Prices for sugar containing products are barely integrated with the sugar price, though. Some are found to be integrated with the CPI for food and soft drinks. In none of the cases where linear cointegration could not be detected, threshold cointegration could be found.
Tipo: Presentation
Palavras-chave: Sugar; EU’s Common Agricultural Policy; Price Transmission; Co-integration; Demand and Price Analysis; Marketing.
Ano: 2012
URL: http://purl.umn.edu/124351

MORAL HAZARD PROBLEM FOR POOR UNDER JOINT FOREST MANAGEMENT PROGRAMME EVIDENCE FROM WEST BENGAL IN INDIAN CONTEXT
Provedor de dados: 31
Autores: Sarker,   Debnarayan.
This study explores policy framework on current JFM programme, which secures traditional right of local need subject to the carrying capacity of forest, but face moral hazard problem in which Government cannot legally monitor actions against JFM households which live below poverty line and that extract TFPs for their livelihood, and thereby threatening to sustainability of forest, whereas the incentive work opportunities that Government provides them is insufficient for their subsistence. A good incentive fee dependent on their work plus a lump sum fee (subsidy) are required for their livelihood sustenance and sustainability of forest resources.
Tipo: Journal Article
Palavras-chave: Non-Timber Forest Products; Timber Forest Products; Forest wage work; Poor JFM households; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/104644

Future dairy farming systems in irrigation regions
Provedor de dados: 31
Autores: Ho,   Christie K.M.; Nesseler,   R.; Doyle,   Peter T.; Malcolm,   Bill.
The dairy industry in northern Victoria has been subject to rapid change in recent years, resulting in great diversity in the irrigated dairy farming systems in the region. Continuing analysis is needed of the various farming systems that may be viable in the future. This study examined possible development options for different farm systems to enable them to maintain financial viability. Four case studies, representative of different farm systems, were used. All four had options to combat the effects of declining terms of trade. However, the option most suitable for one case study may be unsuitable for another farm due to differences in resources, goals or skills. A key outcome of the study was the development of a robust approach to continually analyse...
Tipo: Article
Palavras-chave: Dairy farming systems; Irrigated dairy; Farm Management.
Ano: 2005
URL: http://purl.umn.edu/123142

SIMULTANEITY OF TECHNOLOGY ADOPTION AND PRODUCTIVITY
Provedor de dados: 31
Autores: Zepeda,   Lydia.
A simultaneous equation generalized probit model is estimated to determine factors affecting technology adoption by California dairy farmers.  Since productivity and technology choice are jointly determined, a single-equation approach to determine whether productivity affects technology adoption is subject to simultaneity bias.  Since the system of equations contains both continuous and discrete endogenous variables, generalized probit is used.  The findings indicate that the biased single-equation estimates tend to exaggerate relationships with explanatory variables, and in some cases, lead to different implications.  This emphasizes the need to use the consistent and asymptotically more efficient generalized probit results to account for simultaneity.
Tipo: Journal Article
Palavras-chave: Productivity Analysis.
Ano: 1994
URL: http://purl.umn.edu/31232

THE IMPORTANCE OF THE CONSERVATION SECURITY ACT TO US COMPETITIVENESS IN GLOBAL ORGANIC MARKETS
Provedor de dados: 31
Autores: Lohr,   Luanne.
This briefing paper reviews the role that the proposed Conservation Security Act plays in improving US competitiveness in global markets for organic agriculture products. The European Union provides direct payments to organic farmers through an agri-environmental program that is considered a "Green Box policy" by the World Trade Organization and not subject to funding limits.  US organic farmers are falling behind due to aggressive production conversion campaigns in the EU.  The Conservation Security Act, which would pay farmers for environmentally sound practices, would counterbalance the EU subsidy program.  With a level field for production support, the US organic industry could be expected to become a dominant market force in the $102 billion global...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy; International Relations/Trade.
Ano: 2001
URL: http://purl.umn.edu/16706

Scheduling and Routing Milk from Farm to Processors by a Cooperative
Provedor de dados: 31
Autores: Prasertsri,   Peerapon; Kilmer,   Richard L.
A milk marketing cooperative (MMC) was created by Florida dairy farmers to link the primary supply of fluid milk with the derived demand of processors in the vertical market. For any given milk supply, the revenue or return to farmers per unit of milk is the average milk price received by the MMC minus the MMC’s transfer cost. An important task for the MMC is to operate the fluid milk hauling system that optimizes the MMC’s milk transfer cost (routing and scheduling cost) subject to farm and plant schedules. The objective of this study is to determine if it is economically feasible to implement a more efficient routing and scheduling of farm-to-plant milk collection by the MMC.
Tipo: Journal Article
Palavras-chave: Cooperatives; Margins; Milk; Routing; Scheduling; Demand and Price Analysis; Productivity Analysis.
Ano: 2004
URL: http://purl.umn.edu/59380

PARETO-IMPROVING WATER MANAGEMENT OVER SPACE AND TIME
Provedor de dados: 31
Autores: Pitafi,   Basharat A.K.; Roumasset,   James A.
Proposals for marginal cost water pricing have often been found to be politically infeasible because current users will have to pay a higher price even though future users will be better off. We show how efficiency pricing can be rendered Pareto-improving, and thus politically feasible, by compensating the users suffering a loss due to higher prices. We also provide a method for determining efficient spatial and inter-temporal water management for a system with consumption at significantly different elevations supplied from a renewable coastal aquifer, which is subject to salinity if over-extracted.
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/20022

DO PROFESSIONAL TRADERS EXHIBIT MYOPIC LOSS AVERSION? AN EXPERIMENTAL ANALYSIS
Provedor de dados: 31
Autores: Haigh,   Michael S.; List,   John A.
Two behavioral concepts, loss aversion and mental accounting, have recently been combined to provide a theoretical explanation of the equity premium puzzle.  Recent experimental evidence suggests that undergraduate students' behavior is consistent with this "myopic loss aversion" conjecture.  Our suspicion is that, much like certain anomalies in the realm of riskless decisions, these behavioral tendencies will be severely attenuated when real market players are put to the task.  Making use of a unique subject pool-professional futures and options pit traders recruited from the Chicago Board of Trade-we do find behavioral differences between professionals and students.  Yet, rather than discovering that the anomaly disappears, the data suggest that...
Tipo: Working or Discussion Paper
Palavras-chave: Marketing.
Ano: 2002
URL: http://purl.umn.edu/28554

STATE ECONOMIC DEVELOPMENT: THE SATURN PROJECT REVISITED
Provedor de dados: 31
Autores: Lindall,   Scott A.
This paper focuses on state economic development efforts with an emphasis on formulating a state economic development strategy.  An analytical framework for regional policy analysis is discussed.  A second framework is presented that outlines criteria for efficient use of state funds.  Economic Base theory is discussed in the appendix, along with Shift-Share Analysis.  States, although generally lacking a comprehensive development strategy, are active in economic development programs.  The "bottom line" in all regional development efforts is enhancement of the productivity of regional resources, particularly human.  To ensure the productive use of state financing, eligible candidates for state assistance are being targeted for export-producing businesses...
Tipo: Working or Discussion Paper
Palavras-chave: Community/Rural/Urban Development.
Ano: 1986
URL: http://purl.umn.edu/13966

Reversing the road to super farms
Provedor de dados: 31
Autores: Furtan,   William Hartley; Karantininis,   Kostas; Lund,   Mogens.
The organization of primary agriculture is dependent upon whether the institutions of a country allow for reverse franchising by farmers. If the transaction costs of managing a farm can be minimized by farmers conducting a form of collective action, such as cooperatives, then the size of farms will be smaller. If farms have to make the products in the firm, which are subject to very large economies of scale than super farms will be the result. The key is the existence of institutions, such as collective action and property rights, that allow for the minimization of costs. For this reason the organization of primary agriculture is, among other things, a public policy issue. In this paper we develop this argument, we sketch a theoretical framework based on a...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Farm Management.
Ano: 2007
URL: http://purl.umn.edu/10025

The Structure of the Milk Hauling Industry in New York and Pennsylvania
Provedor de dados: 31
Autores: Erba,   Eric M.; Pratt,   James E.; Wasserman,   Walter.
A survey of the milk haulers in New York and Pennsylvania was conducted to assess the changes in the northeast milk hauling industry since 1981. Detailed information was collected on characteristics of the hauling businesses as well as the equipment operated. Some of the general topics discussed include the number of hauling businesses, the size of hauling businesses, and the cost of milk hauling equipment. To address the subject of hauling efficiency, a section describing common measures of efficiency is included. Where possible, comparisons have been made to statistics obtained from a similar study completed in 1981.
Tipo: Technical Report
Palavras-chave: Agribusiness; Industrial Organization; Livestock Production/Industries.
Ano: 1993
URL: http://purl.umn.edu/123020

LANDSCAPE CONSERVATION AND ECONOMIC INTERDEPENDENCE:  A CASE-STUDY OF WELSH NATIONAL PARKS AND THE REGIONAL ECONOMY
Provedor de dados: 31
Autores: Midmore,   Peter.
Conservation of the cherished landscapes of National Parks in Britain takes place around the communities which inhabit them. Economic activities of their populations are subject to both constraints and opportunities which the statutory protection provides, with much of the development of economies displaced into their hinterlands. Analysis of spatial relationships between the three National Parks of Wales and the rest of the Wales economy has been explored using a multi-regional input-output model, based on a gravity modelling approach. This allows interregional feedback effects to be monitored and the structural characteristics of interdependence to be explored. Collectively, National Parks make a considerable contribution to the economy of Wales, in...
Tipo: Conference Paper or Presentation
Ano: 2008
URL: http://purl.umn.edu/36864

INCORPORATING STOCHASTIC HARVESTS INTO AN ANALYSIS OF PRODUCTION: THE U.S. ATLANTIC AND GULF OF MEXICO PELAGIC LONGLINE FLEET
Provedor de dados: 31
Autores: Perruso,   Larry; Taylor,   Timothy G.; Larkin,   Sherry L.
Vessel operators maximize expected utility indirectly through cost-minimizing production decisions subject to stochastic harvests. Data on the Atlantic longline fleet, available from NMFS logbooks, is used for the empirical analysis. An ex ante multi-input cost function that incorporates expected rather than realized output levels is estimated and results are reported.
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/19770

A Dynamic Programming Model for On-Farm Decision Making in a Drought
Provedor de dados: 31
Autores: Toft,   H.I.; O'Hanlon,   P.W.
The model, which is based on dynamic programming, enables identification of the sequence of actions in a drought which will lead to the minimum expected cost subject to constraints. The model has been prepared as a tool which may be used to assist graziers to make decisions in a drought. The constraints consist of an upper limit on the number of a particular type of livestock which may be agisted (or droved) in a drought, an upper limit on the number sold and an upper limit on cash outlay. Actions assumed available to the grazier are sale of livestock, agistment (or droving), and supplementary feeding (or allowing mortality).
Tipo: Journal Article
Palavras-chave: Farm Management.
Ano: 1979
URL: http://purl.umn.edu/12550

Food Safety: Inferences for the Scientific Community
Provedor de dados: 31
Autores: Francis,   F.J.
This paper examines the process of determining food safety and its implications for the scientific community. Of the two main categories of food safety, microorganisms and chemicals, the paper focuses on the latter. The importance of chemical use in agriculture is discussed along with public perceptions of such practices. The rapid introduction of new chemicals has outpaced the scientific community’s ability to test for toxicity and interpret its results. Testing and interpretation is confounded by the natural presence of chemicals in food. Limitations of animal experiments are discussed along with problems of calculating and communication risk, the latter being subject to public fear and outrage. The scientific community’s efforts to inform the public...
Tipo: Journal Article
Palavras-chave: Food safety; Food chemicals; Risk assessment; Food science; Science education; Agribusiness; Food Consumption/Nutrition/Food Safety.
Ano: 1995
URL: http://purl.umn.edu/90368

SUCCESS FOR THE WHOLE FOOD CHAIN: TESTING THE MODEL OF NETWORK SUCCESS IN UKRAINE
Provedor de dados: 31
Autores: Gagalyuk,   Taras; Hanf,   Jon Henrich.
B1_4
Tipo: Conference Paper or Presentation
Palavras-chave: Supply Chain Networks; Network Goals; Alignment of Interests; Alignment of Actions; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/93944

On the Economics of Refugee Flows
Provedor de dados: 31
Autores: Stark,   Oded.
Although the phenomenon of refugee flows is not devoid of economic  connotations, it has so far been investigated primarily by political scientists and sociologists. The analytical tools of economic inquiry have not yet been applied to this subject, although it stands to reason that such a study will contribute to our understanding of why refugee flows occur and will guide the policy response. This note illustrates how economic analysis can be brought to bear on three key aspects of refugee flows: fear, poverty, and group movement.
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital; Political Economy.
Ano: 2004
URL: http://purl.umn.edu/18757

VERIFICATION IN CONTRACTS WITH RANDOM CHANGES IN QUALITY
Provedor de dados: 31
Autores: Dimitri,   Carolyn; Lichtenberg,   Erik.
Many goods and services are subject to random changes in quality during the time between sale and delivery, resulting in markets characterized by lemons-market equilibria. We examine two forms of costly verification, ex post inspection and ex ante certification.  In equilibrium, ex post verification is used to verify buyers' reports of low quality, while ex ante certification is used to verify sellers' shipments of high quality.   Ex post inspection allows buyers to earn rents; in some circumstances, ex ante certification allows sellers to earn rents. One would expect buyers to prefer ex post inspection while sellers prefer ex ante certification.
Tipo: Working or Discussion Paper
Palavras-chave: Marketing.
Ano: 2000
URL: http://purl.umn.edu/28565

A REGIONAL MODELING STRUCTURE FOR ASSESSING MANURE MANAGEMENT POLICIES: APPLICATION TO THE CHESAPEAKE BAY WATERSHED
Provedor de dados: 31
Autores: Aillery,   Marcel P.; Gollehon,   Noel R.; Ribaudo,   Marc; Breneman,   Vincent E.
A modeling framework addresses manure management policies within the Chesapeake Bay watershed.  Policy focus is on manure-land application at agronomic rates, as proposed under the EPA/USDA Unified Strategy.  Manure-nutrient flows are assessed subject to assimilative capacity of farmland.  National data bases and GIS coverages facilitate model transferability to other watersheds.
Tipo: Conference Paper or Presentation
Palavras-chave: Manure management; Confined livestock operations; Regional optimization; Chesapeake Bay; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/20530

Analyzing Landowner Demand for Wildlife and Forest Management Information
Provedor de dados: 31
Autores: Munn,   Ian A.; Hussain,   Anwar; West,   Ben; Grado,   Stephen C.; Jones,   W. Daryl.
Determining appropriate topics and target audiences is essential to design effective educational outreach programs.  Based on landowner responses to a mail survey, we determined both the importance and the availability of wildlife and forest management information topics to Mississippi landowners.  Combining this information clearly identified the appropriate subject matter for outreach programs-topics important to landowners and for which information was relatively unavailable.  The importance of wildlife and forest management information relative to its availability depended on the region, land use patterns, and landowner characteristics, thus demonstrating which segments of the population should be targeted to maximize program impact.
Tipo: Journal Article
Palavras-chave: Complementary log-log link; Landowner information needs; Odds ratio; Ordinal regression; Outreach program budget; Land Economics/Use; Resource /Energy Economics and Policy; C25; Q16; Q23; Q26.
Ano: 2007
URL: http://purl.umn.edu/6059

The Political Economy Of Systematic Government Intervention In Agriculture
Provedor de dados: 31
Autores: Sarker,   Rakhal; Meilke,   Karl D.; Hoy,   Michael.
The systematic subsidization and exploitation of agriculture by developed and developing countries respectively, has generated a policy paradox for which there is no satisfactory explanation. This paper attempts to provide an explanation of this policy paradox. It first develops a simple political economy model which treats an interest group's relative political weight as endogenous. Interest groups compete in the political market to improve their relative political weight. This relative political weight appears as a parameter in the government's political preference function. The government maximizes the value of this function subject to the constraints imposed by the economic market to determine the level of a policy. The model is then estimated for...
Tipo: Working Paper
Palavras-chave: Political Economy.
Ano: 1991
URL: http://purl.umn.edu/123574

PRICE-CONDITIONAL TECHNOLOGY
Provedor de dados: 31
Autores: Fulginiti,   Lilyan E.
Economics theorists for years have considered the possibility that the direction of technical change is altered by changes in relative prices.  Prices also have been identified as one of the determinants of technical change through innovation.  This article extends the theory of the firm to cover situations in which the firm’s' technology set is conditional on expected prices.  The basic idea is to distinguish between “"market prices,"” or the prices that guide the firm’s choices subject to the technology that is in place, and “"normal prices,"” the prices conditioning the choice of technology.  A “"generalized”" price effect is obtained that included the traditional price effect as well as the technical change effect of price changes, and an example is...
Tipo: Journal Article
Palavras-chave: Demand and Price Analysis.
Ano: 1994
URL: http://purl.umn.edu/31222

Environmental regulatory arrangements and aquaculture production
Provedor de dados: 31
Autores: Hughes,   Phil; Schuele,   Michael; Weier,   Annette.
Aquaculture production in Australia is subject to an unnecessarily complex array of legislation and agencies - covering environmental protection, land use planning, marine and coastal management, land tenure, and quarantine and translocation. Unwarranted, or poorly developed and implemented, arrangements can impose unnecessary costs on producers, consumers and the community, affect competitiveness, and adversely affect management of the environment. This paper assess environmental regulatory arrangements for aquaculture, identifies potential constraints on the aquaculture industry, and opportunities for improving the efficiency and effectiveness of environmental regulatory arrangements.
Tipo: Conference Paper or Presentation
Palavras-chave: Aquaculture; Regulatory arrangements; Environmental management; Agricultural and Food Policy.
Ano: 2004
URL: http://purl.umn.edu/59367

Does Agriculture Really Matter for Economic Growth in Developing Countries?
Provedor de dados: 31
Autores: Awokuse,   Titus O.
In recent decades, the potential contribution of agriculture to economic growth has been a subject of much controversy among development economists. While some contend that agricultural development is a precondition to industrialization, others strongly disagree and argue for a different path. Taking advantage of recent developments in time series econometric methods, this paper re-examines the question of whether agriculture could serve as an engine of growth. Results from the empirical analysis provide strong evidence indicating that agriculture is an engine of economic growth. Furthermore, we find that trade openness has a positive effect on GDP growth.
Tipo: Conference Paper or Presentation
Palavras-chave: Agriculture; Economic growth; ARDL; Developing countries; Agricultural and Food Policy; Community/Rural/Urban Development; C23; O11; 041.
Ano: 2009
URL: http://purl.umn.edu/49762

AGRICULTURAL EXPERIMENTS AND THEIR ECONOMIC SIGNIFICANCE (II) and DISCUSSION
Provedor de dados: 31
Autores: Lloyd,   Alan G.; Willoughby,   W.M.
This paper discusses what economists want experimenters to do, and why, and criticises existing methods from the economists' viewpoint. The subject has received very little serious attention outside of North America and practically none, as far as I am aware, in Australia. The exception is a valuable critical survey, by Pearse, of the Department of Agriculture's experimental work in a large part of Western Australia. We are concerned in this paper only with certain types of agricultural experiments; namely (i) experiments which investigate physical input-output relationships (such as fertiliser, feeding and stocking rates) and (ii) where the technical data alone does not suffice to indicate an optimum.
Tipo: Journal Article
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1958
URL: http://purl.umn.edu/22468

Conference on Agricultural Sustainability, Growth, and Poverty Alleviation in East and Southeast Asia
Provedor de dados: 31
Autores: Witcover,   Julie; Rosegrant,   Mark W.
This first in a series of regional conferences on this subject brought together more than fifty agricultural scientists and policymakers from China, Indonesia, Malaysia, the Philippines, Thailand, Vietnam, and from international agricultural research centers and the Asian Development Bank to discuss how best to promote "sustainable agricultural intensification"—natural resource management that safeguards productivity of the natural resource base while meeting economic growth and poverty alleviation objectives. The regional conference series began in East and Southeast Asia partly because of the area's already broad experience with intensified farming systems on high potential lands alongside shifting cultivation, or upland or hillside cultivation, on more...
Tipo: Working or Discussion Paper
Palavras-chave: Food Security and Poverty.
Ano: 1995
URL: http://purl.umn.edu/42805

The pass-through of exchange rate changes to the prices of Australian exports of dairy and livestock products
Provedor de dados: 31
Autores: Swift,   Robyn.
Agricultural exports are usually assumed to operate in perfectly competitive international markets, but many are subject to non‐tariff barriers to trade that can affect the degree of pass‐through of exchange rate changes to foreign currency prices. The present study uses multivariate cointegration techniques to examine the effects of exchange rate changes on the prices of Australian exports of milk products, cheese, beef, sheepmeat, and hides and skins. The results indicate that Australian dairy exports operate in competitive markets in which pass‐through is complete, but there is no stable long‐run relationship between exchange rates and prices for any of the other livestock products.
Tipo: Journal Article
Palavras-chave: International Relations/Trade; Livestock Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/117865

Optimal Fertilizer Carryover and von Liebigs Law of the Minimum
Provedor de dados: 31
Autores: Beard,   Rodney.
von Liebigs law of the minimum is frequently proposed as a model of crop production which captures agronomic reality better than substitutional production functions. Whilst many studies of the law of the minimum and optimal fertilizer carryover have been undertaken separately, the law of the minimum for optimal fertilizer carryover has it would appear until now not been analysed, because of the non-differentiable nature of the agricultural producers objective function. In this paper I develop an optimal control model of fertilizer carryover subject to the law of the minimum using the differential inclusion approach to optimal control.
Tipo: Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/123600

Bioeconomic modeling of wetlands and waterfowl in Western Canada: Accounting for amenity values
Provedor de dados: 31
Autores: van Kooten,   G. Cornelis; Withey,   Patrick; Wong,   Linda.
This study extends an original bioeconomic model of optimal duck harvest and wetland retention by bringing in amenity values related to the nonmarket (in situ) benefits of waterfowl plsi the ecosystem values of wetlands themselves. The model maximizes benefits to hunters as well as the amenity values of ducks and ecosystem benefits of wetlands, subject to the population dynamics. Results indicate that wetlands and duck harvests need to be increased relative to historical levels. Further, the socially optimal ratio of duck harvest to wetlands is larger than what has been observed historically. Including amenity values leads to a significant increase in the quantity of wetlands and duck harvests relative to models that focus only on hunting values.
Tipo: Conference Paper or Presentation
Palavras-chave: Bioeconomic modelling; Wetland protection; Wildlife management; Nonmarket values; Prairie pothole region; Environmental Economics and Policy; Q57; C61; Q25.
Ano: 2010
URL: http://purl.umn.edu/61308

Análise do grau de restritividade de exigências técnicas às exportações brasileiras
Provedor de dados: 31
Autores: Faria,   Rosane Nunes de; Burnquist,   Heloisa Lee.
The objective of this investigation was to evaluate to what degree technical requirements restrict Brazilian exports, based on a survey applied to 77 firms. The variables represented six types of technical measures that are usually imposed upon exported products. To facilitate the interpretation of the results, factorial analysis was used to reduce the number of variables involved. This allowed the construction of two indicators of the degree of restrictiveness of the technical barriers focused by the study. These were an indicator of requirements of technical specification (ITS) and an indicator for information and label requirements (IIL). Descriptive statistics and paired t test showed that the firms surveyed considered the ITS more restrictive to their...
Tipo: Journal Article
Palavras-chave: Technical requirements; Survey; Brazilian exports; Restrictiveness indicators; International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/55176

Rural Poverty and Employment Effects of Bt Cotton in India
Provedor de dados: 31
Autores: Subramanian,   Arjunan; Qaim,   Matin.
The impact of genetically modified (GM) crops on the poor in developing countries is still the subject of controversy. While previous studies have examined direct productivity effects of Bacillus thuringiensis (Bt) cotton and other GM crops, little is known about wider socioeconomic outcomes. We use a microeconomic modelling approach and comprehensive survey data from India to analyze welfare and distribution effects in a typical village economy. Bt cotton adoption increases aggregate employment with interesting gender implications. Likewise, aggregate household incomes rise, including for poor and vulnerable farmers, highlighting that Bt cotton contributes to poverty reduction and rural development.
Tipo: Conference Paper or Presentation
Palavras-chave: Biotechnology; Genetically modified crops; Poverty; Rural development; Village economy; Social accounting matrix; Impacts; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Food Security and Poverty; International Development; Production Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/50555

Certainty Equivalence and Bias in the Management of Production
Provedor de dados: 31
Autores: Tisdell,   Clement A.
The study uses Theil's concept of certainty equivalence and bias to analyse the production decisions of the purely competitive firm when some of its inputs are controlled and others are non-controlled and subject to random influences. Conditions are outlined under which a surrogate procedure based upon the expected values of the non-controlled variables leads to certainty equivalence and others under which it leads to bias in the controlled variables. General factors which determine the direction of the bias are discussed. The managerial optimality of the surrogate procedure is investigated and also its welfare implications. The analysis is of particular relevance to agriculture because of the prevalence there of random noncontrolled inputs in production.
Tipo: Journal Article
Palavras-chave: Production Economics.
Ano: 1973
URL: http://purl.umn.edu/9645

Microfinance: Does It Hold Its Promises? A Survey of Recent Literature
Provedor de dados: 31
Autores: Khawari,   Aliya.
Poverty alleviation has been the main target of developmental projects world-wide. However, only a few ideas have stirred so much attention in the last two decades as that of the provision of microfinance through specialised institutions. This paper provides a survey of the vast literature that has developed in this field. Though most of the evidence and literature on the subject appears self-praising, nonetheless there is much more to the concept than one can imagine. The establishment of microfinance institutions (MFIs) world-wide for the provision of collateral free loans to the poor through mechanisms and instruments not known to normal commercial banks has set new milestones in the field of financial services. With 900 million households in the less...
Tipo: Working or Discussion Paper
Palavras-chave: Microfinance institutions; Group lending; Sustainability; Target groups; Financial Economics; 012; 016.
Ano: 2004
URL: http://purl.umn.edu/26394

USING DIRECT QUESTIONING TO VALUE THE EXISTENCE BENEFITS OF PRESERVED NATURAL AREAS
Provedor de dados: 31
Autores: Bennett,   Jeffrey W.
A major limitation to the effectiveness of benefit-cost analyses of proposals involving natural ecosystems is the assertion of existence demand. Not only has confusion arisen regarding its exact definition but little has been done to establish its magnitude. Existence benefits are defined and an empirical study of the value a sample of Canberra residents places on the continued provision of the existence benefits of a particular ecosystem, Nadgee Nature Reserve, is outlined. It is concluded that while the measurement technique employed, the direct questioning of respondents, may be subject to a problem of response bias, it is capable of providing a reasonable estimate of these existence benefits. The average existence value per Canberra adult is at least...
Tipo: Journal Article
Palavras-chave: Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 1984
URL: http://purl.umn.edu/22438

Predicament and Countermeasures for the Management and Maintenance of Rural Water Conservancy Facilities
Provedor de dados: 31
Autores: Kong,   Xi-mei.
The major problem for rural water conservancy facilities during its management and maintenance are in the "been used, under no control" state. And the main reasons of this state are the public belonging property, investment by a single subject, and lack of effective supervision and management mechanism. Since rural water conservancy facilities is used in small scale and has the features of rural "acquaintances community", a balanced long-term interest mechanism for the management and maintenance of rural water conservancy facilities is established for interest-related parties. On short-term view, the most effective measure is to bring the operational status of rural water conservancy facilities into the evaluation indicators of the grass-roots government.
Tipo: Journal Article
Palavras-chave: Rural water conservancy facilities; Management and maintenance; Acquaintances Community; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/108402

Propagation of Annonaceous plants
Provedor de dados: 94
Autores: Ferreira,Gisela; De-La-Cruz-Chacón,Iván; Boaro,Carmen Silvia Fernandes; Baron,Daniel; Lemos,Eurico Eduardo Pinto de.
Abstract  This review aims to present advances in studies on the propagation of the Annonaceae species, which includes species of economic importance such as: soursop, custard apple, atemoya and cherimoya. In sexual propagation, advances are mainly related to a better understanding of the stages of seed development, dormancy mechanisms, and germination. In asexual propagation, compatibility studies between grafts and rootstocks are presented, focusing on the expression of genes involved in tissue formation. The cutting method is also discussed, which is another option for the propagation for this group of plants considered difficult to root, approaching endogenous and exogenous factors related to the subject, as well as management strategies that affect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annonaceae; Seed dormancy; Germination; Grafting; Cutting.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000104002

Development of behavioral studies in Chile between 1984 and 1998
Provedor de dados: 97
Autores: LABRA,ANTONIETA; RAMIREZ,CLAUDIO C.; NIEMEYER,HERMANN M.
The development and the current state of behavioral studies in Chile was analyzed considering articles on Chilean fauna published between 1984 and 1998 (203 articles). The number of articles on the subject of animal behavior has increased significantly along the period studied, indicating an increasing interest on this research. However, the international impact of Chilean research has been comparatively low. Proposals to stimulate the development of this research area in Chile are: i) that main research universities in Chile recruit well-trained behavioral ecologists. This will have immediate impact by increasing the number of courses in animal behavior, which will attract a new generation of biology students into this area, promoting the persistence and...
Tipo: Journal article
Palavras-chave: Animal behavior studies; Chilean fauna.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300001

ชุดตรวจสอบการปลอมปนข้าวหอมมะลิ
Provedor de dados: 106
Autores: Janya Saengkiew; Kongsak Srikaew.
Amylose is one of the indicators to examine the purity of Hom Mali Rice. This research developed the test kit for determination of contaminated Hom Mali Rice. The test kit is based on the blue iodine’s color which is changed in according to amylose content. It was found that the suitable test kit composed of the steps for sample preparation which included preparing milled-white rice before they were subject to lipid removal by washing with ether. Iodine solution was used to develop the color for the prepared samples. The colors of the samples were compared with the established color bands and the levels of contaminations could be judged. The test kit has been evaluated and it was found to be effective.
Tipo: Collection
Palavras-chave: Hom mali rice; Test kit; Amylose; Contamination; Indicators; ข้าวหอมมะลิ; ชุดตรวจสอบการปลอมปน; ปริมาณแอมิโลส; ดัชนีบ่งชี้; การทดสอบการใช้งาน; แถบสี.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5332

Sir Joseph Banks, Soho Square, [London], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Banks, Sir Joseph, baronet.
Thanks for supply of turkeys. Mr Brown visiting Smith on the subject of 'Tetradynamie', praises Brown for the work he has achieved on it. Would like [Sir William Jackson] Hooker to inform Banks where to obtain the "Keland[?]" book with a view to a new translator. Dr Wright visiting Banks and informs him the garden in Edinburgh will advance very fast with the new gardener.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61428/1/JES-COR-1-87_001.tif

James Edward Smith to James Smith
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Arrangements for his and Cousin K's [Nathaniel Kinderley] visit; he means to bring Howlings [his manservant?]. He has sat twice for [John] Rising [(1753-1817), portrait and subject painter], who has much improved his portrait to satisfaction of his sister, Miss Lane, and Sir Abraham Hume. Just received notification of his unanimous election to the Upsal Academy, particuarly pleased as the Swedes can have no partiality to him. Financial arrangements. Corrects mistake of his father's regarding passage of [Jean-Jacques] Rousseau [(1712-1778), philosopher]; of his father's opinion regarding Esther and Fanny's [Smith's sisters] reading of him.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64713/1/JES-SM-5_001.tif

William Roxburgh, 4 Park Place, Edinburgh, to Sir James Edward Smith
Provedor de dados: 24
Autores: Roxburgh, William.
He has been constantly unwell since last seeing Smith; wishes for Smith to superintend the printing his Indian Flora ["Flora Indica"], under Smith's "own man" Taylor. Has had some discussion with [Robert] Brown on subject; they thought it best to translate the generic and specific characters into Latin and leave the rest in English; he is unable to take any active part in it.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64233/1/JES-COR-25-21_001.tif

Matthew Martin, Dawlish, [Devon], to James Edward Smith, Great Marlborough Street, London
Provedor de dados: 24
Autores: Martin, Matthew.
Disappointed to not see his name in "Linnean Transactions" list, which he otherwise enjoyed.  [Respecting Thomas Hoy's paper 'Account of a spinning Limax, or Slug' in "Linnean Transactions" vol 1] not surprised that a land 'Limax' should be found to spin, following his observations of marine animals of that or a neighbouring genus in moving about rock pools; believes that too many dissimilar animals have been confounded under name "insect", remarks in Latin, intends to write further on subject.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64458/1/JES-ADD-71_001.tif

John Stackhouse, Bath, [Somerset], to James Edward Smith
Provedor de dados: 24
Autores: Stackhouse, John.
Encloses small drawing [extant] of the small 'Medusa' he left for him at Linnean Socitey's rooms; observations. Has little knowledge of the Mollusca tribe but would be glad to have it the subject of a paper in "Linnean Transactions". Two small coloured sketches of 'Medusa', one magnified, found adhereing to branch of 'Fucus cricoides' in Mounts Bay, summer 1797.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64286/1/JES-COR-25-74_001.tif

Samuel Goodenough, London, to Sir James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Goodenough, Samuel.
Sorry to hear Smith cannot come to London on 4 May. Spent the last three weeks confined with gout and the "epidemic cold". Sir James Graham of Netherby, his nearest Cumberland neighbour, has died after a ten day illness. [Alexander] Macleay has called a Linnean Society council meeting but not indicated its subject. Enjoying Smith's new work ["English Flora"], hopes to live to see the cryptogamia.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62741/1/JES-COR-12-88_001.tif

Thomas Marsham, Exchequer Loan Office, Royal Exchange, [London], to James Edward Smith
Provedor de dados: 24
Autores: Marsham, Thomas.
Attended a meeting of the Printing Committee with [Samuel] Goodenough and [Jonas] Dryander, where they closed the volume with Smith's paper on 'Salisburia'; Smith's paper on 'Myrti' and [Bracy] Clark's on 'Oestrus' "carry it rather beyond the limits we proposed". The evening meeting was very well attended; list of attendees; after the meeting [John] Rising [(1753-1817), portrait and subject painter] showed Smith's portrait which was "much admired" and a print subscribed to.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64448/1/JES-ADD-61_001.tif

Hugh Davies, Beaumaris, [Anglesey], to James Edward Smith, at Aymler B Lambert's Esq, Lower Grosvenor Street, [London]
Provedor de dados: 24
Autores: Davies, Hugh.
Delayed sending 'Lichen scaber' till Smith was in London; asks for any news of publication of his paper on subject. [Spec 11 written in pencil at top of verso of first folio]
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63878/1/JES-COR-21-101_001.tif

'Materia medica in regno lapideo'
Provedor de dados: 24
Autores: Linné, Carl von.
Copybook with loose sheets, comprising two sets of notes on Linnaeus pater's lectures on 'Materia medica in regno lapideo'. The dissertation "Materia medica in regno lapideo" was defended on 15 May 1752 by Johan Lindhult (1723-1770), with Linnaeus pater as 'praeses'. It consisted of a compendium of 72 mineral substances prescribed by Linnaeus for medicinal needs arranged according to his classification and with pertinent mineralogical and medical data for each. Linnaeus pater's lectures on the subject followed the same structure.  ff. 1-5: first set of note, incomplete, includes numbers 1 ("Silex") to 33 ("Hydragyrum"), very early hand; ff. 6-18: complete set with all 72 mineral substances. With bits of string left onto pages, indicating it was once bound.
Tipo: Collection
Ano: 2023

Edward Forster, London, to Sir James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Forster, Edward.
Sending 'Juncus' specimens from his herbarium, delayed by his comparison with the specimens [James] Bicheno sent to Linnean Society accompanying his paper on subject; observations on species.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63904/1/JES-COR-22-12_001.tif

Francis Boott, Liverpool, [Lancashire], to Sir James Edward Smith, Rodney Street, [Liverpool]
Provedor de dados: 24
Autores: Boott, Francis.
Thanks Smith on subject of epitaph for [Henry] Kirke White [(1785-1806), poet] , unsure whether to speak to [William] Roscoe about it or go with his original intention to "make his monument his name alone". Asks Smith to remind [Edward] Rigby of his promise to Boott should an enlarged edition of "Holkham, its agriculture" be published. Pledges his support to Smith over Cambridge dispute.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61533/1/JES-COR-2-59_001.tif

'Praelectiones publicae ... in propriam materiam medicam ... Pars 2''
Provedor de dados: 24
Autores: Linné, Carl von.
Lectures notes from Linnaeus pater's public lectures on medicinal plants. The lectures were delivered in the autumn term of 1754, and Linnaeus fil.'s notes augmented during lectures on the same subject in the autum term 1757. Title page: 'PRAELECTIONES | PUBLICAE | Illustrissimi et Carissimi | Parentis | in | Propriam Materiam Medicam | Semestri autumnali Anni 1754 | annotatae | a Carolo Linnaeo  | Pars 2.' The 1754 notes were later interleaved with notes from further lectures attended in 1757 and perhaps later. The order and genera numbers follow Linné, Carl von. 1749. "Materia medica Liber I de plantis". Stockholm. The notes beging at 288. "Teucrium" and finish with 535. "Simaruba" and a list of 'Addenda'.  A few ink drawings.
Tipo: Collection
Ano: 2023

Sir Joseph Banks, Soho Square, [London], to Sir James Edward Smith
Provedor de dados: 24
Autores: Banks, Sir Joseph, baronet.
At a loss on the subject of Hermodactyls, [an ancient Greek medicine], but is of the opinion that the gout medicine is composed of that root and that Dr Wilson of Yoxford, Suffolk, who has a medicine similar in taste and smell to that of the French, uses 'Colchicum'. Doubts whether 'Colchicum autumnale' is the same as that used in the Greek Pharmacopoeia. Asks Smith whether any of [John] Sibthorp's papers have any information on the Hermodactyl of the Greeks.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61431/1/JES-COR-1-90_001.tif

Oeconomia Lapponica'
Provedor de dados: 24
Autores: Linné, Carl von.
Title 'Caroli Linnaei  Oeconomia Lapponica' with with subject index. The manuscript is dedicated to the Royal Literary and Scientific Society, Uppsala.  Title page 'Oeconomia Lapponica Linnaei' with seal.  Two drawings for a frontispiece of the Oeconomia Lapponica Linnaei. The second one contains descriptive inscriptions which read, from top left: Eolus; Nebulae tenebrosae (gloomy fogs); Sol inocciduus (never setting sun); fert ubi perpetuas obtutu nives (where he endures in the contemplation of perpetual snows); nix aestivalis (summer snow);  hyems (winter); tu sic fata ferebant (thus they are driven by fate); frustra petebas (you have been assailed without effect); per nemus ignotum non certis passibus errans (wandering through an unknown wood with...
Tipo: Collection
Ano: 2023

Johan Gustaf Acrel, Uppsala, [Sweden], to James Edward Smith
Provedor de dados: 24
Autores: Acrel, Johan Gustaf.
Sending fifth volume of "Transactions of the Royal Scientific Society of Uppsala", via Dr Avent, who is returning to England; wishes there was greater exchange of correspondence between England and Sweden. Smith unanimously elected to Royal Society. Concerned to hear that Smith's letter to a German on subject of sale of Linnaean collections has been disclosed, but gratified Smith wishes he [Acrel] be cleared of all impropriety. Clearance of his debts with Smith. Introduces Dr Bierchen.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61362/1/JES-COR-1-21_001.tif

Thomas Velley, Bath, [Somerset], to James Edward Smith
Provedor de dados: 24
Autores: Velley, Thomas.
Wishes to publish a paper in "Linnean Transactions" on 'Fucus'; it will include an examination of [John] Stackhouse's theories on the subject and expand on a similar paper published by [José Francisco] Corrêa [de Serra] in "Philosophical Transactions of the Royal Society" ['On the Fructification of the Submersed Algae']. Has been compelled to write it after a review of "Nereis Britannica" erroneously stated that Velley's work ["Coloured figures of marine plants"] was written in support of [Carl Friedrich von] Gaertner's [(1772-1850)] theory on the propagation of 'Fucus'. Believes it would compliment similar [Samuel] Goodenough's paper ['Observations on the British Fucus'].
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62476/1/JES-COR-10-46_001.tif

James Yates, Birmingham, [Warwickshire], to Sir James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Yates, James.
Thanks for copy of Smith's "Grammar of Botany"; thinks all the "cultivators of the study of plants in this country [are] under obligations to [Smith] for treating in so clear, candid, and interesting a manner this very interesting view of the subject"; thinks Smith right in maintaining the importance Linnaean artificial system and to adhere to it until classification according to the natural orders is more matured. Also praises Smith's treatment of Linnaeus in supplement to "Encyclopedia Britannica". Intends to visit Smith in the summer.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64381/1/JES-COR-26-76_001.tif

Edward Robson, Darlington, [Durham], to James Edward Smith, 12 Great Marlborough Street, London
Provedor de dados: 24
Autores: Robson, Edward.
Points out errors with the 'Pulmonaria' in "English botany" no.32, which he previously sent Smith specimens of; lists synonyms. Offers to write a paper on subject for "Linnean Transactions".
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64472/1/JES-ADD-85_001.tif

Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith
Provedor de dados: 24
Autores: Woodward, Thomas Jenkinson.
Thanks for "Linnean Transactions" [vol 5]. They have been confined all winter, and Mrs Manning [Woodward's mother-in-law] confined entirely to her room; symptoms; her asthma has changed from dry to moist. Enjoyed Smith's paper on 'Mentha', but without specimens to compare it against will never master the subject; the rest of the volume not so interesting, excepting [William] Kirby's papers, and "scanty".
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63505/1/JES-COR-18-118_001.tif

John Stackhouse, Bath, [Somerset], to Sir James Edward Smith
Provedor de dados: 24
Autores: Stackhouse, John.
Forwards book by [Jean Vincent Félix] Lamouroux [(1779-1825), botanist] Smith purchased off him. Requests Smith's opinion on enclosed 'Ulva' specimen [Smith annotation: "merely 'Fucus saccharinus' rather longe!"]. He has been in Shropshire this summer, studying the larch beetle , which "continues its ravages"; in correspondence with [William] Kirby on subject and will present paper to Linnean Society.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64297/1/JES-COR-25-85_001.tif

James Edward Smith, at R Reeve's Esq, Lowestoft, [Suffolk], to Alexander Macleay, Transport Office, London
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Discussed [Edward] Rudge's paper with [Robert] Brown and [Jonas] Dryander and attempted to call on Rudge to represent to him that he believed "he had been imposed upon by some one having stolen 2 of the plants from Sir Joseph Banks", but he was out. Asks Macleay to send letter on subject; takes it for granted Rudge knew nothing of the theft, which he charges on [Richard] Salisbury.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64559/1/JES-AM-56_001.tif

Sir Joseph Banks, Soho Square, [London], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Banks, Sir Joseph, baronet.
Friendly criticism of Smith's book; wonders whether he relied too much on [Erasmus] Darwin who was "too poetical to be correct" and [William] Forsyth who was "too cunning" to be quite so pure as Smith supposes him. Pleased to hear that the second fasiculum of "Flora Graeca" is to be printed soon. Genus 'Silene' has always been obscure and remarks on this subject will be welcome.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61420/1/JES-COR-1-79_001.tif

Lady East to Sir James Edward Smith, at T Forster's, Clapton, [Middlesex]
Provedor de dados: 24
Anticipating Smith's visit to Hall Place on 6 June. Comments on the dry weather but hopes the woods will be productive for Smith with"all kinds of 'Orchis'". Admonishes Smith for being so "naughty as to talk of flagellation". Postscript by Sir William East requesting Smith to ask Mr Darcy, lecturer at the Royal Institution on electricity, about the new discovery of "gabrenism", including on construction of the necessary apparatus and any worthwhile books on the subject, apparently medicinal in application.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61835/1/JES-COR-4-96_001.tif

Aylmer Bourke Lambert to Sir James Edward Smith
Provedor de dados: 24
Autores: Lambert, Aylmer Bourke.
Thanks for turkey. Compliments Smith on new part of "Flora Graeca" especially 'Dianthi' ['Dianthus'?]. [Samuel Goodenough] and himself agree with Smith on [Robert] Brown, who is making up his mind on an unspecified subject. Asks after Smith's "intersting "Flora"". Received letter from [Alexander von] Humboldt who is working on his "Geography of Plants" and complains of [Aimé] Bonpland having taken specimens. Has just obtained first part of a "Flora of Brazil".
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62070/1/JES-COR-6-95_001.tif

Irreversible costs and benefits of transgenic crops: what are they?
Provedor de dados: 26
Autores: Demont, M.; Wesseler, J.; Tollens, E.
The decision of whether to release transgenic crops in the EU is one subject to flexibility, uncertainty and irreversibility. We analyse the case of herbicide-tolerant sugar beet and estimate the maximum irreversible environmental cost that can be tolerated for this technology from a benefit–cost perspective. Among Member States, these costs range from an annual € 50 to € 212 per hectare planted to transgenic sugar beet, i.e. in the range of 27-80% of the reversible benefits. It is questionable whether the environmental cost of herbicide-tolerant sugar beet would exceed this threshold
Tipo: Conference proceedings
Ano: 2005
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/916

Ocorrência do parasitóide Labena fiorii sp.n. (Hymenoptera, Ichneumonidae) em larvas de Hedypathes betulinus (Klug), broca da erva-mate e em Chydarteres striatus (Fabricius), broca da aroeira, (Coleoptera, Cerambycidae)
Provedor de dados: 104
Autores: Graf,Vinalto; Marzagão,Márcia Ribeiro.
The borer beetle Hedypathes betulinus, plague of "erva-mate" (Ilex paraguariensis St. Hil., 1822), has been subject of study aiming its biological control. Larvae of this insect digs galleries in the stem and branches of this tree, difficulting its control. Labena fiorii sp.n. was found in branches of this tree, parasitizing larvae of Hedypathes betulinus in Teixeira Soares and in "aroeira" (Schinus sp.) in larvae of Chydarteres striatus (Fabricius, 1787) in Curitiba, Paraná, Brazil. Labena fiorii sp.n., from Paraná (Curitiba; Teixeira Soares) and Santa Catarina (Seara, Nova Teutônia) Brazil, is described.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerambycidae; Ichneumonidae; Labena fiorii sp.n.; Erva-mate; Aroeira.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100013

Subulura lacertilia sp.n. (Nematoda, Subuluridae) parasitizing the Brazilian lizard Tropidurus nanuzae Rodrigues (Lacertilia, Tropiduridae)
Provedor de dados: 104
Autores: Vicente,J. Julio; Van Sluys,Monique; Fontes,Angelica F.; Kiefer,Mara Cintia.
This report deals with the identification of samples of nematodes recovered from Tropidurus nanuzae Rodrigues, 1981, with the description of a new species, and is a part of a major study on helminth parasites of reptiles in Brazil, taking into account previous data on this subject. The main approach is that referring to the first occurrence of subulurid nematodes in a reptilian host, since they have been assigned previously to birds and mammals.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nematode; Subulura; Tropidurus; Lizard; Brazil.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400013

Time dependency of hydrogen - ion concentration and electric conductivity measurements in river water samples of Central Amazonia()
Provedor de dados: 36
Autores: Brinkmann,W.L.F.; Santos,A. dos.
Abstract The hypothesis was tested, whether hydrogen — ion concentration and electric conductivity in river water samples of the Tertiary region of central Amazonia were subject to changes in time and due to nature of storage. Over a period of about two months only changes in pH and conductivity of Rio Negro water samples were found to be significant. The total deviation of both parameters in rain forest stream samples was considered negligible for at least a period of 30 days, independant of the nature of storage (laboratory or icebox). The latter results may be generalized more or less unconditionally for the entire Tertiary formations of Amazonia.
Ano: 1971
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671971000200057

Time dependency of hydrogen. Ion concentration and electric conductivity measurements in river water samples of central Amazonia. ()
Provedor de dados: 36
Autores: Brinkmann,W.L.F.; Santos,A. dos.
Abstract The hypothesis was tested, whether hydrogen — ion concentration and electric conductivity in river water samples of the Tertiary region of central Amazonia were subject to changes in time and due to nature of storag. Over a period of about two months only changes in pH and conductivity of Rio Negro water samples were found to be significant. The total deviation of both parameters in rain forest stream samples v/as considered negligible for at least a period of 30 days, independant of the nature of storage (laboratory or icebox). The latter results may be generalized more or less unconditionally for the entire Tertiary formations of Amazonia.
Ano: 1971
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671971000100077

Notas sôbre os gêneros Polygonanthus e Anisophyllea
Provedor de dados: 36
Autores: Pires,João Murça; Rodrigues,William A.
Summary This paper is a contribution to elucidate an obscure problem which involves relationship of a group of plants containing the genera Anisophyllea, Polygonanthus, Combretocarpus and Poga. Genus Anisophyllea is native in both the Old and New Worlds; Polygonanthus is exclusively Amazonian; and Combretocarpus and Poga are confined to the Old World. It is a very interesting subject relating to the problems of evolution, speciation and distribution of plants, and supports the theories which endeavour to explain the centuries-old story that South America and Africa were, at one time, connected geographically. Taxonomic position of genera Anisophyllea and Polygonanthus is discussed. A new species of genus Anisophyllea is described. General characteristics...
Ano: 1971
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671971000200007

Dimeric and dipolar ground state orders in colloidal molecular crystals
Provedor de dados: 42
Autores: Trizac,Emmanuel; El Shawish,Samir; Dobnikar,Jure.
A two dimensional colloidal suspension subject to a periodic substrate evolves into a colloidal molecular crystal under situationsofstrongconfinement. Wefocusonthelongrangeorientationalordertherebyemerging, inthegroundstate. We study by simulations the situations where in each trap lies a pair of identical colloids, or alternatively a pair of oppositelychargedmacroions. We consider square or triangular geometries for the periodic confinement, together with less symmetric distorted lattices.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colloidal molecular crystals; Confined colloidal suspensions; Orientational ordering; Screened Coulomb interactions; Simulated annealing.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000100008

An overview of the Brazilian contributions to Green Analytical Chemistry
Provedor de dados: 42
Autores: GAMA,MARIANA R.; MELCHERT,WANESSA R.; PAIXÃO,THIAGO R.L.C.; ROCHA,FÁBIO R.P.
Abstract: Green Analytical Chemistry (GAC) is a research field that seeks for more sustainable analytical approaches to minimize the toxicity and amounts of wastes without hindering the analytical performance. This is a trend in Analytical Chemistry worldwide and because of the diversity of innovations on this subject, Brazil stands out as the third in the list of the main contributors to GAC, with ca. 11.2% of the published articles. Significant innovations and interesting applications in several fields have been presented and Brazil is continuously moving from Chemistry to Green Chemistry also in the Analytical Chemistry field. Selected contributions for sample preparation, spectro- and electroanalysis, separation techniques, chemometrics, and also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental friendly analytical chemistry; Green chemistry; Miniaturization; Microextractions; Reagentless procedures.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200403

Strategies Towards the Synthesis of N2-Substituted 1,2,3-Triazoles
Provedor de dados: 42
Autores: SOUZA,RODRIGO OCTÁVIO M.A. DE; MIRANDA,LEANDRO S. DE MARIZ E.
Abstract The chemistry of 1,2,3-triazoles gained much attention since the discovery of the copper catalyzed Alkyne-azide cycloaddition (CuAAC) reaction which delivers exclusively the 1,4-regioisomer in high yields. On the other hand there is still no universal methodology capable of delivering the N2 substituted regioisomer. The unique properties of these N2-substituted 1,2,3-triazoles have stimulated synthetic efforts on the developments of methodologies capable of delivering it in high yield and selectivity. These efforts are the subject of the presented review.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 1; 2; 3-Triazoles Heterocycles Regiosselectivity arylation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200401

Contribuição para o conhecimento do lepidóptero saturnídeo Rothschildia arethusa (Walker, 1855)
Provedor de dados: 43
Autores: Zamith,Adiel P. L.; Mariconi,Francisco A. M.
In this paper, the writers present a summary of their investigations on Rothschildia arethusa (Walker, 1855) ( Lepidoptera, Saturniidae ) performed at the Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, State of São Paulo, Brazil. The larva was found to feed on "bacupari do mato" (Rheedia sp.) ( Guttiferae ). Some bionomical notes on the larval and pupal stages and the description of the adult are the mainly subject.
Tipo: Info:eu-repo/semantics/article
Ano: 1962
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761962000100029

Process of fixation, imobilization and mineralization of ammonium in soil using N-15
Provedor de dados: 43
Autores: Saravia,A. M.; Neptune,A. M. Louis.
The organic and inorganic forms of soil nitrogen and how they participate in the process of fixation, immobilization and mineralization of ammonium in soils were evaluated, after different periods of incubaton, utilizing two soils, a Lithic Haplustoll and a Typic Eutrorthox. The results obtained permit to suggest that : 1) The method for determination of the ammonium fixing capacity based on the extraction with 2N KC1, is considered to be subject to interferences of other soil fractions capable of retaining ammonium. 2) The increase in exchangeable ammonium content is related to the decrease in amino acids and hydrolyzable ammonium. 3) The immobilization and mineralization processes are still held under mil microbial. The forms more affected by this...
Tipo: Info:eu-repo/semantics/article
Ano: 1976
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761976000100058

Corte de tubérculos da batatinha: Parte III - Plantio de tubérculos previamente umedecidos
Provedor de dados: 53
Autores: Boock,O. J.
The experiments here recorded deal with the comparison of longitudinally cut seed tubers with whole ones. The results have confirmed those already obtained on the same subject in prior trials, namely, that whole seed tubers yield better than cut ones: a) When whole or cut seed tubers were mois tened before planting, a small, though not statistically significant increase in harvest was observed, possibly, due to fewer failures of germination. b) The cutting of seed tubers on the day of planting gave the lowest production, c) Whole tubers with weight equal to that of the cut halves produced the highest yields and are recommended for use in our conditions.
Tipo: Info:eu-repo/semantics/article
Ano: 1951
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051951000200004

Variedade de batatinha "Eigenheimer" (Solanum tuberosum L.)
Provedor de dados: 53
Autores: Boock,O. J.
The behavior of the Irish potato variety "Eigenheimer" in the State of São Paulo has been studied. This variety grows well under the soil and climatic conditions present in potato areas of this state. Eigenheimer is an early maturing variety and a good yielder. The tubers sprout readily in storage, permitting two plantings in a year to be made with same seed. It is susceptible to virus diseases, early and late blight, bacterial wilt, common scab, and root-knot nematode. It shows a tendency to develop second growth, and under rainy and hot weather is subject to internal brown spot. The tubers of Eigenheimer are deep-eyed, and a large percentage of the crop consists of average and small-sized tubers. Trie marketing value of the Eigenheimer potato equals that...
Tipo: Info:eu-repo/semantics/article
Ano: 1950
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051950001200003

Microbial production of citric acid
Provedor de dados: 52
Autores: Vandenberghe,Luciana P. S; Soccol,Carlos R; Pandey,Ashok; Lebeault,Jean-Michel.
Citric acid is the most important organic acid produced in tonnage and is extensively used in food and pharmaceutical industries. It is produced mainly by submerged fermentation using Aspergillus niger or Candida sp. from different sources of carbohydrates, such as molasses and starch based media. However, other fermentation techniques, e.g. solid state fermentation and surface fermentation, and alternative sources of carbon such as agro-industrial residues have been intensively studied showing great perspective to its production. This paper reviews recent developments on citric acid production by presenting a brief summary of the subject, describing micro-organisms, production techniques, and substrates, etc.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citric acid; Aspergillus niger; Submerged fermentation; Solid state fermentation; Substrates.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000300001

Sugar cane juice fermentation by Zymomonas mobilis CP4 subjected to inhibition by ethanol and high initial concentration of substrate
Provedor de dados: 52
Autores: Tano,Marcia S.; Buzato,João B.; Celligoi,Maria Antonia P. C.
Sugar cane juice fermentation by Z. mobilis CP4 subject to stress by ethanol and high concentration of sucrose was investigated. Supplementation with saponifiable portion of soybean oil deodourising destillate (SOD) at 5; 10 and 15 mL/L.The ethanol production resulted values of 15.91; 16.99 and 15.63 g/L respectively. Values of Yp/s 0.35; 0.36 and 0.37 were achieved, which represented 20.69; 24.14 and 27.59% respectively higher when unsupplemented medium fermentation was carried out.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zymomonas mobilis; Fermentation; Lipids; Ethanol.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400012

Absorbed dose measurements using TLDS in biological samples from beta radiation
Provedor de dados: 52
Autores: Manzoli,José Eduardo; Carvalho,Valdir de Souza; Cerqueira,Eliomar Jacinto Gomes de.
Irradiation of samples in peculiar experimental apparatus, subject to radiation spread, requires a special evaluation of absorbed dose implanted to the sample. Indirect calibration of the irradiation source, obtained in a different apparatus, and the spread, usually of very difficult theoretical evaluation, can cause very serious measurement errors, sometimes reaching 50%. In this work, the procedure for dose evaluation in an apparatus for beta irradiation of samples, usually biological ones,is presented, making use of calibration curves, obtained by irradiation in advance of thermoluminescent detectors in air, and so irradiating them in the same position of the sample. An application in blood sample irradiation is also presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beta irradiation; Beta dosimetry; Thermoluminescence; Biological irradiation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000200008

Grape quality mapping for vineyard differential harvesting
Provedor de dados: 52
Autores: Santos,Antonio Odair; Wample,Robert L.; Sachidhanantham,Sivakumar; Kaye,Oren.
An experiment was carried out from 2005 to 2008, to calibrated NIR-based instrumentation and explore within field grape quality variability and map potential grape quality descriptors along vineyards, as a subsidy for differential harvesting,. The quality indicators (anthocyanin content, pH, titratable acidity and soluble solids) were subject to geo-spatial modeling. Subsequently, the data set was utilized to delineate "within-field" grape quality zone and to determine the timing of the harvest. Differential machine harvesting was implemented and segregation of wine grapes was done "on-the-go". The approach for field prediction of grape quality parameters and zone delineation allowed for separated fermentation for at least two wine styles.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: NIR spectroscopy; Grape; Wine.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200003

Neurologic complications of HIV in the HAART era: where are we?
Provedor de dados: 55
Autores: Silva,Monica M. Gomes da.
Human immunodeficiency virus (HIV)-associated neurological complications continue to occur despite the development in antiretroviral treatment. New forms of old opportunistic infections and increased prevalence of neurocognitive disorders are the challenges that infectious diseases specialists face in daily clinic. How to screen and treat these disorders are subject of debate and new studies are underway to answer these questions. This review focuses on a brief discussion about opportunistic infections still present in late diagnosed HIV-infected patients and describes new forms of HIV-related neurological complications.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HIV; Neurological complication; HAND; Cognitive impairment.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000400011

Biophysical characteristics of gap junctions in vascular wall cells: implications for vascular biology and disease
Provedor de dados: 56
Autores: Brink,P.R.; Ricotta,J.; Christ,G.J.
The role gap junction channels play in the normal and abnormal functioning of the vascular wall is the subject of much research. The biophysical properties of gap junctions are an essential component in understanding how gap junctions function to allow coordinated relaxation and contraction of vascular smooth muscle. This study reviews the properties thus far elucidated and relates those properties to tissue function. We ask how biophysical and structural properties such as gating, permselectivity, subconductive states and channel type (heteromeric vs homotypic vs heterotypic) might affect vascular smooth muscle tone.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vascular smooth muscle; Gap junctions.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000400007

Parasitic infections in germfree animals
Provedor de dados: 56
Autores: Vieira,L.Q.; Oliveira,M.R.; Neumann,E.; Nicoli,J.R.
The association of vertebrate hosts with the indigenous microbiota and its effect on the response to infections has long been a subject of scientific curiosity. From the first theory supported by Louis Pasteur that life would be impossible in the absence of associated microorganisms to the development of germfree mammals for research, a lot was learned about how the normal microbiota influences the environment in which pathogens may find themselves. In the present review, we attempt to summarize the more recent results from our group and others on the influence of the normal microbiota on the outcome of parasitic infections. Our results and those of others point to a complex relationship between the mammalian system and its indigenous microbiota, leading...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germfree; Microbiota; Gnotobiotic; Infection; Leishmania; Trypanosoma.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100013

Growth of enterotoxin producing Bacillus cereus in meat substrate at 10ºC and 30ºC
Provedor de dados: 58
Autores: Soares,Celina Mara; Kabuki,Dirce Yorika; Kuaye,Arnaldo Yoshiteru.
The behaviour of enterotoxin-producing Bacillus cereus in meat was investigated by inoculating spore suspensions of five cultures into meat substrate (pH 5.8) and incubating at 10ºC and 30ºC. The bacterial populations were evaluated after different times by plate counts in nutrient agar. All the cultures presented growth at 30ºC with the generation time varying from 28.8 to 36.0 minutes. Three cultures also presented growth at 10ºC with generation times between 10.16 and 28.38 h. Considering the results, it was concluded that meat kept at abusive temperatures would be subject to development of this microorganism.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus cereus; Meat; Growth.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400022

Ecuador Debate [no. 86, agosto 2012. REVISTA COMPLETA]
Provedor de dados: 122
Autores: Centro Andino de Acción Popular (CAAP).
En las últimas décadas, las ciencias sociales se han visto desafiadas por discusiones que han puesto atención a teorizaciones y búsquedas epistemológicas en un ambiente de cuestionamiento a los límites disciplinarios. Es así que ha reaparecido la problemática del sujeto tratada muchas veces de modo superficial o confusamente en reemplazo de conceptos tales como actor social. El Tema Central de este número de la revista contiene algunos artículos dedicados a tratar el sujeto, con énfasis en las elaboraciones de la filosofía clásica y de las corrientes teóricas del psicoanálisis.
Tipo: Artículo
Palavras-chave: POLÍTICA; SOCIEDAD; ANTROPOLOGÍA; PSICOANÁLISIS; SUJETO; FILOSOFÍA CONTEMPORÁNEA; EMPLEO RURAL; POPULISMO; ASAMBLEA CONSTITUYENTE 1938; POLICY; SOCIETY; ANTHROPOLOGY; PSYCHOANALYSIS; SUBJECT; CONTEMPORARY PHILOSOPHY; RURAL EMPLOYMENT; POPULISM; CONSTITUENT ASSEMBLY 1938; ECUADOR.
Ano: 2012
URL: http://hdl.handle.net/10469/4516

Las Ciencias Sociales son las ciencias de la verdad del sujeto (Metodología)
Provedor de dados: 122
El Autor Manuel Martín Serrano, muestra que los Racionalistas coincidían con sus antecesores utopistas, cuando interpretan que la felicidad de los hombres es el criterio para juzgar sobre la racionalidad de las instituciones sociales. Las ciencias sociales siguen disputadas entre quienes pretenden hacer de ellas el saber aplicado a la interiorización de los roles y estatus, y quienes las entienden como la ciencia crítica que saca a la luz las resistencias que se oponen a la exteriorización de la creatividad y del gozo.
Tipo: Artículo
Palavras-chave: CIENCIAS SOCIALES; SUJETO; SOCIOLOGÍA; SOCIAL SCIENCIES; SUBJECT; RESUMEN; ABSTRACT.
Ano: 2011
URL: http://hdl.handle.net/10469/4748

La literatura y la metafísica del Sujeto (Tema Central)
Provedor de dados: 122
Autores: Albán, Fernando.
“Que es la literatura” de Jean-Paul Sartre es un texto que ofrece importantes reflexiones sobre el Sujeto. Sartre postula que la libertad de escribir implica la libertad del ciudadano. En tanto que la libertad está enraizada en la subjetivación del Sujeto, responde a una estructura intencional.  En la política del arte, el artista debe transmitir un saber y un poder hacer, que pasa por la supresión de la libertad de los signos, al espectador, quien debe hacer suyo ese poder al objetivar aquello que se encontraba premodelado en la vasta y libre subjetividad del autor.
Tipo: Artículo
Palavras-chave: SUJETO SOCIAL; LITERATURA; METAFÍSICA; LIBERTAD; SUBJETIVIDAD; CIUDADANO; SUBJECT SOCIAL; LITERATURE; METAPHYSICS; FREEDOM; SUBJECTIVITY; CITIZEN.
Ano: 2012
URL: http://hdl.handle.net/10469/4572

Construcción identitaria del sujeto (Tema Central)
Provedor de dados: 122
Autores: Steichen, Robert.
El sujeto se construye en el lenguaje como un articulador del individuo en sus relaciones con su mundo subjetivo. Se propone un análisis de los modos de identidad individual, personal y subjetiva que tiene como marco de referencia el psicoanálisis. Para ello, se exploran los referentes constitutivos del mundo íntimo y sexual de los individuos.
Tipo: Artículo
Palavras-chave: IDENTIDAD INDIVIDUAL; IDENTIDAD SUBJETIVA; IDENTIDAD SEXUAL; SUJETO SOCIAL; IDENTIDADES; FAMILIA; INDIVIDUAL IDENTITY; SUBJECTIVE IDENTITY; SEXUAL IDENTITY; SUBJECT SOCIAL; IDENTITIES; FAMILY.
Ano: 2012
URL: http://hdl.handle.net/10469/4565

La modernidad mirada desde el psicoanálisis (Entrevista)
Provedor de dados: 122
Autores: Ecuador Debate.
Entrevista a Alfredo Jerusalinsky. Cuando el psicoanálisis mira el mundo moderno qué ve? Lo que el psicoanálisis nos permite percibir del mundo moderno son los supuestos subjetivos en los que se apoya su organización cultural, su producción cultural. Hay tres supuestos básicos en la modernidad, el primero es el de que es posible transformar todo saber en conocimiento, el segundo es el de la autonomía del sujeto y el tercero es de que la verdad viene del objeto; son tres supuestos básicos de la modernidad, que tienen consecuencias.
Tipo: Artículo
Palavras-chave: PSICOANÁLISIS; AUTONOMÍA; MODERNIDAD; SUBJETIVIDAD; ORGANIZACIÓN; CULTURA; CONOCIMIENTO; IGNORANCIA; SUJETO-OBJETO; PSYCHOANALYSIS; AUTONOMY; MODERNITY; SUBJECTIVITY; ORGANIZATION; CULTURE; KNOWLEDGE; IGNORANCE; SUBJECT-OBJECT; ECUADOR; BRASIL.
Ano: 2002
URL: http://hdl.handle.net/10469/4912

Construcción identitaria del sujeto (Tema Central)
Provedor de dados: 122
Autores: Steichen, Robert.
El sujeto se construye en el lenguaje como un articulador del individuo en sus relaciones con su mundo subjetivo. Se propone un análisis de los modos de identidad individual, personal y subjetiva que tiene como marco de referencia el psicoanálisis. Para ello, se exploran los referentes constitutivos del mundo íntimo y sexual de los individuos.
Tipo: Artículo
Palavras-chave: IDENTIDAD INDIVIDUAL; IDENTIDAD SUBJETIVA; IDENTIDAD SEXUAL; SUJETO SOCIAL; IDENTIDADES; FAMILIA; INDIVIDUAL IDENTITY; SUBJECTIVE IDENTITY; SEXUAL IDENTITY; SUBJECT SOCIAL; IDENTITIES; FAMILY.
Ano: 2012
URL: http://hdl.handle.net/10469/4565

Contingencias del concepto de sujeto en las humanidades y las disciplinas sociales (Tema Central)
Provedor de dados: 122
Autores: García Wong, Guillermo.
La noción de sujeto en las ciencias sociales tiene un origen en las reflexiones de la filosofía clásica y moderna. Las definiciones del sujeto en el psicoanálisis desafían a las elaboraciones de las ciencias sociales al proponer las dimensiones del inconsciente y el lenguaje como elementos constitutivos del individuo. no obstante, queda abierta una discusión sobre las relaciones del psicoanálisis y las ciencias sociales en la definición del sujeto.
Tipo: Artículo
Palavras-chave: CIENCIAS SOCIALES; FILOSOFÍA; EDUCACIÓN; SUJETO; DERECHO; SOCIOLOGÍA; SOCIAL SCIENCES; PHILOSOPHY; EDUCATION; SUBJECT SOCIAL; LAW; SOCIOLOGY.
Ano: 2012
URL: http://hdl.handle.net/10469/4574

La modernidad mirada desde el psicoanálisis (Entrevista)
Provedor de dados: 122
Autores: Ecuador Debate.
Entrevista a Alfredo Jerusalinsky. Cuando el psicoanálisis mira el mundo moderno qué ve? Lo que el psicoanálisis nos permite percibir del mundo moderno son los supuestos subjetivos en los que se apoya su organización cultural, su producción cultural. Hay tres supuestos básicos en la modernidad, el primero es el de que es posible transformar todo saber en conocimiento, el segundo es el de la autonomía del sujeto y el tercero es de que la verdad viene del objeto; son tres supuestos básicos de la modernidad, que tienen consecuencias.
Tipo: Artículo
Palavras-chave: PSICOANÁLISIS; AUTONOMÍA; MODERNIDAD; SUBJETIVIDAD; ORGANIZACIÓN; CULTURA; CONOCIMIENTO; IGNORANCIA; SUJETO-OBJETO; PSYCHOANALYSIS; AUTONOMY; MODERNITY; SUBJECTIVITY; ORGANIZATION; CULTURE; KNOWLEDGE; IGNORANCE; SUBJECT-OBJECT; ECUADOR; BRASIL.
Ano: 2002
URL: http://hdl.handle.net/10469/4912

Ecuador Debate [no. 86, agosto 2012. REVISTA COMPLETA]
Provedor de dados: 122
Autores: Centro Andino de Acción Popular (CAAP).
En las últimas décadas, las ciencias sociales se han visto desafiadas por discusiones que han puesto atención a teorizaciones y búsquedas epistemológicas en un ambiente de cuestionamiento a los límites disciplinarios. Es así que ha reaparecido la problemática del sujeto tratada muchas veces de modo superficial o confusamente en reemplazo de conceptos tales como actor social. El Tema Central de este número de la revista contiene algunos artículos dedicados a tratar el sujeto, con énfasis en las elaboraciones de la filosofía clásica y de las corrientes teóricas del psicoanálisis.
Tipo: Artículo
Palavras-chave: POLÍTICA; SOCIEDAD; ANTROPOLOGÍA; PSICOANÁLISIS; SUJETO; FILOSOFÍA CONTEMPORÁNEA; EMPLEO RURAL; POPULISMO; ASAMBLEA CONSTITUYENTE 1938; POLICY; SOCIETY; ANTHROPOLOGY; PSYCHOANALYSIS; SUBJECT; CONTEMPORARY PHILOSOPHY; RURAL EMPLOYMENT; POPULISM; CONSTITUENT ASSEMBLY 1938; ECUADOR.
Ano: 2012
URL: http://hdl.handle.net/10469/4516

La literatura y la metafísica del Sujeto (Tema Central)
Provedor de dados: 122
Autores: Albán, Fernando.
“Que es la literatura” de Jean-Paul Sartre es un texto que ofrece importantes reflexiones sobre el Sujeto. Sartre postula que la libertad de escribir implica la libertad del ciudadano. En tanto que la libertad está enraizada en la subjetivación del Sujeto, responde a una estructura intencional.  En la política del arte, el artista debe transmitir un saber y un poder hacer, que pasa por la supresión de la libertad de los signos, al espectador, quien debe hacer suyo ese poder al objetivar aquello que se encontraba premodelado en la vasta y libre subjetividad del autor.
Tipo: Artículo
Palavras-chave: SUJETO SOCIAL; LITERATURA; METAFÍSICA; LIBERTAD; SUBJETIVIDAD; CIUDADANO; SUBJECT SOCIAL; LITERATURE; METAPHYSICS; FREEDOM; SUBJECTIVITY; CITIZEN.
Ano: 2012
URL: http://hdl.handle.net/10469/4572

El sujeto y la muerte en la Filosofía Contemporánea (Tema Central)
Provedor de dados: 122
Autores: Gordillo, Ruth.
La cuestión de la muerte se ha presentado como parte de una categorización del hombre, y el sujeto surge como una construcción de la modernidad puesta en crisis por el mercado. De la noción de sujeto que la filosofía, el psicoanálisis y el marxismo habían enriquecido, queda muy poco. Lo que queda se nombra con una serie de términos técnicos que encierran al hombre en la soledad. Y está la muerte como elemento que alude a los límites, solo definibles en tanto diferentes, desde la experiencia de la subjetividad.
Tipo: Artículo
Palavras-chave: FILOSOFÍA CONTEMPORÁNEA; CONSUMO; SUBJETIVIDAD; MODERNIDAD; CONTEMPORARY PHILOSOPHY; CONSUMPTION; SUBJECTIVITY; MODERNITY; MUERTE; DEATH; INDIVIDUO; SUJETO SOCIAL; SUBJECT SOCIAL.
Ano: 2012
URL: http://hdl.handle.net/10469/4563

Psicoanálisis, filosofía y ciencias sociales (Debate)
Provedor de dados: 122
Autores: Tenorio Ambrossi, Rodrigo.
Este artículo pretende dar continuidad a los trabajos sobre Ciencias Sociales y psicoanálisis  publicados en el número 13 de ÍCONOS. Más que comentarlos busca introducirse en algunas de sus líneas de fuga para continuar con otras reflexiones que a veces van en el mismo sentido del original, otras en vía opuesta o, simplemente, transitan sus propios senderos.
Tipo: Artículo
Palavras-chave: PSICOANÁLISIS FILOSOFÍA CIENCIAS SOCIALES SUJETO SABER VERDAD PSYCHOANALYSIS PHILOSOPHY SOCIAL SCIENCES SUBJECT KNOWLEDGE TRUTH LACAN; JACQUES; 1901-1981.
Ano: 2002
URL: http://hdl.handle.net/10469/2139

Contingencias del concepto de sujeto en las humanidades y las disciplinas sociales (Tema Central)
Provedor de dados: 122
Autores: García Wong, Guillermo.
La noción de sujeto en las ciencias sociales tiene un origen en las reflexiones de la filosofía clásica y moderna. Las definiciones del sujeto en el psicoanálisis desafían a las elaboraciones de las ciencias sociales al proponer las dimensiones del inconsciente y el lenguaje como elementos constitutivos del individuo. no obstante, queda abierta una discusión sobre las relaciones del psicoanálisis y las ciencias sociales en la definición del sujeto.
Tipo: Artículo
Palavras-chave: CIENCIAS SOCIALES; FILOSOFÍA; EDUCACIÓN; SUJETO; DERECHO; SOCIOLOGÍA; SOCIAL SCIENCES; PHILOSOPHY; EDUCATION; SUBJECT SOCIAL; LAW; SOCIOLOGY.
Ano: 2012
URL: http://hdl.handle.net/10469/4574

El sujeto y la muerte en la Filosofía Contemporánea (Tema Central)
Provedor de dados: 122
Autores: Gordillo, Ruth.
La cuestión de la muerte se ha presentado como parte de una categorización del hombre, y el sujeto surge como una construcción de la modernidad puesta en crisis por el mercado. De la noción de sujeto que la filosofía, el psicoanálisis y el marxismo habían enriquecido, queda muy poco. Lo que queda se nombra con una serie de términos técnicos que encierran al hombre en la soledad. Y está la muerte como elemento que alude a los límites, solo definibles en tanto diferentes, desde la experiencia de la subjetividad.
Tipo: Artículo
Palavras-chave: FILOSOFÍA CONTEMPORÁNEA; CONSUMO; SUBJETIVIDAD; MODERNIDAD; CONTEMPORARY PHILOSOPHY; CONSUMPTION; SUBJECTIVITY; MODERNITY; MUERTE; DEATH; INDIVIDUO; SUJETO SOCIAL; SUBJECT SOCIAL.
Ano: 2012
URL: http://hdl.handle.net/10469/4563

Use of focus assessed transthoracic echocardiography (FATE) in the veterinary emergency room
Provedor de dados: 65
Autores: Lucina,Stephany Buba; Sarraff-Lopes,Ana Paula; Sousa,Marlos Gonçalves.
ABSTRACT: The use of bedside focus assessed transthoracic echocardiography (FATE) is widespread in human medicine, and the potential for veterinary medicine has only recently been investigated. Focused echocardiographic examination can be beneficial in critically ill patients compared to other bedside diagnostic methods, as well as facilitating rapid therapeutic approaches in the emergency room. The aim of this review is to discuss FATE and identify its main applications in veterinary medicine. In this context, FATE has proved to be benefical even when carried out by a non-cardiologist physician or veterinarian. However, a few references on this subject exist in the veterinary literature and there is still a need for standardization of this technique for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bedside; Cardiology; Cats; Critical care; Dogs.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001200603

Fate of allelochemicals in the soil
Provedor de dados: 65
Autores: Vidal,Ribas Antonio; Bauman,Thomas Trost.
Allelochemicals are compounds released by one plant or plant residues that may have a negative or positive effect on other plant. The importance of allelopathy was extensively explored during the past three decades, with the work concentrating in the extraction and identification of the chemicals, and demonstration of activity in petry dish experiments. These compounds interact in the soil environment similarly as herbicides and are subject to processes of degradation such as microbial degradation, oxidation, and photolysis, and processes of removal or transfer, such as volatilization and adsorption. The objective of this review was to access the fate of allelochemicals in the soil environment to help to find strategies to increase its activity. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adsorption; Allelopathy; Oxidation; Photolysis; Plant interference; Volatilization.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781997000200032

The brazilian pig industry can adopt european welfare standards: a critical analysis
Provedor de dados: 65
Autores: Dias,Cleandro Pazinato; Silva,Caio Abércio da; Manteca,Xavier.
Animal welfare is an issue of growing concern worldwide. Since the 1960s, Europe has led the discussions on this subject, developing the supporting science and the necessary standards. Currently, European welfare standards on pig farms set the global standards and may represent a potential marketing barrier for commercial pork production. Brazil is one of the largest producers and exporters of pork and has intensified efforts to adapt to the new standards. The objective of this paper is to assess the feasibility of applying European welfare standards to Brazilian industrial pig farming. The complexity of the required changes and the potential advantages to Brazil are discussed, and it is concluded that Brazil has the resources to meet the majority of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal production; Brazil; European standards; Pigs.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000601079

Sisvar: a Guide for its Bootstrap procedures in multiple comparisons
Provedor de dados: 64
Autores: Ferreira,Daniel Furtado.
Sisvar is a statistical analysis system with a large usage by the scientific community to produce statistical analyses and to produce scientific results and conclusions. The large use of the statistical procedures of Sisvar by the scientific community is due to it being accurate, precise, simple and robust. With many options of analysis, Sisvar has a not so largely used analysis that is the multiple comparison procedures using bootstrap approaches. This paper aims to review this subject and to show some advantages of using Sisvar to perform such analysis to compare treatments means. Tests like Dunnett, Tukey, Student-Newman-Keuls and Scott-Knott are performed alternatively by bootstrap methods and show greater power and better controls of experimentwise...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Monte Carlo; Type I error; Power.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200001

EXPERIÊNCIA PEDAGÓGICA NA CONSTRUÇÃO DE ITINERÁRIOS CULTURAIS REGIONAIS
Provedor de dados: 25
Autores: Cocco, Maria Dolores Alves; Vierno, Fernanda Moura; Perim, Marli Aparecida.
A experiência pedagógica baseada na Carta Internacional dos Itinerários Culturais, CIIC (ICOMOS, 2008) teve como objetivo principal identificar e conectar acontecimentos históricos a forma de ocupação do homem sobre o território do vale do Paraíba(SP).
Tipo: Article
Palavras-chave: Região metropolitana; Vale do Paraíba.
Ano: 2014
URL: http://hdl.handle.net/2315/275

Generation of sub-surface anticyclones at Arctic surface fronts due to a surface stress
Provedor de dados: 5
Autores: Brannigan, Liam; Johnson, Helen; Lique, Camille; Nycander, Jonas; Nilsson, Johan.
Isolated anticyclones are frequently observed below the mixed layer in the Arctic Ocean. Some of these sub-surface anticyclones are thought to originate at surface fronts. However, previous idealized simulations with no surface stress show that only cyclone-anticyclone dipoles can propagate away from baroclinically unstable surface fronts. Numerical simulations of fronts subject to a surface stress presented here show that a surface stress in the same direction as the geostrophic flow inhibits dipole propagation away from the front. On the other hand, a surface stress in the opposite direction to the geostrophic flow helps dipoles to propagate away from the front. Regardless of the surface stress at the point of dipole formation, these dipoles can be...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00396/50763/51476.pdf

Growth and demise of Cenozoic isolated carbonate platforms: New insights from the Mozambique Channel seamounts (SW Indian Ocean)
Provedor de dados: 5
Autores: Courgeon, Simon; Jorry, Stephan; Camoin, G. F.; Boudagher-fadel, M. K.; Jouet, Gwenael; Revillon, Sidonie; Bachelery, P.; Pelleter, Ewan; Borgomano, J.; Poli, E.; Droxler, A. W.
Although long-term evolutions of isolated shallow-water carbonate platforms and demise episodes leading to guyot formation have been the subject of numerous studies during the last decades, their driving processes are still the subject of active debates. The Mozambique Channel (SW Indian Ocean) is characterized by several flat-topped seamounts ranging from 11°S to 21°S in latitudes. Based on a comprehensive geomorphologic study and on dredged samples analysis, we show that these features correspond to tropical isolated shallow-water carbonate platforms. Coupling strontium isotopy and foraminifera biostratigraphy, well-constrained chronostratigraphy results indicate that shallow-water carbonate production started in the Mozambique Channel during distinct...
Tipo: Text
Palavras-chave: Carbonate platform; Drowning; Cenozoic; Mozambique Channel; East African rift system.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00347/45827/46634.pdf

Innate Immune Responses of a Scleractinian Coral to Vibriosis
Provedor de dados: 5
Autores: Vidal-dupiol, Jeremie; Ladriere, Ophelie; Destoumieux-garzon, Delphine; Sautiere, Pierre-eric; Meistertzheim, Anne-leila; Tambutte, Eric; Tambutte, Sylvie; Duval, David; Foure, Laurent; Adjeroud, Mehdi; Mitta, Guillaume.
Scleractinian corals are the most basal eumetazoan taxon and provide the biological and physical framework for coral reefs, which are among the most diverse of all ecosystems. Over the past three decades and coincident with climate change, these phototrophic symbiotic organisms have been subject to increasingly frequent and severe diseases, which are now geographically widespread and a major threat to these ecosystems. Although coral immunity has been the subject of increasing study, the available information remains fragmentary, especially with respect to coral antimicrobial responses. In this study, we characterized damicornin from Pocillopora damicornis, the first scleractinian antimicrobial peptide (AMP) to be reported. We found that its precursor has...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00039/14996/12433.pdf

Inverse identification of the bending stiffness of a braided polyethylene twine subject to large deformation: application to the identification of the mesh opening rigidity of fishing nets.
Provedor de dados: 5
Autores: Morvan, Barthelemy; Bles, G; Dumergue, Nicolas; Priour, Daniel.
The evaluation of the mesh opening stiffness of fishing nets is an important issue in assessing the selectivity of trawls. It appeared that a larger bending rigidity of twines decreases the mesh opening and could reduce the escapement of fish. Nevertheless, netting structure is complex. A netting is made up of braided twines made of polyethylene or polyamide. These twines are tied with non-symmetrical knots. Thus, these assemblies develop contact-friction interactions. Moreover, the netting can be subject to large deformation. In this study, we investigate the responses of netting samples to different types of solicitations. Samples are loaded and unloaded with creep and relaxation stages, with different boundary conditions. Then, two models have been...
Tipo: Text
Palavras-chave: Numerical model; Experiments; Braided twine; Mesh opening rigidity; Large deformation.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00348/45899/45581.pdf

Price of the scallop Pecten maximus at Saint Brieuc (Brittany - France) from 1960 to 1984 : econometric study
Provedor de dados: 5
Autores: Meuriot, Eric.
The changes during the 70s in the scallop (Pecten maximus) market have been the subject of detailed studies (ESCAE of Brest, 1976; L'HOSTIS, 1980). More recent data on household consumption and distribution channels are also available in the SECODIP panels or the survey carried out in 1985 by MOTIVACTION on "Les consommateurs et les produits de la mer" (Consumers and Seafood). The subject of this study on the average annual price formulation of the scallop in St-Brieuc Bay is to provide a qualitative supplement to the studies already done. It distinguishes the main factors explaining the prices changes at landing over a long period. The quantitative results are meant to establish a bio-economic model that analyzes various strategies of long-term...
Tipo: Text
Palavras-chave: SEM.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-2471.pdf

Analyzing the market position of fish species subject to the impact of long-term changes: a case study of French fisheries in the Bay of Biscay
Provedor de dados: 5
Autores: Le Floc' H, P; Poulard, Jean-charles; Thebaud, Olivier; Blanchard, Fabian; Bihel, J; Steinmetz, Fabien.
Market position and its evolution were analysed in nine key fish and cephalopod species subject to long-term changes, using the Bay of Biscay fisheries as a case study. Although such long term changes have already been documented, and in some cases shown to be related to the impacts of fishing, changes in the physical environment, or both, relatively little work has been devoted to their potential consequences in economic terms. The nature and extent of these consequences was determined in the present study by looking at the composition of the affected fish production, and the status of different fish products on the markets. We propose a methodology to characterize market position for this set of nine species. The selected species represent a significant...
Tipo: Text
Palavras-chave: Atlantic Ocean; Fish market; Macro economic aggregates; Environmental change.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4716.pdf

Influence of morphological changes on suspended sediment dynamics in a macrotidal estuary: diachronic analysis in the Seine Estuary (France) from 1960 to 2010
Provedor de dados: 5
Autores: Grasso, Florent; Le Hir, Pierre.
Estuaries are subject to extensive morphological changes through human activities, such as deepening and narrowing via dredging and channelization. The estuary sediment load, characterised by the estuarine turbidity maximum (ETM), can severely increase in response to channel deepening, shifting the estuary from a natural to hyperturbid state. The main processes driving the estuarine circulation, hydrology and sediment dynamics are relatively well known. However, their relative influence on suspended sediment concentration (SSC), as well as their role in the transition toward hyperturbid estuaries, is still a subject of debate. Therefore, this study aims at investigating the relative contribution of key estuarine drivers (gravitational circulation and tidal...
Tipo: Text
Palavras-chave: Estuary deepening and narrowing; Sediment dynamics; Turbidity maximum; Tidal asymmetry; Stratification; Numerical modelling; Morphological changes.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00479/59046/65965.pdf

Do changes in environmental and fishing pressures impact marine communities? An empirical assessment
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Trenkel, Verena; Carpentier, Andre; Coppin, Franck; Gil De Sola, Luis; Leaute, Jean-pierre; Mahe, Jean-claude; Maiorano, Porzia; Mannini, Alessandro; Murenu, Matteo; Piet, Gerjan; Politou, Chrissi-yianna; Reale, Bruno; Spedicato, Maria-teresa; Tserpes, George; Bertrand, Jacques.
P&gt;1. The development of ecosystem approaches to environmental management implies the need to account for multiple pressures on ecosystems. Trends in multiple metrics that respond differently to changes in major environmental pressures need to be combined to evaluate the impacts of fishing and environmental changes on fish communities. 2. An exploited fish community is viewed as a three-level food chain in which the two upper levels, or functional groups, are targeted by fishing fleets, while the lowest level is subject to environmental variation. Qualitative modelling is used to predict changes at the two upper levels, that is, top-down vs. bottom-up perturbations. Abundance and length metrics are calculated from survey data for 14 Mediterranean and...
Tipo: Text
Palavras-chave: Bottom-up control; Community metrics; Compensation; Ecosystem approach to fisheries; Ecosystem assessment; Functional groups; Groundfish community; Mediterranean; North Atlantic; Top-down control.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11925/8637.pdf

Ballast water: a review of the impact on the world public health
Provedor de dados: 80
Autores: Takahashi,CK; Lourenço,NGGS; Lopes,TF; Rall,VLM; Lopes,CAM.
Since the nineteenth century ships have been using ballast water (BW) for safety, stability, propulsion and maneuverability, as well as to redress loss of fuel weight and water consumption, and to maintain structural stress at acceptable levels. Ballast water has been spreading many non-native species around the globe, but little is known about the extent and potential significance of ship-mediated transfer of microorganisms. The global movements of ballast water by ships create a long-distance dispersal mechanism for human pathogens that may be important in the worldwide distribution of microorganisms, as well as for the epidemiology of waterborne diseases. Only a few studies have been carried out on this subject, most of them involving ballast water...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Public health; Ballast water; Vibrio cholerae.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000300002

枝肉横断面撮影装置の開発と得られた画像を利用したBMSナンバーの推定
Provedor de dados: 19
Autores: 口田, 圭吾; 鈴木, 三義; 三好, 俊三; KUCHIDA, Keigo; SUZUKI, Mitsuyoshi; MIYOSHI, Shunzo.
デジタルカメラと照明装置とを一体化することで，鮮明な画像が採取可 能な撮影装置を開発し，得られた画像を利用して，牛脂肪交雑基準（BMS）ナンバー を推定することを目的とした．撮影装置は，ドーム部，同牛脂肪交雑基準（BMS）ナ ンバー軸落射部およびデジタルカメラ部により構成されており，ドーム部の底面に は，上方向に向かって570個の白色発光ダイオード（白色LED）がリング状に配置さ れている．また，同軸落射部には，透過率50%のハーフミラーが，被写体に対して45 度の角度で設置されており，横から照射される324個の白色LEDからの光を，被写体 に反射させる働きを持つ．ドーム部底面と枝肉横断面が接触するため，鉛直方向か つ一定距離からの撮影を可能としている．黒毛和種肥育牛271頭について，開発した 装置を用い撮影を行った．ロース芯表面で乱反射を起こした画像はなく，本装置を 使用することで，安定的に鮮明な画像を採取できることが明らかとなった．格付員 によるBMSナンバーを従属変数，画像解析形質および客観的に測定可能な枝肉形質（ 計148変数）を説明変数候補とし，逐次変数増減法による重回帰分析からBMSナンバ ーを推定した．説明変数候補から選択された6変数を利用した重回帰式を用いて，BMS ナンバーの推定を行ったところ，推定したBMSナンバーと格付員によるBMSナンバー との差が，±0である割合は，62.0%，±1以内である割合は97.0%となった． The first aim of this study was to develop photographing equipment，which is able to take a clear image of the cross section of carcass...
Palavras-chave: Image analysis; BMS number; Photographing equipment; Japanese black.
Ano: 2001
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/954

The Global Directory of Marine and Freshwater Professionals: OceanExpert
Provedor de dados: 20
Autores: Vladymyrov, Vladimir.
OceanExpert started as the Global Directory of Marine (and Freshwater) Professionals (GLODIR) in 1997 after the IODE Group of Experts on Marine Information Management (GE-MIM) had noted that the International Directory of Marine Scientists project, developed and maintained in the 1970s and 1980s by several UN agencies had been stopped despite its high appreciation by the ocean research community. The first version of the new GLODIR was launched in 1997 as a web product enabling experts to enter and edit their information. Whereas the first version used the full ASFA subject descriptor set to enable experts to define their expertise, this was quickly dropped as experts showed little enthusiasm to spend the time required to pick descriptors from this...
Tipo: Conference Material
Palavras-chave: Maarine and freshwater professionals.
Ano: 2005
URL: http://hdl.handle.net/1834/2700

The Global Directory of Marine and Freshwater Professionals: OceanExpert
Provedor de dados: 20
Autores: Pissierssens, P.
OceanExpert started as the Global Directory of Marine (and Freshwater) Professionals (GLODIR) in 1997 after the IODE Group of Experts on Marine Information Management (GE-MIM) had noted that the International Directory of Marine Scientists project, developed and maintained in the 1970s and 1980s by several UN agencies had been stopped despite its high appreciation by the ocean research community. The first version of the new GLODIR was launched in 1997 as a web product enabling experts to enter and edit their information. Whereas the first version used the full ASFA subject descriptor set to enable experts to define their expertise, this was quickly dropped as experts showed little enthusiasm to spend the time required to pick descriptors from this...
Tipo: Report
Palavras-chave: Marine scientists; Freshwater scientists; Information services.
Ano: 2002
URL: http://hdl.handle.net/1834/1830

GMOs: the wisdom of crowds &amp; the folly of deregulation
Provedor de dados: 21
Autores: Paull, John.
Australia’s Office of the Gene Technology Regulator (OGTR) is pushing to change the definition of genetically modified organisms (GMOs). The proposed changes would remove from regulation some GMOs that are presently subject to regulation by the OGTR. At present GMOs are subject to risk analysis, to safety evaluations, and to GM labelling if used in food. The proposed regulations, if they are not disallowed by the Australian Parliament, will water down the definition of GMOs in Australia, will have Australia applying definitions of GMOs that are different from major trading partners, and they risk damaging the clean and green export reputation of Australia's food and agriculture sectors. The GM proposed deregulation would be bad science and bad...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general Farming Systems Values; Standards and certification Food systems Environmental aspects Knowledge management.
Ano: 2019
URL: http://orgprints.org/36323/1/Paull2019.GMO.Parliament.r.pdf

Preferential Tariffs, WTO and Developing Countries: Do the Gains from Multilateral Market Access Outweigh Preferential Access?
Provedor de dados: 31
Autores: Elbehri,   Aziz; Wainio,   John.
WTO trade negotiations on market access follow the MFN treatment. However, an increasing share of trade falls under preferential regimes. For agriculture, trade liberalization analyses have showed that the impact on developing countries (DC) is not uniform, partly from omitting preferences. In this paper, we examine whether preference-recipient DC benefit more from across the board tariff cuts than from preferences. We employ a global CGE model with detailed preference-inclusive tariff database to examine the differential impact of trade liberalization on DC subject to preferences versus MFN-based market access. We focus on the European Union- the world largest preferences provider- and run two experiments of tariff cuts by the EU: a 50% across-the-board...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural trade preferences; MFN tariffs; Trade liberalization; Developing countries; Preferential trade Agreements; International Relations/Trade; D5; F13.
Ano: 2006
URL: http://purl.umn.edu/25644

WETLANDS, WILDLIFE, AND WATER QUALITY: TARGETING AND TRADE OFFS
Provedor de dados: 31
Autores: Newbold,   Stephen C.; Weinberg,   Marca.
Cost-effective targeting of conservation activities has only recently been addressed by economists.  Most work to date has focused on finding the best locations to set aside land for the protection of biodiversity.  An economic approach to the problem, where biodiversity reserve networks are delineated to maximize the number of species protected subject to a budget constraint, has been shown to be much more cost-effective than the standard approach, where reserve networks are delineated subject to an area constraint, ignoring differences in costs across sites.  This paper is among the first to use spatially explicit models of production functions for ecosystem services in an optimization framework for prioritizing sites for wetlands restoration.  Tradeoffs...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/22013

Reflexiones del Metodo de Investigacion, Consultoria e Innovacion en Sistemas de Gestion de Empresas Agropecuarias
Provedor de dados: 31
Autores: Ruiz Guzman,   Jose Luis; Aguilar Valdes,   Alfredo; Gomez Gonzalez,   Gerardo; Ruiz Ledezma,   Javier.
The evolution of the subject of Research on Technology Transfer and Agroindustrial Development at the Facultad de Estudios Superiores Cuautitlán UNAM (School of Advanced Studies at Cuatitlan UNAM) converges with the generation of agricultural business management systems and with the consultancy service and training, as a University-Company articulation strategy; with the purpose of awakening business people's interests in order to discover productivity and competitiveness helping them to become better, transform or revolution its organization in the fight to get present opportunities in the market and the economic surroundings. Above all, the strengthening of the subject is upheld by the evolution of the research method applied to innovation through the...
Tipo: Journal Article
Palavras-chave: Research; Innovation; Consultancy; Method; Company; Agrindustrial.; Agribusiness.
Ano: 2009
URL: http://purl.umn.edu/48610

The Implications of Marketing-Order Quality Regulations in a Free-Trade Environment
Provedor de dados: 31
Autores: Saitone,   Tina L.; Sexton,   Richard J.
Among other functions, federal marketing orders allow producers to impose quality regulations and inspections, and, under the section 8e provision, require imports to be subject to the same quality standards and regulations as the domestic industry. As efforts to liberalize trade continue apace, the degree to which a minimum quality standard (MQS) can be used in conjunction with section 8e as a nontariff trade barrier becomes a subject of increasing importance. The high incidence of utilization of the section 8e provision, coupled with a relatively high degree of variability of standards over time, serves to motivate this research on how MQS imposed through marketing orders can affect producer profits, consumer welfare and influence trade patterns....
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/9740

Academic of environmental sciences: perception and interest in agro-ecological sector
Provedor de dados: 22
Autores: Oliveira, Carmem Sara Pinheiro de; Lima, Allison Ferreira de.
Agroecology is settling as a new alternative for transformation, not just in the productive point of view, but mostly about human inclusion. In this context, comes the debate about the importance of family farming as a means of sustainable production. This research aimed to evaluate the design of university students of Environmental Sciences on family agriculture and its agro-ecological perspectives. The subjects were 104 students, distributed among the courses of Biological Sciences and Ecology Universidade Federal do Rio Grande do Norte (UFRN), in which they were chosen at random and asked to answer a standard questionnaire with key questions on the proposed theme. The results show that there is some knowledge about the theme addressed, however so there...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Family agriculture  agroecology; Knowledge; Students; Sustainable.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14121

Samuel Goodenough, Berners Street, [London], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Goodenough, Samuel.
Discussion of Catholic Emancipation: Smith has great "liberality" on the subject but believes he is not fully informed and that the Dissenters are "very much deceived" if they think the Catholics will allow them to participate with them in power. Goodenough believes Catholics cannot act for themselves in anything concering religion, which is what would make them dangerous if they had power. Regrets that Oxford University have begun meddling in politics by proposing Lord Grenville [William Wyndham Grenville, 1st Baron Grenville (1759-1834), prime minister, 1806-1807] for Chancellor after he had avowed himself "the Champion of Catholic Emancipation". Goodenough hates the subject, particularly as his two sons in Christ Church have "most wantonly &amp;...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62627/1/JES-COR-11-83_001.tif

Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith, 12 Great Marlborough Street, London
Provedor de dados: 24
Autores: Woodward, Thomas Jenkinson.
Relieved that his intended trip to London has been cancelled. Glad his 'Lycoperdon' paper was well received at the Linnean Society; notes on composition and conditions of publication. Impatient to see "Linnean Transactions" vol 1. Pleased with Smith's "Spicilegium botanicum"; hopes the text will soon follow. Observes that "Spicilegium" and "English botany", by sharing same subject of mistaken or ill-figured scarce English plants, interfere with each other; favours "Spicilegium" but hopes "English botany" will not stop. Hopes that reports of [William] Curtis being almost bankrupt and forced to give up his Brompton garden are untrue. Appreciates Smith's reasons for not engraving 'Lycoperdon coliforme' but maintains that whilst [James] Dickson's figure is...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63436/1/JES-COR-18-49_001.tif

Acute exercise and caffeine improve insulin-induced hypoglycemia in normal and malnourished rats
Provedor de dados: 3
Autores: Babata, Lucas Kazunori Rubira; Malta, Ananda; Godoi, Vilma Aparecida Ferreira de; Pedrosa, Maria Montserrat Diaz.
In food restriction, hypoglycemic episodes can be more severe and persistent. This study assessed the influence of acute exercise and caffeine on the insulin-induced hypoglycemia in freely-fed or malnourished (50% food restriction) young rats. At the age of 60 days, rats under overnight fasting received an insulin injection to cause an episode of hypoglycemia. In some animals, hypoglycemia was preceded by an acute session of exercise, in others, caffeine was orally given 15 minutes after insulin injection; or exercise and caffeine were combined. Blood samples were collected at regular intervals for five hours after insulin injection. A beneficial effect of both exercise or caffeine on the hypoglycemic episode in the malnourished rats was found. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food restriction; Glycemia; Methylxanthine; Physical activity fisiologia endócrina.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22776

Profile of publications about functional foods in Brazilian journals: a scientometric analysis from 2000 to 2015 and an overview of Brazilian legislation
Provedor de dados: 3
Autores: Silva, Carlos Eduardo De Farias; Andrade, Nayana Pereira; Cerqueira, Raphaella Barbosa de Oliveira; Silva, Izabelle Caroline Caetano da; Cavalcante, Paula Acioly Wanderley; Abud, Ana Karla de Souza; Souza, José Edmundo Accioly de.
 Functional foods have been highlighted by having, in addition to nutritional characteristics, the possibility of preventing risk and/or delaying the development of several non-communicable diseases (NCDs). In the last decade, many articles related to functional food have been published worldwide, and there is a need to understand how the theme is reflected in national journals. The present research aimed to collect information about publications covering the topic of functional foods in journals, synthesizing these data and interpreting them, evaluating the profile of the authors and a frequency of the articles involved with the subject by scientific journal and by State/region. Subsequently, they were evaluated as the most studied foods and as more used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioquimica - Metabolismo e Bioenergetica information gathering; Functional property request; Brazilian publications; Anvisa. Functional Food.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34672

Physiological evaluation of manual operated weeders and sprayers on farm use
Provedor de dados: 111
Autores: ARUDRA, ASHOK KUMAR.
Ergonomics is the scientific study of relationship between man and his working environment, which includes ambient conditions, tools and materials, methods of work and organization of work. Two sprayers and weeders namely, knapsack sprayer, foot operated sprayer, wheel hoe and power weeder were evaluated with respect to overall tiredness and body part discomfort experience by the subjects while spraying and weeding in field.Nine agricultural workers who were free from cardiac and other ailments were selected for operating weeders and sprayers. A polar heart rate monitor was used to measure physiological response of the operators during field operation. During the experiments, the external parameters of ambient temperature and relative humidity and light...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ergonomics; Polar heart rate monitor; Thermal hygrometer; Dry land welders; Sprayers.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3372

Relationship of Pears’ Dielectric Properties and Rates of Pears’ Bruise
Provedor de dados: 111
Autores: Azadbakht, Mohsen; Mahmoodi, Mohammad Javad; Vahedi Torshizi, Mohammad; Asghartabar Kashi, Peyman.
Nowadays, dielectric materials, as one of the nondestructive methods, have drawn the researchers’ attention to their diverse array of advantages to the other methods. Before loading and storage, 120 pears were examined under CT-Scan and 81 pears with zero bruise were selected followed by subjecting them to quasi-static and dynamic loading and a 10 day storage period was chosen to investigate the bruise levels and their relationships with dielectric constant. At the end of the storage period, the fruits were measured in their dielectric constant after their bruise levels were determined in CT-Scans. The measurements were undertaken in capacitor plate distances of 8, 11 and 14 cm for input voltages of 6, 10 and 14 V and input voltage frequencies of 20, 60...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dielectric; Pears; Bruise; CT-Scan; Load; Moisture; Voltage.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5480

Biogeography and conservation of the herpetofauna of the Upland Pine-Oak Forests of Honduras
Provedor de dados: 49
Autores: Wilson,Larry David; Townsend,Josiah Harold.
The upland pine-oak forest herpetofauna constitutes the smallest segment distributed in the major habitat types in Honduras, due to its occurrence at moderate elevations in relatively inhospitable environments, compared to more mesic habitats in the country. This segment, however, is subject to considerable environmental threat as a consequence of annual burning and logging. Of the 356 herpetofaunal species known from Honduras, 105 are known from these habitats. These forests occur throughout much of the mountainous interior of Honduras. They are subject to the Intermediate Dry climate. Four salamanders, 27 anurans, four turtles, 29 lizards, and 41 snakes comprise the herpetofauna. These species are partitioned into restricted, widespread, and peripheral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibians and reptiles; Distributional patterns; Biodiversity significance; Conservation status.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100018

Targeting and translocation of endothelial nitric oxide synthase
Provedor de dados: 56
Autores: Michel,T.
This review explores advances in our understanding of the intracellular regulation of the endothelial isoform of nitric oxide synthase (eNOS) in the context of its dynamically regulated subcellular targeting. Nitric oxide (NO) is a labile molecule, and may play important biological roles both within the cell in which it is synthesized and in its interactions with nearby cells and molecules. The localization of eNOS within the cell importantly influences the biological role and chemical fate of the NO produced by the enzyme. eNOS, a Ca2+/calmodulin-dependent enzyme, is subject to a complex pattern of intracellular regulation, including co- and post-translational modifications and interactions with other proteins and ligands. In endothelial cells and cardiac...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caveolin; Signal transduction; Nitric oxide synthase; Calmodulin; Estrogen; Bradykinin.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001100006

Los Consejos Comunales: ¿Avance o retroceso para la democracia venezolana? (Dossier)
Provedor de dados: 122
Autores: Goldfrank, Benjamin.
El presente artículo aborda el debate en torno a los consejos comunales de Venezuela, un mecanismo de participación ciudadana promovido por el gobierno de Hugo Chávez con especial fuerza a partir de 2005. Luego de exponer brevemente su historia y principales características institucionales, describe la producción académica en torno al tema, identificando dos perspectivas contrapuestas: una que reivindica sus potencialidades democratizadoras, y otra que por el contrario, entiende a los consejos comunales como mecanismos al servicio de viejas lógicas clientelares y como amenaza a las instituciones de la democracia representativa. Basado en una comparación entre los consejos comunales y otras experiencias de democracia participativa en América latina y...
Tipo: Artículo
Palavras-chave: CONSEJOS COMUNALES; DEMOCRACIA PARTICIPATIVA; DEMOCRACIA REPRESENTATIVA; DISEÑO INSTITUCIONAL; VENEZUELA; COMMUNITY COUNCILS; PARTICIPATORY DEMOCRACY; REPRESENTATIVE DEMOCRACY; INSTITUTIONAL DESIGN.
Ano: 2011
URL: http://hdl.handle.net/10469/3028

El derecho ambiental en la integraci??n regional de Suram??rica (Dossier)
Provedor de dados: 122
Autores: Gonz??lez Celis, Gisele Lorena.
El derecho ambiental tiene dos caracter??sticas principales: la regulaci??n y control de las actividades de extracci??n de materia prima y la conservaci??n de ecosistemas end??micos y de cuidado especial. La armonizaci??n de los derechos ambientales nacionales se convierte en una tarea urgente en el marco de los procesos de integraci??n regional que experimenta Suram??rica, ya que los ecosistemas existentes en el territorio son de gran importancia y son vulnerables de acuerdo con el tipo de desarrollo que se plantee.  Actualmente, el derecho ambiental es un tema que no se ha discutido lo necesario entre los pa??ses; sin embargo, en las cumbres internacionales se ha establecido como un punto importante de la preocupaci??n mundial. Por ello es fundamental...
Tipo: Art??culo
Palavras-chave: DERECHO AMBIENTAL; INTEGRACI??N REGIONAL; DESARROLLO SOSTENIBLE; UNI??N DE NACIONES SURAMERICANAS (UNASUR); INICIATIVA DE INTEGRACI??N REGIONAL SURAMERICANA (IIRSA); AM??RICA DEL SUR; ENVIRONMENTAL LAW; REGIONAL INTEGRATION; SUSTAINABLE DEVELOPMENT; SOUTH AMERICA.
Ano: 2012
URL: http://hdl.handle.net/10469/5110

Expression of ZmLEA3, AOX2 and ZmPP2C genes in maize lines associated with tolerance to water deficit
Provedor de dados: 64
Autores: Marques,Thaís Lima; Von Pinho,Renzo Garcia; Von Pinho,Édila Vilela de Resende; Santos,Heloisa Oliveira dos.
ABSTRACT Knowing genes related to water deficit is a valuable tool to assist and accelerate the selection process of maize genotypes more adapted to drought conditions. Therefore, this work aimed to evaluate genes expression related to tolerance to water deficit in maize lines, using proteomic and transcriptomic analyses. Two lines previously classified as tolerant (91-T) and non-tolerant (57-NT) to low water availability were used. Dried seeds, ears tips, and seedlings (collected at three, five, and seven days after sowing) of the two maize lines (91-T and 57-NT) were used in proteomic analyses. Seedlings were subject to two contrasting water-availability conditions (70% and 10% of the water retention capacity). The expression of catalase, peroxidase, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Electrophoresis; QRT-PCR.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100233

Global Development of Organic Agriculture: Challenges and Prospects
Provedor de dados: 21
Preface:  Modern agriculture and food systems, including organic agriculture, are undergoing a technological and structural modernization and are faced with a growing globalization. Organic agriculture (OA) can be seen as pionering efforts to create sustainable development based on other principles than mainstream agriculture. There are however large differences between the challenges connected to, on the one hand, modern farming and consumption in high-income countries and, on the other hand, smallholder farmers and resource-poor consumers in low-income countries.    The point of departure is the increasing globalization and the production and trade of food and fodder and how this influences the role of OA. The main aim of this book is to provide an...
Tipo: Book
Palavras-chave: "Organics" in general; Food systems.
Ano: 2006
URL: http://orgprints.org/10345/1/Halberg_Alroe_Knudsen_Kristensen-2006-Global_development_of_organic_agriculture-Contents.pdf

Study on Input/Output Accounting Systems on EU agricultural holdings
Provedor de dados: 21
Autores: Goodlass, G.; Halberg, N.; Verschuur, G.W.; Hanegraff, M.C.
Of 241 questionnaires sent out to 20 countries 55 completed forms were returned. No  information could be obtained about systems in Portugal or the USA. The subject of  nutrients was covered by 91% of systems, pesticides 38%, energy 29% and other subjects  including wastes 44%. Nearly half of the systems covered more than one subject, the most common single subject system was nutrients. The arable sector was covered most often by the systems (76%), with dairy (62%) and pig (56%) the most prominent of the livestock sectors. The respondents judged that 65% of systems were at least moderately effective in improving the ratio of inputs to outputs. The highest levels of ratio reduction tended to occur with systems which included the livestock sectors or...
Tipo: Report
Palavras-chave: Environmental aspects Education; Extension and communication Farm nutrient management.
Ano: 2001
URL: http://orgprints.org/13117/1/13117.pdf

A produção mineral pode ser sustentável? Uma análise epistemológica da questão
Provedor de dados: 25
Autores: Lima, Flavio Jorge; Fortes Neto, Paulo; Batista, Getulio Teixeira.
A bibliografia estudada para discutir a sustentabilidade da produção mineral aponta para duas correntes que debatem o assunto, caracterizadas de acordo com o ponto central das teses: a dos recursos fixos e custos oportunidades. A primeira encara os recursos explorados pela mineração como não renováveis e passíveis de exaustão. A segunda indica que novas tecnologias suprirão as demandas futuras à medida que os recursos poderão ser extraídos de fontes com menor concentração de minérios. Ambas pressupõem que o Estado poderia interferir incisivamente na questão da internalização dos custos da produção e da recuperação dos impactos ambientais. Legalmente, o Estado instituiu o principio “poluidor-pagador”, que parece não atender efetivamente a demanda degradante...
Tipo: Article
Palavras-chave: Sustentabilidade; Epistemologia e mineração.
Ano: 2011
URL: http://hdl.handle.net/2315/175

Análisis de la situación de seguridad, soberanía alimentaria y nutricional de la Cooperativa Flor de Pancasan 8 de Marzo, durante el periodo 2006-2009.
Provedor de dados: 32
Autores: Rodriguez Flores, Edwin Francisco.
El objetivo de esta investigación fue evaluar el impacto de los procesos de intervención de entidades de desarrollo  las actividades productivas en la seguridad y soberanía alimentaria y nutricional propias de los socios (as) de la cooperativa Flor de Pancasan 8 de Marzo durante el periodo 2006 – 2009. El tema se aborda en dos momentos a saber, primero el impacto que han tenido los procesos de intervención de las entidades de desarrollo que tuvieron presencia en la zona de Pancasan, y en un segundo momento, las actividades productivas desarrolladas por los socios (as) de la cooperativa en el tema. El tipo de muestreo utilizado fue el Aleatorio Simple Estratificado, obteniendo una muestra estadística de 89 entrevistas aplicándolas a 14 de las 18 comunidades...
Palavras-chave: Seguridad alimentaria; Cooperativa; Disponibilidad; Acceso; Consumo; Food security; Cooperative; Availability; Access; Consumption; EDAR; Desarrollo Rural Territorial Sustentable CP-UNAN; Maestría Tecnológica.
Ano: 2010
URL: http://hdl.handle.net/10521/365

Evaluación del impacto del programa oportunidades en las localidades de La Laja, Plancarte y Maravatío del Encinal en el estado de Guanajuato.
Provedor de dados: 32
Autores: Martínez Barajas, María Blanca.
El objetivo de esta investigación es determinar cuáles han sido los avances del Programa en función de los objetivos establecidos inicialmente. La investigación  combina  métodos cualitativos y cuantitativos aplicando encuestas y entrevistas a los beneficiarios del Programa; se realizó en 2013 en las localidades de La Laja y Plancarte en el municipio de Celaya y Maravatio del Encinal en el municipio de Salvatierra, ambos pertenecientes al  estado de Guanajuato.  La mayor parte de los beneficiarios se encuentran por debajo de la línea de Bienestar Mínimo (LBM) que es el criterio principal de selección establecido por el programa. Se presentan avances en educación  pues la mayor parte de los beneficiarios en edad escolar (86.78%) asisten a ella como...
Palavras-chave: Oportunidades; Pobreza; Transferencia; Avances; Objetivos; Poverty; Transfers; Progress; Goals; Economía; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2283

How to successfully publish interdisciplinary research: learning from an Ecology and Society Special Feature
Provedor de dados: 7
Autores: Pohl, Christian; Transdisciplinarity Lab USYS TdLab, Department of Environmental Systems Science, ETH Zurich; Network for Transdisciplinary Research td-net, Swiss Academies of Arts and Sciences; christian.pohl@env.ethz.ch; Wuelser, Gabriela; Network for Transdisciplinary Research td-net, Swiss Academies of Arts and Sciences; gabriela.wuelser@scnat.ch; Bebi, Peter; WSL-Institute for Snow and Avalanche Research SLF; bebi@slf.ch; Bugmann, Harald; Forest Ecology, Department of Environmental Systems Science, ETH Zurich; harald.bugmann@env.ethz.ch; Hirschi, Christian; Environmental Policy and Economics, Department of Environmental Systems Science, ETH Zurich; christian.hirschi@env.ethz.ch; Le, Quang Bao; Department of Environmental Systems Science, ETH Zurich; CGIAR Program in Dryland Systems; q.le@cgiar.org; Rigling, Andreas; Swiss Federal Institute for Forest, Snow and Landscape Research WSL; andreas.rigling@wsl.ch; Seidl, Roman; Department of Environmental Systems Science, ETH Zurich; roman.seidl@env.ethz.ch; Huber, Robert; Swiss Federal Institute for Forest, Snow and Landscape Research WSL; robert.huber@wsl.ch.
What are the factors that hinder or support publishing interdisciplinary research? What does a successful interdisciplinary publishing process look like? We address these questions by analyzing the publishing process of the interdisciplinary research project titled &amp;#8220;Mountland.&amp;#8221; Project researchers published most of their main results as a Special Feature of Ecology and Society. Using the story wall method and qualitative content analysis, we identified ten factors contributing to the success or failure of publishing interdisciplinary research. They can be assigned to four groups of resources: scientific resources, i.e., previous joint research, simultaneously written manuscripts; human resources, i.e., coordination, flexibility,...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Hindering and supporting factors; Interdisciplinary publishing; Mountland.
Ano: 2015

The transformed-stationary approach: a generic and simplified methodology for non-stationary extreme value analysis
Provedor de dados: 5
Autores: Mentaschi, Lorenzo; Vousdoukas, Michalis; Voukouvalas, Evangelos; Sartini, Ludovica; Feyen, Luc; Besio, Giovanni; Alfieri, Lorenzo.
Statistical approaches to study extreme events require, by definition, long time series of data. In many scientific disciplines, these series are often subject to variations at different temporal scales that affect the frequency and intensity of their extremes. Therefore, the assumption of stationarity is violated and alternative methods to conventional stationary extreme value analysis (EVA) must be adopted. Using the example of environmental variables subject to climate change, in this study we introduce the transformed-stationary (TS) methodology for non-stationary EVA. This approach consists of (i) transforming a non-stationary time series into a stationary one, to which the stationary EVA theory can be applied, and (ii) reverse transforming the result...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00354/46490/46266.pdf

Analyse de la valeur patrimoniale d'espaces littoraux. Une application à l'étang de Thau
Provedor de dados: 5
Autores: Rudloff, M.a.; Salles, J.m.
In light of the diminishing wetlands, collective management of these natural areas is becoming a major issue in many countries, particularly in Europe. As a multi-use space, wetlands are coastal areas that are, in practice, subject to conflicts of use among various categories of stakeholders who all consider this natural heritage in terms of their own, and sometimes contradictory, purposes. These conflicts of use can be mediated in several ways. First, wetlands depend on a complex decision process that must integrate diverse rationales. Economic rationales when commercial activities compete; social and political rationales, because natural areas, particularly coastal areas where the human population is particularly dense, are subject to regulations issued...
Tipo: Text
Palavras-chave: SEM.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/rapport-4224.pdf

Le déficit commercial des produits de la mer quels enjeux ?
Provedor de dados: 5
Autores: Weber, Jacques.
The external trade deficit of seafood is a subject of general concern, for the administration as it is for the profession and for research. From IFREMER's inception, its president, Mr SILLARD, made this problem one of the major guiding factors of the Institute by asking, as early as 1984, research teams to provide him with a complete and detailed view of the evaluation of seafood in France. The objective assigned to this task was twofold: assess France's room for manoeuvre and establish a research policy that must contribute to the improvement of this room for manoeuvre. The external trade deficit of sea products is a significant, long-term, structural problem to which it is conceivable to apply partial solutions. It is a national and therefore...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2469.pdf

The evolution of colour in Lepidoptera
Provedor de dados: 16
Autores: Piepers, M.C.
At the Zoological Congress at Cambridge I imparted, especially for the exclusively English speaking and reading entomological public, some notions on this biological phenomenon, the existence of which I think to have discovered by studying the ontogenesis of caterpillars of Sphingidae, and also in the imagines of several families of Rhopalocera, more particularly in those of the Pieridae; the results of these studies have however been published in German. Now, before the Transactions of that Congress had been published, an article entitled » The Colours and Pigments of Butterflies” by Miss M. I. Newbegin appeared in the February number of »Natural Science”, in which, besides some other papers of these latter days on the same subject, she also discusses my...
Tipo: Article / Letter to the editor
Ano: 1900
URL: http://www.repository.naturalis.nl/record/509203

The geology of Liébana, Cantabrian Mountains, Spain; deposition and deformation in a flysch area
Provedor de dados: 16
Autores: Maas, K.
The Nansa-Deva map sheet of the Geological Map of the Southern Cantabrian Mountains is published. The accompanying thesis deals with the stratigraphy and structures of the Devonian, Carboniferous, Permian and Mesozoic rocks which constitute the mapped area. A condensed sequence of nodular limestones and shales was deposited in the larger part of the area during Middle-Upper Devonian and Lower Carboniferous. The rocks of this time interval are preserved badly, occurring for a large part as exotics in Upper Carboniferous ‘Wildflysch’ deposits. The establishment of a stratigraphic record for these largely allochthonous occurrences was enabled by examination of their conodont content and by comparing them lithostratigraphically and biostratigraphically with...
Tipo: Article / Letter to the editor
Ano: 1976
URL: http://www.repository.naturalis.nl/record/505791

The Role of Cognitive Dissonance in Social Networks
Provedor de dados: 17
Autores: Henrique Akiba; Alvaro Machado Dias; Eduardo Oda; Ricardo Ikeda; Mauri Oliveira.
Context:&amp;#xd;&amp;#xa;The principles behind the process of creating new, spontaneous sequences out of previously ordered non-declarative stimuli have been scarcely addressed and, for such reason, remain highly unknown. &amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;Objective:&amp;#xd;&amp;#xa;This paper has four interconnected goals: &amp;#xd;&amp;#xa;(1) Introduce a new software-based neuropsychological test that can be used as a means to assess key aspects of the way people order and reorder non-declarative stimuli, based upon cognitive dissonance principles; (2) introduce a mathematical approach to the latter in ordering/re-ordering of non-declarative stimuli; &amp;#xd;&amp;#xa;(3) assess whether the principles of cognitive dissonance in ordering/re-ordering...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/6682/version/1

Distribución de las corrientes superficiales y subsuperficiales en la Caleta Aeolian-Isla Baltra
Provedor de dados: 20
Autores: Lucero, M.; Mindiola, M.
Con el objeto de determinar el patrón de circulación en la Caleta AEOLIAN, en septiembre del 2006 se realizaron mediciones de corrientes a nivel superficial y subsuperficial, periodo correspondiente a una época seca (verano), durante este periodo se realizaron mediciones de perfiles de corrientes utilizando un correntómetro perfilador ADCP WHS300 y de manera adicional se realizaron mediciones de corrientes superficiales para lo cual se utilizaron flotadores a la deriva. El área de estudio esta sujeta a una intensa variación, probablemente debido a la acción conjugada de los vientos, al ciclo mareal, a los efectos topográficos por la cercanía a la línea costera, con velocidades promedios de 0.21 m/s en las capas superficiales, 0.18 m/s en las capas media y...
Tipo: Journal Contribution
Palavras-chave: Current meters; Surface currents; Surface layers; Tidal cycles; Equatorial upwelling; Dry season; Oceanic islands; Nearshore dynamics; Dry season; Http://aims.fao.org/aos/agrovoc/c_2400.
Ano: 2007
URL: http://hdl.handle.net/1834/2394

Instructions to the Marine Meteorological Observers of the U. S. Weather Bureau, 5th edition.
Provedor de dados: 20
The ocean meteorological program of the Weather Bureau calls in general for the making of but one regular observation a day, this, as well known, being made at noon· Greenwich mean time, (civil). However, in certain designated areas from which observations are transmitted by radiotelegraphy an additional regular observation is provided for at Greenwich midnight. Supplementing these regular observations are extra ones made under conditions of threatening or severe weather, gale and storm reports, and descriptive notes of weather experienced between observations, the lastnamed taking the form of a Daily Journal. The total requirements are such, however, as to make the smallest possible demands on observers consistent with the needs of the bureau in meeting...
Tipo: Book
Palavras-chave: Instrument platforms; Meteorological instruments; Oceanographic instruments; Methodology; Standardization; Measurement; Climate; Climatology; Ocean-atmosphere system.
Ano: 1929
URL: http://hdl.handle.net/1834/5237

Towards a systemic research methodology in agriculture: Rethinking the role of values in science
Provedor de dados: 21
Autores: Alrøe, Hugo Fjelsted; Kristensen, Erik Steen.
The recent drastic development of agriculture, together with the growing societal interest in agricultural practices and their consequences, pose a challenge to agricultural science. There is a need for rethinking the general methodology of agricultural research. This paper takes some steps towards developing a systemic research methodology that can meet this challenge – a general self-reflexive methodology that forms a basis for doing holistic or (with a better term) wholeness-oriented research and provides appropriate criteria of scientific quality.   From a philosophy of research perspective, science is seen as an interactive learning process with both a cognitive and a social communicative aspect. This means, first of all, that science plays a role in...
Tipo: Journal paper
Palavras-chave: Research methodology and philosophy Values; Standards and certification.
Ano: 2002
URL: http://orgprints.org/5/1/Towards_a_systemic_research_methodology_preprint_11sep01.pdf

Economic Analysis: Co-generation Using Wind and Biodiesel-Powered Generators
Provedor de dados: 31
Autores: Tiffany,   Douglas G.
Replaced with revised version of paper 10/09/06.
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/14249

Disciplines on Domestic Support in the Doha Round
Provedor de dados: 31
Autores: Blandford,   David.
The elements of a new agreement relating to domestic support for agriculture are set out in the WTO Framework document of July 2004. This introduces the concept of the Overall Trade Distorting Support (OTDS), which is to be disciplined and subject to reduction. In addition, some of the individual components of the OTDS will be subject to minimum required reductions and other elements will be capped. The caps and reduction percentages will define each country's future "entitlement" to Amber and Blue Box support.  A base period OTDS will be calculated as the sum of the current bound Total Aggregate Measure of Support (TAMS), resulting from the Uruguay Round Agreement, plus an allowance for product specific and non-product specific de minimis, plus an...
Tipo: Report
Palavras-chave: International Relations/Trade.
Ano: 2005
URL: http://purl.umn.edu/14571

ANNUAL REPORT RESEARCH PROGRAM 2003/2004
Provedor de dados: 31
Autores: Ethridge,   Don E.; Segarra,   Eduardo; Johnson,   Phillip N.; Malaga,   Jaime E.; Rejesus,   Roderick M.
The department began producing formal reports of research activities in 1995/96 in conjunction with the establishment of the Cotton Economics Research Program; reports on Cotton Economics Research have been done annually since then.  As our research programs expanded and diversified, we initiated a separate Departmental Research Report in 1998/99.  With this annual report we are combining all research reporting into the single report, with more compartmentalization of research programs. This report highlights research activities in the Department of Agricultural and Applied Economics during fiscal year 2003/04.  The overall program has been characterized by its flexibility in addressing varied issues of economic significance and is applied in nature,...
Tipo: Report
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2004
URL: http://purl.umn.edu/31256

Gas exchange in Annona emarginata (Schltdl.) H. Rainer subjected to salt stress and application of plant growth regulator
Provedor de dados: 22
Autores: Dalanhol, Samanta Jaqueline; Mantoan, Luís Paulo Benetti; Amaro, Amanda Cristina Esteves; Ferreira, Gisela.
The aim of this study was to evaluate the effects of the application of plant growth regulator on gas exchange in A. emarginata seedlings subjected to different NaCl concentrations. We evaluated the gas exchange in A. emarginata seedlings subject to the presence and absence of plant growth regulator consisting of kinetin, gibberellic acid, and indolbutyric acid and three concentrations of NaCl (0 mM, 50 mM, and 100 mM). When assessing these factors individually, it was observed that in the presence of plant growth regulators, there was a reduction in stomatal conductance and transpiration, and NaCl concentration (50 mM and 100 mM) caused a reduction in CO2 assimilation, stomatal conductance, and transpiration. There was no significant interaction between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auxin; Cytokinin; Gibberellin; Photosynthesis; Sodium chloride.
Ano: 2018
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/16139

Allergy prevention: consumer perspectives
Provedor de dados: 26
Autores: Reading, D.
Consumer concerns about allergy have increased considerably in the last decade. Peanut allergy in particular has generated panic among many families, and there is often a misconception that children affected are unlikely to reach adulthood. Patientsupport organizations offer essential advice and guidance to these people, with a great deal of effort directed towards allergen avoidance. The Anaphylaxis Campaign receives approximately 20,000 enquiries annually - the vast majority being people seeking information about food allergy - and every year sends out 140,000 information sheets. Its website (www.anaphylaxis.org.uk) attracts 4,000 visits per day. Allergen avoidance is difficult enough for the person with access to high-quality information, but much...
Tipo: Conference proceedings
Ano: 2005
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1075

CHUMBO E ZINCO EM SOLOS E PLANTAS ÀS MARGENS DE UMA RODOVIA COMO INDICADORES DE POLUIÇÃO
Provedor de dados: 25
Autores: Silva, Luis Celso; Almeida, Ana Aparecida Silva.
Due to fast urbanization and the access and traffic facilities, many cities had been constructed close the great highways, where soils next to these highways are subject to many potential pollution sources, mainly the emissions from discharge for automotive vehicles. Concentrations of lead and zinc had been determined in soils and plants samples within 50 m of the edges from Presidente Dutra highway, in the valley of the Paraíba do Sul River, in the southeastern region of Brazil. The results had shown that the biggest concentrations of these metals find at 0-10 m of distance from the highway edges and decrease with increasing distance from highway. The average Pb and Zn concentrations in the study areas, respectively, were: 34,9 e 189,6 ppm (0-10 m); 10,6...
Tipo: Article
Palavras-chave: Poluição do solo; Sontaminação do solo; Metais pesados; Fitoextração.
Ano: 2011
URL: http://hdl.handle.net/2315/182

Drivers of Change in Socio-Ecological Production Landscapes: Implications for Better Management
Provedor de dados: 7
Autores: Gu, Hongyan; Shanghai Academy of Social Sciences; United Nations University Institute for the Advanced Study of Sustainability; gu@sass.org.cn; Subramanian, Suneetha M.; United Nations University Institute for the Advanced Study of Sustainability; subramanian@ias.unu.edu.
The term socio-ecological production landscapes (SEPLs) has recently gained currency in conservation circles because of a recognized need to look beyond protected areas to the management of human-influenced landscapes and ecosystems. We have drawn on a variety of case studies from Asia and other parts of the world to understand the underlying driving forces that have led to the need for greater awareness and sustainable management of SEPLs. We have analyzed the drivers of these changes from socio-political, legal, economic, and socio-cultural perspectives. The analysis shows that SEPLs contribute to local, national, and global economies, and their production and harvesting processes are subject to external demands and pressures. Policy makers should...
Tipo: Peer-Reviewed Reports
Palavras-chave: Case study; Conservation; Cultural landscapes; Drivers of change; Ecosystem approach; Resilience.
Ano: 2014

Using Pollination Deficits to Infer Pollinator Declines: Can Theory Guide Us?
Provedor de dados: 7
Autores: Thomson, James D; University of Toronto; jthomson@zoo.toronto.edu.
Authors examining pollinator declines frequently discuss pollination deficits, either as contemporary evidence that declines have occurred or as a possible negative consequence of future declines. Because pollination deficits can be measured in short-term studies, it would be useful if such studies could somehow replace painstaking documentation of insect population trends. I examine the legitimacy of this type of substitution with reference to evolutionary theory and natural plant populations. Operationally, pollination deficits are detected through pollen supplementation experiments. Although simple, these experiments are subject to subtleties of interpretation because of biases and nonlinear responses, which I discuss. Although it has been found that,...
Tipo: Peer-Reviewed Reports
Ano: 2001

Conceptualizing, Observing, and Influencing Social&amp;#8211;Ecological Transitions
Provedor de dados: 7
Autores: Fischer-Kowalski, Marina; Institute of Social Ecology,  Alpen Adria University; marina.fischer-kowalski@uni-klu.ac.at; Rotmans, Jan; DRIFT (Drift Research Institute for Transitions) Erasmus University, Rotterdam, The Netherlands; rotmans@fsw.eur.nl.
This article creates a meeting ground between two distinct and fairly elaborate research traditions dealing with social &amp;#8220;transitions&amp;#8221;: the Dutch societal transitions management approach, and the Viennese sociometabolic transitions approach. Sharing a similar understanding of sustainability transitions&amp;#8212;namely as major transformational changes of system characteristics&amp;#8212;and a background epistemology of complex systems, autopoeisis, and evolutionary mechanisms, they address the subject from different angles: one approach asks how transformative changes happen and what they look like, and the other approach tries answer the question of how to bring them about. The Viennese approach is almost exclusively analytical and...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Social metabolism; Sociometabolic regimes; Transition management.
Ano: 2009

Can Properties of Labor-Exchange Networks Explain the Resilience of Swidden Agriculture?
Provedor de dados: 7
Autores: Downey, Sean S.; Stanford University; ssdowney@stanford.edu.
Despite the fact that swidden agriculture has been the subject of decades of research, questions remain about the extent to which it is constrained by demographic growth and if it can adapt to environmental limits. Here, social network analysis is used to analyze farmer labor-exchange networks within a chronosequence of five Q&amp;#8217;eqchi&amp;#8217; Maya villages where swidden agriculture is used. Results suggest that changes in land-use patterns, network structure, reciprocity rates, and levels of network hierarchy may increase the resilience of these villages to changes in the forest&amp;#8217;s agricultural productivity caused by ongoing agricultural activity. I analyze the suitability of subsistence- versus market-oriented agricultural labor for...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive cycle; Common-property resource management; Labor exchange; Maya; Panarchy; Q&amp;#8217; Eqchi&amp;#8217; Resilience; Social network analysis; Swidden.
Ano: 2010

Complex Land Systems: the Need for Long Time Perspectives to Assess their Future
Provedor de dados: 7
Autores: Dearing, John A.; University of Southampton; j.dearing@soton.ac.uk; Braimoh, Ademola K.; Global Land Project, Sapporo Nodal Office, Hokkaido University; World Bank; abraimoh@glp.hokudai.ac.jp; Reenberg, Anette; Global Land Project, International Project Office, University of Copenhagen; Ar@geogr.ku.dk; Turner, Billie L.; Arizona State University; Billie.L.Turner@asu.edu; van der Leeuw, Sander; Arizona State University; vanderle@asu.edu.
The growing awareness about the need to anticipate the future of land systems focuses on how well we understand the interactions between society and environmental processes within a complexity framework. A major barrier to understanding is insufficient attention given to long (multidecadal) temporal perspectives on complex system behavior that can provide insights through both analog and evolutionary approaches. Analogs are useful in generating typologies of generic system behavior, whereas evolutionary assessments provide insight into site-specific system properties. Four dimensions of these properties: (1) trends and trajectories, (2) frequencies, thresholds and alternate steady states, (3) slow and fast processes, and (4) legacies and contingencies, are...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Adaptation; Complex systems; Global Land Project; Land systems; Multidecadal timescales; Resilience; Socioecological systems; Sustainability science.
Ano: 2010

Managing urban water crises: adaptive policy responses to drought and flood in Southeast Queensland, Australia
Provedor de dados: 7
Autores: Head, Brian W.; The University of Queensland; brian.head@uq.edu.au.
In this case study, I examine the quality of decision-making under conditions of rapidly evolving urban water crises, and the adaptive policy challenges of building regional resilience in response to both drought and flood. Like other regions of Australia, Southeast Queensland has been subject to substantial cycles of drought and flood. I draw on resilience literature concerning sustainability, together with governance literature on policy change, to explain the changing awareness of urban water crises and the strategic options available for addressing these crises in this case study. The problem of resilience thinking opens up a number of important questions about the efficacy and adaptability of the policy system. The case provides insights into the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Policy learning; Regional resilience; Urban water crisis; Water governance; Water policy.
Ano: 2014

Ecological and Social Dynamics in Simple Models of Ecosystem Management
Provedor de dados: 7
Autores: Carpenter, Stephen R; University of Wisconsin-Madison; srcarpen@wisc.edu; Brock, William; University of Wisconsin; brock@macc.wisc.edu; Hanson, Paul; University of Wisconsin; pchanson@facstaff.wisc.edu.
Simulation models were developed to explore and illustrate dynamics of socioecological systems. The ecosystem is a lake subject to phosphorus pollution. Phosphorus flows from agriculture to upland soils, to surface waters, where it cycles between water and sediments. The ecosystem is multistable, and moves among domains of attraction depending on the history of pollutant inputs. The alternative states yield different economic benefits. Agents form expectations about ecosystem dynamics, markets, and/or the actions of managers, and choose levels of pollutant inputs accordingly. Agents have heterogeneous beliefs and/or access to information. Their aggregate behavior determines the total rate of pollutant input. As the ecosystem changes, agents update their...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive agent models; Adaptive management; Bounded rationality; Ecological economics; Ecosystem oscillations; Integrated models; Lake eutrophication; Nonpoint pollution; Phosphorus cycles; Simulation models; Social-natural systems.
Ano: 1999

The Multiple Use of Tropical Forests by Indigenous Peoples in Mexico: a Case of Adaptive Management
Provedor de dados: 7
Autores: Moguel, Patricia; ;.
The quest for an appropriate system of management for tropical ecosystems necessitates that ecologists consider the accumulated experiences of indigenous peoples in their long-term  management of local resources, a subject of current ethnoecology. This paper provides data and empirical evidence of an indigenous multiple-use strategy (MUS) of tropical forest management existing in Mexico, that can be considered a case of adaptive management. This conclusion is based on the observation that some indigenous communities avoid common modernization routes toward specialized, unsustainable, and ecologically disruptive systems of production, and yet probably achieve the most successful tropical forest utilization design, in terms of biodiversity conservation,...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive management; Ethnoecology; Indigenous peoples; Mexico; Multiple use; Tropical rain forest.
Ano: 2003

Exploring the Contribution of Fiscal Transfers to Protected Area Policy
Provedor de dados: 7
Autores: Borie, Maud; UMR 5175 CEFE CNRS, Montpellier; maud.borie@gmail.com; Mathevet, Rapha&amp;#235;l; UMR 5175 CEFE CNRS, Montpellier; raphael.mathevet@cefe.cnrs.fr; Ring, Irene; UFZ Helmholtz Centre for Environmental Research; irene.ring@ufz.de; Thompson, John D.; UMR 5175 CEFE CNRS, Montpellier; john.thompson@cefe.cnrs.fr.
Biodiversity payments have become an increasingly proposed tool to promote conservation measures. An unexplored issue concerns the potential role of fiscal transfers between the state and infra-national authorities potentially as direct financial incentives for biodiversity conservation. We explore how protected areas can be taken into account in a redistributive fiscal transfer system between the state and local authorities, i.e., municipalities. Different simulations were made in the Mediterranean region of southern France, a major biodiversity hotspot subject to increasing threats. We examined two methods for fiscal transfer: first, a &amp;#8220;per hectare&amp;#8221; method, based on the surface of the protected area within the boundaries of the...
Tipo: Peer-Reviewed article
Palavras-chave: Biodiversity; Conservation policy; Ecological solidarity; Fiscal transfer; Protected areas; Public funding.
Ano: 2014

Periodic Closures as Adaptive Coral Reef Management in the Indo-Pacific
Provedor de dados: 7
Autores: Cinner, Josh; James Cook University; joshua.cinner@jcu.edu.au; Marnane, Michael J; Wildlife Conservation Society;; McClanahan, Timothy R; Wildlife Conservation Society; tmcclanahan@wcs.org; Almany, Glenn R.; James Cook University;.
This study explores the social, economic, and ecological context within which communities in Papua New Guinea and Indonesia use adaptive coral reef management. We tested whether periodic closures had positive effects on reef resources, and found that both the biomass and the average size of fishes commonly caught in Indo-Pacific subsistence fisheries were greater inside areas subject to periodic closures compared to sites with year-round open access. Surprisingly, both long-lived and short-lived species benefited from periodic closures. Our study sites were remote communities that shared many socioeconomic characteristics; these may be crucial to the effectiveness of adaptive management of reef resources through periodic closures. Some of these factors...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive management; Coral reefs; Socioeconomic; Periodic closures; Traditional management; Social-ecological systems.
Ano: 2006

Ecosystem service delivery in restoration projects: the effect of ecological succession on the benefits of tidal marsh restoration
Provedor de dados: 7
Autores: Boerema, Annelies; Ecosystem Management Research Group, University of Antwerp; annelies.boerema@uantwerpen.be; Geerts, Lindsay; Ecosystem Management Research Group, University of Antwerp; lindsay.geerts@uantwerpen.be; Oosterlee, Lotte; Ecosystem Management Research Group, University of Antwerp; lotte.oosterlee@uantwerpen.be; Temmerman, Stijn; Ecosystem Management Research Group, University of Antwerp; stijn.temmerman@uantwerpen.be; Meire, Patrick; Ecosystem Management Research Group, University of Antwerp; patrick.meire@uantwerpen.be.
Long-term assessment of ecosystem restoration projects is complex because of ecological processes such as succession, particularly in highly dynamic ecosystems such as estuaries. Restoration of intertidal flats and marshes on formerly embanked land, often called managed coastal realignment (MR), became popular in estuarine management. In our study, biophysical and monetary data were collected to calculate the value of 15 (sub)ecosystem services (ES) delivered by a large tidal marsh restoration project in the Schelde estuary in Belgium and the Netherlands. We hypothesized that ES delivery changes over time due to ecological succession and hence the long-term benefits are subject to this phenomenon and need to be taken into consideration. A marsh sediment...
Tipo: Peer-Reviewed Reports
Palavras-chave: Long-term benefits; Managed coastal realignment (MR); Marsh succession; Monetary valuation; Temporal scale.
Ano: 2016

Strong connections, loose coupling: the influence of the Bering Sea ecosystem on commercial fisheries and subsistence harvests in Alaska
Provedor de dados: 7
Autores: Haynie, Alan C; Resource Ecology and Fisheries Management Division, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration; alan.haynie@noaa.gov; Huntington, Henry P; Eagle River, Alaska; hph@alaska.net.
Human-environment connections are the subject of much study, and the details of those connections are crucial factors in effective environmental management. In a large, interdisciplinary study of the eastern Bering Sea ecosystem involving disciplines from physical oceanography to anthropology, one of the research teams examined commercial fisheries and another looked at subsistence harvests by Alaska Natives. Commercial fisheries and subsistence harvests are extensive, demonstrating strong connections between the ecosystem and the humans who use it. At the same time, however, both research teams concluded that the influence of ecosystem conditions on the outcomes of human activities was weaker than anticipated. Likely explanations of this apparently loose...
Tipo: Peer-Reviewed Reports
Palavras-chave: Bering Sea; Commercial fisheries; Ecosystem studies; Human-environment connections; Subsistence.
Ano: 2016

Design and Analysis of Conservation Projects in Latin America: an Integrative Approach to Training
Provedor de dados: 7
Autores: Galindo-Leal, Carlos; Center for Applied Biodiversity Science, Conservation International; C.GALINDO@CONSERVATION.ORG.
The Latin American countries have a disproportionate importance in global biodiversity conservation. Six of the 14 megadiversity countries that house 60&amp;#8211;70% of the species in the world are located on this region. Unfortunately, the number of environmental professionals in Latin America is extremely small. Furthermore, most of them have no postgraduate degrees and are unacquainted with general research methodology and recently developed concepts and tools. In addition, many speak no English and have no way to communicate with colleagues in other parts of the world. In collaboration with Latin American colleagues, universities, government agencies, and nongovernment organizations, I have been developing an integrated field course titled "Design and...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biodiversity conservation; Capacity building; Conservation projects; Field courses; Latin America; Project analysis; Project design.
Ano: 2001

Integrating Traditional Ecological Knowledge and Ecological Science: a Question of Scale
Provedor de dados: 7
The benefits and challenges of integrating traditional ecological knowledge and scientific knowledge have led to extensive discussions over the past decades, but much work is still needed to facilitate the articulation and co-application of these two types of knowledge. Through two case studies, we examined the integration of traditional ecological knowledge and scientific knowledge by emphasizing their complementarity across spatial and temporal scales. We expected that combining Inuit traditional ecological knowledge and scientific knowledge would expand the spatial and temporal scales of currently documented knowledge on the arctic fox (Vulpes lagopus) and the greater snow goose (Chen caerulescens atlantica), two important tundra species. Using...
Tipo: Peer-Reviewed Reports
Palavras-chave: Arctic; Inuit; Protected area; Scale; Chen caerulescens atlantica; Traditional ecological knowledge; Vulpes lagopus; Alopex lagopus; Local ecological knowledge; Scientific knowledge.
Ano: 2009

River Restoration and Meanders
Provedor de dados: 7
Autores: Kondolf, G. Mathias; University of California - Berkeley; kondolf@berkeley.edu.
Among the most visually striking river restoration projects are those that involve the creation of a new channel, often in a new alignment and generally with a form and dimensions that are different from those of the preproject channel. These channel reconstruction projects often have the objective of creating a stable, single-thread, meandering channel, even on rivers that were not historically meandering, on rivers whose sediment load and flow regime would not be consistent with such stable channels, or on already sinuous channels whose bends are not symmetrical. Such meandering channels are often specified by the Rosgen classification system, a popular restoration design approach. Although most projects of this type have not been subject to objective...
Tipo: Peer-Reviewed Reports
Palavras-chave: River restoration; Meandering channels; Cultural preferences; Channel classification.
Ano: 2006

Games for groundwater governance: field experiments in Andhra Pradesh, India
Provedor de dados: 7
Autores: Meinzen-Dick, Ruth; International Food Policy Research Institute; R.Meinzen-Dick@cgiar.org; Chaturvedi, Rahul; Foundation for Ecological Security; rahul.chaturvedi@fes.org.in; Ghate, Rucha; International Center for Integrated Mountain Development; ruchaghate@gmail.com; Janssen, Marco A; Arizona State University; Marco.Janssen@asu.edu; Rollins, Nathan D; Arizona State University; nathan.rollins@asu.edu; Sandeep, K; Foundation for Ecological Security; sandeep@fes.org.in.
Groundwater is a common-pool resource that is subject to depletion in many places around the world as a result of increased use of irrigation and water-demanding cash crops. Where state capacity to control groundwater use is limited, collective action is important to increase recharge and restrict highly water-consumptive crops. We present results of field experiments in hard rock areas of Andhra Pradesh, India, to examine factors affecting groundwater use. Two nongovernmental organizations (NGOs) ran the games in communities where they were working to improve watershed and water management. Results indicate that, when the links between crop choice and groundwater depletion is made explicit, farmers can act cooperatively to address this problem. Longer NGO...
Tipo: Peer-Reviewed Reports
Palavras-chave: Andhra Pradesh; Collective action; Experimental games; Framed field experiments; Groundwater; India.
Ano: 2016

Responding to Globalization: Impacts of Certification on Colombian Small-Scale Coffee Growers
Provedor de dados: 7
Autores: Rueda, Ximena; Department of Environmental Earth System Science, School of Earth Sciences, Stanford University; School of Management, Universidad de los Andes; xrueda@alum.mit.edu.
Eco-certification of food and other agricultural products has been promoted as a way of making markets work for sustainability. Certification programs offer a price premium to producers who invest in more sustainable practices. The literature on the impacts of certification has focused primarily on the economic benefits farmers perceive from participating in these schemes. These benefits, however, are often subject to price variability, offering only a partial explanation of why farmers join and stay in certification programs. We evaluated the potential of the Rainforest Alliance certification program to foster more resilient social-ecological systems in the face of globalization. Using the case of Santander, Colombia, and a pair-based comparison of 86...
Tipo: Peer-Reviewed Reports
Palavras-chave: Coffee; Colombia; Eco-certification; Globalization; Land change.
Ano: 2013

Semiquantitative analysis of genetically modified maize and soybean in food
Provedor de dados: 69
Autores: Cazzola,María Laura; Petruccelli,Silvana.
The aim of this study was to analyze quantitatively the presence of genetically modified organism in food with different composition and degree of processing. Total DNA was extracted by Dellaporta's method and GMO analysis was performed using two consecutives PCR reactions with specie specific primers (IVR and LE), screening primers (35S) and transgen specific primers (CRY and EPSPS). The quantification within the sensitivity establish by the EU was possible only in some foods (ice-cream, flours, soybean isolates and concentrates, starch). Samples with high lipid content or subjected to intense thermal treatments (such as some snacks, mayonnaise, creamy soup) could not be amplified mainly due to the presence of PCR inhibitors. Therefore the method was...
Tipo: Journal article
Palavras-chave: Bt maize; Genetically modified organisms; Semi-quantitative PCR; RR-soybean; Transgenic food.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300028

A microbial community analysis of the octocoral Eunicea fusca
Provedor de dados: 69
Autores: Duque-Alarcón,Angela; Santiago-Vázquez,Lory Z; Kerr,Russell G.
While there is a significant and growing body of knowledge describing the microbial communities of marine invertebrates such as sponges, there are very few such studies focused on octocorals. The octocoral Eunicea fusca is common on reefs in various regions of the Caribbean and has been the subject of natural product investigations. As part of an effort to describe the microbial community associated with octocorals, a culture-independent analysis of the bacterial community of E. fusca was conducted. Specifically, a 16S rDNA clone library analysis was performed to provide baseline data. A total of 40 bacteria members from 11 groups were found. In general, Proteobacteria were the dominant group with a total of 24 species and &amp;#945;-Proteobacteria...
Tipo: Journal article
Palavras-chave: 16S rDNA; Bacteria; Culture-independent analysis; Eunicea fusca; Microbial community; Octocoral.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000500015

Effect of edible quinoa protein-chitosan based films on refrigerated strawberry (Fragaria × ananassa) quality
Provedor de dados: 69
Autores: Valenzuela,Carolina; Tapia,Cristian; López,Luis; Bunger,Andrea; Escalona,Victor; Abugoch,Lilian.
Background Strawberries are non-climacteric fruits with a low respiration rate, but are subject to serious fungal deterioration during postharvest handling. The edible coatings based on chitosan (CH), quinoa protein-chitosan (Q/CH) and quinoa protein-chitosan-sunflower oil (Q/CH/SO) may provide a solution to this problem. Thus, in this work CH, Q/CH and Q/CH/SO were elaborated and applied to fresh strawberries, and its effect on the strawberries shelf life during storage for 15 d was evaluated by mold and yeast count, fungal decay, carbon dioxide rate, physicochemical properties, and sensory evaluation. Results On all analysis days, the strawberries coated with the film-forming CH, Q/CH and Q/CH/SO solutions presented a significant lower amount of mold and...
Tipo: Journal article
Palavras-chave: Chitosan; Edible films; Quinoa protein; Strawberry; Sunflower oil.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600004

Comparative study for the kinetics of extracellular xylanases from Trichoderma harzianum and Chaetomium thermophilum
Provedor de dados: 69
Autores: Ahmed,Sibtain; Imdad,Syeda Sana; Jamil,Amer.
Xylanases assume special importance in the paper and pulp industry as they replace toxic chemicals such as chlorine and chlorine dioxide for developing eco-friendly processes. This study evaluated xylanases produced by two fungi, the mesophilic fungus Trichoderma harzianum and a thermophilic fungus Chaetomium thermophilum. Among the polymeric substrates studied for xylanase production by both the fungi, birch wood xylan was found to be the best inducer of xylanases. Xylanases induction was subject to glucose repression. Partially purified xylanases preparation from T. harzianum and C. thermophilum exhibited optimal activities at pH 5 and 6 and at 60ºC and 70ºC, respectively. The apparent Km and Vmax values for the partially purified xylanase from T....
Tipo: Journal article
Palavras-chave: C. thermophilum; Kinetics; T. harzianum; Xylanase.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000300003

Plant-antivenom: Database of anti-venom medicinal plants
Provedor de dados: 69
Autores: Amui,Saulo França; Puga,Renato David; Soares,Andreimar Martins; Giuliatti,Silvana.
Plant-antivenom is a computational Websystem about medicinal plants with anti-venom properties. The system consists of a database of these plants, including scientific publications on this subject and amino acid sequences of active principles from venomous animals. The system relates these data allowing their integration through different search applications. For the development of the system, the first surveys were conducted in scientific literature, allowing the creation of a publication database in a library for reading and user interaction. Then, classes of categories were created, allowing the use of tags and the organization of content. This database on medicinal plants has information such as family, species, isolated compounds, activity, inhibited...
Tipo: Journal article
Palavras-chave: Animal venoms; Natural plant inhibitors; Web system.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000100006

Production of &amp;#946;-glucosidase on solid-state fermentation by Lichtheimia ramosa in agroindustrial residues: Characterization and catalytic properties of the enzymatic extract
Provedor de dados: 69
Autores: Garcia,Nayara Fernanda Lisboa; Santos,Flávia Regina da Silva; Gonçalves,Fabiano Avelino; Paz,Marcelo Fossa da; Fonseca,Gustavo Graciano; Leite,Rodrigo Simões Ribeiro.
Background &amp;#946;-Glucosidases catalyze the hydrolysis of cellobiose and cellodextrins, releasing glucose as the main product. This enzyme is used in the food, pharmaceutical, and biofuel industries. The aim of this work is to improve the &amp;#946;-glucosidase production by the fungus Lichtheimia ramosa by solid-state fermentation (SSF) using various agroindustrial residues and to evaluate the catalytic properties of this enzyme. Results A high production of &amp;#946;-glucosidase, about 274 U/g of dry substrate (or 27.4 U/mL), was obtained by cultivating the fungus on wheat bran with 65% of initial substrate moisture, at 96 h of incubation at 35°C. The enzymatic extract also exhibited carboxymethylcellulase (CMCase), xylanase, and...
Tipo: Journal article
Palavras-chave: Cellobiase; Cellulases and hemicellulases; Industrial enzymes; Microbial enzymes.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000400010

Influence of various fermentation variables on exo-glucanase production in Cellulomonas flavigena
Provedor de dados: 69
Autores: Rajoka,Muhammad Ibrahim.
The influence of carbon and nitrogen sources on the production of exo-glucanase was investigated. The enzyme production was variable according to the carbon or nitrogen source used. Levels of beta-cellobiohydrolase (CBH) were minimal in the presence of even low concentrations of glucose. Enzyme production was stimulated by other carbohydrates and thus is subject to carbon source control by easily metabolizable sugars. In Dubos medium, on cellobiose, the cellobiohydrolase titres were 2-to 110-fold higher with cells growing on monomeric sugars and 2.7 times higher than cells growing on other disaccharides. alpha-Cellulose was the most effective inducer of beta-cellobiohydrlase and filter paperase (FPase) activities, followed by kallar grass straw....
Tipo: Journal article
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582004000300007

Accommodating the difference in students' prior knowledge of cell growth kinetics
Provedor de dados: 69
Autores: Seters,Janneke van; Ossevoort,Miriam; Goedhart,Martin; Tramper,Johannes.
This paper describes the development and benefits of an adaptive digital module on cell growth to tackle the problem of educating a heterogeneous group of students at the beginning of an undergraduate course on process engineering. Aim of the digital module is to provide students with the minimal level of knowledge on cell growth kinetics they need to comprehend the content knowledge of the subsequent lectures and pass the exam. The module was organised to offer the subject matter in a differentiated manner, so that students could follow different learning paths. Two student groups were investigated, one consisting of students who had received their prior education abroad and one of students that had not. Exam scores, questionnaires, and logged user data...
Tipo: Journal article
Palavras-chave: Adaptive digital learning material; Bioreactor design; Biotechnology; Education; Intelligent tutoring system; Intelligent Web-based educational system.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000200001

A practical approach to the understanding and teaching of RNA silencing in plants
Provedor de dados: 69
Autores: Bazzini,Ariel A; Mongelli,Vanesa C; Hopp,H. Esteban; del Vas,Mariana; Asurmendi,Sebastián.
Gene silencing, also called RNA interference (RNAi) is a specific mechanism of RNA degradation involved in gene regulation, development and defense in eukaryotic organisms. It became an important subject in the teaching programs of molecular biology, genetics and biotechnology courses in the last years. The aim of this work is to provide simple and inexpensive assays to understand and teach gene silencing using plants as model systems. The use of transient and permanent transgenic plants for expressing reporter genes, like those derived from jellyfish green fluorescent protein (gfp) encoding gene, provides a nice, colorful and conclusive image of gene silencing. Three experimental approaches to evidence RNA silencing are depicted. In the first approach...
Tipo: Journal article
Palavras-chave: Gene silencing; GFP; HC-Pro; PDS; Protocols; PTGS; Teaching; Transgenic; Transient expression; TRV; VIGS.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000200002

Economic optimization method to design telescope irrigation of multiples outlets
Provedor de dados: 70
Autores: Pinto,Marinaldo F.; Camargo,Antonio P. de; Coelho,Rubens D.
In this study is presented an economic optimization method to design telescope irrigation laterals (multidiameter) with regular spaced outlets. The proposed analytical hydraulic solution was validated by means of a pipeline composed of three different diameters. The minimum acquisition cost of the telescope pipeline was determined by an ideal arrangement of lengths and respective diameters for each one of the three segments. The mathematical optimization method based on the Lagrange multipliers provides a strategy for finding the maximum or minimum of a function subject to certain constraints. In this case, the objective function describes the acquisition cost of pipes, and the constraints are determined from hydraulic parameters as length of irrigation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conduits in series; Minimum cost; Lagrange multipliers.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000400017

Identification, assessment and ordering of concepts for agro-energy planning and possibilities of spatial analysis
Provedor de dados: 70
Autores: Cervi,Walter R.; Lamparelli,Rubens; Berni,Mauro; Rocha,Jansle.
ABSTRACT The present study aims to present the main concepts of the sugarcane straw to energy planning. Throughout the study, the subject is contextualized highlighting broader aspects of sustainability, which is considered the main driver towards agro-energy modernization. Concerning sugarcane straw, we first evaluated its availability regarding technical and economic aspects, and then it summarized the straw production chain for energy supply purposes. As a proposal to support agro-energy planning, it is presented some spatial tools that have been barely used in the Brazilian energy planning context so far. Therefore, working on straw to electricity associated with supply chain basis, we developed a conceptual model to spatially assess this bioenergy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sugarcane; Straw; Agro-energy planning; Geographic information system.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601210

PERFORMANCE OF ANALYSIS METHODS OF SLOPE STABILITY FOR DIFFERENT GEOTECHNICAL CLASSES SOIL ON EARTH DAMS
Provedor de dados: 70
Autores: Pereira,Tonismar Dos S.; Robaina,Adroaldo D.; Peiter,Marcia X.; Braga,Fabiano De V. A.; Rosso,Ricardo B.
ABSTRACT The aim of this study was to evaluate the performance of less accurate analysis methods of slope stability, in order to reduce the number of operations used by the most accurate methods available in the literature. The study evaluated four methods for calculating slope stability. Fellenius (FELLENIUS, 1936), Bishop (BISHOP, 1955), Simplified Bishop (BISHOP &amp; MORGENSTERN, 1960) and Simplified Janbu (JANBU, 1973) were compared with the Spencer method (SPENCER, 1967), which is considered an accurate method for calculating the factor of safety (FS). The procedure was performed in scenarios with different soil groups according to the Unified Soil Classification System (USCS) (ASTM 2011), heights and slope inclinations, and under conditions of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fellenius; Bishop; Simplified Bishop; Simplified Janbu; Spencer.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601027

Evaluation of cotton stalks destroyers
Provedor de dados: 70
Autores: Bianchini,Aloisio; Borges,Pedro H. de M.
The destruction of the cotton crop residues (cotton stalks) is a mandatory procedure in Brazil for prophylactic issues, but is a subject unexplored by the research and there are few studies that deal with this issue. However, this is not encouraged in recent decades, studies aimed at developing and evaluating equipment for this purpose. The present study had the objective to evaluate six methods for mechanical destruction of cotton crop residues. Each method was defined based on the principle of operation of the active parts of the equipment, which were tested in medium texture soil and in a clayey one. The variables used to evaluate the efficiency of the equipment were the regrowth rate, the theoretical field capacity and energy demand. The equipment with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cotton stalk; Machine performance; Uprooting cotton stalks; Cotton stalk puller.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000500008

Water transfer from São Francisco river to semiarid northeast of Brazil: technical data, environmental impacts, survey of opinion about the amount to be transferred
Provedor de dados: 70
Autores: Stolf,Rubismar; Piedade,Sonia M. de S; Silva,Jair R. da; Silva,Luiz C. F. da; Maniero,Miguel Â.
The transposition of the São Francisco River is considered one of the greatest engineering works in Brazil of all time since it will cross an extensive agricultural region of continental dimensions, involving environmental impacts, water, soil, irrigation, water payment and other multidisciplinary themes. Taking into account its importance, this subject was incorporated into a discipline of UFSCar (Federal University of São Carlos - Brazil) named "Pollution and Environmental Impacts". It was noted strong reaction against the project, even before the presentation. To allow a critical analysis, the first objective was to compile the main technical data and environmental impacts. The second objective was to detect the three most important aspects that cause...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Integration; Water transfer; Volume; Technical data; Northeast; Semiarid.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600001

FUZZY MODEL FOR PREDICTING CLOACAL TEMPERATURE OF BROILER CHICKENS UNDER THERMAL STRESS
Provedor de dados: 70
Autores: Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Campos,Alessandro T.; Lourençoni,Dian; Bahuti,Marcelo.
ABSTRACT Broiler chickens submitted to different intensities and durations of thermal stress are subject to variation in cloacal temperature and, consequently, to a decrease in performance. Given the complexity of these interactions, artificial intelligence is a useful methodology for decision-making. Thus, this study aimed to assess and predict, by means of a fuzzy model, the cloacal temperature of broiler chickens submitted to thermal stress in the second week of life, with varying durations and intensities, in climatized wind tunnels. Mamdani's inference and defuzzification methods by means of the center of gravity were used. One hundred and twenty rules were elaborated. The developed fuzzy model was used to predict the cloacal temperature of broiler...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiological response; Thermal environment; Mathematical modeling; Fuzzy logic.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100018

CLOACAL AND SURFACE TEMPERATURES OF BROILERS SUBJECT TO THERMAL STRESS
Provedor de dados: 70
Autores: Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Campos,Alessandro T.; Bahuti,Marcelo; Fassani,Édison J.
ABSTRACT: The cloacal and surface temperatures are important physiological parameters to quantify the thermal comfort of animals, its variations may occur as a function of thermal variables. In this context, the goal of the present study was to evaluate the cloacal (tclo) and surface (tsur) temperatures of Cobb 500® broilers, in the second week of life, subjected to different air dry-bulb temperature (24, 27, 30 and 33 °C) and stress durations (1, 2, 3 and 4 days). The experiment was carried out in four climate-controlled wind tunnels. Air relative humidity and air velocity were set at 60% and 0.2 m s-1, respectively. The tclo and tsur were measured daily through digital thermometer and thermographic camera, respectively. Analysis of variance and Scott...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal environment; Aviculture; Thermal comfort; Thermographic image; Physiologic parameters.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500877

Mechanical properties of castor beans subject to different drying temperatures aiming to disrupt the bean coat
Provedor de dados: 70
Autores: Bastos,Adriano C.; Ferraz,Antonio C. De O.
In castor oil extraction process, the bean coat is abrasive to the equipment and releases substances that modify the oil color, reducing its quality. A potential solution would be to run the extraction by compressing only the endosperm. Due to lack of information, the objective of this study was to evaluate the influence of forced air drying at 40, 60, 80 and 100 ºC and farmyard drying, in the mechanical properties of the beans, aiming to break the bean coat. Castor beans were subjected to compression tests, in two perpendicular directions, at a strain rate of 0.6 mm.s-1. Average values of force, deformation energy, strain, all at rupture, and stiffness were used to evaluate the effects of dehydration. It was observed that the heat treatments did not alter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conditioning; Threshing; Decortication; Compression.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000100011

Fuzzy modeling of broiler performance, raised from 1 to 21 days, subject to heat stress
Provedor de dados: 70
Autores: Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Fassani,Édison J.; Campos,Alessandro T.; Lourençoni,Dian.
ABSTRACT Given the need to obtain systems to better control broiler production environment, we performed an experiment with broilers from 1 to 21 days, which were submitted to different intensities and air temperature durations in conditioned wind tunnels and the results were used for validation of afuzzy model. The model was developed using as input variables: duration of heat stress (days), dry bulb air temperature (°C) and as output variable: feed intake (g) weight gain (g) and feed conversion (g.g-1). The inference method used was Mamdani, 20 rules have been prepared and the defuzzification technique used was the Center of Gravity. A satisfactory efficiency in determining productive responses is evidenced in the results obtained in the model...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fuzzy logic; Animal environment; Poultry.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000600967

Eye orbit geometric shape in Liolaemus as an indicator of polygyny or monogamy
Provedor de dados: 72
Autores: Vidal Maldonado,Marcela. A.
Most animal groups have sexual dimorphism in morphological characters, especially body size. In many cases, sexual dimorphism may be a consequence of a hierarchical social organization within populations. However, polygyny or monogamy may evolve independently of sexual dimorphism. Two Liolaemus species are known to be good model species to study the relationship between sexual dimorphism and sexual social system: Liolaemus tenuis (polygyny) and Liolaemus copiapoensis (monogamy). In this study, I evaluate the morphological variation in the geometric shape of the orbit between sexes in the two species, comparing their social condition (polygyny, monogamy) and applying a geometric morphometrical methodology. The results show morphological differentiation in...
Tipo: Journal article
Palavras-chave: Geometric morphometrics; Liolaemus copiapoensis; Liolaemus tenuis; Social behavior.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382011000200004

MULTISPECTRAL TRACKING OF PHYTOPLANKTON IN THE COLOMBIAN CARIBBEAN
Provedor de dados: 72
Autores: Ojeda Caicedo,V. V.; Plata Gómez,A.
In a quantitative research study, the concentration and circulation of group of micro-organisms "phytoplankton" have been found trough the images of the ocean colour in the Colombian Caribbean Sea. These images have been observed trough the Sea Star satellite. The method logical procedure was to collect a number of ocean images at the 1A level of the sensor SeaWifs. This only covered the geographical area of study and the seasons of the year. The selection criterion was to give priority to the absence of clouds in the area. Afterwards, the images were analyzed to create mosaics in convenient periods of the to, in turn visualize the periodical changes of the micro-organisms. Thus place with higher concentration of phytoplankton in the study site were...
Tipo: Journal article
Palavras-chave: Ocean color; Primary production; SeaWifs; SeaDas.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300024

Impact of mycorrhizae and irrigation in the survival of seedlings of Pinus radiata D. Don subject to drought
Provedor de dados: 73
Autores: ATALA,CRISTIAN; MUÑOZ-CAPPONI,EDGARDO; PEREIRA,GUILLERMO; NAVARRETE,EDUARDO; OSES,RÓMULO; MOLINA-MONTENEGRO,MARCO.
In drought condition, plants increase survival chance by adjusting their functional traits and by biological associations. Mycorrhizae association and artificial watering have been shown to increase plant survival under drought, especially at early developmental stages when plants are more susceptible. In Chile, Pinus radiata is the most important forest species. It is grown mainly in Central Chile, where precipitations are predicted to drop in 40% and change in frequency in the future due to climate change. Rhizopogon luteolus is an ectomycorrhizae usually associated with Pinus species and has been found to increase drought tolerance. We addressed the effect of R. luteolus inoculation on survival and functional traits of P. radiata seedlings exposed to...
Tipo: Journal article
Palavras-chave: Pinus radiata; Rhizopogon luteolus; Climate change; Ectomycorrhizae; Drought tolerance.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000200009

NON-SYMBIOTIC NITROGEN FIXATION, NET NITROGEN MINERALIZATION AND DENITRIFICATION IN EVERGREEN FORESTS OF CHILOÉ ISLAND, CHILE: A COMPARISON WITH OTHER TEMPERATE FORESTS
Provedor de dados: 73
Autores: Pérez,C.A.; Carmona,M.R.; Armesto,J.J.
Temperate forests in southern Chile offer unique opportunities for studying biogeochemical cycles in the absence of industrial air pollution. Here we compare three important fluxes of the nitrogen (N) cycle in temperate forests of southern Chile, non-symbiotic N fixation, net N mineralization and denitrification, with data from northern temperate forests more affected by air pollution. We studied five evergreen, old-growth forests and one second-growth forest in Chiloé Island, southern Chile. Non-symbiotic N fixation in the litter layer, mineral soil and coarse woody debris was estimated by the acetylene reduction technique. In situ net-N mineralization in the upper mineral soil layer was assessed by the buried bag method. Denitrification rates of mineral...
Tipo: Journal article
Palavras-chave: Denitrification; Nitrogen cycle; Nitrogen fixation; Temperate forests; Unpolluted forests.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100005

Mutagenic activity of airborne particulate matter from the urban area of Porto Alegre, Brazil
Provedor de dados: 74
Autores: Vargas,Vera Maria Ferrão; Horn,Rubem Cesar; Guidobono,Régis Rolim; Mittelstaedt,Ana Beatriz; Azevedo,Irascema Girardi de.
The mutagenic activity of airborne particulate matter collected from three different sites within the urban area of Porto Alegre, Brazil, was investigated using a Salmonella/microsome assay. Samples were extracted by sonication, sequentially, with cyclohexane (CX), and dichloromethane (DCM), for a rough fractionation by polarity. The different fractions were tested for mutagenicity using Salmonella typhimurium strains TA98, with and without metabolic activation (S9 mix fraction), and TA98NR and TA98/1,8-DNP6, without metabolic activation. Mutagenic response was observed for frameshift strain TA98 in assays with and without metabolization for two sites (sites 2 and 3), which had considerable risk of environmental contamination by nonpolar (CX) and/or...
Tipo: Info:eu-repo/semantics/article
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000200013

Genetic differentiation of Macrodon ancylodon (Sciaenidae, Perciformes) populations in Atlantic coastal waters of South America as revealed by mtDNA analysis
Provedor de dados: 74
Autores: Santos,Simôni; Schneider,Horacio; Sampaio,Iracilda.
The king weakfish (pescada-gó in Portuguese - Macrodon ancylodon (Sciaenidae), a demersal (bottom-feeding) species found in South America Atlantic coastal waters from the Gulf of Paria in Venezuela to Baia Blanca in Argentina, is an economically important species because of its abundance and wide acceptance by consumers. Because of its wide distribution this fish may be subject to geographic isolation and this may have resulted in distinct populations along its coastal range. Considering that this species represents an important economic resource, confirmation of whether M. ancylodon is a single species or there are different genetic stocks spread over its wide distribution would be an important contribution to conservation policies and population...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macrodon ancylodon; Sciaenidae; Perciformes; 16S rRNA; Cytochrome b; Genetic differentiation.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000200008

Different levels of hsp70 and hsc70 mRNA expression in Iberian fish exposed to distinct river conditions
Provedor de dados: 74
Autores: Jesus,Tiago F.; Inácio,Ângela; Coelho,Maria M.
Comprehension of the mechanisms by which ectotherms, such as fish, respond to thermal stress is paramount for understanding the threats that environmental changes may pose to wild populations. Heat shock proteins are molecular chaperones with an important role in several stress conditions such as high temperatures. In the Iberian Peninsula, particularly in Portugal, freshwater fish of the genus Squalius are subject to daily and seasonal temperature variations. To examine the extent to which different thermal regimes influence the expression patterns of hsp70 and hsc70 transcripts we exposed two species of Squalius (S. torgalensis and S. carolitertii) to different temperatures (20, 25, 30 and 35 ºC). At 35 ºC, there was a significant increase in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyprinidae; Heat shock proteins; Squalius; Thermal stress.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100009

Prevalence and impact of founder mutations in hereditary breast cancer in Latin America
Provedor de dados: 74
Autores: Ashton-Prolla,Patricia; Vargas,Fernando Regla.
Approximately 10% of all cancers are considered hereditary and are primarily caused by germline, high penetrance mutations in cancer predisposition genes. Although most cancer predisposition genes are considered molecularly heterogeneous, displaying hundreds of different disease-causing sequence alterations, founder mutations have been identified in certain populations. In some Latin American countries, founder mutations associated with increased risk of breast and other cancers have been described. This is particularly interesting considering that in most of these countries, populations are highly admixed with genetic contributions from native populations and from the influx of several distinct populations of immigrants. In this article, we present a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breast cancer genes; BRCA1; BRCA2; TP53; Cancer predisposition.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000200009

Evaluation of genotoxicity using the micronucleus assay and nuclear abnormalities in the tropical sea fish Bathygobius soporator (Valenciennes, 1837) (Teleostei, Gobiidae)
Provedor de dados: 74
Autores: Galindo,Toni P.; Moreira,Lília M.
The micronucleus and nuclear abnormalities assays have been used increasingly to evaluate genotoxicity of many compounds in polluted aquatic ecossystems. The aim of this study is to verify the efficiency of the micronucleus assay and nuclear abnormality assay in field and laboratory work, when using erythrocytes of the tropical marine fish Bathygobius soporator as genotoxicity biomarkers. Gill peripheral blood samples were obtained from specimens of Bathygobius soporator. In order to investigate the frequencies of micronuclei and to assess the sensitivity of species, the results were compared with samples taken at the reference site and maintained in the laboratory, and fish treated with cyclophosphamide. The micronucleus assay was efficient in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micronucleus assay; Nuclear abnormality assay; Genotoxicity; Frillfin goby; Bathygobius soporator.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200029

Codominant inheritance of polymorphic color variants of Gracilaria domingensis (Gracilariales, Rhodophyta)
Provedor de dados: 74
Autores: Plastino,Estela M.; Guimarães,Melina; Matioli,Sergio R.; Oliveira,Eurico C.
Agar is the most valuable phycocoloid in the world market. Currently, about half of its production is obtained from the red alga Gracilaria (Gracilariales, Rhodophyta). Consequently, this genus has been the subject of many studies worldwide. A common green color variant of G. domingensis (Kützing) Sonder ex Dickie was found in a natural population on the northeastern coast of Brazil. Crosses were performed to determine the mode of color inheritance. The results can be interpreted as the expression of a pair of codominant alleles, where the green and red phenotypes are homozygous, and the heterozygotes present a brownish color. Heterozygous tetrasporophytes, at least until they are 4-5 cm long, exhibit a parental influence on the female gametophyte, since...
Tipo: Info:eu-repo/semantics/article
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100020

Salt stress affects mRNA editing in soybean chloroplasts
Provedor de dados: 74
Autores: Rodrigues,Nureyev F.; Fonseca,Guilherme C. da; Kulcheski,Franceli R.; Margis,Rogério.
Abstract Soybean, a crop known by its economic and nutritional importance, has been the subject of several studies that assess the impact and the effective plant responses to abiotic stresses. Salt stress is one of the main environmental stresses and negatively impacts crop growth and yield. In this work, the RNA editing process in the chloroplast of soybean plants was evaluated in response to a salt stress. Bioinformatics approach using sRNA and mRNA libraries were employed to detect specific sites showing differences in editing efficiency. RT-qPCR was used to measure editing efficiency at selected sites. We observed that transcripts of NDHA, NDHB, RPS14 and RPS16 genes presented differences in coverage and editing rates between control and salt-treated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Small RNA; Chloroplast; RNA editing; PPR; Salt stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200200

Lack of detection of human papillomavirus DNA in prostate carcinomas in patients from northeastern Brazil
Provedor de dados: 74
Autores: Araujo-Neto,Ari P.; Ferreira-Fernandes,Hygor; Amaral,Carolina M.M.; Santos,Lina G.; Freitas,Antônio C.; Silva-Neto,Jacinto C.; Rey,Juan A.; Burbano,Rommel R.; Silva,Benedito B. da; Yoshioka,France K.N.; Pinto,Giovanny R.
Abstract Prostate cancer is the second most common cancer among men in western populations, and despite its high mortality, its etiology remains unknown. Inflammatory processes are related to the etiology of various types of tumors, and prostate inflammation, in particular, has been associated with prostate cancer carcinogenesis and progression. Human papillomavirus (HPV) is associated with benign and malignant lesions in the anogenital tract of both females and males. The possible role of HPV in prostate carcinogenesis is a subject of great controversy. In this study, we aimed to examine the prevalence of HPV infections in prostate carcinomas of patients from northeastern Brazil. This study included 104 tissue samples from primary prostate carcinoma...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Human papillomavirus; Prostate cancer; Prevalence; HPV PCR detection; Molecular epidemiology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100024

Planning and implementing experiments and analyzing experimental data in vegetable crops: problems and solutions
Provedor de dados: 75
Autores: Lúcio,Alessandro Dal’Col; Sari,Bruno Giacomini.
ABSTRACT The statistical interpretation of experimental results is inherent to the research process. Therefore, every researcher is expected to have basic understanding on the subject. In vegetable crops, the planning, implementing and data gathering is more complex due to specific aspects related to this group of plants, such as intensive management and high labor requirement to carry out the experiments, uneven fruit maturation and heterogeneity of the experimental area. Since all these factors are sources of variability within the experiment, circumventing them in the experiment planning and implementing phases is fundamental to reduce the experimental error. Furthermore, the knowledge of statistical tests and the assumptions for their use is equally...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural experimentation; Experimental precision; Experimental error; Experimental designs; Applied statistics; Analysis of variance; Horticulture.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000300316

Chemical stress reduces the lateral shoot growth in vernalized garlic
Provedor de dados: 75
Autores: Gabriel,André; Resende,Juliano TV; Marodin,Josué C; Matos,Rafael de; Zeist,André R; Maciel,Cleber Daniel G.
ABSTRACT Brazil’s low garlic productivity is attributed, mainly to the lateral shoot growth, a physiological anomaly characterized by early lateral shoot growth of cloves in noble group garlic cultivars. Considering the aforementioned information, the aim was to evaluate the occurrence of lateral shoot growth and productivity characteristics in garlic plants, cv. Chonan, subject to herbicide chemical stress. In order to do so, an experiment was conducted in outlining randomized blocks in a 3x5 factorial scheme, constituted by three herbicides (paraquat 500 g ha-1; ammonium gluphosinate 400 g ha-1 and glyphosate 720 g ha-1) and five subdoses (0, 5, 10, 15 and 20% of the minimum recommended dose of each herbicide). The electron transport rates (ETR) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium sativum; Herbicide; Electron transport rate.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000100041

Postharvest losses of perishables in Brazil: what do we know so far?
Provedor de dados: 75
Autores: Henz,Gilmar Paulo.
ABSTRACT Although difficult to pin down an exact figure, the idea that postharvest losses (PHL) of perishables in Brazil stand at 30-45% has been widely accepted. In spite of the modernization of production systems and the logistics and distribution of perishables in the last decades, postharvest losses continue to be a persistent and relevant problem. However, little is known about what has already been published on the subject. This work addresses precisely this issue, based on a comprehensive survey of publications on PHL of fruits and vegetables. Bibliographic searches were performed at the Embrapa’s library system, Google Scholar and SciELO. Several publications on PHL of fruits and vegetables were reviewed and grouped according to their scope and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Waste; Fruits; Vegetables; Estimates; Publications.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000100006

Effect of biostimulant application and long-term storage on the nutritional value of carrot
Provedor de dados: 75
Autores: Wszelaczyńska,Elżbieta; Szczepanek,Małgorzata; Pobereżny,Jarosław; Kazula,Maciej J.
ABSTRACT The nutritional value of carrot is determined by the content of total sugars and monosaccharides, carotenoids and vitamins, including vitamin C, in its roots. In 2009-2011, field experiments were carried out concerning the effect of biostimulating preparations applied during the carrot vegetation period on selected nutrients of its roots (total sugars, monosaccharides, carotenoids and vitamin C). Two biostimulants were foliarly applied in doses of 2 or 3 L ha-1 on various dates. Kelpak SL and Asahi SL: one, two or three applications; where, second and third applied at 2-week interval, additionally Kelpak SL: one application at 4-leaf phase, followed by additional application after 4 weeks. The field study was conducted in a randomized block design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota; Ecklonia maxima; Seaweed; Carotenoids; Vitamin C.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000400451

Структура таксоцена Malacostraca акватории бухты Круглой (юго-западный Крым, Чёрное море)
Provedor de dados: 13
Autores: Ревков, Н. К.; Бондаренко, Л. В.; Гринцов, В. А.
Даётся характеристика состава, количественного развития и структурной организации таксоцена высших ракообразных (Malacostraca) акватории бухты Круглой (юго-западный Крым, Чёрное море).
Tipo: Journal Contribution
Palavras-chave: Zoobenthos; Crustaceans; Taxocene structure; Kruglaya bay; Black Sea.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/641

Does the landscape surrounding streams affect the occurrence of freshwater crabs? A case study of the genus Aegla (Crustacea: Decapoda: Anomura) in subtropical basins
Provedor de dados: 76
Autores: Estevan,Cassiano; Hepp,Luiz U.; Decian,Vanderlei S.; Fornel,Rodrigo.
ABSTRACT Changes in the landscape where watersheds are located may affect the stream biota in different ways. In order to explore this idea, we collected freshwater crabs of the genus Aegla Leach, 1820 in subtropical region of southern Brazil. We also measured a number of landscape features and physico-chemical variables in the collection streams and surroundings in order to ascertain which factors affect the occurrence of these crustaceans. A total of 167 individuals of Aegla were collected in 21 streams. The collection was comprised of three species: A. odebrechtii, A. platensis, and A. singularis. The occurrence of A. platensis was influenced by physico-chemical variables (total carbon and total organic carbon) and stream morphometry factors (level...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Limnological factors; Stream morphometry; Land-use; Anthropization; Agriculture.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100224

Atlas des invertébrés du Golfe de Gascogne inventoriés dans les captures des chaluts. Campagnes RESSGASC 1992-1995 et EVHOE 1995
Provedor de dados: 5
Autores: Paulmier, Gerard.
Numerous invertebrates were collected during various scientific trawling surveys carried out in the Bay of Biscay (RESSGASC, EVHOE), and the adjacent areas between 1993 and 1995. The species captured by the same trawling methods used by professional fishermen represent only a fraction of the known invertebrate fauna in the Bay. In addition to an inventory of the species, a simple key allows easy access to faunistic groups. The species, some of which are economically interesting, form the subject of a short description and, for the most part, a colour illustration.
Tipo: Text
Palavras-chave: Invertebrates; List; Trawling; Gulf of Biscay; Atlas; Invertébrés; Inventaire; Chalutage; Golfe de Gascogne; Atlas.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/rapport-709.pdf

The Catch-Survey Analysis (CSA) method of fish stock assessment: an evaluation using simulated data
Provedor de dados: 5
Autores: Mesnil, Benoit.
The Catch-Survey Analysis (CSA) method of assessment aims at estimating stock abundance from relative indices by filtering measurement error in the latter through a simple two-stage population dynamics model. The method is not widely used and the associated literature is still limited. The objective of this work is to improve current understanding of the properties of the method, using data generated from a known fully age-structured population. A sensitivity analysis confirms that CSA is capable of providing reliable information about general stock trends. However, absolute estimates are sensitive to the parameter relating survey catchabilities of the two stages, which needs to be estimated externally with methods that warrant further validation. Biased...
Tipo: Text
Palavras-chave: Data limited environments; Collie Sissenwine model; Catch Survey Analysis; Stock assessment.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-439.pdf

Les enjeux de la recherche en économie maritime
Provedor de dados: 5
Autores: Abric, M; Weber, Jacques.
In September 1989, Mr Pierre Papon, Chairman of the IFREMER, expressed his wish for a study on the issues of research in marine economy. Carried out under the direction of Jacques Weber, this document is the result of this study. Dealing with marine economy equals, mutatis mutandis, dealing with terrestrial economy: the uniqueness of the subject, economy, as that of the marine element, hides a wide heterogeneity and a multiplicity of research questions. This is the reason why eight different fields were chosen to be investigated. It was decided to take an inventory, for each field, of all the specialised research centres, and to interview their directors or some specialists. Interviews were thus carried out by sector.
Tipo: Text
Palavras-chave: SEM; Economie travail; Aménagement; Gestion; Recherche; Economie maritime.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-3903.pdf

Étude sédimentologique et méiobenthos d'un écosystème lagunaire modifié par un récif artificiel à vocation aquacole : l'acadja
Provedor de dados: 5
Autores: Guiral, D; Gourbault, N; Helleouet, Mn.
In developing countries, recourse to extensive aquaculture systems based on the exploitation of natural aquatic food webs is currently the subject of considerable interest. In this connection, the construction of artificial reefs (known as Acadja) for the development on substrates of living communities, and the utilization of this new production to enhance fish growth have been evaluated in Cote d'Ivoire. This paper describes the granulometric, chemical and biological transformation of the sedimentary ecosystem as a consequence of this practice. In the artificial habitat, an increase in the sedimentation rate of the mineral fraction (definitive trapping of particle resuspension generated by the waves and induced by the wind) and of the organic fraction...
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20796/18421.pdf

Intensive use of Lagrangian trajectories to quantify coastal area dispersion
Provedor de dados: 5
Autores: Petton, Sebastien; Pouvreau, Stephane; Dumas, Franck.
Coastal waters are subject to great environmental and anthropogenic pressures. The diffusion and the transport of these waters are a key element for environmental, ecological and economic management. There are numerous indicators of hydrological characteristics based on theories of transport time scale. However, these indicators strongly depend on the geographical shape of the studied area and tend to give information after long integration time periods, generally on the order of weeks. Here, to qualify a coastal area’s dispersion more precisely, we combined two Lagrangian approaches and estimated a local diffusivity. This paper presents the numerical implementation and the results obtained over a tidally flushed, semi-enclosed water body located at...
Tipo: Text
Palavras-chave: Hydrodynamic model; Lagrangian analysis; Barycentric repositioning method; Local diffusivity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72068/70919.pdf

Sequestration efficiency in the iron-limited North Atlantic: Implications for iron supply mode to fertilized blooms
Provedor de dados: 5
Autores: Le Moigne, Frederic A. C.; Moore, C. Mark; Sanders, Richard J.; Villa-alfageme, Maria; Steigenberger, Sebastian; Achterberg, Eric P.
Estimates of the amount of carbon sequestered in the ocean interior per unit iron (Fe) supplied, as quantified by the sequestration efficiency (C-effx), vary widely. Such variability in C-effx has frequently been attributed to estimate uncertainty rather than intrinsic variability. Here we derive new estimates of C-effx for the subpolar North Atlantic, where Fe stressed conditions have recently been demonstrated. Derived values of C-effx from across the region, including areas subject to atypical external Fe fertilization events during the year of sample collection (2010), ranged from 17 to 19 kmol C (mol Fe-1). Comparing these estimates with values from other systems, considered in the context of variable bloom durations in the different oceanographic...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00290/40112/39249.pdf

Eutrophication: A new wine in an old bottle?
Provedor de dados: 5
Autores: Le Moal, Morgane; Gascuel-odoux, Chantal; Menesguen, Alain; Souchon, Yves; Etrillard, Claire; Levain, Alix; Moatar, Florentina; Pannard, Alexandrine; Souchu, Philippe; Lefebvre, Alain; Pinay, Gilles.
Eutrophication is one of the most common causes of water quality impairment of inland and marine waters. Its best-known manifestations are toxic cyanobacteria blooms in lakes and waterways and proliferations of green macro algae in coastal areas. The term eutrophication is used by both the scientific community and public policy-makers, and therefore has a myriad of definitions. The introduction by the public authorities of regulations to limit eutrophication is a source of tension and debate on the activities identified as contributing or having contributed decisively to these phenomena. Debates on the identification of the driving factors and risk levels of eutrophication, seeking to guide public policies, have led the ministries in charge of the...
Tipo: Text
Palavras-chave: Eutrophication; Nitrogen; Phosphorus; Algae bloom; Land-sea continuum; Diffuse pollution.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00456/56734/58551.pdf

L'oxygène en été dans l'étang de Thau. Contribution à l'étude du risque de "malaïgue". Année 1989
Provedor de dados: 5
Autores: Tournier, H.; Audabram, D.; Landrein, S.; Deslous Paoli, J.m; Juge, Claude.
The mediterranean lagoon of Thau is subject to dystrophic crisis leading to mortalities of the shells grown there. This study shows that the risk for such a crisis is permanent during the Summer. Disappearing of oxygen, mainly tabes place in the breeding areas and near the bottom because of the concentration of shells and the abundance of biodeposit. A correlation is shown between the level of the oxygen in the water and the speed of the wind which is the main factor of balance.
Tipo: Text
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00039/15001/12335.pdf

The many ways of coping with pressure
Provedor de dados: 5
Autores: Oger, Philippe M.; Jebbar, Mohamed.
The current paper reviews strategies employed by microorganisms from the deep biosphere, especially piezophiles (from the greek piezo = to press and philo = love), to cope with high hydrostatic pressure (HHP) prevailing in these biotopes. The aim of this review is not to constitute an exhaustive report of our current knowledge on the physiology of piezophiles, as recent reviews have covered part of this subject in detail (Abe, 2007; Lauro and Bartlett, 2008; Michiels et al., 2008; Simonato et al., 2006). Rather, we illustrate here, via a few chosen examples, where we stand in our understanding of the mechanisms employed by microorganisms from the depths of our planet to cope with HHP. (C) 2010 Institut Pasteur. Published by Elsevier Masson SAS. All rights...
Tipo: Text
Palavras-chave: Adaptation and evolution; Archaea; Deep biosphere; High hydrostatic pressure; Piezophile; Stress response.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00027/13797/11043.pdf

Impact of Environmental Covariation in Growth and Mortality on Evolving Maturation Reaction Norms
Provedor de dados: 5
Autores: Marty, Lise; Dieckmann, Ulf; Rochet, Marie-joelle; Ernande, Bruno.
Maturation age and size have important fitness consequences through their effects on survival probabilities and body sizes. The evolution of maturation reaction norms in response to environmental covariation in growth and mortality is therefore a key subject of life-history theory. The eco-evolutionary model we present and analyze here incorporates critical features that earlier studies of evolving maturation reaction norms have often neglected: the trade-off between growth and reproduction, source-sink population structure, and population regulation through density-dependent growth and fecundity. We report the following findings. First, the evolutionarily optimal age at maturation can be decomposed into the sum of a density-dependent and a...
Tipo: Text
Palavras-chave: Phenotypic plasticity; Growth-reproduction trade-off; Source-sink population structure; Density dependence; Selection gradient.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14607/11988.pdf

Comparative Analysis of Stability-Genetic Diversity in Seagrass (Posidonia oceanica) Meadows Yields Unexpected Results
Provedor de dados: 5
Autores: Arnaud-haond, Sophie; Marba, Nuria; Diaz-almela, Elena; Serrao, Ester A.; Duarte, Carlos M.
The diversity-stability relationship is the subject of a long-standing debate in ecology, but the genetic component of diversity has seldom been explored. In this study, we analyzed the interplay between genetic diversity and demographic responses to environmental pressures. This analysis included 30 meadows formed by the Mediterranean endemic seagrass, Posidonia oceanica, showing a wide range of population dynamics ranging from a near equilibrium state to steep decline due to strong environmental pressures close to aquaculture installations. Our results show that sedimentation rates are much better predictors of mortality than clonal or genetic components. An unexpected positive trend was observed between genotypic diversity and mortality, along with a...
Tipo: Text
Palavras-chave: Seagrass; Demography; Clonality; Genetic richness; Diversity-stability; Posidonia oceanica.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00006/11693/8498.pdf

Tidal level influence on the spawning process of the sea urchin Paracentrotus lividus (Lamarck, 1816) on a rocky shore (Bay of Biscay).
Provedor de dados: 5
Autores: De Casamajor, Marie-noelle; Mahias, Jeremy; Castets, Virginie; Caill-milly, Nathalie; Bru, Noelle; Lissardy, Muriel.
The sea urchin Paracentrotus lividus is an important exploited resource on the Mediterranean coast and has been the subject of much research. In the Bay of Biscay, the situation is different, as some studies have been conducted on the Spanish Basque coast but few on the French part of that coast. However, the Basque coast offers favourable conditions for the development of this species, and its exploitation could be a source of potential diversification for fishermen, especially in the context of difficulties with some other resources. At the request of the managers of this coastal resource, a study was undertaken on sea urchins to improve knowledge of this stock, particularly about its biological characteristics. In this work, assessment consisted of...
Tipo: Text
Palavras-chave: Sea urchin; Bay of Biscay; Spawning; Tidal level; Rocky coast.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00361/47216/47172.pdf

Lake Agassiz final drainage event in the northwest North Atlantic
Provedor de dados: 5
Autores: Hillaire-marcel, C.; De Vernal, Anne; Piper, David J. W.
The 8.2 ka "climate'' event recorded in Greenland ice cores is subject of debates with respect to causal linkage with a collapse of the Atlantic Meridional Overturning due to the drainage of the late-glacial lake Agassiz. Here, we present records from the NW North Atlantic, down-current the flood discharge route, showing that the 9.5-8 ka interval was marked by a succession of events. The drainage itself corresponds to a twin-layer of carbonate-rich turbidites deposited within the calibrated 8.35-8.5 ka interval. Proxies of sea-surface and deep-current conditions do not indicate significant concomitant changes in the NW North Atlantic. The dataset,however, supports the concept that the 8.2 ka "climate'' event may represent one of the manifestations of...
Tipo: Text
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00235/34645/33006.pdf

In vitro effects of cadmium and mercury on Pacific oyster, Crassostrea gigas (Thunberg), haemocytes
Provedor de dados: 5
Autores: Gagnaire, Beatrice; Thomas Guyon, H; Renault, Tristan.
In the past decades. shellfish culture has developed in a significant way around the world. However, culture areas are Often Subject to recurring anthropic pollution. The recrudescent presence of industrial wastes is a source of heavy metals and results ill pollutant transfer towards the aquatic environment in estuarine areas. Because of their mode of life. bivalves. including Mussels and oysters. are suggested as ideal indicator organisms. The development of techniques allowing the analysis of the effects of Pollutants on bivalve biology may lead to the monitoring of pollutant transfer in estuarine areas. in this context. the effects of cadmium and mercury On defence mechanisms were analysed in Pacific oysters. Crassostrea gigas. Pollutant effects were...
Tipo: Text
Palavras-chave: Toxicity; Cellular activities; Phenoloxidase; Mercury; Cadmium; Flow cytometry; Haemocytes; Crassostrea gigas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-691.pdf

Intermediate Scientific report “Working with two deep-sea ROVs” (French Oceanographic Fleet)
Provedor de dados: 5
Autores: Chavagnac, Valérie; Sarradin, Pierre-marie.
As part of the evolution plan of the French Oceanographic Fleet, the Directory Steering Committee and the MESRI have confirmed in March 2018 to withdraw the usage of the submarine HOV Nautile in the medium term and to begin investigating of a “scenario with two deep-sea ROVs”, including the revamping and modernizing of the ROV Victor6000. The outcomes are subject to the positive accreditation by the Direction Steering Committee of the initial (Phase 0) conclusions to be carried out by the Fleet Directorate, so as to assess its technical and budgetary feasibility. The technical Phase 0 of this project had to take into consideration the current technological advances (marine instrumentation or in other domains) or early-stage developments, as well as the...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00594/70657/68848.pdf

Effects of domestication, selection and stress on the energy balance of Sea bass (Dicentrarchus labrax) in aquaculture
Provedor de dados: 5
Autores: Campeas, Arnaud; Millot, Sandie; Chatain, Beatrice; Begout, Marie-laure; Alunno-bruscia, Marianne.
Reared sea bass (Dicentrarchus labrax) represent 13% of the economic weight of the Mediterranean aquaculture production (FAO, 2005) and is a subject of selection program. However, the traditional goal of selection that prevailed in the last century, i.e. increasing productivity, have to be modulated by new objectives such as better feed management or increasing fish welfare. The aim of our study is to evaluate the influence of domestication and selection, and their interactions with stress, on the energy balance in sea bass (Dicentrarchus labrax). Therefore, we used two experimental datasets and analysed their results through a mathematical model. Four strains of sea bass were studied: i) Wild strain, ii) Domesticated strain (first generation obtained by...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00032/14371/11665.pdf

Numerical study of a flexible sail plan: effect of pitching decomposition and adjustments
Provedor de dados: 5
Autores: Augier, Benoit; Hauville, Frédérick; Bot, Patrick; Deparday, Julien; Durand, Mathieu.
A numerical investigation of the dynamic Fluid Structure Interaction (FSI) of a yacht sail plan submitted to harmonic pitching is presented to analyse the effects of motion simpliﬁcations and rigging adjustments on aerodynamic  forces. It is shown that the dynamic behaviour of a sail plan subject to yacht motion clearly deviates from the quasi-steadytheory. Theaerodynamicforcespresentedasafunctionoftheinstantaneousapparentwindangleshow hysteresis loops. These hysteresis phenomena do not result from a simple phase shift between forces and motion. Plotting the hysteresis loops in the appropriate coordinate system enables the associated energy to be determined. This amount of exchanged energy is shown to increase almost linearly with the pitching reduced...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00601/71282/69689.pdf

Fishing effects on diversity, size and community structure of the benthic invertebrate and fish megafauna on the Bay of Biscay coast of France
Provedor de dados: 5
Autores: Blanchard, Fabian; Le Loc'H, Francois; Hily, Christian; Boucher, Jean.
Within the framework of the 'dynamic equilibrium model', we tested the hypothesis that fishing causes major disturbance to benthic communities on deeper bottoms of the continental shelf. Benthic megafauna on the Bay of Biscay coast of France was sampled on fishing grounds subject to various conditions of exploitation. Samples were taken at around 100 m depth to avoid strong natural disturbances. Species diversity and the largest body mass class of invertebrates were smaller in strongly exploited areas than in moderately exploited ones. Biomass size spectra in strongly exploited areas were characterised by a comparatively large biomass of small invertebrates, hence the K-dominance curve of abundance was either above the biomass curve, or the curves...
Tipo: Text
Palavras-chave: Benthic communities; Community dynamics; Disturbance; Diversity; Size spectrum.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00000/10896/7578.pdf

Twentieth century warming in deep waters of the Gulf of St. Lawrence: A unique feature of the last millennium
Provedor de dados: 5
Autores: Thibodeau, Benoit; De Vernal, Anne; Hillaire-marcel, Claude; Mucci, Alfonso.
The impact of human activities on Earth's climate is still subject to debate and the pattern of a sharp recent global temperature increase contrasting with much lesser variable temperatures during preceding centuries has often been challenged, partly due to the lack of unquestionable evidence. In this paper, oxygen isotope compositions of benthic foraminifer shells recovered from sediments of the Lower St. Lawrence Estuary and the Gulf are used to reconstruct temperature changes in a water mass originating from similar to 400 m deep North Atlantic waters. The data demonstrate that the 1.7 +/- 0.3 degrees C warming measured during the last century corresponds to a delta(18)O shift of 0.4 +/- 0.05 parts per thousand, encompassing the temperature effect and...
Tipo: Text
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00231/34176/32910.pdf

Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica
Provedor de dados: 5
Autores: Barruol, Guilhem; Cordier, Emmanuel; Bascou, Jerome; Fontaine, Fabrice R.; Legresy, Benoit; Lescarmontier, Lydie.
The deployment of a seismic network along the Adelie and George V coasts in East Antarctica during the period 2009-2012 provides the opportunity to monitor cryoseismic activity and to obtain new insights on the relationship between tidal cycles and coastal glacier dynamics. Here we focus on records from a seismometer located on a rocky outcrop in the vicinity of the grounding line of the 35 km broad Mertz glacier, a major outflow of this region. We detect numerous icequakes (50,000 events within 10 months and up to 100 events/h) and demonstrate their clear tidal modulation. We suggest that they result from ice friction and fracturing around the rocky peak and from the glacier flexure in response to the falling and rising tides at its grounding area. We...
Tipo: Text
Palavras-chave: Icequakes; Mertz glacier; Tide; Antarctica; Cryoseismology; Adélie land.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00244/35567/34098.pdf

Landscape response to progressive tectonic and climatic forcing in NW Borneo: Implications for geological and geomorphic controls on flood hazard
Provedor de dados: 5
Autores: Menier, David; Mathew, Manoj; Pubellier, Manuel; Sapin, Francois; Delcaillau, Bernard; Siddiqui, Numair; Ramkumar, Mu.; Santosh, M.
Empirical models have simulated the consequences of uplift and orographic-precipitation on the evolution of orogens whereas the effects of these forcings on ridgelines and consequent topography of natural landscapes remain equivocal. Here we demonstrate the feedback of a terrestrial landscape in NW Borneo subject to uplift and precipitation gradient owing to orographic effect, and leading to less-predictable flooding and irreversible damages to life and property. Disequilibrium in a large catchment recording the lowest rainfall rates in Borneo, and adjacent drainage basins as determined through., a proxy for steady-state channel elevation, is shown to result in dynamic migration of water divide from the windward-side of the orogen towards the leeward-side...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00638/75040/75697.pdf

Multi-scale distribution and dynamics of bivalve larvae in a deep atoll lagoon (Ahe, French Polynesia)
Provedor de dados: 5
Autores: Thomas, Yoann; Garen, Pierre; Bennett, Auguste; Le Pennec, Marcel; Clavier, Jacques.
Bivalve larvae and hydrographic parameters were sampled over a range of spatio-temporal scales in a deep atoll lagoon. Bivalve larvae abundances were very high throughout the year: 18,550 m(-3) in average. Larvae were (i) concentrated at mid-depth with nocturnal ascent and diurnal descent, (ii) heterogeneously dispersed at the lagoon scale, (iii) subject to day-to-day variation in abundance and (iv) transferred between different parts of the lagoon providing evidence of intra-lagoonal connectivity. The primacy of physical factors was seen on large spatial scale with the diluting effect of water renewal and transfers by hydrodynamics. On smaller spatial scale, the primacy of biological processes was recognised, with larval swimming activity leading to dial...
Tipo: Text
Palavras-chave: Bivalve larvae; Distribution patterns; Vertical migration; Pinctada margaritifera settlement; Deep atoll lagoon; French Polynesia.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00101/21200/20690.pdf

REMI réseau de contrôle microbiologique des zones de production conchylicole impression 2009
Provedor de dados: 5
Autores: Amouroux, Isabelle.
The coastal environment is subject to multiple sources of contamination: urban wastewater, malfunctioning of collective or individual purification systems, discharge of pollutants from industry, contaminated runoff from agriculture areas. Bivalve mollusks are filter feeders, they concentrate the microorganisms naturally or accidentally present in the surrounding sea water.  The presence of potentially pathogenic bacteria or viruses in coastal waters (Salmonella, Vibrio parahaemolyticus, Vibrio cholerae, hépatitis A virus) may constitute a risk for molluscan shellfish consumers (gastroenteritis, viral hepatitis).
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00014/12571/9440.pdf

A regional numerical ocean model of the circulation in the Bay of Biscay
Provedor de dados: 5
Autores: Friocourt, Yann; Levier, Bruno; Speich, Sabrina; Blanke, Bruno; Drijfhout, S.
The seasonal circulation along the northern Iberian Peninsula and in the Bay of Biscay is investigated by means of a regional ocean model. In particular, the modeled velocities and tracers are compared to available observations and used to hypothesize what the circulation may look like in areas where the density of observations is scarcer. Despite a few biases in the thermohaline properties of some water masses, the model is able to represent the various water masses present in the region in an acceptable way. In particular, the density and depth ranges of most water masses are in good agreement with observed ranges. Similarly, the circulation schemes compare generally well with observations, both in annual mean as for the seasonal features. The model...
Tipo: Text
Ano: 2007
URL: https://archimer.ifremer.fr/doc/2007/publication-3024.pdf

The mangrove's contribution to people: Interdisciplinary pilot study of the Can Gio Mangrove Biosphere Reserve in Viet Nam
Provedor de dados: 5
Autores: Cormier-salem, Marie-christine; Van Trai, Nguyen; Burgos, Ariadna; Durand, Jean-dominique; Bettarel, Yvan; Klein, Judith; Duc Huy, Hoang; Panfili, Jacques.
The main objective of this pilot study, conducted in June 2015 in the Can Gio Mangrove Biosphere Reserve (Can Gio MBR, Viet Nam), was to develop an interdisciplinary approach to assess some key services provided by reforested mangroves subject to external pressures and varying management policies. We focused on the abundance of viruses, bacteria, endo-and epi-and macrofauna and the diversity of crabs in the mangrove and the exploitation of its resources. The main social finding was that the local inhabitants are aware of the levels of protection of the different zones within the Can Gio MBR and respect them. The core and the buffer zones seem to present a similar ecological status. Genotyping showed a low level of crab diversity although there were many...
Tipo: Text
Palavras-chave: Mangrove; Ecosystem services; Biodiversity; Local knowledge; Coastal environment; Interdisciplinary framework.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00417/52852/74762.pdf

The Investigation of Volatile and Semi-volatile Organic Contaminations in Houjing River, Kaohsiung City, Southern Taiwan
Provedor de dados: 5
Autores: Lin, Chitsan; Vu, Thanh; Senoro, Delia; Villanueva, Ching-maria.
Having long been a victim of organic contamination, Houjing River (Kaohsiung City, Southern Taiwan) has been a subject of interest to both citizens and the city government. In fact, along with progressively negative concerns from local residents, the city government has tried to identify the contamination sources and mitigate adverse effects on human health and the well-being of local residents who have dwelled along the river for decades. In this study, related industrial plants that were specific contamination sourceshave been identified after a series of samplings and analyses. Water and sediment samples were analysed employing Gas Chromatography and Mass Spectrometry (GC-MS) techniques. The analytical results were then used to discuss the impact of...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00386/49705/50231.pdf

Depuration centre management. Course notes
Provedor de dados: 5
Autores: O'Carroll, Terence; Boulter, Mark; Seaver, Mary; Masson, Daniel; O'Driscoll, Michael; Roden, Cillian.
The purpose of this course is to train and familiarise people, who are going to build, have just built or are about to modernise a purification plant, in the latest technology available to the industry and also to train people so that they can effectively run a depuration centre.  ln general the course aims to :  - Give participants practical experience of different systems prior to committing themselves to a particular system.  - Enable participants to compare systems.  - Provide a minimum training qualification to run an establishment which is essentially a facility to guarantee health and safety of products to the consumer.  - Provide an overview from bacteria testing to plant lay out etc.  The structure of the course is in modules, morning and...
Tipo: Text
Palavras-chave: Shellfish depuration; Purification; Bacteria; Viruses.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00140/25082/23192.pdf

Useful data set for the understanding of the ownership structure of the fishing firms at French and EU level
Provedor de dados: 5
Autores: Guyader, Olivier.
A widely held perception is that the European Union (EU) fishing fleet is owned by a multitude of individual owners. However, information on acquisitions of EU fishing companies by companies from other Member States or third countries (outside the EU) shows that this perception is a simplification of a more complex reality, which can be characterized by companies owning several vessels, through vertical integration phenomena by companies located downstream of the sector or the purchase of investment funds. Research on this subject is limited and the objective of this document is to identify the databases that can be used  to quantify and qualify ownership structures both in bottom-up approaches starting from ships and top-down approaches starting from the...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00681/79304/81809.pdf

Extended deep equatorial layering as a possible imprint of inertial instability
Provedor de dados: 5
Autores: D'Orgeville, Marc; Hua, Bach-lien; Schopp, Richard; Bunge, L.
The deep equatorial track of the world ocean is subject to intense zonal flow fields that still remain to be better understood. Inertial instability has been invoked to explain some of its features. Here we present possible in situ imprints of such a mechanism in the equatorial Atlantic Ocean below the thermocline. We analyse the observed pattern of homogeneous density layers of 50 - 100 m vertical scale, which are characterized by a large meridional coherency up to 2degrees of latitude, a concentration in the vicinity of the equator and foremost a vertical localization within regions of well-mixed angular momentum ( westward jets). These distinctive properties suggest inertial instability to be a plausible mechanism for this extended layering. Numerical...
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00000/10892/9229.pdf

Hatchery-scale trials using cryopreserved spermatozoa of black-lip pearl oyster, Pinctada margaritifera
Provedor de dados: 5
Autores: Hui, Belinda; Vonau, Vincent; Moriceau, Jacques; Tetumu, Roger; Vanaa, Vincent; Demoy-schneider, Marina; Suquet, Marc; Le Moullac, Gilles.
Cryopreservation is a valuable tool for genetic improvement programs. Several bivalve mollusc species have already been the subject of such programs and the Tahitian black pearl oyster industry is now planning the development of selective breeding for desirable traits in Pinctada margaritifera. The ability to cryopreserve spermatozoa would, therefore, offer significant benefits to the cultured black pearl industry.  Spermatozoa were cryopreserved with CPA 0.7 M trehalose in 0.8 M Me2SO and a two-step freezing process was used: straws were first maintained in nitrogen vapour for 10 minutes, then directly plunged into liquid nitrogen and stored for one week before use. The viability of thawed sperm was 23 % lower than that of fresh sperm. When using thawed...
Tipo: Text
Palavras-chave: Cryopreservation; Spermatozoa; Fertility; Larval rearing; Pearl oyster; Pinctada margaritifera.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00040/15098/12446.pdf

From forager tracks to prey distributions: an application to tuna vessel monitoring systems (VMS)
Provedor de dados: 5
Autores: Walker, Emily; Rivoirard, Jacques; Gaspar, Philippe; Bez, Nicolas.
In the open ocean, movements of migratory fish populations are typically surveyed using tagging methods that are subject to low sample sizes for archive tags, except for a few notable examples, and poor temporal resolution for conventional tags. Alternatively, one can infer patterns of movement of migratory fish by tracking movements of their predators, i.e., fishing vessels, whose navigational systems (e.g., GPS) provide accurate and frequent VMS (vessel monitoring system) records of movement in pursuit of prey. In this paper, we develop a state-space model that infers the foraging activities of fishing vessels from their tracks. Second, we link foraging activities to probabilities of tuna presence. Finally, using multivariate geostatistical interpolation...
Tipo: Text
Palavras-chave: GPS; Multivariate geostatistics; Presence index; Spatiotemporal distribution; Trajectometry; Tropical tuna; Vessel monitoring system (VMS).
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00610/72249/71048.pdf

Oceanic Circulation in the Strait of Gibraltar revealed by AIS data Information
Provedor de dados: 5
Autores: Le Goff, C; Mironov, As; Boussidi, B; Bordois, L; Dumas, F; Chapron, Bertrand.
Our understanding of ocean circulation to date still bears many unanswered questions. Despite the development of a variety of methods for observing upper ocean current velocity at different scales, our knowledge of this subject has yet to be significantly improved. Historically, the drift of vessels led to the discovery of the oceanic surface current. The Automatic Identification System (AIS), originally intended to avoid collision in maritime traffic, contains the necessary information to retrieve vessel drift due to the surface current. Thus, the AIS data can be processed to derive sea-surface current components for any region in which there is maritime traffic. A dedicated inversion scheme has recently been theoretically formulated and implemented. In...
Tipo: Text
Palavras-chave: AIS; Oceanic Surface Current; Drift speed; Tides.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00693/80508/83719.pdf

Caractérisation de la virulence d'une souche de Vibrio aestuarianus, pathogène de l'huître Crassostrea gigas
Provedor de dados: 5
Autores: Labreuche, Yannick.
In France. shellfish production is a traditional. well-established industry. mainly based upon commercial farming of the Pacifie oyster. Crassostrea gigas. Since the 1980's, annual mass mortalities of C. gigas have been reported during summer. Several studies on this subject have demonstrated that these mortality outbreaks resulted from complex interactions between the physiologieal andJor genetic status of the oysters. environmental factors, and one or more infectious agents, among which are bacteria of the genus Vibrio.
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Bactéries; Vibrio aestuarlanus; Pathogénicité; Produits extracellulaires; Métalloprotéase; Hémocytes; Interactions hôte/pathogène; Oyster; Crassostrea gigas; Bacteria; Vibrio aestuarianus; Pathogenicity; Extracellular products; Metalloprotease; Hemocytes; Host/pathogen interactions.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00034/14561/11859.pdf

Perception of natural habitat changes of West African marine protected areas
Provedor de dados: 5
Autores: Failler, Pierre; Touron-gardic, Gregoire; Sadio, Oumar; Traore, Marie-suzanne.
The evolution of marine protected areas (MPAs) in West Africa is reviewed through a survey of managers' perception carried on between 2017 and 2018 for the establishment of the baseline of MPAs of the Network of Marine Protected Areas of West Africa (RAMPAO). Managers report that all natural habitats are subject to surface area losses. The most affected habitats were beaches, mudflats and estuarine channels, caused by erosion and rainfall deficit. Seagrasses, rocky bottoms and coral reefs also seem to be affected, but as they are not monitored and as the managers' knowledge is poor toward these habitats, changes are not properly recorded. Despite some damages, coastal forests seem to be the only natural habitat that see positive changes, mainly due to...
Tipo: Text
Palavras-chave: Environmental change; Marine Protected Areas (MPAs); Manager perception; Satellite images; Habitats changes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00657/76866/78194.pdf

Innovations and technical-economic aspects of structural and non-structural applications of composite materials on large passenger vessels and merchant ships.
Provedor de dados: 5
Autores: Maccari, A; Farolfi, F.
Considerable interest is presently being shown in research, design and practical application of composite materials within Fincantieri Merchant Shipbuilding Division. This paper is intended to discuss the state-of-the-art and the innovations in hull, outfitting and accommodation applications, where traditional steel or light alloy can be successfully replaced by composites. The impact on design and production is outlined, with an overview of the economic effects of these materials on technology, production and safety requirements, which remain an open subject for the future possible developments.
Tipo: Text
Palavras-chave: Safety devices; Accommodation; Ship technology; Ship design; Ship hulls; Composite materials; Economie; Sécurité; Cabine; Equipement; Coque; Matériau composite.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1053.pdf

Links between patterns of marine growth and survival of Atlantic salmon Salmo salar, L.
Provedor de dados: 5
Autores: Peyronnet, Arnaud; Friedland, K; Maoileidigh, N. Ó; Manning, M; Poole, Marine Institute.
The hypothesis that marine survival of Atlantic salmon Salmo Salar is linked to marine growth was explored by using inter-circuli distances and total numbers of circuli existing on scales from a population monitored over nearly four decades. The results suggest that marine growth controls survival, particularly during the late summer and early winter of the first year at sea. Recruitment is strongly linked to growth, described as the total number of circuli, but not to inter-circuli distances. This highlights the potential of patterns of circuli number to be considered as proxies for growth. Indications that hatchery populations might be subject to other mortality events, in addition to those experienced by wild populations, are also presented. (C) 2007...
Tipo: Text
Palavras-chave: Survival; Post smolt; Growth; Circuli; Atlantic salmon.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3230.pdf

Characterization of sea water ageing effects on mechanical properties of carbon/epoxy composites for tidal turbine blades
Provedor de dados: 5
Autores: Tual, Nicolas; Carrere, N.; Davies, Peter; Bonnemains, T.; Lolive, E.
In recent years, many tidal turbine projects have been developed using composites blades. Tidal turbine blades are subject to ocean forces and sea water aggressions, and the reliability of these components is crucial to the profitability of ocean energy recovery systems. The majority of tidal turbine developers have preferred carbon/epoxy blades, so there is a need to understand how prolonged immersion in the ocean affects these composites. In this study the long term behaviour of different carbon/epoxy composites has been studied using accelerated ageing tests. A significant reduction of composite strengths has been observed after saturation of water in the material. For longer immersions only small further changes in these properties occur. No...
Tipo: Text
Palavras-chave: Carbon; Seawater ageing; Diffusion; Mechanical testing.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00278/38964/37504.pdf

The 2013 Annual Economic Report on the EU Fishing Fleet (STECF 13-15)
Provedor de dados: 5
Autores: Scientific, Technical and Economic Committee for Fisheries (STECF).
The 2013 Annual Economic Report (AER) on the European Union (EU) fishing fleet provides a comprehensive overview of the latest information available on the structure and economic performance of EU Member States fishing fleets. The Results on the economic performance indicate that the EU fishing fleet was again in profitable in 2011, with 6% of income being retained as net profit. On the whole, the EU fleet showed improvements in most of the main economic performance indicators analysed when compared to 2010. Yet, in view of the uncertain economic climate and rising fuel prices, the economic performance of the EU fleet in the near future is unclear. Projections for 2012 indicate increased income for over threefifths of the fleets analysed but positive...
Tipo: Text
Palavras-chave: Fishing fleet; Fishing statistics; Economic analysis; Community fisheries; Common fisheries policy; Annual report; Research report.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00168/27902/26174.pdf

Orbital controls on Namib Desert hydroclimate over the past 50,000 years
Provedor de dados: 5
Autores: Chase, Brian M.; Niedermeyer, Eva M.; Boom, Arnoud; Carr, Andrew S.; Chevalier, Manuel; He, Feng; Meadows, Michael E.; Ogle, Neil; Reimer, Paula J.
Despite being one of the world’s oldest deserts, and the subject of decades of research, evidence of past climate change in the Namib Desert is extremely limited. As such, there is significant debate regarding the nature and drivers of climate change in the low-latitude drylands of southwestern Africa. Here we present data from stratified accumulations of rock hyrax urine that provide the first continuous highresolution terrestrial climate record for the Namib Desert spanning the past 50,000 yr. These data, spanning multiple sites, show remarkably coherent variability that is clearly linked to orbital cycles and the evolution and perturbation of global boundary conditions. Contrary to some previous predictions of southwestern African climate change, we...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00508/61987/66098.pdf

Osmoregulation, bioenergetics and oxidative stress in coastal marine invertebrates: raising the questions for future research
Provedor de dados: 5
Autores: Rivera-ingraham, Georgina A.; Lignot, Jehan-herve.
Osmoregulation is by no means an energetically cheap process, and its costs have been extensively quantified in terms of respiration and aerobic metabolism. Common products of mitochondrial activity are reactive oxygen and nitrogen species, which may cause oxidative stress by degrading key cell components, while playing essential roles in cell homeostasis. Given the delicate equilibrium between pro- and antioxidants in fueling acclimation responses, the need for a thorough understanding of the relationship between salinity-induced oxidative stress and osmoregulation arises as an important issue, especially in the context of global changes and anthropogenic impacts on coastal habitats. This is especially urgent for intertidal/estuarine organisms, which may...
Tipo: Text
Palavras-chave: Hyper-/hypo-osmoregulator; Hyper-/iso-osmoregulators; Osmoconformers; Antioxidants; Free radicals; Hypometabolism; Mitochondria.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00625/73717/74820.pdf

Biological sampling of non-quota species.
Provedor de dados: 5
Autores: Dunn, M. R.; Rogers, S. I.; Morizur, Yvon; Tetard, Alain; Aublet, B; Le Niliot, Ph; Miossec, Dominique.
The objective of this study was to develop an effective biological sampling programme for fish species in the English Channel (ICES Divisions Vild and Vile) which are not subject to quota management, and to prepare these data for use in multispecies, multi-fleet models being developed by the Channel Fisheries Study Group. Length and age data were coIlected for six non-quota species, and length data for a further five species. The samples were coIlected over a period of two years from important ports on the French and UK coasts. The exploitation patterns of each species were described by allocating catches from similar catching gears, regions, seasons and target species into common units referred to as métiers. The most important métiers in terms of landed...
Tipo: Text
Palavras-chave: Biological sampling; Commercial species; Exploitation; Fishery management.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00304/41514/40722.pdf

MEDITS. International bottom trawl survey in the Mediterranean. Instruction manual. Version 6
Provedor de dados: 5
Autores: MEDITS working group.
This document is the sixth version of a manual elaborated in the frame of an international project to harmonise sampling of demersal resources in the Mediterranean Sea, through the MEDITS trawl survey. It is the reference document for research institutes contributing to the MEDITS surveys on the continental shelves and slopes in the Mediterranean (Fig. 1), for the 2012 surveys and onwards. The manual describes the sampling gear characteristics, the sampling methodology and the processing of samples. Finally, it gives the specifications of the data files for data storage and exchange. This manual includes amendments and improvements to the MEDITS protocol as agreed by the MEDITS Co-ordination Committee up to the 2012 annual meeting. Considering the need for...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22783/20585.pdf

Seismic imaging of the ocean internal structure: A new tool in physical oceanography?
Provedor de dados: 5
Autores: Géli, Louis; Savoye, Bruno; Carton, Xavier; Stephan, Manuel.
Reflection seismics has been intensively used for the last four decades by marine geologists and geophysicists for imaging Earth structures below the seafloor. Because their subject of interest is below the sea bottom, solid Earth scientists do not usually consider the seismic signal propagating in the water column and most often do not even record it, in order to save data storage space. Two physical oceanographers, Gonella and Michon [1988],first reported internal waves revealed by reflection seismics in the northeastern Atlantic. Only recently, though, has the scientific community realized the importance of this issue, after Holbrook et al. [2003] published reflection seismic sections of the water column off Newfoundland, Canada, showing reflectors...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00451/56259/57828.pdf

Polystyrene microbeads modulate the energy metabolism of the marine diatom Chaetoceros neogracile
Provedor de dados: 5
Autores: Seoane, Marta; González-fernández, Carmen; Soudant, Philippe; Huvet, Arnaud; Esperanza, Marta; Cid, Ángeles; Paul-pont, Ika.
Due to the growing concern about the presence of microplastics (MP) in the environment, the number of studies evaluating the toxicity of these small persistent particles on different marine species has increased in recent years. Few studies have addressed their impact on marine phytoplankton, a subject of great concern since they are primary producers of the aquatic food web. The aim of this study is to unravel the cytotoxicity of 2.5 μg mL−1 unlabelled amino-modified polystyrene beads of different sizes (0.5 and 2 μm) on the marine diatom Chaetoceros neogracile. In addition to traditional growth and photosynthesis endpoints, several physiological and biochemical parameters were monitored every 24 h in C. neogracile cells by flow cytometry during their...
Tipo: Text
Palavras-chave: Microalgae; Microplastic; Flow cytometry; Cytotoxicity; Scanning electron microscopy.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00492/60415/63850.pdf

Suitability of a lumped rainfall–runoff model for flashy tropical watersheds in New Caledonia
Provedor de dados: 5
Autores: Desclaux, Terence; Lemonnier, Hugues; Genthon, Pierre; Soulard, Benoit; Le Gendre, Romain.
The GR4H lumped hourly rainfall–runoff model was assessed for its integration in a ridge-to-reef modelling framework. Particular attention was paid to rainfall representation, robustness of parameter estimates and ability to reproduce main runoff features. The study was conducted in four tropical mountainous watersheds in New Caledonia, exposed to intense rainfall events, large annual climatic variations triggered by El Niño oscillation, and wildfires. The inverse distance and elevation weighting algorithm outperformed other classical rainfall interpolation methods under data-limited conditions. The time-span of data needed for robust calibration was site-specific and varied from 6–7 years to 10 years, which may be linked to El Niño events and to...
Tipo: Text
Palavras-chave: Hydrological model; Ridge-to-reef; GR4H; Rainfall-runoff model; Integrated modelling; New Caledonia; Lagoon; Wildfire.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56681/58466.pdf

Three years of experimental and applied research on the use of dietary probiotic Pediococcus acidilactici in shrimp culture : overview of the main results
Provedor de dados: 5
Autores: Castex, Mathieu; Chim, Liet; Lemaire, Pierrette; Wabete, Nelly.
In recent years the biological control of diseases by environmental friendly methods such as probiotics has become an important subject of investigation in aquaculture research. Probiotics are live microorganisms which when administrated in adequate amounts confer a health benefit on the host . In the last 4 years, IFREMER in collaboration with Lallemand company, have carried out researchs in New Caledonia with the aim to assess the probiotic strain P. acidilactici MA 18/5M on farmed shrimp Litopenaeus stylirostris.This project started in 2005 demonstrated the beneficial effects of the probiotic Pediococcus acidilactici dietary supplementation on the nutrition and the health status of peneid shrimps and highlighted that its use as probiotic can be part of...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00197/30873/29241.pdf

Biomass and production of two Halimeda species in the southwest new caledonian lagoon
Provedor de dados: 5
Autores: Garrigue, C.
Two algal communities on unconsolidated sand, dominated by two Caulerpa populations, were studied in the southwestern New Caledonian lagoon. Biomass, growth rates and production were measured at two stations over one year. Biomass and growth rate of Halimeda were estimated monthly by counting the number of new and lost segments on tagged plants and by weighing them. Production was assessed monthly by comparing two successive measurements. The average rates measured were 0.60 s f-1 d-1 (segment frond-1 day-1 ) for Halimeda incrassata and 0. 15 s f-1 d-1 for H. discoidea. Production in terms of organic carbon amounted to 3.79 g m-2 y-1 for H. incrassata and 3.37 g m-2 y-1 for H. discoidea. The production of H. discoidea population is subject to seasonal...
Tipo: Text
Palavras-chave: HALIMEDA; PRODUCTION; PHYTOBENTHOS; NEW-CALEDONIA; BIOMASS.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00102/21277/18886.pdf

Rogue Waves 2008 : Proceedings of a Workshop organized by Ifremer and held in Brest, France 13-14-15 October 2008 within the Brest Sea Tech Week 2008
Provedor de dados: 5
Autores: Olagnon, Michel; Prevosto, Marc.
Since the Rogue Waves 2000 and 2004 workshops, researchers have pursued activity in the proposition of models and descriptions that can improve our understanding of rogue waves. The Brest Rogue Waves 2008 workshop gathered again many scientists and engineers to an opportunity to confront and discuss their views on the subject. It provided an assessment of the State of the Art of research on those matters, and was one more step forward towards efficient mitigation measures.
Tipo: Text
Palavras-chave: Face au risque de ces événements. Mots-clés : vagues; Extrêmes; Vagues anormales; Vagues scélérates; Ocean waves; Extremes; Rogue waves; Freak waves.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00133/24444/22459.pdf

Structure et organisation de l'étang de Thau d'après la faune benthique (macrofaune, méiofaune). Relations avec le confinement
Provedor de dados: 5
Autores: Guelorget, O; Perthuisot, Jp; Lamy, N; Lefebvre, A.
The biogeological organization of Thau lagoon was investigated through the granulometric analysis of surficial sediments and study of the qualitative and the quantitative distribution of benthic macrofauna and meiofauna. These show clearly that the lagoonal system is organized according to confinement as conceived by Guelorget and Perthuisot (1983 a; 1992), which depends upon the rate of exchanges with the open sea and the hydrodynamic pattern of the basin. The latter appears to be composed of a pair of lagoonal subsystems separated by a hydrodynamically unstable barrier. The northern subsystem displays the classical concentric organization of Mediterranean lagoons with a clearly defined hydraulic umbilicus. The southern subsystem displays a transverse...
Tipo: Text
Palavras-chave: LAGOON; MACROZOOBENTHOS; MEIOBENTHOS; CONFINEMENT; MEDITERRANEAN.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00098/20880/18494.pdf

Pyrenean orogeny and plate kinematics - art. no. B08104
Provedor de dados: 5
Autores: Sibuet, Jean-claude; Srivastava, Sp; Spakman, W.
The evolution of the Pyrenees, a mountain range between Iberia and Eurasia, has remained the subject of many debates between geologists and geophysicists for a long time. By combining the identification of seafloor spreading anomalies A33o to M0 in the Bay of Biscay with those in the North Atlantic, we have derived a position of a mean pole of rotation for the entire opening of the Bay of Biscay. Four hundred kilometers of shortening took place between the Iberian and Eurasian plates in the Pyrenean domain during the opening of the Bay of Biscay, from chrons M0 to A33o time (118 to 80 Ma). The deep seismic Etude Continentale et Oceanique par Reflexion et refraction Sismique (ECORS) profile shot across the Pyrenees and teleseismic data show the presence of...
Tipo: Text
Palavras-chave: Pyrenean evolution; Kinematics; Seismic data; Tomography.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00000/10837/7748.pdf

Evolution of the northeast Labrador Sea during the last interglaciation
Provedor de dados: 5
Autores: Winsor, Kelsey; Carlson, Anders E.; Klinkhammer, Gary P.; Stoner, Joseph S.; Hatfield, Robert G.
Boreal summer insolation during the last interglaciation (LIG) generally warmed the subpolar to polar Northern Hemisphere more than during the early Holocene, yet regional climate variations between the two periods remain. We investigate northeast Labrador Sea subsurface temperature and hydrography across terminations (T) I and II and during the LIG to assess the impact of two different magnitudes of boreal summer insolation increase on the northeast Labrador Sea. We use Mg/Ca ratios in Neogloboquadrina pachyderma (sinistral) as a proxy of calcification temperature to document changes in subsurface temperatures over Eirik Drift. Our corresponding record of delta O-18 of seawater documents changes in water mass salinity. Mg/Ca calcification temperatures...
Tipo: Text
Palavras-chave: Neogloboquadrina pachyderma (sinistral); Labrador Sea; Mg/Ca; Deglaciations; Interglaciations; Subpolar gyre.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00265/37604/36840.pdf

Vortex Interactions Subjected to Deformation Flows: A Review
Provedor de dados: 5
Autores: Koshel, Konstantin V.; Ryzhov, Eugene A.; Carton, Xavier.
Deformation flows are the flows incorporating shear, strain and rotational components. These flows are ubiquitous in the geophysical flows, such as the ocean and atmosphere. They appear near almost any salience, such as isolated coherent structures (vortices and jets) and various fixed obstacles (submerged obstacles and continental boundaries). Fluid structures subject to such deformation flows may exhibit drastic changes in motion. In this review paper, we focus on the motion of a small number of coherent vortices embedded in deformation flows. Problems involving isolated one and two vortices are addressed. When considering a single-vortex problem, the main focus is on the evolution of the vortex boundary and its influence on the passive scalar motion....
Tipo: Text
Palavras-chave: Shear flow; Deformation flow; Point vortex; Elliptic vortex; Chaotic dynamics; Parametric instability; Stability islands.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00600/71243/69613.pdf

Report of the Workshop on Guidelines for Management Strategy Evaluations (WKGMSE). 21 - 23 January 2013, ICES HQ, Copenhagen, Denmark
Provedor de dados: 5
Autores: ICES.
The Workshop on Guidelines for Management Strategy Evaluations (WKGMSE) met 21-23 January in Copenhagen Denmark, The meeting was chaired by Dankert Skagen and John Simmonds, with 19 participants from 10 nations. The purpose of the meeting was to review and bring up to date the methodologies and tech-nical specifications that should be incorporated in MSE. The workshop also considered appro-priate risk definitions for MSE, taking into account practices in ICES and elsewhere and developed an updated set of guidelines for MSE evaluations in ICES. In order to review the methodologies and standards used in the past a summary template was prepared and circulated to participants. Eighteen MSEs were summarised using the template and reviewed at the workshop, these...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00166/27686/25879.pdf

A comparative analysis of métiers and catch profiles for some French demersal and pelagic fleets
Provedor de dados: 5
Autores: Marchal, Paul.
A quantitative comparison between metiers and resulting catch profiles was carried out for seven French demersal and pelagic fleets operating in the North Sea, the eastern Channel, and the Bay of Biscay. Typologies for four metiers have been attempted, based on different factors (gear, mesh size, fishing ground, and/or a priori target species), data sources (logbooks or harbour enquiries), and aggregation levels. Catch profiles were selected through cluster analysis. The linkage between metiers and catch profiles was quantified using uncertainty coefficients, which depended on the metier typology being used and the fleet under consideration, but were not subject to substantial inter- or intra-annual fluctuations. Future catch profiles and metiers were...
Tipo: Text
Palavras-chave: Uncertainty coefficients; Metiers; Fleets; Fishing intention; Catch profiles.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4075.pdf

Despite great expectations in the Seine River Basin, the WFD did not reduce diffuse pollution
Provedor de dados: 5
Autores: Bouleau, Gabrielle; Barbier, Rémy; Halm-lemeille, Marie-pierre; Tassin, Bruno; Buchs, Arnaud; Habets, Florence.
European stakeholders engaged in combatting the eutrophication of the North Sea welcomed three Water Framework Directive innovations: a more holistic approach to quality, the binding nature of WFD objectives, and greater public participation. Twenty years later, however, there has been a disappointing amount of progress in the reduction of diffuse pollution. In the Seine River Basin, the amount of livestock rearing is low; yet the basin is subject to significant diffuse pollution due to agriculture. This paper reports our study of this case; we examine the literature on WFD implementation policy in order to identify the physical and social causes of this failure to reduce diffuse pollution. We show that the nitrates, phosphorus, and pesticides that affect...
Tipo: Text
Palavras-chave: Diffuse pollution; Policy implementation; Output legitimacy; Regulatory space; Intensive agriculture; WFD; Seine River Basin; France.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00645/75668/76535.pdf

Are shallow-water shrimps proxies for hydrothermal-vent shrimps to assess the impact of deep-sea mining?
Provedor de dados: 5
Autores: Mestre, N.c.; Auguste, M.; De Sá, L.c.; Fonseca, T.g.; Cardoso, C.; Brown, A.; Barthelemy, D.; Charlemagne, N.; Hauton, C.; Machon, J.; Ravaux, J.; Shillito, B.; Thatje, S.; Bebianno, M.j.
Polymetallic seafloor massive sulphide deposits are potential targets for deep-sea mining, but high concentrations of metals (including copper - Cu) may be released during exploitation activities, potentially inducing harmful impact. To determine whether shallow-water shrimp are suitable ecotoxicological proxies for deep-sea hydrothermal vent shrimp the effects of waterborne Cu exposure (3 and 10 days at 0.4 and 4 μM concentrations) in Palaemon elegans, Palaemon serratus, and Palaemon varians were compared with Mirocaris fortunata. Accumulation of Cu and a set of biomarkers were analysed. Results show different responses among congeneric species indicating that it is not appropriate to use shallow-water shrimps as ecotoxicological proxies for deep-water...
Tipo: Text
Palavras-chave: Deep-sea mining; Ecotoxicology; Biomarkers; Mirocaris fortunata; Palaemon.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62070/83483.pdf

Long-term changes of seagrass beds in the Glenan Archipelago (South Brittany)
Provedor de dados: 5
Autores: Glemarec, M; Lefaou, Y; Cuq, F.
Aerial photographs and in situ data of the Glenan archipelago permit the establishment of a cartography of its Zostera marina seagrass beds. Due to the exceptionally clear water, it was possible to distinguish submerged structures, such as rocks, sand dunes, maerl beds and seagrass meadows on the photographs. The distribution of Zostera meadows was incorporated into a geographical information database through scanning, and then compared with historical data. Ten aerial photographic surveys, made over a sixty-year period from 1932 to 1992 were available. The earliest of these surveys showed the seagrass beds to be in goad condition. Low cover in 1952 suggests that the Zostera meadows within the studied area were subject to severe destructions, presumably...
Tipo: Text
Palavras-chave: Zostera beds; Climatic fluctuations; Ecological amplification.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20392/18059.pdf

Deglacial development of (sub) sea surface temperature and salinity in the subarctic northwest Pacific: Implications for upper-ocean stratification
Provedor de dados: 5
Autores: Riethdorf, Jan-rainer; Max, Lars; Nuernberg, Dirk; Lembke-jene, Lester; Tiedemann, Ralf.
Based on models and proxy data, it has been proposed that salinity-driven stratification weakened in the subarctic North Pacific during the last deglaciation, which potentially contributed to the deglacial rise in atmospheric carbon dioxide. We present high-resolution subsurface temperature (T-Mg/Ca) and subsurface salinity-approximating (delta O-18(ivc-sw)) records across the last 20,000 years from the subarctic North Pacific and its marginal seas, derived from combined stable oxygen isotopes and Mg/Ca ratios of the planktonic foraminiferal species Neogloboquadrina pachyderma (sin.). Our results indicate regionally differing changes of subsurface conditions. During the Heinrich Stadial 1 and the Younger Dryas cold phases, our sites were subject to reduced...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00262/37307/35719.pdf

Capacity and scale inefficiency: Application of data envelopment analysis in the case of the french seaweed fleet
Provedor de dados: 5
Autores: Guyader, Olivier; Daures, Fabienne.
Data Envelopment Analysis (DEA) models are applied to the main French seaweed fleet to examine capacity output, capacity utilization, and scale inefficiency. Coastal seaweed vessels target only one output - kelp - with the same gear but with different input level combinations. The fishery is seasonal and subject mainly to input regulations, especially a one trip per day regulation implemented in 1987. The consequence was a decline in total observed output and a fall in capacity output and efficient output. Only the largest vessels and a few small vessels harvesting without this regulatory constraint operate at the optimal scale. The question of a change in regulation, especially a shift to an individual quota system, is raised.
Tipo: Text
Palavras-chave: Data Envelopment Analysis; Capacity; Capacity utilization; Scale in- efficiency; Production frontier; Seaweed; Fleet.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00243/35439/33968.pdf

Fish, fishers, seals and tourists: Economic consequences of creating a marine reserve in a multi-species, multi-activity context
Provedor de dados: 5
Autores: Boncoeur, Jean; Alban, Frederique; Guyader, Olivier; Thebaud, Olivier.
This paper investigates some economic consequences of creating a marine reserve on both fishing and ecotourism, when the range of controllability of fishing effort is limited and the impact of the reserve on ecosystem is considered. The issue is illustrated by the example of creating a no-take zone in part of a region where fishing is managed through a limited entry license system, and which is inhabited by two interacting stocks: a stock of prey (fish) and a stock of predators (seals). While the former is targeted by commercial fishing, the latter is not subject to harvest but is a potential basis for a commercial non-extractive activity (seal watching). Analysis is conducted with the help of a bioeconomic model combining the features of marine reserve...
Tipo: Text
Palavras-chave: Marine protected areas; Multispecies interactions; Ecotourism; Bioeconomic modeling.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00244/35506/34010.pdf

Forward modeling for marine sediment characterization using chirp sonars
Provedor de dados: 5
Autores: Rakotonarivo, Sandrine; Legris, Michel; Desmare, Rozenn; Sessarego, Jean-pierre; Bourillet, Jean-francois.
This paper investigates the forward modeling of chirp-sonar data for the quantitative characterization of marine subbottom sediment between 1 and 10 kHz. The forward modeling, based on a transfer function approach, included impacts of layering or impedance mismatch, attenuation, roughness, and transitional layers, i.e., continuous impedance variations. The presented approach provided the best compromise between the number of available geoacoustic parameters from chirp-sonar data and the subbottom modeling accuracy. The forward model was tested on deep-sea chirp-sonar data acquired at a central frequency of 3.5 kHz. Comparisons between synthetic and experimental seismograms showed good agreement for the first 15 m of buried layers. Performance of the...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00039/15053/12380.pdf

Conditions estivales dans la divergence de Méditerrannée nord-occidentale-II-macroplancton et micronecton-étude qualitative et estimation quantitative des cnidaires et des euphausiacés
Provedor de dados: 5
Autores: Goy, J; Thiriot, A.
A summer cruise in the north-western Mediterranean was devoted to the study of biological production and ecological characteristics of the upper waters in the divergence area. Macroplankton and micronekton,which are the subject of particular attention, consist mainly of Cnidaria and Euphausiids respectively, and are very abundant in summer; one may thus espect them to play a significant role in the trophic re1ationships of the ecosystem. They are both studied here under their qualitative and quantitative aspects, in connection with the three hydrologically distinct regions which were covered during the cruise. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-5170.pdf

Influence of spatial scales of observation on temporal change in diversity and trophic structure of fine-sand communities from the English Channel and the southern North Sea
Provedor de dados: 5
Autores: Ghertsos, K; Luczak, C; Dewarumez, Jm; Dauvin, Jc.
Along the coast of France in the English Channel, muddy fine-sand communities are restricted to bays and estuaries, but in the southern North Sea they stretch out to larger areas (mesoscale continuum). We studied three regions containing these communities, each subject to different hydrological conditions and contrasting trophic structures of the water column. The Bay of Morlaix was strongly affected by the "Amoco Cadiz" oil spill of 1978 and recovered slowly. The Bay of Seine is influenced by high levels of nutrient input from the River Seine. A retention structure exists in the eastern part ensuring recruitment stability. The Gravelines area in the southern North Sea was invaded by the American jackknife clam (Ensis directus), which became a key species...
Tipo: Text
Palavras-chave: Abra alba community; English Channel; Macrobenthos; North Sea; Spatial scales of observation; Temporal change.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00464/57583/59810.pdf

Geophysical flows under location uncertainty, Part III SQG and frontal dynamics under strong turbulence conditions
Provedor de dados: 5
Autores: Resseguier, Valentin; Memin, E.; Chapron, Bertrand.
Models under location uncertainty are derived assuming that a component of the velocity is uncorrelated in time. The material derivative is accordingly modified to include an advection correction, inhomogeneous and anisotropic diffusion terms and a multiplicative noise contribution. This change can be consistently applied to all fluid dynamics evolution laws. This paper continues to explore benefits of this framework and consequences of specific scaling assumptions. Starting from a Boussinesq model under location uncertainty, a model is developed to describe a mesoscale flow subject to a strong underlying submesoscale activity. Specifically, turbulent diffusion and rotation effects have similar orders of magnitude. As obtained, the geostrophic balance is...
Tipo: Text
Palavras-chave: Stochastic subgrid tensor; Uncertainty quantification; Upper ocean dynamics.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00385/49600/51088.pdf

Dynamics of an Equatorial River Plume: Theory and Numerical Experiments Applied to the Congo Plume Case
Provedor de dados: 5
Autores: Vic, Clement; Berger, Henrick; Treguier, Anne-marie; Couvelard, Xavier.
The Congo River has the second largest rate of flow in the world and is mainly responsible for the broad tongue of low-salinity water that is observed in the Gulf of Guinea. Despite their importance, near-equatorial river plumes have not been studied as thoroughly as midlatitude plumes and their dynamics remain unclear. Using both theory and idealized numerical experiments that reproduce the major characteristics of the region, the authors have investigated the dynamics of the Congo River plume and examine its sensitivity to different forcing mechanisms. It is found that near-equatorial plumes are more likely to be surface trapped than midlatitude plumes, and the importance of the effect in describing the strong offshore extent of the low-salinity tongue...
Tipo: Text
Palavras-chave: Geographic location; Entity; Rivers; Circulation; Dynamics; Coastal flows; Density currents; Eddies; Nonlinear dynamics; Topographic effects.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00187/29850/28298.pdf

Comparison of three methods of DNA extraction from cold-smoked salmon and impact of physical treatments
Provedor de dados: 5
Autores: Giacomazzi, Sophie; Leroi, Francoise; Joffraud, Jean-jacques.
Aims: To compare three bacterial DNA extraction procedures on cold-smoked salmon (CSS) and assess the impact on their efficiency of two physical treatments of the food matrix, ionizing irradiation and freezing.   Methods and Results: As molecular methods for bacterial detection have become an important analytical tool, we compared bacterial DNA extraction procedures on CSS. Working with frozen and irradiated CSS, we obtained negative responses from samples known to be highly contaminated. Thus, we decided to study the impact of these two physical treatments on bacterial DNA extraction procedures. The efficiency of bacterial DNA extraction directly from the fish matrix suspension was measured by an rpoB PCR-based reaction. The results demonstrated that the...
Tipo: Text
Palavras-chave: RpoB gene; PCR; Ionizing irradiation; Freezing; DNA extraction; Cold smoked salmon.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1106.pdf

Molecular diversity of antimicrobial effectors in the oyster Crassostrea gigas
Provedor de dados: 5
Autores: Schmitt, Paulina; Gueguen, Yannick; Desmarais, Erick; Bachere, Evelyne; De Lorgeril, Julien.
Background: To gain insight into the molecular diversity of antimicrobial peptides and proteins in the oyster Crassostrea gigas, we characterized and compared the sequence polymorphism of the antimicrobial peptides (AMPs), Cg-Defensins (Cg-Defs) and Cg-Proline Rich peptide (Cg-Prp), and of the bactericidal permeability increasing protein, Cg-BPI. For that, we analyzed genomic and transcript sequences obtained by specific PCR amplification and in silico searches. Results: High diversification among the three antimicrobial effectors was evidenced by this polymorphism survey. On the basis of sequence phylogenies, each AMP aggregates into clearly defined groups of variants and is the product of a multigenic family displaying a variety of gene structures. In...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00001/11182/6691.pdf

Improvement of chilled seabass sperm conservation using a cell culture medium
Provedor de dados: 5
Autores: Fauvel, Christian; Boryshpolets, Sergey; Cosson, J.; Leedy, J. G. Wilson; Labbe, C.; Haffray, Pierrick; Suquet, Marc.
The sperm of seabass is very fragile and it quickly loses its ability to fertilize after collection either if kept undiluted or in classic saline media. In order to avoid cryopreservation when only short conservation is required, the process of sperm management including sperm collection, sperm dilution rate in storage medium and storage medium composition, was subject to experimental trials. A concentration of 20% urine generated a low pH of seminal fluid, and it immediately altered the motility ability. However, pH did not seem to be the key agent of motility prevention since sperm dilution in Leibovitz culture medium (L15) or in classic saline medium both presenting a similar low pH (7.3) did not affect motility. L15 increased the duration of sperm...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00111/22221/20066.pdf

The Cost of Co-viability in the Australian Northern Prawn Fishery
Provedor de dados: 5
Autores: Gourguet, Sophie; Thebaud, Olivier; Jennings, Sarah; Little, L. Richard; Dichmont, Catherine M.; Pascoe, Sean; Deng, Roy A.; Doyen, Luc.
Fisheries management must address multiple, often conflicting objectives in a highly uncertain context. In particular, while the bio-economic performance of trawl fisheries is subject to high levels of biological and economic uncertainty, the impact of trawling on broader biodiversity is also a major concern for their management. The purpose of this study is to propose an analytical framework to formally assess the trade-offs associated with balancing biological, economic and non-target species conservation objectives. We use the Australian Northern Prawn Fishery (NPF), which is one of the most valuable federally managed commercial fisheries in Australia, as a case study. We develop a stochastic co-viability assessment of the fishery under multiple...
Tipo: Text
Palavras-chave: Bio-economic modeling; Co-viability cost; Conflicting management objectives; Trawling impacts; Uncertainty; Northern prawn fishery.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41073/40295.pdf

La pêche aux thons sur la côte Basque Française et son évolution récente
Provedor de dados: 5
Autores: De La Tourrasse, Guy.
Traditional tuna fisheries in France have been described very often and in a very good manner, and it would be superfluous to write a bibliography of the works dealing with this subject. The following few pages, resulting from observations and personal studies, aim to precise the specific and new aspect of one of these fisheries. An important share of our marine economy, they are carried out in three of the four metropolitan seas, as these fishes are not found in the English Channel; hence, from a professional point of view, three major types.
Tipo: Text
Ano: 1951
URL: http://archimer.ifremer.fr/doc/1951/publication-6702.pdf

Vibrio   ‐bivalve interactions in health and disease
Provedor de dados: 5
Autores: Destoumieux‐garzón, Delphine; Canesi, Laura; Oyanedel, Daniel; Travers, Marie-agnes; Charrière, Guillaume; Pruzzo, Carla; Vezzulli, Luigi.
n the marine environment, bivalve mollusks constitute habitats for bacteria of the Vibrionaceae family. Vibrios belong to the microbiota of healthy oysters and mussels, which have the ability to concentrate bacteria in their tissues and body fluids, including the hemolymph. Remarkably, these important aquaculture species respond differently to infectious diseases. While oysters are the subject of recurrent mass mortalities at different life stages, mussels appear rather resistant to infections. Thus, Vibrio species are associated to the main diseases affecting the worldwide oyster production. Here we review the current knowledge on Vibrio‐bivalve interaction in oysters (Crassostrea sp.) and mussels (Mytilus sp.). We discuss the transient versus stable...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74032/73360.pdf

Flambement global et local des materiaux composites: Application aux mats de voiliers
Provedor de dados: 5
Autores: Devaux, H.
The mast-rigging combination of a yacht is the structural element which transmits the aerodynamic forces on the sails to the yacht's structure. This load transmission element is in general made up of a mast, a long, thin tube, and the rigging which is a collection of cables linking the mast to the deck. These elements are long, often longer than the hull, with a high centre of gravity and it is essential to obtain as low a mass as possible, both for safety and performance. This search for weight gain imposes the use of lighter and lighter materials: wood, then aluminium alloys and most recently, since the early 1980's, composite materials. The use of the latter is the subject of this paper.
Tipo: Text
Palavras-chave: Composite materials; Deformation; Ship design; Ship technology; Eléments finis; Gréement; Mât; Flambement.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1078.pdf

The Human Body Known Through the Renovated Museum of Anatomy From the Faculty of Dentistry of Ribeirão Preto
Provedor de dados: 77
Autores: Rodrigues,Giovani Antônio; Ferreira,Pedro Franco; Morando,Bianca Carrilho; Issa,João Paulo Mardegan; Iyomasa,Mamie Mizusaki.
The present work aimed to preserve anatomical specimens to improve the quality of education, prepare supporting materials, and present lectures on the anatomy of the nervous system for public school students. Anatomical specimens related to the nervous system were photographed and named, and acrylic containers filled with formaldehyde were made for the accommodation of these specimens. After research on the subject a handbook and a banner were prepared, enriching the collections of the museum along with the anatomical specimens, in addition to the lecture and video available on "iptv.usp.br ". Meetings between the students, the teachers involved, and the members of the Secretariat of Education of Ribeirao Preto defined schools, dates, times, and duration...
Tipo: Journal article
Palavras-chave: Neuroanatomy; Museum; Learning; Culture and extension.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300043

Origin, Evolution and Homologies of the Weberian Apparatus: A New Insight
Provedor de dados: 77
Autores: Diogo,Rui.
The Weberian apparatus is essentially a mechanical device improving audition, consisting of a double chain of ossicles joining the air bladder to the inner ear. Despite being one of the most notable complex systems of teleost fishes and the subject of several comparative, developmental and functional studies, there is still much controversy concerning the origin, evolution and homologies of the structures forming this apparatus. In this paper I provide a new insight on these topics, which takes into account the results of recent works on comparative anatomy, paleontology, and ontogeny as well as of a recent extensive phylogenetic analysis including not only numerous otophysan and non-otophysan extant otocephalans but also ostariophysan fossils such as...
Tipo: Journal article
Palavras-chave: Evolution; Functional anatomy; Ostariophysi; Otocephala; Otophysi; Phylogeny; Teleostei; Weberian apparatus.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200008

Implementation of a Program of Voluntary Body Donation for Anatomical Study in the University of São Paulo, Brazil
Provedor de dados: 77
Autores: Simão,Thelma Renata Parada; Miglino,Maria Angélica; da Silva,Jodonai Barbosa; McManus,Concepta; Liberti,Edson Aparecido.
Unclaimed corpses were for many years the supply of human material for the study of human anatomy. However, due to improved quality of life and technology, there has been the surround these. Faced with these circumstances, and the impossibility of total replacement of this material by others in training future professionals and the endless dissection technique, the Donation Voluntary Bodies for Anatomical Study is presented as an alternative to capture corpses or who wish to donate your body or part of it to research institutions and scientific study, without obtaining any pecuniary gain. Thus, the present study aimed to gather information about the knowledge and belief of the population of anatomists and freshmen, on the subject; obtain information on the...
Tipo: Journal article
Palavras-chave: Donation; Corpses; Dissection; Anatomy.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000400051

Morphostructural Differentiation and Variability of Merino Sheep Breed Under Sustained Directional Selection
Provedor de dados: 77
Autores: de la Barra,R; Latorre,E; Martínez,M. E; Calderón,C.
In this paper, the degree of differentiation and morphostructural variability reached by the type of animal resulting from sustained directional selection, in addition to its implications for the emergence of a new sheep breed are analyzed. Twenty-five rams and 200 ewes from a sheep flock submitted to directional selection since 1987 were measured. Thirteen body measurements were taken in other to evaluate the structural morphology and sexual dimorphism. These measurements were compared with identical measures taken in Australian Merino and Marin Magellan Meat Merino sheep breeds. The intrapopulation homogeneity was assessed using the coefficients of variation of the average percentage of body measurements. It is concluded that sustained directional...
Tipo: Journal article
Palavras-chave: Breeding; Genetics; Morphology.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300052

Cordelia's Dilemma, Historical Bias, and General Evolutionary Trends: Catfishes as a Case Study for General Discussions on Phylogeny and Macroevolution
Provedor de dados: 77
Autores: Diogo,Rui.
As noted Gould in his recent and last book «The structure of evolutionary theory», discourses on the high importance and frequency of evolutionary trends have consumed a great part of the research on the history of clades. Although aware that natural selection theoretically yields adaptation to immediate environments, many authors defend such trends as generalised improvements somehow conferring advantages across most or all experienced environments. The high importance given to evolutionary trends is questioned by Gould, who considers that such a high importance given to such evolutionary trends bears no necessary relationship to the relative frequency or casual weight of these events in evolution, but mainly to a major bias: trends tell histories, and...
Tipo: Journal article
Palavras-chave: Evolution; Morphology; Phylogeny; Siluriformes; Teleostei.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500016

CONA and UEA-I Ligands During Tooth Development Reveals Differences between Human and Rodents Models and Shows the Beginning of Mineral Extracelular Matrix Secretion
Provedor de dados: 77
Autores: Iglesias,Déborah Pitta Paraíso; Rego,Moacyr Jesus Barreto de Melo; Beltrão,Eduardo Isidoro Carneiro; Sobral,Ana Paula Veras.
Many of Glycobyological aspects of human development remain still unclear, mainly in oral science, and this could be observed in a lack of literature with few and old papers about this subject. During tooth histo-morphogenesis changes occur in basement membrane composition, expression of signaling molecules and in localization of cell surface components, where glyco components could be involved. In this sense, this work aimed to analyze the ConA ligands commonly founded in glycoproteins cores and UEA-I ligands since fucolization is a Key event in many physiological and pathological processes. Therefore 15 jaws of human fetuses were ethically obtained, histologicaly processed and then submitted to lectin histochemistry with appropriated controls. The...
Tipo: Journal article
Palavras-chave: Odontogenesis; Carbohydrates; Lectin histochemistry.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300056

Analysis of Behavior of Forces in a Pelvis-Soft Tissue Mechanical Model
Provedor de dados: 77
Autores: Gayol-Mérida,Diana Alicia; Enríquez-Rivera,Luis Alberto; Araujo-Monsalvo,Víctor Manuel; Alemán-Pérez,Aylenid; Baez-Rivas,Livier; Domínguez-Hernández,Víctor Manuel.
Pressure ulcers are tissue damage resulting from the constant pressure on the underlying soft tissue to bony prominences for long periods. Some of the most common ulcers are developed at the ischial tuberosities area (ITs). It has been found that stresses produced in the underlying tissue to the ITs may exceed 5 to 11 times the surface stresses, making it necessary to estimate the forces generated between the soft tissue and the ITs. However, it is not possible to determine these stresses in vivo in a patient, due to ethical reasons. This paper presents a mechanical model of the pelvis-soft tissue in order to study the behavior of contact forces. The model simulates the load on the ITs of a male subject of 70 kg weight and 1.70 m height, which were...
Tipo: Journal article
Palavras-chave: Pressure ulcer; Pressure sensor; Mechanical model.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300028

Students' Opinions on the Use of Computer Rooms for Teaching Anatomy
Provedor de dados: 77
Autores: Cabral,Etenildo Dantas; Barbosa,Joanna Martins Novais.
The present study aimed to survey students' opinions on the use of computer-aided classes for teaching anatomy. Thus, a questionnaire with closed questions was administered at the end of the Anatomy course to undergraduate dental students, which produced a total of 76 valid questionnaires. While studying this subject, the students accessed a room equipped with computers containing previously installed Anatomy programs. The analysis of the questionnaires showed that for most students the computer room considerably facilitates the study of Anatomy and potentially increases the comprehension of the lessons' goals, as well as being an extremely important aid in studying anatomy. However, most students reported that they did not prefer this learning tool to the...
Tipo: Journal article
Palavras-chave: Anatomy; Education; Educational technology; Teaching Methods.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022005000300013

Ppe Tube Filled With Autologous Fat in the Repair of Peripheral Nerve: A New Proposal
Provedor de dados: 77
Autores: Toledo,Gustavo Lopes; da Silva de Menezes,Juliana Dreyer; de Almeida Nascimento,Juliana; Andreo,Jesus Carlos; Buchaim,Rogério Leone; Shinohara,André Luis; Rosa Junior,Geraldo Marco; de Castro Rodrigues,Antonio.
This study proposes the use of a porous polyethylene (PPE) tube as the conductive element in the regeneration in the sciatic nerve sectioning and evaluates the use of fill with autologous fat. The subject was divided randomly into five groups, 3 control and 2 experimental (PPE tube graft with/ without autologous fat). Each group was selected for functional, histological and morphometric evaluation of the sciatic nerve. Functional analysis of the sciatic nerve occurred through the "footprint" values near -100 refer sectioned sciatic nerve, near 0 (zero) refer to control group. On histological analysis of the experimental groups lots of dense connective tissue replacing nerve tissue was observed. In morphometric analysis the group EGPGf got higher...
Tipo: Journal article
Palavras-chave: Rat sciatic nerve; Axonal regeneration; Porous polyethylene pipe.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300055

Learning Anatomy Through Dissection: Perceptions of a Diverse Medical Student Cohort
Provedor de dados: 77
Autores: Van Wyk,J; Rennie,C.O.
The debate on how best to teach anatomy and the central role of cadaveric dissections in medical training remains topical even today. Despite the use of a variety of teaching methodologies e.g. prosected specimens, plastinated specimens, cadaveric dissection and computer-assisted learning, the amount of time dedicated to a full body human dissection programme, its clinical relevance and whether it promotes deeper learning has become a bone of contention in problem- based learning context. The implementation of student centred, PBL curricula means that students' learning is autonomous, and studies suggest the link between students' approaches to learning with their perceptions of their learning environment. Therefore, this study explored the perceptions of...
Tipo: Journal article
Palavras-chave: Teaching and learning in anatomy; Dissection; Problem based learning; Undergraduate medical program; Student perceptions.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100015

Bilateral Supernumerary Sternocleidomastoid Heads with Critical Narrowing of the Minor and Major Supraclavicular Fossae: Clinical and Surgical Implications
Provedor de dados: 77
Autores: Raikos,Athanasios; Paraskevas,George K; Triaridis,Stefanos; Kordali,Panagiota; Psillas,George; Brand-Saberi,Beate.
Anatomical variations of the sternocleidomastoid muscle are rare and concern its origin, insertion, and the number of heads. We report on a rare bilateral variant of the sternocleidomastoid muscle with aberrant and supernumerary muscular heads, observed in a cadaveric subject. On the right side of the neck, a typical sternomastoid head of the sternocleidomastoid muscle, and three aberrant clavicular heads of variable thickness, origin, and termination were noticed. On the left side, two sternomastoid heads were present; the medial one was of typical pattern, while the lateral was supernumerary. The cleidomastoid portion of the left sternocleidomastoid muscle was fused with the double sternomastoid segment. A strap-like muscle originating from the middle...
Tipo: Journal article
Palavras-chave: Cleidocervical; Cleido-occipital; Sternocleidomastoid; Sternomastoid; Supraclavicular fossa; Ultrasound; Variant.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300027

Morphometric Analysis of Nucleus and Nucleolar Organizer Regions (NORs) in Tongue Squamous Cell Carcinoma (SCC)
Provedor de dados: 77
Autores: Padovani,J. A. Jr.; Monteiro,R.; Zan,T.; Azoubel,R.; De Santi,D.; Taboga,S; Martins,A.
The tongue is one of the most likely places for the primary squamous cell carcinoma (SCC) to arise in the western world.This work intends to do a morphometric evaluation of the cellular nucleus, as well as a morphometric analysis of the nucleolar organizer regions (NORs). The biopsy specimen was removed from patients with tongue SCC, staged T2N0M0, before they underwent treatment. They were, then, subject to hemiglossectomy and supraomohyoid neck dissection (SOHND) and presented different clinical evolution. According to that, they were subdivided in three groups: Group A, control group, formed by patients without tongue neoplasm (the histopathologic specimen was obtained from the Department of Pathology at Hospital de Base and Faculdade de Medicina de Sao...
Tipo: Journal article
Palavras-chave: Morphometric; Tongue; Squamous cell carcinoma.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000300004

Study of Prosopic (Facial) Index of Indian and Malaysian Students
Provedor de dados: 77
Autores: Shetti,Vaishali R; Pai,Shakunthala R; Sneha,G. K; Gupta,Chandni; Chethan,P; Soumya,.
For several generations physical anthropologists measured skulls in the belief that thereby they were likely to obtain results, this would enable them to trace the relationships between the races of mankind. It was believed that the form of the skull in particular remained constant in each race, and that different races typically showed different facial indices. Form of the head and face is now known to be subject to change through environmental influences. Measurement is necessary in order to obtain this kind of knowledge, and in order to be able to give as accurate a description of an individual or group of individuals as possible. The present study aimed at measuring facial index of both sex in Malaysian and Indian students. 300 students of both nations...
Tipo: Journal article
Palavras-chave: Facial index; Face length; Face width; Anthropometry.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300060

Rodent Amelogenin in Akodon azarae and Lagostomus maximus
Provedor de dados: 46
Autores: Fernández Feijóo,María Eugenia; Dejean,Cristina B; Gómez,Martín A; Espinosa,María Beatriz.
The amelogenin gene, AMEL, encodes an important protein for tooth enamel formation during development. It is highly conserved among mammals. The AMEL gene, which is located in sex chromosomes in humans, exhibits a length polymorphism for the X and Y copies of the gene. This length polymorphism has been reported in several mammal species, and the differences between the X and Y chromosomes are used for sex determination by amplifi cation of the polymorphic regions. In this work, we analyzed AMEL in Akodon azarae and Lagostomus maximus. In order to assess the identity of the individuals and verify the presence or absence of chromosomal rearrangements, a cytogenetic study was performed. To amplify the AMEL region, specifi c primers were designed using the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amelogenin; AMELX; AMELY; Lagostomus; Akodon.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332010000100003

ANTITUMOR EFFECT OF SNAKE VENOMS
Provedor de dados: 79
Autores: SILVA,R. J. DA; FECCHIO,D.; BARRAVIERA,B.
The search for biological antitumor agents has been pursued for over half a century. Snake venom has been shown to possess a wide spectrum of biological activities. The objectives of the present review are to evaluate the existing controversies on this subject published in a number of papers and to propose probable explanations for the phenomena observed. We reported our results obtained in a study, in which we evaluated the action of the venoms of Crotalus durissus terrificus and Bothrops jararaca on Ehrlich ascites tumor cells. We noticed an important antitumor effect, mainly with Bothrops jararaca venom, as well as an increase in the functional activity of macrophages. We also observed an increase in the number of mononuclear and polymorphonuclear cells...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cancer; Inflammation; Venom; Snakes; Crotalus durissus terrificus; Bothrops jararaca.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301996000200002

Immunomodulatory action of propolis on macrophage activation
Provedor de dados: 79
Autores: ORSI,R.O.; FUNARI,S.R.C.; SOARES,A.M.V.C.; CALVI,S.A.; OLIVEIRA,S.L.; SFORCIN,J.M.; BANKOVA,V.
Propolis has been the subject of several recent studies, with the aim of elucidating its biological and pharmacological properties. Propolis has a well-known antimicrobial activity as well as antioxidant, antitumoral, antiinflammatory, and regenerative properties, but literature about its effects on the immune response is scarce. The goal of this work was to evaluate the propolis effect on macrophage activation by oxygen (H2O2) and nitrogen (NO) metabolite determination. Propolis was produced by africanized honeybees and hydroalcoholic solutions were prepared at different concentrations. Peritoneal macrophages were obtained from male BALB/c mice and culture cells were stimulated in vitro with propolis or interferon-gamma (IFN-gamma). In the in vivo assay,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propolis; Macrophages; Hydrogen peroxide; Nitric oxide.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000200006

Evaluation of the impact of printed matter, video, and multimedia on the learning/teaching process in tropical diseases
Provedor de dados: 79
Autores: SARMENTO E SOUZA,M. F.; CATANEO,A.; BARRAVIERA,B.
This study evaluated the impact of printed matter, video, and multimedia on the learning/teaching process in Tropical Diseases. Eighty-four of 90 fourth-year medical students at Botucatu School of Medicine of UNESP were evaluated. The students received a kit containing a textbook, a video, and a CD-ROM on the Clinical Study of Tetanus to prepare a seminar on the subject. They were then asked to complete a questionnaire, which led to the following conclusions: 67.86% read the textbook, 91.66% watched the video, and 77.38% explored the CD-ROM. These results were obtained observing the total number of students using each different media. When asked which of these media contributed most, the CD-ROM came out on top. The authors stress that this learning...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medical education; Tropical diseases; Multimedia; Video; Printed matter.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302001000200009

Seasonal effect of Brazilian propolis on seric biochemical variables
Provedor de dados: 79
Autores: SFORCIN,J. M.; NOVELLI,E. L. B.; FUNARI,S. R. C.
Propolis has been the subject of recent scientific investigation due to its biological properties, such as antibiotic, antiinflammatory, anesthetic, healing, immunomodulatory, antioxidant, and carcinostatic. The purpose of this study was to analyze the biochemical profile of propolis-treated rats to observe whether propolis might lead to side effects after administration. Evaluation of total protein, glucose, urea, creatinine, triglycerides, cholesterol, and HDL-cholesterol concentrations and determination of aminotransferases (AST and ALT) and lactic dehydrogenase (LDH) in propolis-treated rat serum were performed. The seasonal effect on propolis activity was also analyzed, considering the biochemical variables evaluated. The lack of clinically important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propolis; Season; Biochemistry; Serum.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302002000200005

What is the optimum concentration of m-cresol in antivenoms?
Provedor de dados: 80
Autores: Abd-Elsalam,MA; Abdoon,N; Al-Ahaidib,MS.
Antivenoms against snake and scorpion envenomations are usually equine in nature and composed mostly of F(ab')2; additionally, phenol and m-cresol are mainly employed for their preservation. Although there is no study on this subject, m-cresol is utilized by most manufacturers in a concentration that ranges from 0.15 to 0.35 g%. Decreasing the concentration of m-cresol to its minimal effective level may protect victims from its toxic effects and keep the antivenom stable during its shelf life without forming any aggregates. In the present work, different concentrations of m-cresol, ranging from 0.1 to 0.35 g%, were used with some selected batches of snake and scorpion antivenoms. A low concentration of 0.15 g% showed an acceptable preserving result that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antivenoms; Preservative; M-cresol; Stability.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992011000100003

A new scenario of bioprospecting of Hymenoptera venoms through proteomic approach
Provedor de dados: 80
Autores: Santos,LD; Pieroni,M; Menegasso,ARS; Pinto,JRAS; Palma,MS.
Venoms represent a huge and essentially unexplored reservoir of bioactive components that may cure diseases that do not respond to currently available therapies. This review select advances reported in the literature from 2000 to the present about the new scenario of Hymenoptera venom composition. On account of new technologies in the proteomic approach, which presents high resolution and sensitivity, the combination of developments in new instruments, fragmentation methods, strategic analysis, and mass spectrometry have become indispensable tools for interrogation of protein expression, molecule interaction, and post- translational modifications. Thus, the biochemical characterization of Hymenoptera venom has become a major subject of research in the area...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hymenoptera; Venoms; Allergens; Phospholipase A1; Wasp venom antigen 5; Hyaluronoglucosaminidase; Mass spectrometry; Proteomics.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992011000400003

The Kinker diatom collection: discovery – exploration – exploitation
Provedor de dados: 16
Autores: Sterrenburg, F.A.S.; Wolf, H. de.
Johannes Kinker (1823-1900) was a typical representative of the Victorian ‘amateur-savant’. As a wellto- do stockbroker he was able to invest considerable time and money into studies of nature, first entomology and subsequently diatoms. The latter subject flourished in the late 19th century and, among his international contemporaries, Kinker was regarded as “the only Dutch diatomist of renown”. There is a marked discrepancy between this reputation in his own time and his complete obscurity since, for which there are two reasons; Kinker did not publish, and his collection was not known to exist. Our discovery of the virtually intact Kinker diatom collection after it had vanished for a century can be regarded as a cultural heritage conservation paradigm; the...
Tipo: Article / Letter to the editor
Palavras-chave: Diatoms; Typification; 42.35.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/215472

A list of the birds known from Roti and adjacent islets (Lesser Sunda Islands)
Provedor de dados: 16
Autores: Mees, G.F.
INTRODUCTION Father Verheijen (in press) has given a narrative of his visit to Roti, with a list of all birds recorded from material, personal observations, and hearsay. Although several of Verheijen's own field observations are entirely reliable, other species mentioned by him cannot be regarded as of anything but very doubtful occurrence. Therefore I have considered it useful to compile a list of those birds which are now known from collected specimens. Previous to Father Verheijen's studies, ornithological knowledge of Roti rested entirely on a visit to the island made by the anthropologist Dr. H. F. C. ten Kate in 1891 (22 August — 9 September). During his stay ten Kate did some collecting of miscellaneous zoological objects, which he forwarded to...
Tipo: Article / Letter to the editor
Palavras-chave: 42.83.
Ano: 1975
URL: http://www.repository.naturalis.nl/record/318750

Editorial
Provedor de dados: 16
Autores: NN.
The frontispiece of this number serves to feast our eyes on the daring fecit of Mr. Corner who has now organized the Malaysian Moraceae, a work on which he has spent more than a decade of intensive work, following many years of earlier work in prewar time. Daring because it confronts us with an attempt to make an imaginary picture of the prototype, or archetype, of a family as it emerged from this study. I feel certain that this will stimulate interest in evolutional thinking on the basis of morphology and anatomy combined with geography. Elsewhere in this number Mr. Corner has let himself go on the subject, how this work grew under his hands and became synthesized in his mind; may especially our younger colleagues be instructed and refreshed by it. Work...
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/533135

Review
Provedor de dados: 16
Autores: Schuiteman, A.
Judging from the title this would be a book for a distinctly limited audience. After all, only very few of the more than 430 South African orchid species are in general cultivation. For two reasons that judgement would be wrong. First, many South African orchids deserve to be much more widely cultivated. This book may be considered an excellent promotion for these beautiful but neglected species. Second, this book could well be described as an up-to-date guide to orchid growing, where the examples happen to be South African species. Especially valuable is the detailed information on cultivating terrestrial species. These are generally much more difficult to grow than the epiphytic ones, and most of the advice given here applies just as well to Australian...
Tipo: Article / Letter to the editor
Ano: 1998
URL: http://www.repository.naturalis.nl/record/524474

Introduction
Provedor de dados: 16
Autores: George, A.S.; Kalkman, C.; Geesink, R.
When Flora Malesiana began, officially in 1950, its aim was to produce a comprehensive survey of an estimated 25,000 plant species in a period of a few decades. On the one hand the Flora had to be concise, on the other hand it had to be “a replacing encyclopedia” for all previously published knowledge. The approach was generally called ‘semi-monographic’, indicating that a certain degree of ‘completeness’ was to be realized in the treatments. Even in 1960, ten years later, the founder, Professor van Steenis wrote in an official report that the period necessary for completion would be 30 years (from 1960 onwards) and that the total size would be equivalent to 20 volumes like volumes I, 4 and I, 5 that had appeared in the first decade. Had Professor van...
Tipo: Article / Letter to the editor
Ano: 1989
URL: http://www.repository.naturalis.nl/record/533428

Reviews
Provedor de dados: 16
Autores: Hou, Ding; Steenis, C.G.G.J. van; Lam, H.J.; Ooststroom, S.J. van; Barkman, J.J.
The publication of the supplement 1 of the well known and essential reference work of “A Bibliography of Eastern Asiatic Botany” is very welcome. It is a continuation of the original work, which closed with 1936, and extends through 1958. It covers the botanical literature on eastern Asia, as indicated by the title, which comprises China, Japan, Korea, Ryukyu, Mongolia and Soviet eastern Asia, as well as the major published papers appertaining to adjacent areas. It has been prepared on essentially the same pattern as the original volume while the subject index has been treated perhaps in a more thorough manner. The volume contains over 11,000 extensively and carefully annotated entries occupying 414 pages. The work is in English but the titles, papers and...
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/524871

Some data on the status of the Spoonbill, Platalea leucorodia L., in Europe, especially in the Netherlands
Provedor de dados: 16
Autores: Brouwer, G.A.
(33rd Publication of the Vogeltrekstation Foundation) The steady increase of the human population with all its consequences is an omnipresent threat to the wildlife of the Netherlands, especially to the larger animals who make greater demands on their habitat. That is why preservationists must continuously watch that the living conditions of such species do not drop below a certain level. Besides the various reclamation works and reallotment schemes that have been carried out all over the country, the huge hydraulic-engineering works, known as the "Delta Plan" in the provinces of Zuid-Holland and Zeeland will probably prove to have a really serious effect on the birds that are in the habit of feeding in tidal waters. For these hydraulic works will close...
Tipo: Article / Letter to the editor
Palavras-chave: 42.83.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/319089

A collection of Decapod Crustacea from Sumba, Lesser Sunda Islands, Indonesia
Provedor de dados: 16
Autores: Holthuis, L.B.
The Sumba-Expedition undertaken by Dr. E . Sutter of the Naturhistorisches Museum of Basle and Dr. A . Bühler of the Museum für Völkerkunde of the same town, visited the Lesser Sunda Islands, Indonesia, in 1949. Dr. Sutter, the zoologist, stayed in the islands from 19 May to 26 November; most of the time was spent by him in Sumba (21 May-31 October), and extensive collections were made there, among which a most interesting material of Decapod Crustacea, which forms the subject of the present paper. A few Crustacea were collected on the islands of Sumbawa (on 19 May) and Flores (19 and 21 November). The animals taken at Flores belong to species also obtained in Sumba and will be treated here with those; at Sumbawa two hermit crabs belonging to the species...
Tipo: Article / Letter to the editor
Palavras-chave: Decapod Crustacea; Indonesia; Sumba; Sumbawa; Flores; 42.74.
Ano: 1978
URL: http://www.repository.naturalis.nl/record/323937

On the systematic position of the Western Hamster, Cricetus cricetus canescens Nehring (Mammalia: Rodentia)
Provedor de dados: 16
Autores: Husson, A.M.
The systematic position of the western hamster, Cricetus cricetus canescens, has been a subject of discussion and criticism ever since NEHRING (1899, pp. 1—2) described the hamster occurring in Belgium west of the Meuse as a separate variety. The present paper is a new effort to throw more light on the interesting question concerning the systematic characters by which the western hamster can be distinguished from the typical form described from central Germany. For a better understanding of the present study a brief survey of the main points in the historical development of this problem follows here. According to NEHRING the main characters in which his new variety, Cricetus vulgaris var. canescens, differed from the typical form, were: (1) the dark...
Tipo: Article / Letter to the editor
Ano: 1959
URL: http://www.repository.naturalis.nl/record/503947

Lysichiton americanus Hultén &amp; H.St.John, een imposante indringer
Provedor de dados: 16
Autores: Peeters-Van der Meijden, Kitty; Rotteveel, Ton.
Lysichiton americanus Hultén &amp; H.St.John is een van origine uit Noord-Amerika afkomstige moerasplant die oprukt in Europa. Er zijn vindplaatsen in Duitsland, Zwitserland, Ierland, het Verenigd Koninkrijk, Denemarken, Zweden en Noorwegen. Tot voor kort was de soort in Nederland buiten tuinvijvers en kwekerijen nog niet waargenomen, maar in april 2005 werd de soort gemeld uit een broekbos in de gemeente Brummen.1 Lysichiton americanus is door het Panel on Invasive Plants van de European Plant Protection Organisation beoordeeld als quarantainewaardig.2 De soort vormt een bedreiging voor de biodiversiteit in het kwetsbare milieu van vochtige bossen waarin de planten zich een plaats hebben veroverd. Op basis van deze beoordeling nam de Directie Natuur van...
Tipo: Article / Letter to the editor
Ano: 2006
URL: http://www.repository.naturalis.nl/record/527075

Contribution to the knowledge of the genera Muntiacus and Arctogalidia in the Indo-Australian Archipelago (Mammalia, Cervidae &amp; Viverridae)
Provedor de dados: 16
Autores: Bemmel, A.C.V. van.
As I have pointed out before, big game animals are very scarce in Museum collections. Many treatises are based on material from Zoological gardens, changed by captivity and often from unknown origin, from collections of frontlets, skulls and other trophies, bought haphazardly during expeditions which used all their time in thoroughly collecting the more interesting small animals. As a matter of fact, the rare species are better represented than the common ones, and the more a well-known species of game-animal is hunted, the fewer the specimens in the collections of the official Musea. The same is true for our knowledge of the biology of tropical big-game. Rare species, threatened by extinction, are studied with haste and often when it is too late to...
Tipo: Article / Letter to the editor
Ano: 1952
URL: http://www.repository.naturalis.nl/record/505222

On Choniostoma and Heptalobus (Copepoda, Choniostomatidae)
Provedor de dados: 16
Autores: Stock, J.H.
In the course of a study of prawns infected by epicarid isopods, I observed some specimens of Spirontocaris lilljeborgi (Dan.) showing deformations of the carapax very similar to those caused by parasitic isopods (fig. 1). In this case, however, the swellings of the carapax were not caused by epicarids, but by parasitic copepods of the family Choniostomatidae, lodged in the branchial cavity of the prawn. After painstaking dissection and examination of the appendages, I believe that my material belongs to a new species of the genus Choniostoma, for which the name Ch. rotundatum is proposed. Hitherto, 2 species only have been referred to the genus Choniostoma: Ch. mirabile Hansen, and Ch. hanseni Giard &amp; Bonnier. These two species have been described in...
Tipo: Article / Letter to the editor
Ano: 1958
URL: http://www.repository.naturalis.nl/record/505246

Contributions to Zoology, the journal - diversity in research topics and changes over the last 27 years
Provedor de dados: 16
Autores: Vonk, R.; Nijman, V.
We provide a brief overview of the history of the journal Contributions to Zoology and analyse the papers published in the last 27 years by topic. Founded in 1848 as ‘Bijdragen tot de Dierkunde’, 160 years and 76 volumes later it is one of the oldest zoological journals that is still regularly printed. Over the last decades most papers dealt with invertebrates (60%), followed by vertebrates (23%), insects (10%) and non-taxonomic papers. Contributions to Zoology has seen a change from a largely alpha taxonomic journal to one that is truly general in scope. Systematic Biology and Comparative Morphology of both extant and extinct taxa nowadays make up about half of the papers published. Ethology as a research subject has been gradually phased out, and judged...
Tipo: Article / Letter to the editor
Palavras-chave: Bibliographic analysis; Biological research trends; 42.01.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/262650

Pollen morphology and taxonomy in the Loganiaceae
Provedor de dados: 16
Autores: Punt, W.; Leenhouts, P.W.
The Loganiaceae is a heterogeneous, eurypalynous family with colpate, colporate or porate pollen grains (Erdtman 1952). Some years ago Dr. Leeuwenberg, specialist in the taxonomy of African Loganiaceae, asked the senior author to undertake an investigation of the pollen grains of that family. Unfortunately that was impossible at the time because of other commitments. Later, however, a possibility presented itself for carrying out the investigation in connection with a sojourn at the Palynological Laboratory at Solna. I am much indebted to Professor Erdtman for the invitation to work at this Laboratory, for his approval of the subject, and for many discussions on pollen morphology. I am also much indebted to Dr.Leeuwenberg, Wageningen, and Dr. Leenhouts,...
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/535125

Is er een grens tussen het Löss- en het Krijtdistrict?
Provedor de dados: 16
Autores: Hommel, P.
The subdivision of the Netherlands in plantgeographical districts by VAN SOEST (1929) has recently become the subject of a series of investigations by the department for the Netherlands flora of the Rijksherbarium in Leiden (MENNEMA, 1978). This paper deals with one of these investigations, a field study on the border of the Loess and the Chalk district in the South of the Netherlands. In the course of 1976 30 square kilometers were visited and an inventarisation was made of their floristic composition. The data for the distinct square kilometers were subsequently processed by means of the so-called Mennema-methody (MENNEMA, 1973), comparing them in number of species as well as on the basis of „ecologicalgroups” and some critical species. Moreover, to get...
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/526699

The Hydrachnellae of the Oudemans collection
Provedor de dados: 16
Autores: Besseling, A.J.
On several occasions the Hydrachnellae of the Oudemans Collection have been the subject of a publication. In 1898 Oudemans himself published a "List of Dutch Acari, 6th part, Hydrachnellae Latr., 1802" in which nineteen indigenous species were enumerated. Afterwards Romijn (1916) dealt with 'Oudemans' Hydracarina", thereby increasing the number of Dutch species to 26, although he paid attention to the adult mites only. Finally there appeared a catalogue of the Oudemans Collection, prepared by Buitendijk (1945), in which the Hydrachnellae are listed on pp. 343-347. Because Buitendijk (1945) considered her catalogue a preliminary one, it is evident that reliable conclusions on the material were still to be awaited. This justifies the appearance of the...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1955
URL: http://www.repository.naturalis.nl/record/317961

Some preliminary notes on Surinam Sting Rays, including the description of a new species
Provedor de dados: 16
Autores: Boeseman, M.
In Dr. D. C. Geijskes' collection of Surinam fishes, mentioned in my previous paper on this subject (Boeseman, 1948), I found six specimens belonging to the so-called "sting rays" (Dasyatidae), representing three different species, and all very interesting in some respects. I. Dasyatis schmardae (Werner). Trygon schmardae Werner, 1904, p. 298 (Jamaica). Dasybatus schmardae, Garman, 1913, p. 386 (after Werner). Dasybatus schmardae, Meek &amp; Hildebrand, 1923, p. 81 (Toro Point &amp; Mindi Cut, Panama Canal). Dasyatis schmardae, Fowler, 1931, p. 391 (Vessigny River at Brighton, Trinidad). Four specimens, from Coppenam Point, Surinam, coll. Dr. D. C. Geijskes, Dec. 1942, 2 ♂ ♂ measuring 530 and 575 mm, 2 ♀ ♀ measuring 610 and 705 mm. The condition of the...
Tipo: Article / Letter to the editor
Palavras-chave: 42.81.
Ano: 1948
URL: http://www.repository.naturalis.nl/record/318932

On Blarina pyrrhonota and Echimys macrourus: Two Mammals incorrectly assigned to the Suriname Fauna.
Provedor de dados: 16
Autores: Husson, A.M.
When revising the Suriname mammals preserved in the collection of the Leiden Museum I also examined the type specimens of Echimys macrourus and Blarina pyrrhonota, described from Suriname by JENTINK in 1879 and 1910, respectively. As a result of this investigation I reached the conclusion that the two types are apparently incorrectly labelled as to locality. For Blarina pyrrhonota strongly resembles Sorex araneus Linnaeus from Europe, while Echimys macrourus shows a close resemblance to one of the forms of Rattus sabanus (Thomas), which has a wide distribution in the Malaysian subregion (see CHASEN, 1940, p. 164—167). In the literature dealing with Neotropical mammals, the systematic position of both Blarina pyrrhonota and Echimys macrourus has been the...
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/506277

The Oribatei (Acari) of the Netherlands
Provedor de dados: 16
Autores: Hammen, L. van der.
INTRODUCTION The study of the Oribatei (moss mites or beetle mites) of the Netherlands was started by Oudemans, who in 1896 published his "List of Dutch Acari, First Part, Oribatei", that was followed in 1900 and 1902 by a first and by a second part of a "New List". After that time Oudemans repeatedly published papers in which Oribatei of the Netherlands were dealt with, although in his later years he paid less attention to this group of Acari. Only a part of the moss mites that Oudemans collected were mentioned by him; a preliminary catalogue of his collection, containing some hitherto unpublished faunistical data on Oribatei, appeared after his death (Buitendijk, 1945). Willmann (1930) published a note on interesting Oribatei in the Oudemans Collection,...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1952
URL: http://www.repository.naturalis.nl/record/317841

Asteroids from the Netherlands Antilles and other Caribbean localities
Provedor de dados: 16
Autores: Ummels, F.
The material brought back by Dr. P. WAGENAAR HUMMELINCK from his various trips to the West Indies includes a number of starfish, which — with exception of the specimens belonging to Astropectinidae, Echinasteridae and Goniasteridae — were given to the present author as a subject for taxonomic examination. This resulting contribution to science is the outcome of no more than a few months of practical work under the direction of Dr. HUMMELINCK, and can therefore not be other than a rather superficial study, in which only additional material from the museums in Amsterdam and Leiden has been considered. The material covered in this paper comprises: Oreaster reticulatus (L.), from BIMINI, NEW PROVIDENCE, CUBA, JAMAICA, HISPANIOLA, ST. MARTIN, LOS TESTIGOS,...
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/506078

Provisional host catalogue of Fig wasps (Hymenoptera, Chalcidoidea)
Provedor de dados: 16
Autores: Wiebes, J.T.
INTRODUCTION In this catalogue — entitled "provisional" because our knowledge of the subject is still so evidently incomplete — all species of Ficus mentioned as hosts of fig wasps, are listed with the Hymenoptera Chalcidoidea reared from their receptacles. The names used for the Agaonidae are in accordance with those in Grandi's (1963b) world catalogue of this Chalcidoid family, two items excepted for nomenclatorial reasons, viz. Blastophaga (B.) inopinata and B. (Eupristina) jacobsoni. Blastophaga (B.) puncticeps distinguenda Grandi (1916a: 129), if considered conspecific with B. (B.) inopinata Grandi (1926: 355), should be called B. (B.) d. distinguenda Grandi, while B. (B.) puncticeps sensu Grandi (1916a: 129) not Mayr (1906: 156), should be indicated...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1966
URL: http://www.repository.naturalis.nl/record/317878

A Critical Revision of the Genus Aristida being a preliminary study and an introduction to the monograph
Provedor de dados: 16
Autores: Henrard, J.Th.
Being engaged during several years with a revision of the grasses preserved in the Rijks-Herbarium at the University of Leyden, my attention was called to the group of the Stipeae, and especially to the very difficult genus of Aristida. After an exhaustive study of the literature, I thought it desirable to have a monograph of this genus, containing extensive keys for the determination of all the species hitherto known, and I resolved to prepare such a work. It has been my good fortune that I had at my disposal not only the valuable collections of the Rijks-Herbarium, but that by the courtesy of the directors of the great herbaria in Europe and in America, I could study many thousands of specimens, among them authentic specimens and types. So several years...
Tipo: Article / Letter to the editor
Ano: 1926
URL: http://www.repository.naturalis.nl/record/508348

On the comparative anatomy and function of the nasal tract in odontocetes (Mammalia, Cetacea)
Provedor de dados: 16
Autores: Schenkkan, E.J.
In the study of phonation in odontocete cetaceans and particularly that of echolocation by means of sonar, a great number of conflicting hypotheses have been advanced regarding the correlation of sound production with the many anatomical features that are to be found in the upper respiratory tract. The present paper follows a new approach via finding out if, and how, the various structures had evolued from the condition in the relatively primitive River Dolphins to the more highly specialized pelagic species. An introduction to the general anatomy of the upper respiratory tract is given, relating it to work previously published on this subject. A historical review of the various theories of sound production establishes the essence of the existing...
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/504295

The polyporoid types of Junghuhn preserved at Leiden. Letter No. 37
Provedor de dados: 16
Autores: Lloyd, C.G.
JUNGHUHN was among the first to name foreign species of fungi. He made large collections in Java and published a paper that was finely illustrated, in 1839. If all of his types were destroyed many of his species would still live, for he gave good accounts of them and good figures of many of them. All of the figures that he cites were not published as it was his intention to continue the work, and he numbered his paper „Fasc. 1,” but no further paper were issued by him on the subject. Dr. GOETHART assures me that the originals of JUNGHUHN’S figures are not preserved in the museum at Leiden. However, there are at Leiden colored drawings of a large number of Javanese fungi, and they are the best I have ever seen of tropical fungi. The name of the author of...
Tipo: Article / Letter to the editor
Ano: 1912
URL: http://www.repository.naturalis.nl/record/508357

Hapalemur simus
Provedor de dados: 16
Autores: Schlegel, H.
The late Director of the British Museum, Dr. J. E. Gray in establishing this species, (Catalogue of Monkeys, London, 1 Dec. 1870, p. 133) assigns to it the following characteristics: “Back iron-grey, with a rufous tinge; the hairs black, with a subapical rufous band, and the lower part leadcoloured; throat whitish; patch on rump at base of tail yellowish. — Hapalemur griseus, Schlegel et Pollen, Faune Madagasc. p. 6, t. 3 et 7, fig. 4. (skull without upper cutting-teeth) — Habits Madagascar. — This may be Hapalemur olivacea; but that species is very imperfectly described, and it is said to have a different form of the hinder part of the lower jaw; but what the difference is, is not mentioned; and I do not see any difference in the hinder part of the lower...
Tipo: Article / Letter to the editor
Ano: 1880
URL: http://www.repository.naturalis.nl/record/508717

The Algae transported on drifting objects and washed ashore on the Netherlands coast
Provedor de dados: 16
Autores: Lucas, J.A.W.
Little attention has been paid till now to the algae, transported to the Netherlands coast on drifting objects. About a century ago T. D. Vrijdag Zijnen and G. Bisschop (near Scheveningen, ± 1845), and L. H. Buse (between Wijk aan Zee and Zandvoort, ± 1840—1847) were the first to pay attention to this subject. The material collected, especially that by the first two investigators, is mentioned in the Prodromus Fl. Bat. (1853). The book of Van Goor (1923) contains a chapter on these algae, in which, however, only few new observations occur. The author is much indebted to Dr Josephine Th. Koster for her kind help, as well as to Dr S. J. v. Ooststroom. The material, collected by Vrijdag Zijnen, Bisschop and Buse is almost completely present in the collections...
Tipo: Article / Letter to the editor
Ano: 1950
URL: http://www.repository.naturalis.nl/record/526249

Revisions of African Moraceae (excluding Dorstenia, Ficus, Musanga and Myrianthus)
Provedor de dados: 16
Autores: Berg, C.C.
In continuation of de Ruiter’s treatment of Myrianthus and Musanga (Bull. Jard. Bot. Nat. Belg. 46: 471-510.1976), the present paper gives a revision of the African representatives of 17 genera of the Moraceae. The area studied not only consists of the African Continent, but also includes Madagascar, the Comoro Islands, the Mascarenes, the Seychelles, and the Aldabra Islands. Several new combinations are made: Antiaris toxicaria ssp. africana (Engl.) C.C. Berg, A. toxicaría ssp. africana var. usambarensis” (Engl.) C.C. Berg, A. toxicaria ssp. macrophylla (R.Br.) C.C. Berg, A. toxicaría ssp. madagascariensis (H. Perrier) C.C. Berg, A. toxicaria ssp. humbertii (Léandri) C.C. Berg, Broussonetia greveana (Baillon) C.C. Berg, Treculia africana ssp....
Tipo: Article / Letter to the editor
Ano: 1977
URL: http://www.repository.naturalis.nl/record/534812

Rows of small teeth in Ziphioid whales
Provedor de dados: 16
Autores: Boschma, H.
In Ziphioid Whales the toothrows as a rule have been subject to pronounced reduction, so that the number of teeth of fairly large size is restricted to one pair in the lower jaw. Even these often are concealed in the gum and then must be regarded as functionless, though especially in old males the tips of these teeth protrude above the gum and may be used for the capture of the prey. In many species, besides the larger teeth in the lower jaw, rows of smaller teeth have been found in both jaws, often completely hidden in the gum, sometimes with their tips protruding. In Tasmacetus shepherdi Oliver these smaller teeth are of fairly large size, they show signs of wear against their antagonists of the other jaw, indicating that here they are functional. The...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1951
URL: http://www.repository.naturalis.nl/record/318242

Riempjes (Corrigiola litoralis L.) terug in het rivierengebied
Provedor de dados: 16
Autores: Peters, Bart W.E.; Weeda, Eddy J.; Teunissen, Twan H.; Berg, Louis-Jan van den.
Until the mid-20th century, Corrigiola litoralis was recorded from river banks in several parts of the Dutch riverine area where it mainly occurred along the River Meuse and the River Waal. For a few decades, the species appeared to have become extinct in this habitat due to river canalisation and intensive agriculture, but in recent years it has been found again on river sides. In 1999, a single specimen was observed on a gravel bank along the River Meuse. In the Nijmegen region, the species seems to have reclaimed its former area along the River Waal. After the re-emergence of active sandy levees due to nature rehabilitation projects and several flood events, the species has become gradually more numerous there since 1996. Hitherto, Corrigiola litoralis...
Tipo: Article / Letter to the editor
Ano: 2004
URL: http://www.repository.naturalis.nl/record/527622

Birds from the Lowlands of Southern new Guinea (Merauke and Koembe)
Provedor de dados: 16
Autores: Mees, G.F.
INTRODUCTION In the periods January 1959-June 1961 and February-September 1962, a total of about three years, the late Mr. A. Hoogerwerf was attached to the experimental rice farm Koembe near Koerik, not far from the mouth of the Koembe River, southern New Guinea, where he was in charge of investigations concerning crop-damage caused by birds and mammals. The results of his work were published in an important report (Hoogerwerf, 1962), in which it was suggested that certain alterations in the pattern of agricultural activities, like changes in the times of flooding and planting of the fields, could reduce damage by water birds without need to resort to the drastic measures so frequently taken against wildlife when man feels only in the slightest...
Tipo: Article / Letter to the editor
Palavras-chave: 42.83.
Ano: 1982
URL: http://www.repository.naturalis.nl/record/317858

A preliminary list of Surinam fishes not included in Eigenmann's enumeration of 1912
Provedor de dados: 16
Autores: Boeseman, M.
In his valuable report on the freshwater fishes of British Guiana, Eigenmann (1912, pp. 64-73) gave a list of the species, together with comparable lists on the freshwater fishes of the adjacent regions. In sharp contrast with the number of 266 species reported from the Essequibo area only, the total amount of Surinam species proved to be but 118! Although since Eigenmann compiled these lists some more species have been reported from Surinam, the general situation has remained essentially the same, clearly showing the backward state of ichthyological research in this area. A possibility to improve our knowledge of this subject came when during the last four years the Rijksmuseum van Natuurlijke Historie received several more or less extensive collections...
Tipo: Article / Letter to the editor
Palavras-chave: 42.81.
Ano: 1952
URL: http://www.repository.naturalis.nl/record/318641

Triodon macropterus versus Triodon bursarius : an attempt to establish the correct name and authorship
Provedor de dados: 16
Autores: Boeseman, M.
A visit to the Leiden Museum by Professor Dr. L. F. de Beaufort, assembling data for his next volume on the Fishes of the Indo-Australian Archipelago, prompted me to investigate the nomenclatorial difficulties still existing around the Plectognath genus Triodon and its single known species. One of the principal items consulted, Herre's 1953 Check List of Philippine Fishes, itself not without serious flaws and therefore illustrative for the present problem, proved a very satisfactory starting-point, especially as it contains the only recent and rather extensive compilation of previous literature on the subject. Still, Herre's enumeration of references is not at all exhaustive, and numerous additions taken both from systematic literature and from general...
Tipo: Article / Letter to the editor
Palavras-chave: 42.81.
Ano: 1962
URL: http://www.repository.naturalis.nl/record/317998

Reviews
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van; Vink, W.; Bakhuizen van den Brink Jr., R.C.; Jacobs, M.
An account of phytochemical substance has been provided by Wiesner’s Rohstoffe des Pflanzenreichs, arranged by products, another account has been given by Karrer, compounds of established constitution arranged according to a chemical system. Though useful, none of these works, including also those of Czapek and Wehmer, aims, however, to use phytochemistry as an auxiliary branch of plant taxonomy. It does seem necessary here to stress in a concise way the importance of the subject for taxonomy. All of us have used some coarse phytochemical characters, looked at characteristic glands and crystals, observed and used colours of dried leaves, tasted plants for bitter substances, sniffed at aromatic oils, and other secondary compounds. The use of these...
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/525545

The Indo-Australian species of the genus Ropalidia (Icaria) (Hymenoptera, Vespidae) (Second Part)
Provedor de dados: 16
Autores: Vecht, J. van der.
CONTENTS Page Introduction................... 3 Subgenus Anthreneida White (supplement to previous revision in "Treubia", vol. 18, 1941).................. 4 Subgenus Paraicaria Gribodo.............. 37 Subgenus Icarielia Dalla Torre.............. 41 Literature................... 71 Index .................... 72 The present paper is to be regarded as a continuation of a revision of the Indo-Australian species of the genus Ropalidia Guérin (= Icaria Saussure), the first part of which was published in Java (van der Vecht, 1941), a few months before the outbreak of the war in the Pacific. That part dealt with the morphology and the distribution of the species which are distinguished by having a more or less distinct raised carina separating the anterior and...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1962
URL: http://www.repository.naturalis.nl/record/317828

Study of a peat profile on the Frisian Coast of the former “Zuiderzee”
Provedor de dados: 16
Autores: Vroman, M.
The subject of this study are soil samples taken in the “Makkumer Waard”, a wide expanse of low-lying land, which follows the Frisian coast. Stratigraphical and palynological investigations showed that in the beginning of the Atlanticum the area lay below the level of the sea, but that gradually the influence of the sea decreased and peat formation became possible. From the transition from marine deposits to Sphagnum peat (— 4,55 m to — 3,50 m) we must conclude that there has been a temporary standstill in the transgression, or even a regression, in the middle of the Atlanticum. Towards the end of the Atlantic period a sudden marine transgression followed, which deposited a layer of sand and clay on the Sphagnum peat (— 3,50 m to — 3,30 m). Shortly before...
Tipo: Article / Letter to the editor
Ano: 1952
URL: http://www.repository.naturalis.nl/record/534829

Two improvements of our taxonomic implements
Provedor de dados: 16
Autores: NN.
In preliminary identification it is very often imminent to hare a look through the dried leaf in order to observe details of nervature, glands, lines, dots, crystals, etc. These are often difficult to observe against the light of a window or the light from the sun. An exceedingly easy, cheap, and satisfactory way is to have an extra cover over the top of the lamp used for bringing light to the subject under the binocular lens, with a circular hole (1½ cm diam) made in the centre of this. The leaf is put over this hole and one looks through it with a normal hand lens. The extra cover we use at Leyden is the metal cap of old jelly containers. The second improvement is the etching of a net of sq. millimetres in the glass bottom of petri dishes, at least in...
Tipo: Article / Letter to the editor
Ano: 1955
URL: http://www.repository.naturalis.nl/record/533008

Dragon Flies of the Genus Zonophora with special reference to its Surinam representatives
Provedor de dados: 16
Autores: Belle, J.
The genus Zonophora, established by DE SELYS (Bull. Acad. Belg. (2) 21, p. 80) in 1854 for BURMEISTER’S Diastatomma campanulata from Brazil, is represented in Surinam by two species only: Z. batesi Selys 1869 and Z. calippus Selys 1869. Both species had already been reported as occurring in Surinam, and have again been collected in this country during my researches since 1955. The species Z. surinamensis NEEDHAM (Trans. Amer. Ent. Soc. 69, 1944, p. 219) was collected in Brazil (Matapaoni), close to the border of Surinam, and may for this reason be encountered in Surinam as well. In 1941 Dr. E. SCHMIDT (D. Entom. Ztschr., p. 76—96) published his “Revision der Gattung Zonophora Selys,” which contained the then known members of the genus Zonophora. However,...
Tipo: Article / Letter to the editor
Ano: 1962
URL: http://www.repository.naturalis.nl/record/506255

Notes on Microturbellaria from freshwater habitats in the Netherlands
Provedor de dados: 16
Autores: Land, J. van der.
INTRODUCTION Freshwater microturbellaria of the Netherlands were studied already by De Man (1874). Since then this subject has not received much attention and much faunistic research remains to be done on this large and interesting group. The present paper deals with material from distribution mains for drinking water in the South and the West of the Netherlands and from a canal in the city of Leiden. A new species of Microdalyellia is described.  MATERIAL AND METHODS The material was taken from the following samples: Sample no. 150. Leiden, Zoeterwoudse Singel (canal), near Koepoortsbrug. Between vegetation (Glyceria); decaying vegetable debris, mainly Glyceria and Aesculus leaves; 10-15 cm deep; temperature above 50 C (there was no ice in the second half...
Tipo: Article / Letter to the editor
Palavras-chave: 42.76.
Ano: 1965
URL: http://www.repository.naturalis.nl/record/318744

[Proceedings of the VII international symposium 'Cultural heritage in geosciences, mining and metallurgy : libraries, archives, museums' : "Museums and their collections" held at the Nationaal Natuurhistorisch Museum Leiden (The Netherlands), 19-23 May, 2003 / Cor F. Winkler Prins and Stephen K. Donovan (editors)]: The Kinker diatom collection: discovery - exploration - exploitation
Provedor de dados: 16
Autores: Sterrenburg, F.A.S.; Wolf, H. de.
Johannes Kinker (1823-1900) was a typical representative of the Victorian 'amateur-savant'. As a wellto-do stockbroker he was able to invest considerable time and money into studies of nature, first entomology and subsequently diatoms. The latter subject flourished in the late 19th century and, among his international contemporaries, Kinker was regarded as "the only Dutch diatomist of renown". There is a marked discrepancy between this reputation in his own time and his complete obscurity since, for which there are two reasons; Kinker did not publish, and his collection was not known to exist. Our discovery of the virtually intact Kinker diatom collection after it had vanished for a century can be regarded as a cultural heritage conservation paradigm; the...
Tipo: Article / Letter to the editor
Palavras-chave: 38.04.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/317313

Notes on the fishes of western New Guinea III. The fresh water shark of Jamoer lake
Provedor de dados: 16
Autores: Boeseman, M.
INTRODUCTION In 1954, during a visit to Hollandia, western New Guinea, it was rumoured that sharks had been observed in the fresh water of Jamoer Lake, at a distance by effluent river of about 130 km from the Arafoera Sea. For further information on the locality, including a map of the area, I refer to the first note in the present series (Boeseman, 1963: 231, fig. 6). With eagerness we welcomed an opportunity provided by Rear Admiral (at the time Captain) G. B. Fortuyn, then Commander-in-Chief Naval Forces Netherlands New Guinea, to pay a short visit to the isolated lake. All necessary facilities, including transportation and maintenance, were kindly furnished by the Royal Netherlands Naval Air Service and the Royal Marines. Accompanied by my colleagues...
Tipo: Article / Letter to the editor
Palavras-chave: 42.81.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/318979

The Morphology of Glyptholaspis Confusa (FOÀ, 1900) (Acarida, Gamasina)
Provedor de dados: 16
Autores: Hammen, L. van der.
Morphology has developed rather differently in each of the large groups of mites. Our knowledge on the subject is nowadays at unequal levels, so that terminology, method, and way of interpretation are difficult to compare. This has resulted at present in a more or less unsurveyable condition of acarology as a whole. It is evident that a comparative acarid morphology is only possible when representatives of each group are studied, described, and figured according to the same method. In order to build up a survey of the mites based on these principles, I recently started a study of the Anactinotrichida according to methods used in oribatology. In 1961 I published an extensive description of a species of Holothyrus, with notes on characters generally...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/317689

On a new species of Denisonia (Reptilia, Serpentes) from New Guinea
Provedor de dados: 16
Autores: Brongersma, L.D.; Knaap-van Meeuwen, M.S.
Until now the Elapid genus Denisonia had not been recorded from New Guinea, and this is remarkable in so far as the genus is known from Australia (and Tasmania) to the south, and from the Solomon Islands to the northeast of New Guinea. It is therefore not very surprising that now evidence has been procured of the presence of the genus in New Guinea. A single specimen of a species that we believe to be new to science was collected at Merauke in southern West New Guinea by Mr. A. J. M. Monsanto in 1959. The genus Denisonia is here accepted in its old sense, such as it was used by Boulenger (1896, p. 332), and by the majority of subsequent authors. Recently, Worrell (1961a; 1961b, pp. 24-26; 1963) has made attempts to divide Denisonia into eight genera, but...
Tipo: Article / Letter to the editor
Palavras-chave: 42.82.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/319018

On a collection of Decapod Crustacea from the Republic of El Salvador (Central America)
Provedor de dados: 16
Autores: Holthuis, L.B.
For about half a year (February-July, 1953) Dr. M. Boeseman, curator of Fishes of the Rijksmuseum van Natuurlijke Historie, was the guest of the Instituto Tropical de Investigaciones Científicas at San Salvador. During this time Dr. Boeseman made extensive collections in numerous localities throughout the Republic of El Salvador and, though his main attention was directed towards the fishes, an interesting collection of Decapod Crustacea was collected and sent home to Leiden. This collection forms the main subject of the present paper. As Dr. G. Kruseman, curator of Insects of the Zoological Museum at Amsterdam, collected some Decapoda in the same region during his stay in El Salvador in the summer of 1952, this material also is included in the present...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1954
URL: http://www.repository.naturalis.nl/record/317674

Revision of Greenidae and related genera (Homoptera, Aphididae)
Provedor de dados: 16
Autores: Ray Chaudhuri, D.N.
The present paper contains the results of studies on the tribe Greenideini of the subfamily Greenideinae Takahashi, 1931, a primitive group of Aphididae mainly restricted to East Asia. Material could be studied of twentyseven species described by previous authors, while seven species had to be described as new. Some changes had to be effected in the systematic arrangement, so that at present six genera (old and new) are recognised in the group, together including five subgenera. In spite of repeated attempts not all the species so far described could be examined, accordingly in a final chapter notes are added on the species that were not available. The project for carrying out research work on Aphididae could be realised through the kind help of Mr. D....
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1956
URL: http://www.repository.naturalis.nl/record/317831

Vocalizations as a conservation tool: an auditory survey of the Andean titi monkey Callicebus oenanthe Thomas, 1924 (Mammalia: Primates: Pitheciidae) at Tarangue, Northern Peru
Provedor de dados: 16
Autores: Aldrich, B.C.; Molleson, L.; Nekaris, K.A.I.
Titi monkeys (Callicebus), morphologically cryptic primates, have been difficult to survey using traditional sighting-based  line transect methods. Callicebus-species regularly engage in loud, ritualized singing bouts, which could allow for the use of  alternate, potentially more accurate call-based survey methods to monitor populations. The Andean titi monkey, C. oenanthe, is  endemic to a small region of northern Peru, an area subject to widespread and rapid deforestation and human colonization. We  conducted a call-based survey of C. oenanthe at Tarangue, a 74 ha private reserve near Moyobamba. Triangulation of calls was used to map groups of titi monkeys on and around the reserve. 73 mapped calls were used to estimate the presence of between three and...
Tipo: Article / Letter to the editor
Palavras-chave: Crypsis; Triangulation; Primates; Tropical Andes; Song; 42.84.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/269614

The dates of publication of Blume’s Flora Javae
Provedor de dados: 16
Autores: Danser, B.H.
The actual dates of publication of the greater part of BLUME’s Flora Javae (lit. 1) appear to be unknown among taxonomists. The title-page of the first volume is dated 1828, and we find the same year at the base of the preface. The volume containing the Orchideae (lit. 2) is dated 1858, but further dates are absent on the work. A cover for a fascicle containing the ”Planches inedites“ in the Groningen University Library is dated 1829, and there are indications that no such cover ever bore a later date. Therefore, perhaps, one often finds 1828, or 1828?, or 1829 as the year of publication of the whole first series. My investigations concerning the actual dates of publication have not yet given me all the information I wished to have, but the main points...
Tipo: Article / Letter to the editor
Ano: 1939
URL: http://www.repository.naturalis.nl/record/525633

Review. Flower morphology, a source of evidence for evolution as a physiological process
Provedor de dados: 16
Autores: Lam, H.J.
Evolution has for a century and a half been the subject of both speculation and research. It has been approached from almost every imaginable side. However, while on the one hand the fossil evidence has provided us with the main lines of development both of characters and of taxa, and on the other comparison of living organisms mutually and experiments of various kinds have given us some insight into the processes which may play a part in the mechanism of evolutionary development, the two methods of research are still separated by a wide gap and in spite of many efforts we are far from understanding what is really happening and what the admittedly necessary connection between the framework and the skin may be. In a recently published book the Swiss...
Tipo: Article / Letter to the editor
Ano: 1955
URL: http://www.repository.naturalis.nl/record/525856

On Rhinoceros simus, Burchell in the Leiden Museum
Provedor de dados: 16
Autores: Jentink, F.A.
According to Dr. P. L. Sclater (Nature, September 25, 1890, p. 520) Mr. F. Selous says in the Field of August 16 as follows: — »it was within a mile of this spot that, two years previously (i. e. in 1888), I shot two white Rhinoceroses Rhinoceros simus), the last of their kind that have been killed (and, perhaps, that ever will be killed) by an Englishman. They were male and female, and I preserved the skin of the head and the skull of the former for the South African Museum in Cape town, where they now are.... To the best of my belief, the great white or square-mouthed Rhinoceros, the largest of modern terrestrial mammals after the Elephant, is on the very verge of extinction, and in the next year or two will become absolutely extinct. If in the near...
Tipo: Article / Letter to the editor
Ano: 1890
URL: http://www.repository.naturalis.nl/record/508391

Review
Provedor de dados: 16
Autores: Ham, R.W.J.M. van der.
This book contains the proceedings of the special tapetum symposium, held during the VIII International Palynological Congress in 1992 (Aix-en-Provence, France). Twelve contributions demonstrate the importance of the tapetum in the reproduction of land plants. As the editors state: any tapetum malfunction causes pollen sterility. All papers deal with basic research, not with applied research such as plant breeding and genetic engineering. Although ‘evolution’ is listed in the title, very little (no special contribution) is devoted to this subject. It is a pity, because a phylogenetic theory has been suggested in the past, which should be treated in a book covering such a highly and diversely specialised structure. A taxonomic survey (table) listing the...
Tipo: Article / Letter to the editor
Ano: 1994
URL: http://www.repository.naturalis.nl/record/525715

Studies in the New World Sapindaceae I. Notes on the genus Talisia aublet
Provedor de dados: 16
Autores: Kramer, K.U.
Since the completion of Radlkofer’s monumental work on the Sapindaceae in Engler’s series “Das Pflanzenreich” 50 years have now elapsed, almost 40 since its publication. It is still the basis of virtually all taxonomic studies in the family. Some of the gerontogean genera have since been the subject of revisional work (Leenhouts 1969, 1971), but for the neogean representatives there are only some regional treatments (e.g. Rambo 1952; Barkley 1957; Reitz 1962; Soukup 1969), apart from descriptions of new taxa scattered through the literature. When studying the taxa native to Suriname in connection with the preparation of a supplement to the family treatment published previously in the “Flora of Suriname” (Uittien 1937) it soon became apparent to me that the...
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/534997

The affinities of Wubana and Allomengea with some notes on the latter genus (Araneae, Linyphiidae)
Provedor de dados: 16
Autores: Helsdingen, P.J. van.
INTRODUCTION Allomengea, formerly known as Mengea, is a well-known genus in northwestern Europe. It is a small genus with only four species, which, though locally abundant, are not at all common. The males are easily recognized by the palp, which is adorned with a bunch of modified spines standing on the tip of a horn-like projection of the cymbium. Because of the long, thin embolus, which corresponds with coiled membraneous tubes in the female vulva, the genus is placed in the tribus Linyphiini 1). The genus appeared to be Holarctic, since Holm (1960) transferred the North American Microneta pinnata Emerton to Allomengea and at the same time published the first records from the extreme northwestern part of the Nearctic Region (Alaska) of Allomengea...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1974
URL: http://www.repository.naturalis.nl/record/319289

The history of some Komodo Dragons (Varanus Komodoensis) captured on Rintja in 1927
Provedor de dados: 16
Autores: Rookmaaker, L.C.
INTRODUCTION The first scientific description of the Komodo Dragon (Varanus komodoensis), given by P. A. Ouwens, appeared only as late as 1912. During some time following this event, but little information on the species became available and no specimens were captured. Only in 1926, an American expedition to the island of Komodo, led by W. D. Burden, for the first time succeeded in capturing alive two Komodo Dragons and in transporting these to the U.S.A. Both animals were received at the New York zoological garden on 11 September 1926. One of the specimens, a male, died on 24 November 1926; the other, of unknown sex, died on 19 October 1926 (Jones, 1965: 92). On 14 October 1926, a male Komodo Dragon was received at the Amsterdam zoological garden. It was...
Tipo: Article / Letter to the editor
Palavras-chave: 42.82.
Ano: 1975
URL: http://www.repository.naturalis.nl/record/318765

A Bibliography of Pelagic Tunicates
Provedor de dados: 16
Autores: Waard-Pouw, G. van; Soest, R.W.M. van.
The present bibliography on pelagic Tunicates has been compiled over a period of 4 years, mainly by the first author. It is meant, not as an official publication, but as a working aid for students of pelagic Tunicates. It comprises about 1300-1400 different titles of books and articles. For obvious reasons the mere listing of all those titles in alphabetical order would be impractical for specialized demands. Splitting this list in as many subheadings as possible in a way like the Zoological Record would be ideal. However, many articles and books are difficult to place under one heading; the same titles would have to be mentioned under a number of different headings. With as many headings as possible this would mean a multiplication of the 1300-1400 titles...
Tipo: Article / Letter to the editor
Ano: 1973
URL: http://www.repository.naturalis.nl/record/506352

Review
Provedor de dados: 16
Autores: Ham, R.W.J.M. van der; Heel, W.A. van.
Secondary pollen presentation is a taxonomically widespread phenomenon that is unknown to many botanists. As defined by the author, it embraces those cases in which pollen is transferred within the flower, and presented to pollinators on or by floral structures other than the thecae. The intraflower transfer often involves intriguing adaptations of petals, androecium and distal parts of the gynoecium. The present book is largely a case of secondary presentation itself, being actually a review of the literature on the subject, supplemented with unpublished data and drawings. The main part (208 pp.) extensively describes familywise all taxa known to have secondary pollen presentation, with many comments inserted. Papaveraceae, Leguminosae, Proteaceae,...
Tipo: Article / Letter to the editor
Ano: 1994
URL: http://www.repository.naturalis.nl/record/525231

On some Indo-westpacific Palaemoninae (Crustacea Decapoda Caridae)
Provedor de dados: 16
Autores: Holthuis, L.B.
Since the publication of my paper on the prawns of the subfamily Palaemoninae collected by the Siboga and Snellius Expeditions (Holthuis, 1950, Siboga Exped., mon. 39a9), I had the opportunity to examine more material of this group, which enabled me to make additions and corrections to the above paper. These additions and corrections are the subject of the present paper. During a visit to the Istituto e Museo di Zoologia della Università at Turin, Italy, I examined the type material of Leander deschampsi Nobili, a species which in 1950 was placed by me among the species incertae. The examination of these types made it possible for me to fix the status of Nobili's species. The collection of the Turin Museum furthermore contained material of Macrobrachium...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1952
URL: http://www.repository.naturalis.nl/record/317991

Reviews
Provedor de dados: 16
Autores: Donk, M.A.; Oort, A.J.P.
During the manufacture of paper living organisms may be the cause of undesirable slime deposits (consisting of bacterial colonies and fungus hyphae) in the machines. An extensive literature on this subject has accumulated and many of these fungus species have been isolated and described. The aim of Mrs. Wang's investigation is not only to determine the species and their frequency in pulp and paper mills in New York State, but also to provide a compendium describing and illustrating the fungus species in order to facilitate their recognition by workers in this field of microbiology and mycology. Following a “Review of Literature” and a chapter on “Materials and Methods” there is a chapter entitled “Results and discussion”. The bulk of the contents, however,...
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/531998

Studies on the Acanthaceae of Thailand
Provedor de dados: 16
Autores: Hansen, Bertel.
After the completion of his large treatment of the Acanthaceae for the Flore de l’Indo-Chine (1935) R. Benoist gave up any further study of the Acanthaceae of S.E. Asia. A very rich and almost unattended material of the family collected in Indochina during the following years accumulated in the Paris herbarium. By this time the well-known, Dutch acanthologist, C.E.B. Bremekamp, commenced studies in the Acanthaceae. For thirty years he published a wealth of papers on the subject until he in the late sixties due to failing eyesight was forced to give up his taxonomic activities. He has identified many of the early collections from Thailand made by Danish botanists and he published a few enumerations containing quite a number of new taxa. Simultaneously after...
Tipo: Article / Letter to the editor
Ano: 1985
URL: http://www.repository.naturalis.nl/record/533068

Vanishing species: things weong between man and nature
Provedor de dados: 16
Autores: Jacobs, M.
Loss of species is the key issue of conservation. Contrary to misuse of land which is visible to anybody with eyes to see, the issue of extinction is sly, treacherous, and open to clear perception only for experts. It touches on quality, and reaches far out in time: hard things to grasp for non-biologists. Thus an extra responsibility devolves on those who are in a position to know and to speak. The value of the genetic resource base has been set forth in e.g. the book by O.H. Frankel &amp; E. Bennett, Genetic resources in plants (1970), and in the BIOTROP symposium edited by J.T. Williams e.a., South East Asian plant genetic resources (1975); Myers adds many striking facts: half the prescriptions in the U.S.A. contain a drug of natural origin. The cardiac...
Tipo: Article / Letter to the editor
Ano: 1980
URL: http://www.repository.naturalis.nl/record/533059

Factors influencing the deterioration of the carapace surface during the moult cycle of Carcinus maenas (Linnaeus, 1758)
Provedor de dados: 16
Autores: Greco, G.; Faimali, M.; Davenport, J.
During its life cycle Carcinus maenas (Decapoda, Portunidae) goes through several phases of the moulting process (ecdysis) which allow it to grow despite having a rigid, non-living outer surface. As an individual approaches ecdysis, the exoskeletal calcium is solubilized (decalcification) from the shell and transferred through the integumentary epithelium to the blood, where much of it is transported to cells, tissues and organs of temporary storage where it is later mobilized for deposition into the new exoskeleton. We hypothesised that the decalcification process caused deterioration of the features and structures (e.g. tubercles and setae) characterizing the crab carapace, but that this can be reversed by moulting. We also tested whether wear and tear...
Tipo: Article / Letter to the editor
Palavras-chave: Antifouling; Crustaceans; Epibiosis; Green crab; Moulting process; SEM; 42.74.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/480051

Spatelmos [Homalia trichomanoides (Hedw.) Schimp.] langs de Dinkel
Provedor de dados: 16
Autores: Weeda, E.J.
The moss Homalia trichomanoides is reported for the valley of the small river Dinkel, where it was discovered in four localities. Probably it has been overlooked sofar and is no recent acquisition. In one station it occurs on lying trunks and branches of Salix cinerea; a ‘relevé’ of the moss vegetation on these is given. It corresponds with moss communities described by Barkman (1958), especially with the Chiloscypho-Mnietum occurring in the freshwater tidal area at the lower course of the great rivers. This adds to other similarities in flora and vegetation between the Dinkel valley and the freshwater tidal area. In three stations Homalia trichomanoides was recorded on the lowermost parts of Quercus robur trunks, less than half a metre above ground level....
Tipo: Article / Letter to the editor
Ano: 1987
URL: http://www.repository.naturalis.nl/record/527340

Revision of the fishes collected by Burger and Von Siebold in Japan
Provedor de dados: 16
Autores: Boeseman, M.
INTRODUCTION The collections made by Burger and Von Siebold during the second quarter of the previous century, in the neighbourhood of Nagasaki, were so extensive that they gave Temminck &amp; Schlegel the opportunity to build the foundation for the knowledge of the Japanese ichthyofauna. In her publication "'s Rijks Museum van Natuurlijke Historie, 1820-1915", Dr. A. Gijzen states: "Burger sent among others fishes"; "25 December 1832 Temminck gives him a list of the desired species of animals." As she further states, Burger's position in Japan is not quite clear; in a letter from 9 November 1839, Temminck writes to the Minister that he knows Burger as a collector only, but that he knows no further particulars about him. Burger's name has been mentioned in...
Tipo: Article / Letter to the editor
Palavras-chave: 42.81.
Ano: 1947
URL: http://www.repository.naturalis.nl/record/317996

Oorsprong en opbouw van de Salix pentandra-populatie op Schiermonnikoog
Provedor de dados: 16
Autores: Ietswaart, J.H.; Offerijns, F.J.M.; Waal, J.H. van der.
The Salix pentandra population on the Dutch Wadden island of Schiermonnikoog has been the subject of this study. Chiefly age class composition and sex ratio have been investigated, as well as the distribution of age and sex over the total range. A hypothesis concerning the origin of S. pentandra on the island is proposed. In about 1920 the first two S. pentandra specimens reached Schiermonnikoog, probably as seed. These were both females, so no sexual reproduction took place at all. Not until 1940 a male specimen came to the island and from 1946 onwards the population started to grow exponentially. At the moment the population of this willow counts c. 900 specimens on the island, mainly growing in the central, moist, fresh dune valleys. The oldest specimen...
Tipo: Article / Letter to the editor
Ano: 1984
URL: http://www.repository.naturalis.nl/record/526939

Experiments on the formation of volcanic cones (In connection with East Indian volcanic islands)
Provedor de dados: 16
Autores: Kuenen, Ph.H.
Several investigators have tackled the problem of the main causes that produce the slopes of volcanic cones, especially with a view to explaining the characteristic concave profiles of strato-volcanoes *). A satisfactory result has not been arrived at, however. This became evident to the present author while studying the submarine slopes of volcanoes in the East Indies. A number of submarine sections of isolated volcanic piles were constructed from the echo-soundings of the Snellius Expedition and from the data contained in the fair sheets of the Hydrographical Survey. These sections combined with the corresponding subaerial profiles will be reproduced in the Scientific Results of “the Snellius Expedition, Volume V: Geology, Part 1: Geological...
Tipo: Article / Letter to the editor
Ano: 1933
URL: http://www.repository.naturalis.nl/record/505966

Multilocus DNA sequencing of the whiskey fungus reveals a continental‐scale speciation pattern
Provedor de dados: 16
Autores: Scott, J.A.; Ewaze, J.O.; Summerbell , R.C.; Arocha-Rosete, Y.; Maharaj, A.; Guardiola, Y.; Saleh, M.; Wong, B.; Bogale, M.; Hara, M.J. O’; Untereiner, W.A.
Baudoinia was described to accommodate a single species, B. compniacensis. Known as the ‘whiskey fungus’, this species is the predominant member of a ubiquitous microbial community known colloquially as ‘warehouse staining’ that develops on outdoor surfaces subject to periodic exposure to ethanolic vapours near distilleries and bakeries. Here we examine 19 strains recovered from environmental samples near industrial settings in North America, South America, the Caribbean, Europe and the Far East. Molecular phylogenetic analysis of a portion of the nucLSU rRNA gene confirms that Baudoinia is a monophyletic lineage within the Teratosphaeriaceae (Capnodiales). Multilocus phylogenetic analysis of nucITS rRNA (ITS1-5.8S-ITS2) and partial nucLSU rRNA,...
Tipo: Article / Letter to the editor
Palavras-chave: Dothideomycetes; Extremophilic fungi; Microcolonial fungi; Molecular phylogenetics; Warehouse staining.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/611850

Herpetological note XIII
Provedor de dados: 16
Autores: Brongersma, L.D.
Pseudothecadactylus nom. nov. In this journal I (Brongersma, 1934, p. 176) described a new genus of gekkonid lizards under the name Torresia. As Dr H. A. Longman, Brisbane, kindly pointed out to me this name is preoccupied by Torresia Castelnau, 1875 (cf. D. S. Jordan, The Genera of Fishes, part III, 1919, p. 378). The genus of gekkonid lizards may now be named: Pseudothecadactylus, type of genus: Thecadactylus australis Gthr., 1877. For the description I may refer to my previous paper on this subject. Dendroaspis Schlegel In recent literature on African herpetology it is usual to give the name Dendraspis Schlegel to a genus of snakes of which Elaps jamesoni Traill, 1843, is the type. Schlegel (1848?, p. 5), however, gave the name Dendroaspis to this...
Tipo: Article / Letter to the editor
Palavras-chave: 42.82.
Ano: 1936
URL: http://www.repository.naturalis.nl/record/318615

On the formation of Caldera’s
Provedor de dados: 16
Autores: Escher, B.G.
In two previous publications (bibl. 1 and 2) I have brought the formation of calderas into relation with the gas phase, observed by Perret during the eruption of Vesuvius in 1906 (bibl. 3). In these papers I arrived at the conclusion that during the gas phase a cylinder is cored out, and that this may be the cause of caldera formation. In the first paper the subject was treated geometrically, while in the second calculations were made of a particular case (the Krakatoa eruption of 1883) to see if they would bear out this theory. This caldera-formation, however, is not a typical case, as there must previously have been an older Krakatoa-caldera, and in Aug. 1883 it was not a large portion of the volcanic cone that disappeared, but only an island which...
Tipo: Article / Letter to the editor
Ano: 1928
URL: http://www.repository.naturalis.nl/record/506022

Synopsis of the NW European microlepidoptera with special reference to the ecology and taxonomy of the Dutch species. Part 1. Introduction and Pyralidae (Galleriinae)
Provedor de dados: 16
Autores: Kuchlein, J.H.
INTRODUCTION The present work is intended to give a treatment of the taxonomy and ecology of the Microlepidoptera found in northwest Europe. Until now no study has been published covering especially this part of Europe. Special attention will be paid to the species observed in The Netherlands. In 1851 the first annotated list of the Dutch Microlepidoptera compiled by H. W. de Graaf appeared in the first volume of the 'Bouwstoffen voor eene Fauna van Nederland'. In the third volume of that work (1859-1866), partly in co-operation with P. C. T. Snellen (1866), the same author published a completely revised list of Dutch Microlepidoptera. This list appeared between 1859 and 1866. In 1882, Snellen's outstanding work, 'De Vlinders van Nederland,...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1978
URL: http://www.repository.naturalis.nl/record/317225

A revised classification of the mites (Arachnidea, Acarida) with diagnoses, a key, and notes on phylogeny
Provedor de dados: 16
Autores: Hammen, L. van der.
INTRODUCTION In 1961 I published a paper on a species of the genus Holothyrus, in which I paid also some attention to the general classification of the mites. Before that time I had chiefly studied Oribatid mites, and I was surprised by the neglect of important discoveries made in the field of Oribatid morphology by specialists of other groups. I realized that a comparative study of acarid morphology was badly needed, and that this could be the only base for a satisfactory general classification. I continued and developed this idea, and in the course of ten years I investigated, in a more or less detailed way, representatives of all groups of mites. In this way I published papers on Opilioacarida (Van der Hammen, 1966, 1968a, 1968b, 1969b, 1971),...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1972
URL: http://www.repository.naturalis.nl/record/318895

Reviews
Provedor de dados: 16
Autores: NN.
BRUENIG, E.F. 1996. Conservation and management of tropical rainforests. An integrated approach to sustainability. 352 pp., illus. CAB International, Wallingford, Oxon 0X10 8DE, United Kingdom. ISBN 0-85198-994-2. Hardcover. Price: US$ 99, £ 55. This is the? ultimate masterpiece of Eberhardt Bruenig. In this work he evaluates the tropical rainforest ecosystem, all its different kinds of being used, the way in which it is possible to harvest the rainforest for timber, the principles and strategies of sustainability, ete. He also gives attention to the traditional customary rights of the indigenous peoples, and the many pitfalls surrounding these rights. Restoration of degraded ecosystems is one of the chapters, as well as short rotation tree plantations,...
Tipo: Article / Letter to the editor
Ano: 1997
URL: http://www.repository.naturalis.nl/record/533047

Notes on South American catfishes, including remarks on Valenciennes And Bleeker types in the Leiden Museum
Provedor de dados: 16
Autores: Boeseman, M.
I A recent perusal of Valenciennes' accounts on the nematognathous fishes (Valenciennes in Cuvier &amp; Valenciennes, 1839, 1840) showed that of the numerous South American species newly described or renamed, eighteen wholly or partly were based on specimens in the collection of the Rijksmuseum van Natuurlijke Historie at Leiden. It was surprising to find that most of these specimens are stated to have been sent to Leiden from Cayenne, and only a few from Surinam, for most of the pre-1839 South American catfishes in the Leiden Museum are of Surinam origin and few, if any, from Cayenne. Moreover, an examination of the collection showed that up to recently none of the specimens belonging to the pertinent species bear any indication as to a typical status. On...
Tipo: Article / Letter to the editor
Palavras-chave: 42.81.
Ano: 1972
URL: http://www.repository.naturalis.nl/record/318198

The late Pliocene Equidae of Langebaanweg, Cape Province, South Africa
Provedor de dados: 16
Autores: Hooijer, D.A.
Introduction................... 3 The Hipparion skull from Έ'Quarry............ 6 The upper dentition from Έ' Quarry............ 12 The mandibles from Έ' Quarry.............. 19 The lower dentition from Έ' Quarry............ 20 Lower premolars from a site between Έ' and 'C' Quarries...... 26 Metapodials from Έ' Quarry.............. 26 Proximal phalanx from Έ' Quarry............. 28 Further postcranial bones from Έ 'Quarry.......... 29 Hipparion from Έ' Quarry and Baard's Quarry compared....... 30 Equus from Baard's Quarry.............. 33 How many species of Hipparion are represented at Langebaanweg?.............. 34 Conclusion................... 36 Summary................... 37 Acknowledgements................. 37 References................... 38...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.84.
Ano: 1976
URL: http://www.repository.naturalis.nl/record/317735

The decapod and stomatopod Crustacea of St Paul's Rocks
Provedor de dados: 16
Autores: Holthuis, L.B.
INTRODUCTION Saint Paul's Rocks (Penedos de São Pedro e São Paulo) are a small group of rocky islets on the mid-Atlantic ridge near the equator, occupying an area of roughly 250 by 425 m. There is no vegetation and, apart from birds and invertebrates, the islands are uninhabited. The Cambridge Expedition to Saint Paul's Rocks visited the group from 16 to 24 September 1979 and made extensive collections of the terrestrial and marine fauna; these included a number of Crustacea. The Decapoda and Stomatopoda of St Paul's Rocks are the subject of the present paper. Few detailed studies have been published to date on the Crustacea of St Paul's Rocks, largely because of the Rocks' remoteness and inhospitable nature. Crustacea, especially the common and...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1980
URL: http://www.repository.naturalis.nl/record/318571

Concise survey of localities and collection numbers of zoological and botanical specimens, collected by the Netherlands biological expedition to Turkey 1959
Provedor de dados: 16
Autores: [Anonymous].
I. INTRODUCTION In the spring of 1959 E. Hennipman, P. Nijhoff, C. Swennen, A. S. Tulp, W. J. M. Vader and W. J. J. O. de Wilde made a biological collecting expedition to Turkey. The record of this journey of the "Nederlandse Biologische Expeditie Turkije 1959" appeared in "De Levende Natuur" vol. 64, supplement to no. 5 (1961). Here follows a condensed description of the localities where material was collected as well as a list of collection numbers of the zoological and botanical specimens. The route followed by the expedition is indicated on map 1, on which are also indicated the areas shown in the more detailed maps 2, 3, 4 and 5. Since, on the one hand, geographical names in Turkey are subject to alterations and on the other certain names are used...
Tipo: Article / Letter to the editor
Palavras-chave: 42.65.
Ano: 1963
URL: http://www.repository.naturalis.nl/record/318329

Indian species of Commelinaceae. Miscellaneous notes II
Provedor de dados: 16
Autores: Rao, Rolla Seshagiri.
While checking up a few doubtful points on the following Indian species of Commelinaceae in different herbaria in the United Kingdom, with the background of the data gathered from the herbaria in the Continent and in India, some interesting details have been made out by the writer during August, 1964 for clarifying the status of those species. He is thankful to the authorities of the herbaria at the Royal Botanic Gardens of Edinburgh and Kew, Department of Botany, University of Glasgow, and the British Museum (Natural History) and the Linnean Society of London, and also the Rijksherbarium, Leiden, Institute of Systematic Botany, Utrecht, Naturhistorisches Museum, Wien, and Botanisches Institut, Wien for their kind help and co-operation in allowing the...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/525477

Early stages of the "Ceracidae" (Lepidoptera), with remarks on the true position of the group
Provedor de dados: 16
Autores: Diakonoff, A.
The superfamily Tortricoidea, the so-called leaf-rollers, contains a group of exceptionally large and conspicuously coloured species, forming the chiefly Central Asiatic Cerace group. Superficially these species do not resemble other leaf-rollers very closely. Consequently several authors placed them incorrectly: Butler (1881), Warren (1888) and Cotes (1889) in the Lithosiidae, Snellen (1903) in the Tineidae, Meyrick (1907) originally in the Plutellidae. But Walker (1863) and also Moore (1888) recognised their Tortricoid character and later also Meyrick (1908) came to the same conclusion. However, the true systematic position of the Cerace group within the superfamily Tortricoidea appeared to be even more puzzling, and subject to considerable controversy....
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/318148

New records of mammals from the middle pleistocene of Sangiran, central Java
Provedor de dados: 16
Autores: Hooijer, D.A.
Collections of fossil vertebrate remains from the Sangiran area in Java have recently been presented to the Rijksmuseum van Natuurlijke Historie by Mr. H. R. van Heekeren and by Mr. J. H. Houbolt. They form a most welcome addition to the Museum collection of fossil vertebrates made by Eugene Dubois in Java in the 189o's; Sangiran is a site known to but not collected at by Dubois. We are grateful to Messrs. Van Heekeren and Houbolt for their generous gift to the Museum; the more important specimens in the Sangiran collection will be the subject of the present note. The Sangiran dome (for the geology of the area see Van Es, 1931: 55-68, and Von Koenigswald, 1940: 26-39), situated approximately 12 km north of Solo (Soerakarta) between the Kali Brangkal and...
Tipo: Article / Letter to the editor
Palavras-chave: 38.22; 42.84.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/318494

Vertebral number is highly evolvable in salamanders and newts (family Salamandridae) and variably associated with climatic parameters
Provedor de dados: 16
Autores: Arntzen, J.W.; Beukema, W.; Galis, F.; Ivanović, A.
In vertebrates, the relative proportion of the number of trunk and caudal vertebrae is an important determinant of body shape. While among amphibians frogs and toads show low variation in vertebrae numbers, in salamanders the numbers of trunk and caudal vertebrae vary widely, giving rise to phenotypes in the range from short-bodied and long-tailed to long-bodied and short-tailed. We analysed vertebral numbers in the family Salamandridae in a phylogenetic context and calculated the relationship between vertebral changes and changes in climate and other environmental parameters. A significant association was found between morphological change with precipitation and temperature. However, annual precipitation affected the two main groups of salamandrid...
Tipo: Article / Letter to the editor
Palavras-chave: Ancestral character states; Body shape; Climatic niche; Comparative method; Phylogeny; Vertebral column; 42.82.
Ano: 2015
URL: http://www.repository.naturalis.nl/record/533923

Generic circumscriptions in Geoglossomycetes
Provedor de dados: 16
Autores: Hustad, V.P.; Miller, A.N.; Dentinger, B.T.M.; Cannon, P.F.
The class Geoglossomycetes is a recently created class of Ascomycota, currently comprised of one family (Geoglossaceae) and five genera (Geoglossum, Nothomitra, Sarcoleotia, Thuemenidium and Trichoglossum). These fungi, commonly known as earth tongues, have long been a subject of mycological research. However, the taxonomy within the group has historically been hindered by the lack of reliable morphological characters, uncertain ecological associations, and the inability to grow these fungi in culture. The phylogenetic relationships of Geoglossomycetes were investigated by conducting maximum likelihood and Bayesian analyses using a 4-gene dataset (ITS, LSU, MCM7, RPB1). Five well-supported monophyletic clades were found that did not correspond exactly with...
Tipo: Article / Letter to the editor
Palavras-chave: Ascomycota; Earth tongues; Geoglossum; Microglossum; Phylogenetics; Systematics.
Ano: 2013
URL: http://www.repository.naturalis.nl/record/532273

Some notes on Mimosa invisa Maer. and its var. inermis. Is the latter poisonous for cattle?
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van.
In 1909 Mimosa invisa was found first in Malesia by Dr. G. Roepke, then attached to the Central Experiment Station at Salatiga, Central Java, who spotted this American weed introduced on Mt Lawu. He used it for groundcover in some estates and since that time it became very popular and common, up to c. 600 m over Java. It shows a vigorous growth forming dense thickets at the expense of other plants which are suffocated and suppressed. In areas subject to a strong dry season it is limited to moist depressions and streambanks, under everwet climatic conditions it is found in abundance in the same moist places but also in dryland localities (1). It is also very common in Sumatra and it was especiallyutilized in the tobacco fields in Deli as a groundcover (and...
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/532782

Definition of the concept ’Inflorescence’, with special reference to Ligneous Plants
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van.
A colloquium at the Rijksherbarium, Leyden, on September 27, 1962, held by Dr. P. Weberling, Mainz, on the subject of the interpretation of the inflorescence according to Prof. Troll’s ideas, stimulated me to reconsider this concept. It appears to me that the term inflorescence, as for example defined in Jackson’s Glossary as ”the disposition of flowers on the floral axis” is a merely phytographical concept. If it is attributed more than purely descriptive value, it should have a morphological basis. In the descriptive sense it is morphologically confusing. We call the inflorescence of Ananas or Sphenoclea a spike, but we define the flowering parts of Melaleuca, Callistemon, or Pentraphylax also as spikes, which they are, but merely by superficial...
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/532890

Reviews and notices
Provedor de dados: 16
Autores: NN.
ASHTON, Peter &amp; Mary (ed.), The quaternary era in Malesia, being the Transactions of the Second Aberdeen-Hull Symposium on Malesian Ecology, Aberdeen 1971, 122 pp. (Dept. of Geography, Univ. of Hull, 1972). A paper to elucidate the late-Tertiary history was delivered by J. Muller. The era itself is the subject of papers by P.S. Ashton, by J.R. Flenley (see Bibliography), and by Lord Medway on the animals. Plenty of maps, pollen diagrams, and references are given; the discussions, long and high-level, have been recorded. The ’Epilogue’ gives a fine summary of the Quaternary era, here copied: ”Though this review emphasises how fragmentary our knowledge of the Quaternary history of South-east Asia is, it nevertheless presents what are probably all the...
Tipo: Article / Letter to the editor
Ano: 1976
URL: http://www.repository.naturalis.nl/record/533139

Orthopterological notes IV Notes on Indomalayan and African Pterophyl-Linae (Tettigoniidae)
Provedor de dados: 16
Autores: Jong, C. de.
The present paper contains a number of new facts concerning Indomalayan Pterophyllinae, which came to my attention after the publication of my first paper on this subfamily (De Jong, 1938 1))· Further it contains the description of new species: Cymatomera blötei and Tegrolcinia karnyi, an allotype: ♂ Olcinia dentata De Jong, three plesioallotypes: ♂ Phyllomimus punctiger Karny, ♀ Tympanoptera annulata Karny, and ♂ Heteraprium inversum (Brunner v. Watt.), and it gives more details about a number of genera and their interrelation, e.g., Morsimus Stål and allied genera. More details are also given of a number of species hitherto insufficiently known, indomalayan as well as african species. Moreover, some material is mentioned which I identified for other...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1960
URL: http://www.repository.naturalis.nl/record/317667

Biology and distribution of Gammarus aequicauda and G. insensibilis (Crustacea, Amphipoda) in the lagoon system of Bages-Sigean (France)
Provedor de dados: 16
Autores: Janssen, Hans; Scheepmaker, Maarten; Couwelaar, Matthijs van; Pinkster, Sjouk.
1. Gammarus aequicauda (Martynov, 1931) and Gammarus insensibilis Stock, 1966 have been the subject of a quantitative ecological research project in the lagoon system of Bages-Sigean (France, dépt. Aude). From April 1976 till August 1977 samples have been taken at 31 different stations all over the lagoon at intervals of about 2 weeks. With the samples thus obtained we studied the biology and distribution of the two species in relation to environmental factors, the most important being chlorinity and temperature. 2. Both species reproduce throughout the year and have a regular reproductive pattern with maxima in spring and autumn. In G. aequicauda. as compared to the other species, this peak is earlier in spring and later in autumn. This is caused by a...
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/504129

Morphology and DNA sequence data reveal the presence of Globodera ellingtonae in the Andean region
Provedor de dados: 16
Autores: Lax, P.; Rondan Dueñas, J.C.; Franco-Ponce, J.; Gardenal, C.N.; Doucet, M.E.
Potato cyst nematodes, G. rostochiensis and G. pallida, are the most economically important nematode pests of potatoes worldwide and are subject to strict quarantine regulations in many countries. Globodera ellingtonae was recently described from Oregon (USA), with its host-plant in the field being still unknown. Roots of Andean potatoes from the North of Argentina have been found attacked by this nematode, providing further evidence that this is a potato cyst nematode species, along with G. pallida and G. rostochiensis. New information about morphological, biological and molecular aspects of G. ellingtonae is provided for diagnostic purposes. The Argentine population showed morphological differences from specimens from Oregon; therefore, new diagnostic...
Tipo: Article / Letter to the editor
Palavras-chave: Andean potato; Argentina; Diagnosis; Hsp90 gene; Morphology; Potato cyst nematode; 42.76; 42.64.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/506790

Notes on the collection of land-mollusca made by Dr. E . Jacobson on the Islands of Simalur and Babi in 1913, with descriptions of new species and races
Provedor de dados: 16
Autores: Laidlaw, F.F.
I am indebted to the authorities of the Leiden Museum for the opportunity of examining and reporting on the large collection made by the late Dr. E. Jacobson on Simalur island and on its smaller satellite Pulau Babi, in 1913, between the months of January and September. The collection is large enough to enable one to study good series of a number of the forms collected, and to justify the naming of several new races. Some new forms had already been named by Dr. C. A. van der Willigen, who studied the collection several years ago. Whenever possible I adopted Dr. van der Willigen's MS names. It is now possible to compare the faunas of Simalur Is., Nias Is., and Enggano Is., but the fauna of the Mentawi islands is unfortunately still very imperfectly known. I...
Tipo: Article / Letter to the editor
Palavras-chave: 42.73.
Ano: 1957
URL: http://www.repository.naturalis.nl/record/318374

On some Hymenoptera from the collection of Guerin-Méneville in the Leiden museum
Provedor de dados: 16
Autores: Vecht, J. van der.
About thirty years ago, while studying the Sphecinae of the Leiden Museum, I found two species of Sphex, described by F. E. Guérin-Méneville, represented here by specimens originating from the collection of this author. A note on these species, Sphex lanierii Guérin and Sphex paulinieri Guérin, was published a few years ago (van der Vecht, 1954). Recently I came across a few more specimens from the same origin, and this has stimulated me to make a thorough search in the entire collection of Hymenoptera in this Museum. Since this work has led to the discovery of a few types which have generally been regarded as lost, the results appear to be well worth publication. According to Horn &amp; Kahle (1935-7), the Hymenoptera of GuérinMéneville, who died in 1874,...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1957
URL: http://www.repository.naturalis.nl/record/317915

The Lindsaeoid ferns of the Old World III. Notes on Lindsaea and Sphenomeris in the Flora Malesiana Area
Provedor de dados: 16
Autores: Kramer, K.U.
In the Flora Malesiana area recent authors have distinguished the following genera in the Lindsaea group of ferns: Isoloma J. Smith, Lindsaea Dryander (often misspelled “Lindsaya”; see Copeland 1947, p. 53, and Kramer 1957a, p. 156), Odontosoria Fee, Protolindsaya Copeland, Schizoloma Gaudichaud (or Schizolegnia Alston), Sphenomeris Maxon, Tapeinidium (Presl) C. Christensen, and Xyropteris Kramer. In my account of the American species (Kramer 1957a) I included the Asiatic genus Schizolepton Fee in the Lindsaea group, on Copeland’s authority, without sufficiently looking into the matter. Holttum (1958) has shown since that its affinities are with Syngramma and has subsequently (1960) combined it with Taenitis, although Pichi-Sermolli (1966) denies any close...
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/524910

The cerceris species of Java (Hymenoptera Sphecoidea)
Provedor de dados: 16
Autores: Vecht, J. van der.
The genus Cerceris Latreille contains several hundreds of species and is represented in all zoological regions, in temperate areas as well as in the tropics and subtropics. In 1942 Arnold stated that about 650 specific names had been proposed in this genus; since then another 125 new species have been described. The species of certain parts of the world are well known. In recent years De Beaumont (1950, 1951, 1958) and others have published some important revisions of the species of Europe and North Africa, while Tsuneki (1961) studied the species of North Eastern Asia (for further references see pp. 19-21 of Tsuneki's paper). The Ethiopian Cerceris have been monographed by Brauns (1926) and by Arnold (1931, 1942). The species of the Nearctic region have...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1964
URL: http://www.repository.naturalis.nl/record/318041

Aspects of the ecology of mosquitoes in Surinam
Provedor de dados: 16
Autores: Kruijf, H.A.M. de.
For about two years (1967—1968) investigations were conducted on the ecology of mosquitoes in relation to the transmission of arboviruses in Surinam (DE KRUIJF 1970). Part of this study dealing with the daily activity of biting mosquitoes is presented here. Daily activity of biting anopheline females has been widely studied because of their ability to transmit malaria (MATTINGLY 1949, SENIOR-WHITE 1953, GILLIES 1957, SLOOFF 1964, and many others). Intensive studies on culicine mosquitoes transmitting arboviruses and other pathogen agents have been carried out in Africa and elsewhere (among many others HADDOW 1945, 1954, 1956, 1961a and b, 1961, MCCLELLAND 1960, BOORMAN 1961, SAMARAWICKRAMA 1967, TAYLOR &amp; JONES 1969). Data on the diel activity of...
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/506285

Notes on Southeast Asian Porcupines (Hystricidae, Rodentia). IV. On the taxonomy of the subgenus Acanthion F. Cuvier, 1823 with notes on the other taxa of the family
Provedor de dados: 16
Autores: Weers, D.J. van.
Arguments are presented to demonstrate that Lyon’s (1907) division of the Old World porcupines, family Flystricidae, into two subfamilies is superfluous and provides a distorted classification. Evidence is presented for the point of view that the generic status of Thecurus Lyon, 1907 has been based on quite insufficient arguments, and this taxon is not accorded a higher rank than that of a subgenus. Only three genera are recognized in this family: Trichys Günther, 1877, Atherurus F. Cuvier, 1829, and Hystrix Linnaeus, 1758 with the subgenera Hystrix s.s., Acanthion F. Cuvier, 1823 and Thecurus Lyon, 1907. Data about some south-western Asiatic specimens of Hystrix indica Kerr, 1792 are presented. The main subject of the present paper is the specific...
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/504738

Some notes on Charophyta collected in the Netherlands West Indies, North Venezuela and Columbia
Provedor de dados: 16
Autores: Zaneveld, J.S.
As far as I know, only three papers are dealing with Charophyta of the Netherlands West Indies. In 1858, in “Monatsbericht der königlichen Akademie der Wissenschaften, Berlin”, BRAUN records two species from Paramaribo, viz. Nitella microcarpa A. BR. and Chara hydropitys REICHENB. ap. MOESSL. These species are also enumerated in the “Fragmente einer Monographie der Characeen” (BRAUN &amp; NORDSTEDT, 1882), in which another species is recorded from Curaçao, viz. Chara gymnopus A. Br. f. curassavica A. BR., now to be named Chara zeylanica Willd. f. curassavica (A. BR.) H. et J. GROVES. The third paper is that of H. and J. GROVES in URBAN’s Symbolae Antillanae (1911), in which the last-named species is once more recorded. In 1930 Mr P. WAGENAAR HUMMELINCK...
Tipo: Article / Letter to the editor
Ano: 1942
URL: http://www.repository.naturalis.nl/record/535212

Floral Ontogeny in Scirpus, Eriophorum and Dulichium (Cyperaceae), with Special Reference to the Perianth
Provedor de dados: 16
Autores: Vrijdaghs, A.; Caris, P.; Goetghebeur, P.; Smets, E.
Background and Aims Based on molecular phylogenetic analysis, it has been suggested recently that the Cyperaceae comprises only two subfamilies: the Mapanioideae and the Cyperoideae. In most flowers of the Cyperoideae, the whorl of inner stamens is reduced, resulting in tetracyclic flowers. In the more primitive (scirpoid) genera within the Cyperoideae, the perianth consists of two polysymmetric whorls, whereas the perianth parts in the more derived genera have been subject to modifications and/or reduction. Comparative studies of the many silky hairs of Eriophorum and of the eight bristles of Dulichium have given rise to much discussion about their homology.  Methods The spikelet and floral ontogeny in freshly collected inflorescences was investigated...
Tipo: Article / Letter to the editor
Palavras-chave: Dulichium arundinaceum (L.) Britton; Eriophorum latifolium Hoppe; Floral ontogeny; Perianth; Scirpoid flower; Scirpus sylvaticus L; Scanning electron microscopy.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/407290

On some Brenthidae collected by Mr. J. D. Pasteur in Hava
Provedor de dados: 16
Autores: Senna, Angelo.
Lately I have had the pleasure to receive an interesting collection of Brenthidae from West Java, very kindly offered to me by Mr. J. D. Pasteur to whom I here wish to express my sincere thanks. In the letter accompanying this valuable lot of specimens, Mr. Pasteur gives some remarks on the coloured lines and spots of the elytra in living Brenthidae and says: »Les taches jaunes sont toujours d’un jaune très clair (jaune de paille ou bien de gomme gutte) faisant un vif contraste avec la couleur laque noire des élytres; aussitôt que l’insecte est desséché ces taches jaunes deviennent d’une couleur fade, brune claire ou même foncée.” In my note: Enumeration of the species known as yet from Java 1), treating of Eutrachelus Temmincki Latr., I wrote: »this...
Tipo: Article / Letter to the editor
Ano: 1898
URL: http://www.repository.naturalis.nl/record/508381

On a collection of reptiles from Nias, and on Calamaria virgulata, Boie
Provedor de dados: 16
Autores: Lidth de Jeude, Th.W. van.
Some months ago a collection of Reptiles from Nias was presented to our Museum by Mr. J. D. Pasteur. The collection, though not a very large one, is of much importance to our Museum as up to this date no Reptiles from Nias were found in our collections. The Erpetology of the isle of Nias has already formed the subject of three papers, viz.: 1° a paper by the late Dr. J. G. Fischer 1), 2° a list published by Mr. G. A. Boulenger 2) and 3° Mr. E. Modigliani’s paper on the Fauna erpetologica of the isle of Nias 3). To the enumeration and the description of the Reptiles collected by Mr. Modigliani himself he adds a list of all the Reptiles of the isle of Nias mentioned by Fischer and Boulenger as well as by himself. This list contains 43 species and though our...
Tipo: Article / Letter to the editor
Ano: 1890
URL: http://www.repository.naturalis.nl/record/508997

Systematic notes on Asian birds. 21. Babbler jungle: a re-evaluation of the ‘pyrrogenys’ group of Asian pellorneines (Timaliidae)
Provedor de dados: 16
Autores: Wells, D.R.; Andrew, P.; Berg, A.B. van den.
The taxonomy of the jungle babblers, Delacour’s tribe Pellorneini, has long been subject to reversals of opinion, suggestive of a still-poor understanding of natural relationships. At the unstable boundary of genera Trichastoma and Pellorneum, groups of taxa usually taken to comprise a continental species tickelli and an insular species pyrrogenys have shifted from positions in separate genera to being neighbours in first one and then the other of these two. A fresh morphological analysis and newly described vocalizations show them to be one another’s probable closest relative, potentially conspecific but due to limitations on the allowable use of vocalization evidence among allopatric populations, for the time being at least, kept as separate entities....
Tipo: Article / Letter to the editor
Palavras-chave: Taxonomy; Species-limits; Vocalizations; Babbler; Pellorneini; Trichastoma; Pellorneum; 42.83.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/219937

Review
Provedor de dados: 16
Autores: Hartog, C. den.
In the eyes of most aquarists plants have merely a decorative function in the aquarium. Several aquarists, however, have made the plants the subject of their special interest, and it is for these people that Professor De Wit actually wrote his book. In order to make it easier for them he has not followed the usual systematic arrangement of the species but has arranged the species according to their habit. The following growthforms are dealt with successively: 1. Plants freely floating on the surface; 2. Submerged but freely floating plants; 3. Rooting plants with rosettes of filiform, linear, or ribbon-shaped leaves; 4. Plants with leaf-rosettes on the bottom; 5. Rooting plants with floating leaves; 6. Plants with creeping stems and erect leaves; and 7....
Tipo: Article / Letter to the editor
Ano: 1967
URL: http://www.repository.naturalis.nl/record/524819

Book reviews
Provedor de dados: 16
Autores: NN.
This book is dedicated to the world-known specialist in marine mycology, E. B. Gareth Jones on the occasion of his 65th birthday, for his substantial contribution to marine mycology. It contains 22 contributions by a multitude of authors, grouped around the central theme of Fungi in marine environments. The book is divided into three parts. Part 1 (organisms), contains contributions on fungal species: taxonomy, based on morphology as well as molecular characters, treating groups like the Oomycete genus Halophytophtora, and ascomycete groups like de Halosphaeriales, Loculoascomycetes, Lophiostoma and Massarina, as well as marine yeasts, and a contribution on anamorphteleomorph connections in marine ascomycetes. Part 2 is devoted to ecology, mainly to...
Tipo: Article / Letter to the editor
Ano: 2003
URL: http://www.repository.naturalis.nl/record/532448

A review of the new genus Anischnogaster in the Papuan region (Hymenoptera, Vespidae)
Provedor de dados: 16
Autores: Vecht, J. van der.
The Stenogastrinae, a group of subsocial wasps currently regarded as a subfamily of the Vespidae (Richards, 1962: 4), have a remarkable distribution. Most of the species are inhabitants of the Oriental region, where their range extends from Southern India eastward to the Philippine Islands, Celebes, Sumba and Flores. No Stenogastrinae have ever been collected in the Moluccas, but the group is well represented in the Papuan area, occurring throughout New Guinea and in the neighbouring islands of Waigeo, Misool and Aru. From 1831 to 1913 nine species have been described from this area, but from examination of the types we have learned that only six of these may be regarded as good species. Various collections made in New Guinea during the last forty years...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1972
URL: http://www.repository.naturalis.nl/record/317906

On some Oncomerini from New Guinea (Heteroptera, Pentatomidae)
Provedor de dados: 16
Autores: Blöte, H.C.
In the course of the later years a rather large number of specimens of various groups of insects from New Guinea were among the acquisitions of the Rijksmuseum van Natuurlijke Historie. Shortly after the war the collections made by Professor H. Boschma, during his visit to the Wissel Lakes in 1939 as the zoologist of the expedition organized by the Royal Netherlands Geographical Society (Koninklijk Nederlandsch Aardrijkskundig Genootschap), arrived safely from Bogor (Java) where they had to stay during the German occupation of the Netherlands. Quite recently we obtained the first captures made by Dr. L. D. Brongersma in various places in and near New Guinea. From both collections a number of new and interesting Heteroptera is to be described. A few...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1952
URL: http://www.repository.naturalis.nl/record/319377

Notes on the scientific career of Professor Dr. L. D. Brongersma, compiled at the occasion of his sixty fifth birthday
Provedor de dados: 16
Autores: Boschma, H.
For a large part the data in the present paper are based on manuscript notes in the Rijksmuseum van Natuurlijke Historie at Leiden, assembled by Brongersma himself; they form only a brief account of his scientific achievements. Efforts to completeness were only made in the composition of the List of Publications; here besides the scientific papers those with popular contents are listed. Thanks are due to Dr. W. Vervoort and to Dr. M. Boeseman for constructive remarks. Leo Daniël Brongersma was born on May 17th, 1907, at Bloemendaal (province of North-Holland); here he attended elementary school, while he went to high school in the neighbouring town of Haarlem. From 1925 to 1931 he studied zoology, botany and geology at the Municipal University of...
Tipo: Article / Letter to the editor
Palavras-chave: 42.01; 42.82.
Ano: 1972
URL: http://www.repository.naturalis.nl/record/318616

Genetic differentiation, origin and dispersal of Gammarus gauthieri from the Iberian peninsula and North Africa (Crustacea, Amphipoda)
Provedor de dados: 16
Autores: Scheepmaker, Maarten.
Genetic differentiation among population samples of G. gauthieri on both sides of the Strait of Gibraltar was investigated by enzyme electrophoresis at 20 enzyme loci with reference to G. gauthieri and G. ibericus from different areas in the Iberian peninsula. Levels of divergence resolved suggest that G. gauthieri reached North Africa from the Iberian peninsula, and not vice versa. With reference to geological evidence, this was likely to occur during the Messinian (6—5 My ago). As the opening of the Strait of Gibraltar represents a well dated geological event, an attempt has been made to calibrate the molecular clock for the G. pulex-group. Indirect estimations of gene flow levels were shown to be extremely low. Probably as a consequence of frequently...
Tipo: Article / Letter to the editor
Palavras-chave: Distribution; Genetic divergence; Gene flow; Molecular clock; Gammarus.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/503962

A new fresh-water prawn of the genus Macrobrachium (Crustacea Decapoda, Caridea) from Madagascar
Provedor de dados: 16
Autores: Holthuis, L.B.
Due to the kindness of Mr. Y. Therezien, Ingénieur-hydrobiologiste of the Centre Technique Forestier Tropical at Tananarive, Madagascar, the Rijksmuseum van Natuurlijke Historie received at several occasions freshwater Crustacea from Madagascar. Two previous reports (Holthuis, 1964, 1965) dealt with the crayfishes and the atyid shrimps of these collections. Among the fresh-water Palaemonid prawns a new species of Macrobrachium was found, which is the subject of the present note. It is a great pleasure to dedicate this beautiful species to Mr. Therezien. Macrobrachium therezieni new species River of Maningory, Fénérive district, Tamatave province, eastern Madagascar; 16 February 1961; Y. Therezien, no. 9. — 1 adult male (holotype); Rijksmuseum van...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1965
URL: http://www.repository.naturalis.nl/record/318485

Taccaceae
Provedor de dados: 16
Autores: Drenth, E.
The affinity of Taccaceae has been subject to diverse opinions, many authors favouring a place near Dioscoreaceae, but in my view the unisexual flowers, the branching habit, the racemose inflorescences and the 3-celled ovary in that family make this not very probable. I prefer to share the opinion of those who seek its affinity to Amaryllidaceae, because of the habit, the scape-shaped inflorescence, the umbellate flower disposition with an involucre, and the fact that in that family also occasionally a 1-celled ovary is found. Neither the systematic anatomy nor the inadequately known phytochemistry or chromosome number are sufficiently diagnostic to support opinions on affinity. Before my precursory revision (1972) two genera were distinguished, viz Tacca...
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/532608

Preliminary list of the cetaceans of the southern Caribbean
Provedor de dados: 16
Autores: Bree, P.J.H. van.
Students working at the Caribbean Marine Biological Institute (CARMABI) on the island of Curaçao asked the present author to provide them with a list of Cetacea occurring in the Caribbean. Until recently, compiling such a list was of little use as our knowledge concerning the cetaceans in the area was very poor indeed. During the last few years, however, mainly through the studies by D. K. CALDWELL, M. C. CALDWELL and their collaborators on the lesser cetaceans taken by the small whaling industry on the island of St. Vincent, so much information has become available that it may be now useful to publish a preliminary checklist and a selected bibliography. The preliminary character of this publication must be emphasized, however, and the paper must be seen...
Tipo: Article / Letter to the editor
Ano: 1975
URL: http://www.repository.naturalis.nl/record/506149

In memoriam Jacobus Cornelis (Koos) den Hartog (1942-2000), marine naturalist
Provedor de dados: 16
Autores: Land, J. van der.
Jacobus Cornelis den Hartog was born on 17 April 1942 in Broek op Langedijk. He read biology at Leiden University from 1963 to 1970. He worked at the Caribbean Marine Biological Station on Curaçao from 1971 to 1973, where he studied Caribbean sea anemones. From 1973 he worked in the National Museum of Natural History in Leiden, where he became curator of Coelenterata in 1975. For 25 years he was an active member of the marine research group of the museum and as such he participated in 15 expeditions and was involved in several smaller fieldwork projects, in the Atlantic Ocean as well as in the Indo-W Pacific region. The taxonomy of sea anemones, Actiniaria as well as Ceriantharia and Corallimorpharia, were the main subject of his studies. However, he was a...
Tipo: Article / Letter to the editor
Palavras-chave: Marine ecology taxonomy Cnidaria; Actiniaria; Ceriantharia; Corallimorpharia Aves biography bibliography National Museum of Natural History/Leiden 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220289

A review of old world species of Thyreus Panzer (=Crocisa Jurine) (Hym., Apoidea, Anthophoridae) Part 4. Palearctic species
Provedor de dados: 16
Autores: Lieftinck, M.A.
CONTENTS Page A — GENERAL Introduction............... 3 Distribution............... 7 Comparison of different faunal regions........ 7 Host relationship and flower records......... 8 Acknowledgements ............. 9 Β — SYSTEMATIC I. Taxonomic and group characters........ 11 II. Key to the Palearctic species of Thyreus Panzer ... 13 III. Group of Thyreus dimidiatipuncta (Spinola)..... 35 IV. Group of Thyreus scutellaris (F.)........ 45 V. Other species of Thyreus Panzer........ 6r VI. Species incertae sedis........... 129 VII. Addenda............... 135 C — CATALOGUE OF PALEARCTIC SPECIES OF Thyreus PANZER AND INDEX . . 137 A — GENERAL Introduction The present account is the fourth and last instalment1) of a partial revision of Thyreus Panzer, a melectine...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1968
URL: http://www.repository.naturalis.nl/record/317824

Masquerade, mimicry and crypsis of the polymorphic sea anemone Phyllodiscus semoni and its aggregations in South Sulawesi
Provedor de dados: 16
Autores: Hoeksema, B.; Crowther, A.L.
Phyllodiscus semoni is a morphologically variable sea anemone species from the Indo-Pacific with morphotypes ranging from upright and branched to low-lying and rounded. The apparent camouflage strategies of this sea anemone allow it to resemble other species or objects in its environment, such as stony corals, soft corals, seaweeds, or rocky boulders covered by algae, which may help it to avoid recognition by potential predators. Occasionally, it occurs in aggregations that may result from asexual reproduction. A high level of intraspecific morphological variation, including co-occurring aggregations of three different morphotypes, was observed in the Spermonde Archipelago off Makassar, South Sulawesi, Indonesia. The co-occurrence of aggregations with...
Tipo: Article / Letter to the editor
Palavras-chave: Actiniaria; Aliciidae; Camouflage; Indonesia; Morphotype; Southern Japan; Toxicology; 42.72.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/402023

Reviews
Provedor de dados: 16
Autores: Vink, W.; Leenhouts, P.W.; Balgooy, M.M.J. van; Hovenkamp, P.; Vermeulen, J.J.; Wilde, W.J.J.O. de; Heel, W.A. van.
The Hamameli(i)dae comprise, according to the new classification by Thorne, about one quarter of the genera to one third of the families of the Dicotyledonae. The symposium held at the University of Reading, U.K, 22-25 March 1988, highlighted some of the many questions concerning phylogeny and evolution in this group as a contribution to the insight in the main lines of dicotyledonous evolution. The symposium report contains a wealth of information on a wide variety of topics. The phylogenetic position of the Hamamelidae in a wider or narrower sense, or parts thereof, is subject of a number of papers. F. EHRENDORFER reviews the existing diverging interpretations and concludes that the Hamamelidae can be regarded as ancient and partly relictual survivors...
Tipo: Article / Letter to the editor
Ano: 1990
URL: http://www.repository.naturalis.nl/record/525453

A study on the diversity of island floras
Provedor de dados: 16
Autores: Balgooy, M.M.J. van.
Of 75 regions, some continental and others insular, the diversity as expressed in the number of Phanerogam genera is compared. As could be expected it is found that richness in both continental and insular regions is positively correlated with size and with proximity to source areas. In comparable continental and insular regions the former are always richer; increase in the number of genera with increasing size is stronger in the former. There are various factors disturbing the relations between size/diversity and isolation/diversity. The role of these factors, such as climate, age, topography and the like are discussed. It is shown that isolated islands are not always poor (New Caledonia, Fiji, Lord Howe I., Rapa, etc.). On the other hand the poverty of...
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/524563

The identity of Hapalopoda investigator Filhol, 1885 (Decapoda, Penaeidae) and other shrimps collected by the 1880-1883 "Travailleur" and "Talisman" expeditions
Provedor de dados: 16
Autores: Holthuis, L.B.
In 1880, 1881, and 1882 the French research vessel "Travailleur" explored the deep waters of the Bay of Biscay (1880, 1881, 1882), off the Portuguese coast (1881, 1882), the Mediterranean (1881) and the eastern Atlantic from the Bay of Biscay as far south as the Canary Islands (1882). In 1883 the "Travailleur" was replaced by the larger "Talisman", which ship explored the eastern Atlantic between the Bay of Biscay and the Cape Verde Islands, visiting also the Azores, and going as far west as 31°34'N 41°15'W (of Greenwich = 43°35'W of Paris; the longitudes of the "Travailleur" and "Talisman" stations were always given relative to Paris). A select company of French zoologists was on board the "Talisman" on her (June-August) 1883 cruise. Among these...
Tipo: Article / Letter to the editor
Palavras-chave: 42.74.
Ano: 1980
URL: http://www.repository.naturalis.nl/record/318526

The Lindsaeoid ferns of the Old World V. The smaller Pacific islands
Provedor de dados: 16
Autores: Kramer, K.U.
The present paper is the third regional revision of the Old World Lindsaeoid ferns. The second (the fourth in the entire series on the Old World Lindsaeoids) will be published as vol. II, 1 part 3 of Flora Malesiana; it is awaiting publication as the present paper goes to the press. Species fully described there and extending into the area covered by the present revision are not dealt with at length again, in order to avoid redundance. The present treatment deals with the species of Micronesia, Melanesia, and Polynesia, or, more precisely, the smaller Pacific Islands from the Palau Islands, the Marianas, and the Bismarck Archipelago in the West to Hawaii and the Marquesas in the East. The Volcano and Bonin Islands wil be treated with Japan, to which...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/525242

On two different growth-forms of Merulina laxa, Dana
Provedor de dados: 16
Autores: Boschma, H.
It is a well-known fact that in many species of reef-corals the form of different colonies is largely subject to external influences that affected it during its growth. Not only in different colonies is this variability found, but also parts of the same colony may offer a striking contrast when compared with one another. One of the causes that modify the growth-form of various colonies of reef-corals, especially of the branching ones, is the action of the waves that roll in upon the reef after they have been more or less dissolved at the edge. These waves constantly sweep over the tops of the coral-colonies so as to prevent them to grow in height above a certain level. Together with the larger colonies whose tops are constantly in contact with the waves...
Tipo: Article / Letter to the editor
Palavras-chave: 42.72.
Ano: 1924
URL: http://www.repository.naturalis.nl/record/318420

Caribbean tiger beetles of the genus Cicindela
Provedor de dados: 16
Autores: Jonge Poerink, W.H.
The small collection of tiger-beetles, belonging to the genus Cicindela, which is the subject of this paper, was made by Dr P. Wagenaar Hummelinck during his visits to the Lesser Antilles and the adjacent South American mainland coast in 1936-’37 and 1948-’49. The greater part of the material has been deposited at the „Zoölogisch Museum” of Amsterdam and the „Rijksmuseum van Natuurlijke Historie” at Leiden. Some specimens (14 C. auraria, 10 C. graphiptera and 9 C. trifasciata) were presented to the collections of the American Museum of Natural History, British Museum, Deutsches Entomologisches Institut, Hope Department of Entomology at Oxford, The Imperial College of Tropical Agriculture in Trinidad, Institut Royal des Sciences Naturelles de Belgique at...
Tipo: Article / Letter to the editor
Ano: 1953
URL: http://www.repository.naturalis.nl/record/506073

Reviews
Provedor de dados: 16
Autores: Holttum, R.E.; Steenis, C.G.G.J. van; Sleumer, H.
This is a difficult book on account of the very wide range and complexity of its subject-matter, made more difficult by the fact that the author has not taken the trouble to arrange his writing so as to present a clear sequence of ideas; also he often uses needlessly complex sentences, some made more difficult to understand by careless proof-reading. After a first attempt to read the book through, my mind was quite confused; it was only on a second reading, by referring backwards and forwards to different chapters, that I began to have some understanding of its basic ideas. So if in this review I do not do it justice, I feel that the author will be at least in part to blame. Prof. Meeuse has made an attempt to interpret the floral morphology of flowering...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/525079

Books received by the Rijksherbarium library
Provedor de dados: 16
Autores: NN.
Pleurotus ostreatus and P. pulmonarius, wood-destroying and edible basidiomycetes, were the subject of an ecophysiological study with regard to the connection between water household in the fruitbody and sporulation. Field observations were combined with controlled laboratory experiments on cultivated fruit-bodies. In the field it appeared that when it is about freezing point during the day, sporulation is mainly determined by temperature factors. In milder periods, water content of the fruit-bodies is the major factor influencing the sporulation. There was not found a daily pattern in sporulation nor endogenic rhythm. In cultivated fruit-bodies, the field observations were confirmed as to the influence of relative humidity for the duration of the...
Tipo: Article / Letter to the editor
Ano: 1993
URL: http://www.repository.naturalis.nl/record/531676

Botanical results of a trip to the Salajar islands
Provedor de dados: 16
Autores: Docters van Leeuwen, W.M.
In Blumea, Vol. II, 1937, pp. 239 to 277, appeared an article bearing the above title. It is a description of an excursion to the Salajar Islands, situated south of Celebes; lists of the plants found in the islands are appended. Prof. Dr C. E. B. BREMEKAMP wrote to me that in the Leiden Herbarium a small collection of plants, collected by me in the Salajar Islands, and long ago lent to the late Dr TH. VALETON, have been found. This collection contained, apart from the Rubiaceae, the special subject of Dr VALETON, some representatives of other plant families. Prof. BREMEKAMP sent me a list of names of these plants, for which I tender him my cordial thanks. Besides he communicated to me that a few plants are mentioned under wrong names in the original...
Tipo: Article / Letter to the editor
Ano: 1939
URL: http://www.repository.naturalis.nl/record/525395

An historical review of the identification of the Netherlands’ Charophyta
Provedor de dados: 16
Autores: Zaneveld, J.S.
In 1938, Verdam published an account of the then-known Charophyta of the Netherlands in the English language (cf. this journal, vol. 3), and one year later (1939) another in our own language in “Nederlandsch Kruidkundig Archief”. In both papers reference was made to only five Netherlands’ publications on the same subject, the oldest of which is dating from 1846. In studying i.a. the history of the Malaysian Charophyta (Zaneveld, 1940) I found that much more was published on the Charophyta of our Low Countries. As will be seen below, it became evident that the first printed record of a Netherlands’ Charophyte dates as far back as 1636. It seems worth while to publish these notes on the history of the identification of our Charophyta as, moreover, a number...
Tipo: Article / Letter to the editor
Ano: 1942
URL: http://www.repository.naturalis.nl/record/525256

The activating receptors 2B4 and NTB-A, but not CRACC are subject to ligand-induced down-regulation on human natural killer cells
Provedor de dados: 17
Autores: Stephan Meinke; Carolin B&amp;#xf6;hm; Sibel Durlanik; Carsten Watzl.
Activation of natural killer cells can be mediated by different receptors. Stimulation of the receptors 2B4, NTB-A and CRACC, members of the SLAM-related receptor family, induces cytotoxicity and cytokine production. The surface expression of 2B4 and other activating natural killer cell receptors is down-modulated after receptor engagement, which results in a weaker response to consecutive stimulation. We tested whether this regulatory mechanism applies to all SLAM-related receptors expressed by primary human natural killer cells. After co-culture with target cells expressing the respective ligands different effects on receptor surface expression were observed. While 2B4 ex-pression was strongly reduced, NTB-A showed less prominent down-modulation and the...
Tipo: Manuscript
Palavras-chave: Immunology.
Ano: 2010
URL: http://precedings.nature.com/documents/4917/version/1

Words make people think, ... but pictures make people feel: The effect negative vs. positive images on charitable behavior
Provedor de dados: 17
Autores: Carolina  Perez Due&amp;#xf1;as; Maria Fernanda Rivas; Olusegun A. Oyediran; Alberto Acosta; Pablo Bra&amp;#xf1;as Garza.
We ran an experiment where the subjects initially played a four-round dictator game, after which each subject was shown either a set of positive images or a set of negative images. Finally the subjects played another four-round dictator game.&amp;#xd;&amp;#xa;The effect of the sign of images shown is clear on the players&amp;#x2019; behaviors: positive images have moderate effects on charitable behavior while negative images dramatically increase charity.&amp;#xd;&amp;#xa;We could therefore infer from our experimental results that showing negative images of the Haitian and Chilean catastrophes to the international public would have significant positive impacts on international donations to the victims and the rebuilding programs in both countries.
Tipo: Manuscript
Palavras-chave: Evolutionary Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4287/version/1

A Secret of Hypnosis: A Dynamic Rubber Hand Illusion
Provedor de dados: 17
Autores: Tomohisa Asai; Eriko Sugimori; Yoshihiko Tanno.
Presenting a suggestion of heaviness to a person in a hypnotic trance (e.g., &amp;#x22;your arm is getting heavier and heavier&amp;#x22;) tends to result in a corresponding change in the person&amp;#x27;s body position (e.g., the arm lowers). This phenomenon may be a result of activation of the mirror neuron system, which leads the subject to anticipate actual weight on the arm. The mirror system underlies people&amp;#x27;s ability to sense, in the absence of actual sensory input, experiences of other people. Perhaps this system allows the same anticipatory experience regarding non-human objects. In this study, we showed participants a picture of a rubber hand holding what appeared to be a lightweight rubber ball. In reality, the ball was weighted with...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2008
URL: http://precedings.nature.com/documents/2276/version/1

Does the Density of Invasive Rusty Crayfish Affect Stream Macroinvertebrates?
Provedor de dados: 17
Autores: Mark Kuhlmann; Anthony Prisciondaro; Megan Irland; Greg Hamilton; Sara Caldwell; Ryan Oliver.
Rusty crayfish (_Orconectes rusticus_) have invaded streams of the upper Susquehanna River catchment (New York, USA), replacing native crayfish and probably increasing overall crayfish density. Crayfish are important consumers and agents of disturbance in aquatic communities, so the introduction and expansion of rusty crayfish could affect the invaded community through the change in crayfish species composition, the increase in crayfish density, or some combination of the two. Other macroinvertebrates are prey of, competitors with, or subject to disturbance by crayfish and so are likely to be affected by changes in the crayfish assemblage. We conducted correlative field sampling and an enclosure experiment to investigate the effects of invading _O....
Tipo: Poster
Palavras-chave: Ecology.
Ano: 2009
URL: http://precedings.nature.com/documents/3701/version/1

Assessing functional novelty of PSI structures via structure-function analysis of large and diverse superfamilies
Provedor de dados: 17
Autores: Benoit H. Dessailly; Oliver C. Redfern; Christine A. Orengo.
The structural genomics initiatives have had as one of their aims to improve our understanding of protein function by providing representative structures for many structurally uncharacterised protein families. As suggested by the recent assessment of the Protein Structure Initiative (Structural Genomics Initiative, funded by the NIH), doubts have arisen as to whether Structural Genomics as initially planned were really beneficial to our understanding of biological issues, and in particular of protein function.&amp;#xd;&amp;#xa;A few protein domain superfamilies have been shown to account for unexpectedly large numbers of proteins encoded in fully sequenced genomes.  These large superfamilies are generally very diverse, spanning a wide range of functions,...
Tipo: Manuscript
Palavras-chave: Bioinformatics.
Ano: 2008
URL: http://precedings.nature.com/documents/2214/version/1

A Reaction Route Approach to Flux Balance Analysis
Provedor de dados: 17
Autores: Ilie  Fishtik.
Background: Flux balance and network-based pathway analyses are theoretical tools aimed to find optimal steady state flux distributions in a metabolic network subject to additional constraints on the rates of the reaction steps. Although these methods are mathematically accurate, there are several physicochemical and computational aspects that are questionable and misleading. In particular, it is well known that the flux balance analysis may result in multiple flux distributions for the same objective function.  &amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;Results: The flux balance and network-based pathway analyses are reformulated in terms of reaction routes (RRs), a theoretical framework that has been developed by Horiuti over 50 years ago. Not only does the...
Tipo: Manuscript
Palavras-chave: Biotechnology; Chemistry; Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/2788/version/1

Apotemnophilia - the Neurological Basis of a &amp;#x27;Psychological&amp;#x27; Disorder
Provedor de dados: 17
Autores: Paul D. McGeoch; David J. Brang; Tao Song; Roland R. Lee; Mingxiong Huang; Vilayanur S. Ramachandran.
The question of how the human brain combines disparate sensory inputs to construct a unified body image is of longstanding interest^1,2,3^ . We approached this subject by studying the unusual medical condition of apotemnophilia, in which otherwise mentally normal individuals express the strong and persistent desire for the amputation of a specific healthy limb^4,5,6^ . Here we show using functional brain imaging - magnetoencephalography (MEG) - that the condition is characterised by an absence of activity in the right superior parietal lobule (SPL) when the affected limb is touched. When this discovery is combined with our earlier finding of a simultaneous increase in skin conductance response (SCR) on touching the affected limb^7^ , which reflects...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2009
URL: http://precedings.nature.com/documents/2954/version/1

Free Will or Not: Causality Preserved but Access to Motor Decisions Obscured
Provedor de dados: 17
Autores: Andrei Gorea; Lukasz Grzeczkowski; Delphine Rider.
Empirical studies having addressed the free-will issue suffer from controversial methodologies and interpretations. We present a new paradigm involving a synchronization task where the time interval to synchronize with is randomly within and without subject&amp;#x27;s synchronization capabilities and ask subjects to retrospectively evaluate (Q1) which of the two occurred or (Q2) whether their motor response had had been reactive/speeded or delayed. Contrary to the non-FW view, Q1-judgments correlate with the actual duration of the synchronization interval rather than with subjects&amp;#x27;s motor response latencies. Instead of postidictively reshuffling their judgment to make it match the outcome of their actions, subjects preserve the causal chain of...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2010
URL: http://precedings.nature.com/documents/4633/version/1

Check Your Data Freedom: A Taxonomy to Assess Life Science Database Openness
Provedor de dados: 17
Autores: Melanie Dulong de Rosnay.
Molecular biology data are subject to terms of use that vary widely between databases and curating institutions. This research presents a taxonomy of contractual and technical restrictions applicable to databases in life science. It builds upon research led by Science Commons demonstrating why open data and the freedom to integrate facilitates innovation and how this openness can be achieved. The taxonomy describes technical and legal restrictions applicable to life science databases, and its metadata have been used to assess terms of use of databases hosted by Life Science Resource Name (LSRN) Schema. While a few public domain policies are standardized, most terms of use are not harmonized, difficult to understand and impose controls that prevent others...
Tipo: Manuscript
Palavras-chave: Molecular Cell Biology; Bioinformatics; Data Standards.
Ano: 2008
URL: http://precedings.nature.com/documents/2083/version/1

Consciousness as Recursive, Spatiotemporal Self-Location
Provedor de dados: 17
Autores: Frederic Peters.
At the phenomenal level, consciousness can be described as a singular, unified field of recursive self-awareness, consistently coherent in a particular way; that of a subject located both spatially and temporally in an egocentrically-extended domain, such that conscious self-awareness is explicitly characterized by I-ness, now-ness and here-ness. The psychological mechanism underwriting this spatiotemporal self-locatedness and its recursive processing style involves an evolutionary elaboration of the  basic orientative reference frame which consistently structures ongoing spatiotemporal self-location computations as i-here-now. Cognition computes action-output in the midst of ongoing movement, and consequently requires a constant self-locating...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2008
URL: http://precedings.nature.com/documents/2444/version/1

A unified mechanistic model of niche, neutrality and violation of the competitive exclusion principle
Provedor de dados: 17
Autores: Lev V. Kalmykov; Vyacheslav L. Kalmykov.
The origin of species richness is one of the most widely discussed questions in ecology. The absence of unified mechanistic model of competition makes difficult our deep understanding of this subject. Here we show such a two-species competition model that unifies (i) a mechanistic niche model, (ii) a mechanistic neutral (null) model and (iii) a mechanistic violation of the competitive exclusion principle. Our model is an individual-based cellular automaton. We demonstrate how two trophically identical and aggressively propagating species can stably coexist in one stable homogeneous habitat without any trade-offs in spite of their 10% difference in fitness. Competitive exclusion occurs if the fitness difference is significant (approximately more than 30%)....
Tipo: Manuscript
Palavras-chave: Ecology; Bioinformatics; Plant Biology; Evolutionary Biology.
Ano: 2012
URL: http://precedings.nature.com/documents/7089/version/1

Review of the Carbon Dioxide Splitting Patent Literature
Provedor de dados: 17
Autores: Sierra Rayne.
Increasing concentrations of carbon dioxide in the atmosphere have stimulated significant global research and development efforts regarding the reduction in emissions from all point and non-point sources. In addition to technologies that do not use carbon feedstocks or which capture and &amp;#x22;permanently&amp;#x22; store carbon dioxide (i.e., sequestration), there is considerable worldwide interest for dissociating waste stream carbon dioxide molecules into their constituent carbon and oxygen atoms (&amp;#x22;CO2 splitting&amp;#x22;) as a final &amp;#x22;end-of-pipe&amp;#x22; treatment option. This document presents a review of on-point issued and applied for patents in the field of carbon dioxide splitting. The findings suggest patents in this area...
Tipo: Manuscript
Palavras-chave: Chemistry; Earth &amp; Environment.
Ano: 2008
URL: http://precedings.nature.com/documents/1739/version/1

Consciousness as Recursive, Spatiotemporal Self-Location
Provedor de dados: 17
Autores: Frederic Peters.
At the phenomenal level, consciousness can be described as a singular, unified field of recursive self-awareness, consistently coherent in a particular way; that of a subject located both spatially and temporally in an egocentrically-extended domain, such that conscious self-awareness is explicitly characterized by I-ness, now-ness and here-ness. The psychological mechanism underwriting this spatiotemporal self-locatedness and its recursive processing style involves an evolutionary elaboration of the  basic orientative reference frame which consistently structures ongoing spatiotemporal self-location computations as i-here-now. Cognition computes action-output in the midst of ongoing movement, and consequently requires a constant self-locating...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2009
URL: http://precedings.nature.com/documents/2444/version/2

A similarity criterion for forest growth curves
Provedor de dados: 17
Autores: Georgii A. Alexandrov; Georgy S. Golitsyn.
Comparison of forest growth curves has led many to the conclusion that there is a similarity between forest stands growing in different conditions. Here we treat the same subject from the viewpoint of similarity theory. Our goal is to form a dimensionless ratio of biophysical entities that could parameterize the diversity of forest growth curves. (Such ratios are called similarity criteria.)  Pursuing this goal, we focus on the analogy between tree crown growth and atomic explosion. A blast wave is formed when the rate of energy release is much higher than the rate of energy dissipation. The difference between the rates of energy release and dissipation is the essence of this phenomenon. The essential feature of crown growth is the difference between the...
Tipo: Manuscript
Palavras-chave: Ecology; Plant Biology.
Ano: 2011
URL: http://precedings.nature.com/documents/6561/version/1

A dynamical model of genetic networks describes cell differentiation
Provedor de dados: 17
Autores: Roberto Serra; Villani Marco; Alessia Barbieri.
Cell differentiation is a complex phenomenon whereby a stem cell becomes progressively more specialized and eventually gives rise to a specific cell type. Differentiation can be either stochastic or, when appropriate signals are present, it can be driven to take a specific route. Induced pluripotency has also been recently obtained by overexpressing some genes in a differentiated cell. Here we show that a stochastic dynamical model of genetic networks can satisfactorily describe all these important features of differentiation, and others. The model is based on the emergent properties of generic genetic networks, it does not refer to specific control circuits and it can therefore hold for a wide class of lineages. The model points to a peculiar role of...
Tipo: Manuscript
Palavras-chave: Molecular Cell Biology; Bioinformatics.
Ano: 2010
URL: http://precedings.nature.com/documents/4741/version/1

A bestiary of non-linear functions for growth analysis
Provedor de dados: 17
Autores: C. E. Timothy Paine; Toby Marthews; Deborah Vogt; Drew Purves; Mark Rees; Andy Hector; Lindsay Turnbull.
Plant growth is an essential ecological process, integrating across scales from physiology to community dynamics. Predicting the growth of plants is essential to understand a wide range of ecological issues, including competition, plant-herbivore interactions and ecosystem functioning.&amp;#xd;&amp;#xa;A challenge in modeling plant growth is that growth rates almost universally decrease with increasing size, for a variety of reasons. Traditional analyses of growth are hampered by the need to remain within the structures of linear models, which handle this slowing poorly. We demonstrate the implementation of a variety of non-linear models that are more appropriate for modeling plant growth than are the traditional, linear,...
Tipo: Presentation
Palavras-chave: Ecology; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/5257/version/1

Detecting differential usage of exons from RNA-Seq data
Provedor de dados: 17
Autores: Simon Anders; Alejandro Reyes; Wolfgang Huber.
RNA-Seq is a powerful tool for the study of alternative splicing and other forms of alternative isoform expression. Understanding the regulation of these processes requires sensitive and specific detection of differential isoform abundance in comparisons between conditions, cell types or tissues. We present DEXSeq, a statistical method to test for differential exon usage in RNA-Seq data. DEXSeq employs generalized linear models and offers reliable control of false discoveries by taking biological variation into account. DEXSeq detects genes, and in many cases specific exons, that are subject to differential exon usage with high sensitivity. We demonstrate the versatility of DEXSeq by applying it to several data sets. The method facilitates the study of...
Tipo: Manuscript
Palavras-chave: Genetics &amp; Genomics; Bioinformatics.
Ano: 2012
URL: http://precedings.nature.com/documents/6837/version/2

Memristive model of amoeba&amp;#x27;s learning
Provedor de dados: 17
Autores: Yuriy V. Pershin; Steven La Fontaine; Massimiliano  Di Ventra.
Recently, behavioural intelligence of the plasmodia of the true slime mold has been demonstrated. It was shown that a large amoeba-like cell Physarum polycephalum subject to a pattern of periodic environmental changes learns and changes its behaviour in anticipation of the next stimulus to come. Currently, it is not known what specific mechanisms are responsible for such behaviour. Here, we show that such behaviour can be mapped into the response of a simple electronic circuit consisting of an LC contour and a memory-resistor (a memristor) to a train of voltage pulses that mimic environment changes. We identify a possible microscopic origin of the memristive behaviour in the Physarum polycephalum, which together with the naturally occurring biological...
Tipo: Manuscript
Palavras-chave: Ecology; Molecular Cell Biology; Bioinformatics.
Ano: 2008
URL: http://precedings.nature.com/documents/2431/version/1

Mining PubMed for Biomarker-Disease Associations to Guide Discovery
Provedor de dados: 17
Autores: Walter J. Jessen; Katherine T. Landschulz; Thomas G. Turi; Rachel Y. Reams.
Biomedical knowledge is growing exponentially; however, meta-knowledge around the data is often lacking. PubMed is a database comprising more than 21 million citations for biomedical literature from MEDLINE and additional life science journals dating back to the 1950s. To explore the use and frequency of biomarkers across human disease, we mined PubMed for biomarker-disease associations. We then ranked the top 100 linked diseases by relevance and mapped them to medical subject headings (MeSH) and, subsequently, to the Disease Ontology. To identify biomarkers for each disease, we queried Covance BioPathways, an online data resource that maps commercial biomarker assays to biological and disease pathways. We then integrated pathways-based information to...
Tipo: Poster
Palavras-chave: Genetics &amp; Genomics; Bioinformatics.
Ano: 2012
URL: http://precedings.nature.com/documents/6941/version/1

Cueing in a perceptual task causes long-lasting interference that generalizes across context to affect only late perceptual learning and is remediated by the passage of time
Provedor de dados: 17
Autores: Ramesh Rajan.
Perceptual learning, the improvement in sensory discriminations with practise, is also subject to stimulus-specific interference from temporal jitter in a learning session or manipulations applied between or immediately after sessions. We demonstrate a novel form of perceptual interference where even a brief cueing exposure to a complex speech-in-noise task produces a forward interference on subsequent speech-in-noise learning. This potent interference generalizes across cueing context but specifically affects only late learning in the subsequent task, is resistant to the remediating effects of sleep and persists across an overnight delay involving sleep, and can be evoked by a single exposure 1 day before the learning. Learning in the speech-in-noise task...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2008
URL: http://precedings.nature.com/documents/2387/version/1

UniProt in RDF: Tackling Data Integration and Distributed Annotation with the Semantic Web
Provedor de dados: 17
Autores: Nicole Redaschi; UniProt Consortium.
The UniProt knowledgebase (UniProtKB) is a comprehensive repository of protein sequence and annotation data. We collect information from the scientific literature and other databases and provide links to over one hundred biological resources. Such links between different databases are an important basis for data integration, but the lack of a common standard to represent and link information makes data integration an expensive business. At UniProt we have started to tackle this problem by using the Resource Description Framework (&amp;#x22;http://www.w3.org/RDF/&amp;#x22;:http://www.w3.org/RDF/) to represent our data. RDF is a core technology for the World Wide Web Consortium&amp;#x27;s Semantic Web activities...
Tipo: Poster
Palavras-chave: Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/3193/version/1

Evaluation of three methods for sampling ground-dwelling Ants in the Brazilian Cerrado
Provedor de dados: 82
Autores: Lopes,Cauê T.; Vasconcelos,Heraldo L.
Few studies have evaluated the efficiency of methods for sampling ants, especially in regions with highly variable vegetation physiognomies such as the Cerrado region of central Brazil. Here we compared three methods to collect ground-dwelling ants: pitfall traps, sardine baits, and the Winkler litter extractor. Our aim was to determine which method would be most appropriate to characterize the ant assemblages inhabiting different vegetation types. More species were collected with pitfall traps and with the Winkler extractor than with sardine baits. Pitfall traps collected more species in the cerrado (savanna) physiognomies, particularly in those with a poor litter cover, whereas the Winlker extractor was more efficient in the forest physiognomies, except...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ant inventory; Bait; Formicidae; Pitfall trap; Winkler extractor.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000400007

Aspectos biológicos e morfologia externa dos imaturos de Memphismoruus stheno (Prittwitz) (Lepidoptera: Nymphalidae)
Provedor de dados: 82
Autores: Dias,Fernando M S; Casagrande,Mirna M; Mielke,Olaf H H.
Immature stages of Memphis moruus stheno (Prittwittz) were subject of a behavior, biological and morphological study. The morphological study was carried out through observation by stereoscopic microscopy with camera lucida and micrometric lens attached for illustrations and measurements, respectively; and scanning electron microscopy for ultrastructural analysis. Behavioral data were obtained through direct observation in the field and laboratory. Eggs were laid on the underside of leaves of two Lauraceae species. The first to third instars build frass chains, the fourth and the fifth instars build a conical shelter using a single leaf of the host plant. Before pupation, larvae bend its body ventrally and the pupae are incapable of movement. Descriptions,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaeini; Ocotea; Nectandra; Tegumental ultrastructure.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000300014

Changes in Brazilian Drosophilidae (Diptera) assemblages across an urbanisation gradient
Provedor de dados: 82
Autores: Gottschalk,Marco S.; De Toni,Daniela C.; Valente,Vera L.S.; Hofmann,Paulo R.P.
The present study aims to characterise the assemblages of Drosophilidae sampled from four sites subject to different levels of urbanisation, in the city of Florianópolis, South Brazil. Five samples were collected between August 2000 and August 2001 and five between August 2002 and August 2003 in each site. A gradual change in the dominant species was observed in the urbanisation gradient, with an increase in relative abundance of exotic species in urban areas. Among the native species, the relative abundance of Drosophila capricorni Dobzhansky &amp;amp; Pavan had an expressive decrease. In the other hand the richness in the low urbanisation site increased, probably due to the presence of urban gardens. The diversity index did not vary significantly among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drosophila; Zaprionus; Ecology; Diversity; Richness.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000600005

Contributions to the taxonomy of Trachelyopterus (Siluriformes): comparative cytogenetic analysis in three species of Auchenipteridae
Provedor de dados: 83
Autores: Santos,Dayane Petik dos; Felicetti,Denise; Baumgärtner,Lucas; Margarido,Vladimir Pavan; Blanco,Daniel Rodrigues; Moreira-Filho,Orlando; Lui,Roberto Laridondo.
ABSTRACT Auchenipteridae is divided into subfamilies Centromochlinae and Auchenipterinae. Parauchenipterus is included in the latter and is subject of taxonomic discussions concerning its validation or synonymization with Trachelyopterus. Herein, three species from two hydrographic basins were cytogenetically analyzed: Parauchenipterus striatulus from Doce River and two sympatric species, P. galeatus and Trachelyopterus coriaceus, from the Araguaia River. Diploid number of 58 chromosomes was verified for all species, but P. striatulus has different karyotype formula from the others. The three species have heterochromatin located in terminal regions of almost all chromosomes and in pericentromeric region on acrocentric chromosomes. Simple NORs was verified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; FISH; Parauchenipterus; Problematic taxonomy; 5S rDNA.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100214

Integrity of fluvial fish communities is subject to environmental gradients in mountain streams, Sierra de Aroa, north Caribbean coast, Venezuela
Provedor de dados: 83
Autores: Rodríguez-Olarte,Douglas; Amaro,Ahyran; Coronel,Jorge; Taphorn B.,Donald C.
We examined physical habitat and fish assemblages in rivers of the Aroa Mountains (Venezuela) with different levels of environmental protection due to the creation of Yurubí National Park within the drainage. We developed an Index of Biotic Integrity (IBI) and evaluated it using principal components analysis (PCA) and canonical correspondence analysis (CCA). Tributary rivers were divided into classes according to their origin (protected by the park) and physical characteristics of each, including substrate. Fishes were captured using standardized electrofishing. Fish communities showed greater species richness in heterogeneous habitat and protected rivers but overall abundance was higher in unprotected and impacted rivers. The IBI was sensitive to these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Index of Biotic Integrity; Habitat characterization; Multivariate analysis; National Park.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000300003

DNA barcoding reveals the diversity of sharks in Guyana coastal markets
Provedor de dados: 83
Autores: Kolmann,Matthew A.; Elbassiouny,Ahmed A.; Liverpool,Elford A.; Lovejoy,Nathan R.
ABSTRACT A fundamental challenge for both sustainable fisheries and biodiversity protection in the Neotropics is the accurate determination of species identity. The biodiversity of the coastal sharks of Guyana is poorly understood, but these species are subject to both artisanal fishing as well as harvesting by industrialized offshore fleets. To determine what species of sharks are frequently caught and consumed along the coastline of Guyana, we used DNA barcoding to identify market specimens. We sequenced the mitochondrial co1 gene for 132 samples collected from six markets, and compared our sequences to those available in the Barcode of Life Database (BOLD) and GenBank. Nearly 30% of the total sample diversity was represented by two species of Hammerhead...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: BOLD; Carcharhinidae; Elasmobranch; Guianas; Sphyrnidae.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400209

Environmental constraints structuring fish assemblages in riffles: evidences from a tropical stream
Provedor de dados: 83
Autores: Teresa,Fabrício Barreto; Souza,Luzia Shirlei de; Silva,Dianne Michelle Alves da; Barbosa,Hugo de Oliveira; Lima,Jane Dilvana; Nabout,João Carlos.
ABSTRACT Riffles are unique habitats regarding to assemblage structure. However, understanding how these assemblages respond to environmental variations in small spatial extents, as within a stream, is a challenge. We assess whether the quantitative structure and the trophic composition of fish assemblages vary predictably among stream riffles. We predict that the variation of environmental conditions will explain species abundance and trophic composition, with the latter presenting higher predictive power, since species would be filtered according to their traits (e.g. diet). Moreover, we expect that the low among-riffle dispersal limitation within a stream and the strong habitat filtering would result in lower importance of spatial variables in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental filters; Mass effect; Mesohabitat; Metacommunity; Trophic composition.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300206

The correlations between certain features of the journal Neotropical Ichthyology and its impact factor: a comparative analysis at the thematic and national levels
Provedor de dados: 83
Autores: Menezes,Sabrina; Strehl,Letícia.
The present article analyzes the relationship between characteristics of the journal Neotropical Ichthyology and its impact factor (IF) between 2006 and 2011 using bibliometric descriptive quantitative methods. To perform this analysis, two samples of journals included in Journal Citation Reports (JCR) were studied. One sample was composed of journals classified within the subject of zoology, and the other contained journals from different areas published in Brazil. The instrument used for data collection was a database created in Microsoft Excel 2007 and the Statistical Package for the Social Sciences (SPSS) version 18. The results show that despite its short history, Neotropical Ichthyologyhas exhibited a distinctive impact, as manifested in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bibliometric methods; Self-cited rate; Self-citing rate; Uncitedness rate; Zoology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100001

Integrated biomarker response index using a Neotropical fish to assess the water quality in agricultural areas
Provedor de dados: 83
Autores: Vieira,Carlos Eduardo Delfino; Almeida,Mayara da Silva; Galindo,Bruno Ambrssio; Pereira,Lindalva; Martinez,Claudia Bueno dos Reis.
Aquatic ecosystems in areas with intense agricultural activity are subject to pesticide contamination, which may compromise the health of the fish. In order to verify the quality of the water and the possible effects of pesticides on fish, a method that combines different biomarker responses into an index named "integrated biomarker response" (IBR) was applied using the biological alterations in the Neotropical fish Astyanax altiparanae. Fish were maintained in situ at five sites along a stream that runs in an agricultural area and in a stream within a forest fragment, considered a reference site. After seven days of exposure the following alterations were observed in fish confined at experimental sites: increased activity of glutathione-S-transferase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Astyanax altiparanae; Biomonitoring; Biotransformation; Genotoxicity; Pesticides.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100153

Organization of fish assemblages in blackwater Atlantic Forest streams
Provedor de dados: 83
Autores: Esteves,Katharina Eichbaum; Silva,Marcelo Horikoshi Candido; Nanini-Costa,Maressa Helena; Petesse,Maria Letizia.
ABSTRACT This study aimed to determine whether fish species occupy different mesohabitats, as defined by specific criteria of substrate types in Atlantic Forest blackwater streams. We sampled fourteen coastal blackwater rivers along the coast of São Paulo State, Brazil, during the low-flow season (June-September/2016). For each stream, we selected three mesohabitat types (sand, leaf-litter and trunks) in a 100 m river stretch. We sampled 41 mesohabitats, 31 of which contained fish, resulting in 15 species. When multivariate analysis of variance (MANOVA) was applied to the mesohabitat abiotic variables, no significant differences were indicated between them. ANOSIM for species density and biomass and Redundancy Analyses (RDAs) for species density, biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community structure; Leaf-litter; Mesohabitat; Spatial distribution; Substrate types.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100212

Ecophysiological responses to the effect of annual management on an endemic viviparous fish in central plateau of México
Provedor de dados: 83
Autores: Garcia-Trejo,Fernando; Hurtado-Gonzalez,Silvia Laura; Soto-Zarazúa,Genaro; Alatorre-Jacome,Oscar; Rico-García,Enrique; Gutiérrez-Yurrita,Pedro Joaquín.
Studies on the biological aspects of fish typically focus on species that currently have commercial value, causing species that lack such market value to be ignored. This is the case of several freshwater fish, specifically of several members of the Goodeidae family. In the State of Querétaro there are several species of this family characterized for being viviparous and having distinctive sexual dimorphism that may have commercial potential. The subject of this study is Girardinichthys multiradiatus, a viviparous fish endemic to the upper-half of the Lerma River basin. The lack of knowledge regarding its biology and ecology has prevented the development of guidelines to manage its habitat and to preserve its population. The objective was to determine the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergetics; Conservation; Deterioration; Population dynamic; Trophic spectrum.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100117

Price policies for upland field crops and the new farrn subsidy scheme for the stabilization of farrn businesses : A comparison of Japan, the EU and the U.S.
Provedor de dados: 19
Autores: 澤田, 学.
On October 27，2005，the Ministry of Agriculture，Forestry and Fisheries (MAFF) announced the outline of a new farm subsidy program that incorporates non-product specific farm business stabilization measures (Japanese-style direct payments)，which is scheduled to commence in fiscal year 2007. This represents a shift from product specific price support policies embracing all producers，to an income policy with a focus on core farming entities. The purpose of this article is to clarify the characteristics of the new measures through a comparison with the direct payment programs of the United State and European Union (EU) and the examination of the new scheme's consistency with WTO agreements，and to point out the issues regarding the implementation. Some of the...
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2825

Farmers' decision making strategies on selecting rootcrop varieties in the Visayas Region, Philippines
Provedor de dados: 19
Autores: ROA, Julie; KADOHIRA, Mutsuyo; BERGANTIN, Reynaldo V.; BOLATETE Jr., Dioscoro M.; YAMAUCHI, Akira; ロア, ジュリー; 門平, 睦代; ベルガンティン, レイノルド; ボラテテ, ディオスコロ; 山内, 章.
In the Philippines, rootcrops play a significant role in providing livelihood and food security among the resource poor people living in fragile upland environment, which comprise about 65% of the total agricultural land in the country. This paper will present the factors which play into farmers’ decision-making strategies for varietal adoption, particularly of sweetpotato and cassava in Visayas Region, Philippines. Relative importance of factors as they are considered in the farmers’ decisionmaking process vary according to user-orientation (i.e. subsistent, semi-commercial and commercial) because such would have varietal trait specifications, scale of operations, and consequently, resource needs. In largely market or industry-oriented systems, the...
Palavras-chave: Farmer criteria; Participatory approach; Philippines-Visayas; Rootcrop; Variety adoption; イモ類作物; 参加型アプローチ; 農民の判断基準; 品種導入; フィリピン・ビサヤ州.
Ano: 2008
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2269

Kenya, Reef Status And Ecology
Provedor de dados: 20
Autores: Mwachireya, S.; Uku, J.N.; Mdodo, R.; Obura, D.; Wawiye, P.
Coral reefs along the entire coast of Kenya suffered widespread bleaching and mortality of corals during the first half of 1998 (Wilkinson, 1998; Obura, 1999; McClanahan et al., 1999). This status report summarises findings relating specifically to coral bleaching, mortality and effects on benthic community structure. In addition, preliminary results from a number of research projects investigating different aspects of the bleaching event are reported here. In shallow waters, on a per-area basis, most of Kenya’s southern fringing reefs have lost between 66% and 80% of their live corals. Coral reefs in deeper water suffered less mortality due to lesser exposure to higher temperatures. Reefs on the northern part of the coast, influenced by cold water...
Tipo: Report
Palavras-chave: Coral reefs; Ecology.
Ano: 2000
URL: http://hdl.handle.net/1834/774

Reports on Aquatic Sciences and Fisheries Abstracts (ASFA)
Provedor de dados: 20
Autores: Odido, Mika.
The Intergovernmental Oceanographic Commission of UNESCO is one of the United Nation’s co-sponsoring partners for the Aquatic Sciences and Fisheries Abstracts (ASFA). This is an abstracting and indexing service covering the world's literature on the science, technology, management, and conservation of marine, brackish water, and freshwater resources and environments, including their socio-economic and legal aspects. The ASFA bibliographic database contains over 820,000 references, with coverage since 1971 (some 800,000 are computer searchable from 1973 onwards). About 3,500 new bibliographic references are added each month to the database. Each bibliographic reference includes: the title of the document in its original language (all non-English titles are...
Tipo: Report
Palavras-chave: Aquatic sciences; Fisheries literature.
Ano: 2003
URL: http://hdl.handle.net/1834/1825

The Global Oceanographic Data Archaeology and Rescue Project (GODAR): Sea Level Data Proposal
Provedor de dados: 20
Autores: Woodworth, Philip; Rickards, Lesley.
At its meeting in May 1999, the IOC Group of Experts on the Global Sea Level Observing System (GE-GLOSS) discussed the need for data archaeology of historic sea level records in order to possibly extend existing time series and/or gain access to observations which are not in digital form. Following on from this, a member of the GE-GLOSS attended the GODAR Review Conference in Silver Spring, Maryland in July 1999, and suggested that sea-level data also be included in the GODAR project. The GODAR sea level proposal is this. In many countries there are considerable amounts of historical sea level data in paper form such as charts or tabulations.  These need to be computerised (a) as a backup for data security, and (b) so that they can be subject to modern...
Tipo: Report
Palavras-chave: Oceanographic data; Archaeology; Sea level; Sea level; Data; Http://aims.fao.org/aos/agrovoc/c_34115; Http://aims.fao.org/aos/agrovoc/c_49816.
Ano: 2000
URL: http://hdl.handle.net/1834/1821

Kenya, Reef Status and Ecology
Provedor de dados: 20
Autores: Mdodo, R.; Uku, J.N.; Obura, D.; Wawiye, P.; Mwachireya, S.
Coral reefs along the entire coast of Kenya suffered widespread bleaching and mortality of corals during the first half of 1998 (Wilkinson, 1998; Obura, 1999; McClanahan et al., 1999). This status report summarises findings relating specifically to coral bleaching, mortality and effects on benthic community structure. In addition, preliminary results from a number of research projects investigating different aspects of the bleaching event are reported here. In shallow waters, on a per-area basis, most of Kenya’s southern fringing reefs have lost between 66% and 80% of their live corals. Coral reefs in deeper water suffered less mortality due to lesser exposure to higher temperatures. Reefs on the northern part of the coast, influenced by cold water...
Tipo: Other
Palavras-chave: Coral reefs.
Ano: 2002
URL: http://hdl.handle.net/1834/433

Programa de Manejo y Procedimientos – Programa de Rancheo
Provedor de dados: 20
Autores: Nodarse A., G.; Meneses, A.; Manolis, S.Ch.; Webb, G.J.W.; Carrillo C., E.; Pelegrín, E.
La proposición de Cuba para el rancheo de E. imbricata ha sido y continuará siendo una vía cautelosa basada en la experimentación objetiva.  Estudios piloto han establecido  de forma inequívoca  que las crías de E. imbricata de huevos silvestres pueden desarrollarse en cautiverio hasta alcanzar la talla comercial.  Dichos estudios han indicado también una serie de variables que afectan la supervivencia, el crecimiento y la eficiencia de producción, todo lo cual está sujeto a investigaciones actuales.
Tipo: Journal Contribution
Palavras-chave: Turtle fisheries; Ranching; Procedures; Ranching; Http://aims.fao.org/aos/agrovoc/c_37579.
Ano: 1998
URL: http://hdl.handle.net/1834/3991

Participatory mapping of terrestrial fishery resources in Kwale District, Kenya
Provedor de dados: 20
Autores: Kimani, P.; Obura, D.
A participatory mapping study was conducted in Kinondo location of Kwale district in Kenya. The area is subject to high human population and development pressure in the north, where tourism and urban development is intense, compared to lower population pressure in the south where such development is low. Our focus was to document information about these resources that have maintained fishing for many generations and to address issues of their conservation and management. The study focused on the spatial arrangement, access, ownership and use of land-based resources, mainly shrubs, grasses and trees, at four landing sites along the north-south population gradient. Participatory techniques (sketch maps, livelihood diagrams and transect walks) were applied,...
Tipo: Journal Contribution
Palavras-chave: Artisanal fishing; Resource availability; Coral reefs.
Ano: 2004
URL: http://hdl.handle.net/1834/1122

Seychelles tuna bulletin year 2002 and first semester 2003
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and from data collected via the tuna sampling programme conducted during transhipment in port Victoria. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should note that many of the figures presented here are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  PURSE SEINERS PRINCIPAL...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 2004
URL: http://hdl.handle.net/1834/5178

From Farming to Fishing: Marine Resource Conservation
Provedor de dados: 20
Autores: Versleijen, Nicole; Hoorweg, Jan.
This paper examines the arrival of a new group of fishermen on the Kenyan coast and what this has meant for the state of fishery resources. It reviews four subject areas: access and the number of fishermen; the fishermen’s identity; the choice of fishing gear; and the fishing grounds selected. Data were collected from a small number of fishing households in the villages of Uyombo and Takaungu in Kilifi District, using mainly qualitative research methods. Local households on the Kenyan coast face increasing pressure on land as well as on marine resources. The declining economic situation and greater pressure on land have made people turn to fishing as an income-generating activity. This group of fishermen is referred to as the ‘new’ generation of fishermen...
Tipo: Journal Contribution
Palavras-chave: 1604; Fisheries; Fishery resources; Fisheries; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_2934; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 2008
URL: http://hdl.handle.net/1834/3205

Sea level monitoring in Mozambique
Provedor de dados: 20
Autores: Nhampulo, C.I.S.; Ruby, J.
Observing changes in the rise of relative sea level has resulted from the balance between the sea level rise due to the global warming of the planet, and the vertical displacements of the coast due to geological movements. The main objective of this paper is to outsource information about sea level monitoring in Mozambique, as part of a common global effort aiming to colect and analyse data that can help in understanding physical processes envolving ocean basins or oceans as a hole. Tidal stations at Maputo (lat. 25º 58.5’ S, lon. 32º 34.2’ E), Beira (lat.19º 49.4’ S, lon. 34º 50.0’ E), Quelimane (lat. 18º 00.3’ S lon. 36º 58.2’ E), Nacala (lat. 14º 27.8’ S, lon. 40º 40.8’ E), Inhambane (lat. 23º 52.0’ S, lon.35º 22.6’ E) Pemba (lat. 12º 58.0’ S, long. 40º...
Tipo: Journal Contribution
Palavras-chave: Mozambique; Sea level measurement.
Ano: 2002
URL: http://hdl.handle.net/1834/191

Morphosedimentary evolution of a delta-sourced, drift-aligned sand barrier-lagoon complex, western Bight of Benin
Provedor de dados: 20
Autores: Anthony, E.J.; Blivi, A.B.
The coast of eastern Ghana and Togo is bounded by a major Holcene  sand barrier complex hinged on the Volta Delta to the west and subject to high rates of longshore sand drift (1-1.5 x 10 m³/yr). In spite of its proximity to this major detaic sediment source, this barrier system shows marked longshore variations in progadation following the middle Holocene eustatic sillstand.  It is a 'hybrid' system in terms of internal facies composition and plan-view morphology, in that it has evolved from an essentially regressive to a stationary (synonymous with cessation of progradation) system. Both transgressive and barrier-inlet facies have also developed through time and space.  These temporal and spatial changes in patterns of development reflect variations in...
Tipo: Journal Contribution
Ano: 1999
URL: http://hdl.handle.net/1834/2509

Sanitary And Phytosanitary Measures And Their Impact On Kenya
Provedor de dados: 20
Autores: Noor, H.
While traditional trade barriers in agriculture such as tariffs continue to decline, technical and regulatory barriers are increasingly subject to debate. According to FAO's investigation, more developing counries experiencing trade obstacles due to SPS measures. SPS measures are any measure applied (a) To protect human or animal life or health from risks arising from additives, toxins or disease-causing organisms in foods, beverages or foodstuffs; (b) To protect human life or health arising from risks arising from diseases carried by animals, plants or products thereof, or from entry, establishment of pests; (c) To protect animal or plant life or health from risks arising entry, establishment or spread of pests, diseases, disease-carrying organisms or...
Tipo: Working Paper
Palavras-chave: Sanitary engineering; Phytosanitary measures; Http://aims.fao.org/aos/agrovoc/c_37922.
Ano: 1998
URL: http://hdl.handle.net/1834/386

Ecología trófica de la anchoíta (Engraulidae, Engraulis anchoita)del Mar Argentino. Parte III. Requerimiento trófico individual en relación con el crecimiento, ciclo sexual y las migraciones estacionales
Provedor de dados: 20
Autores: Angelescu, V.A.; Anganuzzi, A.
The paper was developed in order to arrange the data gathered on this subject and to generate new hypotheses in connection with the trophic strategy of the northern stock of anchovy in the area between latitudes 35°-42°S. Such estimates were finally compared with the values of the gravimetric determinations of stomach contents- as converted to caloric values - of individuals grouped by total-length amd age classes, ecological areas, and seasons of the year. The set of results as obtained conforms the initial basis for developing Part IV of the Trophic Ecology of the Argentine anchovy as related to food consumption estimates, by stock biomass and annual classes, with back-calculations to age class 0, and for applying "regional patterns" that result from the...
Tipo: Journal Contribution
Palavras-chave: Growth curves; Bioenergetics; Migrations; Length-weight relationships; Condition factor.
Ano: 1986
URL: http://hdl.handle.net/1834/2022

Integrated coastal research in the SW Netherlands
Provedor de dados: 27
Autores: Mulder, J.P.M.; Louters, T.; Hallie, F.; Postma, R.; Craeymeersch, J.A.; Hamerlynck, O.
The geomorphological and ecological response of the ebb tidal deltas of the SW Netherlands to implementation of the Delta Project during the last decades, has been the subject of an integrated research project. General observed geomorphological trends are: erosion of the delta fronts and of the relic tidal bars in the landward parts of the deltas, and sedimentation in the tidal channels and in longshore bars at the edges of the deltas. Ecologically, a general trend towards richer benthic fauna communities is observable. The integrated approach in coastal research combining geomorphological analysis of field data with numerical modelling, and integrating hydraulic, geomorphological, sedimentological and biological data, has appeared very promising. Progress...
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/imisdocs/publications/300799.pdf

Manipulated yeast diets as a partial algal substitute for rearing bivalve molluscs: laboratory trials with &lt;i&gt;Tapes semidecussata&lt;/i&gt;
Provedor de dados: 27
Autores: Coutteau, P.; Lavens, P.; Léger, P.; Sorgeloos, P.
The development of a cost-effective algal substitute would greatly reduce operating costs of bivalve hatcheries and has therefore been the subject of many studies. Previous work has resulted in the development of a yeast diet with improved digestibility and nutritional composition. Preliminary trials showed that this diet can substitute up to 80% of the algal diet in the seed culture of the Manila clam &lt;i&gt;Tapes semidecussata&lt;/i&gt;. In this communication we propose a culture test diet which will be used to study further dietary improvements of the yeast product.Juveniles of the Manila clam (1 to 5 mg unit weight) were batch cultured in a 51 recirculating system. Optimal daily ration for the algal control diet &lt;i&gt;Chaetoceros...
Tipo: Info:eu-repo/semantics/article
Ano: 1990
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2812

Greenhouse gas emissions from soils under organic management
Provedor de dados: 21
Autores: Ball, Bruce; Scott, Albert; Mc Taggart, Iain P; Watson, Chistine A.
This report was presented at the UK Organic Research 2002 Conference.  Land emissions of N2O, CO2 and NH3 have been subject to little study under organic systems, yet form important aspects of sustainability of such systems. We describe innovative methods developed at SAC to assess trace gas emission using both automatic closed chamber systems (intensive, short term monitoring) and manually-operated closed chamber systems (occasional, long term monitoring). Long-term data were collected from organic ley-arable rotation trials in North-east of Scotland. Short term data were collected to show the effect of timing and depth of ploughing-out of the ley phase on gas emissions. Ploughing gave a shortterm stimulation of CO2 and, more markedly, of N2O emission....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil; Air and water emissions.
Ano: 2002
URL: http://orgprints.org/8291/1/Ball_Greenhouse_emissions_soils.pdf

Forum Pflanzenschutz im ökologischen Landbau – Themenbezogenes Netzwerk im Bereich Pflanzenschutz
Provedor de dados: 21
Autores: Wilbois, Klaus-Peter.
Im Bereich des Pflanzenschutzes im ökologischen Landbau liegen für den Öko-Anbauer vielfältige Fragestellungen vor, die sich auf verschiedenen Ebenen ergeben. Diese reichen vom praktischen Anbau über Herstellung und Einsatz von zulässigen Mitteln bis hin zur Gesetz- und Regelungsgebung. Um in den genannten Bereichen und deren komplexen Zusammenspiel substantielle Schritte voranzukommen, ist der Informationsaustausch unter den verschiedenen Akteuren auf den unterschiedlichen Ebenen eine notwendige Voraussetzung.  Ziel des themenbezogenen Netzwerkes ‚Forum Pflanzenschutz im ökologischen Landbau’ war es, den Austausch von Informationen, Erkenntnissen, Problem- und Fragestellung auf und zwischen den verschiedenen Ebenen aufzubauen bzw. zu verbessern. Dieses...
Tipo: Report
Palavras-chave: Crop health; Quality; Protection Education; Extension and communication.
Ano: 2003
URL: http://orgprints.org/11029/1/11029%2D02OE640%2Dfibl%2Dwilbois%2D2003%2Dforum_pflanzenschutz.pdf

Value Added Grains for Local and Regional Food Systems
Provedor de dados: 21
Autores: Kissing Kucek, Lisa; Baker, Brian; Dyck, Elizabeth; Dawson, Julie; Benscher, David; Davis, Mike; Kutka, Frank; Perry, Robert; Roth, Greg; Russell, June; Zwinger, Steve; Sorrells, Mark.
Small grains provide numerous benefits for organic farming systems. However, because they have relatively low value and require special equipment, many organic farming systems do not integrate them. Heritage varieities of ommon wheat (Triticum aestivum ssp. Aestivum) and its antecedents spelt (Triticum aestivum, ssp. spelta), emmer (Triticum turgidum subsp. dicoccum) and einkorn (Triticum monococcum) are the subject of a project that looks at their viability.  Preliminary results of variety trials show that organic farmers have several promising small grain options. Improved management and appropriate equipment are barriers to adoption that the project aims to overcome. Viability will depend on overcoming marketing as well as production obstacles.
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems Food systems Breeding; Genetics and propagation.
Ano: 2014
URL: http://orgprints.org/24148/1/24148-Kucekal-2014_01_09-1_MM.pdf

Quality of organic foods – a model for comparative analysis
Provedor de dados: 21
Autores: Vasileva, Elka; Ivanova, Daniela; Tipova, Nina; Stefanov, Stilian.
The quality and safety of organic products has been the subject of lively debate in the scientific community in recent years. The growing demand for organic food is based primarily on consumers’ concerns about the quality and safety and the perception that organic foods are healthier and safer than conventional foods. This paper identifies and makes analyses of comparative research studies on the quality of organic and conventional foods conducted over the last fifteen years. Based on the food quality science fundamentals a conceptual model for comparative testing of product quality is proposed. The model examines the dynamic relationship between its three basic components: "Designed Quality", "Perceived Quality" and "Achieved Quality". The proposed model...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health.
Ano: 2019
URL: http://orgprints.org/35128/1/13165_2018_211_OnlinePDF_fin2.pdf

Trial setup and statistical analysis
Provedor de dados: 21
Autores: Büchse, A.; Krajewski, P.; Kristensen, K.; Pilarczyk, W.
The response from field trials is subject to random variation. This means that two neighbouring plots grown with the same variety and treated in the same way will always yield differently. This also applies to all other recordings made on a continuous scale. The size of the differences will depend on several circumstances such as the variability in the soil, variability in the applied fertilizer, historical events and uncertainty in the recording process. This means that a recorded difference between e.g. two varieties may be due to either a true difference in the response of the two varieties or may be due to random variations. In order to help decide whether the difference is caused by the different varieties or by random variation it is necessary to...
Tipo: Book chapter
Palavras-chave: Surveys and statistics Breeding; Genetics and propagation.
Ano: 2007
URL: http://orgprints.org/21757/1/21757.pdf

Combined production of broilers and fruits
Provedor de dados: 21
Autores: Lindhard Pedersen, H.; Olsen, A.; Pedersen, B.; Korsgaard, M.; Horsted, K.
Combined production of broilers and fruit trees is a subject often discussed in organic fruit  production in Denmark. Very little research has been carried out on this type of production  system. In organic production in Denmark, nearly no pesticides are allowed, so the need  for alternative pest control is large. Apple sawfly (Hoplocampa testudinea) and pear midge  (Contarinia pyrivora) cause big crop losses in apples and pears respectively, in unsprayed  organic fruit production. Both insects infest fruitlets and cause these to drop prematurely  after which the pests pupate in the topsoil. In the present experiment a research orchard  with the varieties ‘Discovery’ and ‘Conference’ were used as outdoor area for broilers to  minimise the population of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2004
URL: http://orgprints.org/14522/1/25_Pedersen_131_136.pdf

Biodiversity recovery and transformation impacts for wetland biodiversity
Provedor de dados: 21
Autores: Pezzati, L.; Verones, F.; Curran, M.; Baustert, P.; Hellweg, S.
Life Cycle Assessment (LCA) methods for land use take both occupation and transformation impacts into account. However, for wetlands and impacts from water consumption, it is so far not possible to account for transformation impacts. It is our goal to close this research gap, by determining wetland recovery times and developing characterization factors for transformation. To do this, we conducted ameta-analysis of 59 studies analyzing biodiversity recovery in wetlands subject 20 to passive and active restoration. Generalized linear models were fitted to the biodiversity data and age, along with other wetland characteristics (such as elevation, latitude or climate class), were used as predictor variables. The results indicate that elevation, latitude, type...
Tipo: Journal paper
Palavras-chave: Biodiversity and ecosystem services; Policy environments and social economy.
Ano: 2018
URL: http://orgprints.org/34710/1/Pezzati-etal-2018-EnvSciTechno-Vol52-p8478-8487.pdf

Altering the composition of ruminant-derived foods for improved human health
Provedor de dados: 21
Autores: Shingfield, Kevin J.; Viitala, Sirja; Leskinen, Heidi; Vilkki, Johanna.
Nutritional regulation of milk and meat fatty acid composition has been the subject of  intense research during the last few decades. Considerable progress has been made  towards understanding the role of diet on enhancing the nutritional value of ruminantderived  foods while more recent studies have attempted to elucidate the molecular  mechanisms underlying the changes in milk and tissue lipid fatty acid composition in  ruminants. Diet is the major environmental factor influencing the CLA content of  ruminant milk whilst the effects of genotype, stage of lactation and parity are  relatively minor (Palmquist el al. 2005). Concentrations of CLA in ruminant meat are  dependent on diet, gender, slaughter weight and breed with evidence of variable  enrichment...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health.
Ano: 2010
URL: http://orgprints.org/18290/1/Shingfield.doc

A construção social da agroecologia no assentamento Tapera, em Riacho dos Machados, MG.
Provedor de dados: 21
Autores: Lteif, Ana Paula Alves Silva.
The present work analyzes the social construction of development alternatives, expressed through the proposal of the agroecology, bringing as empiric reference for analysis the experience in agroecology of a rural settlement. That Settlement is called Tapera and it is located in the district of Riacho dos Machados, in the North area of the Minas Gerais state, and its technique is advised and politically for an organization of the civil society, more precisely for an Non-Govemmental Organization (NGO) dedicated to the rural development, that has as proposal to promote the maintainable rural development based in the Agroecology beginnings. However, previous to the study of the case in subject, it was looked for understanding the emergency of conceptions and...
Tipo: Thesis
Palavras-chave: Farming Systems; Social aspects.
Ano: 2008
URL: http://orgprints.org/21962/1/Lteif_Construcao.pdf

Organic Farming: Policy and Prospects
Provedor de dados: 21
Autores: Dabbert, S.; Häring, A. M.; Zanoli, R.
Food retailers in Europe, including supermarkets, have responded to rapidly rising demand for organic produce. The organic sector has moved from a marginal production fad to a serious subject of policy concern for politicians and public servants involved in European agricultural policy. Drawing on a huge body of scientific research, this book   - reviews the organic farming sector today and the policies developed towards it   - assesses its contributions to the environment, food quality, farmers' incomes, and rural development   - explains the key factors impinging on the organic farming sector in future   - makes a detailed range of recommendations for future organic farming policy   Contents  1 Organic farming: A grassroots movement taken over by policy?...
Tipo: Book
Palavras-chave: Markets and trade; Policy environments and social economy.
Ano: 2003
URL: http://orgprints.org/2225/1/kein%2DDokument.pdf

EU rules for organic wine production
Provedor de dados: 21
Autores: Szeremeta, Andrej.
As of August 2012, almost one year ago, organic wines can be labelled "organic", with the EU organic logo. This means wine can now be properly recognised as an organic product. Now that organic wine is fully integrated into EU legislation and therefore part of CAP (as well as being a subject for additional private standards), organic wine production - both in the vineyard and in winemaking - can be fully recognised as ecologically, economically and socially sound. We now have a solid basis for further development of the sector, and already we can see a positive response, with increasing production and new initiatives all over Europe.  In the past, wines could only be labelled as "made from organic grapes". The new legislative framework, established by...
Tipo: Other
Palavras-chave: "Organics" in general Farming Systems Values; Standards and certification Viticulture Environmental aspects.
Ano: 2013
URL: http://orgprints.org/29867/1/ifoameu_reg_wine_dossier_201307.pdf

The Danish Organic Movement: From Social Movement to Market  Mainstream and Beyond...?
Provedor de dados: 21
Autores: Kjeldsen, Chris; Ingemann, Jan Holm.
The development of organic and with them various other forms of alternative food networks have been the subject of extensive research within the field of agro-food studies during the past 10–20 years. In that period, organic food has gained an increasing food market share and a wide number of Western countries, among them Denmark, can thus be termed mature organic markets. The maturation process, whereby the organic movement becomes an integrated part of the established food system is at first glance an obvious example of the cooptation of an alternative into the established mainstream. However, the development paths which can be termed ecological regionalisation as well as ecological postmodernisation, which have been facilitated by new means of...
Tipo: Book chapter
Palavras-chave: Community development; Markets and trade; Policy environments and social economy.
Ano: 2010
URL: http://orgprints.org/17469/4/17469.pdf

Bundesprogramm Ökologischer Landbau (BÖL): Pflanze
Provedor de dados: 21
The Federal Organic Farming Scheme (FOFS)  This scheme is a temporary funding source (2002 – 2007/2008) especially to support the whole organic farming sector (incl. research) in Germany.  In the summer of 2001, the Federal Ministry of Consumer Protection, Food and Agriculture commissioned a project team comprised of representatives from associations and science and headed by the Federal Agricultural Research Centre to develop a proposal for a package of measures to foster organic farming in Germany. A hearing of representatives from trade and industry, associations, consultancy, science and administration laid the foundation for the team's work. Based on this work, the Federal Minister of Consumer Protection, Food and Agriculture Renate Künast decided to...
Tipo: Research Programme description
Palavras-chave: Crop husbandry.
Ano: 2023

International Research Association for Organic Food Quality and Health (FQH)
Provedor de dados: 21
The International Research Association for Organic Food Quality and Health aims to establish a network of research institutions specialized in the background of organic food and its effect on human health.     Interdisciplinary as well as specialised investigations on organic food quality concepts and novel research methods to study the influence of organic food on human health will be promoted.    Activities    Through a coordinating secretariat the FQH Association is implementing the following activities:   - implement joint research projects. Combining of resources e.g. by sharing samples for multiple testing as well as staff exchange among institutions to enhance more efficiency and effectiveness.    - evaluate, standardise and validate new methods to...
Tipo: Organization description
Ano: 2023
URL: http://orgprints.org/1155/1/index.html

Wirkung von Vorkeimung, organischer Stickstoffdüngung und einer Kupferbehandlung auf Ertrag und Qualität von Kartoffeln im Ökologischen Landbau
Provedor de dados: 21
Autores: Paffrath, Andreas.
Limiting factors in organic potato production are predominantly nitrogen and infesta-tion with late blight disease (Phytophthora infestans). To maintain high yields, organic nitrogen fertilization, presprouting and control of potato late blight with copper-treatments are potential measures. A field trial was conducted in 2005 and 2006 to evaluate which single measure and combination of measures was most likely to achieve the best results. In both years, organic nitrogen fertilization led to an average yield increase of 16%. Tuber presprouting before planting accelerated plant emer-gence, increasing yields by up to 24%. It was the most effective single measure, provided that late blight disease appeared (2005). In absence of infection with late blight,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Root crops.
Ano: 2007
URL: http://orgprints.org/9586/1/9586_Paffrath_Poster.pdf

Principles and practicality of organic dairy cattle breeding: different options and implications
Provedor de dados: 21
Autores: Nauta, MSc W.J.; Roep, Dr. D.
As yet there is no set of generally acknowledged rules for organic animal breeding. Most organic farmers depend on conventional breeding programmes, which conflict with organic principles. Do we need a separate, distinct organic breeding system? And how can we support the development of organic breeding? These questions were explored in a PhD study. In general organic farmers and other interest groups express the need for a separate, fully organic breeding system, particularly in view of the modern reproduction technologies used in conventional breeding. Also the difference in the magnitude of GxE between organic and conventional milk production indicates that a separate breeding program might be needed. In practice, however, organic farmers respond to...
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding and genetics.
Ano: 2008
URL: http://orgprints.org/12445/1/Nauta_12445_ed.doc

Phytotherapy in zoo animals
Provedor de dados: 21
Autores: Hoby, S.; Wenker, C.; Walkenhorst, M.
Phytotherapy is one of the oldest medical disciplines and was traditionally based on empiricism (Reichling et al., 2008). Nowadays, its use as an additional integral component of evidence based medicine is well accepted in human medicine (Finkelmann, 2009). Herbal remedies are generally characterised by a broad therapeutic index. They consist of multicomponent mixtures and act as multi-target drugs with pleiotropic effects. In Switzerland, veterinary phytotherapy has been relaunched in 2006 as a subunit of the Swiss Medical Society for Phytotherapy (SMGP-vet). Since 2012, the certificate of qualification in veterinary phytotherapy has been approved by the Swiss Veterinary Association (GST/SVS). Historically, one of the common approaches to gain insight...
Tipo: Journal paper
Palavras-chave: Health and welfare.
Ano: 2015
URL: http://orgprints.org/34517/1/hoby-etal-2015-SchweizerArchivTierheilk_Band157-Heft11_p619-623.pdf

Promotion of Eco-Tourism Using the Practice of Wikipedia: The Case-Study of Environmental and Cultural Paths in Zakynthos
Provedor de dados: 21
Autores: Martinis, Aristotelis; Halvatzaras, Dimitrios; Kabassi, Katerina.
The development of sustainable eco tourism and cultural tourism could have positive effects in many socioeconomic factors of a country. A way of promoting eco-tourism is by using the knowledge and the experiences of different people for presenting the natural and cultural resources. This can be achieved using the practice of Wikipedia, in which anyone can submit information on a subject, in our case the environment, and an administrator reviews what will be published. In this work, we focus on the submission of cartographical data concerning the paths and routes that present environmental and cultural interest. These data have been collected and processed using GIS, Remote Sensing and GPS technologies. For each path a description of the type of the path,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Education; Extension and communication Environmental aspects.
Ano: 2011
URL: http://orgprints.org/19965/1/04_Martinis_FULL[1].pdf

Climate balance of organic and conventional foodstuffs compared
Provedor de dados: 21
Autores: Lindenthal, Thomas; Markut, Theresia; Hörtenhuber, Stefan; Rudolph, Gwendolyn; Hanz, Katharina.
In the discussion regarding the climate-relevance of foodstuffs, the terms regionalism and non-regionalism are often at the center of public debate. Hereby the often much higher CO2-emissions which are generated in agriculture and its inputs as well as in foodstuff processing are regularly neglected. It is also the case that many CO2-balances do not pay due attention – or just do not incorporate - land use change or the climate specific advantages of organic farming.  Every foodstuff causes greenhouse gas emissions (CO2-eq), during production and processing, which contribute toward global warming.  A broad study conducted by FiBL Austria – for the organic brand „Zurück zum Ursprung“of the supermarket chain Hofer/Aldi Süd, investigated the CO2-emissions of...
Tipo: Other
Palavras-chave: Dairy cattle Cereals; Pulses and oilseeds Air and water emissions.
Ano: 2010
URL: http://orgprints.org/17998/1/lindenthal%2Detal%2D2010%2Doekologie%2Dlandbau%2D1.pdf

Organic Certification in the iPOPY Countries and Germany – Current Status and Future Challenges
Provedor de dados: 21
Autores: Strassner, Carola; Roehl, Rainer.
The paper is part of the proceedings of an iPOPY seminar. Organic production has to be certified and labeled along the supply chain in order to maintain trust in organic premium products. Since January 1st 2009, organic certification in Europe is subject to the new Council Regulation (EC) No 834/2007 of 28 June 2007. This regulation specifically excludes so-called mass catering operations. It is up to EU member states to apply national rules or private standards insofar as these comply with community law. The paper presents the state of the art and upcoming changes of organic certification of out-of-home catering in Germany with regard to Norway, Finland, Denmark, and Italy.
Tipo: Conference paper, poster, etc.
Palavras-chave: Values; Standards and certification Processing; Packaging and transportation Produce chain management.
Ano: 2009
URL: http://orgprints.org/15542/1/iPOPY_Proceedings_BioFach_2009_StrassnerRoehl.pdf

Effect of cultivar and soil characteristics on nutritional value in organic and conventional wheat
Provedor de dados: 21
Autores: Murphy, Dr. Kevin; Hoagland, Dr. Lori; Reeves, Dr. Philip; Jones, Dr. Stephen.
Evidence of greater nutritional value in organic crops is currently a subject of intense debate. Our objectives in this study were to test for grain mineral concentration in 35 winter wheat cultivars in paired organic and conventional systems, and to determine the influence of cultivar, soil characteristics and farming system on mineral concentration.  Here we report preliminary results that show that the grain mineral concentration in organic wheat was higher for copper (Cu), magnesium (Mg), manganese (Mn), phosphorus (P) and zinc (Zn) and lower in calcium (Ca), than the grain mineral concentration in conventional wheat. No difference was found between systems for iron (Fe) concentration.  Cultivar was significant in determining mineral concentration for...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Cereals; Pulses and oilseeds Breeding; Genetics and propagation.
Ano: 2008
URL: http://orgprints.org/12397/1/12397.pdf

Impact of different Agents on the Efficacy of Codling Moth Granulovirus in Tank Mixtures
Provedor de dados: 21
Autores: Fritsch, E.; Undorf-Spahn, K.; Huber, J.; Kienzle, J.
In the control of codling moth it is common to combine the granulovirus with other agents,  especially fungicides, in spray application. Therefore the knowledge about the influence of  these agents on the efficacy of the virus in tank mix is very important. Studies on this  subject were part of a project supported by BMELV (German Federal Ministry for Food,  Agriculture and Consumer protection) at the Institute for Biological Control of JKI in  Darmstadt.  The granulovirus of Cydia pomonella (L.) (CpGV) was mixed with 10 different agents at  concentrations as applied in the field. After the exposure the virus activity was calculated  from larval mortality determined in bioassays with neonates of a susceptible codling moth  strain.  Only two agents with a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2008
URL: http://orgprints.org/13704/1/252%2D255.pdf

Final Report: Coordinating Organic Breeding Activities for Diversity - COBRA
Provedor de dados: 21
Autores: Pearce, Bruce.
Plant breeding is crucial in creating organic crop production systems that can better cope with interacting stresses such as pests and diseases (especially seed-borne diseases), weeds and the increasingly erratic and unpredictable variation in climate and weather. In this context, COBRA aimed to support and develop organic plant breeding and seed production with a focus on increasing the use and potential of plant material with high genetic diversity in cereals (wheat and barley) and grain legumes (pea and faba bean), through coordinating, linking and expanding existing breeding and research. Although systems based on high, within-crop diversity have shown promising results in organic systems and are now subject to intensive research, their benefits cannot...
Tipo: Report
Palavras-chave: Crop combinations and interactions Breeding; Genetics and propagation.
Ano: 2016
URL: http://orgprints.org/31194/1/COBRA%20final%20report%20V1.0.pdf

Plant Products as Biopesticides:  Building On Traditional Knowledge of Vrkshayurveda:  Traditional Indian Plant Science
Provedor de dados: 21
Autores: Balasubramanian, Mr. A.V.; Arumugasamy, Mr. S.; Vijayalakshmi, Dr. K.; Subhashini, Mrs. S.
Today there is a global search for alternatives to chemical pesticides and as part of this process there are various efforts to test the use and efficacy of natural products for pest control and crop protection.  Our Centre has been involved in exploring the traditional knowledge regarding the use of natural products for pest control and crop protection.  As part of this effort, we have looked at the traditional folk practices prevalent among farmers as well as information from classical literature on the subject drawn from Vrkshayurveda (traditional Indian plant science).  Following this, we have carried out experiments for standardizing and field testing promising natural products by determining the precise range and kind of pests controlled by them,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Crop husbandry.
Ano: 2008
URL: http://orgprints.org/11938/1/11938.pdf

Approaches for field assessment of resistance to leaf pathogens in spring barley  varieties
Provedor de dados: 21
Autores: Pinnschmidt, H.O.; Hovmøller, M.S.; Østergård, H.
The resistance of spring barley varieties to powdery mildew, leaf rust, leaf scald and net blotch was characterized by using results from inoculated small-plot nurseries and larger survey plots subject to natural infection. The experiments were conducted in different environments. Both trial types often yielded complementary results with respect to the ranking of varieties suggesting that a recommended variety characterization should include both naturally infected survey-type trials and nursery trials in which the most relevant pathogen isolates and/or isolate mixtures or populations are used for inoculation. Average and median values of the diseased leaf area of a variety were highly correlated with each other and with the genotype main effect determined...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation.
Ano: 2006
URL: http://orgprints.org/8203/1/8203.pdf

What can research deliver for organic farming?
Provedor de dados: 21
Autores: Atkinson, D.
The research needs of any applied subject are always influenced by three major groups of criteria. These are the economic/political, the societal/ethical and the technical/scientific. This is especially the case for Organic Farming which explicitly sets out to present a positively value based approach to agriculture, an activity, which has commonly become dominated by the commercial economics of an industrial society. To maintain this ethical stance Organic Farming must challenge some of the tenets of conventional economics and politics and must work within the particular societal context. Its scientific needs are then driven either by the need to increase its role in terms of market share or the need to achieve its aims more effectively in respect of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Systems research and participatory research; Social aspects; Farm economics.
Ano: 2006
URL: http://orgprints.org/10150/1/What_can_Research_deliver_for_Organic_Farming.pdf

Pioniere einer Rinderhaltung mit natürlichem Sterben
Provedor de dados: 21
Autores: Meyer-Glitza, Patrick.
Vegetarianism and Veganism have become the subject of public debate. But even a vegetarian diet including milk products results in the slaughtering of cows after their productive life and in the slaughtering of fattened male breed cattle. Narrative and semi-structured interviews were conducted on 5 farms that do not slaughter their cattle. These farms were either certified as organic farms, or are former organic farms or strongly oriented toward organic farming. Subsequently the interviews were analysed applying Grounded Theory. The emerging four principles of a care-system for healthy, handicapped, old, ill and dying cattle are described and related to the IFOAM principles. Further on innovations leading to this care-system and the main challenges it...
Tipo: Conference paper, poster, etc.
Palavras-chave: Beef cattle; Social aspects.
Ano: 2015
URL: http://orgprints.org/27232/1/27232_meyer_glitza.pdf

Full case study report: Planika - Slovenia
Provedor de dados: 21
Autores: Borec, Andreja.
The Planika dairy was established in 1957. The current Limited Liability Company (LLC) structure was defined in 1995 by the Agricultural Cooperative Tolmin. The company’s raw material (milk) comes from 120 to 130 (varying number from year to year) local mountain farms in northern and north-western Slovenia. Most of the farms are located in the Tolmin, Kobarid, and Idrija regions. Currently, the company is selling 19 different milk products under the ‘Planika’ brand. The high-quality products are characterised by freshness and taste, as well as the avoidance of gene technology and chemicals or synthetic pesticides in its production. The dairy started selling organic milk in April 2013. Since then, they have been subject to the organic quality-control...
Tipo: Report
Palavras-chave: Food security; Food quality and human health Markets and trade Consumer issues Produce chain management.
Ano: 2015
URL: http://orgprints.org/29240/13/29240.pdf

Annual and seasonal changes in production and composition of grazed clover-grass mixtures in organic farming
Provedor de dados: 21
Autores: Kuusela, Eeva.
A grazed field experiment based on a randomised block design was conducted in Eastern Finland to evaluate the potential of alsike clover (Trifoliun hybridum L.), red clover (Trifolium pratense L.) and white clover (Trifolium repens L.) to support herbage production from clover-grass mixtures under organic farming practices. The effect of seed mixture (alsike clover, red clover, white clover, white and alsike clover or grass mixture), year (1996, 1997 and 1998) and grazing period (5 per grazing season) on pre- and post-grazing herbage mass (HM), botanical and chemical composition of pregrazing HM and post-grazing sward height was assessed. The nutritive value of herbage for milk production was also considered. Seed mixtures resulted in different pre-grazing...
Tipo: Journal paper
Palavras-chave: Feeding and growth.
Ano: 2004
URL: http://orgprints.org/16750/1/kuusela.pdf

GMOs and organic agriculture: Six lessons from Australia
Provedor de dados: 21
Autores: Paull, John.
GMO moratoria are in place in Australia, in some states and not in others. Is co-existence possible between organic farming and GMO farming? And if so, under what circumstances? Australia has more certified organic land than any other country, with a reported 12.0 million hectares of certified organic land compared to the world total of 37.5 million hectares. In a recent court case, an organic farmer lost his organic certification because of GMO contamination. A total of 325 hectares of his 478 hectare farm were contaminated with GM canola blown from a neighbouring property, and this resulted in the decertification of most of the farm. The organic farmer sued his neighbour, a GMO farmer, on the basis of nuisance or negligence, he sought damages for loss of...
Tipo: Journal paper
Palavras-chave: Technology assessment; Social aspects; Food systems; Environmental aspects; Regulation.
Ano: 2015
URL: http://orgprints.org/28525/7/28525.pdf

STUDIES ON THE COSTITUENTS OF SWEET PEPPER (SENISE PEPPER PGI) SUBJECTED TO DIFFERENT DRYING TECHNIQUES
Provedor de dados: 21
Autores: Melotti, Edoardo.
The work presented in this thesis, which is the first on the subject, was carried out at the Department of Chemistry, University of Milan under the supervision of Prof. Giovanna Speranza and Dr. Carlo Morelli within the project : “Drying, Juices and Jams of Organic Fruit and Vegetables: What happens to Desired and Non-Desired compounds?” (acronime “FaVOrDeNonDe”). The FaVorDeNonDe project, funded by the action of CORE Organic Plus (Coordination of European Transnational Research in Organic Food and Farming Systems)- Topic 4. Ensuring quality and safety of organic food along the processing chain, is coordinated by Dr. Roberto Lo Scalzo of CREA-IAA of Milan (Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria - Unità di ricerca per i...
Tipo: Thesis
Palavras-chave: Food security; Food quality and human health.
Ano: 2016

Buckwheat in the Nutrition of Livestock and Poultry
Provedor de dados: 21
Autores: Leiber, Florian.
With its high contents of starch, buckwheat grain can be a valuable source of carbohydrates in diets for any kind of livestock and poultry. Although the crude protein concentrations are limited, its amino acid profile is advantageous due to the high intrinsic proportions of lysine and methionine.  In many regions with temperate climate conditions it is possible to cultivate buckwheat as a catch crop, e.g. after the harvest of barley, in the same season. This makes the crop a second harvest from a given arable land within the same year. If it is used to feed livestock, it contributes to decrease the feed-food competition about arable surfaces in a world with dramatically growing food demands. As a flowering crop, buckwheat positively contributes to the...
Tipo: Book chapter
Palavras-chave: Crop combinations and interactions; Feeding and growth.
Ano: 2016
URL: http://orgprints.org/30290/1/Leiber_BUCKWHEAT_2016.pdf

Wissensstandanalyse zur Tiergesundheit ausgewählter Nutz-tierarten im Ökologischen Landbau
Provedor de dados: 21
Autores: Bender, Sophia; Koopmann, Regine; Simoneit, Celine.
This research report is about animal health in organic farming. It has been intended for providing recommendations for future research in order to optimize organic farming. An evaluative review and assessment of searchable publications, which cover the period from 1991 to 2011, national as well as international, has been conducted. A total of recorded 569 publications on animal health in livestock production were found. This included articles on general topics (42 publications), on cattle (211), on pigs (181), on poultry (100), on small ruminants (25) and on other species (10). There is a lack of research to examine a practical realisation (n = 124). In organic cattle farming the subject of mastitis has been edited very often. Problems such as lameness,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Production systems; Research communication and quality; Health and welfare.
Ano: 2013
URL: http://orgprints.org/21485/1/21485_bender.pdf

ORGANIC IN THE LOCAL VS GLOBAL ANTINOMY
Provedor de dados: 21
Autores: Colombo, Luca; Grando, Stefano; Brunori, Gianluca.
Increasing attention is paid by European citizens to food chain characteristics, power relations and impacts. Distance travelled by food, its genuinity and capacity to convey cultural and landscape identity, fairness in the value chain and information robustness on quality specifications tend to assume a growing relevance in both public perception and business organisation.  A triennial multidisciplinary and multicriteria study, funded under the EU 7th Framework Research Programme, aims to assess the performance of local and global food chains against economic, environmental, social, health and ethical dimensions.  This paper examines how organic foods and method of production fits into the local/global discourse, as the subject emerges from an Italian...
Tipo: Conference paper, poster, etc.
Palavras-chave: Surveys and statistics; Italy.
Ano: 2014
URL: http://orgprints.org/24038/1/24038%20Organic%20in%20the%20local%20Vs%20global%20antinomy%20Colombo%20Grando%20Brunori_MM.pdf

Leindotterpresskuchen in ökologischen Futterrationen: Stand der Forschung
Provedor de dados: 21
Autores: Paulsen, H. M.; Weißmann, F.; Fischer, K.; Halle, Ingrid; Matthäus, B.; Bauer, M.; Pscheidl, M.; Vogt-Kaute, W.
Organic farming needs home-grown energy and protein sources in livestock feeding. Due to the concept of mixed cropping systems with oilseeds like false flax (Camelina sativa (L.) Crantz) the possible use of its oilcake as a component of feeding rations is attracting attention of farmers. False flax is an undesired substance in the European rules on feeding stuffs and the use of its oilcake in animal feeding is subject of diverse research projects. A review of the recentThe experiences shows that the use of oilcake of false flax in monogastric animals can negatively affect sensory meat quality and metabolism obvious in enlarged organs. In ruminant feeding those effects are not observed. Further research is needed to find out adopted feeding rations for...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth.
Ano: 2005
URL: http://orgprints.org/3515/1/3515.pdf

Assessing stakeholder's experience and sensitivity on key issues for the economic growth of organic aquaculture production
Provedor de dados: 21
Autores: Lembo, Giuseppe; Jokumsen, Alfred; Spedicato, Maria Teresa; Facchini, Maria Teresa; Bitetto, Isabella.
Participatory management is widely recognised as a working method of paramount importance, based on the principles of knowledge sharing, accountability and legitimacy. Hence, it is broadly considered suitable for addressing issues related to the sustainable development of the seafood industry, and specifically, of the aquaculture system. A survey focused on the current EU regulatory framework was carried out to elicit stakeholders’ preferences, knowledge and experience on key issues for the development of organic aquaculture, supported by science-based regulations. The survey was completed by 65 stakeholders belonging to several categories, and it was supported by the implementation of the Analytic Hierarchy Process method. Stakeholders’ preferences were...
Tipo: Journal paper
Palavras-chave: Consumer issues; Aquaculture; European Union; Regulation.
Ano: 2018
URL: http://orgprints.org/35348/1/JMPO_2018_Organic_aquaculture.pdf

Science as systems learning. Some reflections on the cognitive and communicational aspects of science
Provedor de dados: 21
Autores: Alrøe, Hugo Fjelsted.
This paper undertakes a theoretical investigation of the 'learning' aspect of science as opposed to the 'knowledge' aspect. The practical background of the paper is in agricultural systems research – an area of science that can be characterised as 'systemic' because it is involved in the development of its own subject area, agriculture. And the practical purpose of the theoretical investigation is to contribute to a more adequate understanding of science in such areas, which can form a basis for developing and evaluating systemic research methods, and for determining appropriate criteria of scientific quality. Two main perspectives on science as a learning process are explored: research as the learning process of a cognitive system, and science as a...
Tipo: Journal paper
Palavras-chave: Research methodology and philosophy.
Ano: 2000
URL: http://orgprints.org/429/1/Alroe_2000_Science_as_systems_learning__preprint_.pdf

Representation of Potato Virus Y control strategies in current and past extension literature
Provedor de dados: 21
Autores: Döring, Thomas F.; Schrader, Joachim; Schüler, Christian.
The aphid-vectored Potato virus Y (PVY) is currently seen as an important limiting factor in the production of potatoes in many countries. Using a contentanalysis approach, we investigated the German extension literature for recommendations regarding the control of PVY. Media included articles from periodicals addressing farmers and agricultural textbooks published in the last five decades (1955–2004). In the current literature (1995–2004), the clearly dominating strategy was found to be insecticidal control, although this strategy has been subject to some criticism in the scientific literature. Over the last five decades we also found a strongly increasing representation of insecticidal strategies. Furthermore, over this period of time, information...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Knowledge management Root crops.
Ano: 2006
URL: http://orgprints.org/19778/1/2006%2DDoring_et_al%2DPotres.pdf

Forum Pflanzenschutz im ökologischen Landbau – Themenbezogenes Netzwerk  im Bereich Pflanzenschutz
Provedor de dados: 21
Autores: Wilbois, K.-P.; Reiners, E.
Ziel des themenbezogenen Netzwerkes ‚Forum Pflanzenschutz im ökologischen Landbau’ [1] ist es, den Austausch von Informationen, Erkenntnissen, Problem- und Fragestellung auf und zwischen den verschiedenen Ebenen aufzubauen bzw. zu verbessern. Dies geschieht im Rahmen von vorbereiteten Workshops, die unter Beteiligung der relevanten Akteure wichtige Fragestellungen des Pflanzenschutzes im Öko-Landbau diskutieren. Die zu diskutierenden Punkte umfassen z. B. praktische Probleme des ökologischen Landbaus im Bereich Pflanzenschutz, aktuelle Forschungsvorhaben in diesem Feld, administrativ-politische Fragestellungen sowie Fragen über geeignete Mittel zu Pflanzenschutzzwecken  im ökologischen Landbau.
Tipo: Book chapter
Palavras-chave: Crop health; Quality; Protection.
Ano: 2004
URL: http://orgprints.org/8912/1/wilbois%2D2004%2DVorstellung%2DProj%2DKurzfg.pdf

Umsetzung des EU-Vergaberechts: eine Chance für ökologische  und regionale Lebensmittel in der Gemeinschaftsverpflegung?
Provedor de dados: 21
Autores: Haack, Michaela; Häring, Anna Maria; von Münchhausen, Susanne.
The purchase of food and catering services for public institutions is subject to European rules on public procurement. Basic principles of free movement of goods, nondiscrimination and efficiency restrict contracting entities aiming to procure special qualities like local and organic food. However, the reform of EU public procurement law in 2004 permits to define environmental and social criteria in tender documents. National action plans and guidelines even stress the importance of sustainable procurement practices. By analysing tender calls for school catering in Berlin and Brandenburg, this paper aims to point out the opportunities and challenges that arise by the implementation of procurement laws. Results show several weaknesses in award procedures...
Tipo: Conference paper, poster, etc.
Palavras-chave: Social aspects; Markets and trade; Policy environments and social economy; Produce chain management; Regulation.
Ano: 2017
URL: http://orgprints.org/31511/1/Umsetzung%20des%20EU-Vergaberechts.pdf

STUDIES ON THE COSTITUENTS OF SWEET PEPPER (SENISE PEPPER PGI) SUBJECTED TO DIFFERENT DRYING TECHNIQUES
Provedor de dados: 21
Autores: Melotti, Edoardo.
The work presented in this thesis, which is the first on the subject, was carried out at the Department of Chemistry, University of Milan under the supervision of Prof. Giovanna Speranza and Dr. Carlo Morelli within the project : “Drying, Juices and Jams of Organic Fruit and Vegetables: What happens to Desired and Non-Desired compounds?” (acronime “FaVOrDeNonDe”). The FaVorDeNonDe project, funded by the action of CORE Organic Plus (Coordination of European Transnational Research in Organic Food and Farming Systems)- Topic 4. Ensuring quality and safety of organic food along the processing chain, is coordinated by Dr. Roberto Lo Scalzo of CREA-IAA of Milan (Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria - Unità di ricerca per i...
Tipo: Thesis
Palavras-chave: Food security; Food quality and human health.
Ano: 2016

Measurement of microbial numbers, activity, biomass and diversity as a response to different methods of treatment of Tanzanian soil
Provedor de dados: 21
Autores: Grimsby, Lars Kåre.
Microbial biomass, numbers, activity and diversity were measured in tropical agricultural soil in Tanzania throughout the growth season of maize (Zea maize). Four farmers each had three plots that were subject to three different methods of treatment to improve soil fertility: 1) Removal of plant residues and other organic material, tilling to 10 cm, and adding nitrogen (60 kg pr ha) and phosphorus (40 kg pr ha). 2) Tilling organic plant material, such as maize residues, 10 cm into the soil, without adding fertilizer. 3) Collecting residues in heaps and burning them. No added fertilizer and no tillage. During the growth season, the total biomass and activity of the microflora increased as a response to higher soil water levels due to the rainy season. The...
Tipo: Thesis
Palavras-chave: Weed management; Soil biology; Soil tillage.
Ano: 2005
URL: http://orgprints.org/10378/1/150107_LKG_thesis.pdf

Researching sustainable agriculture: The role of values in systemic science
Provedor de dados: 21
Autores: Alrøe, Hugo Fjelsted.
This paper presents a specific perspective on the science demarcation issue, the perspective of systemic science. A systemic science is a science that influences its own subject area. Agricultural science is an example of such a science  - a point that is particularly evident in connection with research in organic farming, which forms the practical context of this paper. Far from the ideal of being 'value-free' and objective, the systemic science must, upon recognising itself as systemic, acknowledge the role of values in research and include value inquiry as a specific research task. But still, the systemic science insists that it is science. Given that it is science, what then demarcates 'science' as different from other social activities? Or, in other...
Tipo: Conference paper, poster, etc.
Palavras-chave: Research methodology and philosophy.
Ano: 2000
URL: http://orgprints.org/9149/1/2000%2DAlroe_%2D_Paper_to_Demarcation_Socialised_21aug00_(sendt).pdf

Organic, fair and social: Cooperation between ethical standards systems in agriculture
Provedor de dados: 21
Autores: Spoor, BSc Gijs.
In this report a comparison is made between three voluntary standardisation systems in agriculture. The organic agriculture system, the fair trade system and the social accountability system have all been developed by non-governmental organisations to promote production, trade and consumption based on ecological and social principles, and all involve monitoring, certification, labelling and codes of conduct. Context of this research is a two-year collaboration project, started in May 2001, between the Fair Trade Labelling Organisation (FLO), the International Federation of Organic Movements (IFOAM) and Social Accountability International (SAI), focusing on developing guidelines for social auditing.     Standards are discussed as part of a new model of...
Tipo: Thesis
Palavras-chave: Social aspects Values; Standards and certification.
Ano: 2002
URL: http://orgprints.org/404/1/SocialAccountabilitySustAgri.doc

Communication in animal health and welfare planning
Provedor de dados: 21
Autores: Vaarst, Mette; Walkenhorst, Michael; Smolders, Gidi.
The project ‘Minimising medicine use in organic dairy herds through animal health and welfare promotion’ is focused on animal welfare assessment and its role in the active use of animal health plans in order to improve animal health and welfare on organic farms. To be active, a health plan requires dialogue between the farmer and those who are able to view the farm from the outside e.g. vets and advisors. The importance of this communication is the focus of this paper.     Across Europe we see highly diverse farming systems and similarly diversity in advisory systems and their approaches to communicating with farmers. One of the objectives of the AniPlan project is to develop approaches to health planning that are robust yet sufficiently adaptable to be...
Tipo: Report chapter
Palavras-chave: Food security; Food quality and human health Health and welfare Breeding and genetics Feeding and growth.
Ano: 2008
URL: http://orgprints.org/13408/1/13408.pdf

Do inspection practices in organic agriculture serve organic values? A case study from Finland
Provedor de dados: 21
Autores: Seppänen, Laura; Helenius, Juha.
In many European countries, organic agriculture has rapidly been transformed from a farmers' movement to an institutionalized part of agricultural policy. In certification, compliance with published organic standards is verified through annual inspections on farms.  In Finland, the role of advice in organic inspections has been the subject of debate. Two inspections are used here to show how the term organic was defined and what the role of advice in relation to compliance was.  Both compliance and advisory types of interaction between the inspector and the farmer were identified along an axis from “input substitution” to “system redesign.”  The findings illustrate the heterogeneity of the processes and definitions of the term organic in connection with...
Tipo: Journal paper
Palavras-chave: Policy environments and social economy Education; Extension and communication Regulation.
Ano: 2004
URL: http://orgprints.org/23330/1/23330.doc

Nitrate leaching and growth of cereal crops following cultivation of contrasting temporary grasslands
Provedor de dados: 21
Autores: Eriksen, J.
Intensive dairy farming with low N use efficiencies may have adverse environmental impact through nitrate leaching. The residual effects of six different temporary grasslands (1994-96) on yield and nitrate leaching in the following cereal crops (1997-99) were investigated on a loamy sand in central Jutland. The grasslands were unfertilized grass-clover and fertilized ryegrass subject to cutting or continuous grazing by dairy cows with two levels of N in feed supplements. In the first year there was sufficient residual effect of the grazed grasslands to obviate the need for supplementary fertilizer, but in the following years gradually more fertilizer N was required to obtain optimal yields. Nitrate leaching decreased as a function of time after cultivation...
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2001
URL: http://orgprints.org/156/1/paper.doc

Análise das variações na receita líquida otimizada de uma área irrigada sujeita a manejo convencional e ecológico.
Provedor de dados: 21
Autores: Cabral, Wendel Silva; Curi, Rosires Catão; Curi, Wilson Fadlo; Alencar, Vladimir Costa.
O processo de obtenção de novas metodologias agrícolas, com o intuito de acelerar a produção de alimento para atender o crescimento populacional, segue no sentido, dentre outros, da maximização da produtividade, do lucro e da conservação do meio ambiente. Daí a importância das pesquisas em mecanismos que resultem em um equilíbrio sustentável entre aspectos financeiros, sociais e ambientais. Dentro deste contexto os modelos de otimização podem vir a proporcionar uma melhor solução para os processos que ocorrem neste setor produtivo. O objetivo do trabalho foi a comparação através de simulações de cenários com diferentes funções objetivo entre a agricultura convencional e a ecológica, de uma área irrigada no município de Boqueirão, PB, tendo como base de...
Tipo: Journal paper
Palavras-chave: Farming Systems; Social aspects.
Ano: 2011
URL: http://orgprints.org/23075/1/Cabral_An%C3%A1lise.pdf

STUDIES ON THE COSTITUENTS OF SWEET PEPPER (SENISE PEPPER PGI) SUBJECTED TO DIFFERENT DRYING TECHNIQUES
Provedor de dados: 21
Autores: Melotti, Edoardo.
The work presented in this thesis, which is the first on the subject, was carried out at the Department of Chemistry, University of Milan under the supervision of Prof. Giovanna Speranza and Dr. Carlo Morelli within the project : “Drying, Juices and Jams of Organic Fruit and Vegetables: What happens to Desired and Non-Desired compounds?” (acronime “FaVOrDeNonDe”). The FaVorDeNonDe project, funded by the action of CORE Organic Plus (Coordination of European Transnational Research in Organic Food and Farming Systems)- Topic 4. Ensuring quality and safety of organic food along the processing chain, is coordinated by Dr. Roberto Lo Scalzo of CREA-IAA of Milan (Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria - Unità di ricerca per i...
Tipo: Thesis
Palavras-chave: Food security; Food quality and human health.
Ano: 2016
URL: http://orgprints.org/30787/1/E%20Menotti%20Thesis%20Abstract.pdf

Organic and conventional public food procurement for youth in Denmark – a national overview
Provedor de dados: 21
Autores: Hansen, Stine Rosenlund; Nielsen, Thorkild; Kristensen, Niels Heine.
This report is a mapping of the activities within public procurement of organic food for youth in Denmark, with a special focus on school meals. In Denmark, it is voluntary whether local municipalities or schools arrange school meals or not. Over time, more and more schools or municipalities choose to establish school meal systems, but these vary extensively in the way they are organized, what kind of food is served, and how they are financed. This report includes an overall mapping of the different ways of organizing school meals and their dissemination.  Organic food has also been increasingly debated in relation to public procurement for children and youth. Whether the subject of organic food is discussed and implemented depends on the local values,...
Tipo: Report
Palavras-chave: Markets and trade; Food systems; Produce chain management; Denmark.
Ano: 2010
URL: http://orgprints.org/17333/1/NATIONAL_REPORT_BIOFORSK_RAPPORT_DENMARK_24_08_10_finalword.pdf

Ecology of Earthworms under the ‘Haughley Experiment’ of Organic and Conventional Management Regimes
Provedor de dados: 21
Autores: Blakemore, Robert.
Significant differences in earthworm populations and soil properties were found in three sections of a farm at Haughley in Suffolk that, since 1939, had either an organic, a mixed conventional, or a stockless intensive arable regime.  Compared with the mean earthworm population of a 1,000 year old permanent pasture of 424.0 m-2; an organic field had 178.6 m-2; a mixed field 97.5 m-2; and a stockless field 100.0 m-2.  Species recorded were: Allolobophora chlorotica, accounting for most of the increase in the organic section; Aporrectodea caliginosa, dominant in the stockless section; Aporrectodea icterica; Ap. longa; Ap. nocturna; Ap. rosea; and Lumbricus terrestris.   Soil analyses showed the organic soil had higher moisture, organic C, and mineral N, P,...
Tipo: Journal paper
Palavras-chave: Soil biology; Composting and manuring; Biodiversity and ecosystem services; History of organics.
Ano: 2000
URL: http://orgprints.org/30000/1/Haughley.doc

Characterization of eucalyptus clones subject to wind damage
Provedor de dados: 86
Autores: Zanuncio,Antônio José Vinha; Carvalho,Amélia Guimarães; Carneiro,Angélica de Cassia Oliveira; Valenzuela,Paulina; Gacitúa,William; Leite,Fernando Palha; Colodette,Jorge Luiz.
Abstract: The objective of this work was to test a new methodology to assess the resistance of trees to wind damage and determine the characteristics that increase clone resistance to winds. Tree resistance to breakage, basic density, ultrastructure, anatomy, mechanical properties, and wood growth stress have been evaluated in seven Eucalyptus grandis × Eucalyptus urophylla clones, collected from a region with a high incidence of wind damage. The Pearson correlation coefficient between the tree resistance to breakage and the ratio between the area damaged by the winds and the total planted area was -0.839, showing the efficiency of the methodology adopted and that high breaking strength results in a smaller area affected by wind damage. Trees with a high...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus grandis × Eucalyptus urophylla; Basic density; Cell wall fraction; Cell wall ultrastructure; Fiber; Wood.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100969

INTERCROPPING CORN WITH A COMBINATION OF TREE SPECIES TO CONTROL WEEDS
Provedor de dados: 87
Autores: SILVA,P.S.L.; SILVA,E.M.; SILVA,P.I.B.; FERNANDES,J.P.P.; CHICAS,L.S.
ABSTRACT  The combination of crop residues or crop extracts is often more advantageous in controlling weeds, than the application of each residue or extract singly. This suggests that in intercropping with maize, the combination of tree species can be more advantageous than species isolated in weed control. The objective of this study was to evaluate the effects of intercropping with a combination of leguminous on the weed growth and corn yield. A randomized-block design with split plots (cultivars in plots) and five replicates was established. The cultivars BR 205 and AG 1041 were subject to the following treatments: two weedings (A), intercropping with sabiá (B), gliricidia (C), gliricidia + sabiá (D) and no weeding (E). In the B and C, 30 viable seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gliricidia sepium; Mimosa caesalpiniifolia; Green corn; Grain yield.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400717

Effect of Organic Matter on the Behavior and Control Effectiveness of Herbicides in Soil
Provedor de dados: 87
Autores: TAKESHITA,V.; MENDES,K.F.; ALONSO,F.G.; TORNISIELO,V.L.
ABSTRACT: With extensive use of herbicides in agricultural areas, the risk of contamination of groundwater and surface water by these products has become a worldwide concern. Practices of application or maintenance of soil organic residues that have begun to be used in agriculture for soil nutrition have demonstrated other benefits besides nutrient supplementation, such as reduced mobility and increased soil degradation of herbicides. Because it is the final destination of herbicides, soil and its constituents, especially organic matter in tropical soils, play a prominent role in processes that encompass the dynamics of herbicide molecules. In this context, it is necessary to know the influence of the organic matter and its constituents on the behavior of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorption; Mobility; Biodegradation; Organic carbon.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100304

Phytosociological Survey and Weed Interference in Eggplants Cultivation1
Provedor de dados: 87
Autores: MARQUES,L.J.P.; BIANCO,S.; C. FILHO,A.B.; BIANCO,M.S.
ABSTRACT Eggplants are vegetables of great importance in the South and Southeast regions of Brazil, which are subject to interference from weeds. In order to collaborate with weed management in this vegetable, this study was carried out to determine the periods of weed interference in growing eggplants. The study was conducted in the Brazilian municipality of Jaboticabal, SP, at the Faculty of Agricultural and Veterinary Sciences, UNESP [Universidade Estadual Paulista "Júlio de Mesquita Filho" (São Paulo State University)], in the period from February to July 2013. The experiment was arranged in a randomized block design with 22 treatments, three replications divided in 11 periods of coexistence and weed control with eggplants: 14, 28, 42, 56, 70, 84, 98,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum melongena; Competition; Productivity; Weed community.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200309

Food Recalls and Food Safety Perceptions: The September 2006 Spinach Recall Case
Provedor de dados: 31
Autores: Onyango,   Benjamin M.; Miljkovic,   Dragan; Hallman,   William K.; Nganje,   William E.; Condry,   Sarah C.; Cuite,   Cara L.
This paper examines public perceptions on food safety particularly relating to spinach, which was subject of countrywide recall in 2006. Results indicate that food safety perceptions may be driven by public trust/confidence in institutions whose activities may be directly or indirectly related to food safety. The results further suggest that food safety perceptions may also be related to the type of the product; for example, the public perceives frozen spinach differently from bagged fresh spinach. Additionally, the results show that low levels of objective knowledge about food pathogens and the resulting illnesses have implications on overall food safety.  Results further indicate that females and Caucasians perceived the four types of spinach as safe for...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2007
URL: http://purl.umn.edu/9679

The Interplay of Regulation and Marketing Incentives in Providing Food Safety
Provedor de dados: 31
Autores: Ollinger,   Michael; Moore,   Danna L.
This report examines the impact of process regulations mandated under the Pathogen Reduction/Hazard Analysis and Critical Control Point (PR/HACCP) rule by the Food Safety and Inspection Service of USDA on food safety process control. The current level of food safety found in U.S. meat and poultry food products is a result of process and performance regulations and management-determined actions brought about by market incentives. Processing regulations include sanitation and other tasks related to food safety; management-determined actions include capital investment and other actions independent of process regulations, but possibly driven by performance standards. Performance standards—regulations that allow manufacturers to reach an acceptable level of...
Tipo: Report
Palavras-chave: Food safety; Process regulations; Hazard Analysis and Critical Control Point (HACCP) rule; Food safety regulations; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Institutional and Behavioral Economics.
Ano: 2009
URL: http://purl.umn.edu/55837

A taxonomy survey of decision support systems in agriculture
Provedor de dados: 31
Autores: Manos,   Basil D.; Ciani,   Adriano; Bournaris,   Thomas; Vassiliadou,   I.; Papathanasiou,   J.
This paper presents the results of a research concerning the type, category and fields of applications of Decision Support Systems (DSS) and their contribution to decision-making in agriculture, mainly in the fields of planning and management of farms, farm regions and agricultural resources. More specifically, the paper includes a taxonomy survey that has been based on an analysis of all published works on applications of DSS from 1987 to 2001, as well as a categorized presentation of these applications. The relevant classification of DSS is made by treating subject (theoretical DSS or applicative), the source of publication (proceedings, scientific journal or dissertation), the type of DSS (Decision Support System, Expert System or Knowledge Based DSS),...
Tipo: Journal Article
Palavras-chave: Risk and Uncertainty.
Ano: 2004
URL: http://purl.umn.edu/26406

Contract System for Circulation of the Right to Rural Land Contractual Management
Provedor de dados: 31
Autores: Cao,   Wu-Kun; Wu,   De-En.
From the perspective of civil subject theory, law of value, comparative law and history of laws, the thesis expounds that the contract on the transfer of the contractual right of rural lands is in nature a civil contract instead of an administrative one. Then it explores the defects in the contract from the viewpoint of legal value goal, contract law and legal sociology, that is, the relevant provisions in Rural Land Contract Law and Explanations of Supreme People’s Court about the Issues concerning the Laws Applicable to the Trial of Cases of Disputes over Rural Land Contracting go against the principle of free contracting and run counter to the legal value goal of justice, so they do not achieve good implementing effect. Finally, the thesis demonstrates...
Tipo: Journal Article
Palavras-chave: Rural lands; Contractual management right; Circulation means; Contract system; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/97636

EQUILIBRIUM AND EFFICIENT LAND-USE ARRANGEMENTS UNDER SPATIAL EXTERNALITY ON A LATTICE
Provedor de dados: 31
Autores: Saak,   Alexander E.
Many cases of externalities in agricultural production, such as pesticide drift, cross-pollination, and offensive odors, are attributable to the incompatibility of neighboring land uses and exhibit distance dependence. We characterize equilibrium spatial patterns of externality-generating and -receiving land uses on a two-dimensional lattice with noncooperative, profit-maximizing producers. In equilibrium, generators or recipients form one or more neighborhoods with certain geometric properties, depending on how an externality dissipates with distance and whether there is an externality generated outside the region's boundaries. Efficient land-use arrangements maximize social welfare subject to the implementability constraints stipulating that no...
Tipo: Working or Discussion Paper
Palavras-chave: Graph partitioning; Land-use arrangement; Spatial externality; Supermodular game; Land Economics/Use.
Ano: 2004
URL: http://purl.umn.edu/18501

Euro-Mediterranean Supply Chain Developments and Trends in Trade Structures, in the Fresh Fruit and Vegetable Sector
Provedor de dados: 31
Autores: Kalaitzis,   Prodromos; van Dijk,   Gert; Baourakis,   George.
Supply chains for fresh fruit and vegetables, are going through considerable re-shaping phase worldwide. This study analyses the trends which impose those changes and focuses mainly at the wholesale and export trading of the Euro-Mediterranean supply chain (namely, on how fruit and vegetable producer, wholesale and export firms react to the market forces that direct them). Producer organizations and wholesale firms one the one hand of The Netherlands, Germany and other EU member countries, and of Non- EU Member Mediterranean countries, on the other hand, are the subject of this study. Two graphical representation of the Dutch and the German supply chains respectively are presented here as the main instrument to demonstrate the dynamics of the sectors...
Tipo: Conference Paper or Presentation
Palavras-chave: Euro-Med Free Trade analysis; Supply chain restructure; Supply chain efficiency; Fresh fruit and vegetables trade; Vertical coordination; Industrial Organization; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/9428

Social Benefits of Multifunctional Agriculture in Finland
Provedor de dados: 31
Autores: Yrjola,   Tapani; Kola,   Jukka.
This study aims at assessing the costs and benefits of multifunctional agriculture, and it is one of the very first studies using a quantitative approach to this new subject. The starting point is that if current farm subsidies are regarded as means to maintain the multifunctional characteristics of agriculture, what happens if subsidies are reduced. The effects of the decline in agricultural support on multifunctional characteristics of agriculture in Finland are estimated using the cost-benefit analysis (CBA). Only a part of the consequences can be assessed by the CBA due to lack of data on the economic value of many elements of multifunctional agriculture. Hence, the results should not be generalised too strongly, but they still provide useful...
Tipo: Conference Paper or Presentation
Palavras-chave: Multifunctional agriculture; Non-market benefits; Externalities; Cost-benefit analysis; Finland; Institutional and Behavioral Economics.
Ano: 2002
URL: http://purl.umn.edu/24812

The Excitement and Value of Discovering Tourism Economics: Clem Tisdell's Journey
Provedor de dados: 31
Autores: Tisdell,   Clement A.
Outlines how Clem Tisdell came to discover tourism economics and charts the basic route that he followed in developing that interest. This article is developed by first considering his early years (1939 to 1960), that is the period prior to his commencement of postgraduate studies at the Australian National University, then his postgraduate studies at the Australian National University (1961-1963), and his lecturing appointment at this university in the period 1964-1972. It was towards the end of this period that his research interests started to change significantly and provided a springboard for his later focus on tourism economics and the environment. It was during his appointment as Professor of Economics at the University of Newcastle (1972-1989) that...
Tipo: Working or Discussion Paper
Palavras-chave: China; Ecological economics; Economic development; Environmental economics; India; Nature-based tourism; Sustainable tourism; Tourism economics; Wildlife conservation.; Environmental Economics and Policy; Teaching/Communication/Extension/Profession; F18; L83; O10; Q5.
Ano: 2010
URL: http://purl.umn.edu/90631

PROCUREMENT RISKS AND STRATEGIES TO IMPROVE QUALITY CONSISTENCY IN WHEAT SHIPMENTS
Provedor de dados: 31
Autores: Wilson,   William W.; Dahl,   Bruce L.
Consistency of functional characteristics in wheat is a concern confronting buyers and sellers.  This research analyzes the cost and risk of different procurement strategies for importers.  A stochastic simulation model is used to determine the  probability of a functional characteristic being satisfied subject to quality targets and costs for alternative purchase strategies (purchase by protein only, variety, location, variety by location, or functional tests).  Joint probabilities of meeting specifications and costs were determined for the alternative purchase strategies.  Stochastic dominance was used to determine which purchase strategies dominate others, and stochastic efficiency was utilized to determine the degree of preference.  Results indicate...
Tipo: Working or Discussion Paper
Palavras-chave: Buying Strategies; Location; Variety; Functional Characteristic Tests; Costs; Risks; Simulation; Stochastic Dominance; Crop Production/Industries; Risk and Uncertainty.
Ano: 2007
URL: http://purl.umn.edu/23498

The Prospects and Challenges of Information Retrieval by University Students: A case study of Post Graduate Students of the University of Ghana, Legon
Provedor de dados: 31
Autores: Fordjour,   R.; Badu,   E.E.; Adjei,   E.
The poor performance of students in the various universities has been attributed to the inability of students to effectively retrieve information for academic work. The purpose of the study was to investigate the prospects and challenges of information retrieval among university students. The survey research method was used to investigate the awareness and use of information retrieval systems, document retrieved and its relevance to student’s information need, challenges of information retrieval among students and future expectation of information retrieving skills by students. Three student faculties in the University of Ghana, Legon participated in the study. A questionnaire consisting of 29 items was used as an instrument for collecting data. The...
Tipo: Conference Paper or Presentation
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2010
URL: http://purl.umn.edu/96831

Temporal Insensitivity of Willingness to Pay: How do they evaluate in CVM?
Provedor de dados: 31
Autores: Kim,   Sooil; Haab,   Timothy C.
In addition to scope and scale embedding effects, temporal insensitivity of willingness to pay, also known as temporal embedding effect, has been a well known anomaly in eliciting willingness to pay for environmental quality change, especially over time. Stevens et al. (1997) defines two types of temporal embedding effects: strong insensitivity and weak insensitivity to payment schedule. This paper proposes an alternative definition of the temporal insensitivity. Temporal insensitivity implies that a subject in the survey responds consistently to value elicitation questions regardless of payment schemes. The sequential test tests the temporal insensitivity using the oyster reef restoration programs in Chesapeake Bay. Test results show that willingness to...
Tipo: Conference Paper or Presentation
Palavras-chave: Temporal insensitivity of willingness to pay; Temporal embedding effect; Implicit discount rate; Sequential test; Demand and Price Analysis.
Ano: 2007
URL: http://purl.umn.edu/9972

Changing Food Purchasing and Consumption Habits among Urban Middle-Classes in Hyderabad
Provedor de dados: 31
Autores: Lohr,   Kerstin; Dittrich,   Christoph.
This preparatory case study provides an overview on the issue of changing food purchasing and food consumption habits among urban middle-classes in the South Indian emerging mega-city of Hyderabad. It analyses how food purchasing and dietary habits in this specific urban stratum are subject to profound changes due to increasing spending capacity and changing lifestyles in the context of economic liberalisation and globalisation processes. Another objective of the study examines health aspects of the changing food consumption habits. While nutrition research previously focused on the serious problem of undernutrition- related nutrient deficits, recent data shows that overweight and nutrition-related chronic diseases are more and more becoming serious...
Tipo: Report
Palavras-chave: Urban food problems; Urban middle-class; Hyderabad; Agricultural and Food Policy; Community/Rural/Urban Development; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/36908

Optimal Bioeconomic Management Strategies for Prevention and Control of Invasive Alien Species
Provedor de dados: 31
Autores: Mehta,   Shefali V.; Homans,   Frances R.; Haight,   Robert G.; Polasky,   Stephen.
Paper removed by author. Please see the current version, available online January 8, 2007: Mehta, S.V. et al. Optimal detection and control strategies for invasive species management. Ecological Economics (2007), doi:10.1016/j.ecolecon.2006.10.024
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/19505

ACHIEVING EFFICIENCY AND EQUITY IN IRRIGATION MANAGEMENT: AN OPTIMIZATION MODEL OF THE EL ANGEL WATERSHED, CARCHI, ECUADOR
Provedor de dados: 31
Autores: Evans,   Elizabeth M.; Lee,   David R.; Boisvert,   Richard N.
The objective of this paper is to address the problems of inefficiency and inequity in water allocation in the El Angel watershed, located in Ecuador's Sierra region.  Water is captured in a high-altitude region of the watershed and distributed downstream to producers in four elevation-defined zones via a system of canals.  Upstream and downstream producers face radically different conditions with respect to climate and terrain.  A mathematical programming model was created to study the consequences of addressing chronic water scarcity problems in the watershed by shifting water resources between the four zones.  The model captures the nature of water use by humans, crops and dual purpose cattle.  Its objective function maximizes producer welfare as...
Tipo: Conference Paper or Presentation
Palavras-chave: Mathematical programming; Water allocation; Efficiency; Equity; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/19742

POLÍTICAS DE SEGURIDAD ALIMENTARIA RECIENTES EN AMÉRICA LATINA
Provedor de dados: 31
Autores: Almeida Filho,   Niemeyer; Ortega,   Jorge.
Este artículo hace un análisis sobre la evolución reciente que han tenido las políticas de seguridad alimentaría en América Latina. Así mismo, pretende mostrar la naturaleza de estas políticas y aportar nuevos elementos para discutir sus limitaciones y potencialidades. El orden de los secciones corresponde a distintos niveles de determinación que operan en las políticas de seguridad alimentaría. En la primera sección se discutirá el tema de las jerarquías la acción del Estado y de las políticas sociales. Se abordará el proceso de regulación social y el rol del Estado, pudiéndose evaluar los límites políticos a las acciones sociales En la segunda sección, se profundizará en la política de seguridad alimentaría como tal. Para esto se mostrará tanto su...
Tipo: Conference Paper or Presentation
Palavras-chave: Seguridad alimentaría; Políticas sociales; América Latina; Social policies; Latina America; Food Security and Poverty.
Ano: 2008
URL: http://purl.umn.edu/106111

Assessment of Kenya's Domestic Horticultural Production and Marketing Systems and Lessons for the Future
Provedor de dados: 31
Autores: Tschirley,   David L.; Ayieko,   Miltone W.
After reviewing trends in the production and marketing of fresh produce for the domestic market in Kenya since 1997, this paper presents detailed information on the structure of the flow of this produce from rural areas to wholesale markets in Nairobi and from those wholesale markets to assorted retail markets. Market shares are estimated by product for geographic areas supplying Nairobi, and for each important wholesale and retail market in the city. It is found that horticultural production for the domestic market is keeping up with rural population growth but not with the much faster urban population growth. The urban wholesaling and retailing system has decentralized dramatically and with little planning over the past two decades in response to lack of...
Tipo: Report
Palavras-chave: Africa; Horticulture; Market; Production; Crop Production/Industries; Q13.
Ano: 2008
URL: http://purl.umn.edu/55431

Meat Consumption Patterns and Intentions for Change Among Finnish Consumers
Provedor de dados: 31
Autores: Latvala,   Terhi; Niva,   M.; Makela,   Jarmo; Pouta,   Eija; Heikkila,   Jaakko; Koistinen,   Laura; Forsman-Hugg,   Sari; Kotro,   Jaana.
During the past few decades, meat has increasingly become a subject of controversies relating to health and safety, environment, and animal welfare. Even though these changes in perceptions of meat are not yet visible in aggregate consumption figures, they can be observed in individual consumption patterns and as intentions to change the consumption. In this study, we examine changes in meat consumption among the Finnish consumers taking into account both stated changes in the past and intended changes in the future. Based on these changes, we identify consumer segments and investigate in which ways these segments differ from each other socio-demographically and with respect to current meat consumption and the stated reasons for the change. The latent...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Consumption/Nutrition/Food Safety; Livestock Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/114393

Upstream Pollution, Downstream Waste Disposal, and the Design of Comprehensive Environmental Policies
Provedor de dados: 31
Autores: Walls,   Margaret; Palmer,   Karen L.
Many environmentalists and policymakers are shifting their focus from media-specific pollution problems to product-specific, life-cycle environmental problems. In this paper, we develop a model of production and consumption that incorporates life-cycle environmental externalities-specifically, an upstream manufacturing byproduct, air or water pollution from manufacturing, and downstream solid waste disposal. We then use the model to derive optimal government policies to address all three externalities. We assume throughout that a Pigovian tax on waste disposal is precluded because of the potential for illegal dumping. We then examine four cases: one in which Pigovian taxes on the upstream externalities are feasible, one in which such taxes are infeasible,...
Tipo: Working or Discussion Paper
Palavras-chave: Life-cycle externalities; Solid waste; Deposit-refund; Environmental Economics and Policy; Q28.
Ano: 2000
URL: http://purl.umn.edu/10837

Agricultural policies and farm structures - Agent-based modelling and application to EU-policy reform
Provedor de dados: 31
Autores: Happe,   Kathrin.
The development of competitive and efficient agricultural structures has been one of the central goals of agricultural policy making in addition to ensuring a fair standard of living for farmers. To achieve these goals, the agricultural sector in most industrialised nations has long been the subject of government interven-tions. However, many agricultural policies have worked counteractively to these goals by creating distortions in the use of resources. Against this background, the emergence of new and innovative modelling methods such as agent-based models, in addition to ever-increasing computing capacities has offered new possibilities to model adjustment reactions and to quantify the impact of agri-cultural policies.  This thesis takes up these new...
Tipo: Report
Palavras-chave: Agricultural and Food Policy.
Ano: 2004
URL: http://purl.umn.edu/14945

International Product Differentiation through a Country Brand: An Economic Analysis of National Branding as a Marketing Strategy for Agricultural Products
Provedor de dados: 31
Autores: Innes,   Brian G.; Kerr,   William A.; Hobbs,   Jill E.
Trade policy initiatives of developed country governments are in flux. Governments’ need for new trade policy measures has arisen partly because of constraints imposed on the use of export subsidies by the Agreement on Agriculture reached as part of the Uruguay Round of General Agreement on Tariffs and Trade in 1994. Further disciplines on export subsidies and other policy measures may be agreed on in the Doha Round of World Trade Organization (WTO) negotiations, accentuating the need for new policy measures. While the Doha Round may not successfully reach an agreement, the current modalities show provisional agreement on the elimination of multiple forms of export subsidies. There is provisional agreement on more stringent restrictions on the use of...
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/6131

Optimisation methods for assisting policy decisions on endemic diseases
Provedor de dados: 31
Autores: Stott,   Alistair W.
Endemic disease of animals is an economic problem as it deprives humans of scarce resources that might otherwise satisfy human wants. Optimisation methods identify the strategies that minimise this economic problem. Given the potentially vast extent of the deprivation, not only in terms of lost wealth but also in terms of animal welfare, human health and environmental damage, this subject offers great benefits to decision-makers from the individual farm to the global level. This paper uses examples to illustrate the basic economic principles concerned. It shows how these principles may be extended to deal with current limitations in theory and practice. Lack of data is a common problem that may be dealt with by using computer simulation, theoretical...
Tipo: Working or Discussion Paper
Palavras-chave: Economics; Decision analysis; Optimisation; Modelling; Endemic disease; Knowledge transfer; Health Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/46000

ESTIMATING THE OPPORTUNITY COST OF LABOR IN PROJECT ANALYSIS AND COMPARATIVE ADVANTAGE STUDIES:  A CRITIQUE AND APPLICATION IN THE CONTEXT OF DISEQUILIBRIUM
Provedor de dados: 31
Autores: Kelly,   Valerie A.
This study presents a critical analysis of procedures currently used to estimate the opportunity costs of unskilled labor in developing countries.  The issue is particularly germane today.  Economic analysis is playing an increasingly important role in most developing country agricultural and industrial production.  Many labor markets, however, remain relatively thin and subject to a variety of market distortions which render the job of the economic analyst extremely difficult.  In light of these conditions, this research aims to accomplish the following three objectives:  1)  To critically evaluate methods currently used for estimating opportunity costs of labor and the adherence of these methods to the underlying dictates of economic theory;  2)  To...
Tipo: Thesis or Dissertation
Palavras-chave: Labor and Human Capital.
Ano: 1984
URL: http://purl.umn.edu/11256

Pre- and post-accession performance to the WTO: A vulnerability study of Jamaica’s beef industry
Provedor de dados: 31
Autores: Seepersad,   Govind; Felix,   Nkosi; Maharaj,   Omardath.
Bridgetown, Barbados 6th – 10th July, 2009
Tipo: Presentation
Palavras-chave: WTO; Jamaica; Beef Industry; Vulnerability Index; Agribusiness; Q13.
Ano: 2010
URL: http://purl.umn.edu/122658

PRICE INTEGRATION IN MERCOSUR COUNTRIES: A FRACTIONAL COINTEGRATION ANALYSIS
Provedor de dados: 31
Autores: Mohanty,   Samarendu; Peterson,   E. Wesley F.; Smith,   Darnell B.
This paper examines price integration in the MERCOSUR countries of Argentina and Brazil after the creation of this regional economic agreement using a fractional cointegration analysis.  The results suggest that Argentine wheat and corn prices are fully cointegrated with the corresponding world prices, whereas Brazilian wheat prices are not cointegrated with the world price.  These results support the idea that, for these markets, MERCOSUR is operating more like a free trade area than a customs union with harmonized trade policies.  In case of soybean, neither soybean price is integrated with the world price, implying that both countries are pursuing similar export strategies that have the effect of isolating these markets from the world markets.  Within...
Tipo: Conference Paper or Presentation
Palavras-chave: Demand and Price Analysis; International Relations/Trade.
Ano: 1998
URL: http://purl.umn.edu/20954

Climatic variability and cooperation in rangeland management: a case study from Niger
Provedor de dados: 31
Autores: McCarthy,   Nancy; Vanderlinden,   Jean-Paul.
In this paper, we develop an empirical model of an agro-pastoral system subject to high climatic risk to test the impact of rainfall variability on livestock densities, land allocation patterns and herd mobility observed at the community level. Also, because grazing land is a common-pool resource, we determine the impact of cooperation on these decision variables. To capture different abilities of communities to manage these externalities, we construct indices comprised of factors considered to affect the costliness of achieving successful cooperation found in the collective action literature. We then test hypotheses regarding the impact of rainfall variability and cooperation using data collected in a semi-arid region of Niger. Results indicate that...
Tipo: Working or Discussion Paper
Palavras-chave: Rangelands; Environmental risk; Natural resource management; Pastoralism; Collective action; Cooperation; Institutions; Livestock stocking densities; Mobility; Niger; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/50058

Demand for livestock products in developing countries with a focus on quality and safety attributes: Evidence from case studies
Provedor de dados: 31
The case studies and the synthesis papers were presented at a mini-symposium at the International Association of Agricultural Economists conference held in Beijing, Peoples Republic of China, on 18–24 August 2009.
Tipo: Report
Palavras-chave: Demand; Livestock products; Quality; Safety; Developing countries; Consumer/Household Economics; Livestock Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/97973

SCHOOL INPUTS AND EDUCATIONAL OUTCOMES IN NORTH CAROLINA: COMPARISON OF STATIC AND DYNAMIC ANALYSES
Provedor de dados: 31
Autores: Walden,   Michael L.; Sisak,   Mark R.
The relationship between student achievement and school inputs has long been a subject of academic research.  The general conclusion of past research is that school inputs, such as the number of teachers relative to pupils, has little impact on student academic outcomes.  This paper provides a fresh look at this issue.  Seventeen alternative measures of student performance in North Carolina school districts are related to a wide array of school policy inputs and socioeconomic characteristics of students and their families.  Both static and dynamic analyses are performed.  The key findings are (1) the school policy inputs significantly related to student achievement vary by the measure of student achievement used, (2) the joint contribution of school policy...
Tipo: Journal Article
Palavras-chave: Public education; Student achievement; Public Economics.
Ano: 1999
URL: http://purl.umn.edu/15155

Measuring Research on County Agricultural Technological Innovation Ability Index
Provedor de dados: 31
Autores: Ma,   Lihua; Yan,   Huizhe; Yan,   Pingjian.
Taking the mechanism of technological construction guidance theory and mode which consists of “objective-construction-evaluation-construction-objective” as a starting point, on the basis of county agricultural technological innovation ability and its index definition, this paper researches the constructing system of county agricultural technological innovation ability. Firstly, on the basis of defining county agricultural technological innovation ability and the definition of index, according to the principle of purposefulness, scientificity , systematicness, integration of dynamic state and static state, integration of quantitativeness and qualitativeness and so on, we construct the multi-level measuring system of county agricultural technological...
Tipo: Journal Article
Palavras-chave: County agriculture; Technological innovation ability; Index measuring; AHM; Unascertained mathematics; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/118223

Modelling the Fiscal Effects of Aid: An Impulse Response Approach for Ghana
Provedor de dados: 31
Autores: Morrissey,   Oliver; Osei,   Robert; Lloyd,   Tim A.
An important feature of aid to developing countries is that it is given to the government. As a result aid has the potential to affect budgetary behaviour. Although the (albeit limited) aid-growth literature has addressed the effect of aid on policy, it has tended to neglect the effect of aid on the fiscal behaviour of governments. While fiscal response models have been developed to examine the effects of aid on fiscal aggregates - taxation, expenditure and borrowing - the underlying theory is ad hoc and empirical methods used are subject to severe limitations. This paper applies techniques developed in the "macroeconometrics" literature to estimate the dynamic structural relationship between aid and fiscal aggregates. Using vector autoregressive methods,...
Tipo: Working or Discussion Paper
Palavras-chave: Aid; Fiscal Response; Ghana; International Development; International Relations/Trade; F35; O23; O11; O55.
Ano: 2002
URL: http://purl.umn.edu/26226

Policy Instruments and Agricultural Water Allocation in the Bow River Basin of Southern Alberta
Provedor de dados: 31
Autores: He,   Lixia; Horbulyk,   Theodore M.
In Southern Alberta, agriculture is the largest water user.  Thirteen irrigation districts plus numerous private irrigators hold licenses to withdraw more than 75% of the available surface water.  Water use decisions made by farmers in irrigation districts have significant impacts on the productivity of water use and on environmental outcomes (instream flow needs) throughout the South Saskatchewan River Basin (SSRB), especially during periods of drought.   The objective of this paper is to investigate current and alternative water allocation strategies and their effects on crop choices with a focus on the irrigation districts in the Bow River Sub-basin of the SSRB.  A mathematical programming model is developed to optimize economic returns from crop...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/21240

Intentions, Information, and Convenience: An Empirical Analysis of their Effect on the American Diet and Demand for Meat
Provedor de dados: 31
Autores: Mancino,   Lisa; Dietz,   Brian.
The purpose of this paper will be to develop and present a new approach for examining the demand for meat by incorporating many of the advances in behavioral economics. By providing a closer approximation to how consumers actually behave, doing so should improve upon existing models. Incorporating findings from behavioral studies will also provide a richer theoretical basis to correct for the longstanding problem of endogeniety in cross-sectional studies. The theoretical model in this study begins with the Becker household production model, where individuals are assumed to maximize utility, subject to their production functions, budget constraint and time constraint. To develop a model that more accurately depicts how individual's make their food choices,...
Tipo: Conference Paper or Presentation
Palavras-chave: Meat Demand; Behavioral Economics; Information and Nutrition; Demand and Price Analysis.
Ano: 2002
URL: http://purl.umn.edu/24944

The Trade Effects of MERCOSUR and The Andean Community on U.S. Cotton Exports to CBI countries
Provedor de dados: 31
Autores: Yeboah,   Osei-Agyeman; Shaik,   Saleem; Batson,   Seon.
The United States engagement in nonreciprocal preferential trade arrangements has been proliferating with several developing countries throughout the past couple of decades. One of the oldest and more successful of these arrangements has been the Caribbean Basin Initiative (CBI).The CBI is a general term used to refer to the Caribbean Basin Economic Recovery Act of 1983 (CBERA), the Caribbean Basin Economic Recovery Expansion Act of 1990 (CBERA Expansion Act), and the Caribbean Basin Trade Partnership of 2000 (CBTPA) (Ozden and Sharma 2006). The central premise behind the plan was that, by encouraging the CBI countries to become more open and liberal, trade would expand – and eventually translate into economic development and growth (Deere, 1990). The...
Tipo: Conference Paper or Presentation
Palavras-chave: Panel data; Trade diversion; Trade creation; CBI; Cotton imports; Agricultural and Food Policy; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/46028

Coastal planning in North Shore City, New Zealand: Developing responsible coastal erosion policy
Provedor de dados: 31
Autores: Wilson,   Amanda.
North Shore City’s coastline has been subject to intensive development pressure over the last 15 years. In this time, new developments have established along previously undeveloped areas of coastline and existing sites have redeveloped with much larger houses. This paper provides a description of the planning controls that currently affect coastal development and an assessment of the effectiveness of these controls. This is followed by an analysis of the role of local government in controlling future development. Contention arises when attempts are made to control the property rights of landowners to protect their properties from coastal erosion. The impacts of private coastal protection works on the coastline have wider impacts than their immediate...
Tipo: Conference Paper or Presentation
Palavras-chave: Coast; Erosion; Planning; Cost; Benefit; Development; Protection; Structures.; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/59260

Protecting the Booroolong Frog in the Namoi Catchment: A Cost-Benefit Analysis
Provedor de dados: 31
Autores: Greyling,   Tertius; Bennett,   Jeffrey W.
The Booroolong frog project in the Namoi Catchment represents an environmental investment to protect the species and around 10.7 kilometres of its habitat in the catchment. The project’s benefit-cost ratio (BCR) of 8.6 indicates that the benefits outweigh the costs by a significant margin. The measures introduced by landholders, at relatively low cost, should therefore result in a significant return on investment upon project completion in 10 years time. The benefits are estimated using a choice modelling study which was recently developed for the valuation of investment in natural resource management in the Namoi Catchment. As this is a largely ex ante cost-benefit analysis, the BCR is subject to uncertainty associated with assumptions which had to be...
Tipo: Report
Palavras-chave: Cost-benefit analysis; Benefit-cost ratio; Choice modelling; Booroolong Frog; Namoi Catchment; Environmental Economics and Policy; Research Methods/ Statistical Methods.
Ano: 2011
URL: http://purl.umn.edu/107851

Impact Assessment of Food Policy Research - A Stocktaking Workshop: Synthesis Report
Provedor de dados: 31
Autores: Anderson,   Jock R.; Bos,   Maria Soledad; Cohen,   Marc J.
This stocktaking workshop provided an opportunity for several groups with active interest in impact assessment relating to agricultural policy research to share experiences and views about what constitutes good practice in this field. The sponsoring organizations have had a long-standing concern for the relevance and effectiveness of agricultural and food policy research in general and at IFPRI in particular. That concern has been addressed in past meetings and the time seemed right for a further stocktaking. The focus of this 2004 meeting was on impact assessment experience at IFPRI. IFPRI has, since the mid-1990s, carried out a variety of activities aimed at assessing the impact of its policy research, capacity strengthening, and policy communications...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy.
Ano: 2005
URL: http://purl.umn.edu/42480

Management of climate risks in the wine sector: a field study on risky behaviour
Provedor de dados: 31
Autores: Ben Salk,   Sana; Blondel,   Serge; Daniel,   Christophe; Deffains-Crapsky,   Catherine; Jutard,   Catherine; Sejourne,   Bruno.
In agriculture, there is need for a deeper analysis of management of climate risks, because the farmers appear to have a paradoxical position: they perceived that they are strongly exposed to climate risks but, they do not want to pay for adapted tools, arguing that this is too expensive or complex. However, under risk, it is well-known that the decision-makers could be subject to paradox (Allais for example). Our assumption is that to know better the behaviours of farmers in general risky situations will help to understand their reluctance to use the weather market. We conducted a study over the wine growers in the Maine-et-Loire department. 60 wine growers have responded to the questionnaire about climate risk management, and 29 amongst them have...
Tipo: Conference Paper or Presentation
Palavras-chave: Expected utility; Field experiments; Management of climate risks; Paradoxes; Crop Production/Industries; Environmental Economics and Policy; Risk and Uncertainty.
Ano: 2007
URL: http://purl.umn.edu/9251

THE DEVELOPMENT OF THE TEACHING ON AGRICULTURAL MARKETS IN RUSSIA FROM THE 18TH TO THE 20TH CENTURY
Provedor de dados: 31
Autores: Shaikiu,   Doz W.W.; Wandel,   Jurgen.
The transition to market principles in Russia’s agro-food sector forced the country’s agricultural institutes of higher education to adapt their curriculum to the new economic system. This included the introduction of the subject "studies of agricultural markets". The paper shows that until the collectivization of agriculture in the early 1930s Russia did, in fact, have an own tradition in this discipline, which was influenced by well-known Russian economists like Chaynov and Kondratyev.
Tipo: Working or Discussion Paper
Palavras-chave: Россия; Учение о сельскохозяйственных рынках; История науки; Russland; Landwirtschaftliche Marktlehre; Wissenschaftsgeschichte; Russia; Teaching on agricultural markets; History of science.; Institutional and Behavioral Economics; International Development; Political Economy; Public Economics; Research Methods/ Statistical Methods; Teaching/Communication/Extension/Profession; B 0.
Ano: 2009
URL: http://purl.umn.edu/91765

European Chemical Policy and the United States: The Impacts of REACH
Provedor de dados: 31
Autores: Ackerman,   Frank; Stanton,   Elizabeth A.; Massey,   Rachel.
The European Union is moving toward adoption of its new Registration, Evaluation and Authorization of Chemicals (REACH) policy, an innovative system of chemicals regulation that will provide crucial information on the safety profile of chemicals used in industry. Chemicals produced elsewhere, such as in the United States, and exported to Europe will have to meet the same standards as chemicals produced within the European Union. What is at stake for the U.S. is substantial: we estimate that chemical exports to Europe that are subject to REACH amount to about $14 billion per year, and are directly and indirectly responsible for 54,000 jobs. Revenues and employment of this magnitude dwarf the costs of compliance with REACH, which will amount to no more than...
Tipo: Working or Discussion Paper
Palavras-chave: Demand and Price Analysis; Health Economics and Policy; Industrial Organization; International Relations/Trade; Political Economy; Production Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/37242

Consumers' attitudes toward ethical food: Evidence from social farming in Italy
Provedor de dados: 31
Autores: Carbone,   Anna; Gaito,   Marco; Senni,   Saverio.
Agriculture seems to be capable to foster rehabilitation, work integration and social inclusion of vulnerable people: persons with mental disabilities, people with burn out, long-term unemployed, individuals with an addiction history, and so on. "Social farms", i.e. farms that provide these kind of services, are present in several European countries and their number is growing. The emerging interest of an increasing number of consumers for the "ethical quality" of products suggests that the social functions of these farms could be remunerated, although partially, by the market. The paper discusses the issues mentioned above and focuses on some empirical evidence on consumers' beliefs and attitude about social farms' products. Data are collected through a...
Tipo: Conference Paper or Presentation
Palavras-chave: Ethical Consumption; Social Farming; Consumers Buying Groups; Food Consumption/Nutrition/Food Safety.
Ano: 2006
URL: http://purl.umn.edu/10029

Poverty, Political Failure and the Use of Open Access Resources in Developing Countries
Provedor de dados: 31
Autores: Tisdell,   Clement A.
This paper begins by distinguishing open-access resources from common-property resources, the use of which is subject to communal rules.  In practice, it is suggested that these cases are the outcomes of a spectrum of property rights.  The standard economic theory of the use of open-access resources as developed by Western economists is outlined and ways in which it has limited applicability to developing countries are suggested.  This theory does not, for example, consider the possibility that incomes in open-access situations may fall to subsistence levels, as appears to be common in developing countries.  A model is presented in which the long-run equilibrium involves a subsistence level of income which may be at or near a poverty level.  This seems...
Tipo: Working or Discussion Paper
Palavras-chave: Poverty; Common-property resources; Open-access resources; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/55094

MULTIFUNCTIONALITY OF AGRICULTURE, PUBLIC POLICIES AND SCIENTIFIC EVIDENCES: SOME CRITICAL ISSUES OF CONTEMPORARY CONTROVERSIES
Provedor de dados: 31
Autores: Laurent,   Catherine E.; Berriet-Solliec,   Marielle; Kirsch,   Marc; Labarthe,   Pierre; Trouve,   Aurelie.
Various theoretical models of public policy analysis are used to treat situations of decision-making in which public deciders have to take into account the multifunctionality of agriculture. For some, science-society relations are not really problematical. Others acknowledge the current attempts of these policy-makers to find adequate scientific knowledge, and the difficulties they encounter. These difficulties stem partly from the very content of knowledge produced by research. Could other modes of production be more efficient? The status of the knowledge produced by these approaches is a subject of debate. Bridging the divide between science and policy more effectively is not only a question of knowledge brokerage. Accessibility and reliability of the...
Tipo: Journal Article
Palavras-chave: Multifunctionality; Agriculture; Knowledge; Policy; Sustainable development; Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/91112

Evaluation of CO2 Emissions by Kansas Agribusiness Retailers
Provedor de dados: 31
Autores: Canales,   Elizabeth; Boland,   Michael A.
Greenhouse gas (GHG) emissions and their negative effect on the environment is a growing concern in the world. It is estimated that agriculture is responsible for 7% of the total GHG emissions in the United States.  Currently, environmental policies to regulate GHG are in place in different countries and are expected to increase in the future. The objective of this study was to estimate carbon dioxide-equivalent emissions from eight agribusiness retailers in Kansas. Data consisted of energy inputs from the operation of the agribusiness retailers and the crop land these retailers serve. Carbon emission coefficients were employed to determine carbon dioxide-equivalent emissions associated with each energy input used during their operations. Results suggest...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Climate change; Environmental economics; Agribusiness; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/61310

Peculiarities of creation of extra large agricultural companies under conditions of insufficient legislative regulation in Ukraine
Provedor de dados: 31
Autores: Borodina,   Elena.
Agricultural transformations in Ukraine resulted in division of tracts of land and creation of large number of small private land owners. Since December 1999 these processes were developing with especially high speed after adoption of Presidential Decree "On emergency actions aimed at acceleration of reorganization of agricultural sector of economics", which has become fundamental legislative act in conducting land and agricultural reforms. During the first year after adoption of the abovementioned decree, there started development of land market, which ought to have included: private property for land, legislative protection of land rent, possibilities of free transfers of ownership rights for land from one market subject to another (purchasing and...
Tipo: Conference Paper or Presentation
Palavras-chave: Ukrainian agriculture; Agricultural transformations; Land market; Land latifundia; State agricultural policy.; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/10024

SALMOD, a Salinity Management Tool for Irrigated Agriculture
Provedor de dados: 31
Autores: Armour,   R.J.; Viljoen,   Machiel F.
This paper presents an irrigation farm management tool, SALMOD (Salinity And Leaching Model for Optimal irrigation Development), that calculates the profit maximizing crop enterprise composition and irrigation management options for farm specific soil type, drainage status and irrigation system composition subject to various regional control measures and expected irrigation water salinities. After stating the water quality problem, and particularly salinisation in Southern Africa, the input data requirements and the results of SALMOD and their usefulness at farm level, are discussed. The impact of various possible regional or policy regulations are then discussed. SALMOD was developed for irrigators in the lower Vaal and Riet Rivers in South Africa. These...
Tipo: Conference Paper or Presentation
Palavras-chave: Irrigation; Water quality; Return flows; Salinisation; Leaching; Non-point source pollution; On-farm storage; SALMOD; Linear programming; GAMS; Farm Management; Land Economics/Use.
Ano: 2002
URL: http://purl.umn.edu/7012

Suitability Evaluation on the Information Service System of “Agricultural Science and Technology 110” in Sichuan Province, China
Provedor de dados: 31
Autores: Hu,   Yu-fu; Deng,   Liang-ji.
Method of fuzzy comprehensive evaluation is used to carry out suitability evaluation on the information service system of “Agricultural Science and Technology 110” in Sichuan Province, China. Analytic hierarchy process (AHP) and expert consultation method are used to determine the evaluation index system and index weight. Suitability effect of the information service system of “Agricultural Science and Technology 110” is taken as the target layer. The five indices at criterion layer are the organizational mode of agricultural information service, the support system of agricultural information resources, the agricultural information transfer system, the capital source of agricultural information service, and the support system of agricultural information...
Tipo: Journal Article
Palavras-chave: Agricultural Science and Technology 110; Agricultural information; Service system; Fuzzy comprehensive evaluation; Sichuan Province; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/97992

VALOR AGREGADO EN AGROPRODUCTOS COMO ORIENTACIÓN DE LA INVESTIGACIÓN AGROPECUARIA Y FORESTAL EN MÉXICO: PRESENTE Y PROSPECTIVA
Provedor de dados: 31
Autores: Moctezuma Lopez,   Georgel; Espinosa Garcia,   Jose Antonio; Tapia Naranjo,   Cruz Alfredo.
Prospective vision research project to influence decisions maker's aware in the strategic vision research to public and private sectors to fortification actions in aggregate value to vegetal and animal products to forestry, agricultural and livestock sector using to evaluation the 58 expert's judgment (Delphi method) to different dedicated to agricultural, livestock and forestry research by means of the answer of a structured questionnaire, the used statistical measurement was the median and the values scale at 1 to 10, where 1 means less importance and 10 maximum importance. The selected subjects was 13 and the panellist valued the subject actual and future importance, as well as the anticipate evolution to importance that gives the public and private...
Tipo: Journal Article
Palavras-chave: Actual and future importance; Agricultural; Livestock and forestry research institution; Delphi method; Public and private sectors.; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/114473

Market dynamics and policy reforms in the EU olive oil industry: An exploratory assessment
Provedor de dados: 31
Autores: Mili,   Samir.
Available information indicates that the future competitive scenario for EU olive oil will be shaped by the market dynamics and business strategies, and the ongoing agricultural and trade policy reforms (CAP reform, WTO Doha Round negotiations, regional and bilateral trade agreements). Based on this premise, the purpose of this contribution is to present an overall evaluation of the market change and policy reform processes affecting the EU olive oil sector, pointing out the main strengths, weaknesses, opportunities and threats (SWOT) that can be associated to their present and expected evolution. The analysis is performed with a systemic approach to market and policy changes, under the general hypothesis that these are governed by a series of economic and...
Tipo: Conference Paper or Presentation
Palavras-chave: Globalisation; Market dynamics; Business strategies; Agricultural and trade policy reform; EU olive oil; SWOT analysis; Agribusiness.
Ano: 2006
URL: http://purl.umn.edu/10099

Economic Partnership Agreements and WTO negotiations. A quantitative assessment of trade preference granting and erosion in the banana market
Provedor de dados: 31
Autores: Anania,   Giovanni.
Paper replaced 07/29/09.
Tipo: Conference Paper or Presentation
Palavras-chave: WTO; Economic Partnership Agreements; Trade preferences; Preference erosion; Spatial models; Bananas; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/44215

CONFLICT, CO-OPERATION, AND CULTURE: A STUDY IN MULTIPARTY NEGOTIATIONS
Provedor de dados: 31
Autores: Benson,   Marjorie L.
This paper presents a report and analysis of simulated negotiations in a multiparty institutional context, specifically a Canadian Aboriginal-Crown context.  The purpose is to offer a conceptual model of skills and processes of successful negotiations under such circumstances.  The Aboriginal-Crown subject of the simulation has particular relevance in light of Canada’s Supreme Court declaration in Delgamuukw v. British Columbia, [1997] 3. S.C.R. 1010 at para. 186 (quoting itself from Sparrow v. The Queen, [1990] 1 S.C.R. 1075) that Section 35(1) of the Constitution Act, 1982 “provides a solid basis upon which subsequent negotiations can take place.”  The vehicle of the analysis is participant reflections, which offer a 360-degree view of the simulation,...
Tipo: Working or Discussion Paper
Palavras-chave: Institutional and Behavioral Economics.
Ano: 2002
URL: http://purl.umn.edu/31781

Putting the Spotlight on Attribute Definition: Divergence Between Experts and the Public
Provedor de dados: 31
Autores: Cleland,   Jonelle; McCartney,   Abbie.
One of the key stages of designing a choice experiment is to define the attributes of interest. The attributes chosen essentially influence all subsequent activities carried out in a choice study. Surprisingly, the process of attribute definition is not the subject of critical and ongoing inquiry. In the context of informing policy, the choice modelling literature suggests that a given set of attributes should (1) reflect public interests, (2) have a sound scientific basis, and (3) provide useful information to end-users. Fulfilling all criteria presents a challenging task to researchers. Conflicts between criteria are possible, and there are currently no guidelines to assist researchers in negotiating their way through potentially competing sets of...
Tipo: Report
Palavras-chave: Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/107576

A STUDY OF THE DEMAND FOR BUTTER IN THE UNITED KINGDOM
Provedor de dados: 31
Autores: Candler,   Wilfred V.; Townsley,   Robert.
Statistical estimation of the demand function for most industrial, and many agricultural, products is inhibited by price fixing or price stabilizing arrangements which prevent observation of the full range of possible price-quantity combinations. In the period 1956 to 1961 the London butter market has illustrated how markedly price can fluctuate, when not subject to a stablizing agreement. In the period 1958 to 1961 estimates of retail sales of butter are available, and these permit the estimation of the demand for butter at retail. The time lag between production and consumption decisions means that there is no problem of identification. The present study uses weekly price and quantity information, and there is a serious problem of auto-correlation of the...
Tipo: Journal Article
Palavras-chave: Demand and Price Analysis.
Ano: 1962
URL: http://purl.umn.edu/22456

Interactions Between Food Market Reform and Regional Trade in Zimbabwe and South Africa: Implications for Food Security
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Takavarasha,   T.; van Zyl,   Johan.
A major role of agricultural policy is to identify policy changes that may induce technological innovation and productivity growth throughout the food system, in order to increase the living standards of people who must relate to it in one way or another. While food market reform has been subject to contentious and often emotional debate over the last decade in Africa, the debate has generally been over assumptions about how food markets work in reality as opposed to theory, and how markets actually respond to particular forms of policy change. The lack of consensus is partially due to a shortage of empirical, ground-level information linking specific policies to specific impacts. It is in this context that we draw on applied analysis in Southern Africa to...
Tipo: Report
Palavras-chave: Food security; Food policy; Food market reform; Regional trade; International Relations/Trade; Marketing; Downloads May 2008-July 2009: 35; Q18.
Ano: 1994
URL: http://purl.umn.edu/54703

Valuation of Linkages between Climate Change, Biodiversity and Productivity of European Agro-Ecosystems
Provedor de dados: 31
Autores: Palatnik,   Ruslana Rachel; Nunes,   Paulo A.L.D.
It is clear that climate change involves changes in temperature and precipitation and therefore directly affects land productivity. However, this is not the only channel for climatic change to affect agro-systems. Biodiversity is subject to climatic fluctuations and in turn may alter land productivity too. Firstly, biodiversity is an input into agro-ecosystems. Secondly, biodiversity supports the functioning of these systems (e.g. the balancing of the nutrient cycle). Thirdly, agro-systems also host important wildlife species which, though not always, play a functional role in land productivity, nonetheless constitute important sources of landscape amenities. The present paper illustrates a unique attempt to economically assess this additional effect...
Tipo: Working or Discussion Paper
Palavras-chave: Climate Change; Biodiversity; Agro-Ecosystems; Agribusiness; D58; Q54; Q57.
Ano: 2010
URL: http://purl.umn.edu/98096

Efficient Refuge policies for Bt cotton in India
Provedor de dados: 31
Autores: Singla,   Rohit; Johnson,   Phillip N.; Misra,   Sukant K.
This study examined the efficient refuge policies for Bt cotton for three cotton growing regions in India. This was accomplished by developing a single-pest, dual-toxin biological model simulating bollworm resistance to the Bt toxin and synthetic pyrethroids, followed by formulating profit functions for Bt and non-Bt cotton for a representative producer in each region. Profits received in subsequent periods were considered in the regulatory model in order to choose a refuge constraint (static problem) or a sequence of refuge policies (dynamic problem) for each region that maximize discounted profits received over 15 years, subject to various economic and biological constraints. Dynamic solutions for the regulatory problem were derived for each region using...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Security and Poverty.
Ano: 2010
URL: http://purl.umn.edu/61751

Environmental Regulation and the Export Dynamics of Energy Technologies
Provedor de dados: 31
Autores: Costantini,   Valeria; Crespi,   Francesco.
The pollution haven hypothesis affirms that an open market regime will encourage the flow of low technology polluting industries toward developing countries, due to potential comparative advantages related to low environmental standards. In contrast, the hypothesis suggested by Porter and van der Linde claims for a competitive dynamic behaviour by innovating firms, allowing a global diffusion of environmental-friendly technologies. Environmental regulation may represent a relevant mechanism through which technological change is induced. In this way countries subject to more stringent environmental regulations may become net exporters of environmental technologies. This paper provides new evidence on the evolution of export flows of environmental...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Regulation; Trade and Environment; Energy Technologies; Environmental Economics and Policy; F18; F21; Q43; Q55; Q56.
Ano: 2007
URL: http://purl.umn.edu/9550

Relative Impact of the Norway-EU Salmon Agreement: A Midterm Assessment
Provedor de dados: 31
Autores: Kinnucan,   Henry W.; Myrland,   Oystein.
An agreement between Norway and the European Commission specifies an increase in the export tax on Norwegian salmon entering EU markets from 0.75% to 3.00% effective 1 July 1997. Further, Norway's exports are subject to a price floor and quantity ceiling, neither of which were binding over the evaluation period. Since the tax's proceeds are to be used by Norway to fund generic marketing of Atlantic salmon, it is possible that the agreement is winwin, i.e., benefits United Kingdom and Norwegian producers alike. To test this, we use an equilibrium displacement model to estimate the agreement's effects on prices, trade flows, and producer welfare. Results based on data through 1999 suggest the agreement is indeed win-win, but that currency realignments and...
Tipo: Conference Paper or Presentation
Palavras-chave: Equilibrium displacement modeling; Export tax; Generic advertising; Trade policy; International Relations/Trade.
Ano: 2002
URL: http://purl.umn.edu/24826

CONTRIBUTIONS OF AGRICULTURAL IMPROVED TECHNOLOGIES TO RURAL POVERTY ALLEVIATION IN DEVELOPING COUNTRIES: CASE OF IMAZAPYR-RESISTANT MAIZE IN WESTERN KENYA
Provedor de dados: 31
Autores: Mignouna,   D.B.; Mutabazi,   K.D.S.; Senkondo,   E.M.; Manyong,   Victor M.
Last two decades have been dominated by issues on poverty as major growth area with the adoption by United Nations member countries of the Millennium Development Goals, the first of which calls for halving the incidence of poverty and hunger by 2015, this has underlined the importance of introduction of improved agricultural technologies. Most poor rural households in developing countries usually depend on agriculture and have to cope with poverty stills a rural phenomenon. Agricultural production has continuously decreased, subject to serious limitations such as declining soil fertility, diseases, pests, drought and erosion plaguing crops growing areas. This situation should have encouraged rural households to increasingly consider the use of promising...
Tipo: Conference Paper or Presentation
Palavras-chave: IRM technology; Striga control; Poverty reduction; Kenya.; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011
URL: http://purl.umn.edu/100685

ANÁLISE COMPARATIVA DA VIABILIDADE ECONÔMICA DOS SISTEMAS DE PRODUÇÃO CONVENCIONAL E INTEGRADO DE CAFÉ
Provedor de dados: 31
Autores: Pereira,   Vanessa da Fonseca; Mendonca,   Talles Girardi de; Reis,   Bricio dos Santos.
Due to growing consumer demands regarding product quality and the social and environmental aspects of the production process, there is a need to redefine the agricultural productive structure so as to make it sustainable. The Integrated Production System in Coffee (CIP) aims to meet these new requirement standards. The system, however, is still very recent and requires more detailed studies to identify its strengths and weaknesses. Therefore, the objective of this work is to carry out a comparative analysis of the economic viability and the risk associated to the conventional and integrated systems of coffee production in the farm property of São João, in the Coimbra district in Minas Gerais state. The method used was the calculation of the viability and...
Tipo: Journal Article
Palavras-chave: Coffee; Integrated production; Viability; Risk; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2008
URL: http://purl.umn.edu/61726

The Golden Rule in Transfer Pricing Regulation
Provedor de dados: 31
Autores: Pauwels,   Wilfried; Weverbergh,   Marcel.
In this paper we analyze the optimal regulation of an internationally integrated monopolist, producing in one country and selling in another country. The monopolist’s pricing policy is constrained by transfer pricing regulations, and is subject to different tax rates on profits in the two countries. The governments of the two countries can use their tax rates as regulatory instruments, and they also determine an arm’s length interval of acceptable transfer prices. The two governments can cooperate in order to maximize world welfare, or they can each try to maximize their own country welfare. It is shown that in several of the solutions governments apply a golden rule. This rule requires that the firm realizes all profits in the manufacturing country, while...
Tipo: Working or Discussion Paper
Palavras-chave: Transfer pricing; Welfare analysis; Political Economy; F13; K2; C72.
Ano: 2005
URL: http://purl.umn.edu/24170

EVALUATING EXTENSIVE SHEEP FARMING SYSTEMS
Provedor de dados: 31
Autores: Stott,   Alistair W.; Vosough Ahmadi,   Bouda; Morgan-Davies,   Claire; Dwyer,   Cathy M.; Goddard,   Pete; Phillips,   Kate; Milne,   Catherine E.; Kupiec-Teahan,   Beata; Ringrose,   Sian; Waterhouse,   Tony.
Data from each of 5 commercial, extensive sheep farms in Cumbria, UK were used as parameters in a linear program (LP) representing labour and grazing management in such farming systems. The LP maximised ewe enterprise gross margin subject to constraints dictated by the labour availability and land types on each farm. Under the assumptions used, labour availability and price restricted ewe numbers well below those observed in practice on 2 farms i.e. land resources were adequate for the farming system practiced. On two other farms stocking levels and hence returns were limited by the availability of forage and hence feed input prices relative to output. On one farm, greater grassland productivity was the key determinant of system performance. It was...
Tipo: Working or Discussion Paper
Palavras-chave: Livestock Production/Industries; Extensive; Sheep; Economics; LP.
Ano: 2009
URL: http://purl.umn.edu/61123

Development in the Midst of Drought: Evaluating an Agricultural Extension and Credit Program in Nicaragua.
Provedor de dados: 31
Autores: Mullally,   Conner.
This essay is an evaluation of year one of the Rural Business Development (RBD) program for small rice farmers in León, Nicaragua. The RBD program is administered by the Millennium Challenge Corporation, and is designed to deliver agricultural extension advice and affordable credit in the form of inputs to farm households. This essay estimates the average impact of the program on rice yields and revenues utilizing inverse propensity score weighting combined with linear regression. In conducting statistical inference, it also accounts for the fact that agricultural outcomes are likely correlated over space in a small area such as the one studied here. The results suggest that the program had no impact on average, likely due to the presence of a severe...
Tipo: Conference Paper or Presentation
Palavras-chave: Development; Extension; Credit; Spatial; Impact evaluation; International Development.
Ano: 2011
URL: http://purl.umn.edu/108723

DOING POLICY IN THE LAB! OPTIONS FOR THE FUTURE USE OF MODEL-BASED POLICY ANALYSIS FOR COMPLEX DECISION-MAKING
Provedor de dados: 31
Autores: Happe,   Kathrin; Balmann,   Alfons.
For models to have an impact on policy-making, they need to be used. Exploring the relationships between policy models, model uptake and policy dynamics is the core of this article. What particular role can policy models play in the analysis and design of policies? Which factors facilitate (inhibit) the uptake of models by policy-makers? What are possible pathways to further develop modelling approaches to better meet the challenges facing agriculture today? In this paper, we address these issues from three different points of view, each of which should shed some light on the subject. The first point of view discusses models in the framework of complex adaptive systems and uncertainty. The second point of view looks at the dynamic interplay between...
Tipo: Conference Paper or Presentation
Palavras-chave: Modelling; Complexity; Participatory modelling; Policy analysis; Model use; Agricultural and Food Policy; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/6588

Food production, distribution and culture: public views, interests and concerns
Provedor de dados: 31
Autores: Kupiec-Teahan,   Beata; Leat,   Philip M.K.; Revoredo-Giha,   Cesar.
A basic right of both a consumer and a citizen is the right to be heard, and their voiced concerns have to be taken into account when developing policies and obtaining trust for government actions. Therefore this study focuses on consumers’ interests, opinions and expectations which are identified and categorised according to subject area, degree of involvement and political agenda of a consumer. The paper draws on the responses of individual members of the public in the National Food Policy discussion initiated by the Scottish Government in 2008. Altogether 246 responses were subjected to quantitative analysis of texts, supported by text mining. A variety of interests and opinions underpinning the political agendas of individuals responding to the...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Policy; Scotland; Text analysis. Consumer research; Consumer/Household Economics.
Ano: 2009
URL: http://purl.umn.edu/51061

The Food Stamp Scheme in Sri Lanka: Costs, Benefits, and Options for Modification
Provedor de dados: 31
Autores: Edirisinghe,   Neville.
Many developing countries attempt to assist low-income households to improve their nutritional intake by providing direct or indirect income transfers. The latter are more common and usually take the form of price subsidies on a range of staple foods. Direct transfers, such as issues of food coupons, are not as widely used as price subsidies. In this regard, the case of Sir Lanka is somewhat unusual, for over four decades it followed a policy of subsidizing food prices, and during the late 1970s, this policy was replaced by a direct transfer scheme in the form of food stamp program.  An analysis of the former food subsidy scheme of Sri Lanka was the subject matter of IFPRI Research Report 13, The Impact of Public Foodgrain Distribution on food Consumption...
Tipo: Report
Palavras-chave: Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Sri Lanka; Food Relief; Economic aspects; Government policies.
Ano: 1987
URL: http://purl.umn.edu/42173

Exploring the cost effectiveness of land conservation auctions and payment policies
Provedor de dados: 31
Autores: Connor,   Jeffery D.; Ward,   John R.; Bryan,   Brett.
This article evaluates the cost-effectiveness of the Catchment Care Australian conservation auction. It provides evidence of auction cost effectiveness, and estimates cost savings from two discrete components: (i) the opportunity cost revelation incentive provided by the auction mechanism, and (ii) the improved environmental targeting capacity that results from development of a scientifically based environmental benefits assessment capacity. Results show that there are potentially very large returns associated with the latter component that have been overlooked in the literature. Additionally, transaction costs involved with administering the case study conservation auction and the prior non-auction payment policy are compared. We find that the...
Tipo: Article
Palavras-chave: Auctions; Biodiversity; Cost effectiveness; Environmental economics; Environmental policy; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/118545

Beyond Copenhagen: A Realistic Climate Policy in a Fragmented World
Provedor de dados: 31
Autores: Carraro,   Carlo; Massetti,   Emanuele.
We propose a realistic approach to climate policy based on the Copenhagen Agreement to reduce Greenhouse Gases (GHGs) emissions. We assess by how much the non-binding, although official, commitments to reduce emissions made in Copenhagen will affect the level of world GHGs emissions in 2020. Our estimates are based on official communications to the UNFCCC, on historic data and on the Business-as-Usual scenario of the WITCH model. We are not interested in estimating the gap between the expected level of emissions and what would be needed to achieve the 2°C target. Nor do we attempt to calculate the 2100 temperature level implied by the Copenhagen pledges. We believe these two exercises are subject to high uncertainty and would not improve the current state...
Tipo: Working or Discussion Paper
Palavras-chave: Kyoto Protocol; International Climate Agreements; Climate Policy; Clean  Development Mechanism; Environmental Economics and Policy; F5; Q01; Q54; Q58.
Ano: 2010
URL: http://purl.umn.edu/98094

ANNUAL REPORT ON COTTON ECONOMICS RESEARCH 2000/2001
Provedor de dados: 31
This report summarizes the activities and accomplishments in Cotton Economics Research, which is conducted within the Cotton Economics Research Institute at Texas Tech University, during the 2000-2001 year.  Of the $132,415 internal funding for the last year, $104,437 (79%) was allocated for student assistantships and faculty salaries, and $27,978 (21%) for maintenance and operation (supplies, travel, equipment, etc.). A total of 5 research projects were funded with the Applied Economics Research Funds for last year.  Another 19 externally-funded projects were managed during the same time period.  Each of the projects, both internally and externally funded, is summarized in the attached progress reports (Appendix B).  These research activities covered...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/31252

Food Labeling Use and Differentiated Consumers Behavior: A Survey Analysis in Spanish Food Market
Provedor de dados: 31
Autores: Gonzalez-Roa,   Maria del Carmen; Calatrava-Requena,   Javier.
Research on consumer’s use of food labels have been heavily increasing in the last 20 years from some pioneering works in the eighties. Different analytical approaches to the subject may be identified in the scientific literature, among them, the analysis of the use of different types of information often labeled in food markets, and its relationship with some consumer characteristics. The paper fall into the scope of this type of approach. From a survey to 1500 Spanish consumers, stratified by regions (zone) and type of habitat (rural, urban and metropolitan), a composite index, made by aggregating reading frequencies of nine different types of information (calories, ingredients, expiry date, nutritional composition, etc.) has been calculated, and both an...
Tipo: Conference Paper or Presentation
Palavras-chave: Food labels; Aggregate use index; Consumer behavior; Consumer/Household Economics.
Ano: 2008
URL: http://purl.umn.edu/43541

Input Subsidy Programs and Commercial Market Development: Modeling Fertilizer Use Decisions in a Two-Channel Marketing System
Provedor de dados: 31
Autores: Xu,   Zhiying; Jayne,   Thomas S.; Govereh,   Jones.
Replaced with revised version of paper 07/18/06.
Tipo: Conference Paper or Presentation
Palavras-chave: Crowding out effect; Input marketing channels; Fertilizer; Sub-Saharan Africa; Survey data; Marketing.
Ano: 2006
URL: http://purl.umn.edu/21270

Cost-Benefit Analysis of the protection of Malleefowl in the Lachlan Catchment
Provedor de dados: 31
Autores: Greyling,   Tertius; Bennett,   Jeffrey W.
A cost-benefit analysis (CBA) of an investment in the protection of malleefowl and associated native vegetation in the Lachlan Catchment’s central-west yielded a benefit-cost ratio of 1.4. The CBA is based on project expenditures over the past four years coupled with benefit estimates from a recent Choice Modelling study in the Lachlan Catchment. The project targets the protection of malleefowl on private land which has not yet been surveyed but where the species is known to be present. The CBA is subject to significant uncertainty due to a lack of available data. Nonetheless, sensitivity analysis indicates that the BCR is consistently larger than unity, if marginal in some cases. This suggests that the project is a worthwhile investment at this early...
Tipo: Report
Palavras-chave: Cost-benefit analysis; Benefit-cost ratio; Choice modelling; Malleefowl; Lachlan Catchment; Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/107849

Gendered Impact of Irrigated Rice Schemes’ Governance on Farmers’ Income, Productivity and Technical Efficiency in Benin
Provedor de dados: 31
Autores: Kinkingninhoun-Medagbe,   Florent M.; Diagne,   Aliou; Agboh-Noameshie,   Afiavi R.; Adegbola,   Patrice Ygue.
Collective actions groups have many advantages and are sometimes essential, yet they can reinforce or perpetuate inter-and intra-gender inequalities when their functioning is left entirely subject to internal community dynamics and they are not well managed. This is well illustrated by the case of Koussin-Lélé rice scheme in the central Benin. This paper apply inequality indices and frontier production function to data from a sample of male and women rice farmers to analyze the gender inequalities in access to land and the governance of the groups, and their gender-differentiated impacts on farmers' productivity, technical efficiency and income. The results show that women are particularly discriminated against with regards to access to land, with...
Tipo: Conference Paper or Presentation
Palavras-chave: Gender; Land distribution; Rice; Technical efficiency; Productivity; Income; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52156

Land Salinisation, Waterlogging and the Agricultural Benefits of a Surface Drainage Scheme in Benerembah Irrigation District
Provedor de dados: 31
Autores: Jones,   Randall E.; Marshall,   Graham R.
Soil salinisation and waterlogging are significant problems in the Irrigation Areas and Districts of southern New South Wales. Various actions can be taken at either a regional or farm level to alleviate these problems. District surface drainage, sub-surface drainage, pumping from deep aquifers and changes to water pricing policies are regional options, while possible on-farm options include laser controlled landforming, pumping groundwater from shallow aquifers, recycling drainage water, changes to crops and rotations and the adoption of improved irrigation systems. The purpose of this study was to analyse the agricultural benefits of a surface drainage scheme proposed for an Irrigation District in the Murrumbidgee Valley. The objective of the analysis...
Tipo: Journal Article
Palavras-chave: Land Economics/Use.
Ano: 1992
URL: http://purl.umn.edu/7423

Increasing the Openness of the Trade Policy Process: Challenges and Implications
Provedor de dados: 31
Autores: Isaac,   Grant E.
Trade policy – once a subset of foreign policy far removed from domestic concern, focused squarely on border issues and subject to the rules of international diplomacy – is now a central concern on the public policy agenda as trade issues have become increasingly entwined with traditionally domestic policy issues. Consequently, demands have been made for more openness in trade policy formation and, in response, many governments have undertaken openness initiatives. Despite these developments there has been only a little research into the increased openness of trade policy processes in general and no research aimed at developing a consistent framework for categorizing various openness initiatives and permitting a meaningful comparison of initiatives between...
Tipo: Journal Article
Palavras-chave: Openness; Openness framework; Trade policy; Transparency; International Relations/Trade.
Ano: 2003
URL: http://purl.umn.edu/23816

Consumer acceptance of genetically modified rapeseed-oil: A discrete-choice-experiment
Provedor de dados: 31
Autores: Klein,   Agnes; Zapilko,   Marina; Menrad,   Klaus; Gabriel,   Andreas.
This paper deals with consumer acceptance of genetically modified rapeseed-oil in Germany and analyzes under which conditions consumers would buy such products. To investigate this subject a Discrete-Choice-Experiment was performed within the framework of a cross-European consumer survey in spring 2007. The results show that consumers’ utility is increased by an organically produced product and decreased by a GM product. Thereby the association with individual advantages (health benefits) decreases consumers’ utility less compared to the association with environmental benefits. Additionally, it could be shown that German consumers prefer locally produced rapeseed-oil compared to imported. If GM products exhibit a considerable price discount compared to...
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer behavior; GM food; Rapeseed-oil; Discrete-Choice-Experiment; Food Consumption/Nutrition/Food Safety.
Ano: 2009
URL: http://purl.umn.edu/53264

SHEEP PRODUCTION IN HUNGARY – IS IT A SUSTAINABLE SECTOR?
Provedor de dados: 31
Autores: Madai,   Hajnalka; Nabradi,   Andras; Lapis,   Miklos.
The question of sustainability of agricultural production especially animal production and events leading to its development can be dated back to the second part of the last century. Sustainability is a priority subject matter as it is a core element in our existence and in the survival of the forthcoming generations. The notion of sustainability comprises three aspects: ecological, social and political and economic target systems, which by now have been supplemented with cultural and regional elements including the protection of environment, local traditions, scale of values, cultural and historical heritage. The principles of sustainable development also include the improvement of human and animal health and the maintenance of vital rural communities....
Tipo: Journal Article
Palavras-chave: Sheep production; Sustainability; Problem tree; Swot; Agricultural and Food Policy; Community/Rural/Urban Development; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/53576

RIMPhil: a bioeconomic model for integrated weed management of annual barnyardgrass (Echinochloa crus-galli) in Philippine rice farming systems
Provedor de dados: 31
Autores: Beltran,   Jesusa C.; Pannell,   David J.; Doole,   Graeme J.; White,   Benedict.
This paper describes a complex, dynamic simulation model that has been developed for the analysis of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli) in rice farming systems in the Philippines. Users of the model may simulate any feasible combination of 49 weed treatments options across wet and dry cropping seasons over 5, 10, 15, and 20 year periods, subject to a predetermined sequence of planting methods. The main outputs of the model include weed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Model output emphasises the substantial economic benefits associated with effective long-term weed management strategies. In addition, the most-profitable weed...
Tipo: Working or Discussion Paper
Palavras-chave: Barnyardgrass; Bioeconomic model; Integrated weed management; Rice farming systems.; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/104637

COMÉRCIO JUSTO INTERNACIONAL: O CASO DO SUCO DE LARANJA ENTRE O BRASIL E A FRANÇA
Provedor de dados: 31
Autores: Machado,   Melise Dantas; Paulillo,   Luiz Fernando; Lambert,   Annie.
This paper is a preliminary analysis of the governance structure of the faire trade of orange juice between Brazil and France. Fair trade is an organizational field composed of complex organizational networks that maintain relations of mutual dependence and share the same values system. As fair trade is a subject that has received relatively little study and presents many particularities, an exploratory study was considered appropriate. Primary and secondary data were collected. In the case of the trade of orange juice between Brazil and France, two commercial networks were identified. The integrated network is constituted by professionals who specialize in fair trade, while the certified network includes more conventional commercial organizations, such as...
Tipo: Journal Article
Palavras-chave: Transaction costs; Governance structures; Networks; Fair trade; Orange juice.; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2008
URL: http://purl.umn.edu/61719

Network Constrained Wind Integration: An Optimal Cost Approach
Provedor de dados: 31
Autores: Maddaloni,   Jesse D.; Rowe,   Andrew M.; van Kooten,   G. Cornelis.
Planning electricity supply is important because power demand continues to increase while there is a concomitant desire to increase reliance on renewable sources. Extant research pays particular attention to highly variable, low-carbon energy sources such as wind and small-scale hydroelectric power. Models generally employ only a simple load levelling technique, ensuring that generation meets demand in every period. The current research considers the power transmission system as well as load levelling. A network model is developed to simulate the integration of highly variable non-dispatchable power into an electrical grid that relies on traditional generation sources, while remaining within the network’s operating constraints. The model minimizes a...
Tipo: Working or Discussion Paper
Palavras-chave: Electric networks; Optimal power flow; Wind power; Intermittent sources; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q40; Q42.
Ano: 2006
URL: http://purl.umn.edu/37034

INCENTIVE CONTRACTS TO MEET FUNCTIONAL CHARACTERISTICS IN WHEAT PURCHASING -- SUMMARY
Provedor de dados: 31
Autores: Wilson,   William W.; Maxwell,   Brett J.; Dahl,   Bruce L.
Consistency of functional characteristics in hard red spring (HRS) wheat is a concern confronting sellers and buyers.  This research analyzes contract incentives for importers with respect to cost and potential risk of acceptance.  A principal-agent framework is utilized to examine contract incentives.  In the principal-agent contract, the principal offers the contract, the agent rejects or accepts the contract, and then decides how much effort to apply.  All this is subject to risk for the agent and moral hazard for the principal.  An example is presented, for which equilibrium contract terms are a base price of 454 cents per bushel for low quality wheat and a premium of 36 cents per bushel if high quality is achieved.  The premium for high quality is...
Tipo: Working or Discussion Paper
Palavras-chave: Incentive Contact; Functional Characteristic; Wheat; Principal-Agent; Crop Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/23559

Effects of Market Power on the Size and Distribution of Subsidy Benefits: The Case of Ethanol Promotion
Provedor de dados: 31
Autores: Saitone,   Tina L.; Sexton,   Richard J.; Sexton,   Steven E.
The subject of market power is discussed frequently in debates about subsidies for ethanol production, and structural conditions in the industry create a prima-facie case for concerns about market power. This paper develops a prototype model for determining the production and price impacts and distribution of benefits from the U.S. ethanol subsidy when upstream sellers in the seed sector and downstream buyers in the processing sector may exercise market power.  The impact of the subsidy is analyzed within a simulation framework for alternative levels of market power. Results demonstrate that the impacts on prices and output are limited for modest departures from competition.  Distributional impacts are much greater. Seed producers and corn processors with...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/9810

Comparing Sustainable Value Approach, Data Envelopment Analysis and indicator approaches - An application on German dairy farms
Provedor de dados: 31
Autores: Ehrmann,   Markus.
Objective of this paper is to compare different measurement concepts for sustainability at farm level in Germany: a) Sustainable Value Approach (SV), b) Data Envelopment Analysis (DEA) and c) indicator approaches close to KUL (Criteria for an Ecologically Compatible Land Management). The mathematical programming model FARMIS is extended wrt the underlying subject and applied for quantitative analysis. Indicators based on physical inputs are calculated based on monetary data of national FADN data. The methods are applied to a sample of about 4000 representative dairy farms. Results of SV are given in both absolute values and return-to-cost ratios which take farm size into account. Considering relationships between methods we found out that correlation...
Tipo: Conference Paper or Presentation
Palavras-chave: Sustainable Value Approach; Agriculture sustainability; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44140

WOOL MARKETING: SOME THOUGHTS FROM THE MARKET PLACE
Provedor de dados: 31
Autores: McMillan,   R.B.
This paper will not discuss wool's competitive situation, its general outlook, or the nature and significance of its price fluctuations. These are nowadays receiving good attention elsewhere. My main object here is to restate some of the basic facts about the wool market, which must always be borne in mind in any discussion of wool marketing. And the method will be to describe existing marketing systems briefly, and then to examine some of the circumstances which place limitations on the choice of alternative systems available. However, there will be no attempt to make any such choice; only to provide some light for any discussion on the problem.  One reason for this approach is that I believe that, with this, the most complex and specialized of our major...
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries; Marketing.
Ano: 1960
URL: http://purl.umn.edu/22417

PROTECTED HORTICULTURE AND ENVIRONMENT. AN INTEGRAL DECISION MODEL FOR GREENHOUSE WASTE MANAGEMENT IN SOUTHEASTERN SPAIN
Provedor de dados: 31
Autores: Gomez,   Salvador Parra.
Over 380000 tons of vegetable waste is produced annually in the “Campo de Dalías” zone (Almería, Spain), deriving from the diverse existing crops grown under plastic cover. Landfills containing this vegetable waste are a potential breeding ground for diseases and pests, they can also be the subject of uncontrolled burning, cause a riverbed blockage and, at the same time, they are an unsightly aspect of the landscape. The only way to prevent or minimize this problem is to adopt a comprehensive and environmentally sensitive waste management program. The utilization of the Contingent Valuation Method (CVM) has allowed the monetarization of the total environmental benefit of the projects undertaken, composting plant or in an energy recycling process, to the...
Tipo: Conference Paper or Presentation
Palavras-chave: Contingent Valuation Method; GIS; Cost-Benefit Analysis.; Demand and Price Analysis; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6399

Do Price Uncertainties Affect the Use of Policy Flexibilities? The Selection of Sensitive Products in WTO Agricultural Negotiations
Provedor de dados: 31
Autores: Listorti,   Giulia; Kempen,   Markus; Girardin,   Jean; Kranzlein,   Tim.
In a context in which price uncertainty is likely to increase, expected market trends need to be taken carefully into account while negotiating international trade policy rules. This paper aims at analyzing what is their influence on the use of policy flexibilities in the context of WTO agricultural negotiations. In particular, within the market access pillar, we focus on the selection of sensitive products. Our model, TRIMAG (Tariff Reduction Impact Model for Agriculture), defined at the 8-digit level, optimizes the domestic agricultural value added subject to a maximum number of sensitive tariff lines, accounting for various future international price scenarios. Furthermore, we test the use of alternative options for the implementation of “tariff...
Tipo: Conference Paper or Presentation
Palavras-chave: WTO agricultural negotiations; Market access; Sensitive products; International Relations/Trade; F13; Q17.
Ano: 2011
URL: http://purl.umn.edu/114381

THE EFFECTS OF SPOT WATER MARKETS ON THE ECONOMIC RISK DERIVED FROM VARIABLE WATER SUPPLY
Provedor de dados: 31
Autores: Calatrava-Requena,   Javier; Garrido,   Alberto.
Water availability in semiarid regions commonly exhibits patterns of extreme variability. Even in basins with large infrastructure development, some users are subject to low levels of water reliability, incurring economic losses during periods of scarcity. More flexible instruments, such as voluntary exchanges of water among users, may help users reduce their risk exposure. Recent changes in the Spanish water Law have given an initial impulse to allow for lease-out contracts of water use rights. This paper analyses, from theoretical and empirical standpoints, the effect that establishing water markets has on the economic risk caused by water availability variations. The empirical study is performed on an irrigation district of the Guadalquivir Valley...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/25885

Impacts of Alternative Marketing Agreement Cattle Procurement Volumes on Packer Costs: Evidence from Plant-Level P&amp;L Data
Provedor de dados: 31
Autores: Koontz,   Stephen R.; Muth,   Mary K.; Lawrence,   John D.
It has been argued that access to captive supply cattle improve the economic efficiency of beef packing facilities. However, this argument has not been subject to hypothesis testing. This work models the cost efficiencies associated with captive supplies or cattle we refer to as being sourced through alternative marketing agreements (AMAs). We find that slaughter and processing costs are lower ceteris paribus for AMA cattle than for cash market cattle. We find that plants that slaughter cattle from AMA sources operate at higher monthly volumes ceteris paribus and lower average costs per head. And we find that plants that slaughter cattle from AMA sources have more predictable volumes ceteris paribus and have lower average costs per head. If AMAs were...
Tipo: Conference Paper or Presentation
Ano: 2007
URL: http://purl.umn.edu/37559

Estimation of Consumer Demand Functions When the Observed Prices Are the Same for All Sample Units
Provedor de dados: 31
Autores: Paris,   Quirino.
With the advent of the almost ideal demand system (AIDS) of Deaton and Muellbauer, the estimation of consumer demand functions revolves around specifications that use flexible functional forms of the indirect utility function. This dual approach has put on the backburner the traditional primal approach because the direct utility function exists only in a latent state. The lack of explicit, analytical invertibility of either system, however, is an indication that focusing exclusively on the dual side of the consumer problem is equivalent to disregard potentially important and independent information residing with the primal side. This paper suggests that efficient estimates (in the sense of using all the available information) of the demand functions...
Tipo: Working or Discussion Paper
Palavras-chave: Consumer demand functions; Primal; Dual; Nonlinear errors-in-variables; Demand and Price Analysis; Research Methods/ Statistical Methods; D0.
Ano: 2003
URL: http://purl.umn.edu/93739

The Optimal Pricing of Pollution When Enforcement is Costly
Provedor de dados: 31
Autores: Stranlund,   John K.; Chavez,   Carlos A.; Villena,   Mauricio G.
We consider the pricing of a uniformly mixed pollutant when enforcement is costly with a model of optimal, possibly firm-specific, emissions taxes and their enforcement. We argue that optimality requires an enforcement strategy that induces full compliance by every firm. This holds whether or not regulators have complete information about firms’ abatement costs, the costs of monitoring them for compliance, or the costs of collecting penalties from noncompliant firms. Moreover, ignoring several unrealistic special cases, optimality requires discriminatory emissions taxes except when regulators are unable to observe firms’ abatement costs, the costs of monitoring individual firms, or any firm-specific characteristic that is known to be jointly distributed...
Tipo: Working or Discussion Paper
Palavras-chave: Compliance; Enforcement; Emissions Taxes; Monitoring; Asymmetric Information; Uncertainty; Environmental Economics and Policy; L51; Q58.
Ano: 2007
URL: http://purl.umn.edu/7387

Modulation of Direct Payments: A crossed analysis of incremental schemes
Provedor de dados: 31
Autores: Boulanger,   Pierre.
The progressive attempt and implementation of direct payment limitations since the 1992 CAP reform has developed a “modulation mechanism” aiming to transfer funds from market support and direct payment schemes (CAP first pillar) towards rural development measures (CAP second pillar). Under the 2007-2013 European financial perspectives, the annual 5% rate of modulation is expected to increase. The paper focuses on the financial impacts of four scenarios together with corresponding political and institutional feasibilities. The paper imposes on itself three sound constraints: (i) expanding modulation should not jeopardise the future in-depth reform of the direct payment regime, (ii) modulation should be compulsory and consistent with rural development...
Tipo: Conference Paper or Presentation
Palavras-chave: Direct payments; Rural development; European budget; Agricultural Finance.
Ano: 2008
URL: http://purl.umn.edu/44023

A Multidimensional Homo Economicus: Cultural Dimensions of Economic Preferences in Four Countries
Provedor de dados: 31
Autores: Ehmke,   Mariah D.; Lusk,   Jayson L.; Tyner,   Wallace E.
Previous work in experimental economics reveals specific differences in economic behavior, especially reciprocity and free-riding behavior, across cultures.  We expand the possible pallet of cross-cultural behavioral differences that may exist. We hypothesize that different kinds of strategic interaction and individual decision-making behaviors differ across locations. The variety of experiments we use allow us to report multidimensional rather than just single dimensional differences in behavior across locations. In order to build a broad Homo Economicus we conducted economic experiments in four dissimilar locations: Hangzhou, China; Niamey, Niger; Grenoble, France; Manhattan, Kansas; and West Lafayette, Indiana.  Each subject completed an ultimatum...
Tipo: Conference Paper or Presentation
Palavras-chave: Time preference; Risk preference; Voluntary contribution mechanism; Ultimatum bargaining game; Cultural; China; France; Niger; Kansas; Indiana; US; Institutional and Behavioral Economics.
Ano: 2005
URL: http://purl.umn.edu/19225

Demonstration and Radiation Extension Mode of Agricultural Technology  - A Case of Science and Technology Project of High Yield in Hebei Province
Provedor de dados: 31
Autores: Wang,   Xiao-ying; Shi,   Zheng; Yang,   Ying-guang; Zhao,   Hui-feng.
Firstly, relying on the science and technology project of high yield in Hebei Province, connotation of agricultural technology demonstration and extension modes and the grain yield project in Hebei Province is introduced. Extension mode of agricultural technology demonstration and radiation is constructed. Agricultural technology demonstration and radiation mode includes the radiation center, primary irradiation and secondary irradiation. Secondly, management system and operational mechanism of agricultural technology demonstration and radiation mode are discussed, mainly expressed in establishing leading group of demonstration counties (cities), implementing responsibility system of department leaders, setting up expert advisory instruction group, subject...
Tipo: Journal Article
Palavras-chave: Science and technology project of high yield; Demonstration and radiation; Agricultural extension mode; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/93543

The Impact of Media Coverage on Proposed Strategies for Preventing Future Food Scandals
Provedor de dados: 31
Autores: Bohm,   Justus; Schulze,   Holger; Kleinschmit,   Daniela; Spiller,   Achim; Nowak,   Beate.
At the beginning of the year 2005 the German meat industry frequently featured in the media with reports on tainted meat. Since then, a huge number of new problems concerning meat production and trade have arisen which have uncovered weaknesses in food quality control, and highlighted the explosive nature of this subject matter. It is unclear what effect the media involvement has had on the political process of regulatory decision-making in the food industry, and to what extent it has influenced this process. The following article examines these issues with regard to the presentation of food safety scandals in the media, as the role of press coverage will continue to increase in importance in the coming years. This research is based on the content analysis...
Tipo: Conference Paper or Presentation
Palavras-chave: Media Analysis; Political Decision Making; Media Effects; Tainted Meat; Content Analysis; Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Political Economy; Productivity Analysis; Risk and Uncertainty.
Ano: 2009
URL: http://purl.umn.edu/59190

Identifying agricultural research and development investment opportunities in sub-Saharan Africa: A global, economy-wide analysis
Provedor de dados: 31
Autores: Ehui,   Simeon K.; Tsigas,   Marinos E.
Poverty is higher in most African countries than elsewhere in the developing world, and highest in the rural areas. Accelerating growth in agriculture will therefore be critical to sustain growth and reduce poverty, but policy makers are unsure which sub-sector will yield the highest return for a given budget. This paper uses an applied general equilibrium model to simulate productivity gains in sub-Saharan agriculture subject to trade-offs between gains in crops and gains in livestock. The simulated results suggest three conclusions. First, most sub-Saharan economies gain more from research and development (R&amp;D) investment in crops than in livestock, though the SACU (South African Customs Union) economies and Madagascar benefit from sharing it between...
Tipo: Journal Article
Palavras-chave: Agriculture; Livestock research; Development; Investment; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/57018

Nominal and Real Exchange Rate Change by China:  Global Impacts on Agricultural Prices
Provedor de dados: 31
Autores: MacDonald,   Stephen; Seeley,   Ralph.
Replaced with revised version of paper 06/15/07.
Tipo: Conference Paper or Presentation
Palavras-chave: Demand and Price Analysis; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/9692

Impacts of labour on interactions between economics and animal welfare in extensive sheep farms
Provedor de dados: 31
Autores: Vosough Ahmadi,   Bouda; Dwyer,   Cathy M.; Erhard,   H.W.; Morgan-Davies,   Claire; Waterhouse,   A.; Milne,   Catherine E.; Kupiec-Teahan,   Beata; Ringrose,   Sian; Goddard,   Pete; Phillips,   Kate; Stott,   Alistair W.
This study quantified interactions between animal welfare and farm profitability in British extensive sheep farming systems. Qualitative welfare assessment methodology was used to assess welfare from the animal's perspective in 20 commercial extensive sheep farms and to estimate labour demand for welfare, based on the assessed welfare scores using data collected from farm inventories. The estimated labour demand was then used as a coefficient in a linear program based model to establish the gross margin maximising farm management strategy for given farm situations, subject to constraints that reflected current resource limitations including labour supply. Regression analysis showed a significant relationship between the qualitative welfare assessment...
Tipo: Conference Paper or Presentation
Palavras-chave: Sheep; Labour; Animal Welfare; Linear Programme; Livestock Production/Industries; C6; Q10; Q19; Q57.
Ano: 2010
URL: http://purl.umn.edu/91803

LONG-TERM FORECASTING OF INTERNATIONAL FOREST PRODUCT MARKETS: THE GFPM MODEL AND IMPLICATIONS FOR EUROPE
Provedor de dados: 31
Autores: Buongiorno,   Joseph; Zhang,   Dali; Rytkonen,   Antti; Zhang,   Yibing; Zhu,   Shushuai; Tomberlin,   David.
The Global Forest Products Model (GFPM) was developed to upgrade the FAO methodology for forest products outlook projections.  Its purpose is to analyze and project the consumption, production, trade, and prices of forest products.  The system deals with 180 individual countries, three classes of roundwood, sawnwood, three kinds of panels, three of pulp, waste paper, and three types of paper and paperboard.  The system is built on market equilibrium theory, with imperfect foresight.  The short-term equilibrium is modeled by price-endogenous linear programming determining production, consumption, trade, and market-clearing prices in any given year, subject to short-term capacities of production.  Year to year changes are represented by equations predicting...
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade.
Ano: 1998
URL: http://purl.umn.edu/14478

Economic Impact of Fusarium Head Blight in Malting Barley: Blending Margins and Firm-Level Risk
Provedor de dados: 31
Autores: Nganje,   William E.; Johnson,   D. Demcey.
FHB and DON present significant challenges to producers, grain elevators, and the brewing industry. Yield reductions and price discounts incurred by producers in North Dakota, Minnesota, and South Dakota averaged about $45.3 million annually during the years 1998 through 2000. Losses are more substantial when secondary economic impacts are considered. For every $1 of scab losses incurred by the producer, $2 in losses are incurred in other areas of rural and state economies. One way of mitigating these losses is to blend barley with DON and barley without DON. Results from the grain blending model show a sharp decline of DON discounts and losses after blending. The average discount fell from $0.57/bu to $0.17/bu in 1998, $0.48/bu to $0.14/bu in 1999, and...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/45723

Economic analysis of site-specific wheat management with respect to grain quality and separation of the different quality fractions
Provedor de dados: 31
Autores: Meyer-Aurich,   Andreas; Gandorfer,   Markus; Weersink,   Alfons; Wagner,   Peter.
The paper analyzes site-specific and uniform management options for wheat production with respect to grain quality. Besides site-specific fertilization the economic potential of segregation of different grain qualities is the subject of this paper. Yield and quality response to fertilizer were taken from field experiments in Germany to calculate site-specific response functions. The economic optima were calculated for uniform management (UM), complete separate management of the subfields (SM), site-specific fertilization (SSF) and grain segregation (GS) for different price structures according to different grain qualities. The results show that over all price structures, highest economic potential was found with SM or SSF compared to UM. However, these...
Tipo: Conference Paper or Presentation
Palavras-chave: Site-specific nitrogen management; Wheat quality; Grain segregation.; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/43649

Farm Management: rethinking directions?
Provedor de dados: 31
Autores: Kemp,   David R.; Girdwood,   John; Parton,   Kevin A.; Charry,   Al A.
Farms and farming are major contributors to the world economy, directly responsible for a large part of GDP. These achievements are not trivial and imply that farms are being managed in reasonably effective ways, else agricultural industries would not be sustained. However has the study of Farm Management within Australia made significant contributions to agriculture or lagged in the background. Is it contributing to better Farm Management or merely cataloguing what has happened? Is it leading or following? During recent years there has been an increasing interest in managing farms more sustainably, with emphasis on issues beyond short-term profitability to encompassing rural communities, ecosystems, biodiversity, ethics of technology and politics. The...
Tipo: Article
Palavras-chave: Farm management; Discipline; Field; Directions; Farm Management.
Ano: 2004
URL: http://purl.umn.edu/120917

Characteristics of resources and the provision of biodiversity and ecosystem services in Germany: the cases of fruit tree meadows and wolf protection
Provedor de dados: 31
Autores: Thiel,   Andreas; Schleyer,   Christian; Plieninger,   Tobias.
Work on common pool resources has paid scant attention to the role of properties of natural resources for the way their provision is governed. This paper scrutinizes determinants of institutions that regulate the provision of biodiversity and ecosystem services. Two cases of maintaining ecosystem services are compared (protection of wolves and management of scattered fruit tree meadows). Distinct characteristics of resources (mobility) and differences in the overarching European regulatory framework explain their different institutional embeddedness. Cost-effectiveness considerations seem to be paramount in the design of institutions. In the case of wolf protection, the state uses its power to modify property rights in order to increase acceptance of wolf...
Tipo: Conference Paper or Presentation
Palavras-chave: Institutions; Governance; Wolf Management; Scattered fruit trees; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/116082

GAME THEORY AND A TIME-OF-MARKET DECISION
Provedor de dados: 31
Autores: Throsby,   C.D.
The contribution of the theory of games to decision making has been twofold. Firstly, it has described and clarified many of those decision complexes which are reducible to a direct conflict of interests ("game") between two or more irreconcilably opposing parties who have some control over the outcome of the conflict. Secondly, it has supplied means of obtaining solutions to some of the problems so posed. The best examples of non-trivial real-world game situations are to be found in warfare and, in the field of business, in duopolies and oligopolies. But the number of applications has been limited to a large extent by some assumptions required by the theory, mainly those which define the strictness of the competition between the players and the degree of...
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 1961
URL: http://purl.umn.edu/22545

DYNAMIC RISK MANAGEMENT UNDER CREDIT CONSTRAINTS
Provedor de dados: 31
Autores: Nyambane,   Gerald G.; Hanson,   Steven D.; Myers,   Robert J.; Black,   J. Roy.
The vast majority of previous studies on farmers' optimal risk management behavior have used static models and on the most part ignored use of borrowing and lending as an alternative method of managing risk In this paper we develop a stylized multi-period risk management model for a risk averse farmer who can use revenue insurance to manage risk and also borrow and lend subject to a credit constraint. The model is applied to an example farm from Adair County in Iowa and the results provide three important messages. First, contrary to the full coverage of actuarially fair insurance result expected from using purely static analysis, at low revenues, insurance coverage may not be taken in the absence of debt. Second, if debt is available, full coverage will...
Tipo: Conference Paper or Presentation
Palavras-chave: Risk and Uncertainty.
Ano: 2002
URL: http://purl.umn.edu/19072

Regional Agricultural Input-Output Model and Countermeasure for Production and Income Increase of Farmers in Southern Xinjiang, China
Provedor de dados: 31
Autores: Jiang,   Qing-song; Zhang,   Xing-ji.
Agricultural input and output status in southern Xinjiang, China is introduced, such as lack of agricultural input, low level of agricultural modernization, excessive fertilizer use, serious damage of environment, shortage of water resources, tremendous pressure on ecological balance, insignificant economic and social benefits of agricultural production in southern Xinjiang, agriculture remaining a weak industry, agricultural economy as the economic subject of southern Xinjiang, and backward economic development of southern Xinjiang. Taking the Aksu area as an example, according to the input and output data in the years 2002-2007, input-output model about regional agriculture of the southern Xinjiang is established by principal component analysis. DPS...
Tipo: Journal Article
Palavras-chave: Regional agriculture; Input-output model; Production and income increase; Principal component analysis; Econometric model，China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/96049

Effects of Specialized Curing on the Income and Behavior of Tobacco Growers
Provedor de dados: 31
Autores: Huang,   Kejiu; Zhang,   Wenping; Ma,   Xiao; Yang,   Chao; Ji,   Xinwei; Song,   Zhaopeng.
Qingshuitang Village near the Qingmuchi Village is taken as the control region, which has similar status of social economy and flue-cured tobacco cultivation and has not implemented specialized curing. Permanent residents above the age of 18 in the two villages are investigated. Due to the dispersibility and randomness of samples, questionnaires are sent out randomly considering the differences in age, sex, education level, economic income and planting area. Excel is used to conduct statistics and analysis of survey data. Result shows that specialized curing has significant higher incentive effect on economic income of tobacco growers than the non-specialized curing. Tobacco growers in specialized curing area have apparently different attentive focus of...
Tipo: Thesis or Dissertation
Palavras-chave: Specialized curing; Economic income; Questionnaire survey; Tobacco growers; Flue-cured tobacco; China; Community/Rural/Urban Development.
Ano: 2009
URL: http://purl.umn.edu/56350

Determinants of Farmers' Resilience towards ENSO-Related Drought: Evidence from Central Sulawesi, Indonesia
Provedor de dados: 31
Autores: Keil,   Alwin; Zeller,   Manfred; Wida,   Anastasia; Sanim,   Bunasor; Birner,   Regina.
Crop production in the tropics is subject to considerable climate variability caused by the El Nino-Southern Oscillation (ENSO) phenomenon. In Southeast Asia, El Niño causes comparatively dry conditions leading to substantial declines of crop yields. In concert with global warming, the frequency and severity of the phenomenon are likely to increase during the 21st century. Little is known about the impact of ENSO-related drought on the welfare of farm households in developing countries. This paper seeks to contribute to closing this knowledge gap with a case study from Central Sulawesi, Indonesia. Its objective is to measure household resilience towards drought periods and identify its influencing factors to deduce policy implications. Using...
Tipo: Conference Paper or Presentation
Palavras-chave: ENSO; Drought resilience; Risk management; Technical efficiency; Indonesia; Farm Management; Q54; Q12.
Ano: 2006
URL: http://purl.umn.edu/25592

Marginality and Restoration of Olive Plantations in Andalusia
Provedor de dados: 31
Autores: Arriaza Balmón,   Manuel; Guzman,   Jose R.; Nekhay,   Olexandr; Gomez-Limon,   Jose Antonio.
This paper presents the first results of the initial stages of a three years research project on optimization of the use of agricultural lands subject to risk of abandonment. After devising a physical marginality index for olive cultivation based on soil quality and slope, we estimate an approximate area of 200,000 hectares of marginal olive plantations in Andalusia. The risk of abandonment of these farmlands increases with the decoupling of the CAP subsidies and with the socio-economic characteristics of the production. The probable abandonment of these areas implies the negative consequences of wild forestation. We present some actions to minimize the negative effects of this process, being the use of grass cover and hedgerows, on an initial qualitative...
Tipo: Conference Paper or Presentation
Palavras-chave: Land abandonment; Marginal olive groves; Biodiversity; Soil erosion and visual quality; Land Economics/Use; H41; Q21; Q26.
Ano: 2005
URL: http://purl.umn.edu/24603

Rio, Kyoto, Marrakesh - groundrules for the global climate policy regime
Provedor de dados: 31
Autores: Michaelowa,   Axel.
After four years of intense negotiations that tethered on the brink of failure, the design of the international climate policy regime that is formed by the U.N. Framework Convention on Climate Change, the Kyoto Protocol and the Marrakesh Accords is now sufficiently clear to be implemented. Apart from the U.S. and Australia, all industrialised countries have now stated that they will ratify the Kyoto Protocol. Industrial countries are subject to binding greenhouse gas emissions targets for the commitment period 2008-2012. Several countries profit from exceptions that weaken the targets. The availability of forestry and agricultural sinks will further lower the necessity for emission reductions. A world market for emission rights will form as the Kyoto...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/26280

Land Abandonment in an Agricultural Frontier After a Plant Invasion: The Case of Bracken Fern in Southern Yucatan, Mexico
Provedor de dados: 31
Autores: Schneider,   Laura; Geoghegan,   Jacqueline.
Plant invasions and their impact on land use pose difficult research questions, due to the complex relationships between the ecological nature of the invasion and the human responses to the invasion. This paper focuses on the linkages between an invasion of bracken fern and land use decisions in an agricultural frontier in southern Mexico. Agriculture in this region is practiced on an extensive basis, using traditional slash-and-burn techniques of temporary cultivation and continuous rotation through forest fallow. We investigate the factors that affect the decision of a subsistence farmer to either continue cultivating an invaded agricultural plot or permanently abandon the plot and cultivate elsewhere. We develop an agricultural household model of land...
Tipo: Journal Article
Palavras-chave: Bracken fern invasion; Land abandonment; Agricultural household model; Mexico; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/10184

FOOD AID FOR MARKET DEVELOPMENT IN SUB-SAHARAN AFRICA
Provedor de dados: 31
Autores: Abdulai,   Awudu; Barrett,   Christopher B.; Hazell,   Peter B.R.
Food aid remains significant for food availability in many low-income countries in sub-Saharan Africa, helping to reduce the gap between food consumption needs and supply from domestic production and inventories and commercial imports. Food aid remains a contentious subject, however, and there have been many recent pleas for more effective use of the resource. This study explores how food aid might be used for domestic food market development to facilitate poverty alleviation and economic growth. There are obvious risks to using food aid for market development, just as there have been in using food aid to try to stimulate agricultural development. Because food aid necessarily expands local food supply, it needs to be well targeted if adverse producer price...
Tipo: Working or Discussion Paper
Palavras-chave: Food Security and Poverty; International Relations/Trade.
Ano: 2004
URL: http://purl.umn.edu/16170

Development in the Midst of Drought: Evaluating an Agricultural Extension and Credit Program in Nicaragua.
Provedor de dados: 31
Autores: Mullally,   Conner.
Abstract: This essay is an evaluation of year one of the Rural Business Development (RBD) program for small rice farmers in León, Nicaragua. The RBD program is administered by the Millennium Challenge Corporation, and is designed to deliver agricultural extension advice and affordable credit in the form of inputs to farm households. This essay estimates the average impact of the program on rice yields and revenues utilizing inverse propensity score weighting combined with linear regression. In conducting statistical inference, it also accounts for the fact that agricultural outcomes are likely correlated over space in a small area such as the one studied here. The results suggest that the program had no impact on average, likely due to the presence of a...
Tipo: Conference Paper or Presentation
Palavras-chave: Development; Agriculture; Extension; Credit; Spatial; Propensity score; International Development.
Ano: 2011
URL: http://purl.umn.edu/108498

SOCIO-ECONOMIC STUDY OF THREE VILLAGES IN BAUCHI STATE, NIGERIA (WITH EMPHASIS ON LABOR UTILIZATION)
Provedor de dados: 31
Autores: Ingawa,   Salisu Ahmed.
Although agriculture no longer serves as the leading contributor to Nigeria's Gross National Product (GNP) and leading foreign exchange earner, it still is the leading employment sector of the vast majority of Nigerian population.  The decline in importance of the agricultural sector in terms of GNP has been partly due to the phenomenal growth in the petroleum sector of the economy.  Other factors of relevance to this decline include a long period of adverse weather conditions, negative overall terms of trade in relation to other sectors of the economy as well as a very disturbing rate of farm urban migration.   The objectives of this paper stem from the realization that in order to solve the problems plaguing small farmer agriculture, as in the study...
Tipo: Thesis or Dissertation
Palavras-chave: Labor and Human Capital.
Ano: 1979
URL: http://purl.umn.edu/11029

URBAN SPRAWL AND OBESITY
Provedor de dados: 31
Autores: Bernell,   Stephanie L.; Plantinga,   Andrew J.; Wu,   JunJie.
In the U.S., urban sprawl and the rise in obesity rates have been two powerful trends during the latter half of the 20th century.  Previous empirical work has found that obesity rates are influenced by labor market outcomes that are fundamentally shaped by the spatial pattern of developed land.  We examine these potential linkages in an urban spatial model augmented to include time allocation and weight.  Residents maximize utility defined over housing, weight, and food subject to a fixed time budget allocated to commuting, calorie expenditure, and work.  We examine how weight is affected by commuting distance, food prices, and the rate of calorie expenditure; how a reduction in transportation costs affects weight throughout the city; and how initial...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2003
URL: http://purl.umn.edu/22004

APPLICATION OF SAMPLING SURVEY IN ESTIMATING AGRICULTURAL STATISTICS OF THAILAND
Provedor de dados: 31
Autores: Buasri,   Prajiad.
Thailand is an essentially agricultural country.  Agriculture provides direct employment to 81 percent of the nation's population.  Approximately one third of the Gross Domestic Product originates in the agricultural sector, including agricultural crops, livestock, fisheries, and forestry.  Substantially more income is earned in the marketing and processing of agricultural commodities.  The major exports of Thailand continue to be primary agricultural products such as rice, rubber, teak, corn, kenaf, cassava, oil seeds, and other upland crops.  These account for 90 percent of total foreign exchange earnings.  Since Thailand has a prosperous agrarian economy, and agriculture continues to be the main economic activity despite the growing importance of other...
Tipo: Thesis or Dissertation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1971
URL: http://purl.umn.edu/10976

A Partial Equilibrium Approach of Modeling Vertical Linkages in the U.S. Flat Rolled Steel Market
Provedor de dados: 31
Autores: Fetzer,   James J.
This paper models linkages between upstream and downstream goods in the U.S. market for flat-rolled steel. These vertical linkages are important to account for when estimating the impact of trade restrictions on imports of flat rolled steel because some types of flat rolled steel are predominately used to produce other types of flat rolled steel and in some cases also make up a large share of their production costs. Previous research has modeled the linkages between upstream and downstream goods with CGE models and vertically linked partial equilibrium models. Drawing upon this literature, this paper builds a vertically linked version of the CES COMPAS model that incorporates vertical linkages as constant cross price elasticities in both downstream supply...
Tipo: Working or Discussion Paper
Palavras-chave: Industrial Organization.
Ano: 2005
URL: http://purl.umn.edu/15862

What are the social impacts of land use restrictions on local communities? Empirical evidence from Costa Rica
Provedor de dados: 31
Autores: Andam,   Kwaw S.; Ferraro,   Paul J.; Holland,   Margaret B.
Global efforts to reduce deforestation rely heavily on protected areas and land use restrictions.  The effect of these restrictions on local communities is currently the subject of heated debate among conservation and development experts.  Measuring the social impacts of protected areas is difficult because the effects cannot be isolated from other factors, given the nonrandom placement of protection.  We address this problem by applying a quasi-experimental approach to establish the counterfactual (“what would have been the socioeconomic outcome if a protected area had not been established?”).  We use matching methods to measure the impacts of pre-1980 protected areas in Costa Rica on socioeconomic outcomes in 2000.  In 2000, neighboring communities near...
Tipo: Conference Paper or Presentation
Palavras-chave: Forest conservation; Social impacts; Quasi-experimental methods; Agricultural and Food Policy; Community/Rural/Urban Development; Environmental Economics and Policy; Food Security and Poverty; International Development; Land Economics/Use; Research Methods/ Statistical Methods; C14; O13; Q23.
Ano: 2009
URL: http://purl.umn.edu/51783

Long-Term Feasibility of Sustainable Citrus-Farming Systems in the Region of Valencia, Spain
Provedor de dados: 31
Autores: Moll,   Elena Maria Peris; Igual,   Juan Francisco Julia.
This paper studies the long-term feasibility of citrus crop, either grown organically or employing integrated production methods, in the Region of Valencia, Spain. The concept of sustainability in agriculture has become a subject of general interest, and obtaining high-quality and safe food standards is a priority of the European Union authorities, especially after the recent crises of the European agrifood system. Citrus production made of 43.3% of Valencia's agricultural production in 2000 (CAPA 2003a), with the Comunidad Valenciana being the primary exporter of citrus for fresh consumption (Peris and Julia 2005a). Production-cost studies of the three orange-production systems used in the region (conventional, IP, and organic) were conducted as the...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/8579

INTERNAL STRUCTURE, ROLE OF THE GOVERNMENT AND EFFICIENCY IN THE USE OF RESOURCES IN SEMI-COLLECTIVE PRODUCTION COOPERATIVE ORGANIZATIONS:  THE CASE OF THE ASENTAMIENTOS CAMPESINOS IN PANAMA
Provedor de dados: 31
Autores: Cedeno,   Augusto A.
This paper has been elaborated in an effort to set the basis for a research on a semi-collective production cooperative program in Panama.  Three aspects are considered to be important when studying the program:  the internal organization of the semi-collective cooperatives to be analyzed; the role of the government in promoting and supporting the program; and the efficiency in the use of resources that the new type of agricultural organization will bring.  Thus, these are the elements on which the present proposal emphasizes.  A general explanation of the program to be analyzed is presented in Chapter II, section C.  Due to some difficulties regarding the sources of information, a very detailed explanation about the nature of the program is not included...
Tipo: Thesis or Dissertation
Palavras-chave: Agribusiness.
Ano: 1976
URL: http://purl.umn.edu/11103

Labelling Issues of Organic and GM Foods in Australia
Provedor de dados: 31
Autores: Chang,   Hui-Shung (Christie).
Growth in the demand for organic foods has been phenomenal in the past decade both in Australia and overseas because organic production is seen to be beneficial to both human health and the environment.  In general, organic products commend a price premium over conventional products.  Since organic attributes cannot be verified easily and there is no control over the use of the word 'organic' in the Australian market, the organic label has been subject to abuse.  Over ten years, the Australian organic industry has called for a domestic regulation, claiming that any incidence of consumer deception and product misrepresentation can result in the loss of consumer confidence and sales, and more importantly, hinder future industry growth.  However, the...
Tipo: Working or Discussion Paper
Palavras-chave: Organic foods; GM foods; Food labelling.; Agribusiness; Marketing; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/12934

Survey on the Peasants' Will of Forest Land Transfer in the Reform of Collective Forest Right System - On the Case of 180 Peasant Households in Lishui City of Zhejiang Province
Provedor de dados: 31
Autores: Li,   Zhi.
Taking sample survey in the eighteen villages of Yunhe, Longquan and Qingyuan County of Lishui City of Zhejiang Province, the results show that the forest land transfer of sample peasants is mainly transfer-out. The private treaty of forest land transfer is the main pattern of most peasant households, forest right trading market hasn't got wide approval in peasants, peasants' dependence on land is reducing, and so on. Through analysis, the reasons of influent transfer of forest land include peasants’ subjective will, less type of transfer objects, dull information communication, big difference of expected price and imperfect development of intermediary organization. In order to promote a healthy development of forest land transfer, the paper puts forward...
Tipo: Article
Palavras-chave: Reform of forest right system; Transfer of forest land; Intermediary organization; Properly right; China; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/122943

Environmental offsets and other market approaches with specific reference to the Olifants River (East) and Berg River
Provedor de dados: 31
Autores: Nieuwoudt,   W. Lieb.
Biodiversity offsets for a river create the incentive for cooperation amongst stakeholders with benefits to the environment. Because of the isolation paradox supporting institutions need to be created to facilitate cooperation. Environmental pollution caused by mining activity is a problem in the Olifants River (East) in South Africa. The catchment surface is fractured by mining activities and water is drained into underground aquifers, after which it seeps into streams. Mines have been permitted to release nutrients in the streams during periods of high flow, which is called the “controlled release scheme”. A main problem is the effluent leakage from old disused mines during times when river flow is low and not sufficient dilution of nutrients is...
Tipo: Journal Article
Palavras-chave: Environmental offsets; Pollution permits; Olifants River (East).
Ano: 2008
URL: http://purl.umn.edu/47655

Do Taxes on Large Firms Impede Growth? Evidence from Ghana
Provedor de dados: 31
Autores: Gollin,   Douglas.
Many developing countries pursue policies that treat large and small firms differently. For example, large firms may be subject to a value added tax while small firms are explicitly exempted. Moreover, governments often find it impractical to collect taxes from the smallest enterprises; this may increase the tax burden for larger firms, whose compliance can be enforced. Such policies clearly affect the size distribution of firms. But how great is the impact on macro variables? How large are the resulting inefficiencies? And what are the dynamic effects on capital accumulation and economic growth? This paper uses a dynamic general equilibrium variant of the Lucas (1978) span-of-control model to address such questions. The model is matched to data from the...
Tipo: Working or Discussion Paper
Palavras-chave: Public Economics.
Ano: 1995
URL: http://purl.umn.edu/7488

The Value of USDA Situation and Outlook Information in Hog and Cattle Markets
Provedor de dados: 31
Autores: Isengildina,   Olga; Irwin,   Scott H.; Good,   Darrel L.
The economic value of public situation and outlook information has long been a subject of debate. The purpose of this study is to investigate the economic value of USDA reports in hog and cattle markets. The investigation is based on event study analysis, with the "events" consisting of the release of six major USDA situation and outlook reports for hogs and cattle from 1985 through 2003. These include Cattle, Cattle on Feed, Cold Storage, Hogs and Pigs, Livestock, Dairy and Poultry Outlook (LDPO), and World Agricultural Supply and Demand Estimates (WASDE) reports. As a result of the process of modeling volatility of hog and cattle prices, a TARCH-in-mean model was specified that closely followed the distribution of these price movements. The effects of...
Tipo: Conference Paper or Presentation
Palavras-chave: Livestock Production/Industries; Marketing.
Ano: 2005
URL: http://purl.umn.edu/19050

INVERSE PRODUCTIVITY: LAND QUALITY, LABOR MARKETS, AND MEASUREMENT ERROR
Provedor de dados: 31
Autores: Lamb,   Russell L.
Downloads May 2008-December 2009:  153
Tipo: Report
Palavras-chave: Labor and Human Capital; Productivity Analysis.
Ano: 2001
URL: http://purl.umn.edu/57540

The Evolution and Classification of the Published Books of Clem Tisdell: A Brief Overview
Provedor de dados: 31
Autores: Tisdell,   Clement A.
This paper outlines the evolution and classification of the major works (published books) of Clem Tisdell. To do this it divides these books into six categories. 1. Those focusing on knowledge limitations and, the presence of uncertainty (information economics). These develop microeconomic theory and apply it to policy issues. Subjects covered include the operation of market systems, the economics of decision-making, managerial economics, science and technology policy, bounded rationality, and evolutionary economics. 2. Textbooks on microeconomics and basic economics. 3. Ecological, natural resource and environmental economics. 4. Tourism economics and leisure studies. 5. Economic development in general and in particular, Asian-Pacific countries or...
Tipo: Working or Discussion Paper
Palavras-chave: Clem Tisdell; Bounded rationality; Microeconomics; Environmental economics; Tourism economic; Leisure studies; Asian-Pacific countries; Teaching/Communication/Extension/Profession.
Ano: 2007
URL: http://purl.umn.edu/90548

Labelling issues of organic and GM foods in Australia
Provedor de dados: 31
Autores: Chang,   Hui-Shung (Christie).
Growth in the demand for organic foods has been phenomenal in the past decade both on Australia and overseas because organic production is seen to be beneficial to both human health and the environment. In general, organic products commend a price premium over conventional products. Since organic attributes cannot be verified easily and there is no control over the use of the word "organic" in the Australian market, the organic label has been subject to abuse. Over ten years, the Australian organic industry has called for a domestic regulation, claiming that any incidence of consumer deception and product misrepresentation can result in the loss of consumer confidence and sales, and more importantly, hinder future industry growth. However, the Government...
Tipo: Conference Paper or Presentation
Palavras-chave: Organic foods; GM foods; Food labelling; Agricultural and Food Policy.
Ano: 2004
URL: http://purl.umn.edu/58392

DYNAMICS OF AGRICULTURAL WAGE AND RICE PRICE IN BANGLADESH: A RE-EXAMINATION
Provedor de dados: 31
Autores: Rashid,   Shahidur.
Like many other Asian countries, the causal relationship between agricultural productivity and the incidence of rural poverty has been a widely debated subject in Bangladesh. A number of studies argued that the real agricultural wage rate was declining during the period when the country had experienced overall agricultural growth. This paper contributes to this debate in two ways: i) it reexamines the methodological aspects of past studies and presents alternative estimates; and ii) analyzes dynamics of agricultural wage and rice price using the most recent data. Multivariate co-integration techniques are used to examine the long and short-run relationships among agricultural wage rate, rice price, urban wage rate, and other prices. The results show that...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Labor and Human Capital.
Ano: 2002
URL: http://purl.umn.edu/16226

PEDAGOGIA DA ALTERNANCIA E DESENVOLVIMENTO LOCAL
Provedor de dados: 31
Autores: Caliari,   Rogerio Omar; Alencar,   Edgard; Amancio,   Robson.
This work aimed at studying the contributions from the alternative rural educational practices in the process of construction of local development. In this context the study sought to understanding the manifestations of local development expressed in Comunidade do Giral-ES (Giral Community) and its relationship with the incorporation of knowledge by means of rural education. So, the variables related with the pedagogical practices which adopt the Alternance Pedagogy, its role in the building of the local development, its practice in the rural multicultural revalorization and its performance in the transforming performance of the subject as an agent of his own history. For the obtainance of information qualitative research techniques were used, for we see...
Tipo: Journal Article
Palavras-chave: Local development; Alternance pedagogy; Popular participation; Rural education; Desenvolvimento local; Pedagogia da alternância; Participação popular; Educação rural.; Community/Rural/Urban Development; Consumer/Household Economics; Teaching/Communication/Extension/Profession.
Ano: 2002
URL: http://purl.umn.edu/101919

A financial analysis of the impact of sheep on the risks and returns associated with mixed enterprise dryland farming in south-eastern Australia: Part II
Provedor de dados: 31
Autores: Hutchings,   Timothy R.
This paper extends the long-term cash-flow simulations reported in Part I (Hutchings 2009) to include a range of seasonal scenarios at four representative dryland sites in south-eastern Australia. The effect of varying the proportion of sheep and cropping in the enterprise mix at each site on cash surpluses is discussed. The analysis shows that, for most sites, the cropping enterprises require better than average seasons, prices and water-use efficiencies to generate a positive cash flow and are subject to substantial variability and risk of loss. In contrast, the sheep enterprises show small but stable cash flows in all but extreme drought conditions. This paper emphasises the need to include site-specific, long-term variability and whole-farm costs in...
Tipo: Article
Palavras-chave: Whole-farm planning; Cash flow; Sheep; Crops; Risk; Farm Management.
Ano: 2010
URL: http://purl.umn.edu/121495

Estimation of Cost Pass Through to Michigan Consumers in the ADM Price Fixing Case
Provedor de dados: 31
Autores: Cotterill,   Ronald W.
This report analyzes the economic impact of price fixing in the wet corn milling industry on consumers in the State of Michigan. Two of the companies who produce citric acid have pleaded guilty to fixing its price. In this report we assume that price fixing also occurred among HFCS producers. Given the structure of the corn wet milling industry and the direct purchaser industries, the overcharge is essentially uniform across buyers and selling arrangements. We develop an actual economic model of price transmission based upon the three facts: 1) The overcharge as a percent of the processed product value at wholesale and at retail is small, 2) Fixed proportion technology, and 3) consumers have imperfect information about prices so a small price change has no...
Tipo: Working or Discussion Paper
Palavras-chave: Price fixing; Overcharge; Cost pass through; Fixed proportion production technology; Flexible demand specifications; Competitive structure; Agribusiness; Crop Production/Industries; Demand and Price Analysis.
Ano: 1998
URL: http://purl.umn.edu/25148

Technical Documentation of the Regional Manure Management Model for the Chesapeake Bay Watershed
Provedor de dados: 31
Autores: Aillery,   Marcel P.; Gollehon,   Noel R.; Breneman,   Vincent E.
The Regional Manure Management Model, developed for the ERS project on "Manure Management for Improved Water Quality," is used to evaluate the cost and feasibility of manure land application as a manure management strategy at the regional level. This model is a nonlinear mathematical programming model of animal manure-nutrient production and distribution applied to the Chesapeake Bay watershed. The model is designed to assess regional costs of manure management, transport, and land application in the Chesapeake Bay watershed, given the existing structure of the animal industry and manure-storage technologies currently in use. Manure-nutrient production is allocated within the basin to minimize costs to the animal sector, subject to land availability and...
Tipo: Report
Palavras-chave: Technical documentation; Regional analysis; Chesapeake Bay; Animal waste; Manure management; Nutrient management plan; Manure land application; Manure transport; Cost minimization; Optimization model; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/33570

EU Policy-Making: Reform of the CAP and EU Trade in Beef &amp; Dairy with Developing Countries
Provedor de dados: 31
Autores: Halderman,   Michael; Nelson,   Michael Byron.
The present study is part of the PPLPI effort to identify significant political and institutional factors and processes that currently hinder or prevent the poor in developing countries from taking greater advantage of opportunities to benefit from livestock. The study examines the political economy of policy-making concerning trade in livestock and livestock products (LLPs) between the European Union (EU) and developing countries (DCs).   The main objective is to determine and assess how relevant EU policy is made, including the role of key actors and forces both domestic and international. The political economy of relevant LLP trade-related issues are examined at four levels: (a) the EU member state, (b) the European Union itself, (c) the international...
Tipo: Working or Discussion Paper
Palavras-chave: European Union; Common Agricultural Policy (CAP); Policy Making; Trade; Developing Countries; Livestock; Beef; Dairy; Agricultural and Food Policy; Livestock Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/23758

CROP PRODUCER RISK MANAGEMENT SURVEY: A PRELIMINARY SUMMARY OF SELECTED DATA; A REPORT FROM THE UNDERSTANDING FARMER RISK MANAGEMENT DECISION MAKING AND EDUCATIONAL NEEDS RESEARCH PROJECT
Provedor de dados: 31
Autores: Coble,   Keith H.; Knight,   Thomas O.; Patrick,   George F.; Baquet,   Alan E.
Changes in the risk environment and tools available to manage risk have resulted in an increased need for risk management skills among farmers and ranchers.  In response the USDA initiated a risk management education competitive grants program in the spring of 1998.  This is the first report from one of the grant-funded projects.  The project's primary objective is to provide supporting research that will contribute to the design and implementation of effective risk management education programs, policies and tools.  This report provides selected summary statistics, without analysis, from a survey of crop producers conducted as part of the first phase of the project.  Over 1,800 usable producer responses from Mississippi, Texas, Indiana, and Nebraska are...
Tipo: Working or Discussion Paper
Palavras-chave: Risk Insurance Marketing Policy; Risk and Uncertainty.
Ano: 1999
URL: http://purl.umn.edu/15805

BIOMASS ELECTRIC POWER PLANTS: LAND USE IMPACTS FOR FORESTRY AND AGRICULTURE
Provedor de dados: 31
Autores: Rose,   Dietmar W.; Husain,   Syed A.
Sharply increasing timber prices in Minnesota reflect an imbalance in the ageclass distribution of the cover types that are most important to the forest industry.  This paper examines the potential contributions that short-rotation forest crops grown on marginal agricultural lands can make in producing biomass for wood-base power plants and in supplying wood to the forest industry. A large-scale regional scheduling model was used to allocate forest and agricultural lands in order to minimize wood production costs for forest industry as well as power plant uses. Alternative potential sites for a wood-based power plant were examined in terms of wood production costs and of transportation implications. Preliminary recommendations as to the most appropriate...
Tipo: Conference Paper or Presentation
Palavras-chave: Wood energy; Short-rotation forestry; Agricultural tree production; Timber supply costs; Harvest scheduling; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 1998
URL: http://purl.umn.edu/14490

MODELLING FARMS' PRODUCTION DECISIONS UNDER EXPENDITURE CONSTRAINTS
Provedor de dados: 31
Autores: Bokusheva,   Raushan; Kumbhakar,   Subal C.
Limited budget for the purchase of variable inputs might adversely affect producer's input use decisions and might result in a non-optimal input usage. If expenditure constrains are present and binding, unconstrained profit-maximization is not valid for modelling producers' input use decisions. In this paper we apply the indirect production function approach which describes output maximization subject to a given technology, a set of quasi-fixed inputs and a given budget for the purchase of variable inputs. By employing the indirect production function in the stochastic frontier framework we can estimate producer's output loss due to both expenditure constraints and technical inefficiency. Our estimation results show that most of the study farms were...
Tipo: Conference Paper or Presentation
Palavras-chave: Indirect production function; SFA; Expenditure constraints; Technical efficiency; Russian agriculture; Farm Management; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/6641

An Optimal Control Framework to Address the Relationship between Water Resource Management and Water-Borne Health Impacts:  Focus on the Texas Lower Rio Grande Valley
Provedor de dados: 31
Autores: Leidner,   Andrew J.; Lacewell,   Ronald D.; Rister,   M. Edward; Sturdivant,   Allen W.
The objective of this study is develop a theoretical model that can evaluate two types of public health expenditures on water-borne health risks: water-related municipal services, an ex ante preventative measure against water-borne contamination, and medical treatment, an ex post treatment of the water-borne pollutant’s harmful effects on human health.  The modeled community can allocate resources in either centralized-municipal water-services, point-of-use water-services, or medical intervention, with expenditures subject to a budget constraint.  The movement of a water-borne illness through the community is modeled with a susceptible-infected-susceptible (SIS) disease framework.  An optimization framework is developed, including a statement of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Water; Public health; Rural development; Dynamic optimization; Community/Rural/Urban Development; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/98806

The Dual of the Least-Squares Method
Provedor de dados: 31
Autores: Paris,   Quirino.
Econometrics
Tipo: Working Paper
Palavras-chave: Least squares; Primal; Dual; Pythagoras theorem; Noise; Value of sample information; Research Methods/ Statistical Methods; C20; C30.
Ano: 2012
URL: http://purl.umn.edu/121693

An empirical examination of the gains in cost-effectiveness from the use of multiple environmental outcome conservation tenders
Provedor de dados: 31
Autores: Edwards,   Claire; Eigenraam,   Mark.
The production and consumption of environmental goods and services are subject to many of the problems associated with public goods. Due to their non-rival and non-excludable nature, incentives for individuals to invest in their production are often absent. To address this market failure, government agencies have used a number of policy mechanisms to procure the supply of environmental outcomes on behalf of society. Recently, conservation tenders focussing on private land have been a favoured policy instrument used by many government agencies to purchase environmental outcomes in the public interest. The majority of these environmental tenders have focussed on a single environmental outcome. It is contended in this paper that multiple environmental...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/100545

REBORN OF ROMANIAN BRANDS BY E-COMMERCE
Provedor de dados: 31
Autores: Voicilas,   Dan-Marius.
Review article
Tipo: Article
Palavras-chave: Brands; E-commerce; Strategies; Romania; Marketing; L10; L17.
Ano: 2012
URL: http://purl.umn.edu/123961

GESTÃO DE DISTRIBUIÇÃO DAS EMPRESAS ATACADISTAS DE FLV NA REGIÃO METROPOLITANA DE RECIFE - PE: O CASO DE DUAS EMPRESAS
Provedor de dados: 31
Autores: Mendes,   Luciene Nascimento; Silva,   Jearbes Alexandre da; Favero,   Luiz Andrea.
The national market for FLV (fruits, legumes and vegetables) has grown significantly in recent years. However, due to the high perishability of these products, their quality is subject to appropriate processes of standardization, selection, classification, packaging and transportation to avoid losses, which are high. This requires a complete harmony between the players/agents in this market to offer the consumer high quality products with speed and efficiency. Since the producers rarely perform these procedures, it is up to the segments, such as the wholesale segment, represented by CEASAs and wholesaler companies. Thus, this study sought to analyze the systems of two marketing wholesaler companies of fruits, legumes and vegetables in the metropolitan area...
Tipo: Journal Article
Palavras-chave: Supply Chain Management; Transaction Cost Economics; Wholesale; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2009
URL: http://purl.umn.edu/90696

Identifying Agricultural Research and Development Investment Opportunities in Sub-Sahara Africa; A Global, Economy-Wide Analysis
Provedor de dados: 31
Autores: Ehui,   Simeon K.; Tsigas,   Marinos E.
Sub-Saharan Africa (SSA) is the most important development challenge of the 21st century. Poverty is higher in most African countries than elsewhere in the developing world. According to the recently published Report of the Commission for Africa, economic growth in Africa is necessary for substantially reducing poverty. Among three proposed policy options, the Commission recommends that African countries invest significantly in agriculture. But policy makers in the region face a dilemma: which subsector within agriculture will yield the highest return for a given budget? This paper uses a computable general equilibrium model to simulate productivity gains in sub-Sahara African agriculture subject to trade-offs between gains in crops and gains in livestock....
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/25527

Bedeutung und Entwicklung des Biologischen Landbaus in der Schweiz
Provedor de dados: 31
Autores: Leumann,   Markus; Weilenmann,   Daniel.
Organic farming has rapidly grown in Switzerland in the past years. It is now well established in agriculture and accepted by consumers. However, recent developments show declining growth rates. This raises the question of the future that can be expected for organic farming in Switzerland.  Future trends and potentials of organic farming in Switzerland made subject of two diploma theses in which prospects of the dairy and livestock sector and the fruit and vegetable sector were analysed. With a linear optimization model (farm level), taking into account probable future conditions, the development of supply was estimated. The future evolution of consumer demand was assessed by the means of a qualitative analysis. The analysis of supply and demand showed...
Tipo: Journal Article
Palavras-chave: Agribusiness.
Ano: 2005
URL: http://purl.umn.edu/32008

Impacts of Collective Action on Smallholders' Commercialisation: Evidence from Dairy in Ethiopia
Provedor de dados: 31
Autores: Francesconi,   Gian Nicola; Ruben,   Ruerd.
The impacts of collective action on smallholders' commercialisation are the subject of a heated global debate. This study aims at bringing some empirical evidence into this debate. To do so we collected a unique set of bio-economic data, in 2003 and 2006, comprising information from 50 cooperative farmers and 50 individual farmers located within the same milk-shed in proximity of Addis Ababa. This dataset allowed comparing commercial performance of individual and cooperative dairy farmers, across 2003 and 2006. The empirical findings obtained with an adapted difference in difference analysis suggest that dairy cooperative farmers outperform the otherwise similar individual producers in terms of quantitative performance (market access, herd size and...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2007
URL: http://purl.umn.edu/9418

OPERATIONAL EFFICIENCY OF A U.S./CANADIAN WHEAT POOL:  A GAME THEORY ANALYSIS
Provedor de dados: 31
Autores: Nganje,   William E.; Koo,   Won W.; Park,   Joon J.; Taylor,   Richard D.
The problem of declining wheat prices and excess supply has been the subject of recent economic studies partly because it coincides with the Federal Agriculture Improvement and Reform (FAIR) Act of 1996, and partly because efforts to decrease supply domestically have led to increased imports from Canada.  This paper develops a game theory optimization model of market efficiency and derives conditions under which voluntary pooling is sustained for U.S./Canadian durum and hard red spring wheat producers.  Analysis reveals that U.S. and Canadian farmers can increase farm returns with efficiency gains from pooling and by internalizing benefits from grain blending and logistics.  The model is used to analyze diverse factors affecting the sustainability of such...
Tipo: Working or Discussion Paper
Palavras-chave: Voluntary pooling; Game theory; Efficiency gains; Durum and HRS wheat marketing; Crop Production/Industries; Marketing.
Ano: 2001
URL: http://purl.umn.edu/23661

APPROACHES TO RURAL DEVELOPMENT IN TAIWAN (A CASE STUDY)
Provedor de dados: 31
Autores: Nair,   K. Damodaran.
The purpose of this paper is not to inquire into the role of agricultural sector in the economic growth of Taiwan.  That has been done by many in the past.  Rather, the main purpose of this paper is to review and discuss a few institutional approaches to agricultural and rural development on Taiwan which are considered to have played more significant roles, viz. The Joint Commission on Rural Reconstruction, the Farmers' Associations, Land Reform Program, Research and Education and the Four Year Economic Plans.  An attempt also will be made to identify the effects of these institutions on the socio-economic life of the people in the rural Taiwan.  Agricultural and rural development has been a subject for study and discussion among those who have focused...
Tipo: Thesis or Dissertation
Palavras-chave: Community/Rural/Urban Development.
Ano: 1969
URL: http://purl.umn.edu/10978

A HEALTHY SCHOOL MEAL ENVIRONMENT:  FOOD ASSISTANCE RESEARCH BRIEF
Provedor de dados: 31
Autores: Ralston,   Katherine L.; Buzby,   Jean C.; Guthrie,   Joanne F.
A "healthy school meal environment" not only gives students opportunities to make healthy meal choices but also encourages them to do so. The extent to which a healthy school meal environment affects the success of USDA's school meals programs is currently a subject of debate. The policy strategies that can be used to encourage such an environment for the National School Lunch Program (NSLP) and the School Breakfast Program (SBP)also are subjects of debate.  Environmental factors considered to be important include: (1) the nutritional quality, variety, and acceptability of program meals; (2) meal scheduling; (3) nutrition education; and (4) sales of non-USDA ("competitive") foods. Other factors contributing to an overall healthy nutrition environment in...
Tipo: Report
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2003
URL: http://purl.umn.edu/33845

Can Food Stamps Do More to Improve Food Choices?  An Economic Perspective--How Can We Tell If We Are Making a Difference?  ERS Efforts To Improve Evaluation of Nutrition Outcomes
Provedor de dados: 31
Autores: Frazao,   Elizabeth; Guthrie,   Joanne F.; Smallwood,   David M.
Currently, the effects of the Food Stamp Program on the food choices and diet quality of participants are the subject of much debate. Improved evaluation of the nutrition and health effects of the program would be of use to program and policy officials, but most of the existing research is limited by three key factors: the difficulty in separating the effect of the program itself from other factors that may be related to program participation (that is, selection bias); relative age of the data (which do not capture current programs or population behaviors); and use of outdated dietary standards and assessment methods. This brief describes current ERS activities to address these problems and improve evaluation.
Tipo: Report
Palavras-chave: Food Stamp Program; Food consumption; Food prices; Food expenditures; Nutrition education; Behavioral economics; Food choices; Diet; Health; Fruits and vegetables; Food Assistance and Nutrition Research Program; FANRP; ERS; USDA; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; Institutional and Behavioral Economics.
Ano: 2007
URL: http://purl.umn.edu/59439

Dynamic Optimization of Area Revenue Insurance and Consumption Smoothing
Provedor de dados: 31
Autores: Lin,   Shanshan; Mullen,   Jeffrey D.; Wetzstein,   Michael E.
This study examines the interaction between insurance, credit and liquidity constraints using a stochastic dynamic model. A risk averse farmer whose objective is to manage both production and market risk is assumed to maximize the expected utility of life-time consumption by using both area revenue (AR) insurance and consumption smoothing subject to a credit constraint. The dynamic programming is coded in MATLAB using DDPSOLVE algorithm (Appendix a). DSSAT crop simulation model is used to determine optimal irrigation strategy and to simulate farm level yield. A Bayesian Model is used to estimate expected county-level revenue. The approach and results are illustrated via a numerical example using county level data from Mitchell County in Georgia. Results...
Tipo: Conference Paper or Presentation
Palavras-chave: Area Revenue Insurance; Consumption Smoothing; Credit Risk; Dynamic Optimization; Bayesian Modeling; Agricultural Finance; Farm Management; Financial Economics.
Ano: 2010
URL: http://purl.umn.edu/61419

Nonpoint Source Abatement Costs in the Kentucky River Watershed
Provedor de dados: 31
Autores: Liu,   Zheng; Schieffer,   Jack; Hu,   Wuyang; Pagoulatos,   Angelos.
A growing share of water pollution in the U.S. can be attributed to nonpoint sources (USEPA 2002). Some of this trend can be attributed to declining point source (PS) emissions as a result of regulation under the Clean Water Act (CWA). However, fertilizer-intensive practices used to improve agricultural productivity over recent decades have also increased nitrate loads and resulted in water quality impairments. Nonpoint source (NPS) pollution from agricultural practices is generally exempt from federal regulation. However, some voluntary programs allow point sources subject to the CWA’s effluent limitations to meet their standards by purchasing offset credits reflecting reductions in NPS discharges to the same waters (USEPA 2004). Such water quality...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/103633

IS THE "STANDARD REAL OPTIONS APPROACH" APPROPRIATE FOR INVESTMENT DECISIONS IN HOG PRODUCTION?
Provedor de dados: 31
Autores: Balmann,   Alfons; Musshoff,   Oliver.
Applications of the real options approach hardly consider investment returns to be the result of competitive markets such as markets for agricultural products. The reason is probably that Dixit and Pindyck (1994, ch. 8) show in their very popular book "Investment under Uncertainty" that the investment triggers of firms in competitive markets are equal to those of firms with exclusive options. In this study, however, it is shown that this result is restricted to markets in which assets have infinite lifetime. If assets are subject to depreciation and subsequent reinvestment opportuni-ties, competition leads to significantly lower investment triggers. The reason is that depreciation of replaceable assets allows to compensate the potential decline in returns...
Tipo: Conference Paper or Presentation
Palavras-chave: Livestock Production/Industries.
Ano: 2002
URL: http://purl.umn.edu/19897

The Provision of Ecosystem Services by Agriculture – a Spatially Explicit DEA Approach
Provedor de dados: 31
Autores: Kapfer,   Martin; Hübner,   Rico; Eckstein,   Karin; Ziesel,   Sigrid; Kantelhardt,   Jochen.
According to the concept of ecosystem services, agriculture not only provides commodities but also cultural and regulating services. While it is easy to value commodity production by market prices, the valuation of cultural and regulating services is complex because of their public good character. Non-parametric approaches such as the Data Envelopment Analysis (DEA) allow for estimating the contribution of agriculture to such services. However, it is not enough to know the extent of ecosystem services provided; it is also necessary to be aware of which farmers provide these services and where they are provided. In this paper, we suggest a plot-specific approach combining GIS analysis and DEA models. This allows a spatially explicit assessment of...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural land use; Data envelopment; Environment-oriented technical efficiency; Landscape-appearance-oriented technical efficiency; Land Economics/Use; Q12; Q26; Q57.
Ano: 2011
URL: http://purl.umn.edu/108954

FARMERS’ SURVIVAL STRATEGIES IN THE NORTH OF SCOTLAND
Provedor de dados: 31
Autores: Bergmann,   Holger; Thomson,   Kenneth J.
Small and medium-sized farms all over Europe guarantee their survival by a broad range of strategies and different income sources. In remoter areas of highly developed countries such as the UK, such strategies may be expected to have their own characteristics, both legislative and socio-economic. This paper reports results from a socio-economic survey carried out among 40 Scottish agricultural households in the Caithness and Sutherland region of the North of Scotland, focussing specifically on the diversification strategies of (larger) farms and (smaller) crofts related to the multifunctionality of agriculture. After analysing the land, labour and capital use of farm/croft households in the region, the paper analyses why farms/crofts in this remote area...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm households; Scottish Highlands; Income sources; Diversification; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Q12; Q15; R20; R10.
Ano: 2009
URL: http://purl.umn.edu/52832

Transaction costs in agri-environmental schemes: the principal-agent-point of view
Provedor de dados: 31
Autores: Weber,   Anja Michaela; Nuppenau,   Ernst-August.
Agri-environmental schemes provide payments for farmers in return for environmental services. Their implementation induces transaction costs for administration and farmers. Although transaction costs became subject of research in recent years, little attention has been paid to activities which create them. This paper uses insights from Principal-Agent-Theory to show, how information gaps between contracting partners result in tradeoffs inducing activities conducted at implementation level. A Grassland Extensification Scheme, provided in Hesse, Germany, serves as a case-study. The paper shows that attempts and incentives to overcome informational gaps are different for administration and farmer. Further, attempts to reduce transaction costs of own...
Tipo: Conference Paper or Presentation
Palavras-chave: Agri-environmental schemes; Transaction costs; Principal-agent-theory; Hesse; Germany; Community/Rural/Urban Development; Q18; Q23.
Ano: 2010
URL: http://purl.umn.edu/94919

Bioenergy and Agriculture: Promises and Challenges
Provedor de dados: 31
Bioenergy—that is, biofuels of biological and renewable origin, like bioethanol, biodiesel, and biomass for energy—is the subject of increasing attention around the world. Oil prices have climbed to unprecedented heights, and concerns about the environmental effects of fossil fuel use are on the rise. Bioenergy appears to offer hope for addressing these concerns while also providing new opportunities for poor people and farmers in developing countries. Can bioenergy fulfill the promise claimed by its proponents? Can it become an environmentally sustainable, economically viable, pro-poor source of energy? And what challenges will meeting these goals present? This set of policy briefs examines the potential opportunities and risks bioenergy may pose for poor...
Tipo: Report
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/44261

AUSTRALIAN TRADE POLICY: COMMENT AND QUESTION
Provedor de dados: 31
Autores: Crawford,   John G.
I have a threefold purpose:-  Firstly: to repeat and review briefly some of the things I have been saying in the last few months about Australian trade policy.  Secondly: to bring to light three or four of the more important questions or issues which arise in the course of a generalised statement of Australian trade policy. To comment in this way may give rise to rather unbalanced digressions: I believe the risk worth taking.  Thirdly: flowing readily enough from these two will come a plea for more public debate on policy issues. No less important will be a correlative plea for more work to be done by economists (using the Adam Smith concept of political economist) on the many important variables in the debate, about which more needs to be known.  I cannot...
Tipo: Journal Article
Palavras-chave: International Relations/Trade.
Ano: 1959
URL: http://purl.umn.edu/22305

NOTES ON THE A.M.P. SOCIETY'S LAND DEVELOPMENT SCHEME IN SOUTH AUSTRALIA
Provedor de dados: 31
Autores: Bell,   Harold F.; Cairns,   W.H.
Land development in the so-called "Ninety-Mile Desert" area of South Australia can now be regarded as having passed the experimental stage. This, of course, is not to infer that the land brought into production by the A.M.P. Society, or by others undertaking development in this region, is insulated against all likely risks, nor that all land in the area is suitable for and capable of development. Like other components of the rural sector this area can be expected to experience from time to time climatic variations, stock and plant diseases, and product price fluctuations which may materially affect its well-being. But, subject to this reservation, it can fairly be claimed that the A.M.P. Society's work has substantially vindicated on a wide front the...
Tipo: Journal Article
Palavras-chave: Land Economics/Use.
Ano: 1958
URL: http://purl.umn.edu/22638

HOUSEHOLDS' EXPERIENCES WITH THE RED IMPORTED FIRE ANT IN SOUTH CAROLINA
Provedor de dados: 31
Autores: Dukes,   F.R.; Miller,   Stephen E.; Henry,   Mark S.; Vander Mey,   Brenda J.; Horton,   Paul M.
The red imported fire ant (Solenopsis invicta), abbreviated as RIFA, is believed to have been brought by accident to Mobile, Alabama in the 1930s via ship ballast from South America.  The RIFA was first reported in Charleston and Orangeburg counties in South Carolina in 1952 and has since spread to all 46 counties in the state. The RIFA has had adverse impacts on the environments it has infested.  In natural environments, the young of ground-nesting insects, reptiles, birds and mammals are subject to RIFA predation.  In agriculture, the RIFA damages crops and livestock.  The RIFA poses a health threat to humans, as it is aggressive and has a venomous sting. To learn more about the current impacts of the RIFA, a random sample of South Carolina households...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/18799

INDONESIAN NATURAL RUBBER:  AN ECONOMETRIC ANALYSIS OF ITS EXPORT SUPPLY AND FOREIGN IMPORT DEMAND
Provedor de dados: 31
Autores: Soependi,   Ida Yunia.
This study is concerned with a quantitative examination of the Indonesian natural rubber. The main objective of the study is to analyze the nature of the supply of and demand for Indonesian natural rubber. To meet the above objective a simultaneous equation model was developed consisting of fifteen behavioral equations and six definitional identities which are hypothesized to describe the annual structure of the Indonesian natural rubber and its place in the world market for the period 1970 through 1990. The Micro-TSP computer software package was used to carry out the analysis in this study. The data used were primarily taken from several sources.   The study found that production and export supply of Indonesian natural rubber, demand for rubber both in...
Tipo: Thesis or Dissertation
Palavras-chave: International Relations/Trade.
Ano: 1993
URL: http://purl.umn.edu/11183

Economic Impacts of Pink Hibiscus Mealybug in Florida and the United States
Provedor de dados: 31
Autores: Ranjan,   Ram.
Replaced with revised version of paper 12/15/05.
Tipo: Conference Paper or Presentation
Palavras-chave: Invasive Species; Political Economy; Tariffs; Bargaining; Interest Groups; International Relations/Trade; H23; Q17; Q58.
Ano: 2005
URL: http://purl.umn.edu/19172

Preventing Monopoly or Discouraging Competition? The Perils of Price-Cost Tests for Market Power in Electricity
Provedor de dados: 31
Autores: Brennan,   Timothy J.
Allegations of market power in wholesale electricity sales are typically tested using price-cost margins. Such tests are inherently suspect in markets-such as electricity-that are subject to capacity constraints. In such markets, prices can vary with demand while quantity, and thus cost measure, remain fixed. Erroneous conclusions are more likely when the proxy for marginal cost is the average operating cost of the marginal plant. Measured this way, high Lerner indexes are consistent with competitive behavior. Using this proxy to cap wholesale prices, as the U.S. Federal Energy Regulatory Commission has proposed, would discourage entry by making it impossible for peak power suppliers to recover capital costs. The wholesale electricity sector may be...
Tipo: Working or Discussion Paper
Palavras-chave: Market power; Electricity; Peak load pricing; Resource /Energy Economics and Policy; D42; L11; L51; L94.
Ano: 2002
URL: http://purl.umn.edu/10804

Electricity Sector Reform in Developing Countries: An Econometric Assessment of the Effects of Privatisation, Competition and Regulation
Provedor de dados: 31
Autores: Zhang,   Yin-Fang; Kirkpatrick,   Colin; Parker,   David.
Over the last two decades electricity sectors in both developed and developing countries have been subject to restructuring to introduce private capital and increase competition. This has been accompanied by the introduction of new regulatory regimes. Although the effects of such reforms in a number of the developed economies are now well documented, apart from a few case studies, the experience of developing countries is much less well researched. This is important because privatisation, competition and the reform of state regulation are key themes in donor aid programmes, notably of the World Bank. This paper provides an econometric assessment of the effects of privatisation, competition and regulation on the performance of the electricity generation...
Tipo: Working or Discussion Paper
Palavras-chave: Public Economics.
Ano: 2002
URL: http://purl.umn.edu/30593

PROCUREMENT STRATEGIES: IMPACTS OF QUALITY RISKS IN HARD WHEAT
Provedor de dados: 31
Autores: Wilson,   William W.; Dahl,   Bruce L.; Johnson,   D. Demcey.
Development and organization of procurement strategies have escalated in importance with maturity of the food processing industry, as well as with the prospect of greater choice attributable to variety development and information technology.  Conventional alternatives for procurement range from spot purchases with specifications for easily measurable characteristics, to varying forms of strategies with pre-commitment.  In the case of grains these choices are complicated by two factors.  First, there is intrinsic uncertainty associated with end-use qualities that are not easily measurable.  Second, grain prices and therefore procurement costs vary spatially due to competing market regions.  Thus, shifting origins may involve higher cost due to having to bid...
Tipo: Working or Discussion Paper
Palavras-chave: Marketing; Agribusiness.
Ano: 2000
URL: http://purl.umn.edu/23214

REVIEW OF SOME OPERATIONAL PROCEDURES TO INCORPORATE EQUITY OBJECTIVES IN PROJECT APPRAISAL
Provedor de dados: 31
Autores: Jones,   John M.
In recent years there has been a growing interest in the development of methodologies related to the formulation and appraisal of projects.  This is reflected in an increasing number of scientific papers and courses offered at different levels on the subject, most of which are directed for application in less developed countries.  A wide variety of institutions are contributing in different ways to this development.  Resulting from this interest, several operational procedures have been suggested which enable the analyst to perform financial as well as social appraisal of projects, where financial refers specifically to appraisal for the private and/or public participants in the project, and social refers to analysis from the perspective of economy-wide...
Tipo: Thesis or Dissertation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 1979
URL: http://purl.umn.edu/11181

Independent Innovation System of China's Agricultural Products Processing Industry
Provedor de dados: 31
Autores: Ren,   Ailian.
This paper introduces the importance of innovation system for agricultural products processing industry. Based on the principles of openness, dynamics, systematization, outstanding industrial characteristics and close cooperation, a diversified agro-processing innovation system is constructed. It is an innovation subject system of agricultural products processing industry which takes agricultural products processing industry as the core, independent innovation as the center, and university, scientific research institution, government, intermediary organization, financial institution and peasant as the supplements. It is also an innovation operation system of agricultural products processing industry which consists of knowledge innovation, technological...
Tipo: Thesis or Dissertation
Palavras-chave: Agricultural products processing industry; Independent innovation; Innovation system; China; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/54030

Exploring the use of variable bandwidth kernel density estimators
Provedor de dados: 31
Autores: Salgado-Ugarte,   Isaias H.; Perez-Hernandez,   Marco A.
Variable bandwidth kernel density estimators increase the window width at low densities and decrease it where data concentrate. This represents an improvement over the fixed bandwidth kernel density estimators. In this article, we explore the use of one implementation of a variable kernel estimator in conjunction with several rules and procedures for bandwidth selection applied to several real datasets. The considered examples permit us to state that when working with tens or a few hundreds of data observations, least-squares cross-validation bandwidth rarely produces useful estimates; with thousands of observations, this problem can be surpassed. Optimal bandwidth and biased cross-validation (BCV), in general, oversmooth multimodal densities. The...
Tipo: Journal Article
Palavras-chave: Kernel density estimation; Bandwidth; Cross validation; Multimodality test; Research Methods/ Statistical Methods.
Ano: 2003
URL: http://purl.umn.edu/116063

AGRICULTURAL LAND PROTECTION POLICY FOR ALBANIA: LESSONS FROM WESTERN EUROPE, NORTH AMERICA, AND JAPAN
Provedor de dados: 31
Autores: Jacobs,   Harvey M.
This report has been prepared as one effort to assist the Albanian government in formulating a policy approach appropriate to the conditions and culture of their country. The goal of this report is to examine the approach to agricultural land protection in other parts of the world, for the lessons they can provide to Albania. There is little recent literature on the subject of agricultural land protection policies. Most of the articles found in the English-language literature are six to ten years old, and in turn often rely on other sources that are several years older still. Thus, this survey should be viewed as a somewhat dated catalog of policy approaches which have been used at various times in the respective jurisdictions rather than as a statement of...
Tipo: Working or Discussion Paper
Palavras-chave: Land use; Rural--Government policy--Europe Land use; Rural--Government policy--Canada Land use; Rural--Government policy--United States Land use; Rural--Government policy--Japan Land use; Rural--Law and legislation Agriculture and state--Albania Agricultural planning--Albania Land Economics/Use.
Ano: 1997
URL: http://purl.umn.edu/12811

Does Efficient Irrigation Technology Lead to Reduced Groundwater Extraction?: Empirical Evidence
Provedor de dados: 31
Autores: Pfeiffer,   Lisa; Lin,   C.-Y. Cynthia.
Please see the revised, peer reviewed paper:  Lisa Pfeiffer, C.-Y. Cynthia Lin, Does efficient irrigation technology lead to reduced groundwater extraction? Empirical evidence, Journal of Environmental Economics and Management, Available online 23 December 2013, ISSN 0095-0696, http://dx.doi.org/10.1016/j.jeem.2013.12.002. (http://www.sciencedirect.com/science/article/pii/S0095069613001095)
Tipo: Conference Paper or Presentation
Palavras-chave: Irrigation efficiency; Groundwater management; Irrigation technology; Environmental Economics and Policy; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/60927

Catch allocation in a shared fishery with a minimally managed recreational sector
Provedor de dados: 31
Autores: Lindner,   Robert K.; McLeod,   Paul.
A prevalent problem in shared fisheries is competition between commercial and recreational fishers for access to a resource that is subject to increasing utilisation pressure. For most shared fisheries in New Zealand, the commercial sector is efficiently managed with a regime of individual transferable quota (ITQ), but the recreational fishing is only minimally managed. A model is developed that can be used to explore the size of the total allowable catch (TAC) that is both sustainable AND maximises the value to the NZ economy of the combined commercial and recreational catch when the commercial catch is regulated via a total allowable commercial catch (TACC) while the recreational catch (RC) is self regulating. Determinants of the optimal catch allocation...
Tipo: Conference Paper or Presentation
Palavras-chave: Economics management shared fishery catch allocation; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/100579

Fishing Across the Centuries: What Prospects for the Venice Lagoon?
Provedor de dados: 31
Autores: Silvestri,   Silvia; Pellizzato,   M.; Boatto,   V.
Fishing has always been an important activity for those Venetians who live near the Lagoon, and it still enjoys an important economic and social role in the region. Over the last few years, however, the fishing industry has been subject to a profound transformation both in the reduction of the variety and the abundance of the species found in the lagoon, and in the change from a complex and well-structured type of activity to one which has become monospecialist, that is based principally on the fishing of the bivalve Tapes philippinarum (Adam &amp; Reeve). The widespread diffusion of this bivalve and its considerable commercial value have resulted in an increased harvest, initially carried out by hand but now by more sophisticated methods which are capable...
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/12207

MINNESOTA V. MILLE LACS: GATEWAY TO TRIBAL/STATE RESOURCE MANAGEMENT
Provedor de dados: 31
Autores: Gonzalez,   Mark J.
Minnesota v. Mille Lacs Band of Chippewa Indians is the United States Supreme Court's most recent decision to focus on the continued existence of tribal off-reservation hunting, fishing, and gathering rights (usufructuary rights) as guaranteed by 19th century treaties entered into between the Lake Superior Chippewa and the federal government. This paper addresses three issues. First, a fundamental flaw with the Petitioner's position is a misconceptualization of the legal theory that governs Indian treaty interpretation and Indian sovereignty. The Petitioner proceeds on the mistaken premise that the Respondent's usufructuary interests are granted privileges rather than reserved rights. Second, in finding that the Respondents still possessed usufructuary...
Tipo: Working or Discussion Paper
Palavras-chave: Mille Lacs Band of Chippewa Indians -- Treaties Ojibwa Indians -- Legal status; Laws; Etc. -- Minnesota -- Cases Ojibwa Indians -- Minnesota -- Claims Natural resources -- Minnesota -- Mille Lacs Lake Region -- Management Resource /Energy Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/12772

Economic Feasibility of Sustainable High Oilseed-Based Biofuel Production: The Case for Biodiesel in North Carolina
Provedor de dados: 31
Autores: Yeboah,   Anthony K.; Naanwaab,   Cephas B.; Yeboah,   Osei-Agyeman; Owens,   John Paul; Bynum,   Jarvetta S.
We assess the economic feasibility of a 10 MMGY biodiesel plant using a Monte Carlo Cash Flow model programmed in Excel using @Risk, a simulation and risk analysis software.  The model incorporates stochastic components to capture uncertainty in the analysis.  The stochastic components are mainly variables that may exhibit risk, such as input prices, output prices, and expected revenues, and these are assigned probability distributions in the model. The model is programmed with three output variables: stream of revenues,  profits/loss,  and the resulting net present value (NPV) over ten year forecast period.   Results from the cash flow analysis show that average expected revenues from the sale of biodiesel and co-products will be $48.5 million and total...
Tipo: Presentation
Palavras-chave: Economic feasibility; Biodiesel; Monte carlo simulations; Risk analysis; Sensitivity analysis.; Agribusiness; Production Economics; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2012
URL: http://purl.umn.edu/119729

Internal Innovation and Informational Dynamics within Small and Medium Beef Cattle Farm Enterprises
Provedor de dados: 31
Autores: Noble,   Chris.
The internal knowledge capabilities of small and medium beef cattle farm enterprises are examined using information economics to gain an understanding of how these organisations approach innovation. Enterprises are viewed as being embedded in the wider industry and are subject to both external and internal influences. However the discussion here is focused on internal activities in order to consider how enterprise specific knowledge is constructed allowing innovation to occur. Innovation is an incremental and continuous process because of the endogenous origins of the internally developed knowledge used to enact it. Learning theory is incorporated into this analysis to elucidate this connection between production undertaken and the historical shaping of...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2011
URL: http://purl.umn.edu/101227

PEDAGOGIA DA ALTERNÂNCIA E DESENVOLVIMENTO LOCAL
Provedor de dados: 31
Autores: Caliari,   Rogerio Omar; Alencar,   Edgard; Amancio,   Robson.
This work aimed at studying the contributions from the alternative rural educational practices in the process of construction of local development. In this context the study sought to understanding the manifestations of local development expressed in Comunidade do Giral-ES (Giral Community) and its relationship with the incorporation of knowledge by means of rural education. So, the variables related with the pedagogical practices which adopt the Alternance Pedagogy, its role in the building of the local development, its practice in the rural multicultural revalorization and its performance in the transforming performance of the subject as an agent of his own history. For the obtainance of information qualitative research techniques were used, for we see...
Tipo: Journal Article
Palavras-chave: Local development; Alternance pedagogy; Popular participation; Rural education.; Community/Rural/Urban Development.
Ano: 2002
URL: http://purl.umn.edu/45269

Agricultural Research Impact Assessment: The Case of Maize Technology Adoption in Southern Mali
Provedor de dados: 31
Autores: Boughton,   Duncan; Frahan,   Bruno Henry de.
Adoption of the improved maize package was particularly rapid during the period 1980-86 when an attractive guaranteed price was offered and extension activities were reinforced by a maize project that included the establishment of a seed multiplication program. Following cereal market price liberalization in 1986, maize prices fell and have been subject to considerable variability. Area has continued to expand, but farmers have greatly reduced fertilizer use, switched back to maize-late millet intercropping, and substituted early maturing varieties better suited to their own food security needs. The estimated internal rate of return (IRR) to investment in maize research and extension in southern Mali over the period 1969-90 is 135%. This high rate can be...
Tipo: Report
Palavras-chave: Food security; Food policy; Maize; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; Downloads June 2008 - June 2009: 26; R11.
Ano: 1994
URL: http://purl.umn.edu/54729

IMPACT OF AGRICULTURAL BIOTECHNOLOGY IN THE EUROPEAN UNION'S SUGAR INDUSTRY
Provedor de dados: 31
Autores: Demont,   Matty; Tollens,   Eric.
We develop a welfare framework, which explicitly recognizes that research protected by intellectual property rights generates monopoly profits.  The result is a simulation model, shaped to the European sugar sector, and enabling to assess the size and distribution of the benefits of transgenic sugar beet adoption in the European Union (EU) and the Rest of the World (ROW).  Our model results suggest that the ROW captures the largest share of the benefits (53 % of total welfare increase).  The EU sugar industry absorbs the next largest share of the benefits (30 %), with the smallest share (17 %) accruing to seed suppliers and gene developers.  Since EU intervention prices are exogenously fixed each year, EU consumers do not take part in the distribution of...
Tipo: Working or Discussion Paper
Palavras-chave: Industrial Organization; Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/31854

Impact of Foreign Intellectual Property Rights Protection on U.S. Exports and FDI
Provedor de dados: 31
Autores: Gu,   Weishi.
This version of the paper is subject to changes.
Tipo: Conference Paper or Presentation
Palavras-chave: Export; FDI; Technology transfer; Intellectual property rights; GMM; International Development; International Relations/Trade; Research and Development/Tech Change/Emerging Technologies; C33; F21; F23; F14; O34; K33.
Ano: 2009
URL: http://purl.umn.edu/49414

POSIBILIDADES Y RESTRICCIONES PARA LA EXPORTACIÓN DE MELÓN CANTALOUPE PRODUCIDO EN EL MUNICIPIO DE MAPIMÍ, DGO., MÉXICO AL MERCADO DE LOS ESTADOS UNIDOS
Provedor de dados: 31
Autores: Espinoza Arellano,   Jose de Jesus; Lozada Cota,   Michelle; Leyva Najera,   Saul.
The general objective of this work was to analyze the state of technology, inocuity and commercialization of cantaloupe melon of private farmers in Mapimí, Dgo. County, Mexico, to identify opportunities and constraints to export melon of Mapimí to the United States market. To gather information on technology, safety and marketing, was designed and implemented a survey of major producers in the Mapimí County, which by their production volumes have greater export potential. In general it was found that private farmers of Mapimí have a good technological level emphasizing the use of hybrid seeds, plastic mulch, drip tape and pollinating bees. In the case of inocuity producers have an idea of the subject of Good Agricultural Practices (GAP) and Good...
Tipo: Journal Article
Palavras-chave: Cantaloupe melon; Exports; Inocuity; GAP; GMP.; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/99475

Where is Farm Management Going?
Provedor de dados: 31
Autores: Kemp,   David R.; Girdwood,   John; Parton,   Kevin A.; Charry,   Al A.
Farms and farming are major contributors to the world economy, directly responsible for a large part of GDP. These achievements are not trivial and imply that farms are being managed in reasonably effective ways, else agricultural industries would not be sustained. However the study of Farm Management within Australia has been limited over recent decades. Is it contributing to better farm management or merely cataloguing what has happened? Is it leading or following? During that time there has been an increasing interest in managing farms more sustainably, with emphasis in issues beyond short-term profitability to encompassing rural communities, ecosystems, biodiversity, ethics of technology and politics. The complexity of management has increased. This...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2003
URL: http://purl.umn.edu/24351

TECHNICAL PROGRESS IN THE SETE TRAWL FISHERY, 1985-1999
Provedor de dados: 31
Autores: Kirkley,   James E.; Morrison Paul,   Catherine J.; Cunningham,   Stephen; Catanzano,   Joseph.
Fisheries throughout the world have long been subject to overfishing and excess capacity, which has generated substantial and increasing concern about biological and economic performance ramifications. These problems in part stem from substantial investment in technical improvements to boats and equipment in fishing fleets. Such technical change exacerbates the extent of excess fishing capacity, as well as low returns to fishing effort and investment due to catch limitations from both regulatory constraints and overfished stocks. However, economists have not yet attempted to quantify the extent or effects of technical change in fisheries. In this paper we use detailed data on innovation patterns for 19 vessels in the Sete trawl fleet of Southern France to...
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/11980

Efeitos da imposição de barreiras técnicas e fitossanitárias nas exportações brasileiras de mamão
Provedor de dados: 31
Autores: Faria,   Rosane Nunes de; Lirio,   Viviani Silva; Silva,   Orlando Monteiro da; Lima,   Joao Eustaquio de.
The main objective of this paper was to identify technical and sanitary requirements that could be qualified as export barriers for the Brazilian papaya and to quantify their effects on the volume exported to the United States of America. The methodology consisted of both qualitative and quantitative analysis. Qualitative information collected by means of interviews with producers and exporters were analyzed with the use of frequencies and descriptive statistics. A time series model of transfer function was estimated to analyze the impact of technical and sanitary barriers upon Brazilian papaya exports. Through the qualitative analysis it was possible to identify five technical and sanitary requirements that could be qualified as export barriers. Due to...
Tipo: Journal Article
Palavras-chave: Technical barriers; Sanitary requirements; Papaya; Transfer function model; International Relations/Trade.
Ano: 2005
URL: http://purl.umn.edu/56735

THE ROLE OF RESORT PLANNING IN SUSTAINING TOURIST DESTINATION IMAGE
Provedor de dados: 31
Autores: Ozdemir,   Gocke.
The environmental quality is recognized to be an important factor while making decisions upon the destination to visit. The image of the resort will likely to be more realistic but also complex after the tourists’ visit. The complex image of the resort, where the tourist has about after visiting it, is crucial for creating loyalty and also word of mouth advertising. Therefore, if the tourists visiting the resort are to complain then the intermediaries will likely to reduce the tourism activities through that resort or the tourism activities will turn into a more hotel facility based activity. Resort planning is a continous process and defines the systemized and controlled development of the resort.  Resort planning can be implemented in an actual resort or...
Tipo: Journal Article
Palavras-chave: Tourism; Planning; Destination; Resort; Image; Agribusiness; Community/Rural/Urban Development.
Ano: 2007
URL: http://purl.umn.edu/58931

Regulatory Tailoring, Reliability, and Price Volatility with Stochastic Breakdowns
Provedor de dados: 31
Autores: Gruenspecht,   Howard K.
Although real-world energy supply systems are subject to stochastic failures, the impacts of proposed regulations affecting these systems have typically been evaluated using non-stochastic models. This paper develops an energy market model that explicitly allows for stochastic failures and demonstrates they play an important, or even dominant, role in determining the market impacts of environmental regulations that tailor product specifications to address local or regional conditions, such as fuel-formulation requirements specific to certain regional markets within the United States. While traditional non-stochastic analyses view the tailoring of regulatory requirements by location as an efficiency-enhancing alternative to a -one size fits all- regulatory...
Tipo: Working or Discussion Paper
Palavras-chave: Reliability; Boutique fuels; Gasoline price spikes; Stochastic failures; Environmental regulation; Tailored regulation; Demand and Price Analysis; Q2; Q4.
Ano: 2002
URL: http://purl.umn.edu/10781

Analysis on Financing Status of Infrastructure in Agricultural High-tech Demonstration Zone of Yangling City and Application of PPP Mode
Provedor de dados: 31
Autores: Jian-ling,   L.V.; Chao,   G.E.
Financing mode of municipal public utilities in agricultural High-tech Demonstration Zone of Yangling City was mainly divided into five kinds, including financial financing mode, debt financing mode, enterprise accumulation mode, business resources mode, foreign direct investment and private capital financing mode. Due to the single investment subject, narrow financing channel, monopoly management and ineffectiveness of capital utilization in infrastructure financing, PPP mode based on the co-operative financing of public sector and private enterprises was put forward. The financing applications of PPP mode in Yangling Demonstration Zone were discussed either. However, attentions should be paid to establish a benign partnership between government and...
Tipo: Thesis or Dissertation
Palavras-chave: Infrastructure; PPP mode; Yangling Demonstration Zone; China; Agricultural Finance; Financial Economics; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/53774

Food production, distribution and culture: public views, interests and concerns
Provedor de dados: 31
Autores: Kupiec-Teahan,   Beata; Leat,   Philip M.K.; Revoredo-Giha,   Cesar.
A basic right of both a consumer and a citizen is the right to be heard, and their voiced concerns have to be taken into account when developing policies and obtaining trust for government actions. Therefore this study focuses on consumers’ interests, opinions and expectations which are identified and categorised according to subject area, degree of involvement and political agenda of a consumer. The paper draws on the responses of individual members of the public in the National Food Policy discussion initiated by the Scottish Government in 2008. Altogether 246 responses were subjected to quantitative analysis of texts, supported by text mining. A variety of interests and opinions underpinning the political agendas of individuals responding to the...
Tipo: Working or Discussion Paper
Palavras-chave: Food Policy; Scotland; Text analysis; Consumer research; Food Consumption/Nutrition/Food Safety.
Ano: 2009
URL: http://purl.umn.edu/109391

PROCESSED FOOD TRADE AND FOREIGN DIRECT INVESTMENT UNDER NAFTA
Provedor de dados: 31
Autores: Koo,   Won W.; Mattson,   Jeremy W.
Trade in processed food products is rapidly growing.  Trade with Canada and Mexico has especially been growing since free trade agreements have been implemented.  The U.S. presence in the processed food industry in other countries through foreign direct investment (FDI) is also large and has been expanding.  The relationship between trade and FDI is uncertain and subject to much debate.  Japan and Canada are the largest importers of processed foods from the United States, followed by Mexico and Korea.  Canada is the leading exporter of food products to the United States, followed by France, Mexico, and Italy.  Canada and Mexico have, in recent years, become increasingly important trading partners in processed foods.  Results from this study do not...
Tipo: Working or Discussion Paper
Palavras-chave: Trade; Processed foods; Foreign direct investment; Canada; Mexico; International Relations/Trade.
Ano: 2002
URL: http://purl.umn.edu/23566

BIENNIUM REPORT ON THE COTTON ECONOMICS RESEARCH LINE-ITEM, 1997/98 - 1998/99
Provedor de dados: 31
Funding for the Cotton Economics Research Special Item from the Texas legislature became effective on September 1, 1995, and by the end of 1998/99 fiscal year, the Cotton Economic Research Special-Item has been funded at $133,478 per year for four years.  The first biennium (1995/96 – 1996/97) report was produced in September, 1997 (Report No. CER-97-16).  This report summarizes the activities and accomplishments in Cotton Economics Research, which is conducted within the Cotton Economics Research Institute at Texas Tech University, during the 1997/98 – 1998/99 biennium.  Of the $266,956 funding for the last biennium, $142,547 (53%) was allocated for student assistantships, $80, 686 (30%) for faculty salaries, and $45,723 (17%) for maintenance and...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/31255

Amenity benefits and public policy: An application to the Georgia Pecan Industry
Provedor de dados: 31
Autores: Sande,   Doris N.; Mullen,   Jeffrey D.; Nzaku,   Kilungu.
Most agricultural production results in both marketable and non-marketable products. Most policy decisions however, tend to be made based only on the market value, which ignores the non-marketable value or amenity benefits. One type of amenity benefits is farmland amenities which are attributes of farmland that are uniquely provided by actively farmed land. Examples include the scenic beauty of rolling pasture, orchards and the cultural value of farming as a way of life. Farmland also produces non-farm amenities, such as open space, wildlife habitats, and groundwater recharge. Most amenity benefits are classified as public goods in that they are non-excludable and non-rival in terms of use. Thus, most amenities do not have a market value associated with...
Tipo: Conference Paper or Presentation
Palavras-chave: Amenity Benefits; Pecans; Supply; Public policy; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/46851

Combining risk perception and risk attitude: A comprehensive individual risk behavior model
Provedor de dados: 31
Autores: van Winsen,   Frankwin; Wauters,   Erwin; Lauwers,   Ludwig H.; de Mey,   Yann; Van Passel,   Steven; Vancauteren,   Mark.
Although risk management in farming is a well-documented subject in scientific literature, this same literature is usually used only by other scientist and is not aiding individual farmers in their management. Risk perception and risk attitude are well described determinants of risk behaviour but rarely combined in an integrated approach for risk behaviour research. Furthermore in most literature risk attitude is taken as a given stable personality trait on which the optimal behaviour should be based. We argue that risk attitude can be manageable in order to derive optimal risk behaviour. Based on these findings we develop a comprehensive theoretical basic model on farmers risk behaviour. Furthermore a participatory approach involving the stakeholder, the...
Tipo: Conference Paper or Presentation
Palavras-chave: Risk management; Risk perception; Risk attitude; Risk behaviour; Risk and Uncertainty.
Ano: 2011
URL: http://purl.umn.edu/115749

Globalization of food and agriculture and the poor
Provedor de dados: 31
Autores: von Braun,   Joachim; Diaz-Bonilla,   Eugenio.
The economic impact of globalization, particularly on poverty, and the changes in agri-food markets have received much attention in recent years. However, the intersection of these two trends has been neglected. The present volume fills this gap by focusing on the way globalization of agri-food systems affects the world’s poor and its impact on food and nutrition security in developing countries. Rather than offering a single policy prescription or simplistic messages about globalization being 'good' or 'bad', the book acknowledges the complexity of the subject by including a variety of policy and research perspectives. The contributors analyse in details the links between poverty and globalization. They examine the different interactions between the...
Tipo: Report
Palavras-chave: Food supply; Developing countries; Rural poor Globalization; Food Security and Poverty.
Ano: 2008
URL: http://purl.umn.edu/46012

AN INSTITUTIONAL ECONOMIC APPRAISAL OF WORKER EQUITY SCHEMES IN AGRICULTURE:
Provedor de dados: 31
Autores: Karaan,   Mohammad.
The institutional economic appraisal conducted in this paper confirms that equity schemes are subject to institutional incompleteness as proposed in ICT. The incompleteness stem from the lack of verifiability related to social capital, embeddedness, governance and micro performance. In addition, they lack the requisite ex ante incentives to enable ex post adaptation, counterveilance over opportunism, and the distribution of residual claims and control. The first reason for incompleteness emanate from the motivations of the initiators, which is opportunism by landowners to secure their assets in the face of uncertainty and/or enhance their returns in the marketplace. The lack of worker effort and options in the early stages raises credible commitment...
Tipo: Conference Paper or Presentation
Palavras-chave: Labor and Human Capital.
Ano: 2003
URL: http://purl.umn.edu/19094

WATER ALLOCATION POLICIES FOR THE DONG NAI RIVER BASIN IN VIETNAM: AN INTEGRATED PERSPECTIVE
Provedor de dados: 31
Autores: Ringler,   Claudia; Vu Huy,   Nguyen.
Recent water sector reforms, increased scarcity and vulnerability of existing water resources, combined with declining public funding available for large-scale infrastructure investment in the sector have led to an increased awareness by the Government of Vietnam for the need to analyze water resource allocation and use in an integrated fashion, at the basin scale, and from an economic efficiency perspective. This paper presents the development, application, and results from an integrated economic-hydrologic river basin model for the Dong Nai River Basin in southern Vietnam that attempts to address these issues. The model framework takes into account the sectoral structure of water users (agriculture, industry, hydropower, households, and the environment),...
Tipo: Working or Discussion Paper
Palavras-chave: River basin model; Water allocation policy; Integrated assessment; Vietnam; Dong Nai basin; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/60325

THE DETERMINANTS OF TIME SPENT ON SOCIAL, COMMUNITY AND LEISURE ACTIVITIES BY FARM HOUSEHOLDS IN THE WEST OF IRELAND
Provedor de dados: 31
Autores: Keogh,   Sinead; Cullinan,   John.
Understanding the determinants of farm households’ social engagement patterns in rural communities is important for public policy programs that seek to improve the well-being of the rural population and promote rural sustainability. Within this context, this paper examines the factors that influence both the participation in, and the number of hours dedicated to, social, community and leisure activities among farm operators and their spouse/partner in a region in the West of Ireland. The theoretical underpinnings of this research are an extension of Becker’s (1965, 1974) and Gronau’s (1977) agricultural household models, whereby households maximise utility subject to a set of constraints, household income and time endowment. The study employs a time-use...
Tipo: Conference Paper or Presentation
Palavras-chave: Rural sustainability; Agricultural household model; Time use survey; Craggs two-step model.; Community/Rural/Urban Development.
Ano: 2011
URL: http://purl.umn.edu/108798

On the Economic Determinants of Oil Production. Theoretical Analysis and Empirical Evidence for Small Exporting Countries
Provedor de dados: 31
Autores: Cologni,   Alessandro; Manera,   Matteo.
In this paper, decisions regarding production in oil exporting countries are studied by means of theoretical analysis and empirical investigation. Under the assumptions of exogenous oil prices and world oil demand, we are able to describe the relationship between oil production levels and changes in the conditions in world oil markets. Intertemporal production decisions by a representative oil producer are modelled by means of a partial equilibrium model. In this theoretical model, oil producers are subject to exogenous shocks in world oil demand and prices. Oil companies can change output levels only by incurring a fixed cost. Results from the simulation of this model show a strong relationship between oil production and changes in world oil consumption....
Tipo: Working or Discussion Paper
Palavras-chave: Oil Production; Exogenous Shocks; Theoretical Modelling; Time Series Analysis; Resource /Energy Economics and Policy; C22; D21; D22; Q41.
Ano: 2011
URL: http://purl.umn.edu/115725

RICE POLICIES AND PRIORITIES IN MAURITANIA
Provedor de dados: 31
Autores: Fall,   Oumar.
If there is an economic crisis in Sub-Saharan Africa, as is now generally accepted by the worldwide community, Mauritania falls in the category of most severely affected countries.  The most severe consequence of the crisis has been the death of thousands of people from starvation, in Mauritania and elsewhere.  Domestic policy issues have been singled out by Eicher in his "Africa's Food Crisis" as being at the heart of the problem.  In search of solutions, governments have failed to consider population growth and "agrarian socialism" as possible sources of their problem.  Based on the conclusions of most reports, the governments' search procedure for courses of action might best be described as one of "tatonnement,' or trial-and-error experimentation.  The...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1983
URL: http://purl.umn.edu/11257

EU Market Access: The Way Of Licensed Warehousing System for Turkish Food Producers and Exporters
Provedor de dados: 31
Autores: Ulas,   Dilber.
Licensed warehousing system plays a very important role in all transfers of food products from the place of origin to ultimate users in developed countries. Public warehouses, operated as an independent business offering a range of services, such as storage, handling and transportation. “Licensed Warehousing Law”, was accepted on 10.02.2005 and this is a new subject  in Turkey. In this research, the licensed warehousing system in Turkey is evaluated from the point of view of industrial and agriculture officials. Confidential face to face interviews were held with the authorities of Industry and Trade Ministry in Ankara. The very new licensed warehousing law connote many questions. Who will be getting the benefits of qualified storing, small-sized...
Tipo: Conference Paper or Presentation
Palavras-chave: Licensed warehousing; Agriculture; Food produce; Food trade; Agribusiness; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/7860

COTTON SECTOR POLICIES AND PERFORMANCE IN SUB-SAHARAN AFRICA:LESSONS BEHIND THE NUMBERS IN MOZAMBIQUE AND ZAMBIA
Provedor de dados: 31
Autores: Boughton,   Duncan; Tschirley,   David L.; Zulu,   Ballard; Ofico,   Afonso Osorio; de Marrule,   Higino Francisco.
Cotton is one of the most important smallholder cash crops in Sub-Saharan Africa (SSA).  How to ensure input supply, credit recovery and competition is a subject of intense policy debate.  This paper examines the performance of cotton sector development policies in Mozambique and Zambia.  Both countries face the challenge of organizing input supply to farmers in the absence of rural credit markets, and competing in international markets distorted by production subsidies in developed countries.  Both countries privatized cotton ginning in the 1990s.  Emerging from civil war, Mozambique established geographical monopolies to interlink input and output markets and facilitate credit recovery.  In Zambia, the government completely liberalized the cotton sector,...
Tipo: Conference Paper or Presentation
Palavras-chave: Cotton; Mozambique; Zambia; Liberalization; Agricultural policy; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/25855

PROCUREMENT STRATEGIES TO MEET FUNCTIONAL REQUIREMENTS IN WHEAT SHIPMENTS
Provedor de dados: 31
Autores: Wilson,   William W.; Peterson,   Del A.; Dahl,   Bruce L.
Consistency of functional characteristics in wheat is a concern confronting buyers and sellers.  This research analyzes the cost and risk of different procurement strategies for importers.  A stochastic simulation model is used to determine the probability of a functional characteristic being satisfied subject to quality targets.  Joint probabilities of meeting specifications and costs were determined for alternative functional characteristics.  Results indicate that, as more specific characteristics are incorporated into a contract, the probabilities of meeting end-use requirements increase.  Specific characteristics come with a higher cost, due to increased testing costs related to identity preservation.  The results are summarized as cost/risk tradeoffs...
Tipo: Working or Discussion Paper
Palavras-chave: Buying strategies; Location; Variety; Functional characteristic tests; Costs; Risks; Crop Production/Industries; International Relations/Trade.
Ano: 2004
URL: http://purl.umn.edu/23509

Generic Advertising Wearout
Provedor de dados: 31
Autores: Kinnucan,   Henry W.; Chang,   Hui-Shung (Christie); Venkateswaran,   Meenakshi.
Advertising wearout, defined as the declining effectiveness of a commercial or campaign associated with increased exposure, is examined from a generic advertising perspective. Generic advertising campaigns of the type typically undertaken by agricultural commodity groups differ from branded advertising in that the former seek to increase aggregate demand for a product category (e.g., beef, milk, wool) rather than the market share of a particular brand within a category. A major hypothesis addressed in this research is whether generic campaigns are subject to the same generation-satiation-decay cycles found for the more typical brand advertising campaigns. The hypothesis is examined by estimating a time-varying parameter model using data from the first...
Tipo: Journal Article
Palavras-chave: Marketing.
Ano: 1993
URL: http://purl.umn.edu/9620

THE POTENTIAL IMPACT OF ICE-MINUS BACTERIA AS A FROST PROTECTANT IN NEW YORK TREE FRUIT PRODUCTION
Provedor de dados: 31
Autores: Love,   John M.; Lesser,   William H.
Ice-nucleating bacteria, which are known to occur naturally on many crops and have been associated with frost damage, may be subject to control with genetically engineered bacteria, dubbed "ice-minus" bacteria.  Ice-minus technology is designed to depress the critical temperature at which frost damage begins by displacing the natural population of ice-nucleating organisms.  A trial product has been tested in the field with strawberries.  Although tests with bacteriacidal compounds have suggested other mechanisms for controlling the critical temperature in deciduous fruit crops, ice-minus may prove to be effective.  This analysis examines the possibility of ice-minus being adopted by New York tree-fruit growers and the likelihood of it causing a major...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1989
URL: http://purl.umn.edu/28801

Adoption of Soil Conservation Practices in Olive Groves: The Case of Spanish Mountainous Areas
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Franco,   Juan Agustin; Gonzalez-Roa,   Maria del Carmen.
This paper presents some results from a survey carried out in 2004 among 223 olive tree farmers from mountainous areas in the Spanish Southern provinces of Granada and Jaen regarding the adoption of soil conservation and management practices. Olive tree groves in mountainous areas are subject to a high risk of soil erosion and have to incur in higher costs of soil conservation. This results in greater difficulties to comply with cross-compliance and to benefit from agri-environmental schemes. Our main objectives are to analyse the current level of adoption of soil conservation practices and to analyse which socio-economic and institutional factors determine such adoption. Three Probit models are estimated. Dependant variables are three different soil...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive groves; Soil conservation; Technology adoption; Resource /Energy Economics and Policy; Q12; Q24.
Ano: 2005
URL: http://purl.umn.edu/24661

Linking biodiversity, land-use and incomes at the farm level: an interdisciplinary modelling approach
Provedor de dados: 31
Autores: Acs,   Szvetlana; Dallimer,   Martin; Hanley,   Nick; Gaston,   Kevin J.; Armsworth,   Paul R.
Recent decades have witnessed substantial losses in biodiversity in Europe, partly driven by the ecological changes associated with intensification of agricultural production. These changes have particularly affected biodiversity in marginal areas, such as the uplands in UK, since habitat change has been greater than in lowland zones. Livestock farming is the main land use in these areas, and economic viability of farmers substantially relies on income coming from agricultural subsidies and agrienvironmental payments. The production decisions have an effect on biodiversity, although the precise links are subject of much debate. To assess the effects of policy changes on farm incomes and biodiversity, we developed ecological-economic models for three...
Tipo: Conference Paper or Presentation
Palavras-chave: Decoupling; Agri-environmental policy; Ecological-economic model; Biodiversity; Land Economics/Use.
Ano: 2009
URL: http://purl.umn.edu/51056

Recent Trends in Agricultural Land Prices in South Africa: A Preliminary Investigation Using Cointegration Analysis
Provedor de dados: 31
Autores: Obi,   Ajuruchukwu; van Schalkwyk,   Herman D.
The main objective of this paper is to report preliminary findings on the recent trends in agricultural land prices in South Africa against the backdrop of growing concerns over their rising levels. Given the important role of land prices, the impact such increases would have on significant national development efforts, including the on-going land reform programme and other aspects of agricultural restructuring, provide strong justification for this investigation. The cointegration approach was employed within a framework that allowed for both long-run and short-run dynamics of the relationships to be identified. Building on previous structural modelling of farmland prices in the country, and using much expanded time series spanning forty-nine years, it...
Tipo: Conference Paper or Presentation
Palavras-chave: Land Economics/Use; C22; E3; Q15; Q18; Q24.
Ano: 2006
URL: http://purl.umn.edu/25234

Managing Labor on Dairy Farms: A Resource-Based Perspective with Evidence from Case Studies
Provedor de dados: 31
Autores: Mugera,   Amin W.; Bitsch,   Vera.
Labor management practices in agriculture are a marginally and fragmentally researched subject with limited theoretical background in agricultural economics. The resource-based theory is proposed as a framework to analyze labor management on farms and its application discussed with evidence of six case studies. In-depth interviews with farm managers, supervisors, and non-supervisory employees provide data to illustrate the provisions of the resource-based theory. The theory requires heterogeneity, immobility, value, rareness, inimitability, and non-substitutability for resources to contribute to sustained competitive advantage. The human resource system of the case farms satisfies these conditions and hence qualifies as a source of competitive advantage....
Tipo: Journal Article
Palavras-chave: Human resource management; Resource-based theory; Sustained competitive advantage; Dairy farms; Hired farm workers; Labor and Human Capital; Livestock Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/8140

Large-Scale Modelling of Global Food Security and Adaptation under Crop Yield Uncertainty
Provedor de dados: 31
Autores: Fuss,   Sabine; Havlik,   Petr; Szolgayova,   Jana; Schmid,   Erwin; Obersteiner,   Michael.
Concerns about future food security in the face of volatile and potentially lower yields due to climate change have been at the heart of recent discussions on adaptation strategies in the agricultural sector. While there are a variety of studies trying to quantify the impact of climate change on yields, some of that literature also acknowledges the fact that these estimates are subject to substantial uncertainty. The question arises how such uncertainty will affect decision-making if ensuring food security is an explicit objective. Also, it will be important to establish, which options for adaptation are most promising in the face of volatile yields. The analysis is carried out using a stochastic version of the Global Biosphere Management Model (GLOBIOM)...
Tipo: Conference Paper or Presentation
Palavras-chave: Food security; Food price volatility; Optimization under uncertainty; Adaptation; Land use change; Crop Production/Industries; Food Security and Poverty.
Ano: 2011
URL: http://purl.umn.edu/114347

VIABILIDADE FINANCEIRA E RISCOS ASSOCIADOS À INTEGRAÇÃO LAVOURA-PECUÁRIA NO ESTADO DO PARANÁ
Provedor de dados: 31
Autores: Lazzarotto,   Joelsio Jose; Santos,   Maurinho Luiz dos; Lima,   Joao Eustaquio de.
The Brazilian agricultural sector is characterized by a great diversity of production systems subject to a wide number of risk factors. These risks cannot be completely eliminated, but they can be minimized by the adoption of some strategies, such as diversification of agricultural and livestock activities. In this light, a comparative analysis, under operational and market risk conditions, of the financial viability of integrated crop-livestock systems, in relation to systems characterized by grain exploitation or specialized in livestock (beef cattle), was done. The methodology included data on farming in Paraná state, especially the in area of Guarapuava. Long term financial indicators were generated: net present value, internal return rate and...
Tipo: Journal Article
Palavras-chave: Farming system; Financial indicators; Probabilities; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2010
URL: http://purl.umn.edu/93585

Modeling Site Specific Heterogeneity in an On-Site Stratified Random Sample of Recreational Demand
Provedor de dados: 31
Autores: Sardana,   Kavita; Bergstrom,   John C.
Using estimation of demand for the George Washington/Jefferson National Forest as a case study, it is shown that in a stratified/clustered on-site sample, latent heterogeneity needs to be accounted for twice: first to account for dispersion in the data caused by unobservability of the process that results in low and high frequency visitors in the population, and second to capture unobservable heterogeneity among individuals surveyed at different sites according to a stratified random sample (site specific effects). It is shown that both of the parameters capturing latent heterogeneity are statistically significant. It is therefore claimed in this paper, that the model accounting for site-specific effects is superior to the model without such effects....
Tipo: Conference Paper or Presentation
Palavras-chave: Recreational Demand models; Clustering; Subject-specific effects; Truncated Stratified Negative Binomial Model; Overdispersion; Environmental Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/103868

INCENTIVE CONTRACTS TO MEET FUNCTIONAL CHARACTERISTICS IN WHEAT PURCHASING
Provedor de dados: 31
Autores: Wilson,   William W.; Maxwell,   Brett J.; Dahl,   Bruce L.
Consistency of functional characteristics in hard red spring (HRS) wheat is a concern confronting sellers and buyers.  This research analyzes contract incentives for importers with respect to cost and potential risk of acceptance.  A principal-agent framework is utilized to examine contract incentives.  In the principal-agent contract, the principal offers the contract, the agent rejects or accepts the contract, and then decides how much effort to apply.  All this is subject to risk for the agent and moral hazard for the principal.  An example is presented, for which equilibrium contract terms are a base price of 454 cents per bushel for low quality wheat and a premium of 36 cents per bushel if high quality is achieved.  The premium for high quality is...
Tipo: Working or Discussion Paper
Palavras-chave: Incentive Contact; Functional Characteristic; Wheat; Principal-Agent; Crop Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/23617

An analysis of trade related international regulations of genetically modified food and their effects on developing countries
Provedor de dados: 31
Autores: Gruere,   Guillaume P.
This paper reviews current trade-related regulations of genetically modified (GM) food and discusses their effects on developing countries. There is a large heterogeneity in current import approval and marketing policies of GM food worldwide. At the international level, the harmonization efforts are led by the Codex Alimentarius Commission, the Cartagena Protocol on Biosafety and the World Trade Organization. While internationally harmonized guidelines for safety approval have been finalized, we show that there is no clear consensus on labeling regulations for GM food, and there is an increasing risk of conflicts among international agreements. We analyze the GM food regulations of two large rich importers, Japan and the European Union (EU) and discuss...
Tipo: Report
Palavras-chave: Genetically modified food; Developing countries; Biotechnology; Biosafety; Trade regulation; Labeling; International trade; Tariff; International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/55422

What Price for the Right to Go a-Droving? A Derived Demand Approach
Provedor de dados: 31
Autores: Marshall,   Graham R.; Cacho,   Oscar J.; John,   Fatmata.
Travelling stock reserves (TSRs) were established in Australia as a way of allowing the passage of livestock through settled lands to facilitate stocking of new lands. Subsequently, they remained important as a way of moving livestock from property to property or from property to market. Today, the area of land dedicated to TSRs in NSW is estimated at 2.3 million hectares, which are used more as a source of feed than as a livestock thoroughfare. The value of TSRs as a source of feed is particularly important during drought periods, and pricing of access for walking stock has become a subject of contention within the Rural Land Protection Boards (RLPB). The price of TSR permits for walking stock is considerably lower than for agistment, thereby compromising...
Tipo: Working or Discussion Paper
Palavras-chave: Travelling stock reserves; Derived demand; Grazing; Linear programming; Demand and Price Analysis; Livestock Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/12917

Cursed by Too Much Water in a Dry Place: Implications of Dryland Salinity for Farm Management, Policy and Research in Australia
Provedor de dados: 31
Autores: Pannell,   David J.; Ewing,   Michael A.; Ridley,   Anna M.
Dryland salinity is one of the most prominent and intractable problems facing farm managers in the extensive non-irrigated farming systems of southern Australia. The issue was ignored by policy makers until late in the twentieth century, but is now the sole or partial subject of government programs with budgets totaling several billion Australian dollars. Salt occurs naturally at high levels in the subsoils of most Australian agricultural land. As a result of clearing native vegetation, groundwater tables have risen, mobilising the salt and causing adverse impacts to farmland, infrastructure, water resources, and biodiversity. The main action required to prevent groundwater tables from rising is establishment of perennial plants, either herbaceous...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/24310

Productivity Change in the Australian Sheep Industry Revisited
Provedor de dados: 31
Autores: Villano,   Renato A.; Fleming,   Euan M.; Farrell,   Terence C.; Fleming,   Pauline.
Recent low estimates of total factor productivity change for wool producers in the Australian sheep industry indicate that they are struggling to improve their performance. This evidence is at odds with the views of many technical observers of industry performance, prompting us to re-estimate total factor productivity change for farmers in a benchmarking group in south-west Victoria who had been the subject of such a negative finding. An important transformation in sheep production in Australia in recent decades has been a change in enterprise mix, notably a greater presence of prime lamb production. This change complicates the process of computing efficiency and productivity change. We demonstrate that a multi-input multi-output approach, based on the use...
Tipo: Conference Paper or Presentation
Palavras-chave: Sheep; Stochastic output distance function; Technical change; Total factor productivity; Livestock Production/Industries; Productivity Analysis; C23; O3; Q12; Q16.
Ano: 2006
URL: http://purl.umn.edu/25593

PREVISÃO DE PREÇO FUTURO DO BOI GORDO NA BM&amp;F: UMA COMPARAÇÃO ENTRE MODELOS DE SÉRIES TEMPORAIS E REDES NEURAIS
Provedor de dados: 31
Autores: Gaio,   Luiz Eduardo; Castro Junior,   Luiz Gonzaga de; Oliveira,   Andre Ribeiro de.
Human forecasting capacity is still very limited. In spite of the extreme efforts of specialists in several different areas for years developing scientific knowledge, forecasting various events, such as climatic conditions at a given time, the evolution of a commodity price in the future, remain subject liable to a considerably high degree of error. Therefore, this paper aims to compare forecast price models for the Live Cattle market at Brazilian Mercantile and Future Exchange (BM&amp;F) using models based in Neural Networks and statistical tools of heteroscedastic times series. The data used correspond to the closing of the live cattle prices, in the period ranging from August 1997 to May 2005, totalizing 1946 observations. The results show the supremacy...
Tipo: Journal Article
Palavras-chave: Price forecast; Future market; Neural networks.
Ano: 2007
URL: http://purl.umn.edu/43723

Sharing the Burden of Adaptation Financing: An Assessment of the Contributions of Countries
Provedor de dados: 31
Autores: Dellink,   Rob B.; den Elzen,   Michel; Aiking,   Harry; Bergsma,   Emmy; Berkhout,   Frans; Dekker,   Thijs; Gupta,   Joyeeta.
Climate change may cause most harm to countries that contribute least to greenhouse gas emissions. This paper identifies deontology, solidarity and consequentialism as the principles that can serve as a basis for a fair international burden sharing scheme of adaptation costs. We translate these principles into criteria that can be applied in assigning contributions of individual countries, namely historical responsibility, equality and capacity to pay. Specific political and scientific choices are discussed, highlighting implications for international burden-sharing. Combining historical responsibility and capacity to pay seems a promising starting point for international negotiations on the design of burden-sharing schemes. From the numerical assessment,...
Tipo: Working or Discussion Paper
Palavras-chave: Adaptation Financing; Burden-Sharing; Historical Responsibility; Environmental Economics and Policy; F55; Q54.
Ano: 2009
URL: http://purl.umn.edu/52547

Prioritising investment to enhance biodiversity in an agricultural landscape
Provedor de dados: 31
Autores: Polyakov,   Maksym; Pannell,   David J.; Rowles,   Alexei; Park,   Geoff; Roberts,   Anna M.
The removal, alteration and fragmentation of habitat are key threats to the biodiversity of terrestrial ecosystems. Investment to protect biodiversity assets (e.g. restoration of native vegetation) in dominantly agricultural landscapes usually results in a loss of agricultural production. This can be a significant cost that is often overlooked or poorly addressed in analyses to prioritise such investments. Accounting for this trade-off is important for more successful, realistically feasible and cost-effective biodiversity conservation. We developed a spatially explicit bio-economic optimisation model that simulates the effect of conservation effort on the diversity of woodland-dependent birds in the Avoca catchment (330 thousand ha) in North-Central...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/59152

Preferences Erosion and Trade Costs in the Sugar Market: The Impact of the Everything but Arms Initiative and the Reform of the EU Policy
Provedor de dados: 31
Autores: Conforti,   Piero; Rapsomanikis,   George.
The changes recently introduced in the EU Common Market Organization for sugar will interact with preferential imports from developing countries and least developed countries that enjoy preferential treatment for exports to the EU, as well as by trade and adjustment costs. This paper focuses on the impact of the EU Commission’s sugar policy reform and the Everything But Arms initiative on the African, Caribbean and Pacific countries and the Least Developed Countries. Simulations are run with an empirical model structure comprising a partial equilibrium model for the world sugar market and a gravity model to replicate least developed countries bilateral trade with Europe. Particularly, the gravity approach is employed to model the abolition of import...
Tipo: Conference Paper or Presentation
Palavras-chave: EBA; Sugar; Gravity; Trade; C53; International Relations/Trade; Q18; C23.
Ano: 2006
URL: http://purl.umn.edu/25641

KNOWLEDGE PRODUCTION, MULTIFUNCTIONALITY OF AGRICULTURE AND PUBLIC DECISIONS: CRITICAL ISSUES OF CONTEMPORARY CONTROVERSIES
Provedor de dados: 31
Autores: Laurent,   Catherine E.; Labarthe,   Pierre; Berriet-Solliec,   Marielle; Trouve,   Aurelie; Kirsch,   Marc.
Various theoretical models of public policy analysis are used to treat situations of decision-making in which public deciders have to take into account the multifunctionality of agriculture. For some, science-society relations are not really problematical. Others acknowledge the current attempts of these policy-makers to find adequate scientific knowledge, and the difficulties they encounter. These difficulties stem partly from the very content of knowledge produced by research. Could other modes of production be more efficient? The status of the knowledge produced by these approaches is a subject of debate. Bridging the divide between science and policy more effectively is not only a question of knowledge brokerage. Accessibility and reliability of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Multifunctionality; Agriculture; Knowledge; Policy; Agribusiness; Community/Rural/Urban Development; Labor and Human Capital.
Ano: 2009
URL: http://purl.umn.edu/57479

Utility-derived Supply Function of Sheep Milk: The Case of Etoloakarnania, Greece
Provedor de dados: 31
Autores: Stelios,   Rozakis; Alexandra,   Sintori; Konstantinos,   Tsiboukas.
Sheep farming is an important agricultural activity in Greece, since it contributes highly in the country’s gross agricultural production value. Recently, sheep milk production received further attention because of the increased demand for feta cheese and also because of the excessive price level suffered by the consumers, in contrast with the prices paid at the farm level. In this study, we suggest the use of multicriteria analysis to estimate the supply response of sheep milk to price. The study focuses in the Prefecture of Etoloakarnania, located in Western Greece, where sheep farming is a common and traditional activity. A non-interactive technique is used to elicit farmers’ individual utility functions which are then optimized parametrically subject...
Tipo: Conference Paper or Presentation
Palavras-chave: Sheep-farming; Multi-criteria; Utility function; Milk supply; Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/58126

Can Dispersed Biomass Processing Protect the Environment and Cover the Bottom Line for Biofuel?
Provedor de dados: 31
Autores: Egbendewe-Mondzozo,   Aklesso; Swinton,   Scott M.; Bals,   Bryan D.; Dale,   Bruce E.
This paper compares environmental and profitability outcomes for a centralized biorefinery for cellulosic ethanol that does all processing versus a biorefinery linked to a decentralized array of local depots that pretreat biomass into concentrated briquettes.  The analysis uses a spatial bioeconomic model that maximizes predicted profit from crop and energy products, subject to the requirement that the biorefinery must be operated at full capacity.  The model draws upon biophysical crop input-output coefficients simulated with the EPIC model, as well as input and output prices, spatial transportation costs, ethanol yields from biomass, and biorefinery capital and operational costs. The model was applied to 82 cropping systems simulated across 37...
Tipo: Working Paper
Palavras-chave: Biomass production; Bioenergy supply; Cellulosic ethanol; Environmental trade-off analysis; Bioeconomic modeling; EPIC; Spatial configuration; Local biomass processing; Crop Production/Industries; Environmental Economics and Policy; Production Economics; Resource /Energy Economics and Policy; Q16; Q15; Q57; Q18.
Ano: 2011
URL: http://purl.umn.edu/119348

Impact of Land Reform on Productivity, Land Value and Human Capital Investment: Household Level Evidence from West Bengal
Provedor de dados: 31
Autores: Deininger,   Klaus W.; Jin,   Songqing; Yadav,   Vandana.
While land reform has been the subject of considerable scholarly debate, most of the analyses have been at the aggregate level and focused on rather short-term effects. We use a listing of more than 90,000 households in some 200 villages in West Bengal to highlight the impact of the state's 1978 land reform program on human capital accumulation and current productivity of land use. While we ascertain a highly significant positive effect on long-term accumulation of human capital, our analysis also suggests that, partly because land that had been received through land reform is still operated under share tenancy arrangements, productivity on such land is significantly lower than the average. The combination of lower productivity of reform land relative to...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural and Food Policy; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/6277

A crise econômica mundial de 2007 a 2009 e o setor exportador de café no Brasil: análise das perdas
Provedor de dados: 31
Autores: Pereira,   Vanessa da Fonseca; Campos,   Antonio Carvalho; Braga,   Marcelo Jose; Mendonca,   Talles Girardi de.
This study analyzed the Brazilian coffee exporter’s losses between the years 2002 and 2009, by emphasizing the 2007/09 crisis, which affected several sectors and generated instability and uncertainty about the future results of the economic activities. The Brazilian coffee exporting sector is fully inserted in this context, once it acts in the financial markets and it is still subject to the strong variations from the physical market. Thus, the central analysis dealt with the volatility of the exporters returns and was based on auto regressive models with conditional heteroscedaticity (ARCH) and on the Value at Risk (VAR) estimative. As a supplement, the effects from the external demand for the Brazilian coffee and from the exchange rate variation over the...
Tipo: Article
Palavras-chave: Volatility; Coffee; Crisis; Demand and Price Analysis; International Relations/Trade.
Ano: 2011
URL: http://purl.umn.edu/121295

MODELING THE MOTIVATION FOR DIVERSIFICATION ON SUBSISTENCE FARMS IN THE ETHIOPIAN HIGHLANDS
Provedor de dados: 31
Autores: Preckel,   Paul V.; Ahmed,   Mohamed A. M.; Ehui,   Simeon K.
Mathematical programming analysis has been quite effective for commercial farm planning in developed countries, but less so for subsistence farms in developing countries.  In particular, it is difficult to reproduce the level of diversification observed on subsistence farms using a simple profit maximization framework.  This paper proposes an alternative to the minimum consumption requirement approach for modeling subsistence farming households by treating consumption explicitly through a demand system motivated by Cobb-Douglas utility.  A typical, linear programming-based production system is incorporated, allowing for the production of crops and livestock subject to constraints on resource availability.    The approach successfully predicts consumption...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2001
URL: http://purl.umn.edu/20641

Principales determinantes de la productividad total de los factores en el sector agrario espanol
Provedor de dados: 31
Autores: Diaz,   Pilar Exposito; Gonzalez,   Xose Anton Rodriguez.
RESUMEN: En este trabajo se analizan, de forma conjunta y para el periodo 1970-1995,  los factores que a priori deben ser muy relevantes para explicar el comportamiento de la productividad total en el  sector agrario español. En el estudio se utilizan dos procedimientos principales de modelización: lo que podemos considerar como metodología econométrica "tradicional" y la metodología de cointegración. Se acepta la influencia sobre la productividad, coincidiendo con los resultados que se obtienen mayoritariamente en  otros estudios sobre el tema, de variables como el capital humano o los gastos en I+D agrario, pero se resalta adicionalmente  la gran influencia de otras variables como las condiciones climáticas, los cambios en la propia estructura productiva...
Tipo: Journal Article
Palavras-chave: Productivity Analysis; Q10.
Ano: 2001
URL: http://purl.umn.edu/28736

NONPROFIT AND RESIDENT COLLABORATIVES: AN ALTERNATIVE MODEL FOR COMMUNITY PARTICIPATION IN PLANNING?
Provedor de dados: 31
Autores: Pothukuchi,   Kameshwari.
Attempts to encourage and institutionalize citizen participation in planning are fraught with tensions between democratic participation and professional expertise; the reconciliation of local or group interests with larger, citywide interests; process versus outcome; and so on. Who participates, why, on whose terms, how, and with what consequences for themselves, their neighborhoods, the decision process, and outcomes, have been the subject of numerous studies. In this context, a distinction has emerged between mere citizen involvement in planning initiated by public agencies to grassroots and bottom-up planning that originates from within neighborhoods and citizen groups and whose decisions are adopted by public agencies.  Through a case study based in...
Tipo: Working or Discussion Paper
Palavras-chave: Land use -- Planning -- Citizen participation -- Wisconsin -- Madison City planning -- Wisconsin -- Madison Community gardens -- Wisconsin -- Madison Troy Gardens (Madison; Wis.) Community/Rural/Urban Development Land Economics/Use.
Ano: 1999
URL: http://purl.umn.edu/12775

Development in the Midst of Drought: Evaluating an Agricultural Extension and Credit Program in Nicaragua.
Provedor de dados: 31
Autores: Mullally,   Conner.
This essay is an evaluation of year one of the Rural Business Development (RBD) program for small rice farmers in León, Nicaragua. The RBD program is administered by the Millennium Challenge Corporation, and is designed to deliver agricultural extension advice and affordable credit in the form of inputs to farm households. This essay estimates the average impact of the program on rice yields and revenues utilizing inverse propensity score weighting combined with linear regression. In conducting statistical inference, it also accounts for the fact that agricultural outcomes are likely correlated over space in a small area such as the one studied here. The results suggest that the program had no impact on average, likely due to the presence of a severe...
Tipo: Conference Paper or Presentation
Palavras-chave: Development; Program evaluation; Agricultural extension.; International Development.
Ano: 2011
URL: http://purl.umn.edu/109664

Climate Change and Forest Sinks: Factors Affecting the Costs of Carbon Sequestration
Provedor de dados: 31
Autores: Newell,   Richard G.; Stavins,   Robert N.
The possibility of encouraging the growth of forests as a means of sequestering carbon dioxide has received considerable attention because of concerns about the threat of global climate change due to the greenhouse effect. In fact, this approach is an explicit element of both U.S. and international climate policies, partly because of evidence that growing trees to sequester carbon can be a relatively inexpensive means of combating climate change. But how sensitive are such estimates to specific conditions? We examine the sensitivity of carbon sequestration costs to changes in critical factors, including the nature of the management and deforestation regimes, silvicultural species, agricultural prices, and discount rates. We find, somewhat...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/10559

Las cuotas lecheras en Espana: analisis estructural comparado de los efectos en su gestion
Provedor de dados: 31
Autores: Ordonez,   Victoriano Calcedo.
RESUMEN: La reestructuración que acompaña al régimen de cuotas en España, que pudo tener un sesgo más propio, sigue en sus resultados pautas de otros países de la UE. La trayectoria del proceso es similar a la de Alemania o Francia. Sin embargo, en cuanto al patrón para la gestión de las cuotas se ha venido inclinando hacia el esquema flexible del Reino Unido y Holanda, incluso regionalizando de facto el tráfico de cuotas, pues las transacciones entre CC.AA. están sometidas a fuertes limitaciones administrativas. En España el sistema de estado ha propiciado un escenario como el francés o el alemán, pero obtenido de esa gestión liberal de las cuotas según los modelos británico y holandés. Más que la desvinculación de cuota y tierra, han jugado los intereses...
Tipo: Journal Article
Palavras-chave: Milk production; Milk quotas; Livestock Production/Industries; Q13; Q18.
Ano: 2002
URL: http://purl.umn.edu/28761

Modeling farmer participation to a revenue insurance scheme by means of Positive Mathematical Programming
Provedor de dados: 31
Autores: Severini,   Simone; Cortignani,   Raffaele.
European farmers face increasing income uncertainty and the debate is growing on the role of insurance schemes and of public support in this field. This debate is further stimulated by the perspective of introducing instruments to cope with risk also in the Common Agricultural Policy. Therefore, there is a need for empirical analysis and tools aimed at providing empirical evidences on this subject. This paper applies a PMP modelling approach that takes into explicit consideration risk aversion behaviour to test the possibility to use it to assess the implications of participating in a insurance scheme. This is done by introducing a revenue insurance scheme into a model developed on a small group of crop farms in Italy. In particular, a quadratic mix...
Tipo: Conference Paper or Presentation
Palavras-chave: Insurance schemes; PMP; Farmers’ participation; Risk aversion; Non-linear mix-integer programming; Farm Management; Risk and Uncertainty; Q12; C61; Q18.
Ano: 2011
URL: http://purl.umn.edu/116001

Invasive Species Management through Tariffs: Are Prevention and Protection Synonymous?
Provedor de dados: 31
Autores: Ranjan,   Ram.
Replaced with revised version of paper 12/15/05.
Tipo: Conference Paper or Presentation
Palavras-chave: Invasive Species; Political Economy; Tariffs; Bargaining; Interest Groups; International Relations/Trade; H23; Q17; Q58.
Ano: 2005
URL: http://purl.umn.edu/19515

ECONOMICS OF DETECTION AND CONTROL OF INVASIVE SPECIES: WORKSHOP HIGHLIGHTS
Provedor de dados: 31
Autores: Koo,   Won W.; Mattson,   Jeremy W.
Invasive species are species that are not native to an ecosystem, and when introduced into the new ecosystem, they cause economic or environmental damage.  Trade is one way in which these species are introduced into new regions, and as trade increases, the introduction of invasive species also rises.  The Center for Agricultural Policy and Trade Studies, North Dakota State University, held a workshop on April 30, 2004 in Fargo, ND, titled ?Economics of Detection and Control of Invasive Species? to address these issues.  The purpose of this workshop was to present current findings on the subject of invasive species in agricultural trade and to structure the model for an in-depth research project examining this issue.  Speakers included experts from the...
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/23068

Age, Health, and the Willingness to Pay for Mortality Risk Reductions: A Contingent Valuation Survey in Japan
Provedor de dados: 31
Autores: Itaoka,   Kenshi; Krupnick,   Alan J.; Akai,   Makoto; Alberini,   Anna; Cropper,   Maureen L.; Simon,   Nathalie B.
A contingent valuation survey was conducted in Sizuoka, Japan, to estimate the willingness to pay (WTP) for reductions in the risk of dying and calculate the value of statistical life (VSL) for use in environmental policy in Japan. Special attention was devoted to the effects of age and health characteristics on WTP. We find that the VSLs are somewhat lower (103 to 344 million yen) than those found in the virtually identical survey applied in some developed countries. These values were subject to a variety of validity tests, which they generally passed. We find that the WTP for those over age 70 is lower than that for younger adults, but that this effect is eliminated in multiple regression. Rather, when accounting for other covariates, we find that WTP...
Tipo: Working or Discussion Paper
Palavras-chave: Willingness to pay; Value of statistical life; Mortality risk; Contingent valuation; Age; Risk and Uncertainty.
Ano: 2005
URL: http://purl.umn.edu/10829

DEBATE SOBRE FUNÇÕES SÓCIO-AMBIENTAIS DA PROPRIEDADE FUNDIÁRIA E A NOÇÃO DE MULTIFUNCIONALIDADE DA AGRICULTURA
Provedor de dados: 31
Autores: Alles,   Jair Miguel; Marques,   Paulo Eduardo Moruzzi.
Esse artigo procura traçar paralelos entre o debate da multifuncionalidade da agricultura e a evolução das concepções em torno da propriedade fundiária: de um direito irrestrito à sua função sócio-ambiental. Através da análise histórica de legislações há um esforço no sentido de captar novos sentidos atribuídos as multifunções da agricultura e da propriedade fundiária. Na atualidade, a incorporação de demandas ambientais reorientaram essa discussão, que já demonstra essa perspectiva mais claramente a partir do marco da Constituição Federal de 1988. Outra proposta do artigo, finalmente é aproximar a discussão acerca do tema do desenvolvimento territorial sustentável, propondo a contratualização, dentro da ótica do direito agrário, como ação viável de...
Tipo: Conference Paper or Presentation
Palavras-chave: Funções sócio-ambientais; Multifuncionalidade da agricultura; Desenvolvimento territorial sustentável; Social-environmental functions; Multiple functions from agriculture; Territory sustainability development; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/113394

Evaluating existing policy flexibilities in WTO agricultural negotiations: different criteria for the selection of sensitive products
Provedor de dados: 31
Autores: Listorti,   Giulia; Kempen,   Markus; Girardin,   Jean; Kranzlein,   Tim.
Within WTO agricultural negotiations, this paper deals with alternative criteria for the selection of sensitive products. Existing methodologies mostly rely on the analysis of tariffs and trade flows. On the contrary, assessments of the economic impacts on specific groups of stakeholders, namely the domestic agricultural sector, are missing or conducted at a high level of product aggregation. We hence develop a methodology that considers the effects of the selection of sensitive products on domestic agricultural prices. Our model, TRIMAG (Tariff Reduction Impact Model for Agriculture), defined at the 8-digit level, optimizes the domestic agricultural value added subject to a maximum number of sensitive tariff lines. The existing methodologies are applied...
Tipo: Conference Paper or Presentation
Palavras-chave: WTO agricultural negotiations; Market access; Sensitive products; Agricultural and Food Policy; International Relations/Trade; F13; Q17.
Ano: 2011
URL: http://purl.umn.edu/98986

The Role of Trust in Emerging Food Supply Network Relations
Provedor de dados: 31
Autores: Fritz,   Melanie.
The food sector is the largest economic sector in the European Union (CIAA, 2005). It consists of a complex, global and dynamically changing network of trade streams, food supply network relations and related product flows (Fritz, Schiefer, 2008a). Food supply networks are subject to dynamically changing circumstances, which include fluctuations at primary production due to changes in weather or climate, impacting supply and demand and prices, and also impacting the quality of raw material, variations in food consumption due to seasonality or the westernization of diets in Asia (see e.g. OECD-FAO, 2006, Pingali, 2006), the development of alternative uses of raw material such as bio-fuel, and, not the least, from changing attitudes of society towards the...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Research and Development/Tech Change/Emerging Technologies; Risk and Uncertainty.
Ano: 2009
URL: http://purl.umn.edu/59178

Household Resources Allocation, Gender, and Economic Performance: Empirical Evidence from Senegal, West Africa
Provedor de dados: 31
Autores: Ndoye Niane,   Aifa Fatimata.
This paper has examined Pareto efficiency of household resources allocation and the appropriateness to use gender-specific models rather than unitary model while investigating economic performance of men and women managers of separate plots within horticultural households in Senegal, West Africa. This paper contributes to the gender and economics literature providing empirical evidence of intrahousehold resources allocation in a specific social, economic and cultural context in which polygamy occurs and where husband and wives manage separately their plots. The findings confirm the suitability of gender-specific models to shed light on the gender differential of performance. As the subject matter is efficiency, as well in econometric as in economic point...
Tipo: Conference Paper or Presentation
Palavras-chave: Household Resources Allocation; Gender; Economic Performance; Horticulture; Senegal; Agricultural and Food Policy; Crop Production/Industries; Production Economics; Productivity Analysis; D2.
Ano: 2009
URL: http://purl.umn.edu/50902

Fiscal policy consistency and its implications for macroeconomic aggregates: The case of Uganda
Provedor de dados: 31
Autores: Hisali,   Eria.
The relationship between growth in monetary aggregates and price changes continues to be a subject of considerable debate both in the academic and policy circles. Whereas the more ‘conservative’ policy makers hold that growth in monetary aggregates bear proportionately on prices, ‘liberals’ on the other hand suggest a fairly weak relationship and instead mainly attribute sustained price changes to other innovations (including structural weaknesses and poor productive capacity). This study employed vector autoregression techniques (and its variants) to examine both short term as well as long term interactions between selected macroeconomic aggregates with particular focus on the relationship between money growth and price changes. Results from both the...
Tipo: Report
Palavras-chave: Fiscal stance; Macroeconomic aggregates; Structural vector autogression; Budget accounting approach; Agribusiness; Agricultural Finance; Financial Economics; Institutional and Behavioral Economics; Public Economics; H62; H63; H69.
Ano: 2010
URL: http://purl.umn.edu/113615

Economic Growth and Environmental Degradation
Provedor de dados: 31
Autores: Burnett,   J. Wesley.
Economists, ecologists, private industries and government decision-makers have long been interested in the relationships between economic growth and environmental quality.  These relationships are often the subject of intense public policy debates such as the current debate surrounding global climate change issues.  From an ecological or environmental perspective, the argument is often made that economic growth is bad for the environment.  But, what story do the data tell?  In order to address the question, a estimable model was used to analyze the effects between gross domestic product (GDP) and environmental indications for air pollution in over 100 metropolitan statistical areas in the United States from 2001-2005.  The analysis is then expanded to...
Tipo: Conference Paper or Presentation
Palavras-chave: Air Pollution; Environmental Economics; Environmental Kuznets Curve; Fixed effects regression; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/46838

Community Control in a Global Economy: Lessons from Mexico's Economic Integration Process
Provedor de dados: 31
Autores: Waters,   Eliza; Wise,   Timothy A.
The North American Free Trade Agreement appeared to promise economic growth for Mexico and improved living conditions for its people. While the Mexican economy has recovered significantly from its post-NAFTA collapse, there is mounting evidence that many of the pre-NAFTA warnings of worsening poverty and deteriorating environmental conditions were true, if exaggerated. However one interprets the statistics, there is little doubt that the economic integration process, which began a full decade before NAFTA took effect, has created a significant restructuring of the Mexican economy, with some of the country's most vulnerable residents facing the harshest conditions. How have those most affected by the economic integration process responded to the challenges...
Tipo: Working or Discussion Paper
Palavras-chave: Community/Rural/Urban Development.
Ano: 2001
URL: http://purl.umn.edu/15584

Towards the development of a transferable set of value estimates for environmental attributes
Provedor de dados: 31
Autores: van Bueren,   Martin; Bennett,   Jeffrey W.
Estimates of environmental values are frequently required as inputs to cost‐benefit analyses when evaluating alternative options for managing natural resources. One strategy to avoid the high cost of conducting empirical work when non‐market values are involved is to use value estimates from an existing source study and to transfer them to the target context of interest (a practice known as benefit transfer). However, the transfer of values is subject to a host of potential errors and could lead to significant overestimation or underestimation of welfare change. The present paper reports the results of a choice modelling study in which household values for the impacts of land and water degradation in Australia are estimated. A key objective of the present...
Tipo: Journal Article
Palavras-chave: Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/117859

Mortality Risk Valuation for Environmental Policy
Provedor de dados: 31
Autores: Krupnick,   Alan J.; Alberini,   Anna; Cropper,   Maureen L.; Simon,   Nathalie B.; Itaoka,   Kenshi; Akai,   Makoto.
Most benefit-cost analyses of reductions in air pollutants and other pollutants carrying mortality risks rely on estimates of the value of reductions in such risks produced by compensating wage studies, or contingent valuation studies that value risk reductions in the context of transport or job-related accidents. As we argue below, these estimates are inappropriate when valuing risk changes produced by environmental programs. The objectives of this paper are to explain why these estimates are inappropriate and to describe an improved approach to valuing reductions in risk of death from environmental programs, especially programs to reduce air pollution. We have implemented this approach in a pilot study in Tokyo, Japan. The paper provides estimates of the...
Tipo: Working or Discussion Paper
Palavras-chave: Mortality risk valuation; Contingent valuation; Japan; Environmental Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/10882

Optimising the spatial pattern of landscape revegetation
Provedor de dados: 31
Autores: Polyakov,   Maksym; Pannell,   David J.; Rowles,   Alexei; Park,   Geoff; Roberts,   Anna M.
The spatial pattern of landscape reconstruction makes a substantial difference to environmental outcomes. We develop a spatially explicit bio-economic model that optimises the reconstruction of a heavily cleared landscape through revegetation. The model determines the spatial priorities for revegetation that minimises economic costs subject to achieving particular improvements in habitat for 29 woodland-dependent bird species. The study focuses on the Avoca catchment (330 thousand ha) in North-Central Victoria. Our model incorporates spatial pattern and heterogeneity of existing and reconstructed vegetation types. The revegetation priorities are identified as being: sites in the vicinity of existing remnants, riparian areas, and parts of the landscape with...
Tipo: Conference Paper or Presentation
Palavras-chave: Landscape reconstruction; Biodiversity; Optimisation; Habitat; Environmental Economics and Policy; Land Economics/Use; Q57.
Ano: 2011
URL: http://purl.umn.edu/100697

CAPTIVE SUPPLY TRENDS AND IMPACTS SINCE THE ADVENT OF MANDATORY PRICE REPORTING
Provedor de dados: 31
Autores: Ward,   Clement E.; Hornung,   Jonathan T.
Captive supplies have been a contentious issue in the livestock industry for fifteen years and the subject of both theoretical and empirical research. In 2001, mandatory price reporting was implemented. One objective by its proponents was to increase the amount of information available on captive supplies. This paper examines data now available as a result of mandatory price reporting to determine what additional information is available compared to previously. Second, several models were specified and estimated to determine the impacts captive supplies had on fed cattle prices in the two years following implementation of mandatory price reporting. Models showed mixed results. There was a consistent negative effect on cash market prices from formula priced...
Tipo: Conference Paper or Presentation
Palavras-chave: Livestock Production/Industries; Marketing.
Ano: 2004
URL: http://purl.umn.edu/19016

Impact of Sanitary and Technical Measures on Brazilian Exports of Poultry Meat
Provedor de dados: 31
Autores: Fassarella,   Luiza Meneguelli; Souza,   Mauricio Jorge Pinto de; Burnquist,   Heloisa Lee.
The major objective of this work is to evaluate the effects of technical and sanitary measures introduced by the main world importers upon Brazilian poultry meat in the international market. The impact of the measures is estimated using a gravity model constructed with disaggregated data about bilateral poultry meat between Brazil and its major trade partners for the period from 1996 to 2009. The gravity model is estimated with a fixed effects model and the results indicate that the impact of TBT and SPS measures upon Brazilian poultry meat exports is ambiguous. The results indicated that the existence of technical and sanitary regulations related to labelling might be stimulating trade of this product, while the presence regulations related to compliance...
Tipo: Conference Paper or Presentation
Palavras-chave: Technical and Sanitary measure; Poultry meat; Gravity equation; International Relations/Trade.
Ano: 2011
URL: http://purl.umn.edu/103453

A Need for Caution in Applying the Volume-Based Special Safeguard Mechanism
Provedor de dados: 31
Autores: Ivanic,   Maros; Martin,   William J.
The proximate cause of the collapse of the Doha Agenda negotiations in 2008 was disagreement over the volume-based Special Safeguard Mechanism (SSM). This measure would provide a right, but not an obligation, for developing countries to impose a duty when imports increase. While many simulations of its impact on domestic prices are available, there appear to be no analyses of its potential impacts on the welfare of poor households. Whether such a safeguard will increase or reduce poverty can only be determined empirically—if there are enough small, poor farmers who are net sellers of the commodity when the duty is imposed, then imposition of a safeguard duty may reduce poverty. If, by contrast, most small, poor farmers are net buyers of the products...
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade.
Ano: 2011
URL: http://purl.umn.edu/103969

International Trade, Productivity Growth, Education and the Wage Differential: A Case Study of Taiwan
Provedor de dados: 31
Autores: Chang,   Hsiao-chuan.
The cause of changes in the wage differential between skilled and unskilled labor has been an important subject of debate for several decades. International trade and productivity growth are two main causes that have been suggested from large country studies. Recent research proposes that education is another influence. All three causes have been significantly associated with Taiwan’s economic development. This paper attempts to contribute to the literature by investigating the wage differential in Taiwan, a small open economy. A Dynamic Intertemporal General Equilibrium (DIGE) model is used to perform theoretical simulation. An Error Correction Model (ECM) incorporating both short- and long-run effects is employed to accomplish the empirical examination....
Tipo: Journal Article
Palavras-chave: Wage differential; Dynamic intertemporal general equilibrium model; Error correction model; International Relations/Trade; Labor and Human Capital; C12; C15; C51; F10; F41; H52; J31.
Ano: 2003
URL: http://purl.umn.edu/44011

Valuing Consumer Preferences with the CUB Model: A Case Study of Fair Trade Coffee
Provedor de dados: 31
Autores: Cicia,   Gianni; Corduas,   Marcella; Del Giudice,   Teresa; Piccolo,   Domenico.
D'Elia and Piccolo (2005) have recently proposed a mixture distribution, named CUB, for ordinal data. The use of such a mixture distribution for modelling ratings is justified by the following consideration: the judgment that a subject expresses is the result of two components, uncertainty and selectiveness. The possibility of relating the parameters of CUB models to covariates makes the formulation interesting for practical applications In this case study, a sample of 224 fair‐trade coffee consumers were interviewed at stores. With this data‐set, CUB model split consumers, according to their preferences, in two different segments: one showing high price elasticity, and one with a low price elasticity. As regards the potential of the CUB model, it showed a...
Tipo: Journal Article
Palavras-chave: CUB model; Fair trade coffee; Latent class choice model; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods.
Ano: 2010
URL: http://purl.umn.edu/91144

Should we combine incentive payments and tendering for efficiently purchasing conservation services from landholders?
Provedor de dados: 31
Autores: Schilizzi,   Steven; Breustedt,   Gunnar; Latacz-Lohmann,   Uwe.
Policy makers aiming to get private landholders to provide non-marketed environmental services need to provide efficient economic incentives. Two ideas have been explored to achieve this: linking contract payments to environmental outcomes and putting the contracts up for tender. This paper investigates whether there are any gains to be had by combining the benefits of both approaches. Landholder risk aversion may offset incentive effects if the fall in participation outweighs any increases in individual effort. Using controlled lab experiments in two countries and across four subject groups, and systematically varying the rate at which payments are linked to uncertain outcomes, this paper clarifies the conditions under which incentives overcome...
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation tenders; Auctions; Incentive contracts; Agricultural policy; Environmental policy; Market-based instruments; Experimental economics; Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/59159

Modeling Soybean Prices in a Changing Policy Environment
Provedor de dados: 31
Autores: Goodwin,   Barry K.; Schnepf,   Randall D.; Dohlman,   Erik.
The oilseed products complex is an important component of the U.S. agricultural sector. In 2000, almost 75 million acres were planted to soybeans, representing over 29 percent of total planted acreage, making soybeans second only to corn in terms of acreage (ERS/USDA, 2000). Soybean acreage has increased steadily since 1990, when only 58 million acres were planted. From a historical perspective, soybeans are rather unique in that they were not eligible for target-price deficiency payments nor were they subject to the explicit acreage restrictions of other program crops. However, the acreage-idling and base-acreage requirements, as well as government stock-holding behavior, of other program crops has indirectly affected soybean acreage decisions in the...
Tipo: Conference Paper or Presentation
Palavras-chave: Demand and Price Analysis.
Ano: 2001
URL: http://purl.umn.edu/18946

Economic Impact Assessment of Bovine Tuberculosis in the South West of England
Provedor de dados: 31
Autores: Butler,   Allan J.; Lobley,   Matt; Winter,   Michael.
Bovine TB (bTB) presents a significant challenge to beef and dairy farmers. In 2009 7,449 herds were subject to movement restrictions in Great Britain because of bTB. Of these, 52% were in South West England and 20% were in Devon alone. With over 25% of holdings with cattle in the South West likely to suffer a bTB breakdown within the course of a year, understanding the cost implications on farm businesses is vital in order to demonstrate the impact that this disease is having on agricultural communities and the agricultural economy. The research undertaken for this report has revealed considerable variation across a range of different types of costs associated with bTB. Consequently average figures, either for costs or calculating compensation, obscure...
Tipo: Report
Palavras-chave: Bovine Tuberculosis; Costs; Beef farmers; Dairy farmers; Agricultural and Food Policy; Farm Management.
Ano: 2010
URL: http://purl.umn.edu/94718

Adoption of Soil Erosion Control Practices in Southern Spain Olive Groves
Provedor de dados: 31
Autores: Franco,   Juan Agustin; Calatrava-Leyva,   Javier.
This paper presents results from a survey carried out in 2005 among 147 olive tree farmers from the Alto Genil River Basin in Southern Spain regarding the adoption of soil conservation and management practices. Olive tree groves in South-eastern Spain's mountainous areas are subject to a high risk of soil erosion and have to incur in high costs of soil conservation. This results in great difficulties to comply with cross-compliance and to benefit from agri-environmental schemes. Our main objectives are to analyse the current level of adoption of soil conservation practices and to analyse which socio-economic and institutional factors determine such adoption. Three Probit models are estimated. Dependant variables are three different soil conservation...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive groves; Soil erosion; Soil conservation; Cross compliance; Crop Production/Industries; Q12; Q24.
Ano: 2006
URL: http://purl.umn.edu/25787

Prerequisites and limits for economic modelling of climate change impacts and adaptation
Provedor de dados: 31
Autores: Jotzo,   Frank.
There is demand for qualitative and quantitative economic analysis on the optimum degree of climate change mitigation and adaptation, the optimal timing of such actions, and their optimum distribution between countries and sectors.   This paper discusses what is, as well as what is not, possible for economic modelling in this field. Specific reference is made to the paper by Bosello, Carraro and de Cian (2009), as well as Tol (2009).   Integrated assessment modelling can provide powerful qualitative insights (for example, about the need for both mitigation and adaptation and the interactions between the two, or the need for both individual and policy-driven adaptation). However, the more detailed quantitative results from such studies are subject are...
Tipo: Report
Palavras-chave: Environmental Economics and Policy; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/94951

In vitro culture at low temperature and ex vitro acclimatization of Vriesea inflata an ornamental bromeliad
Provedor de dados: 88
Autores: Pedroso,Andrea Nunes Vaz; Lazarini,Rosmari Aparecida de Morais; Tamaki,Vívian; Nievola,Catarina Carvalho.
(In vitro culture at low temperature and ex vitro acclimatization of Vriesea inflata an ornamental bromeliad). In vitro culture by seeds is a technique for preservation of threatened species because it may provide a large number of plants with genetic diversity. The bromeliad Vriesea inflata (Wawra) Wawra, an ornamental bromeliad, is extensively and illegally collected from the nature and must be preserved. It is possible to form plant threatened collections in vitro by reducing the temperature of culture, while occupying little space, with the consequent reduction of maintenance costs. This work evaluated the influence of temperature on in vitro growth and morphology of plants of V. inflata, with the aim of establishing a slow growth-rate and analyzing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Bromeliaceae; Conservation; Growth; Photosynthetic pigments.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000300004

Floristic composition and topographic variation in a tidal floodplain forest in the Amazon Estuary
Provedor de dados: 88
Autores: CATTANIO,JOSÉ H.; ANDERSON,ANTHONY B.; CARVALHO,MANOEL S.
Slight topographic variations appear to exert dramatic effects on the structure of forests subject to inundation. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we examined these effects by studying floristic composition along a topographic gradient. We predicted that, relative to high sites, low sites would be characterized by high representation of life forms and taxa characteristic of inundated sites. We found striking variations in floristic composition along a slight topographic gradient. In comparison with topographically high sites, low sites were characterized by a high representation of Palm trees (Arecaceae), low diversity of trees and lianas, and high plant density. These variations appear to reflect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floodplain; Floristic; Forest; Topography; Várzea.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000006

Phenology, litterfall, growth, and root biomass in a tidal floodplain forest in the Amazon estuary
Provedor de dados: 88
Autores: Cattanio,José H.; Anderson,Anthony B.; Rombold,John S.; Nepstad,Daniel C.
The dynamics of forests subject to inundation appears to be strongly influenced by the frequency and intensity of natural disturbances such as flooding. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we tested this prediction by measuring seasonal patterns of phenology and litterfall in relation to two key variables: rainfall and tide levels. In addition, we estimated the root biomass and the annual growth of the forest community by measuring stem increments over time. Our results showed high correlations between phenological events (flowering and fruiting) and rainfall and tide levels, while correlations between litterfall and these variations were generally weaker. Contrary to our prediction, root biomass to 1 m...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Floodplain forest; Litterfall; Phenology; Productivity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000400010

Presence of antibodies against H5, H7 and H9 influenza A virus in wild birds in the State of São Paulo, Brazil
Provedor de dados: 89
Autores: Sousa,E de; Costa,T P; Werther,K; Durigon,EL; Araujo,J de; Ferreira,CS; Pinto,AA.
Although the natural reservoirs of the avian influenza (AI) virus have been extensively studied in many countries, there is a clear lack of information on this subject in South America, particularly in Brazil. The objective of this study was to conduct a serological survey for H5, H7 and H9 antibodies to AI-subtype viruses in wild birds in the state of São Paulo , Brazil. Serum samples were tested using the hemagglutination-inhibition assay. Out of the 31 wild birds sampled between January and December of 2006, seven (22.58%), were seropositive for H5, H7 and H9; four (12.90%) were seropositive for H5 and H7; 13 (41.94%), were seropositive only for H7; three (9.7%), were seropositive only for H9; and four (12.90%) were negative for all three hemagglutinin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avian influenza virus; Brazil; Hemagglutination inhibition; Reservoir; Wild bird.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300001

EFFECT OF EGGSHELL COLOR ON THE EGG CHARACTERISTICS AND HATCHABILITY OF GUINEA FOWL (NUMIDA MELEAGRIS) EGGS
Provedor de dados: 89
Autores: Eleroğlu,H; Yıldırım,A; Duman,M; Okur,N.
ABSTRACT The objective of this study was to determine the effects of eggshell color of guinea fowl (Numida meleagris) eggs on eggshell quality and hatchery results. The highest mean grey value (MGV), integrated density (ID), lightness (L*) and Hue angle (H*) values were obtained in eggs with lighter eggshell color. The effects of color difference (DE*) value levels on egg characteristics were evaluated. Eggshell color presented different (p&lt;0.01) MGV, ID, L*, redness (a*), yellowness (b*), H* and Chroma (C*) values. Eggs with lighter color presented thicker eggshells and lower egg weight loss on day 25 of incubation (p&lt;0.05) compared with intermediate and darker eggs. Eggshell color did not have any significant effect on fertility and hatchability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Guinea fowl (Numida meleagris ); Breeder; Eggshell color; Hatchability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000500061

Probiosis: concepts and prospects
Provedor de dados: 89
Autores: Barbosa,Lima R; Figueiredo-Lima,DF; Givisiez,PEN; Rabello,CBV; Gonzales,E; Silva,JHV.
The use of probiotics in animal and human feeding has been a subject of increasing interest both for the academia and the industry, mostly due to their potential positive effects on health and profitability. However, the knowledge on the composition of bacterial gastrointestinal communities in humans and animals, as well as its respective nutritional requirements, is far from being elucidated. Due to the ban of the use of antibiotic growth promoters in animal feeds, there has been an increasing interest on the utilization of probiotics to improve animal intestinal health under commercial settings. However, the possibility of horizontal transference of antibiotic-resistant genes between probiotic bacteria and pathogenic species has become a concern of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibiotics; Microbiota; Prebiotics; Probiotics; Phytogenics.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400001

Attributes of irrigated rice and soil solution as affected by salinity levels of the water layer
Provedor de dados: 90
Autores: Fraga,Thiago Isquierdo; Carmona,Felipe de Campos; Anghinoni,Ibanor; Marcolin,Elio.
In the State of Rio Grande do Sul, Brazil, flooded rice fields using Patos Lagoon as the source of water for irrigation are subject to be damaged by salinity, since this source is bound to the sea on its southern end. The sensitivity of rice is variable during plant development, being higher in the seedling and reproductive periods. However, there is not enough information about the behavior of plants under salt stress during the course of its development, especially in the vegetative stage. This study evaluated the effect of different levels of salinity of irrigation water on the salinity of soil solution over time and on some plant attributes, during the vegetative stage of rice. The study was conducted in a greenhouse, where seeds of the variety IRGA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Electrical conductivity; Tillering; Vegetative growth; Oryza sativa L.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400005

Estimate of Groundwater Recharge Based on Water Balance in The Unsaturated Soil Zone
Provedor de dados: 90
Autores: Melo,Davi de Carvalho Diniz; Wendland,Edson; Guanabara,Rafael Chaves.
ABSTRACT Groundwater management depends on the knowledge on recharge rates and water fluxes within aquifers. The recharge is one of the water cycle components most difficult to estimate. As a result, despite the chosen method, the estimates are subject to uncertainties that can be identified by means of comparison with other approaches. In this study, groundwater recharge estimates based on the water balance in the unsaturated zone is assessed. Firstly, the approach is evaluated by comparing the results with those of another method. Then, the estimates are used as inputs in a transient groundwater flow model in order to assess how the water table would respond to the obtained recharges rates compared to measured levels. The results suggest a good...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SPA model; Guarani Aquifer; Groundwater; Soil-plant interaction.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501336

Evaluation of physical quality indices of a soil under a seasonal semideciduous forest
Provedor de dados: 90
Autores: Oliveira,Thalita Campos; Silva,Laura Fernanda Simões da; Cooper,Miguel.
The concept of soil quality is currently the subject of great discussion due to the interaction of soil with the environment (soil-plant-atmosphere) and practices of human intervention. However, concepts of soil quality relate quality to agricultural productivity, but assessment of soil quality in an agronomic context may be different from its assessment in natural areas. The aim of this study was to assess physical quality indices, the S index, soil aeration capacity (ACt/Pt), and water storage capacity (FC/Pt) of the soil from a permanent plot in the Caetetus Ecological Reserve (Galia, São Paulo, Brazil) under a seasonal semideciduous forest and compare them with the reference values for soil physical quality found in the literature. Water retention...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: S index; ACt/Pt; FC/Pt; Water retention curve.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200009

Quality of raw materials from different regions of Minas Gerais State utilized in ration industry
Provedor de dados: 91
Autores: Coradi,Paulo C.; Lacerda Filho,Adílio F.; Melo,Evandro C.
The present work aimed at evaluating the quality of raw materials destined for animal feed production, as well as the quality of corn produced in different areas of the Minas Gerais State. The study was conducted in a feed mill for poultry, with production capacity of 1,000 t d-1. Samples of corn, soybean, flours, animal meals, and feed, during the year of 2008 were collected for analysis of moisture, acidity, peroxides, crude protein, ethereal extract, and physical classification of the corn for "type". The collection of samples, physical-chemical analysis and classification of corn according to "type" were performed at the Industrial Laboratory and at the Department of Agricultural Engineering of Federal University of Viçosa. It was concluded that: raw...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn; Bran; Flour.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000400015

Genetic fuzzy system for prediction of respiratory rate of chicks subject to thermal challenges
Provedor de dados: 91
Autores: Ferraz,Patrícia F. P.; Yanagi Junior,Tadayuki; Hernandez-Julio,Yamid F.; Ferraz,Gabriel A. e S.; Silva,Maria A. J. G.; Damasceno,Flavio A.
ABSTRACT The aim of this study was to estimate and compare the respiratory rate (breath min-1) of broiler chicks subjected to different heat intensities and exposure durations for the first week of life using a Fuzzy Inference System and a Genetic Fuzzy Rule Based System. The experiment was conducted in four environmentally controlled wind tunnels and using 210 chicks. The Fuzzy Inference System was structured based on two input variables: duration of thermal exposure (in days) and dry bulb temperature (°C), and the output variable was respiratory rate. The Genetic Fuzzy Rule Based System set the parameters of input and output variables of the Fuzzy Inference System model in order to increase the prediction accuracy of the respiratory rate values. The two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Computational intelligence; Physiological responses.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600412

Leaf area estimation of medium size plants using optical metrology
Provedor de dados: 91
Autores: Ribeiro,Kleber M.; Braga,Roberto A.; Scalco,Myriane S.; Horgan,Graham W.
The total leaf area (TLA) estimation is an important feature of the crops and their assessment a challenge, since the direct methods of obtaining it are destructive and time consuming. Non-destructive methods have been explored to obtain the TLA by indirect approaches, in turn creating other features, as the leaf area index. The development of non-destructive technology to access the TLA of a plant has been the subject of much research, and the optical metrology is an promising approach. In this work, some indirect methods associated with optical approaches were evaluated as an alternative to obtain the TLA of the coffee plant. Commercial equipment were used, such as a camera with a fish eye lens and lux meters, associated to the sizes of the canopies were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Optics; Non-destructive technique; Coffee.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000600004

Structural static and modal frequency simulations in a coffee harvester’s chassis
Provedor de dados: 91
Autores: Silva,Evandro P. da; Silva,Fábio M. da; Andrade,Ednilton T. de; Magalhães,Ricardo R.
ABSTRACT Coffee harvesters are subject to stresses and vibrations in their structure, originating from engines and harvesting system. These structures must be designed to avoid rupturing of the components due to fragility of the materials, inadequate geometries, or the phenomenon of resonance, which increases the displacements/deformations of the components. In this scenario, the main objective of this study is to analyse the results of stresses and displacements from two static simulations and to present results of natural vibration frequencies from two modal simulations in a self-propelled coffee harvester. For this purpose, 20 modal shapes were generated, considering coffee harvester reservoir as empty and full. The simulations were carried out using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Design; Vibration; Resonance; Stresses; Displacements.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700511

Record of postmortem injuries caused by the Neotropical social wasp Agelaia fulvofasciata (Degeer) (Hymenoptera, Vespidae) on pig carcasses in the Eastern Amazon region: implications in forensic taphonomy
Provedor de dados: 92
Autores: Barbosa,Rodrigo R.; Carriço,Cesar; Souto,Raimundo N. P.; Andena,Sergio R.; Ururahy-Rodrigues,Alexandre; Queiroz,Margareth M. C.
ABSTRACTPostmortem injuries are a source of misinterpretations in forensic analysis and therefore are subject matter of taphonomic interest. Many types of injuries can cause different artifacts, which deserve attention of the forensic pathologists when evaluating corpses, either at the crime scene or during an autopsy. Insects can be important biotaphonomic agents and their activity may result in artifacts that resemble antemortem injuries. Here, we describe postmortem injuries caused by the Neotropical wasp Agelaia fulvofasciata (Degeer, 1773) on domestic pig carcasses weighting 15 kg. The specimens showed extensive injuries to the lower lip, similar to lacerations, and some minor lesions on the snout and anus. In addition, we observed the same wasp...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Autopsy; Forensic Entomology; Savanna.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000300257

Influence of age and diet on the performance of Cephalonomia stephanoderis (Hymenoptera, Bethylidae) a parasitoid of the coffee berry borer, Hypothenemus hampei (Coleoptera, Curculionidae)
Provedor de dados: 92
Autores: Gómez,Jaime; Barrera,Juan F.; Liedo,Pablo; Valle,Javier.
The importance of age and feeding on the performance of Cephalonomia stephanoderis (Hymenoptera, Bethylidae), a parasitoid of the coffee berry borer, Hypothenemus hampei (Coleoptera, Curculionidae) was investigated in the laboratory. Groups of female parasitoids were subject to the following treatments: a group fed during one, five and ten days after emergence of adults with coffee borer larvae; another group fed only with honey solution during five days after emergence; and as a control, a third group was kept without food for five days. At the end of each treatment, survivorship, parasitoid activity (walking and flying capacity in an arena), search capacity for finding coffee borer-infested berries, host feeding and oviposition (on immature hosts), were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Coffee; Host feeding; Host searching; Survivorship.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000100015

An estimate of the potential number of mayfly species (Ephemeroptera, Insecta) still to be described in Brazil
Provedor de dados: 92
Autores: Cardoso,Mylena Neves; Shimano,Yulie; Nabout,João Carlos; Juen,Leandro.
ABSTRACTThis study reviewed the data on the Brazilian Ephemeroptera, based on the studies published before July, 2013, estimated the number of species still to be described, and identified which regions of the country have been the subject of least research. More than half the species are known from the description of only one developmental stage, with imagoes being described more frequently than nymphs. The Brazilian Northeast is the region with the weakest database. Body size affected description rates, with a strong tendency for the larger species to be described first. The estimated number of unknown Brazilian species was accentuated by the fact that so few species have been described so far. The steep slope of the asymptote and the considerable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Prediction of species diversity; Mayflies.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000300147

Toxic effects of essential plant oils in adult Sitophilus oryzae (Linnaeus) (Coleoptera, Curculionidae)
Provedor de dados: 92
Autores: Franz,Andréa Roveré; Knaak,Neiva; Fiuza,Lidia Mariana.
Toxic effects of essential plant oils in adult Sitophilus oryzae (Linnaeus) (Coleoptera, Curculionidae). Stored grains are subject to losses in quality nutritional value and in sanitation from the time they are stored to the time they are consumed. Botanical insecticides may offer an alternative solution for pest control. The objective was to test the insecticidal properties of the essential oils of Cymbopogon citratus (leaf), Zingiber officinale (root) and Mentha sp. (leaf). The efficacy of these oils was tested to control the rice weevil, S. oryzae, using hydrodistillation. Chemical analysis of the essential oils was carried out by gas chromatography. Major components of C. citratus were geranial (48%) and neral (31%), of Z. officinale were α-zingibereno...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicinal plants; Stored product pests; Botanical insecticides.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000100018

Origin of samples of Cannabis sativa through insect fragments associated with compacted hemp drug in South America
Provedor de dados: 92
Autores: Macedo,Marcos Patrício; Kosmann,Cecília; Pujol-Luz,José Roberto.
Origin of samples of Cannabis sativa through insect fragments associated with compacted hemp drug in South America. Insects associated with a seizure of Cannabis sativa L. may indicate the origin of the illicit drug. Nevertheless, no work regarding this subject has been previously published for South America. In the present investigation, seven kilograms of vegetal material (C. sativa) were inspected for insect fragments. Three species were identified and used to test the origin of the seizure of cannabis plant material: Euschistus heros (Fabricius, 1794), Thyanta perditor (Fabricius, 1794) (Heteroptera, Pentatomidae), and Cephalotes pusillus (Klug, 1824) (Hymenoptera, Formicidae). These insect species restricted the geographic origin of the drug to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Drug traffic; Forensic Entomology; Marijuana.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262013000200009

Regulation of in vitro somatic embryogenesis with emphasis on to the role of endogenous hormones
Provedor de dados: 93
Autores: JIMÉNEZ,VÍCTOR M.
Different aspects of the in vitro somatic embryogenesis regulation are reviewed in this paper.work. A description of g General aspects, such as terminology, uses, stages of development and factors associated with the somatic embryogenesis, are described. is carried out. Although a brief description ofn the effects of the addition of different plant growth regulators to the culture medium wasis given, the article is centereds itself on the effect that the endogenous hormone concentrations in the initial explants and in the tissue cultures derived from them could play oin the induction and expression of somatic embryogenesis. It is significant that few to emphasize the low amount of systematic studies have been conducted, in this subject, in which different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: In vitro morphogenesis; Embryo regeneration; Embryogenic competence; Plant growth regulators; Hormones.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000200008

Effect of industrial processing for obtaining guava paste on the antioxidant compounds of guava (Psidium guajava l.) ‘Paluma’ cv.
Provedor de dados: 94
Autores: Del’Arco,Ana Paula Wolf Tasca; Sylos,Célia Maria de.
Abstract  Some foods constituents are subject to change during thermal and/or industrial processing. In the fruit processing industry, guava pulp is used during guava off season to obtain guava paste, produced with the addition of sugar and citric acid, subjected to various thermal processes. This study evaluated the effect of industrial processing to obtain guava paste on the content of ascorbic acid, total carotenoids, total phenolic and total flavonoid present in guava ‘Paluma’ cv. The results showed that there was an increase of antioxidants in guava pulp (15% ascorbic acid, 59% total carotenoids, 8% total phenolics and 54.5% total flavonoids), probably due to their increased concentration as a result of water loss during processing. There was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic Acid; Carotenoids; Phenolics; Antioxidant Activity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000200901

ASSESSMENT OF THE HEMOAGLUTINANT AND DIGESTIVE ENZYME INHIBITORY ACTIVITY OF EXTRACTS OBTAINED FROM DIFFERENT PARTS OF ATEMOIA
Provedor de dados: 94
Autores: Serquiz,Alexandre Coelho; Serquiz,Raphael Paschoal; Peixoto,Thayane Kerbele Oliveira das Neves; Santos,Elizeu Antunes dos; Rocha,Hugo Alexandre Oliveira.
ABSTRACT  The benefits of various foods, such as fruits and vegetables, have been the focus of several studies aimed at improving welfare, health, and reducing the incidence of diseases. Therefore, the present paper objectified to investigate the presence of molecules of biotechnological and pharmacological interest in peel, seed, and pulp of Annona x atemoya Mabb. Aqueous extracts of the fruit parts were obtained with different buffers and assessed as to their protein and phenolic compounds content. The three parts of the fruit presented different proportions of these compounds when subject to different extraction conditions, with the highest concentrations of proteins being found in the seed and phenolic compounds in the peel of the studied fruit....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annona x atemoya; Residues; Protease inhibitors; Lectins.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000100101

Small-scale experimental contamination with diesel oil does not affect the recolonization of Sargassum (Fucales) fronds by vagile macrofauna
Provedor de dados: 103
Autores: Grande,Henrique; Reis,Marcelo; Jacobucci,Giuliano Buzá.
Coastal regions are subject to various forms of environmental impacts, such as spills of crude oil and associated products, with a wide range of effects on benthic biodiversity. This study characterized the patterns of recolonization of the macrofauna associated with the brown alga Sargassum cymosum(C. Agardh), on fronds contaminated by diesel oil in a small-scale field experiment. We collected 40 fronds of S. cymosum from an algal bed in southeastern Brazil and defaunated each frond by immersion in fresh water. Half of the fronds were then immersed in seawater (control group) and the other half in a mixture of 50% diesel oil and 50% seawater (impacted group). The test fronds were returned to the algal bed, and natural recolonization took place over a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colonization; Marine macrofauna; Phytal.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200006

The surface morphology of the ctenidia of Spondylus spinosus (Mollusca: Bivalvia) from Antalya Bay, Turkey
Provedor de dados: 103
Autores: Aksit,Deniz; Mutaf,Beria Falakali; Balci,Ahmet.
The surface morphology of the ctenidia of Spondylus spinosus Schreibers, 1793 was studied with light and scanning electron microscopy for comparison with the gill structures of other bivalves. The demibranch of S. spinosus is heterorhabdic, with the principal filaments at the descending lamellae and ordinary filaments at the ascending lamellae. The gill lamellae have a prominent gauze-like structure at their distal part, with numerous groups of eight ordinary filaments. They bear ciliary arrays on their frontal surfaces and ostia at their latero-frontal surfaces. Frequent cirral plates form regular interfilamentary junctions. The description of the gill structure of S. spinosus presented here can be used to derive implications for the correlations among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciliary structures; Ctenidia; Morphology; Scanning electron microscopy (SEM); Spiny oyster.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000100008

Performance and serum cortisol concentration in Santa Inês lambs under different suckling schemes
Provedor de dados: 96
Autores: Alves,Ana Carolina; Alves,Nadja Gomes; Ascari,Ivan Júnior; Junqueira,Felipe Barbosa; Maciel,Luciana França Smith; Garcia,Iraides Ferreira Furusho; Lima,Renato Ribeiro.
ABSTRACT The objective of this study was to examine the effects of suckling schemes (continued, controlled, and total separation) and the type of pregnancy on performance and serum cortisol concentration in lambs. A total of 29 Santa Inês ewes and 40 lambs were used, and the randomized block design was applied in a split-plot scheme with a 3 × 2 factorial arrangement in the plot and time in the subplot. For controlled suckling, the diet was supplied twice daily during one hour, starting on their 10th day of life. Total and average daily intakes of concentrate dry matter of lambs that underwent total separation was higher than those of lambs under continued suckling. Lambs subjected to total separation demonstrated higher concentrate dry matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial suckling; Concentrate intake; Controlled suckling; Weight gain.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900546

Behavior of immunocastrated pigs
Provedor de dados: 96
Autores: Santos,Rita de Kássia Silva dos; Caldara,Fabiana Ribeiro; Moi,Marta; Santos,Luan Sousa dos; Nääs,Irenilza Alencar; Foppa,Luciana; Garcia,Rodrigo Garófallo; Borquis,Rusbel Raul Aspilcueta.
ABSTRACT The objective of this study was to evaluate the behavior of immunocastrated male pigs compared with females and castrated males during the period before and after full immunization. A total of 30 animals were divided into three treatments, with ten animals in each (females, barrows, and immunocastrated males). The experiment was divided into three periods: 70 to 80 days of age (period 1), 81 to 110 days of age (period 2), and 111 to 140 days of age (period 3). The behavior of animals during these stages was evaluated. Immunocastrated males showed a higher rate of aggressive and sexual behavior during period 2, which decreased after the second vaccine dose. Both barrows and immunocastrated males presented high locomotion in period 1, reducing the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Immunocastration; Sexual activity; Sus scrofa; Swine production; Welfare.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900540

Strategies and facilities in order to improve animal welfare
Provedor de dados: 96
Autores: Moura,Daniella Jorge de; Bueno,Leda Globbo de Freitas; Lima,Karla Andrea Oliveira de; Carvalho,Thayla Morandi Ridolfi de; Maia,Ana Paula de Assis Maia.
To keep the position in being a world-wide exporter of chicken meat, Brazil must meet international quality standards, always seeking alternative resources of improvement, without increasing production costs, including litter quality, requirements of animal welfare and environment affairs, such as the use and reuse of broiler litter. Researches are performed in the areas of animal welfare, environment, animal behavior and use of modern climatization technology improving the quality of the environment created to raise broilers, also trying to reduce the greenhouse gas emissions and global warming in the environment, becoming a sustainable production system. This paper has a bibliographic revision of the subject mentioned above, intending to show a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Broiler litter; Electrical energy; Environment; Gas; Welfare.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300034

Optimized feed planning for a grazing horse production systems
Provedor de dados: 96
Autores: Oliveira,José Evandro Gervásio de; Soares,João Batista; Barioni,Luis Gustavo; Leite,Gilberto Gonçalves; Braga,Auro César; Menezes,Marcelo Espellet.
The objective of this study was to develop an economically optimal plan for pasture production and supplementary feeding of horses. The plan was based on the optimization of a multiperiodic linear programming model with the objective of minimizing overall feeding costs, subject to the nutritional constraints of each horse category. The model encompasses a period of one year, from January to December, divided in bimonthly periods. Technical coefficients varied among periods based on local information regarding productivity of the forage crops, taking into account the local climatic conditions and seasonality of production. Literature data on feed nutritional value (crude protein and digestible energy), dry matter intake and nutritional requirements of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Linear programming; Modeling; Ration balancing.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000400030

Evolution of the Austral-Antarctic flora during the Cretaceous: New insights from a paleobiogeographic perspective
Provedor de dados: 97
Autores: LEPPE,MARCELO; MIHOC,MARITZA; VARELA,NATALIA; STINNESBECK,WOLFGANG; MANSILLA,HÉCTOR; BIERMA,HESSEL; CISTERNA,KATHERINE; FREY,EBERHARD; JUJIHARA,TOSHIRO.
Forest environments have continuously existed in Antarctica since the late Paleozoic and only disappeared from this continent since the Neogene. Nevertheless, the structure of these forests underwent substantial evolutionary changes. During the late Cretaceous, forests dominated by conifers and pteridophytes were gradually replaced by angiosperm-dominated forests. Elements common to these Antarctic forests are important constituents of the recent Valdivian Forest. During the Turonian stage of the Late Cretaceous, the Antarctic Peninsula and Patagonia were reconnected by a land bridge after a separation since the end of the Jurassic. Using biogeographic tools applied to the palynological and leaf imprint record, outcrops of Campanian-Maastrichtian age were...
Tipo: Journal article
Palavras-chave: Antarctica; Cretaceous; Magellan's basin; Paleobotany; Patagonia.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400002

Trophic parameters and method validation in Lake Riñihue (North Patagonia: Chile) from 1978 through 1997
Provedor de dados: 97
Autores: WOELFL,STEFAN; VILLALOBOS,LORENA; PARRA,ÓSCAR.
Lake Riñihue is the last in a chain of glacially derived oligotrophic lakes in southern Chile and was the subject of limnological research by Dr. Hugo Campos and co-workers at the Universidad Austral de Chile, Valdivia, Chile, since the 1970's. Prof. Campos died in the field in 1998, and this paper now presents a review of these data with comments on methodology relevant to trophic parameters of this lake. Data are presented on inorganic nutrients, chlorophyll a, phytoplankton biomass, primary production and Secchi depth obtained over a period of 21 years between 1978 and 1997 in order to evaluate potential changes in these parameters over time. Non-parametric Wilcoxon rank sum tests were applied to determine temporal trends and revealed: (1) total...
Tipo: Journal article
Palavras-chave: Eutrophication; North Patagonian lake; Nutrients; Trophy; Analytical methods.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300010

Marine photosynthetic eukaryotes in polar systems: Unveiling phytoplankton diversity and composition in Antarctic waters
Provedor de dados: 97
Autores: DE LA IGLESIA,RODRIGO; TREFAULT,NICOLE.
Antarctic waters are a particular marine environment mainly due to the strong seasonal variations that various parameters are subject to, like light availability and temperature. As in all oceanographic regions, food webs are sustained by photosynthetic microorganisms, which in the case of Antarctic environments seem to be strongly dominated by its eukaryote component. Assessing the ecological role of photosynthetic microbial eukaryotes requires a basic knowledge of their diversity and community composition. This review integrates the available information regarding this component of Antarctic phytoplankton as a way to unveil its diversity and how they respond to the strong changes that occur in this environment. Although several studies indicate the...
Tipo: Journal article
Palavras-chave: Antarctic; Biodiversity; Photosynthetic eukaryotes; Phytoplankton; Antártica; Biodiversidad; Eucariontes fotosintéticos; Fitoplancton.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400006

Soil compaction in areas of maize used for silage with the application of wastewater
Provedor de dados: 124
Autores: Melo,Dirceu de; Nóbrega,Lúcia Helena Pereira; Maggi,Marcio Furlan; Gnoatto,Estor; Marchetti,Ivair.
ABSTRACT The mechanical resistance of the soil to penetration (RP) was evaluated over two consecutive years in areas where off-season maize is produced for silage. Removal of the aerial part of the maize during the ensiling process leaves the soil exposed and subject to compaction, which may compromise a no-till system (NTS). The aim of this study therefore, was to monitor the RP of a soil under plant cover associated with the application of wastewater from pig farming (WPF) in areas of maize ensiling under NTS. The study was conducted in Matelândia, in the State of Paraná, employing seven management systems: soybean/silage/oats and turnip (SSOT); soybean/oats and turnip (SOT); soybean/silage/scarification + oats and turnip (SSSOT); soybean/silage and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanical resistance of the soil to penetration; Crop rotation; Systems of soil management.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200205

Expansion of the biocontrol spectrum of foliar diseases in rice with combinations of rhizobacteria
Provedor de dados: 124
Autores: Souza Júnior,Ismail Teodoro de; Schafer,Jaqueline Tavares; Corrêa,Bianca Obes; Funck,Gustavo Daltrozo; Moura,Andréa Bittencourt.
ABSTRACT The cultivation of irrigated rice is subject to the occurrence of various diseases, where damage causes losses in productivity. Alternatives are currently being sought to control these diseases, with biocontrol a viable possibility. With the aim of broadening the spectrum of action of biocontrol, this study evaluated the effect of combinations of biocontrol bacteria on rice blast (Pyricularia grisea), brown spot (Bipolaris oryzae) and leaf scald (Gerlachia oryzae) in rice plants. The effect of isolate combinations was assessed by microbiolization of seeds from the rice cultivar El Paso L144 with suspensions of the bacteria DFs185 (Pseudomonas synxantha), DFs223 (P. fluorescens), DFs306 (unidentified), DFs416 and DFs418 (Bacillus sp.), used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Pyricularia grisea; Bipolaris oryzae; Gerlachia oryzae; Seed microbiolization.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300513

Transmission of tenocarpella maydis by maize seeds
Provedor de dados: 124
Autores: Siqueira,Carolina da Silva; Barrocas,Ellen Noly; Machado,José da Cruz; Corrêa,Carla Lima.
ABSTRACT tenocarpella maydis is one of the main fungi associated with maize seeds, being a causative agent of stalk and ear rot, a disease which causes considerable losses for crop-producing regions in Brazil. The organism is considered to be a pest, subject to sanitary standardisation in current programs of seed certification in the country. The aim of this study was to evaluate the transmission rate of the fungus from infected maize seeds. Seeds were inoculated with two isolates using a method of physiological conditioning, in which the seeds are kept in contact with colonies of the fungus for 24 (P1), 48 (P2), 72 (P3) and 96 (P4) hours. Two cultivars were used, one susceptible (C1) and one moderately resistant (C2), and the trial carried out at two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytopathology; Seed pathology; Water restriction; Stalk and ear rot; Fungus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200393

Adaptability and yield stability of cowpea elite lines of semi-prostrate growth habit in the cerrado biome
Provedor de dados: 124
Autores: Sousa,Massaine Bandeira e; Damasceno-Silva,Kaesel Jackson; Rocha,Maurisrael de Moura; Menezes Júnior,José Ângelo Nogueira de; Lima,Laíze Raphaelle Lemos.
ABSTRACT The effects of the genotype × environment interaction can be reduced by using cultivars with high adaptability and good yield stability. Studies on this subject allow identification of genotypes of predictable behavior, and responsive to environmental variations in specific and general conditions, in favorable or unfavorable environments. The objective of this work was to evaluate the adaptability and phenotypic stability of cowpea elite lines of semi-prostrate growth habit in the Cerrado biome in Brazil. Twenty cowpea genotypes of semi-prostrate growth habit were evaluated in nine VCU (value for cultivation and use) tests from 2010 to 2012. Grain yield data were subjected to analysis of variance, and stability and adaptability analyses were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Genotype × Environment Interaction; Grain yield.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000500832

AUTOMATION IRRIGATION SYSTEM WITH MONITORING FROM A WEB APPLICATION
Provedor de dados: 107
Autores: Correia, Gustavo Rissari; Rocha, Helder Roberto de Oliveira; Rissino, Silvia das Dores.
This work presents a proposal to develop a prototype of low cost (Arduino platform) for monitoring and automatic control of irrigation, with remote activation via web application. The work consisted of building physical device (hardware), software (access via the web and Android OS) and field testing. Using open source (open source), automation equipment and remote communication tools. The system also has a set of algorithms that allow the best use of water resources from information collected from sensors embedded in the environment that will be subject to irrigation.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Hídricos e Ambientais agricultura; Android; Arduino; Evapotranspiração; Wireless; Web.
Ano: 2016
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/675

Salicylic acid at beans germination against salt stress
Provedor de dados: 22
Autores: Lima, Julliane Destro de; Dedino, Diego Baraldi; Guedes, Alexandre Teixeira; Rosa, Flavio Lucas da; Lima, Gustavo Oliveira; Lima, Nastassja Kimberlly; Pinheiro, Cassia Renata; Silva, Glacy Jaqueline da.
The common bean (Phaseolus vulgaris L.) is an important legume that is part of the daily food of the brazilians, being important for other countries. Because it is widely cultivated in almost all brasilian regions, is subject to environmental inclemencies, such as saline stress. Salicylic acid (S.A.) is an important plant hormone known to participate in pathways of systemic acquired resistance (SAR) against pathogens and also reported as a participant in the response to abiotic stresses. This study aimed to evaluate the action of salicylic acid prior to saline stress from three different concentrations of sodium chloride at the germination of a Brazilian common bean, cultivar Avaluna. The experiment was designed in randomized blocks, setting a 2x4...
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/20697

Factors that May Lead on the Non-renewal of Certified Organic Product According to Organic Producers in Brazil
Provedor de dados: 123
Autores: Scalco,Andréa Rossi; Oliveira,Sandra Cristina de; Pigatto,Giuliana Santini; Cobre,Juliana.
Abstract: The regulatory process of the organic sector in Brazil began in 1999 and has gone through several changes, culminating in the Decree-Law of December 2007, which established rules for the production and trading of organic products in Brazil. In such Decree, the certification has become a compulsory requirement for production and trading of such products, whose rules governing their obtaining follow rigorous controls standards. As the certification process of organic products is recent and there is a lack of studies carried on this subject, this study will contribute to fill the existing gap in the international literature, mainly national about this topic, once that aimed to identify factors that influence the possibility of non-renewal of organic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Certification; Organic producers; Exploratory factor analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032017000300465

Welfare-friendly Products: availability, labeling and opinion of retailers in Curitiba, Southern Brazil,
Provedor de dados: 123
Autores: Franco,Bruna Maria Remonato; Souza,Ana Paula Oliveira; Molento,Carla Forte Maiolino.
Abstract: The market for welfare-friendly products (WFP) is increasing worldwide; however, there is a lack of information on this topic in Brazil. We investigated availability, product information and opinion of retailers about WFP in Curitiba, Southern Brazil. We visited 36 strategically located retailers, conducting product evaluation and interviews with managers. The availability of WFP, mostly eggs and chicken meat, was low; no other type of meat was available as WFP. Labeling was deficient, with little information about animal rearing systems. Labeling of regular products displaying images of happy animals was observed and may be a relevant confusing effect. Few certification seals for WFP were also observed, on organic products and free-range...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Animal product; Consumer market; Farm animal; Labeling; Product availability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032018000100009

Economic governance of property rights: comparative analysis on the collection of royalties in genetically modified soybean seeds
Provedor de dados: 123
Autores: Monteiro,Guilherme Fowler de Avila; Zylbersztajn,Decio.
This paper examines the governance of property rights on genetically modified (GM) soybean seeds. Specifically, the article undertakes a comparative analysis on the collection of royalties in GM soybean seeds in the U.S. and Brazil. For each country, the authors describe the regulatory framework governing the protection of biotechnology innovations in agriculture and investigate the mechanisms of royalty collection in GM soybean seeds. The paper also offers econometric evidence linking the capture of value on biotech innovations and the protection mechanisms deployed by biotech firms. The results suggest that, subject to the institutional environment, firms may choose to transact a GM attribute separated from the seed, building specialized governance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GM seed; Royalty collection; Property rights; Governance mechanism.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032013000100002

Phylogenetical inferences of five isolates of Leptospira of swine based on 16s and secY genes
Provedor de dados: 195
Autores: Bastos, C. R.; Marulanda, N. D. F.; Jaeger, L. H.; Miranda, V. F. O.; Lilenbaum, W.; Mathias, L. A.
Leptospirosis is a zoonosis responsible for economic and health damage in swine herds. The cultivation and typing of leptospire strains present in one region are still an important subject to bring knowledge for disease control.
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37965

Historical review of experimental infection by leptospiras in ruminants
Provedor de dados: 195
Autores: Ribeiro, B.; Martins, G.; Lilenbaum, W.
Leptospirosis is an infectious diseasecaused by pathogenic spirochetes of the genus Leptospira. It affects domestic and wild animals and is characterized as a zoonotic disease. Leptospiral infectioncauses significant economic losses to livestock, mainly due to abortions, premature births, stillbirths, and weak calf syndrome. The first studies performed on this subject were focused on the observation of the pathological alterations caused by the inoculation of serovar Pomona in cows, reproducing the acute disease,with jaundice, hematuria, fever, and abortions. In other decades, other experimental infections were conducted in ruminants, describing the clinical presentationof the infection by Hardjo and other serovars, with a large variation of the clinical...
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37948

A MULTIVARIATE ANALYSIS OF Boophilus microplus (ACARI: IXODIDAE): NON-PARASITIC PHASE
Provedor de dados: 101
Autores: de la Vega,R; Díaz,G; da Fonseca,A.H.
Multivariate statistical methods are relatively new tools for data analysis. They have a lot of applications in biological researches: nevertheless, for several reasons, they have not been widely employed in this subject yet. Recently, present authors published a paper applying multivariate statistics on non-parasitic phase of Anocentor nitens. In the present article Boophilus microplus has received a very similar statistic treatment. In this paper, the influence of different incubation conditions was studied in groups of 12-15 individuals in each of the 24 combinations of six temperatures 24, 27, 30, 32, 34 and 36ºC and four relative humidity values, 100, 80, 75.5 and 70% over the cycle variables of B. microplus. According to the results, the best...
Tipo: Journal article
Palavras-chave: Ticks; Ixodidae; Boophilus microplus; Multivariate Analysis; Non-parasitic phase.
Ano: 2010
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2010000200004

Morphogeometric variation in Phrynus barbadensis (Pocock, 1893) (Amblypyghi: Phrynidae) from Colombia
Provedor de dados: 99
Autores: TORRES,Richard A.; ATENCIA,Pedro L.; LIRIA,Jonathan.
Amblypygi is a small order of arachnids with features similar to spiders. In Colombia, this order has been subject to low attention, the main investigations are focused towards a taxonomic level. Recently, the geometric morphometrics has proven to be an useful tool for determining shape differences in scorpions and spiders. Due to this, we used geometric morphometrics to determine intraspecific variation in three Colombian populations of Phrynus barbadensis. We digitalized 16 anatomical points over the carapace and 15 in patella by combining landmarks and sliding semilandmarks; the coordinates were aligned by generalized Procrustes analysis. Canonical Variates Analysis was implemented with proportions of re-classifed groups and MANOVA. We found significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conformaron. Intraspecific variation. Procrustes. Whip spiders.
Ano: 2018
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802018000100003

A brief review of soil water, solute transport and regionalized variable analysis
Provedor de dados: 63
Autores: Nielsen,D.R.; Hopmans,J.W.; Kutílek,M.; Wendroth,O.
We initially review basic concepts of the forces acting on soil water, soil water potential and soil water retention, and equations to describe soil water movement under water-saturated and unsaturated conditions. Processes of infiltration, evaporation and redistribution of water will be presented for simple initial and boundary conditions occurring within homogeneous soil columns. Next we consider the physical, chemical and biological processes within a soil profile that distribute, dilute or concentrate solute species within the liquid phase of a soil The relative concentration of solutes in the liquid phase governs not only the retention and transport of water within soils but also contributes to our understanding of managing the quality of water within...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solute transport; Regionalized variable.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300012

Risk of field cultivation of pickling cucumber caused by unfavorable sunshine duration conditions
Provedor de dados: 63
Autores: Kalbarczyk,Robert.
Solar energy, accessible to plants during sunshine from the sunrise to the sunset is of key importance in productivity of agrocenoses. The aim of the work was to determine risk of pickling cucumber cultivation caused by an unfavorable course of sunshine duration in Poland on the basis of a 40-year research period 1966-2005. The research into the subject was undertaken due to frequent occurrence of sunshine deficiency in Poland and its high temporal and spatial variability. Effect of solar conditions described by sunshine duration in the five development stages on the quantity of the total and marketable yield of cucumber with consideration of a linear trend of an independent variable was determined by means of multiple regression analysis. The accuracy of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Development; Growth; Reduction in yield; Solar conditions.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300009

Mapping a hydrophysical soil property through a comparative analysis of local and global scale approximations
Provedor de dados: 63
Autores: Araujo-Carrillo,Gustavo Alfonso; Varón-Ramirez,Viviana Marcela; Gómez-Latorre,Douglas Andrés; Estupiñan-Casallas,Jhon Mauricio; Rodríguez-Roa,Andrea Onelia; Deantonio-Florido,Leidy Yibeth; Martínez-Maldonado,Fabio Ernesto.
ABSTRACT: Current available soil information allows building baselines to improve research, such as sustainable resource management; however, its use requires analysis of accuracy and precision that describes specific variables on local and global scales. Therefore, this study evaluated differences in the spatial distribution of water retention capacity (WRC) of the soil at a depth of 0.3 m, calculated from local general soil surveys and the global gridded soil information system (SoilGrids), using detailed or semi-detailed soil surveys as a reference, in two regions of Colombia (A and B). The qualitative and statistical analyses evaluated differences in WRC surfaces generated by the information sources. Neither information sources described WRC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SoilGrids; Digital soil mapping; General soil study; Water retention capacity.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000201401

Seed vigor testing: an overview of the past, present and future perspective
Provedor de dados: 63
Autores: Marcos Filho,Julio.
The assessment of seed vigor has many important implications to the seed industry as a basic monitoring of seed physiological potential during different phases of seed production and a support for strategic decisions regarding the selection of high quality seedlots to meet the consumer demand. The potential attributes of seed vigor as a fundamental physiological seed characteristic and its association with field stand establishment and crop productivity has been worldwide recognized from the 1960s onward. This led to the diversification of research approaches involving the synchronization of different physiological characteristics and events that determine the potential for high performance during seed storage and after sowing. The basic objective of vigor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed physiology; Seed analysis; Quality control; Physiological potential.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400363

Perfomance of an evaporative cooling system of a finishing phase swine barn
Provedor de dados: 63
Autores: Sartor,Valmir; Baêta,Fernando da Costa; Tinôco,Ilda de Fátima Ferreira; Luz,Maira Luciana.
The thermal environment inside of a finishing phase swine barn has great influence on the success of swine production. This environment can be characterized by the black globe temperature and humidity index (BGHI), that represents the air temperature, humidity, wind speed and radiation. Due to the small number of Brazilian reports on this specific subject, this experiment was performed to verify the effect of one kind of evaporative cooling system on the thermal comfort of the animal in a swine barn, during the 98/99 summer at Patos de Minas, MG, Brazil. Two constructions were used, divided in 36 barns, each one with 15 animals, 110 to 150 days old. Along a side of one barn, four cooling devices were installed, with a ventilation system connected to a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ventilation; Thermal environment; Thermal comfort.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100003

Grapevine leaf water potential based upon near infrared spectroscopy
Provedor de dados: 63
Autores: Santos,Antonio Odair; Kaye,Oren.
Leaf water potential is a measure commonly used to describe crop water status and water stress dynamics. The established method for determining leaf water potential using a pressure chamber is cumbersome and subject to operator error as well as time/temperature limitations. These limitations prohibit the intensive sampling required to support proactive water management of commercial crops, including vineyards. Particular for grapevines there is need for faster, more precise and more reliable tools for determining leaf water potential in the field. Portable Near-infrared spectroscopy and multivariate data analysis were applied for the modeling and prediction of leaf water potential in grapevines. For field-grown wine grapes the most significant and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PLS; Irrigation; Spectrometry; Chemometrics.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300001

Half a century of studying adaptability and stability in maize and soybean in Brazil
Provedor de dados: 63
Autores: Rezende,Wender Santos; Cruz,Cosme Damião; Borém,Aluízio; Rosado,Renato Domiciano Silva.
ABSTRACT: The study of adaptability and stability underlies the cultivar recommendation process for all crops. There is a considerable number of statistical methods available for this purpose, but little is known about their actual adoption by the Brazilian scientific community. The objective of this study was to carry out a systematic review of the scientific literature on the adaptability and stability methods used in maize and soybean in Brazil from scientific articles published between 1970 and 2017 in Brazilian journals. Article searches were carried out in journals indexed through the SciELO database. The articles were classified according to the year of publication and the adaptability and stability methods used. We also evaluated the pattern of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Glycine max (L.) Merril; Genotype × environment interaction; Adaptation; Cultivar recommendation.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300501

'Horologium plantarum'
Provedor de dados: 24
Autores: Linné, Carl von.
Draft of Linnaeus fil.'s dissertation, which was never defended or published, concerning the clock of plants. 'Horologium plantarum' is a hastily written down unfinished draft of Linnaeus fil.'s dissertation. Its content relies on Linnaeus pater's writings, especially "Calendarium florae" (1756) and 'Regnblomman' (GB-110/LM/LP/BOT/6/7), with some additions by Linnaeus fil. who also gives some glimpses of his parents' lives in Uppsala and at Hammarby. Undated, but it is known from a letter from P. J. Bergius to E. G. Lidbeck, 13 July 1756 (at LUB), that Linnaeus fil. planned to submit a thesis on the subject in order to qualify for the demonstrator position at the Uppsala botanical garden. Judging by the quotes from the dissertation "Calendarium florae"...
Tipo: Collection
Ano: 2023

Sir James Edward Smith, Norwich, [Norfolk], to Alexander Macleay, Queen Square, Westminster
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Happy to see Macleay's handwriting, does not complain of him "as of many people for forcing me to write letters, on w[hi]ch subject some people have no discretion". His "whole daylight" devoted to third volume of his "[English] Flora". His health much restored but lost most of his teeth, long account of his recent illness. "Letter-writing is incompatible with Flora-writing", recent progress. Intends to come to London in April or May [1825] after completing third volume. Complains of "puppies chattering about natural orders which they do not understand"; the more that has been done in botany the more mistakes he finds. Hopes to make "some stay" in London, including sitting for [Francis Leggatt] Chantrey [(1781-1841), sculptor] and fulfilling his engagement...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64677/1/JES-AM-174_001.tif

Samuel Goodenough, Berners Street, London, to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Goodenough, Samuel.
Thanks for basket of game. Assures Smith he did not mean to suggest Smith was trying to influence [William Fitt Drake] with his own religious persuasions, and looks upon "any conscientious dissenter as being as good &amp; as religious as any churchman whatsoever". Will join the Linnean Dining Club, proposed by [William George] Maton, [Aylmer Bourke] Lambert and Mr Baker, if it is a "frugal literary dinner, where eating is not the primary object". Fears the plans for it are moving too fast; could not attend a meeting on subject held at the British Coffee House and attended by Maton, [George] Shaw [(1751-1813)], [Joseph] Sabine, and [William] Pilkington [(1758-1848)] as it would be "out of character". Enjoying reading "Lachesis Lapponica" and the greater...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62647/1/JES-COR-11-103_001.tif

'Praelectiones privatae ... in propriam materiam medicam de plantis ... Pars 1'
Provedor de dados: 24
Autores: Linné, Carl von.
Lectures notes from Linnaeus pater's private lectures on medicinal plants. The lectures were delivered in the autumn term of 1754, and Linnaeus fil.'s notes augmented during lectures on the same subject in the autum term 1757. Title page: 'PRAELECTIONES | PRIVATAE | Illustrissimi et Carissimi | Parentis | in | Propriam Materiam Medicam | de Plantis |  Semestri autumnali Anni 1754 | annotatae | a Carolo Linnaeo. Fil.  | Pars 1.  | Aucta melius anno 1757 Hösttermin | a | Carl Linnaeus.' The original notes were paginated by Linnaeus fil. The notes were later interleaved with notes from further lectures attended in 1757 and perhaps later. The order and genera numbers follow Linné, Carl von. 1749. "Materia medica Liber I de plantis". Stockholm. The notes beging...
Tipo: Collection
Ano: 2023

Hugh Davies, Beaumares, Anglesea, to Sir James Edward Smith, Norwich, Norfolk
Provedor de dados: 24
Autores: Davies, Hugh.
Suffering from gout in all his limbs and the "various satellites of old age". Enquires after progress of Smith's "British Flora in English". Asks if Smith has seen his "Welsh Botanography", lists recommended pages. Asks Smith to read the Preface and advise on worth of adding the British or Welsh name to each subject in Smith's work, as [Thomas] Johnson [(c 1600-1644) apothecary] attempted in his edition of [John] Gerard's [(1545-1612) barber-surgeon] ["Herball"] and John Davies' [(c 1567-1644) Welsh lexicographer] "Dictionarium Duplex". A new habitat for 'Serapis ensifolia', found in flower, in May, on Snowdon.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61773/1/JES-COR-4-34_001.tif

Jean Pierre Marie Dana, Turin, [Italy], to James Edward Smith, 12 Great Marlborough Street, London
Provedor de dados: 24
Autores: Dana, Jean Pierre Marie.
Sending Smith eight volumes of the Royal Agricultural Society of Turin via Dr Istria, who is travelling to London with the Marquess of Moss, asks that Smith introduces Istria to the medical establishment. Also sending a dissertation on the propagation of mushrooms, work by Mr Pic and a pamphlet by Mr Bonansea on a new theory on the internal cause of the putrid fever. Has had to postpone sending dried plant specimens. Hopes in future to send the five volumes of the old Royal Academy of Sciences of Turin and the three volumes of the new Royal Academy of Sciences. Thanks Smith for the paper he sent on the "propagation of species" and seeds of 'Smithia' and welcomes his paper on ferns and on any other subject of natural history.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61741/1/JES-COR-4-2_001.tif

Sir James Edward Smith, Norwich, [Norfolk], to Mary Cullum
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Sends on promised "wooden cut" to add to her collection. Suffering from inflammation of the lungs but nearly recovered. Warns Sir Thomas Cullum not to direct anything in "too familiar a style" to his eldest son lest he writes "what will infallibly hang a man", encloses [extant] puzzle on this subject. Just received word of the death of [Thomas] Johnes of Hafod.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62809/1/JES-COR-13-45_001.tif

'Vulcanus docimasticus:': Volume 1
Provedor de dados: 24
Autores: Linné, Carl von.
Contents (page numbers follow Johan Markus Hulth's and Granström's paginations):  Title page:  'Caroli Linnæi | Vulcanus Docimasticus | hvilken föreställer | Proberkonsten | kort doch tydeligen | till des | Instrumenta primaria och secundaria, | materialia simplicia och præparata [written over 'mixta' crossed out] | Processus generales och Speciales | med | cauteler observationer | variationer |  1734. Octobr. Fahlun.'  p. 2 'Catalogus eorum | quorum impensis ab autore conscriptus est vulcanus ha | anno 1734' Follows a list of authors, along with their nationality and their subject of study, and a number.  p. 3-5 'Gunstige Läsare' Preface, signed Carl Linnaeus at the end.  p. 6 'Conspectus operis' in a dichotomous diagram  p 7 later additional notes  p. 11...
Tipo: Collection
Ano: 2023

John Pitchford, Norwich, [Norfolk], to James Edward Smith
Provedor de dados: 24
Autores: Pitchford, John.
Disputes the 'Mentha' Smith and Goodenough determined as 'M. sativa'; convinced that all 'Mentha' can be found both hairy and smooth on the underleaf depending on soil and situation; discussion of other 'Mentha' including 'M. arvensis', 'M. gentilis', M. rotundifolis', 'M. sylvestris', 'M. villosa'; desires to see [Edmund] Davall's specimens and to hear from [William] Hudson on subject. Pleased to hear that [Samuel] Goodenough now concedes that the Linnaeus' 'Carex caespitosa' is the same as the London 'C. caespitosa'. Requests specimen of 'Cerastium alpinum'. Congratulates Smith on escape from fire at the Pantheon, [Oxford Street, London]. [Note on separate piece of paper] an article in January [1792] edition of "Monthly Magazine" proposes an explanation...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64180/1/JES-COR-24-74_001.tif

James Yates, Edgbaston Hall, [Warwickshire], to Sir James Edward Smith, Surrey Street, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Yates, James.
He has never regarded [Thomas William] Coke's marriage "in any other light than as a subject of congratulation" [in 1822 Coke married Lady Anne Amelia Keppel (1803-1844), 50 years his junior]; Coke's warm character. Observations on derivation of 'Nerium'. Expects to visit Dr [John] Bostock in London about 27 May [1822], hopes to also see Smith. Just returned from trip to Liverpool, where he left his father [John Yates (1755-1826), Unitarian minister] and the Martin family [Smith's sister] in good health.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64383/1/JES-COR-26-78_001.tif

Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith, 12 Great Marlborough Street, London
Provedor de dados: 24
Autores: Woodward, Thomas Jenkinson.
Thanks for Smith's hospitality in London. Details of his return journey via Huntingdonshire, including Ripton, Huntingdon, and Bury, where he dined with Sir Thomas Cullum and saw 'Holosteum umbellatum' adorning several thatched houses and 'Vicia lathyroides' near the town. At Cambridge saw 'Arabis turrita' on walls of St John's College. Will shortly be at Yarmouth, [Norfolk], from whence he will send [James] Sowerby 'Cinceraria palustris' and 'Convolvulus soldanella'. At Cambridge found [Richard] Relhan "quite crazy"about the "conjuror of Chalgravis" fern, inserted in appendix to "Flora Cantabrigiensis" under name of 'Acidium from Maller's "Systema"; observations including discussion of letter by Sir Joseph Banks on subject.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63458/1/JES-COR-18-71_001.tif

Dawson Turner, Yarmouth, [Norfolk], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Turner, Dawson.
Apologises for delay in sending Smith the information he requested in his last letter. Transcribes character of 'Ulva plantanginea' ('Tremella marina' of Dillenius) from [Albrecht Wilhelm] Roth's "Catalecta botanica", observations on description. Has written to [Lewis Weston] Dillwyn [(1778-1855), naturalist] on subject of 'Ulva turneri' being published in "English botany", as Dillwyn had intended to publish it in "Linnean Transactions"; thinks it satisfactorily distinct from 'U. fistulosa', and thinks same of Miss Hutchin's 'U. ramulosa' and branched varities of 'U. compressa'; observations. Has never had 'Conferva fibrata' in fruit, and neither drawings nor specimens of 'C. radicans', having given all he had to Dillwyn when he published his "Synopsis"....
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64329/1/JES-COR-26-24_001.tif

James Edward Smith, Paris, [France], to Mrs [Pitchford]
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Responds to Mrs P's letter. Religion "seems to sit very easy upon every body here"; disinclined to judge other people's conduct on the subject, less charity for those who have "scarcely any true principles of religion [and] in private affect to despise all those who have more principle or diffidence". His hatred of Abbés, though knows some exceptions, shocked that people entrust the education of their children to them, when their celibacy means these men cannot be anything but dissolute. General dislike of the ladies of Paris and their painted faces; expects to fall in love with the first English woman he meets on landing, actually felt himself in danger from an English woman he saw in Paris. Nuns who visit the sick make up for the Abbés. Enquired after...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63558/1/JES-COR-19-39_001.tif

James Sowerby, 2 Mead Place, [Lambeth, London], to James Edward Smith, Lowestoft, Suffolk
Provedor de dados: 24
Autores: Sowerby, James.
Just received "Flora Glottiana" and one of [George] Don's "Fasciculi of Dried Plants" for Smith. [William Elford] Leach has been recommended by [Dawson] Turner and [William Jackson] Hooker to get certificates signed by Linnean Society members in support of his candidacy at the British Museum, will add his name if this happens. Transcribes extract from letter by [John Russell, 6th] Duke of Bedford, in which he recommends Smith take up continuation of "Flora Rustica", now that interest in agriculture as a science is well established; his own thoughts on subject. Unable to make out the flowers on Sir Thomas Gage's specimen of 'Trifolium squarrosum', will hope for an earlier gathered specimen next year.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64277/1/JES-COR-25-65_001.tif

DeWitt Clinton, Utica, [New York], to [Sir James Edward Smith]
Provedor de dados: 24
Autores: Clinton, DeWitt.
Sends specimens and grain of a curious species of wild wheat found near Rome, Oneida County, New York, gives a brief description of it and relates how it resists the destructive effects of winter frosts that destroys common wheat, comparing it to rye. Questions whether it is indigenous or originally imported wheat accidently introduced, leans towards the former, with reservations, and gives his reasons, remarking on Linnaeus' six species of 'Triticum', Ceres, Roman goddess of agriculture, and 'Froment tremais'. Is of the opinion that many American native plants have been improperly considered naturalised, is confident in naming the Rome wheat 'Triticum americanum'. Also sends specimens of Wild Rye which grows in parts of the country bordering the upper...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61701/1/JES-COR-3-78_001.tif

John Pitchford to James Edward Smith
Provedor de dados: 24
Autores: Pitchford, John.
Concerned to hear of weak state of [William] Hudson; intends to write to him on subject of 'Mentha villosa', which needs to be "fully cleared up", as does 'M. sylvestris'; observations, including on differences in length of stamina depending on condition; 'M. gentilis'. Thanks Smith for mentioining his name to a Parisian Natural History Society who sent him a prospectus for a new periodical work. Congratulates Smith on appointment as the Queen's [Charlotte of Mecklenburg-Strelitz (1744-1818)] botanist, pleased he will have opportunity to look over [John] Lightfoot's plants; errors for Smith to look out for in his letters to Lightfoot, if they are extant, including on 'Carex' and 'Salix'. Notes on Lightfoot's confounding of 'C. caespitosa' with 'C. recurva'.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64181/1/JES-COR-24-75_001.tif

William Roscoe to James Edward Smith, at Claude Scott Esq MP, London
Provedor de dados: 24
Autores: Roscoe, William.
Gratifiation at herbarium Smith sent to Liverpool [Botanic Garden]; the garden is progressing but he doubts whether botany will "ever make any effectual progress" in Liverpool area. Received letter from [William George] Maton on 'Amomum repens', the true cardamon; agrees with Maton's inclination that from the drawing in [David] White's paper on subject read at Linnean Society it is a new genus, with reference to "Hortus Malabaricus" vol 11 tab 5&amp;6; advises caution until Smith's idea of it being an 'Alpinia' is removed. Hopes Smith is continuing with his 'Scitamineae' research, about which "much remains to be done"; they have many at the Botanic Garden but they rarely flower. Anxious about Smith's brother.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63298/1/JES-COR-17-67_001.tif

William Roscoe, Liverpool, [Lancashire], to Sir James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Roscoe, William.
Thanks for Smith's congratulations and refers him to Mr Martin [Smith's brother-in-law] for all information on subject [presumably a recovery in his affairs]. A reconciliation has occured between them and their friends at Greenbank, renewing friendship of 30 years. Everything Smith said of [Thomas William Coke] has been fulfilled, and still hopes to meet Smith at Holkham, [Norfolk, Coke's home]. His studies and pursuits have been interrupted by the dispersal of his library, though he has long suspected that collecting literary and artistic curiosities has an unfavourable effect on original efforts, and now plans to focus on several unfinished labours.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63337/1/JES-COR-17-106_001.tif

Sir James Edward Smith, Norwich, [Norfolk], to Samuel Goodenough
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Thanks for barrel of oysters. Steadily working on his "English Flora" and hopes to get it to the press in May; expects it to be "quite an original Flora" as he has been revising the whole subject and correcting mistakes made by previous writers and compilers. Asks Goodenough's advice regarding accenting of names and whether to give derivation of generic names. The whole object of the book is "botanical determination". Asks Goodenough's opinion of the "green old age" of [Thomas William] Coke [on 26 February 1822 Coke married for the second time Lady Anne Amelia Keppel (1803-1844), fifty years his junior]. Smith hopes he has done some good with the grasses and triandria monogynia, with which [Robert] Brown is "very great" but refines too much.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62726/1/JES-COR-12-73_001.tif

William Roxburgh, Cape of Good Hope, [South Africa], to James Edward Smith
Provedor de dados: 24
Autores: Roxburgh, William.
Last wrote by Mr Brown, surgeon of the Albion, in December; hopes Smith received the seeds, specimens, and insects. Arrived at the Cape a few days ago; sending his son, George, to England under care of a surgeon from Bengal Establishment. Requests Smith's assistance in getting his son, William [(fl 1780s-1810)], who has been studying in Edinburgh, a place as a writer in Bengal Establishment, otherwise to have him appointed his botanical assistant; would write to [Aylmer Bourke] Lambert on subject but does not have an introduction. His health suffered during the voyage but now feels recovered; intends to remain 6 or 8 months, or until William and his sister arrive. Sends box of insects, including many 'Phalena paphia', which yields a large quantity of...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64226/1/JES-COR-25-14_001.tif

Pharmacology: Fragmentary lecture notes
Provedor de dados: 24
Autores: Linné, Carl von.
Three sets of fragments from lecture notes on 'Materia medica':  - 'jag senast...' (1 fol.). This fragment was initially kept with LM/LF/MED/3/7, with the introductory notes. As a note from Arvid H. Uggla indicates, it did not fit with the rest of the lectures, but is clearly from a lecture given by Linnaeus fil. on the subject of 'Materia medica' related to medicinal plants, in the late 1770s.  - '219 Asarum' (28 ff.). This fragment was kept with the 1777-1778 lecture notes (also LM/LF/MED/3/7) and was pulled out as it is an earlier set of notes from Linnaeus pater's lectures on 'Materia medica'. Each set of pages is headed by the genus name and number from Linné, Carl von. 1749. "Materia medica Liber I de plantis". Stockholm. The format corresponds to...
Tipo: Collection
Ano: 2023

Samuel Goodenough, Berners Street, [London], to Sir James Edward Smith
Provedor de dados: 24
Autores: Goodenough, Samuel.
Compliments Smith's "Grammar of Botany"; believes Smith, Corrêa, and [Robert] Brown only botanists skilled enough to tackle the subject and and Smith the only one to successfully tackle it. [Francisco Antonio] Zea and General Cortes attended the most recent Linnean dinner, "both rather mean looking men". Attended Sir Humphry Davy's conversazione, Captain [William] Parry [(1790-1855), Arctic explorer] also attended, he is writing his book in the country ["Journal of a Voyage to Discover the Northwest Passage" (1821)]. Attended Royal Society dinner and beginning of Antiquarian Society meeting; there was "a ponderous dull paper upon weights and measures" by Captain Kater. Davy a clearer orator than the Antiquarians' president, Lord Aberdeen [George...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62720/1/JES-COR-12-67_001.tif

'Diaeta naturalis'
Provedor de dados: 24
Autores: Linné, Carl von.
Manuscript on dietetics, written in several instalments at at least two different periods of Linnaeus's life: in 1733, and after his return from the continent in 1738.  'Diaeta naturalis' owes a great deal to Linnaeus's tour of Lapland in 1732, where he observed the Lapps' healthier way of living, in an undisturbed natural environment. The manuscript was started a year later for Linnaeus's private tuitions on dietetics and the natural way of living. 'Diaeta naturalis' was left unfinished. The last stage of the manuscript can be dated from the beginning of the other manuscript on dietetics, 'Lachesis naturalis', which Linnaeus begun when he started lecturing on the subject. 'Lachesis naturalis' is mostly based on 'Diaeta naturalis', and consequently much of...
Tipo: Collection
Ano: 2023

Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith
Provedor de dados: 24
Autores: Woodward, Thomas Jenkinson.
Thanks for ["Compendium florae Britannicae"]; praises Smith's writing and "unassuming display of knowledge", which is the opposite of modern authors, who "promise mountains, &amp; very often produce not even molehills". Recently suffered from gout in his left hand. Sending copy of rare [John] Ray work after noticing scarcity of his works in Linnean Society library catalogue [see RelatedMaterial below]. Difficulty of acquiring good specimens of 'Lichen tenuissimus' to send [John] Pitchford after the banks of it were so "thoroughly pillaged" by Dawson Turner and Dr Nöder; observations. Glad Smith liked his pamphlet of letters [subject unclear].
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63506/1/JES-COR-18-119_001.tif

Thomas Martyn, Pertenhall, [Bedfordshire], to James Edward Smith, Old Hummum, Covent Garden, London
Provedor de dados: 24
Autores: Martyn, Thomas.
Smith's candidature for Professorship at Cambridge University. Offers to write to the Vice-Chancellor of Cambridge [William Chafy (1779-1843) vice-chancellor 1813 &amp; 1829] in support of Smith's candidature. Warns of impediments: the lecture room has been given up to Dr Clarke, Professor of Mineralogy, and a lack of interest in the subject meant [Richard] Relhan had difficulties making up a class when he lectured on botany. Although has no intention of retiring concedes the possibility of being incapacitated. Discusses other candidates and the university establishment, explains the three components of his position (University Professorship, Walkerian lectureship attached to Botanic Garden, and Regius Professorship) and suggests a course of action: if...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62105/1/JES-COR-7-7_001.tif

William Roscoe, Liverpool, [Lancashire], to James Edward Smith, Old Hummums, Covent Garden, London
Provedor de dados: 24
Autores: Roscoe, William.
Mr Martin [Smith's brother-in-law] remains "very lame" and will have a long recovery but his general health is good. [Liverpool Botanic] Garden going on well. [John] Shepherd [(c 1764-1836, curator Liverpool Botanic Garden] intends to send Smith a curious 'Cryptogamian' plant via John Fraser [(c 1750-1811), botanist], who has just returned from a 3 year expedition in America with thousands of new and valuable plants; they are being sent to Chelsea via canals; Fraser spoke warmly of Smith. Considering writing botanical paper on "a subject so critical that no one else dare venture upon it" [comparison of systems of Linnaeus and Jussieu], which will complete his public image as being "heretic in religion, a sceptic in history, a malcontent in politics";...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63300/1/JES-COR-17-69_001.tif

Thomas Jenkinson Woodward, Bungay, [Suffolk], to James Edward Smith, 12 Great Marlborough Street, London
Provedor de dados: 24
Autores: Woodward, Thomas Jenkinson.
Thanks for parcel and "Icones [pictae]"; spirit of the work "seems well kept up". Discusses Linnaeus' classification of 'Fucus foeniculaceus' and 'F. abrotanifolius' in his publications; his and [Samuel] Goodenough's paper on the subject; requests to see the Linnaean specimens. Received message and packet of grass seeds from [Edmund] Davall via Mr Forster, brother of the master of Norwich school. Requests a Sierra Leone penny for Mrs Woodward's collection. Requests Smith's to bring his "Tour" and "Linnean Transactions" vol 2. List of queries for Smith to resolve if he cannot bring the Linnaean 'Fucus' specimens [annotated "sic in HL" by Smith].
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63464/1/JES-COR-18-77_001.tif

Robert Brown, 9 Gerrard Street, Soho, [London], to James Edward Smith
Provedor de dados: 24
Autores: Brown, Robert.
Questions for Smith on papers he wrote on New Holland [Australian] plants in ninth volume of "Linnean Transactions". Believes 'Conchium congifolium' is the same as 'Conchium pugioniforme', opinions on 'Conchium sphaeroideum' and 'Conchium compressum'. Believes Smith's 'Gompholobium maculatum', described under 'Gompholobium scabrum', is a distinct species as comprehended under Linnaeus's 'Sophora genistoides'. Believes 'Bossiaea ovata' may be 'Bossiaea heterophylla'. Questions appropriateness of 'Scolopendrium' as a name. Thanks Smith for answers his on 'Protea', his developments, has finished his paper on the subject. Comments on paucity of botanical matters in other journals. Remarks on a paper read by [David] White on the Malabar 'Cardamom' which Brown...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61565/1/JES-COR-2-91_001.tif

James Edward Smith, Edinburgh, to Thomas Jenkinson Woodward, Bungay, Suffolk
Provedor de dados: 24
Autores: Smith, Sir James Edward.
Thanks Woodward for his "excellent" drawing of 'Lycoperdon coliforme'; discusses other species including 'L. pedunculatum' and 'L. fraxineum'. Sorry Charles Bryant [(d 1799)] is publishing "his folly &amp; obstinacy to the world"; intends to defer his own paper on the subject. Found 'Lycoperdon stellatum'; his observations, and a new species he is calling 'L. fragile'; definition. Recently spent two months in Yorkshire and Westmoreland; found many lichens, sent some to [John] Pitchford. Planning an expedition to Loch Lomond, Ben Lomond, Taymouth, Blair, and Dunkeld. His future plans: will spend time in Norwich and London, graduate, and undertake a tour of Europe. Dr [John] Walker [(1731-1803), Scottish minister and natural historian] has found plants in...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63390/1/JES-COR-18-3_001.tif

The virtual crop-modelling system 'VICA' specified for barley
Provedor de dados: 26
Autores: Wernecke, P.; Müller, J.; Dornbusch, T.; Wernecke, A.; Diepenbrock, W.
The paper presents an improved version of the Virtual Canopy model VICA (Wernecke et al. 2000), which is developed to establish a generic functional-structural plant model (FSPM; cf. Vos et al. this volume) specified for barley (Hordeum vulgare L.). The model core is formulated as a set of hierarchically structured objects. These objects are related to morphological and functional ‘plant units’ (organs). The following processes are considered: i) organ initiation, ii) organ growth and senescence, iii) photon transfer, iv) photosynthesis, v) basic features of the carbon (C), and nitrogen (N) metabolism, and vi) mass fluxes between objects. Balance equations are defined for three different substrate classes with their mobile and immobile forms: i) substrates...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1371

Richness and diversity of aphids (Homoptera, Aphididae) along an altitudinal gradient in the Serra do Mar, Paraná, Brazil
Provedor de dados: 104
Autores: Lazzarotto,Crisleide Maria; Lázzari,Sonia Maria Noemberg.
The lack of bioecological studies on aphids in regions with complex floristic and faunistic structure, such as the Atlantic Tropical Rain Forest, lead to the initiation of this research. The objectives were to determine species richness and diversity of aphids and to investigate the influence of altitude and environmental perturbations on aphid populations. The collections were made with yellow pan traps at 11 sites with altitudes from -10 m to 1000 m above sea level (a.s.l.), in the Serra do Mar, Paraná, Brazil, from December 1993 to December 1994. Richness and diversity of aphids were greatest at 85 m a.s.l. This site was characterized by three distinct floral communities: primary vegetation, secondaiy vegetation in successional stages, and secondary...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aphids; Diversity; Equitability; Richness; Altitude.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400016

Critical thermal maxima and minima of the platyfish Xiphophorus maculatus Günther (Poecillidae, Cyprinodontiformes): a tropical species of ornamental freshwater fish
Provedor de dados: 104
Autores: Prodocimo,Viviane; Freire,Carolina Arruda.
Temperature as an environmental factor has been a frequent subject of study, since it affects either directly or indirectly all living organisms. The determination of thermal limits (critical thermal minima - CTmin and maxima - CTmax) for the tropical ornamental freshwater teleost Xiphophorus maculatus Günther, 1866 (platyfish) was performed after their acclimation to the following temperatures: 15, 20, 25, and 30ºC, for seven days. After this period, the water temperature was elevated or reduced at a rate of 0.125ºC/min until CTmax and CTmin could be determined as the temperature at which 50% of the animals had lost equilibrium. Mean values for CTmax and CTmin for the acclimation temperatures of 15, 20, 25, and 30ºC were respectively:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Xiphophorus maculatus; Temperature; Critical thermal maxima and minima; Acclimation; Platyfish.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500007

The benthic macroinvertebrate fauna of highland streams in southern Brazil: composition, diversity and structure
Provedor de dados: 104
Autores: Buckup,Ludwig; Bueno,Alessandra A. P.; Bond-Buckup,Georgina; Casagrande,Marcelo; Majolo,Fabiane.
Benthic macroinvertebrate in four rivers, three in the Pelotas River basin (Divisa, Marco and Silveira rivers, in the headwaters of the Uruguai River) and one in the Taquari-Antas system (Antas River), a tributary in the Guaíba basin, in the state of Rio Grande do Sul, were identified. Two samples were collected in summer, autumn and spring, with one replicate in each river. The total of 28,961 specimens included members of Platyhelminthes, Annelida, Acarina, Insecta, Crustacea and Mollusca. The Silveira and Marco rivers showed significant differences in the indices of Shannon-Weaver (H’), Simpson’s Reciprocal (1/D), Margalef (DMg) and Equitability (E). The Silveira River showed the highest means of diversity and the EPT index (Ephemeroptera, Plecoptera,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic invertebrates; Community structure; Diversity indices; Rio Grande do Sul.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200005

Ultrastructural analysis of the shells of Anodontites trapesialis (Lamarck) and Anodontites elongatus (Swaison) (Mollusca, Bivalvia, Etherioidea) from the Mato Grosso Pantanal Region, Brazil
Provedor de dados: 104
Autores: Callil,Claudia T.; Mansur,Maria C. D.
Based on optical and SEM microscopic observations, the projections of the outer surface of the periostracum and inner micro-structures of the shell are described and redefined. The outer surface of the periostracum is practically smooth in both species. Considering a mesoscopic view of the periostracum, A. trapesialis (Lamarck, 1819) presents regular corrugations in the form of radial sequences of arches on the disk region, isolated rays or horizontal sequences of rays on the anterior lower region. A. elongatus presents corrugations formed by series of oblique arches on the disc and oblique rays on the carina. Under SEM, micro ridges were more evident in A. elongatus, but a wide diversity of shapes and patterns of micro fringes were observed in A....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycetopodidae; Periostracum projections; Shell layers.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000300033

A morphometric analysis of Eunice Cuvier (Annelida, Polychaeta) species
Provedor de dados: 104
Autores: Costa-Paiva,Elisa M.; Paiva,Paulo C.
Morphology has been the subject of several studies in Eunice specially in the context of the taxonomy and evolutionary relationships of taxa within this genus. In this study we opt for a morphometric approach comparing five species of Eunice to assess if it was possible to delimitate them by shape variables. The morphology of E.fucata, E.insularis, E. cf. ornata, E.rubra, and Eunice sp. was compared using traditional morphometric analysis of 16 measured variables. After removing the size-effect, a Canonical Variates Analysis applied to morphometric variables was able to discriminate all species. In CV1 two major groups of species were discriminated: E.fucata/E.insularis and E. cf. ornata/E.rubra/Eunice sp. CV2 strongly discriminated all species, with E....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body-size; Eunicid; Morphometry; Multivariate analysis; Taxonomy.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200013

Morcegos (Chiroptera) da área urbana de Londrina, Paraná, Brasil
Provedor de dados: 104
Autores: Reis,Nélio Roberto dos; Lima,Isaac Passos de; Peracchi,Adriano Lúcio.
Study carried out within the urban perimeter of Londrina, which is located in the North of the state of Paraná. The objectives were the identification of urban species of bats and diurnal roosts used by them and the verification of the problems they can cause to the population. The fire brigade, the Autarquia Municipal do Ambiente de Londrina (Municipal Environment Autarchy of Londrina), the Biology Department of the Universidade Estadual de Londrina (State University of Londrina) and local residents helped spot the roosts. The collections were carried out in regular intervals between April 1998 and March 1999. By the end of them, 815 bats of 23 different species had been captured. Among these, 12 were found near or inside human constructions: Noctilio...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chiroptera; Bats; Urban bats.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300011

In vitro propagation of avocado (Persea americana Mill.) cv. Hass through morphogenesis
Provedor de dados: 109
Autores: Restrepo Osorio,Catalina; Gómez Velásquez,Felipe Andrés; Gil Correal,Alejandro; Torres Bonilla,Javier Mauricio; Urrea Trujillo,Aura Inés.
Abstract Given the importance and potential development of avocado (Persea americana Mill.) cultivation in Colombia and its problems for an efficient field cultivation, which includes the genetic variability of propagated material and adverse phytosanitary conditions, the aim of this study was to develop a method for in vitro clonal propagation for avocado cv. Hass. In vitro introduction of apical explants and nodal segments was carried out from grafted parent plants. Etiolation pretreatment effect on the number of shoots formed and in vitro phenolization was evaluated in grafted parent plants and in explants under in vitro conditions, subject to photoperiod (12/12 hours) and darkness. Darkness conditions reduced significantly plant phenolization, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acclimatization; Etiolation; Greenhouse; In vitro; Photoperiodicity; Plant propagation; Rooting.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100160

Phytogeographic support tor the theory of Pleistocene forest refuges in the Amazon Basin, based on evidence from distribution patterns in Caryocaraceae, Chrysobalanaceae, Dichapetalaceae and Lecythidaceae
Provedor de dados: 36
Autores: Prance,Ghillean T.
Abstract In recent years it has generally been accepted that Amazonia was subject to long dry periods in the late Pleistocene and post-Pleistocene which induced forest cover to a few limited areas or refuges. It has been proposed that the subsequent genetic isolation into separate populations is a mnjor factor in the evolution of the species diversity within the lowland forest of Amazonia. Most of the previous evidence for this theory is based on studies of animals, for example: lizards, butterflies, and birds. Here data are presented to confirm the theory of forest refuges using evidence from phytogeography. Distribution patterns of the lowland species of the woody plant families Caryocaraceae, Chrysobalanaceae, Dichapetalaceae and Lecythidaceae are...
Ano: 1973
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671973000300005

Spatial and temporal evolution of family-farming land use in the Tapajós region of the Brazilian Amazon
Provedor de dados: 36
Autores: ROZON,Christine; LUCOTTE,Marc; DAVIDSON,Robert; PAQUET,Serge; OESTREICHER,Jordan Sky; MERTENS,Frédéric; PASSOS,Carlos José SOUSA; ROMANA,Christine.
Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in the state of Pará. We contrast 11 watersheds that are generally representative of the colonization dynamics in the region. For this purpose, Landsat satellite images from three different years, 1986, 2001, and 2009, were analyzed with Geographic Information Systems. Individual images were subject to an unsupervised classification using the Maximum Likelihood Classification algorithm available on GRASS. The classes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deforestation; Watershed scale; Landsat Satellite Images; Cities; Roads.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200203

GENETICALLY MODIFIED FOOD CROPS AND PUBLIC HEALTH
Provedor de dados: 37
Autores: ACOSTA,ORLANDO; CHAPARRO,ALEJANDRO.
The progress made in plant biotechnology has provided an opportunity to new food crops being developed having desirable traits for improving crop yield, reducing the use of agrochemicals and adding nutritional properties to staple crops. However, genetically modified (GM) crops have become a subject of intense debate in which opponents argue that GM crops represent a threat to individual freedom, the environment, public health and traditional economies. Despite the advances in food crop agriculture, the current world situation is still characterised by massive hunger and chronic malnutrition, representing a major public health problem. Biofortified GM crops have been considered an important and complementary strategy for delivering naturally-fortified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofortification; Genetically modified food; Public health; Risk assessment.
Ano: 2008
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2008000300001

Effect of flooding on survival and initial growth of Ocotea pulchella (Nees) Mez. seedlings in semi-controlled light conditions
Provedor de dados: 39
Autores: Pires,Luciana Andrea; Cardoso,Victor José Mendes.
Taking into account the occurrence of Ocotea pulchella in areas subjected to periodic flooding, this work aimed to evaluate the survival and initial development of Ocotea pulchella seedlings (2 months old) and juveniles (9 months old) in response to waterlogging under different light regimes by varying both light quantity and light quality, in order to test for possible flood tolerance of the species as affected by light conditions. Three levels of soil moisture (field capacity, mean flooding - only for seedlings - and full flooding) and four light treatments (full sun, neutral shade, far red enriched shading and neutral plus far red) were tested. The survival of seedlings and juveniles during one year was relatively high, whereas growth was negatively...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Restinga forest; Juveniles; Waterlogging; Development.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200019

Pollen has higher water content when dispersed in a tricellular state than in a bicellular state
Provedor de dados: 39
Autores: Williams,Joseph H.; Brown,Chandler D.
ABSTRACT Pollen is generally dispersed in a sexually immature and somewhat dehydrated, metabolically quiescent state. Yet, in some species, pollen at anthesis is well-hydrated and metabolically active, and in 30 % of angiosperms pollen is dispersed after having formed its sperm cells. Pollen water content and sexual maturity may be correlated, either because both are subject to trade-offs between dispersal viability and post-pollination performance, or because the traits display developmental linkages. We inferred relative water content of sexually immature (“bicellular”) and sexually mature (“tricellular”) pollen of 30 species of angiosperms using a hydration index (HI) that ranges from zero to one, based on how near fresh pollen volume is to its minimal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Desiccation stress; Evolution of development; Pollen dispersal; Pollen germination; Pollen hydration; Spore dormancy; Trade-off.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300454

Characterisation of Sanguinhal Mire, Terceira Island (Azores): a protected quaking bog habitat
Provedor de dados: 39
Autores: Mendes,Cândida; Dias,Eduardo.
The Azores archipelago in the North Atlantic is an important area for biodiversity because it is rich in rare species and habitats, and almost undisturbed. Sanguinhal mire was originally a lake that evolved through paludification into a peat habitat. It is located inside Nature 2000 (European Union for Protection of Nature and Biodiversity, Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora, Habitat Directive Annex I(b) habitat 7140) area of Santa Bárbara and Pico Alto Mountains on the island of Terceira, and it is a good example of a basin peatland type that was first discovered in 1998. This paper provides baseline information on its flora, vegetation communities, structure, surface hydrology...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conductivity; European Habitats Directive; Hydrology; PH; Vegetation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300022

Seed bank composition in a secondary forest in the Lower Delta of the Paraná River (Argentina)
Provedor de dados: 39
Autores: Kalesnik,Fábio; Sirolli,Horacio; Collantes,Marta.
The native forests once occupying the coastal levees of the Lower Delta islands of the Paraná River (in Argentina) have been replaced by commercial forests. Many of those forests have been abandoned, resulting in secondary forest formation that is subject to numerous invasive exotic species. A priori observations suggest that successional trends do not lead to recovery of the original forest. The aim of the present study was to analyze the role of invasive exotic species in these environments and the likelihood of recovery of the original forest cover. Therefore, we examined the composition of the seed bank and of the standing vegetation, as well as the population structure of tree species. Secondary forests are described as being in an intermediate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chinese privet (Ligustrum sinense); Invasive species; Post-abandonment regeneration; Riparian forest; Seedling emergence.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100006

Scientometrical review of Dinoflagellate studies in Brazil
Provedor de dados: 39
Autores: Noga,Pietro Martins Barbosa; Gomes,Doriedson Ferreira.
ABSTRACT Scientific production in developing countries is currently increasing, but there is still an unbalanced distribution of scientific production between developed and developing countries. With the need to elucidate disparities in scientific production, this paper aims to review publications on dinoflagellates in Brazil by discussing spatial and temporal trends. A search for papers referring to dinoflagellates was performed in the Scopus database up to the year of 2016. A total of 125 papers were found, but only 106 were selected according to established criteria. A linear regression was used to evaluate the increasing temporal trend in production and non-parametric ANOVA for comparisons among study categories. Dinoflagellate and toxic taxa-based...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dinophyta; Harmful algae blooms; Phytoplankton; Public investments; Scientometry.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400503

Allelopathic research in Brazil
Provedor de dados: 39
Autores: Reigosa,Manuel; Gomes,Anabele Stefânia; Ferreira,Alfredo Gui; Borghetti,Fabian.
In this article, we review allelopathy studies conducted in Brazil or involving plant species that occur in the country. Conceptions and misconceptions associated with allelopathy, as well as some international criteria to be applied in allelopathic research, are presented and discussed. We observed a sharp increase in the number of papers on this subject conducted in Brazil between 1991 and 2010. However, most studies are conducted under laboratory conditions, lack a clear hypothesis or a solid justification, and typically make use of target species that do not co-exist with the donor species under natural conditions. We also found that most studies do not take the additional steps in order to purify and identify the bioactive molecules. We recommend that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Allelochemicals; Competition; Interference; Phytotoxicity; Weed control.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400001

The effects of fragmentation on Araucaria forest: analysis of the fern and lycophyte communities at sites subject to different edge conditions
Provedor de dados: 39
Autores: Silva,Vinícius Leão da; Schmitt,Jairo Lizandro.
Edge effects impact species richness and composition as a result of environmental changes caused by fragmentation. This study analyzed edge effects on a community of terrestrial ferns and lycophytes in an Araucaria forest in Brazil at sites subjected to differing edge conditions: (1) a site bordering a road running through the interior of a conservation unit, and (2) a site bordering an agricultural property. Twelve 10 × 10 m plots were selected at the edge and in the interior of each site, and accounted for a total of 48 plots. The edges had lost their characteristic floristic identity, suggesting that many species are sensitive to variations in environmental conditions. The edge effect had a negative impact on species richness as shown by the greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Edge effect; Environmental change; Microclimate; Mixed rain forest; Soil.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200223

Disentangling plant establishment in sandy coastal systems: biotic and abiotic factors that determine Allagoptera arenaria (Arecaceae) germination
Provedor de dados: 39
Autores: Menezes,Luis Fernando Tavares de; Pugnaire,Francisco I.; Matallana,Gloria; Nettesheim,Felipe Cito; Carvalho,Daniel Costa de; Mattos,Eduardo Arcoverde de.
ABSTRACT Germination rate and establishment success of plants in harsh environments depend on the ability of seeds to withstand unfavorable environmental conditions and avoid predators. Brazilian coastal plains, known as restinga, are subject to environmental factors that seriously limit plant establishment and survival (e.g. salinity, desiccation, oligotrophy, flooding, high temperature and radiation levels). We tested, both in field and laboratory experiments, conditions for germination and establishment of Allagoptera arenaria, a palm tree often found in restinga ecosystems of southeastern Brazil, and which have a principal role in plant community dynamics. Our results showed that the absence of mesocarp, high radiation exposure, and temperature were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arecaceae; Facilitation; Resting; Secondary dispersion; Seedling.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100012

Do the structures of macaw palm fruit protect seeds in a fire-prone environment?
Provedor de dados: 39
Autores: Bicalho,Elisa Monteze; Rosa,Bruno Luan; Souza,Anna Elisa de; Rios,Camilla Oliveira; Pereira,Eduardo Gusmão.
ABSTRACT Fire is an abiotic disturbance that regulates vegetation structure and biodiversity. Some plant species have adapted to fire prone environments by evolving protective structures. Acrocomia aculeata (macaw palm) is widely distributed throughout tropical America, and is found in environments continuously influenced by anthropogenic fire. We aimed to determine whether the fruit characteristics of A. aculeata enable seeds to resist the effects of fire and also the consequent effects of fire on fruit biometric traits and embryo viability. After a fire event in a region of pasture-forest transition, we marked 30 individuals of A. aculeata. The trees were separated by UPGMA analysis into 5 groups according to fire exposure, ranging from trees with no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acrocomia aculeata; Biometry; Burning; Climate change; Seed viability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000400540

Galling insects are bioindicators of environmental quality in a Conservation Unit
Provedor de dados: 39
Autores: Santana,André Portugal; Isaias,Rosy Mary dos Santos.
Galls are well distributed across the World and among plant families. Their diversity can support the status of conservation of an area as an urban park, once inventories are presented. These inventories also help to understand the morphological patterns of the galls, based on their most common shape, color, host botanical families, inducers and galled organs. This study is about an inventory of galls at Parque Estadual Serra Verde, Brazil. This conservation unit is an urban park strongly anthropized in a transition area of Cerrado and Mata Atlântica. Galls from four different trails were observed, and collected monthly during one year. The terminology morphospecies was used to distinguish the galls because the identification of the inducers were not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Conservation unit; Galling insects; Inventory; Neotropical galls.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400014

What matters in free listing? A probabilistic interpretation of the salience index
Provedor de dados: 39
Autores: Chaves,Leonardo da Silva; Nascimento,André Luiz Borba do; Albuquerque,Ulysses Paulino.
ABSTRACT Free listing is a data collection technique used in different subject areas to characterize a given cultural domain. Analysis of a set of lists from a human population allows inferences to be made about the cultural salience of the items in that domain. However, the challenge that the salience index presents is establishing a threshold value for determining whether an item can be considered salient or not. The present analysis reveals how to determine which items of a list have non-randomly determined citation frequency and order. Monte Carlo techniques were used to create a hypothetical null scenario. The present analysis not only objectively identifies which items stand out in relation to the others, it also reveals which items can be considered...
Palavras-chave: Cognitive anthropology; Ethnobiology; Ethnobotany; Free-list; Human ecology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000200360

Nutrient retranslocation in forest species in the Brazilian Amazon
Provedor de dados: 1
Autores: Machado, Murilo Rezende; Sampaio, Paulo de Tarso Barbosa; Ferraz, João; Camara, Rodrigo; Pereira, Marcos Gervasio.
Internal retranslocation is an important mechanism for nutrient conservation in plants, which depends on different factors. However, there are little data about this subject, especially on tropical forest species. This study aimed to evaluate the macronutrient retranslocation dynamic and the influence of ecological (P: pioneer x NP: non-pioneer) and phenological (ND: non-deciduous x D: semideciduous / deciduous) characteristics on the macronutrient content of leaves of five tree species on monospecific plantations in the Brazilian Amazon: Acacia mangium Willd., Parkia decussata Ducke, Dipteryx odorata (Aublet) Willd., Jacaranda copaia (Aubl.) D. Don and Swietenia macrophylla King. Photosynthetically active green leaves and senescent leaves (leaf litter)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.00.00.00-4 ecological groups; Litterfall; Nutrient cycling; Phenological groups; Plant nutrition Fertilidade do Solo e Adubação.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26805

Trends in the scientific production on aquatic microhabitats phytotelmata: a scientometric study
Provedor de dados: 3
Autores: Teixeira, Ana Paula; Silva, Paulo Fernandes Roges Souza; Souza, João Paulo Francisco de; Alves, Natália Lopes; Guimarães, Ariane; Carneiro, Fernanda Melo.
We performed a scientometry to validate trends in the scientific production on phytotelmata and the importance of these microenvironments in the maintenance of biodiversity. We searched for articles in the Web of Science and looked at publications from 1987 to 2016. We collected years of publication, surveyed organisms, countries where the surveys took place, plants that accumulate phytotelmata, scientific journals that publish more about the topic and their respective IFs (Impact Factor) and the keywords of each article. We built a heatmap using the most frequent keywords in the studies, to investigate the topics studied over the years. We have found 293 publications, increasing over the years. Insects, anurans and crustaceans were the most studied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromeliads; Scientometry; Insect-plant interaction; Tank plants; Microenvironments.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/40994

Fish welfare: the state of science by scientometrical analysis
Provedor de dados: 3
Autores: Ghisi, Nédia de Castilhos; Oliveira, Elton Celton de.
 In 2014, Brazil produced 474.33 thousand tons of captive-bred fish. In addition, regulatory agencies of animal ethics and welfare have recently encouraged experiments to be done using simpler vertebrates, such as fish. The aim of this article was to perform a scientometric analysis of scientific production that deals with fish welfare, in an attempt to find trends and gaps in this line of research. Our analyses showed a growing concern about fish welfare, although several questions remained inadequately covered. The most studied species was the Atlantic salmon, with Norway having the most publications on this theme. There are controversies among scientists about fish capacity for suffering and enjoyment (sentience). As regards slaughter or euthanasia,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.04.06.02-9 suffering; Pain; Euthanasia; Stress; Humane slaughter Utilização dos Animais.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31785

Glossary of Terms on Animal Housing: Interconnecting Engineering, Physical and Physiological Definitions
Provedor de dados: 111
Autores: Panagiotis Panagakis; Assistant Professor, Agricultural University of Athens; Victoria Blanes-Vidal; University of Southern Denmark, Faculty of Engineering; Thomas Banhazi; South Australian Research and Development Institute, University of Adelaide; Jose Carlos Barbosa; Polytechnic Institute of Bragança, Dept. of Agriculture and Agricultural Engineering; Ephraim Maltz; Dept. of Growing Production and Environmental Engineering, Institute of Agricultural Engineering, Agricultural Research Organization, The Volcani Center, Bet Dagan; Vasco Da Cruz; University of Evora, Dept. of Agricultural Engineering, Evora; Daniel Berckmans; M3-BIORES: Measure, Model &amp; Manage Bioresponses, Katholieke Universiteit Leuven.
Animal Housing is a multidisciplinary scientific area that requires the establishment and use of a standardized vocabulary that provides consistency and reduces misunderstandings among scientists with diverse background or Nationality. A first report-dictionary entitled ‘Glossary of Terms on Animal Housing: Basic Engineering, Physical and Physiological Definitions’ has been prepared within the framework of Working Group ‘Animal Housing in Hot Climate’ established under CIGR - Section II. The glossary makes reference to Engineering, Thermal Biology and Environmental Physiology disciplines and it aims at (1) setting-up uniformity in Animal Housing terms pertaining to climatization field of study and to (2) serve as a focal point for the development of...
Ano: 2009
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1302

Predicting Failure Rate in Different Maintenance Conditions for MF 399 Tractor, a case study in southwest of Iran
Provedor de dados: 111
Autores: Afsharnia, Fatemeh.
The use of tractors for agricultural works showed an important role to mechanized agricultural sector. A repairable mechanical system (as agricultural tractor) is subject to deterioration or repeated failure. In this study, the regression model was used to predict the failure rate of MF399 tractor. The machine failure pattern was carefully studied and key factors affecting the failure rate were identified in five regions of Khouzestan province. Results showed that different annual use hours and maintenance policies affected failure rate. According to the data, the MF399 tractors included in 300-1000 annual use hours were commonly in a randomized breakdown period during their useful life but these tractors tend to enter the wear out period in the 1200-2000...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Failure rate; Tractor; Maintenance condition; Khouzestan.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2964

Dispersal Syndromes of fossil Seeds from the Lower Permian of Paraná Basin, Rio Grande do Sul, Brazil
Provedor de dados: 42
Autores: Souza,Juliane M.; Iannuzzi,Roberto.
The morphological analysis of seeds has been an important subject in modern ecological studies, once it provides evidence about the biology and adaptations of the parent plant. However, this kind of study has been restricted to the ecology of modern plants and is rarely used in interpretations of Paleozoic data. From the understanding of dispersal syndromes analysis as an important tool to paleoecological reconstruction, this study provides a first approach using this tool with seeds from the Lower Permian strata of southern Paraná Basin in Rio Grande do Sul. Based on previously classified seeds and using their biological and taphonomic data, the syndrome of dispersal was interpreted, and their placement in successional groups (pioneer, early-successional...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Samaropsis; Cordaicarpus; Dispersal syndromes; Ecological groups; Lower Permian; Paraná Basin.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100006

Benefits of caloric restriction in the myenteric neuronal plasticity in aging rats
Provedor de dados: 42
Autores: PEREIRA,JOICE N.B.; MARI,RENATA B.; STABILLE,SANDRA R.; FARIA,HAROLDO G. DE; MOTA,THAIS F.M.; FERREIRA,WALTER M.
Aging is a biologic process characterized by progressive damage of structures and functions of organic systems. In gastrointestinal tract, it can involve enteric nervous system, which plays an important role in digestion and absorption of nutrients, causing hastening of intestinal transit thus reducing its absorptive function. Caloric restriction has been used in several studies with the intention of delaying deleterious effects of aging. This study aimed to evaluate the effects of caloric restriction on myenteric neurons of ileum by aging in rats. 30 Wistar rats were grouped as follows: GI (animals aged 6 months fed with normal diet), GII (animals aged 18 months fed with normal diet) and GIII (animals aged 18 months subject to 31% of caloric restriction)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aging; Caloric restriction; Myenteric plexus; Small intestine.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301471

Control of the skin scarring response
Provedor de dados: 42
Autores: Ferreira,Lydia M.; Gragnani,Alfredo; Furtado,Fabianne; Hochman,Bernardo.
There comes a time when the understanding of the cutaneous healing process becomes essential due to the need for a precocious tissue repair to reduce the physical, social, and psychological morbidity. Advances in the knowledge on the control of interaction among cells, matrix and growth factors will provide more information on the Regenerative Medicine, an emerging area of research in medical bioengineering. However, considering the dynamism and complexity of the cutaneous healing response, it is fundamental to understand the control mechanism exerted by the interaction and synergism of both systems, cutaneous nervous and central nervous, via hypothalamus hypophysis-adrenal axis, a relevant subject, but hardly ever explored. The present study reviews the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wound healing; Keratinocytes; Fibroblasts; Keloid; Tissue engineering; Skin; Plastic surgery.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000300024

Phytoplankton community of Reis lake in the Brazilian Amazon
Provedor de dados: 42
Autores: SILVA,ISE G.; MOURA,ARIADNE N.; DANTAS,ENIO W.
Reis Lake is located in the municipality of Caracaraí, state of Roraima (Brazil) and is subject to fluctuations in water level. The aim of this study was to analyze the structure of the phytoplankton community on the nictemeral and seasonal scales and determined the influence of limnological variables. Sampling was performed in the rainy season (June/2006) and dry season (November/2006), considering two nictemeral cycles. The phytoplankton community was assessed with regard to composition and density, abiotic variables were analyzed simultaneously. The lake had low concentrations of oxygen, clinograde profile and water stratified during the day and homogenous at night, with low concentrations of nutrients and waters ranging from slightly acidic to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytoplankton; Nictemeral; Floodplain; Seasonal; State of Roraima.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200649

Carbon dioxide/methanol conversion cycle based on cascade enzymatic reactions supported on superparamagnetic nanoparticles
Provedor de dados: 42
Autores: MARQUES NETTO,CATERINA G.C.; ANDRADE,LEANDRO H.; TOMA,HENRIQUE E.
ABSTRACT The conversion of carbon dioxide into important industrial feedstock is a subject of growing interest in modern society. A possible way to achieve this goal is by carrying out the CO2/methanol cascade reaction, allowing the recycle of CO2 using either chemical catalysts or enzymes. Efficient and selective reactions can be performed by enzymes; however, due to their low stability, immobilization protocols are required to improve their performance. The cascade reaction to reduce carbon dioxide into methanol has been explored by the authors, using, sequentially, alcohol dehydrogenase (ADH), formaldehyde dehydrogenase (FalDH), and formate dehydrogenase (FDH), powered by NAD+/NADH and glutamate dehydrogenase (GDH) as the co-enzyme regenerating system....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon dioxide; Enzyme cascade-reaction; Methanol production; Superparamagnetic nanoparticles; Enzymatic catalysis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000200593

The use of piezocone tests for high-resolution stratigraphy of Quaternary sediment sequences in the Brazilian coast
Provedor de dados: 42
Autores: Mio,Giuliano de; Giacheti,Heraldo L.
Correlations between mapping units of costal sedimentary basin and interpretation of piezocone test results are presented and discussed based on examples from Caravelas strandplain, (State of Bahia), Paranaguá (State of Paraná) and Guarujá bays (State of São Paulo), Brazil. Recognizing that the sedimentary environment was mainly controlled by sea level fluctuations led to the interpretation of transgressive and regressive sedimentary sequences, which is in a good agreement with the sea level fluctuation curves currently accepted for these regions. The interpretation of piezocone test results shows that the sedimentary sequences of Caravelas and Guarujá sites are similar and they have a good correlation to the sea level fluctuation curve accepted for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stratigraphic logging; Piezocone test; Paleoenvironment; Geological mapping.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000100017

Tangency quantum cohomology and characteristic numbers
Provedor de dados: 42
Autores: KOCK,JOACHIM.
This work establishes a connection between gravitational quantum cohomology and enumerative geometry of rational curves (in a projective homogeneous variety) subject to conditions of infinitesimal nature like, for example, tangency. The key concept is that of modified psi classes, which are well suited for enumerative purposes and substitute the tautological psi classes of 2D gravity. The main results are two systems of differential equations for the generating function of certain top products of such classes. One is topological recursion while the other is Witten-Dijkgraaf-Verlinde-Verlinde. In both cases, however, the background metric is not the usual Poincaré metric but a certain deformation of it, which surprisingly encodes all the combinatorics of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enumerative geometry; Characteristic numbers; Quantum cohomology; Gromov-Witten invariants.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000300002

Richards growth model and viability indicators for populations subject to interventions
Provedor de dados: 42
Autores: Loibel,Selene; Andrade,Marinho G.; Val,João B.R. do; Freitas,Alfredo R. de.
In this work we study the problem of modeling identification of a population employing a discrete dynamic model based on the Richards growth model. The population is subjected to interventions due to consumption, such as hunting or farming animals. The model identification allows us to estimate the probability or the average time for a population number to reach a certain level. The parameter inference for these models are obtained with the use of the likelihood profile technique as developed in this paper. The identification method here developed can be applied to evaluate the productivity of animal husbandry or to evaluate the risk of extinction of autochthon populations. It is applied to data of the Brazilian beef cattle herd population, and the the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Richards growth model; Population risk; Harvested populations; Parametric estimate; Likelihood profile function.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400028

Looking for attitudes related to amphibian species decline: how are peer-reviewed publications of education activities compared to ecological research?
Provedor de dados: 42
Autores: MORMUL,ROGER P.; MORMUL,TAYLA D.S.; SANTOS,GUSTAVO M.B.; SANTANA,ANA R.A.
ABSTRACT Biodiversity decline has been the focus of discussions in the last decade, especially on the amphibian species decline. After a scientometric analysis using international databases, we found that the number of peer-reviewed articles considering education practices related to the theme increased along with the number of ecological researches. However, the increase in ecological researches is much higher than the increase in publications of education practices. Studies suggest that conservation attitudes are important and that education practices are an important tool for improving human perceptions on this subject. In this sense, increase the publication of projects and programs results related to local education practices in international journals...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental education; Conservation practices; Teaching activities; Amphibian extinctions; Theory and practice.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200491

Cricket singing means rain: semiotic meaning of insects in the district of Pedra Branca, Bahia State, northeastern Brazil
Provedor de dados: 42
Autores: Costa Neto,Eraldo M.
This paper deals with the semiotic meanings which are given both to the appearance and/or behavior of insect species according to the ethnoentomological knowledge of the inhabitants of the village of Pedra Branca, Bahia State, Brazil. Data were collected from February to May 2001 by performing open-ended, recorded interviews with nine men and twenty-five women, whose ages ranged from 19 to 82 years old. Data were analyzed by using the union model, which involves considering all available information on the surveyed subject. Twelve kinds of insects were associated with both beneficial and harmful events, as well as with the indication of changing weather. The way local people perceive and interpret the appearance and/or behavior of certain species of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicator; Ethnoentomology; Folk knowledge; Semiotic meaning.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100007

Physicochemical, Antioxidant and Sensory Quality of Brazilian Blueberry Wine
Provedor de dados: 42
Autores: SANTOS,ROBERTA O.; TRINDADE,SIMONE C.; MAURER,LUANA H.; BERSCH,ANDRIELY M.; SAUTTER,CLAUDIA K.; PENNA,NEIDI G.
ABSTRACT Currently, Rio Grande do Sul state is the main producer of blueberry in Brazil. Practically all production is commercialized in fresh state and only a small portion is subject to processing. The blueberry wine making process is an alternative to expand the beverage industry and offers to the consumer a value-added product as well as a new market for Brazilian blueberry producers. The objectives of this study were to produce wines from blueberries and to evaluate the effect of deacidification (with calcium carbonate) and chaptalization (with glucose syrup or sucrose) on physicochemical characteristics, antioxidant content, and sensory parameters. Samples were analyzed for total soluble solids, pH, total titratable acidity, total sugar content,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vaccinium ashei Reade; Anthocyanin; Phenolic compounds; Alcoholic beverage.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401557

Reproductive morphology of female Guiana dolphins (Sotalia guianensis)
Provedor de dados: 42
Autores: BECEGATO,ESTELLA Z.; ANDRADE,JANAINA P.; GUIMARÃES,JULIANA P.; VERGARA-PARENTE,JOCIERY E.; MIGLINO,MARIA ANGELICA; SILVA,FERNANDA M. DE OLIVEIRA E.
The reproductive morphology of cetaceans is poorly studied and, despite the large number of strandings, reports on this subject are scarce due to access to carcasses mostly in an advanced state of decomposition. The present study aimed to describe histological characteristics of the female genital tract ofSotalia guianensis, in order to assist in future studies on the reproductive biology of these animals. Females of different ages, from stranding events on beaches in northeastern Brazil, were used. Fragments of all organs were collected and processed for light and scanning electron microscopy. Histological analyses showed that these structures were similar to those found in terrestrial mammals, with some peculiarities, such as the presence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Female genital system; Anatomy; Histology; Guiana dolphin.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401727

Photosynthetic capacity and water use efficiency in Ricinus communis (L.) under drought stress in semi-humid and semi-arid areas
Provedor de dados: 42
Autores: SANTOS,CLAUDIANA M. DOS; ENDRES,LAURÍCIO; FERREIRA,VILMA M.; SILVA,JOSÉ V.; ROLIM,EDUARDO V.; WANDERLEY FILHO,HUMBERTO C.L.
ABSTRACT Castor bean is one of the crops with potential to provide raw material for production of oils for biodiesel. This species possess adaptive mechanisms for maintaining the water status when subjected to drought stress. A better understanding these mechanisms under field conditions can unravel the survival strategies used by this species. This study aimed to compare the physiological adaptations of Ricinus communis (L.) in two regions with different climates, the semi-arid and semi-humid subject to water stress. The plants showed greater vapor pressure deficit during the driest hours of the day, which contributed to higher values of the leaf temperature and leaf transpiration, however, the VPD(leaf-air) had the greatest effect on plants in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Water deficit; Stomatal control; Photoinhibition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000603015

Analysis of labour risks in the Spanish industrial aerospace sector
Provedor de dados: 42
Autores: LAGUARDIA,JUAN; RUBIO,EMILIO; GARCIA,ANA; GARCIA-FONCILLAS,RAFAEL.
ABSTRACT Labour risk prevention is an activity integrated within Safety and Hygiene at Work in Spain. In 2003, the Electronic Declaration for Accidents at Work, Delt@ (DELTA) was introduced. The industrial aerospace sector is subject to various risks. Our objective is to analyse the Spanish Industrial Aerospace Sector (SIAS) using the ACSOM methodology to assess its labour risks and to prioritise preventive actions. The SIAS and the Services Subsector (SS) were created and the relevant accident rate data were obtained. The ACSOM method was applied through double contrast (deviation and translocation) of the SIAS or SS risk polygon with the considered pattern, accidents from all sectors (ACSOM G) or the SIAS. A list of risks was obtained, ordered by action...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ACSOM; Labour risks; Workplace prevention; Aerospace industrial sector.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602291

Comments on the Pteranodontidae (Pterosauria, Pterodactyloidea) with the description of two new species
Provedor de dados: 42
Autores: Kellner,Alexander W.A.
Considered one of the best known flying reptiles, Pteranodon has been subject to several reviews in the last century. Found exclusively in the Upper Cretaceous Niobrara Formation and Pierre Shale Group 11 species have been attributed to this genus (excluding the ones presently regarded as representing Nyctosaurus). While reviewers agree that this number is inflated, there is disagreement on how many species can be identified. The last review recognized only two species (Pteranodon longiceps and Pteranodon sternbergi) both being sexually dimorphic. Based on several cranial features, some specimens previously referred to the genus Pteranodon are re-evaluated leading to the recognition of the following species, two of which new that are described here:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pterosauria; Pteranodon; Dawndraco; Late Cretaceous; Taxonomy.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400025

State estimation and optimal long period clinical treatment of HIV seropositive patients
Provedor de dados: 42
Autores: Grégio,Juliana M.; Caetano,Marco A.L.; Yoneyama,Takashi.
Optimal control theory provides a very interesting quantitative method that can be used to assist the decision making process in several areas of application, such as engineering, biology, economics and sociology. The main idea is to determine the values of the manipulated variables, such as drug doses, so that some cost function is minimized, subject to physical constraints. In this work, the cost function reflects the number of CD4+T cells, viral particles and the drug doses. It is worth noticing that high drug doses are related to more intense side-effects, apart from the impact on the actual cost of the treatment. In a previous paper by the authors, the LQR - Linear Quadratic Regulator approach was proposed for the computation of long period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AIDS; Filtering; Drugs; Mathematical modeling; Optimization.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000100002

Additivity of tree biomass components using ratio estimate
Provedor de dados: 42
Autores: PÉLLICO NETTO,SYLVIO; BEHLING,ALEXANDRE.
Abstract: This study deals with the subject biomass estimation. The objective was to achieve the additivity of tree biomass components, which is defined as the compatibility among the component predictions and total tree biomass, using ratio estimates. The biomass estimation model was applied to black wattle trees in forest stands, which include a sample of 670 trees in an age range of 1 to 10.75 years. The adjusted model, in which the total biomass, or sum of predicted components, is a function of the stem volume multiplied by the Scalar Coefficients Proxy of Density, proved to be of great interest for biomass estimation and consistent when compared to the results obtained by WNSUR estimates (traditional method). The natural additivity of the tree biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scalar coefficients proxy of density; Ratio estimate; Stem volume; Quadratic mean diameter; WNSUR.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500851

Functional role of a glycolipid in directional movements of neurons
Provedor de dados: 42
Autores: MENDEZ-OTERO,ROSALIA; SANTIAGO,MARCELO F.
Migration of neurons from their site of origin to their final destination is a critical and universal step in the formation of the complex structure of the nervous system. The migratory process is thought to be governed in part by genetically and epigenetically defined sequences of signals which are interpreted by migrating cells. The molecular mechanisms that underlie neuronal migration have been the subject of intense investigation. As in other developmental processes, many molecules must participate in neuronal migration. Some molecules, such as cell adhesion molecules and motor proteins, may contribute to discrete steps in the migration act; others, like extracellular signaling molecules, may regulate the activation and/or termination of the migration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycolipid; Ganglioside; 9-O-acetyl GD3; Neuronal Migration; Neurite outgrowth; Development.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000200007

Response of the brain to enrichment
Provedor de dados: 42
Autores: DIAMOND,MARIAN C.
Before 1960, the brain was considered by scientists to be immutable, subject only to genetic control. In the early sixties, however, investigators were seriously speculating that environmental influences might be capable of altering brain structure. By 1964, two research laboratories proved that the morphology and chemistry or physiology of the brain could be experientially altered (Bennett et al. 1964, Hubel and Wiesel 1965). Since then, the capacity of the brain to respond to environmental input, specifically "enrichment,'' has become an accepted fact among neuroscientists, educators and others. In fact, the demonstration that environmental enrichment can modify structural components of the rat brain at any age altered prevailing presumptions about the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enrichment; Cerebral cortex; Hippocampus; Aging; Adult neurogenesis; Dendrites.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000200006

Precisão da técnica de absorciometria de raios-x de dupla energia na determinação da composição corporal em gatos
Provedor de dados: 45
Autores: Borges,N.C.; Vasconcellos,R.S.; Canola,J.C.; Paula,F.J.A.; Carciofi,A.C.; Pereira,G.T.
A short-term precision error of the individual subject and the DEXA technique, such as the effect of the repositioning of the cat on the examination table, were established. Four neutered adult cats (BW=4342g) and three females (BW=3459g) were submitted to five repeated scans with and without repositioning between them. Precision was estimated from the mean of the five measurements and expressed by the individual coefficient of variation (CV). The precision error of the technique was estimated by the variance of scan pool (n=35) and expressed in CV for the technique (CVt). The degrees of freedom and confidence intervals were determined to avoid underestimation of precision errors. Bone mineral content (BMC), lean mass (LM), and fat mass (FM) averages were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cat; Repeatability; DEXA.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000100037

Bone marrow mononuclear cells versus mesenchymal stem cells from adipose tissue on bone healing in an Old World primate: can this be extrapolated to humans?
Provedor de dados: 45
Autores: Branco,E.; Miranda,C.M.F.C.; Lima,A.R.; Silva,K.S.M.; Cabral,R.M.; Miranda,M.S.; Ohashi,O.M.; Oliveira,E.H.C.; Silva,L.S.C.; Freitas,D.M.M.; Miglino,M.A.
ABSTRACT In veterinary medicine, the cell therapy is still unexplored and there are many unanswered questions that researchers tend to extrapolate to humans in an attempt to treat certain injuries. Investigating this subject in nonhuman primates turns out to be an unparalleled opportunity to better understand the dynamics of stem cells against some diseases. Thus, we aimed to compare the efficiency of bone marrow mononuclear cells (BMMCs) and mesenchymal stem cells (MSCs) from adipose tissue of Chlorocebus aethiops in induced bone injury. Ten animals were used, male adults subjected, to bone injury the iliac crests. The MSCs were isolated by and cultured. In an autologous manner, the BMMCs were infused in the right iliac crest, and MSCs from adipose tissue...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cell therapy; Chlorocebus aethiops; Bone injury; Mesenchymal stem cells from adipose tissue.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000300917

Characterization of the relations between morphology and physiological status of the pineal gland in connection with the somatic development level in turkeys reared in Romania
Provedor de dados: 45
Autores: Lazăr,R.; Solcan,C.; Creţu,C.; Lazăr,M.; Muntean,C.; Boişteanu,P.C.
This research started from the premises of the existence of some possible relationships between indole and pineal peptide hormones and the somatic development, with participation of hypothalamic-pituitary complex. Experimental factors, which were the subject of the present paper, influenced the dynamics of corporal mass and fodder consumption, leading to the occurrence of some important structural modifications at the level of pineal gland. The exposure of the individuals to continuous light (photic pinealectomy) produces increases in corporal mass, showing the involvement of the pineal gland in neuro-endocrine-metabolic reactions, which contributes to the maintenance of homeostatic balance, including somatic ones. Biological material was represented by a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Turkey; Pineal gland; Productive performance.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000300763

Ultrasonography and portography in the diagnosis of shunt portoazigos in a dog - case report
Provedor de dados: 45
Autores: Santos,C.J.; Valadares,R.C.; Torres,R.C.S.; Nepomuceno,A.C.
ABSTRACT Portosystemic shunt (PSS) is an anomalous vascular connection between the portal venous system and the systemic circulation. These deviations connect the main portal vein (PV) or some portal branches to the vena cava (VC) or, less commonly, to the azygos vein (AV). The purpose of this case report was to describe the diagnosis of PSS in a dog classified as porto-azygos. This diagnosis is considered uncommon compared to other portosystemic shunts using ultrasonography and portography. The subject was a male dog, Yorkshire, 8 months old, presented neurological signs characterized by head press, ataxia, tremors and episodes of temporary blindness and deafness. Ultrasonographic examination revealed a dilated and curved anomalous vessel with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diagnostic imaging; Canine; Portosystemic deviatio.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000300863

Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure
Provedor de dados: 47
Autores: Ravaglia,Mario Aldo; Maggese,María Cristina.
Synbranchus marmoratus (Synbranchidae), commonly known as the swamp eel, is a protogynous diandric teleost fish widely distributed throughout South America. The purpose of this work was to study the ovarian anatomy and to describe oocyte developmental stages in the swamp eel, Synbranchus marmoratus. S. marmoratus has a unique sacular ovary. It is covered by a conspicuous muscular wall, probably involved in an egg-releasing system acting as a peristaltic-like mechanism. The internal ovarian anatomy shows a U-shaped ovarian lamella delimiting a dorsal ovarian lumen. The microscopic study shows evidence of the existence of a germinal epithelium in the inner surface of the lamella, which contains germinal cells, pre-follicular cells and epithelial cells. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Synbranchidae; Ovarian anatomy; Oogenesis; Micropyle.
Ano: 2002
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452002000300003

Misconceptions and false expectations in neutral evolution
Provedor de dados: 48
Autores: VALENZUELA,CARLOS Y.
Neutral evolution results from random recurrent mutation and genetic drift. A small part of random evolution, that which is related to protein or DNA polymorphisms, is the subject of the Neutral Theory of Evolution. One of the foundations of this theory is the demonstration that the mutation rate (m) is equal to the substitution rate. Since both rates are independent of population size, they are independent of drift, which is dependent upon population size. Neutralists have erroneously equated the substitution rate with the fixation rate, despite the fact that they are antithetical conceptions. The neutralists then applied the random walk stochastic model to justify alleles or bases that were fixated or eliminated. In this model, once the allele or base...
Tipo: Journal article
Palavras-chave: Neutral evolution; Neutral theory; Misconceptions; Bases fixation; Elimination.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000300004

Glucose transporters: expression, regulation and cancer
Provedor de dados: 48
Autores: MEDINA,RODOLFO A.; OWEN,GARETH I.
Mammalian cells depend on glucose as a major substrate for energy production. Glucose is transported into the cell via facilitative glucose transporters (GLUT) present in all cell types. Many GLUT isoforms have been described and their expression is cell-specific and subject to hormonal and environmental control. The kinetic properties and substrate specificities of the different isoforms are specifically suited to the energy requirements of the particular cell types. Due to the ubiquitousness of these transporters, their differential expression is involved in various disease states such as diabetes, ischemia and cancer. The majority of cancers and isolated cancer cell lines over-express the GLUT family members which are present in the respective tissue of...
Tipo: Journal article
Palavras-chave: GLUT; Glucose transporters; Expression; Cancer; Estrogen; Progesterone; Cell lines.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000100004

From autopoiesis to neurophenomenology: Francisco Varela's exploration of the biophysics of being
Provedor de dados: 48
Autores: RUDRAUF,DAVID; LUTZ,ANTOINE; COSMELLI,DIEGO; LACHAUX,JEAN-PHILIPPE; LE VAN QUYEN,MICHEL.
This paper reviews in detail Francisco Varela's work on subjectivity and consciousness in the biological sciences. His original approach to this "hard problem" presents a subjectivity that is radically intertwined with its biological and physical roots. It must be understood within the framework of his theory of a concrete, embodied dynamics, grounded in his general theory of autonomous systems. Through concepts and paradigms such as biological autonomy, embodiment and neurophenomenology, the article explores the multiple levels of circular causality assumed by Varela to play a fundamental role in the emergence of human experience. The concept of biological autonomy provides the necessary and sufficient conditions for characterizing biological life and...
Tipo: Journal article
Palavras-chave: Autonomous systems; Brain dynamics; Consciousness; Embodiment; Francisco Varela; Neurophenomenology.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000100005

Olfactory or auditory stimulation and their hedonic valúes differentially modulate visual working memory
Provedor de dados: 48
Autores: DONOSO,ANA M; FAUNDES,VÍCTOR; FALCON,FELIPE; ESPARZA,PAULINA; MALDONADO,PEDRO E.
Working memory (WM) designates the retention of objects or events in conscious awareness when these are not present in the environment. Many studies have focused on the interference properties of distracter stimuli in working memory, but these studies have mainly examined the influence of the intensity of these stimuli. Little is known about the memory modulation of hedonic content of distracter stimuli as they also may affect WM performance or attentional tasks. In this paper, we have studied the performance of a visual WM task where subjects recollect from five to eight visually presented objects while they are simultaneously exposed to additional - albeit weak- auditory or olfactory distracter stimulus. We found that WM performance decreases as the...
Tipo: Journal article
Palavras-chave: Humans; Odor Hedonic; Visual Memory; Multimodal Memory.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400003

Some considerations about the theory of intelligent design
Provedor de dados: 48
Autores: CARREÑO,JUAN E; HANSEN,FERNANDO; IRARRÁZABAL,MATÍAS; PHILIPPI,RODOLFO; CORREA,MATÍAS; BORJA,FRANCISCO; ADRIASOLA,CRISTÓBAL; SILVA,FRANCISCO; SERANI,ALEJANDRO.
The so-called theory of intelligent design (ID) has gained a growing reputation in the Anglo-Saxon culture, becoming a subject of public debate. The approaches that constitute the core of this proposal, however, have been poorly characterized and systematized. The three most significant authors of ID are certainly Michael Behe, William Dembski and Stephen Meyer. Beyond the differences that can be distinguished in the work of each of them, the central fact in their arguments is the complexity of living organisms, which according to these authors, escapes any kind of natural explanation. In effect, according to the authors of ID, the irreducible complexity that can be detected in the natural world would allow to infer design in a scientifically valid way,...
Tipo: Journal article
Palavras-chave: Epistemology; Evolution; Intelligent design; Science.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200011

Classification methods for ongoing EEG and MEG signals
Provedor de dados: 48
Autores: BESSERVE,MICHEL; JERBI,KARIM; LAURENT,FRANCOIS; BAILLET,SYLVAIN; MARTINERIE,JACQUES; GARNERO,LINE.
Classification algorithms help predict the qualitative properties of a subject's mental state by extracting useful information from the highly multivariate non-invasive recordings of his brain activity. In particular, applying them to Magneto-encephalography (MEG) and electro-encephalography (EEG) is a challenging and promising task with prominent practical applications to e.g. Brain Computer Interface (BCI). In this paper, we first review the principles of the major classification techniques and discuss their application to MEG and EEG data classification. Next, we investigate the behavior of classification methods using real data recorded during a MEG visuomotor experiment. In particular, we study the influence of the classification algorithm, of the...
Tipo: Journal article
Palavras-chave: Brain computer interface; Electroencephalography; Magnetoencephalography; Visuomotor control; Support Vector Machine.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000500005

Microdesiccates produced from normal human tears display four distinctive morphological components
Provedor de dados: 48
Autores: López Solís,Remigio; Traipe Castro,Leonidas; Salinas Toro,Daniela; Srur,Miguel; Toledo Araya,Héctor.
Desiccation of human tears on glass surfaces results in fern-like crystalloids. This phenomenon has been associated with tear normality (Tear Ferning Test, TFT) and is used as a diagnostic aid to evaluate patients with Dry-Eye disease. However, TFT is focused on the assessment of only a minor fraction of desiccated tear samples and considers only the relative abundance and density of fern-like crystalloids. The aim of this study was to characterize morphologically entire desiccated micro volumes of tears from healthy donors. Tear samples were collected from 23 healthy young adult volunteers. Tear aliquots (1-3 &amp;#956;L) were allowed to dry on glass surfaces under ambient conditions of temperature (15-25°C) and relative humidity (40-45%). Dry samples...
Tipo: Journal article
Palavras-chave: Tear; Tear ferning test; Morphometry; Dark-field microscopy.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000300012

Diversity of cetaceans as tool in monitoring environmental impacts of seismic surveys
Provedor de dados: 49
Autores: Parente,Cristiano Leite; Araújo,Janaína Pauline de; Araújo,Maria Elisabeth de.
New information about the effects of seismic surveys on cetaceans is causing increasing concern about the impact of this type of activity on marine life. The effects described include behavioral responses and changes in vocalization patterns, diversion of migratory routes, damage to the auditory system, and an increase in strandings. Although such effects could affect the diversity of species in areas where seismic research has been carried out, there is no scientific information on this subject. This study aims to evaluate the relationship between seismic surveys, oceanographic data and diversity of cetaceans recorded in Brazil following the stepping up of seismic survey activities between 1999 and 2004. The study is based on oceanographic data from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Noise impact; Seismic survey; Diversity of cetaceans; South America.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100007

Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil
Provedor de dados: 49
Autores: Trajano,Eleonora; Secutti,Sandro; Mattox,George Mendes Taliaferro.
After an ichthyofaunistic survey conducted in May 2007 on surface (epigean) water bodies of Cordisburgo karst area, State of Minas Gerais, 13 species were recorded, mostly characiforms; in addition three non-troglomorphic (normally eyed and pigmented) and one troglomorphic catfish (siluriforms) species were recorded in two caves surveyed at different occasions, totaling 17 fish species for the area. All the nominal species herein reported for Cordisburgo area have been previously reported for the Rio das Velhas basin. None of the species observed in caves were found in epigean habitats and vice-versa. The four cave species are distributed throughout subterranean stream reaches, with individuals at different size/age classes. This, associated to the lack of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Minas Gerais State; Caves; Troglobites; Troglophiles; Freswater fishes; Biodiversity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000300026

Ferruginous Pygmy-owl (Glaucidium brasilianum) predation on a mobbing Fork-tailed Flycatcher (Tyrannus savana) in south-east Brazil
Provedor de dados: 49
Autores: Motta-Junior,José Carlos.
I observed, and documented in detail, Ferruginous Pygmy Owl (Glaucidium brasilianum) predation on a mobbing Fork-tailed Flycatcher (Tyrannus savanna) in south-east Brazil. Events described in this account are supported with original photos. In addition to the predation event, I list 12 mobbing bird species that were alarmed by the presence of this raptor in the study area, including Trochilidae (Eupetomena macroura), Formicariidae (Formicivora rufa), Tyrannidae (Camptostoma obsoletum, Elaenia cristata, E. flavogaster, E. chiriquensis, T. savana, Myiarchus tyrannulus), Turdidae (Turdus leucomelas, T. amaurochalinus, T. rufiventris) and Emberizidae (Coryphospingus cucullatus). The Fork-tailed Flycatcher may represent 35-76.8% of the pygmy-owl body mass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Owls; Tyrant-flycatchers; Mobbing behaviour; Predation; Eyespots; Brazil.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000200038

Reproduction and demographic trends of Sula Leucogaster at the Moleques do Sul Archipelago, Santa Catarina, Brazil
Provedor de dados: 49
Autores: Branco,Joaquim Olinto; Fracasso,Hélio Augusto Alves; Moraes-Ornellas,Valéria dos Santos.
The Brown Booby, Sula Leucogaster, is one of the most common species of marine birds of the Brazilian coast and, in spite of being a viable subject for long-term studies, in Brazil there are scarce demographic descriptions of this species obtained from observations made in sets of consecutive years. This paper presents breeding information collected in monthly samples taken in the Moleques do Sul Island, Florianópolis, Santa Catarina, during a five year period. The main island was divided into three different study areas, in which adult censuses were conducted, along with counts of number of nests, eggs, chicks and incubating adults. No significant change was found in these numbers during the sampled years and the breeding season extended over the entire...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brown Booby; Reproduction; Demographic parameters; Santa Catarina; Brazil.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400039

The identity of Apostolepis pymi and placement of A. quinquelineata in the synonymy of A. nigrolineata (Serpentes, Xenodontinae)
Provedor de dados: 49
Autores: Lema,Thales de; Albuquerque,Nelson Rufino de.
The correct application of the names Apostolepis nigrolineata, A. quinquelineata, and A. pymi has been subject of considerable controversy. Based upon review of the literature and the characteristics used to distinguish these species from each other, we conclude that A. pymi is a valid species and that A. quinquelineata is a junior synonym of A. nigrolineata. They differ from each other in hemipenial morphology and coloration. The background color of A. nigrolineata is reddish brown (vs. brown in A. pymi). In addition, only the dorsal region of end of tail is covered by a black band in A. nigrolineata (vs. end of tail completely surrounded by a black band in A. pymi). Both species are sympatrically distributed along the lowlands of Amazonia but A....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Dipsadidae; Apostolepis; Taxonomy; Synonymization; Amazon region.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000100031

Genotypic Diversity of the Wheat leaf blotch pathogen ( Septoria tritici ) in Buenos Aires Province
Provedor de dados: 51
Autores: Cordo,Cristina Alicia; Linde,Celeste C.; Zhan,Jashiu; Mcdonald,Bruce.
The population structure and genotypic diversity of Septoria tritici Rob ex Desm. from two crop field populations in Buenos Aires Province were studied with DNA restriction fragment length polymorphism. Hierarchical samples were taken from different cultivars. A total of 120 single spore isolates was subject to molecular analysis to compare the genetic structure of Los Hornos and Balcarce populations separated by 500km. Eight RFLP loci and 1DNA fingerprinting were used. Among the total of the isolates, 24 RFLP alleles were detected from the first population and 22 from the second. Gene and genotype diversity were high in both populations. Different haplotypes for each region were identified. Identical haplotypes were clustered in the same location in the...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: DNA hybridization; Septoria tritici; Mycosphaerella graminicola; RFLP; Epidemiology; Genetic diversity; Genotypic diversity.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722006000200010

Applied aspects of pineapple flowering
Provedor de dados: 53
Autores: Cunha,Getúlio Augusto Pinto da.
Flowering is an amazing, integrated and complex process of multifatorial control, which due to its great importance for agriculture has been extensively studied worldwide. Pineapple is one of the main crops on which many research works about this subject have been carried out, and it was the first one to have artificially induced flowering. However, even with all those studies, pineapple flowering is not yet characterized in many aspects. The main point for the comprehension of the physiologic aspects of flowering initiation is the identification of the factors involved in the differentiation of the apical meristem into floral primordium, as well as how these factors exert their action. This work aimed to describe the flowering process of pineapple plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ananas comosus var. comosus; Inflorescence; Flowering control; Plant growth regulators.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052005000400001

Silicon nutrition counteracts salt-induced damage associated with changes in biochemical responses in apple
Provedor de dados: 53
Autores: Aras,Servet; Keles,Hakan; Eşitken,Ahmet.
ABSTRACT Salt stress is an environmental challenge that adversely influences plant responses. Silicon (Si) nutrition plays critical roles in plant tolerance to salt stress. Apple (Malus domestica Borkh.), a salt sensitive fruit species, was used in the present experiment to investigate the influences of Si on salt stress as well as on alterations of biochemical responses. Apple cv Fuji grafted on M9 clonal rootstock was exposed to salt stress for 4 months with 35 mmol·L-1 NaCl. CaSiO3 doses (0.5, 1 and 2 mmol·L-1) were applied to the roots of the salt-stressed apple plants except control. Si application resulted in mitigation of salt stress in apple plants. The highest chlorophyll a, b and a + b were obtained from the 1 mmol·L-1 Si treatment (5.37, 2.41...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malus domestica Borkh; Plant behavior; Rootstock; Salinity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100001

Sensitivity of the sorghum yield to individual changes in climate parameters: modelling based approach
Provedor de dados: 53
Autores: Grossi,Marine Cirino; Justino,Flávio; Rodrigues,Rafael de Ávila; Andrade,Camilo Lelis Teixeira.
Based on sensitivity analyses the effect of changing in climate on sorghum has been investigated. This has been achieved by conducting crop modeling experiments carried out with weather observations and output of global climate models. As can be anticipated results demonstrated that the sorghum yield is more sensitive to rainfall, solar radiation and CO2 concentration. However, the increase in CO2 concentration has a positive effect on yield in years that the crop is submitted to water stress. This effect is extremely reduced under well watered conditions and therefore is subject to the climate inter-annual variability. Accumulated solar radiation along the sorghum cycle below 1900 MJ m–2 has also been shown to reduce the yield. Compared to other weather...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate change; Crop models; Sensitivity analyses; CO2 concentration; Productivity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000300341

Variedades de batatinha (Solanum tuberosum L.) procedentes da Holanda: parte II - resultados experimentais da segunda plantação, no país, com tubérculos importados em 1947
Provedor de dados: 53
Autores: Boock,O. J.
This paper presents the results obtained from six replicated experimental plantings of Irish potatoes in the State of São Paulo, Brazil. The potatoes tubers employed as seed in these test plantings were selected from the crop produced from the original tubers introduced from Holland in 1947. The results obtained from plantings in February 1947 made of the original seed pieces were the subject of a previous publication. The current tests reported herein were carried out in the same areas as those previously reported. The date of the second planting was, September 1947 and the second crop was harvested in February and March of 1948. The results obtained from the second plantings were similar to those secured from the original tests. Phytopthora infection was...
Tipo: Info:eu-repo/semantics/article
Ano: 1948
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051948000100004

Measuring of the Genotoxic and Potential Antioxidant Effects of Essential Oil Obtained from Satureja Hortensis Against to Phaseolus Vulgaris
Provedor de dados: 52
Autores: Bozari,Sedat.
ABSTRACT It is known that, there are many ways for increasing the yield at the crops specially cereal products. Genetic manipulations and physiological interventions are the primary studies that aim to obtain products at high quality and amounts. It is known that, the usage of synthetic chemicals for physiological inverventions negatively affects organism. But using natural plant products instead of these chemicals is a subject that draws attention of today scientific environment. In this study, this situation was taken into consideration and the essential oil obtained from Satureja hortensis (SEO) plant were applied to bean seeds. The genotoxic and physiological effects of SEO at four different dosages were detected against to Phaseolus vulgaris...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant Enzymes; Biyopesticide; Essential Oil; GTS.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100431

Photosynthetic capacity and water use efficiency in sugarcane genotypes subject to water deficit during early growth phase
Provedor de dados: 52
Autores: Silva,Marcelo de Almeida; Jifon,John Lonfover; Santos,Claudiana Moura dos; Jadoski,Cleber Junior; Silva,Jorge Alberto Gonçalves da.
The objective of this study was to compare the gas exchange, photosynthetic capacity and water potential of sugarcane genotypes cultivated under water deficit conditions imposed during the initial growth phase. Experiments were performed in a greenhouse using two sugarcane genotypes namely: HoCP93-776 (drought susceptible) and TCP02-4587 (drought tolerant). Sixty days after planting, two different water treatments were applied (i.e., with or without water deficit). At 0,30 and 60 days after the treatment, gas exchange variables were evaluated for their relationship with water use, intrinsic instantaneous water use efficiency and instantaneous carboxylation efficiency. The SPAD index, photosynthetic pigments, water potential and relative water content in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Photosynthesis; Stomatal conductance; Chlorophyll; Drought tolerance; Water potential.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500004

Energy Management in Energy-Intensive Industries: Developing a Conceptual Map
Provedor de dados: 52
Autores: Silva,Vilson Roiz Gonçalves Rabelo da; Loures,Eduardo de Freitas Rocha; Lima,Edson Pinheiro de; Costa,Sergio Eduardo Gouvêa da.
Abstract This paper presents the development of a conceptual map regarding energy management applied to industry. The energy issue is currently of great relevance, especially for the so-called energy-intensive industries related to high energy consumption and their associated environmental impacts. The present research is characterized as a basic, exploratory approach justified by the need to build knowledge on the subject of energy management in industry. The methodology provides for the use of a computational tool called CMap Tools, which assists in the graphic representation of the proposed conceptual map. The conceptual map based on the ISO 50001 standard and on successful energy management practices described in the scientific literature is directed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy management system; Energy-intensive industries; Conceptual map.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000200216

Identification and quantification of monomers released from dental composites using HPLC
Provedor de dados: 52
Autores: Archegas,Lucí Regina Panka; Rached,Rodrigo Nunes; Ignacio,Sérgio Aparecido; Vasconcelos,Eliane Carvalho de; Ramos,Débora Toledo; Souza,Evelise Machado de.
The aim of this study was to detect and quantify the main residual monomers released from composites, using high performance liquid chromatography (HPLC). Discs were made with dental composites (Herculite XRV, Tetric Ceram and Filtek Z250) and immersed in deionized water at 37ºC for 28 days, with water changes in 1, 7, 14 and 21 days. The mean concentration of residual monomers were subject to the Kruskal-Wallis test (p&lt;0.05). Tetric Ceram exhibited significantly higher concentrations of leached monomers. Bis-GMA was the monomer released in lower concentrations for all the materials. There was no statistical difference between the amounts of TEGDMA and UDMA. Most of the monomers demonstrated maximal concentration at the 7-day period. The HPLC analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dental composites; Monomers; HPLC; TEGDMA; Bis-GMA; UDMA.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400009

Morpho-Anatomical Analysis of the Rhizome in Species of Scleria Berg. (Cyperaceae) from Serra do Cipó (MG)
Provedor de dados: 52
Autores: Lima,Vera Fatima Gomes Alves Pereira; Menezes,Nanuza Luiza de.
Aspects related to the nature of stem thickening in monocotyledons have been the subject of many studies. Primary thickening has been attributed to the Primary Thickening Meristem (PTM). According to most authors, it gives rise, besides the adventitious roots, to the vascular tissues and part of the cortex. In other words, it has centripetal and centrifugal activity. For some authors, however, it gives rise only to the vascular system, and for others, only to part of the cortex. However, this work demonstrated that PTM corresponds to the pericycle in the meristematic phase or to the pericycle associated with the endodermis, also with meristematic activity. It was observed that the pericycle was responsible for the formation of the vascular system of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meristematic endodermis; Rhizome; Cyperaceae.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600019

Relationship Between Parameters of Development and Functional Compounds of Yacon Leaves
Provedor de dados: 52
Autores: Ferreira,Bruna Mayara Roldão; Dagostin,João Luiz Andreotti; Andrade,Eriel Forville de; Takashina,Thiago Atsushi; Ellendersen,Luciana de Souza Neves; Masson,Maria Lucia.
Abstract Yacon is a tuberous root from the Andean region being increasingly grown across the world due to the low caloric values of their roots and the functional properties of extractions of its leaves. However, there is still a gap in the knowledge of how the plant develops, and if physical and chemical changes are noticed regarding maturity. The subject of this work was to investigate the dynamics of a group of parameters and to establish correlations across them. To achieve this goal, leaves collected from three different parts of the plant in three months were assessed regarding size (plant height and leaf area), color and the presence of sesquiterpene lactones. Different methods of extraction were also studied and the total phenolic content was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Smallanthus sonchifolius; Sesquiterpene lactones; Physical parameters; Chemical parameters; Phenolic content.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100430

Nuclear medicine imaging technique in the erectile dysfunction evaluation: a mini-review
Provedor de dados: 52
Autores: Ribeiro,Camila Godinho; Moura,Regina; Neves,Rosane de Figueiredo; Spinosa,Jean Pierre; Bernardo-Filho,Mario.
Functional imaging with positron emission tomography and single photon emission computed tomography is capable of visualizing subtle changes in physiological function in vivo. Erectile dysfunction(ED) diminishes quality of life for affected men and their partners. Identification of neural substrates may provide information regarding the pathophysiology of types of sexual dysfunction originating in the brain. The aim of this work is to verify the approaches of the nuclear medicine techniques in the evaluation of the erectile function/disfunction. A search using the words ED and nuclear medicine, ED and scintigraphy, ED and spect and ED and pet was done in the PubMed. The number of citations in each subject was determined. Neuroimaging techniques offer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nuclear medicine; Erectile dysfunction; Positron emission tomography; Single photon emission computed tomography.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000600010

Proposal of methodology and test protocol for evaluating and qualifying pH measuring devices
Provedor de dados: 52
Autores: Almeida,Niza Helena de; Nohama,Percy.
We present a proposal for evaluating and qualifying pH measuring devices based on the requirements of relevant standards. The proposal presented is based on ASTM E70, NBR 7353, JIS Z 8805, BS 3145, DIN 19268, NBR ISO 17025 and other standards, as well as the results of field research carried out in conjunction with professionals performing pH measurements in public health laboratories. Evaluation is performed by inspection of a form which records data from the measuring system. The form gives acceptable variations in the parameters being tested and allows a conclusion to be reached regarding acceptability of the system. Using the proposed protocol allows definition of suitable analysis criteria, while taking into account the influence pH measurement is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quality control; PH measurement; Instrumentation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000200005

Microalgae: Cultivation Aspects and Bioactive Compounds
Provedor de dados: 52
Autores: Coêlho,Diego de Freitas; Tundisi,Louise Lacalendola; Cerqueira,Keilla Santos; Rodrigues,Jacqueline Rego da Silva; Mazzola,Priscila Gava; Tambourgi,Elias Basile; Souza,Roberto Rodrigues de.
Abstract Microalgae are aquatic unicellular microorganisms that can be found both in freshwater and marine systems; are capable of photosynthesis; and can grow as individual cells or associated in chains or small colonies. Microalgae cultivation has gained large momentum among researchers in the past decades due to their ability to produce value metabolites, remarkable photosynthetic efficiency, and versatile nature. The wide technological potential, and thus increasing amount of scattered knowledge, may become the very first barrier that a post graduating student, or any non-specialist reader, will face when introduced to the subject. In this review paper, we access the core aspects of microalgae technology, covering their main characteristics, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microalgae; Microalgae Selection and Isolation; Green Products; Microalgae Cultivation; Bioactive Compounds.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000101000

Differential expression of Zymomonas mobilis sucrase genes (sacB and sacC) in Escherichia coli and sucrase mutants of Zymomonas mobilis
Provedor de dados: 52
Autores: Gurunathan,Sangiliyandi; Gunasekaran,Paramasamy.
The sacB and sacC genes encoding levansucrase and extracellular sucrase respectively were independently subcloned in pBluescript (high copy number) and in Z. mobilis-E. coli shuttle vector, pZA22 (low copy number). The expression of these genes were compared under identical background of E. coli and Z. mobilis host. The level of sacB gene expression in E. coli was almost ten fold less than the expression of sacC gene, irrespective of the growth medium or the host strain. In Z. mobilis the expression of sacB and sacC genes was shown to be subject to carbon source dependent regulation. The transcript of sacB and sacC was three fold higher in cells grown on sucrose than in cells grown on glucose/fructose. Northern blot analysis revealed that the transcript...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zymomonas mobilis; Escherichia coli; Expression; Levansucrase; Extracellular sucrase.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300001

Assessment of the Potential Implementation of Solar Energy Generation in State Schools in Curitiba/PR
Provedor de dados: 52
Autores: Pereira,Juliano da Silva; Ribeiro,Daniele Abe; Lucena,Francielle Henrique; Urbanetz Júnior,Jair.
ABSTRACT Solar energy as a form of electric power generation is gaining ground in Brazil, being the subject of worldwide discussions on sustainability. The electric energy, a right of all citizens, represents a consumption of natural resources on a large scale. State schools in Paraná invested more than R$ 46 million to guarantee electricity and thus provide essential running conditions to the system in 2016. Through open data, 15 schools from "Regional Administrativa do Cajuru", in Curitiba/PR, were evaluated in consumption and expenses of electric energy from January to May of 2017 and a solar photovoltaic system was dimensioned to supply the demand of each school. From that, it was estimated the total saving from the electricity that would no longer be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photovoltaic Solar Energy; Renewable energy; Education for Sustainability; State Schools; Public Administration.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000200208

Evaluation of the performance of the modified direct agglutination test (MAT) for detection of Toxoplasma gondii antibodies in dogs
Provedor de dados: 62
Autores: Cañón Franco,William Alberto; Bergamaschi,Denise Pimentel; Richtzenhain,Leonardo José; Nogueira,Yeda; Camargo,Luís Marcelo Aranha; Souza,Silvio Luís Pereira de; Gennari,Solange Maria.
Toxoplasmosis is a zoonosis that has been the subject of study in Brazil and worldwide. The dogs are sentinels for the infection and can carry Toxoplasma gondii in the environment. Seroepidemiological surveys of these animals are an important tool in the surveillance and control of the disease and inform decision-making in health programs. In this study the performance of the Modified Agglutination Test (MAT) in the serodiagnosis of canine toxoplasmosis is evaluated and compared to the indirect immunofluorescent-antibody test (IFAT). A sample of 157 dog sera from the county of Monte Negro, Rondônia, with 76.40% positive reactions for Toxoplasma gondii (IFAT =16) was analyzed using the MAT (=25), presenting sensitivity of 85.00% (Confidence Interval 95.00%:...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Toxoplasma gondii; Dog; Agglutination tests; Sensitivity and specificity.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962003000600009

Hidrogeochemical comparative study of the Jaú and Jacaré-Guaçu River watersheds, São Paulo, Brazil
Provedor de dados: 57
Autores: SOUZA,A. D. G. de; TUNDISI,J. G.
The main subject of the present work was to carry out a hydrochemistry comparative study between two river basins in São Paulo State: the Jacaré-Guaçu Basin (21°37'-22°22'S and 47°43'-48°57'W) and the Jaú Basin (22°09'-22°28'S and 48°16'-48°47'W). Nine sampling points in the Jacaré-Guaçu River and eight in the Jaú River were established. The water sampling was performed once each two months from March/95 to September/95. The following variables were analyzed: temperature (°C), pH, conductivity (muScm--1), dissolved oxygen (mg/L) and ionic water composition. Comparatively the Jaú River showed higher spatial variability, less oxygenated water and higher mineralization, due to high pedological and geological substrate richness, point sources existence and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: River basin; River chemistry; Land uses.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400004

The use of mechanical aeration and its effects on water mass
Provedor de dados: 57
Autores: SIPAÚBA-TAVARES,L. H.; FREITAS,A. M.; BRAGA,F. M. S.
Due to the increasing use of artificial aerators in fish ponds, and to the lack of studies on this subject, this work studied some of the aspects associated with their use. The influence of a diffuser type aerator (AR 120) on the biotic and abiotic variables was evaluated in a fish pond. Three points of the pond were marked for the taking of samples: 5, 10 and 23 m from the aerator. Samples were taken every day for 15 consecutive days: 5 days before the use of the aerator, 5 days with the aerator functioning and 5 days with it not functioning. The limnological variables studied did not show significant differences (P &gt; 0.05) when the three sampling points were compared, but regarding the use of the aerator, variables such as water temperature,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanical aeration; Limnological characteristics; Pond.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100005

Pseudotumoral form of primary progressive tuberculosis: a diagnosis to be considered
Provedor de dados: 55
Autores: Franco,Rosana; Santana,Maria Angélica; Coelho Filho,João Carlos; Pereira-Silva,Jorge L.
The diversity of clinical presentations of primary progressive tuberculosis (TB) and the difficulty in establishing the diagnosis of paucibacillary forms is the subject of painstaking research, as well as a cause of delay in therapy. We report the case of a 10-year-old black child who presented with chest pain and progressive widening of the upper mediastinum. Computerized tomography of the chest revealed multiple calcifications that were not identified with X-rays. Biopsy through mediastinoscopy was compatible with a diagnosis of tuberculosis. Despite exhaustive investigation that included direct examination, culture for mycobacteria and PCR (Polymerase Chain Reaction) of tissue samples, the etiologic agent was not revealed. Tuberculin conversion was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lymph node tuberculosis; Pseudotumoral form; Diagnosis.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000200011

The impact of urinary incontinence on the quality of life and on the sexuality of patients with HAM/TSP
Provedor de dados: 55
Autores: Gascón,Maria Rita Polo; Mellão,Mirella de Almeida; Mello,Sandra Helena; Negrão,Rosangela Maria; Casseb,Jorge; Oliveira,Augusto César Penalva de.
ABSTRACT This study evaluated the impact of urinary incontinence (UI) on sexuality, body image, mood, and quality of life of patients with myyelopathy associated with HTLV-1/tropical spastic paraparesis (HAM/TSP). The sample consisted of 31 HAM/TSP outpatients, of both sexes, followed-up at the Emílio Ribas Infectology Institute. The following instruments were used: sociodemographic questionnaire, Hospital Anxiety and Depression Scale (HAD), Body Image Assessment Scale, Sexual Quotient Female (QS-F) and Male (QS-M) Versions, King's Health Questionnaire (KHQ), and Revised OSAME Motor Disability Score. Data analysis was performed using descriptive statistics and the Mann-Whitney U-test was used for group comparison. The presence of UI was reported by 13...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HAM/TSP; Quality of life; Urinary incontinence.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000400288

Climatic changes: what if the global increase of CO2 emissions cannot be kept under control?
Provedor de dados: 56
Autores: Barreto de Castro,L.A.
Climatic changes threaten the planet. Most articles related to the subject present estimates of the disasters expected to occur, but few have proposed ways to deal with the impending menaces. One such threat is the global warming caused by the continuous increase in CO2 emissions leading to rising ocean levels due to the increasing temperatures of the polar regions. This threat is assumed to eventually cause the death of hundreds of millions of people. We propose to desalinize ocean water as a means to reduce the rise of ocean levels and to use this water for populations that need good quality potable water, precisely in the poorest regions of the planet. Technology is available in many countries to provide desalinated water at a justifiable cost...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Climatic changes; CO2 emissions; Global warming; Desalination of ocean water.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000300002

Raising awareness of chronic kidney disease in a Brazilian urban population
Provedor de dados: 56
Autores: Mazza Nascimento,M.; Riella,M.C.
The incidence and prevalence of chronic kidney disease have been increasing in recent years in developing countries. The aim of this study was to report the results of a general chronic kidney disease awareness program applied to an urban population in a large Brazilian city. From January 2002 to January 2005 a total of 8883 individuals in the city of Curitiba (PR, Brazil) were screened for hypertension, body mass index, hematuria, and proteinuria. A family history and previous medical diagnosis of hypertension and diabetes mellitus (DM) were also recorded. Of the 8883 individuals assessed, 56% were women, subject median age was 47 years (range: 17-93 years) and more than 90% were Caucasian. Thirty percent had signs of hematuria, 6% had proteinuria, and 3%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hematuria; Proteinuria; Prevention; Chronic kidney disease; Screening.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000800010

Validation of the Brazilian Children's Test of Pseudoword Repetition in Portuguese speakers aged 4 to 10 years
Provedor de dados: 56
Autores: Santos,F.H.; Bueno,O.F.A.
The phonological loop is a component of the working memory system specifically involved in the processing and manipulation of limited amounts of information of a sound-based phonological nature. Phonological memory can be assessed by the Children's Test of Nonword Repetition (CNRep) in English speakers but not in Portuguese speakers due to phonotactic differences between the two languages. The objectives of the present study were: 1) to develop the Brazilian Children's Test of Pseudoword Repetition (BCPR), a Portuguese version of the CNRep, and 2) to validate the BCPR by correlation with the Auditory Digit Span Test from the Stanford-Binet Intelligence Scale. The BCPR and Digit Span were assessed in 182 children aged 4-10 years, 84 from Minas Gerais State...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Children; Working memory; Children's Test of Nonword Repetition; Pseudoword repetition test; Phonological loop; Portuguese language.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001100012

Behavioral modulation by mutilation pictures in women
Provedor de dados: 56
Autores: Pereira,M.G.; Volchan,E.; Oliveira,L.; Machado-Pinheiro,W.; Rodrigues,J.A.; Nepomuceno,F.V.P.; Pessoa,L.
Previous studies have shown that women are more emotionally expressive than men. It is unclear, however, if women are also more susceptible to the emotional modulation of behavior imposed by an affective stimulus. To investigate this issue, we devised a task in which female subjects performed six sequential trials of visual target detection following the presentation of emotional (mutilation and erotic) or neutral pictures (domestic utensils and objects) and compared the data obtained in the present study with those described in a previous study with male subjects. The experiment consisted of three blocks of 24 pictures and each block had an approximate duration of 4 min. Our sample consisted of 36 subjects (age range: 18 to 26 years) and each subject...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Emotion; Behavior; Reaction time; Sex differences; Affective stimulus.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300011

Contrast sensitivity to angular frequency gratings is not higher than to Cartesian gratings
Provedor de dados: 56
Autores: Zana,Y.; Cavalcanti,A.C.G.T.
When contrast sensitivity functions to Cartesian and angular gratings were compared in previous studies the peak sensitivity to angular stimuli was reported to be 0.21 log units higher. In experiments carried out to repeat this result, we used the same two-alternative forced-choice paradigm, but improved experimental control and precision by increasing contrast resolution from 8 to 12 bits, increasing the screen refresh rate from 30 Hz interlaced to 85 Hz non-interlaced, linearizing the voltage-luminance relation, modulating luminance in frequencies that minimize pixel aliasing, and improving control of the subject's exposure to the stimuli. The contrast sensitivity functions to Cartesian and angular gratings were similar in form and peak sensitivity (2.4...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contrast sensitivity functions; Cartesian and polar coordinates; Radial and angular gratings.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000200010

Cerebral vasomotor reactivity assessment using Transcranial Doppler and MRI with apnea test
Provedor de dados: 56
Autores: Herrera Campos,C.R.; Beltramini,G.C.; Avelar,W.M.; Lima,F.O.; Li,L.M.
Differently from previous studies that used Transcranial Doppler (TCD) and functional MRI (fMRI) for cerebral vasomotor reactivity (CVR) assessment in patients with carotid stenosis (CS), we assessed CVR using an identical stimulus, the Breath-Holding Test (BHT). We included 15 patients with CS and 7 age-matched controls to verify whether fMRI responded differently to BHT between groups and to calculate the agreement rate between tests. For TCD, impaired CVR was defined when the mean percentage increase on middle cerebral artery velocities was ≤31% on 3 consecutive 30-s apnea intercalated by 4-min normal breathing intervals. For fMRI, the percent variation on blood oxygen level-dependent (BOLD) signal intensity in the lentiform nucleus (LN) ipsilateral to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blood oxygen level dependence; Transcranial Doppler; Carotid stenosis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016001100704

Angiotensin-II-induced reactive oxygen species along the SFO-PVN-RVLM pathway: implications in neurogenic hypertension
Provedor de dados: 56
Autores: Braga,V.A.; Medeiros,I.A.; Ribeiro,T.P.; França-Silva,M.S.; Botelho-Ono,M.S.; Guimarães,D.D.
Neurogenic hypertension has been the subject of extensive research worldwide. This review is based on the premise that some forms of neurogenic hypertension are caused in part by the formation of angiotensin-II (Ang-II)-induced reactive oxygen species along the subfornical organ-paraventricular nucleus of the hypothalamus-rostral ventrolateral medulla pathway (SFO-PVN-RVLM pathway). We will discuss the recent contribution of our laboratory and others regarding the mechanisms by which neurons in the SFO (an important circumventricular organ) are activated by Ang-II, how the SFO communicates with two other important areas involved in sympathetic activity regulation (PVN and RVLM) and how Ang-II-induced reactive oxygen species participate along the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Superoxide; Sympathetic; Angiotensin; Subfornical organ; Paraventricular nucleus of the hypothalamus; Rostral ventrolateral medulla.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000900007

Regulation and function of neurogenesis in the adult vertebrate brain
Provedor de dados: 56
Autores: Mendez-Otero,R.; Zaverucha-do-Valle,C.; Gubert,F.; Freitas,G.R. de; Santiago,M.F.
Most adult tissues retain a reservoir of self-renewing, multipotent stem cells that can generate differentiated tissue components. Until recently, the brain was thought to be an exception to this rule and for many years the pervasive dogma of neurobiology relegated neurogenesis to the embryonic and earlier postnatal stages of development. The discovery of constant neuronal replacement in the adult brain has changed the way we think about neurological diseases and about the exploration of new strategies for brain repair. In this review we will explore the potential of adult neural stem cells and we will present some of our own work on this subject. We will also discuss the possibility that adult neurogenesis and neuronal replacement may also play a role in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neural stem cells; Adult neurogenesis; 9-O-acetyl GD3; Gangliosides.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001000012

Insect juvenile hormone: from "status quo" to high society
Provedor de dados: 56
Autores: Hartfelder,K.
Juvenile hormone (JH) exerts pleiotropic functions during insect life cycles. The regulation of JH biosynthesis by neuropeptides and biogenic amines, as well as the transport of JH by specific binding proteins is now well understood. In contrast, comprehending its mode of action on target organs is still hampered by the difficulties in isolating specific receptors. In concert with ecdysteroids, JH orchestrates molting and metamorphosis, and its modulatory function in molting processes has gained it the attribute "status quo" hormone. Whereas the metamorphic role of JH appears to have been widely conserved, its role in reproduction has been subject to many modifications. In many species, JH stimulates vitellogenin synthesis and uptake. In mosquitoes,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Juvenile hormone; Corpora allata; Metamorphosis; Insect reproduction; Polymorphism; Honey bee.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000200003

Topographic aspects of photic driving in the electroencephalogram of children and adolescents
Provedor de dados: 56
Autores: Lazarev,V.V.; Infantosi,A.F.C.; Valencio-de-Campos,D.; Azevedo,L.C. de.
The electroencephalogram amplitude spectra at 11 fixed frequencies of intermittent photic stimulation of 3 to 24 Hz were combined into driving "profiles" for 14 scalp points in 8 male and 7 female normal subjects aged 9 to 17 years. The driving response varied over frequency and was detected in 70 to 100% of cases in the occipital areas (maximum) and in 27 to 77% of cases in the frontal areas (minimum) using as a criterion peak amplitude 20% higher than those of the neighbors. Each subject responded, on average, to 9.7 ± 1.15 intermittent photic stimulation frequencies in the right occipital area and to 6.8 ± 1.97 frequencies in the right frontal area. Most of the driving responses (in relation to the previous background) were significant according to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Electroencephalogram; Intermittent photic stimulation; Photic driving; Brain topography; Children; Adolescents.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000600014

Control of CD4 gene expression: connecting signals to outcomes in T cell development
Provedor de dados: 56
Autores: Sarafova,S.D.; Siu,G.
The control of CD4 gene expression is essential for proper T lymphocyte development. Signals transmitted from the T-cell antigen receptor (TCR) during the thymic selection processes are believed to be linked to the regulation of CD4 gene expression during specific stages of T cell development. Thus, a study of the factors that control CD4 gene expression may lead to further insight into the molecular mechanisms that drive thymic selection. In this review, we discuss the work conducted to date to identify and characterize the cis-acting transcriptional control elements in the CD4 locus and the DNA-binding factors that mediate their function. From these studies, it is becoming clear that the molecular mechanisms controlling CD4 gene expression are very...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CD4; Gene expression; Silencer; T cell; Development.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700001

Genetic engineering of baker's and wine yeasts using formaldehyde hyperresistance-mediating plasmids
Provedor de dados: 56
Autores: Schmidt,M.; Cömer,A.; Grey,M.; Brendel,M.
Yeast multi-copy vectors carrying the formaldehyde-resistance marker gene SFA have proved to be a valuable tool for research on industrially used strains of Saccharomyces cerevisiae. The genetics of these strains is often poorly understood, and for various reasons it is not possible to simply subject these strains to protocols of genetic engineering that have been established for laboratory strains of S. cerevisiae. We tested our vectors and protocols using 10 randomly picked baker's and wine yeasts all of which could be transformed by a simple protocol with vectors conferring hyperresistance to formaldehyde. The application of formaldehyde as a selecting agent also offers the advantage of its biodegradation to CO2 during fermentation, i.e., the selecting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yeast; Transformation; Hyperresistance to formaldehyde.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200004

Collagenase specificity in chondrosarcoma metastasis
Provedor de dados: 56
Autores: Scully,S.P.; Berend,K.R.; Qi,W.-N.; Harrelson,J.M.
The treatment of some mesenchymal malignancies has made significant gains over the past few decades with the development of effective systemic therapies. In contrast, the treatment of chondrosarcoma has been limited to surgical resection, with the most significant prognostic indicators being surgical margins and histologic grade. We have reported that MMP-1/TIMP-1 gene expression serves to prognosticate for tumor recurrence in this group of patients. This led to the hypothesis that collagenase activity facilitates cell egression from the cartilaginous matrix. In the current study we examine the specificity of collagenase gene expression in archival human chondrosarcoma samples using semi-quantitative PCR. Messenger RNA was affinity extracted and subject to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chondrosarcoma; Metastasis; Collagenase; Gene expression; Prognosis.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700013

Effect of maternal hydration on the increase of amniotic fluid index
Provedor de dados: 56
Autores: Borges,V.T.M.; Rososchansky,J.; Abbade,J.F.; Dias,A.; Peraçoli,J.C.; Rudge,M.V.C.
The objective of this study was to determine the effect of maternal hydration with oral isotonic solution and water on the amniotic fluid (AF) index of women with normohydramnios. Women with a normal AF index and gestational age between 33 and 36 weeks without maternal complications were randomized into three groups [isotonic solution (Gatorade®), water, control]. The isotonic solution and water groups were instructed to drink 1.5 L of the respective solution and the control group was instructed to drink 200 mL water over a period of 2 to 4 h. AF index was measured before and after hydration by Doppler ultrasonography. The investigator performing the AF index measurement was blind to the subject’s group. Ninety-nine women completed the study without any...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amniotic fluid index; Maternal oral hydration; Isotonic solution.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000300015

Are high-lysine cereal crops still a challenge?
Provedor de dados: 56
Autores: Ferreira,R.R.; Varisi,V.A.; Meinhardt,L.W.; Lea,P.J.; Azevedo,R.A.
The essential amino acids lysine and threonine are synthesized in higher plants via a pathway starting with aspartate that also leads to the formation of methionine and isoleucine. Lysine is one of most limiting amino acids in plants consumed by humans and livestock. Recent genetic, molecular, and biochemical evidence suggests that lysine synthesis and catabolism are regulated by complex mechanisms. Early kinetic studies utilizing mutants and transgenic plants that over-accumulate lysine have indicated that the major step for the regulation of lysine biosynthesis is at the enzyme dihydrodipicolinate synthase. Despite this tight regulation, recent strong evidence indicates that lysine catabolism is also subject to control, particularly in cereal seeds. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lysine; Threonine; Aspartate; Nutritionally improved crops; Methionine; Amino acids.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700002

Central chemoreceptors and neural mechanisms of cardiorespiratory control
Provedor de dados: 56
Autores: Takakura,A.C.; Damasceno,R.S.; Falquetto,B.; Totola,L.T.; Sobrinho,C.R.; Ragioto,D.T.; Zolezi,F.P.
The arterial partial pressure (P CO2) of carbon dioxide is virtually constant because of the close match between the metabolic production of this gas and its excretion via breathing. Blood gas homeostasis does not rely solely on changes in lung ventilation, but also to a considerable extent on circulatory adjustments that regulate the transport of CO2 from its sites of production to the lungs. The neural mechanisms that coordinate circulatory and ventilatory changes to achieve blood gas homeostasis are the subject of this review. Emphasis will be placed on the control of sympathetic outflow by central chemoreceptors. High levels of CO2 exert an excitatory effect on sympathetic outflow that is mediated by specialized chemoreceptors such as the neurons...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemoreflex; Cardiorespiratory responses; Ventrolateral medulla; Sympathetic nerve activity; Phrenic nerve activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000900009

Developmental norms for the Gardner Steadiness Test and the Purdue Pegboard: a study with children of a metropolitan school in Brazil
Provedor de dados: 56
Autores: Brito,G.N.O.; Santos-Morales,T.R.
Norms for the Gardner Steadiness Test and the Purdue Pegboard were developed for the neuropsychological assessment of children in the metropolitan area of Rio de Janeiro. A computer-generated unbiased sample of 346 children with a mean age of 9.4 years (SD = 2.76), who were attending a large normal public school in this urban area, was the subject of this study. Two boys were removed from the study, one for refusing to participate and the other due to severe strabismus. Therefore, the final sample contained 344 children (173 boys and 171 girls). Sex and age of the child and hand preferred for writing, but not ethnic membership or social class, had significant effects on performance in the Gardner Steadiness Test and the Purdue Pegboard. Girls outperformed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neuropsychology; Assessment instruments; Norms; Development; Cross-cultural differences; Manual differences; Sex differences; Brazil; Metropolitan children.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000800011

Structural, functional and immunological studies on a polymeric bacterial protein
Provedor de dados: 56
Autores: Baldi,P.C.; Velikovsky,C.A.; Braden,B.C.; Giambartolomei,G.H.; Fossati,C.A.; Goldbaum,F.A.
The characterization of proteins from Brucella spp, the causative agent of brucellosis, has been the subject of intensive research. We have described an 18-kDa cytoplasmic protein of Brucella abortus and shown the potential usefulness of this protein as an antigen for the serologic diagnosis of brucellosis. The amino acid sequence of the protein showed a low but significant homology with that of lumazine synthases. Lumazine is an intermediate product in bacterial riboflavin biosynthesis. The recombinant form of the 18-kDa protein (expressed in E. coli) folds like the native Brucella protein and has lumazine-synthase enzymatic activity. Three-dimensional analysis by X-ray crystallography of the homolog Bacillus subtilis lumazine synthase has revealed that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brucella lumazine synthase; X-ray structure; Immunogenicity; Brucellosis detection; Bacillus subtilis lumazine synthase.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000700003

Interaction between affordance and handedness recognition: a chronometric study
Provedor de dados: 56
Autores: Lameira,A.P.; Pereira,A.; Conde,E.; Gawryszewski,L.G.
The visualization of tools and manipulable objects activates motor-related areas in the cortex, facilitating possible actions toward them. This pattern of activity may underlie the phenomenon of object affordance. Some cortical motor neurons are also covertly activated during the recognition of body parts such as hands. One hypothesis is that different subpopulations of motor neurons in the frontal cortex are activated in each motor program; for example, canonical neurons in the premotor cortex are responsible for the affordance of visual objects, while mirror neurons support motor imagery triggered during handedness recognition. However, the question remains whether these subpopulations work independently. This hypothesis can be tested with a manual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Affordance; Handedness recognition; Manual reaction time; Motor imagery; Mirror neurons.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000400316

Biotechnology of polyketides: new breath of life for the novel antibiotic genetic pathways discovery through metagenomics
Provedor de dados: 58
Autores: Gomes,Elisângela Soares; Schuch,Viviane; Lemos,Eliana Gertrudes de Macedo.
The discovery of secondary metabolites produced by microorganisms (e.g., penicillin in 1928) and the beginning of their industrial application (1940) opened new doors to what has been the main medication source for the treatment of infectious diseases and tumors. In fact, approximately 80 years after the discovery of the first antibiotic compound, and despite all of the warnings about the failure of the "goose that laid the golden egg," the potential of this wealth is still inexorable: simply adjust the focus from "micro" to "nano", that means changing the look from microorganisms to nanograms of DNA. Then, the search for new drugs, driven by genetic engineering combined with metagenomic strategies, shows us a way to bypass the barriers imposed by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental samples; Pharmacology; PKSs; New drugs.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400002

Distribution of biotypes and leukotoxic activity of Aggregatibacter actinomycetemcomitans isolated from Brazilian patients with chronic periodontitis
Provedor de dados: 58
Autores: Gaetti-Jardim Jr.,Elerson; Wahasugui,Thais Cristiane; Tomazinho,Paulo Henrique; Marques,Márcia Martins; Nakano,Viviane; Avila-Campos,Mario Julio.
Aggregatibacter actinomycetemcomitans is an important etiologic agent of the periodontitis and is associated with extra-oral infections. In this study, the detection of the ltxA gene as well as the ltx promoter region from leukotoxic A. actinomycetemcomitans isolated from 50 Brazilian patients with periodontitis and 50 healthy subjects was performed. The leukotoxic activity on HL-60 cells was also evaluated. Leukotoxic activity was determined using a trypan blue exclusion method. The 530 bp deletion in the promoter region was evaluated by PCR using a PRO primer pair. A. actinomycetemcomitans was detected by culture and directly from crude subgingival biofilm by PCR using specific primers. By culture, A. actinomycetemcomitans was detected in nine (18%) of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biotype; Leukotoxin; Periodontitis.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400011

Association between the concentration of protozoa and surrogates in effluents of the slow sand filtration for water treatment
Provedor de dados: 58
Autores: Heller,Léo; Vieira,Maria Berenice Cardoso Martins; Brito,Ludmila Ladeira Alves de; Salvador,Daniella Pedrosa.
Currently, a major challenge on producing high-quality drinking water is to monitor pathogens, such as Giardia, Cryptosporidium and enteric viruses. Due to limitations of the analytical methods available to detect pathogens in water, the research of surrogate indicators is an up-to-date subject. In view of these aspects, a pilot scale study was performed to evaluate the association between microbiological and physical indicators and the presence of Giardia spp and Cryptosporidium sp in the effluent of upflow and downflow slow sand filters. The results showed that efficient bacterial removal could indicate suitable protozoa removal. Although coliforms and Escherichia coli do not present the appropriate physiological profile for an "ideal" indicator, they...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptosporidium; Giardia; Slow sand filtration; Surrogate; Microbiological indicator.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200029

Keratinolytic abilities of Micrococcus luteus from poultry waste
Provedor de dados: 58
Autores: Laba,Wojciech; Choinska,Anna; Rodziewicz,Anna; Piegza,Michal.
Keratinolytic microorganisms have become the subject of scientific interest due to their ability to biosynthesize specific keratinases and their prospective application in keratinic waste management. Among several bacterial classes, actinobacteria remain one of the most important sources of keratin-degrading strains, however members of the Micrococcaceae family are rarely scrutinized in regard to their applicatory keratinolytic potential. The tested Micrococcus sp. B1pz isolate from poultry feather waste was identified as M. luteus. The strain, grown in the medium with 1–2% chicken feathers and a yeast extract supplement, produced keratinases of 32 KU and lower level of proteases, 6 PU. It was capable to effectively decompose feathers or “soft” keratin of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micrococcus luteus; Keratinase; Keratin; Biodegradation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300691

Floating microspheres: a review
Provedor de dados: 60
Autores: Mukund,Jagtap Yogesh; Kantilal,Bhujbal Rohan; Sudhakar,Ranpise Nisharani.
Gastric emptying is a complex process, one that is highly variable and that makes in vivo performance of drug delivery systems uncertain. A controlled drug delivery system with prolonged residence time in the stomach can be of great practical importance for drugs with an absorption window in the upper small intestine. The main limitations are attributed to the inter- and intra-subject variability of gastro-intestinal (GI) transit time and to the non-uniformity of drug absorption throughout the alimentary canal. Floating or hydrodynamically controlled drug delivery systems are useful in such applications. Various gastroretentive dosage forms are available, including tablets, capsules, pills, laminated films, floating microspheres, granules and powders....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floating microspheres; Emulsion solvent diffusion-evaporation method; Drug delivery system; Release modifiers.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000100003

Systematic review protocol: following PRISMA guide from Cochrane to generate evidence as treatment effect of pharmaceutical care for hypertension in primary care
Provedor de dados: 60
Autores: Cazarim,Maurílio de Souza; Reis,Tiago Marques dos; Cruz-Cazarim,Estael Luzia Coelho da; Pereira,Leonardo Régis Leira.
Pharmaceutical care (PC) is in the implementation process in Brazil and Latin America. Synthesis of evidence has been requested for monitoring and evaluating the process regarding the treatment effect. The objective is to build and disseminate a systematic review protocol to make a standard for updating results from pharmaceutical care for hypertension and for other diseases. This is a protocol for systematic review studies regarding a real example of a protocol reasoned in pharmaceutical care for hypertension in primary care. This protocol was delineated grounded in the Cochrane Handbook. Descriptors and words were defined using MeSH (Medical Subject Headings), DeCS (Descriptors in Health Sciences) and Emtree thesaurus, and the search was performed in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pharmaceutical services; Hypertension; Primary health care; Review literature as topic; Evidence-based medicine.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100620

Diagnosis of the availability and use of drug information sources in drugstores and pharmacies in southern Brazil
Provedor de dados: 60
Autores: Hennigen,Fabiana Wahl; Fischer,Maria Isabel; Camargo,Aline Lins; Heineck,Isabela.
This research has aimed to estimate the use of drug information sources by pharmacists in drugstores and pharmacies in southern Brazil. It consisted of sending a questionnaire through regular mail, contacting the pharmacist via phone and visiting the drugstores. Four hundred and eight (68.6%) of the 595 enrolled establishments answered the questionnaire. The information at pharmacies and drugstores is searched mainly to orient the patient. At drugstores the professionals have an average of 2.3 books, whereas at pharmacies they rely on 6.1. In a pharmacy, the chance to find more than five books is 27 times higher than in a drugstore. The more often available books are pharmaceutical specialties compendiums. There is access to Internet in 87.5% of pharmacies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pharmaceutical assistance; Drugs/information availability; Pharmaceutical practice.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000200014

The influence of pH, polyethylene glycol and polyacrylic acid on the stability of stem bromelain
Provedor de dados: 60
Autores: Novaes,Letícia Celia de Lencastre; Jozala,Angela Faustino; Mazzola,Priscila Gava; Júnior,Adalberto Pessoa.
Enzyme stability is critical in biotechnology, pharmaceutical and cosmetic industries. Investigations on this subject have drawn attention because of its practical application. Bromelain is a thiol-endopeptidase, obtained from pineapple (Ananas comosus), known for its clinical and therapeutic applications, particularly to selective burn debridement and improvement of antibiotic action and anti-inflammatory activities. To date, the use of bromelain in pharmacological or industrial applications is limited, due to commercial availability, costs, and sensitivity to pH and temperature. Therefore, a better understanding of enzyme stability would be of great interest. The aim of this study was to evaluate bromelain activity and stability in several pH (2.0 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromelain/pH stability; Polyethylene glycol/enzyme stability; Polyacrylic acid/enzyme stability; Enzyme/stability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502014000200371

The metabolic response of plants to oxygen deficiency
Provedor de dados: 61
Autores: Sousa,Carlos Antônio Ferreira de; Sodek,Ladaslav.
Plants, under natural or experimental conditions, can be subject to a range of O2 concentrations from normal (normoxia) through deficient (hypoxia) to total absence (anoxia). Many metabolic processes are affected by O2 deficiency but the most studied events are those related to respiration and metabolism of N. In the absence of a terminal electron acceptor for the electron transport chain, the tricarboxylic acid cycle functions only partially and in both directions. Acidification of the cytosol occurs and pyruvate, the product of glycolysis, is transformed to lactate and ethanol, which represent the main fermentation reactions in plants. Alanine is the third most important product of anaerobic metabolism, resulting from high rates of amino acid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anoxia; Hypoxia; N metabolism; Fermentation products.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000200002

Apoplasm hydrostatic pressure on growth of cylindrical cells
Provedor de dados: 61
Autores: Pessoa,José Dalton Cruz; Calbo,Adonai Gimenes.
According to the model frequently used as reference, plant cell growth occurs only when turgor surpasses a threshold. This model was proposed considering a cylindrical cell of constant wall thickness immerged in a water solution, with viscoelastic behaviour, hydraulic conductivity, variable extensibility, and unidirectional elongation. The author, Lockhart (1965), did not consider the effects of apoplasm hydrostatic potential, a subject treated later by Calbo and Pessoa (1994) who argued that this component of cell potential would interfere with cell growth rate. To evaluate this effect, where possible the same deductive procedures as those employed by Lockhart were used here, which resulted in a set of equivalent equations for cell growth, turgor and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoplasm; Cell wall; Growth; Lockhart; Model; Plant.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100003

Imagen, objeto y arte: la fotografía de Guido Boggiani (Dossier)
Provedor de dados: 122
Autores: Reyero, Alejandra.
El objetivo de este trabajo es reflexionar sobre el uso que hacia 1890-1900 tuvieron  las imágenes fotográficas de Guido Boggiani entre los indígenas chamacoco o ishir del Chaco paraguayo, a partir de una lectura actual –en clave hermenéutica– del material historiográfico existente sobre el tema.  Para ello recurrimos a la perspectiva interpretativa de Alfred Gell y su lógica agentiva de los hechos sociales, así como a la problematización de Michael Taussig sobre la capacidad mimética de la fotografía; para finalmente discutir la circulación actual de las fotografías de Boggiani en espacios de arte.
Tipo: Artículo
Palavras-chave: GRAN CHARCO; CHAMACOCO; MUERTE; MIMESIS; FOTOGRAFÍAS; ARTE; DEATH; PHOTOGRAPHY; ART; PARAGUAY.
Ano: 2012
URL: http://hdl.handle.net/10469/3503

La naturaleza como sujeto de derechos : materializaci??n de los derechos, mecanismos procesales y la incidencia social en el Ecuador
Provedor de dados: 122
Autores: Ram??rez V??lez, Pablo Mauricio.
El Ecuador ha vivido desde su retorno a la democracia, a finales de la d??cada de los setentas, por tres diferentes procesos de aceptaci??n de su normativa constitucional.  Estas constituciones que fueron consultadas o aprobadas por los ecuatorianos v??a refer??ndum o consulta popular han marcado hitos tanto sociales como jur??dicos. El estudio de la evoluci??n y avances con respecto a los temas ambientales lleva a la necesidad de profundizar en varios aspectos jur??dicos y sus incidencias sociales, as?? como su aplicaci??n.  Mediante la Constituci??n Ecuatoriana, aprobada por refer??ndum en septiembre del 2008, la Naturaleza, como sujeto abstracto, obtuvo el reconocimiento de sujeto de derecho. En el art??culo 10 de la norma suprema se establece que:...
Tipo: Tesis
Palavras-chave: ECUADOR; NATURALEZA; SUJETOS DE DERECHO; LEGISLACI??N; DERECHOS AMBIENTALES; CONSTITUCI??N POL??TICA; IND??GENAS; DERECHOS DE LA NATURALEZA; COSMOVISI??N; NATURE; SUBJECT OF LAW; LEGISLATION; ENVIRONMENTAL RIGHTS; CONSTITUTION; INDIGENOUS; RIGHTS OF NATURE; WORLDVIEW.
Ano: 2012
URL: http://hdl.handle.net/10469/5308

Perspectivas pol íticas tras los primeros d as de gobierno (Análisis de Coyuntura)
Provedor de dados: 122
Autores: Castro Riera, Carlos.
En nuestro país se ha vuelto una costumbre esperar que los gobiernos de turno cumplan cien días para entonces empezar a disparar críticas o, en raras ocasiones, hacer un balance objetivo. Lo particular en el caso de este gobierno es que, ya desde el día mismo de su posesión, recibió la amenaza de guerra. Incluso un diputado joven, pero con mentalidad vieja, evocó la ‘reacción pinochetista’ como posible respuesta a la ‘revolución ciudadana’ que había convocado el flamante presidente.  Ya iniciada la gestión de gobierno del presidente Rafael Correa, las fuerzas políticas conservadoras  no han cejado en su lucha contra de la Asamblea Nacional Constituyente. Su oposición se ha manifestado de maneras distintas en diferentes momentos. Al principio, fue abierta....
Tipo: Artículo
Palavras-chave: PERSPECTIVAS; GOBIERNO; ANTIDEMOCRÁTICO; PODER; ARBITRARIO; AUTORITARIO; PODER CONSTITUYENTE; ESTABILIDAD; EMPRESARIOS; PLAN DE DESARROLLO; POLÍTICAS PÚBLICAS; POLÍTICA INTERNACIONAL; DIGNIDAD; SOBERANÍA; MEDIOS DE COMUNICACIÓN; POLÍTICA; OBJETIVIDAD; ÉTICA; CANDIDATO; PRESIDENTE DE LA REPÚBLICA; SUJETO POLÍTICO; ECUADOR; OUTLOOK; GOVERNMENT; ANTIDEMOCRATIC; POWER; ARBITRARY; AUTHORITARIAN; CONSTITUENT POWER; STABILITY; ENTREPRENEURS; DEVELOPMENT PLAN; ASSISTANCE HUMANIST; PUBLIC POLICY; INTERNATIONAL POLICY; DIGNITY; SOVEREIGNTY; MEDIA; POLICY; OBJECTIVITY; ETHICS; CANDIDATE; PRESIDENT OF THE REPUBLIC; POLITICAL SUBJECT.
Ano: 2007
URL: http://hdl.handle.net/10469/4993

Subjetividad en la ciencia : crítica a la razón neo-positivista
Provedor de dados: 122
Autores: Rodríguez, Francisco.
El tema de la subjetividad en la ciencia no es nuevo pero ante la coyuntura epistemológica del derrumbamiento del paradigma del positivismo verificacionista hoy, surge con mucha fuerza la necesidad de plantear la consideración de paradigmas emergentes que la definan como su fundamento lógico-epistémico. Esto no significa el advenimiento del reino de la arbitrariedad y el subjetivismo egocéntrico, sino la toma de distancia del objetivismo cosificante y la consideración del sujeto como estatuto central en el proceso de la producción de conocimientos científicos.
Tipo: Artículo
Palavras-chave: CIENCIA; SUBJETIVISMO; NEO-POSITIVISMO; EPISTEMOLOGÍA; CONOCIMIENTO; SCIENCE; SUBJETIVISM; NEO-POSITIVISM; EPISTEMOLOGY; KNOWLEDGE.
Ano: 2012
URL: http://hdl.handle.net/10469/3853

Perspectivas pol íticas tras los primeros d as de gobierno (Análisis de Coyuntura)
Provedor de dados: 122
Autores: Castro Riera, Carlos.
En nuestro país se ha vuelto una costumbre esperar que los gobiernos de turno cumplan cien días para entonces empezar a disparar críticas o, en raras ocasiones, hacer un balance objetivo. Lo particular en el caso de este gobierno es que, ya desde el día mismo de su posesión, recibió la amenaza de guerra. Incluso un diputado joven, pero con mentalidad vieja, evocó la ‘reacción pinochetista’ como posible respuesta a la ‘revolución ciudadana’ que había convocado el flamante presidente. Ya iniciada la gestión de gobierno del presidente Rafael Correa, las fuerzas políticas conservadoras no han cejado en su lucha contra de la Asamblea Nacional Constituyente. Su oposición se ha manifestado de maneras distintas en diferentes momentos. Al principio, fue abierta....
Tipo: Artículo
Palavras-chave: PERSPECTIVAS; GOBIERNO; ANTIDEMOCRÁTICO; PODER; ARBITRARIO; AUTORITARIO; PODER CONSTITUYENTE; ESTABILIDAD; EMPRESARIOS; PLAN DE DESARROLLO; POLÍTICAS PÚBLICAS; POLÍTICA INTERNACIONAL; DIGNIDAD; SOBERANÍA; MEDIOS DE COMUNICACIÓN; POLÍTICA; OBJETIVIDAD; ÉTICA; CANDIDATO; PRESIDENTE DE LA REPÚBLICA; SUJETO POLÍTICO; ECUADOR; OUTLOOK; GOVERNMENT; ANTIDEMOCRATIC; POWER; ARBITRARY; AUTHORITARIAN; CONSTITUENT POWER; STABILITY; ENTREPRENEURS; DEVELOPMENT PLAN; ASSISTANCE HUMANIST; PUBLIC POLICY; INTERNATIONAL POLICY; DIGNITY; SOVEREIGNTY; MEDIA; POLICY; OBJECTIVITY; ETHICS; CANDIDATE; PRESIDENT OF THE REPUBLIC; POLITICAL SUBJECT.
Ano: 2007
URL: http://hdl.handle.net/10469/4993

Retos de la diversidad: el reconocimiento y aplicación de los sistemas de derecho indígenas ecuatorianos (Coyuntura)
Provedor de dados: 122
Autores: García S., Fernando.
Este texto analiza el derrotero seguido por los sistemas de derecho de las nacionalidades indígenas ecuatorianas desde su aprobación en la Constitución de 1998 hasta la fecha y su relación con el sistema de derecho ordinario. Con este fin se realiza un acercamiento a la vigencia de la Constitución de 1998 y el de su implementación efectiva hasta el 2008, fecha en la que se aprobó la Constitución actual. Se concluye señalando algunos retos a futuro que plantea el tema de los sistemas de derecho indígena y su relación con la justicia ordinaria.
Tipo: Artículo
Palavras-chave: DERECHO INDIGENA; DERECHOS CONSTITUCIONALES; MULTICULTURALISMO; DIALOGO INTERÉTNICO; ECUADOR; INDIGENOUS JUSTICE; CONSTITUTIONAL RIGHTS; MULTICULTURALISM; INTERETHNIC DIALOGUE.
Ano: 2010
URL: http://hdl.handle.net/10469/2572

Subjetividad en la ciencia : crítica a la razón neo-positivista
Provedor de dados: 122
Autores: Rodríguez, Francisco.
El tema de la subjetividad en la ciencia no es nuevo pero ante la coyuntura epistemológica del derrumbamiento del paradigma del positivismo verificacionista hoy, surge con mucha fuerza la necesidad de plantear la consideración de paradigmas emergentes que la definan como su fundamento lógico-epistémico. Esto no significa el advenimiento del reino de la arbitrariedad y el subjetivismo egocéntrico, sino la toma de distancia del objetivismo cosificante y la consideración del sujeto como estatuto central en el proceso de la producción de conocimientos científicos.
Tipo: Artículo
Palavras-chave: CIENCIA; SUBJETIVISMO; NEO-POSITIVISMO; EPISTEMOLOGÍA; CONOCIMIENTO; SCIENCE; SUBJETIVISM; NEO-POSITIVISM; EPISTEMOLOGY; KNOWLEDGE.
Ano: 2012
URL: http://hdl.handle.net/10469/3853

Capitalismo extractivo, minería y derechos: ¿Pueden cohabitar? (Coyuntura)
Provedor de dados: 122
Autores: Ortiz T., Pablo.
La conflictividad entre la lógica estatal de uso y explotación de la naturaleza, y la necesidad del propio Estado de generar excedentes o ganancias económicas que le permita satisfacer las demandas de la población es creciente. Por otro lado, persisten las tensiones entre la razón de Estado y los derechos económicos, sociales y políticos de las comunidades locales. Aquella conflictividad y tensión demanda la búsqueda de varios equilibrios y acuerdos, que en la historia reciente ecuatoriana parecen estar lejanos. El texto, a lo largo de tres breves acápites, intenta esbozar algunos elementos a fin de contribuir a la reflexión colectiva, crítica y urgente de este tema.
Tipo: Revista
Palavras-chave: CAPITALISMO EXTRACTIVO; MINERÍA; ESTADO; CONFLICTOS SOCIOAMBIENTALES; DERECHOS COLECTIVOS; EXTRACTIVE CAPITALISM; MINING; STATE; SOCIO-ENVIRONMENTAL CONFLICTS; COLLECTIVE RIGHTS.
Ano: 2011
URL: http://hdl.handle.net/10469/2709

Imagen, objeto y arte: la fotografía de Guido Boggiani (Dossier)
Provedor de dados: 122
Autores: Reyero, Alejandra.
El objetivo de este trabajo es reflexionar sobre el uso que hacia 1890-1900 tuvieron las imágenes fotográficas de Guido Boggiani entre los indígenas chamacoco o ishir del Chaco paraguayo, a partir de una lectura actual –en clave hermenéutica– del material historiográfico existente sobre el tema.  Para ello recurrimos a la perspectiva interpretativa de Alfred Gell y su lógica agentiva de los hechos sociales, así como a la problematización de Michael Taussig sobre la capacidad mimética de la fotografía; para finalmente discutir la circulación actual de las fotografías de Boggiani en espacios de arte.
Tipo: Artículo
Palavras-chave: GRAN CHARCO; CHAMACOCO; MUERTE; MIMESIS; FOTOGRAFÍAS; ARTE; DEATH; PHOTOGRAPHY; ART; PARAGUAY.
Ano: 2012
URL: http://hdl.handle.net/10469/3503

Pecosa-Baer: A New Cultivar of New Cultivar Cultivar of White Lupin with Determined Bushy Growth Habit, Sweet Grain and High Protein Content
Provedor de dados: 117
Autores: von Baer,Erik; von Baer,Ingrid; Riegel,Ricardo.
The expansion of white lupin (Lupinus albus L.) cultivation in Chile is subject to the availability of cultivars presenting high yield potential, tolerance to the main fungal diseases and homogeneous ripening. In response to these requirements, a new cultivar has been developed and registered as ‘Liapec-&gt;1’, commercially registered as ‘Pecosa-Baer’. This new cultivar has determined bushy growth habit. Its flowering period is concentrated in approximately 40 days, less than the 77 days of cv. Rumbo-Baer. This trait allows it to reach harvest without heterogeneity problems. The seed is speckled, flat and medium-sized (370 g/1000 grains aprox.). The kernels are sweet and have a high protein content of around 41% (dry matter basis). In field assays,...
Tipo: Journal article
Palavras-chave: Cultivar.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000400013

Evaluation of the Impact of Climatic Change on the Economic Value of Land in Agricultural Systems in Chile
Provedor de dados: 117
Autores: González U,Jorge ; Velasco H,Roberto .
Climatic change will affect crop yields and management. By the year 2050, the mean temperature could increase by 1.5 ºC; and by the year 2100 between 1.0 to 3.5 ºC. There are few studies on this subject in Chile. At the international level, estimated climatic changes in temperate and tropical zones could negatively affect wheat (Triticum vulgare L.) and corn (Zea mays L.) production, as examples. The objective of this study was to determine the relationship between agricultural systems and climatic change by using the Ricardian Method. Specific objectives were to evaluate and quantify the relationship of climatic variables (precipitation and temperature) with economic variables under several realities of farms, to simulate the impact of scenarios of...
Tipo: Journal article
Palavras-chave: Climate change; Ricardian method; Land productivity; Land value; Policy of adaptation.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100006

Short Term Impact of the Chilean Journal of Agricultural Research: A Bibliometric Analysis
Provedor de dados: 117
Autores: Krauskopf,Erwin.
In January 2007, the Chilean Journal of Agricultural Research was indexed by the Institute of Scientific Information (ISI). This paper reviews the research that has been published since 2007 by using records extracted from the Web of Science database. The papers published were mostly affiliated to researchers from Chile, and six out of the ten most-contributing countries were from Latin America. The analysis by institutions showed Universidad de Concepcion as the most prolific, although this result is not valid. A lack of standardization in the manner the Instituto de Investigaciones Agropecuarias (INIA) subscribed its address on each paper caused a disaggregation of the information. This was proven by the manual curation of each record that was affiliated...
Tipo: Journal article
Palavras-chave: Bibliometric; Epistemometry; Scientific productivity; Chile.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100026

Horizontal arrangements: strategy for reducing the asymmetry information for dairy farmers in Paraná, Brazil
Provedor de dados: 65
Autores: Brito,Marcel Moreira de; Bánkuti,Ferenc Istvan; Bánkuti,Sandra Mara Schiavi; Ferreira,Maria Clara Melo; Damasceno,Júlio César; Santos,Geraldo Tadeu dos; Zambom,Maximiliane Alavarse.
An empirical investigation was conducted to study whether dairy farmers involved in horizontal arrangements (HA) have lower information asymmetry than those who do not participate in HA. Our assumption is that greater access to information results in fewer risky decisions in production systems. One hundred and twenty semi-structured questionnaires were applied to dairy farmers located in four different geographical regions in Paraná State, Brazil. Exploratory factor analysis was used to define factors related to information asymmetry in dairy agribusiness system (DAS) and four factors were defined. In a second step, the 120 dairy farmers were split into two groups: the first one involved in HA and the second one not involved in HA. Mean test (t-student)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Business networking; Cooperation; Dairy agribusiness system.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102069

Short food supply chain: characteristics of a family farm
Provedor de dados: 65
Autores: Aguiar,Luane da Conceição; DelGrossi,Mauro Eduardo; Thomé¹,Karim Marini.
ABSTRACT: Short Food Supply Chains (SFSCs) provide a dependable substitute for conventional supply chains, as their food reflects the characteristics of “local”, “natural”, “healthy” and “reliable”. For the family farmer, the short chains constitute anexcellent way of diversifying their produce, gaining higher added value and thus warranting steadier revenues. This paper thus aims to discern the distinguishing features that the short chains offer, in general, to the family farm. To accomplish this, a literature review was performed to study the works done and approaches conducted on the short chains in the academy, in terms of family farm, and identify their specifications. Positive characteristics related to family farmers were recognizable in comparison...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Short chains; Short circuits; Food chains; Family farm.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000500800

Presence of anti-Leptospira spp. antibodies in captive yellow-spotted river turtles (Podocnemis unifilis) in the Eastern Amazon
Provedor de dados: 65
Autores: Miranda,Juliana Maria Santos; Rocha,Katarine de Souza; Monteiro,Louysse Helene; Baia,Ianny Watuzy Monteiro; Monteiro,Thamillys Rayssa Marques; Brito,Jacqueline da Silva; Mesquita,Ellen Yasmin Eguchi; Moraes,Carla Cristina Guimarães de.
ABSTRACT: We describe anti-Leptospira spp. agglutinin in yellow-spotted river turtles (Podocnemis unifilis)in the Amazon region. Ninety-eight serum samples from individuals housed at the Bosque Rodrigues Alves Zoobotanical Garden of Amazonia, Belém, PA, Brazil, were subject to the microscopic agglutination test (MAT) using 19 different Leptospira spp. antigen serogroups. Thirty-four of the 98 samples (35%) were reactive, with titers ranging from 100 to 3200, and eight 8 reactive samples (23.5%) co-agglutinated under two or more serovars.The most common serogroup was Hebdomadis (26.9%, 7/26), followed by Semaranga (23%, 6/26), Shermani (19.2%, 5/26), Djasiman (11.5%, 3/26), and Australis (7.7%, 2/26); Bataviae, Javanica, and Sejroewere represented by a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Testudines; Microscopic agglutination test; Hebdomadis; Amazon Region.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100451

Plant breeding and in situ utilization of palm trees
Provedor de dados: 65
Autores: Rivas,Mercedes; Barbieri,Rosa Lía; Maia,Luciano Carlos da.
The palm tree family (Arecaceae) is constituted by approximately 3000 species mainly distributed in the tropics and subtropics. As a source of a variety of products they contribute to the world and local economies, and also to peoples lifestyles. Historically their use has been based on wild populations, but also on local domestication. Very few species are subject of plant breeding programs and are cultivated in the world. This is the case of the African oil palm (Elaeis guineensis), in which investment and development consortiums invest high sums. Another kind of crop is the date palm (Phoenix dactylifera), which was domesticated thousand of years ago and whose success is based in the export of a fine product with worldwide recognition. In this case the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arecaceae; Elaeis guineenis; Phoenix dactylifera; Domestication; In situ management.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000200013

Soil changes in a subtropical seasonal forest chronosequences in the south of Brazil
Provedor de dados: 65
Autores: Kilca,Ricardo de Vargas; Pedron,Fabrício de Araújo; Schwartz,Gustavo; Longhi,Solon Jonas; Deobald,Gabriel Antônio.
ABSTRACT: The abandonment of field crops and the vegetation recovery in exhausted soils have been a recently studied subject as a way to assess the forest role on the soil recovering. The aim of this study was assess changes in the chemical(14 variables) and grain size (sand, silt, and clay) soil features in four forests chronosequences grew over abandoned field crops in the edge of the Brazilian Southern plateau, Rio Grande do Sul State. There were selected 25 forests aging from 5 to &gt;100 years old in areas of slopes and highlands where samples of Leptosols and Regosols were collected at 15cm in depth. The Fisher's Discriminant Analysis showed that some variable groups of soils can distinguish significantly the soils under different forest ages. Six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Secondary succession; Agriculture impacts; Fisher's Discriminant Analysis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001202174

Dermatological alterations in women working on dairy farm: a case study
Provedor de dados: 65
Autores: Vaz,Marta Regina Cezar; Bonow,Clarice Alves; Borges,Anelise Miritz; Almeida,Marlise Capa Verde de; Rocha,Laurelize Pereira; Severo,Luana de Oliveira.
The present study aims to identify dermatological alterations due to the work carried out by women on dairy farms and presents an intervention process on dermatology health with women working in these locations. It is a quasi-experimental study, in an intervention form, in which each subject is independent. It was performed with 20 women working on a dairy farm in Rio Grande, Rio Grande do Sul, Brazil, between July and October 2011. Most (60%) women identified dermatological changes due to the work. During the intervention, dermatological care action was focused on. The knowledge of these results offers valuable information for those who teach and advice people about dermatological care in rural working places, where such rates of occurrence are high.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Human being; Rural health; Dermatology; Occupational health nursing.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000900014

Industrial processing of canned beans
Provedor de dados: 65
Autores: Schoeninger,Vanderleia; Coelho,Silvia Renata Machado; Bassinello,Priscila Zaczuk.
ABSTRACT: Beans are popular as a protein-filled legume of high nutritional value, being one of the most planted species in the world. However, recent years have seen a decrease in the consumption of beans, owing to the time necessary to cook it domestically. Thus, it is being replaced in people’s diets by other foods. An alternative preparation that supplies modern consumers’ demands is industrially processed beans. This article aimed to provide a literature review on the processing of canned beans. Few recent studies have been performed in Brazil on this subject, as most studies have focused instead on the technological quality of dry bean grains processing. In this article industrial processing concepts and features, production unit operations, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris L.; Canning; Hydration; Blanching.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500780

Mites affecting hen egg production: some considerations for Brazilian farms
Provedor de dados: 65
Autores: Rezende,Leandro do Carmo; Cunha,Lucas Maciel; Teixeira,Cristina Mara; Oliveira,Paulo Roberto de; Martins,Nelson Rodrigo da Silva.
The poultry industry is characterized for its constant search for productivity and profitability, which are based on flock health status. Brazilian Commercial laying hens (Gallus gallus domesticus) have been impacted significantly by mite infestations. This review aims to compile the literature on the occurrence, economic losses, biology, epidemiology and control of mite species considered important for the Brazilian laying poultry industry. The national experience was compared with practices of other countries and a scarcity of studies on this subject in Brazil was evident. The poultry industry has prioritized the use of pesticides to control infestations with little regard for the adverse effects. In this context, the integrated control programs using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Layer hen; Mite; Dermanyssus; Megninia; Ornithonyssus.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000700014

Quantile regression of nonlinear models to describe different levels of dry matter accumulation in garlic plants
Provedor de dados: 65
Autores: Puiatti,Guilherme Alves; Cecon,Paulo Roberto; Nascimento,Moysés; Nascimento,Ana Carolina Campana; Carneiro,Antônio Policarpo Souza; Silva,Fabyano Fonseca e; Puiatti,Mário; Oliveira,Ana Carolina Ribeiro de.
ABSTRACT:  Plant growth analyses are important because they generate information on the demand and necessary care for each development stage of a plant. Nonlinear regression models are appropriate for the description of curves of growth, since they include parameters with practical biological interpretation. However, these models present information in terms of the conditional mean, and they are subject to problems in the adjustment caused by possible outliers or asymmetry in the distribution of the data. Quantile regression can solve these problems, and it allows the estimation of different quantiles, generating more complete and robust results. The objective of this research was to adjust a nonlinear quantile regression model for the study of dry matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quantile regression; Nonlinear regression; Dry matter; Allium sativum L.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100203

INTRAOCULAR TRANSMISSIBLE VENEREAL TUMOR IN A DOG
Provedor de dados: 65
Autores: Rodrigues,Geórgia Nadalini; Alessi,Antonio Carlos; Laus,José Luiz.
Canine transmissible venereal tumor (TVT) is a round cell neoplasm occurring on the external genital mucosa of male and female dogs. Transmission is by cell implantation during coitus, licking, or other interaction between an affected dog and a susceptible host. Metastasis of the tumor rarely occurs. This report describes an unusual presentation of TVT with intraocular involvement and inguinal lymph nodes metastasis. The subject was a six-year-old, intact, male, Brazilian Terrier dog with a history of abnormal masses in the right eye, penis and several subcutaneous nodules in the inguinal area. Histopathological examination of the eye specimens as well as cytologic examination of penile mass and subcutaneous nodules revealed similar findings. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Transmissible venereal tumor; Eye; Neoplasms; Dog.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000100023

pH of exudate test in the physiological quality of crambe seeds
Provedor de dados: 65
Autores: Alves,Charline Zaratin; Rodrigues,Lennis Afraire; Rego,Carlos Henrique Queiroz; Silva,Josué Bispo da.
ABSTRACT: Crambe is a rapeseed with high oil content and can be used as a winter cover or as a source of raw material for the production of biodiesel, however espite the growing interest in the culture, research on the subject is still incipient, especially concerning the seed production and analysis technology. The purpose of this study is to evaluate the physiological quality of crambe seeds, 'FMS Brilhante' cultivar, by testing the pH of exudate. Five seed lots were submitted to the determination of water content and the tests of germination and vigor (first count, emergence and tetrazolium). In the conduction of pH exudate test, temperatures (25 and 30oC), and periods of seed imbibition in water (15, 30 and 45 minutes) were tested. The experiment was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crambe abyssinica Hochst; Viability; Vigor.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601014

Seed viability of Dimorphandra gardneriana subject to water stress in different temperatures
Provedor de dados: 65
Autores: Ursulino,Marina Matias; Costa,Maria do Perpétuo Socorro Damaceno; Medeiros,José George Ferreira; Alves,Edna Ursulino; Araujo,Paulo Costa; Bruno,Riselane de Lucena Alcantara; Araujo,Luciana Rodrigues de.
ABSTRACT: The forest species Dimorphandra gardneriana Tul. is widely used for various pharmacological products, yet few basic studies have been undertaken to understand their ecological and physiological attributes under stress conditions. The goal of this research was to evaluate the seed germination and vigor when subjected to different osmotic potentials and temperatures. Water restriction was simulated with polyethylene glycol 6000 solution (PEG 6000) with osmotic potentials of 0; -0,2; -0,4; -0,6; -0,8, and -1,0MPa at temperatures of 20, 25, 30, and 35°C. The effect of the treatment was determined by the germination and vigor (germination speed index, length and phytomass of dry shoot and roots) of the seeds, in an entirely random design with four...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Faveira; Water restriction; Forest species.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202090

Genetic divergence among Dimorphandra spp. accessions using RAPD markers
Provedor de dados: 65
Autores: Sudré,Cláudia Pombo; Rodrigues,Rosana; Gonçalves,Leandro Simões Azeredo; Martins,Ernane Ronie; Pereira,Messias Gonzaga; Santos,Marilene Hilma dos.
The genus Dimorphandra has distinguish relevance considering either medicinal or biodiversity aspects because it includes two species that are economically important flavonoids sources for pharmachemical industry (D. mollis Benth. and D. gardneriana Tul.), and species endemic to Brazil, such as D. jorgei Silva and D. wilsonii Rizz., threatened by extinction. In order to evaluate variability among accessions of D. mollis (fava-d'anta), D. gardneriana and D. wilsonii, it was collected fruit from individual plants from three Brazilian states in a total of 57 accessions, which were analyzed with RAPD markers. It was used 20 seeds per progeny; the DNA was extracted from fully-formed young leaves, which were collected in bulk. The data were analyzed using a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fava-d'ant; Molecular characterization; Plant genetic resource; Germoplasm.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000400010

Multiparasitism in gills of Metynnis lippincottianus from the environmental protection area of Curiaú river, Eastern Amazon
Provedor de dados: 65
Autores: Carvalho,Abthyllane Amaral de; Ferreira,Roger Leomar da Silva; Araújo,Priscila Gomes de; Negrão,Márcio Charles da Silva; Videira,Marcela Nunes.
ABSTRACT:  The high fish diversity of the Amazon has been the subject of study for several research projects because of the importance of its ecosystems. The Environmental Protection Area of the Curiaú River is composed of permanent and temporary lakes within the floodplain forests, favoring a rich diversity of fish species. Pratinha. (Metynnis lippincottianus) is an ornamental fish, widely distributed throughout Brazil and French Guiana. Fish parasites may reflect the environmental quality, as well as the habits of their host. Considering the importance of understanding and contributing to the expansion of studies on fish parasites, the present study aimed to investigate the gills of Metynnis lippincottianus from the Curiaú River basin in the municipality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ornamental fish; Parasitic fauna; Infection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600501

Ottoman forestry: socio-economic aspect and its influence today
Provedor de dados: 65
Autores: Özden,Sezgin; Birben,Üstüner.
Forestry is an important subject because it supplies wood and timber for direct human consumption, in addition to its positive effects on global warming and on bio-diversity, with a history dating back to antiquity. As a labor-intensive sector in developing countries, it maintains interactions with natural resources management, public relations and socio-economic structure. It can affect the prosperity of countries either positively or negatively. Hence, an analysis of the history of forestry bears importance because it not only sheds light on its past and present condition, but also explains the improvements for the protection of forests. Accordingly, in the first section of this study, general information on the Ottoman Land System and Ottoman Forestry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ottoman; Socio-economy; History of forestry; Law.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000300012

The paradigmatic field of usage of the theoretical category of pluriactivity in Brazil
Provedor de dados: 65
Autores: Silva,Márcia Danielly Cavalcanti; Fiúza,Ana Louise De Carvalho; Pinto,Neide Maria de Almeida.
ABSTRACT:  The lack of interpretive convergence around an analytical category or concept generates a field of disputes around the understanding of a certain phenomenon. This is also the case with “pluriactivity”, on which there remain interpretive divergences derived from its conception. This research aims to identify the interpretive tendencies that are gaining traction in Brazil. For that, the research used as a database the Brazilian Digital Library of Theses and Dissertations (BDTD - “Biblioteca Digital Brasileira de Teses e Dissertações”), since this type of database compiles and updates the state of the art on the subject. The research universe consisted of 115 dissertations and theses were systematized and analyzed using IRAMUTEQ software. Results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pluriactivity; Reproduction strategy; Survival strategy; Labor market; State of the art.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500800

Biomass and carbon stock from  Pinus  caribaea var.  hondurensis under homogenous stands in southwest Bahia, Brazil
Provedor de dados: 65
Autores: Lima,Máida Cynthia Duca de; Barreto-Garcia,Patrícia Anjos Bittencourt; Sanquetta,Carlos Roberto; Novaes,Adalberto Brito de; Melo,Lara Clímaco de.
ABSTRACT: There is a large number of studies evaluating methods to quantify biomass for the genus Pinus in different regions of Brazil. However, knowledge about this subject in the Northeast region of Brazil is still incipient. The objective of the present study was to assess the biomass and carbon stocks and select mathematical models to estimate these variables in Pinus caribaea var. hondurensis , which is established in homogenous stands in the Southwest region of the state of Bahia (Brazil). The biomass was quantified using the destructive method. Samples of needles, bole, bark, and branches were analyzed to determine their carbon contents. Ten models were tested, and the best of them were chosen based on the following statistical indicators: adjusted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exotic forest species; Mathematical models; Biomass.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600957

In vivo HAPLOID INDUCTION AND EFFICIENCY OF TWO CHROMOSOME DUPLICATION PROTOCOLS IN TROPICAL MAIZE
Provedor de dados: 64
Autores: Couto,Evellyn Giselly de Oliveira; Pinho,Édila Vilela de Resende Von; Pinho,Renzo Garcia Von; Veiga,Adriano Delly; Bustamante,Fernanda de Oliveira; Dias,Kaio Olimpio das Graças.
ABSTRACTArtificial chromosome duplication is one of the most important process in the attainment of doubled haploids in maize. This study aimed to evaluate the induction ability of the inducer line KEMS in a tropical climate and test the efficiency of the R1-Navajo marker by flow cytometry to evaluate two chromosome duplication protocols and analyze the development of the doubled haploids in the field. To accomplish this goal, four genotypes (F1 and F2 generations) were crossed with the haploid inducer line KEMS. The seeds obtained were selected using the R1-Navajo marker and subject to two chromosome duplication protocols. Duplication was confirmed using flow cytometry. The percentages of self-fertilized plants after duplication as well as the quantities...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: R-Navajo; Colchicine; Induction of maternal haploids; Zea mays.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000500435

Postharvest conservation of ‘Avalanche’ cut roses with hydroxypropyl methylcellulose-beeswax natural coating
Provedor de dados: 64
Autores: Pinsetta Junior,José Sidnaldo; Mattiuz,Claudia Fabrino Machado; Pereira,Emmanuel Moreira; Mattiuz,Ben-Hur.
ABSTRACT The use of postharvest coatings of fruits and vegetables has been the subject of many studies for their ability to extend the shelf life of vegetables. However, little is known about the effect of coatings on postharvest of cut flowers. We evaluated the effect of different concentrations of natural coating based on hydroxypropyl methylcellulose (HPMC) and beeswax (CA) on postharvest of cut roses. White rose cultivar ‘Avalanche’ obtained from commercial production at the bud stage were used. The coating was prepared by the combination of the hydrophilic phase (HPMC) and the lipid phase (CA) suspended in water, resulting in 50g lipids / 100g emulsion. The emulsion was sprayed on the flowers in different volumes: 0 (distilled water); 1.5; 3.0 and 4.5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HPMC; Rosa sp.; Vase life.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100228

Color, physicochemical parameters and antioxidant potential of whole grape juices subject to different UV-C radiation doses
Provedor de dados: 64
Autores: Henrique,Paôla de Castro; Boas,Ana Carolina Vilas; Lima,Rafaella Araújo Zambaldi; Decarlos,Antonio Neto; Lima,Luiz Carlos de Oliveira.
ABSTRACT Knowing that moderate stress such as UV radiation can activate defense mechanisms in plants, the use of UV-C radiation appears as hypothesis of a promising technique that would help to stimulate and enhance beneficial compounds for health, through a clean and healthy technology. In this study, the possible induction of secondary metabolism, the increase in the content of phytochemical compounds and physicochemical changes through the use of UV-C radiation were evaluated on whole grape juices produced with Vitis labrusca grapes, cultivar Isabel Precoce. Grapes were harvested, sanitized, exposed to UV-C radiation at doses of 0, 2, 4 and 6 KJ m-2, and then the juices were prepared and packed into amber glass bottles at room temperature. Analyses were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Vitamin C.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200226

Challengs in coffee quality: Cultural, chemical and microbiological aspects
Provedor de dados: 64
Autores: Pimenta,Carlos José; Angélico,Caroline Lima; Chalfoun,Sára Maria.
ABSTRACT The Brazilian coffee industry is undergoing a great transformation in order to serve a consumer market that is becoming increasingly demanding with regard to quality. Considering the multiple determinants of the final quality of the product, one must consider factors that are involved in steps from the pre-harvest stage to storage. The execution of the different stages according to good-practice programmes has repercussions on microbiological, physical and chemical characteristics, which in turn affect the quality of the final product with regard to sensorial properties and safety. There has been research progress in the improvement of quality evaluation techniques that minimize the subjective effects of traditional classification. It is also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Café; Classificação; Avaliação de qualidade.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000400337

Effects of different water regimes on the anatomical characteristics of roots of grasses promising for revegetation of areas surrounding hydroelectric reservoir
Provedor de dados: 64
Autores: Silva,Silvana da; Castro,Evaristo Mauro de; Soares,Ângela Maria.
The objective of this study was to evaluate the effect of different water regimes on some aspects of root anatomy of three grasses: Echinochloa pyramidalis (canarana), Setaria anceps (setária) and Paspalum paniculatum (paspalo). The plants were cultivated in a greenhouse and submitted to three water regimes: daily watering; suspension of watering and suspension of watering followed by submersion of the root system. Segments of the middle part of the roots were taken and submitted to classical techniques in botany for slide making and tissue analysis. Anatomical differences were observed among the three grasses submitted to water regimes regarding the number of cell layers in the external cortex and thickening of lignin and suberin. The submerged roots of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Revegetation; Grasses; Water deficit; Echinochloa pyramidalis; Setaria anceps; Paspalum paniculatum; Flood; Aerenchyma; Anatomical characteristics; Roots.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542003000200020

Caracterización físico-química de suelos inundados sujetos a desalinización.
Provedor de dados: 32
Autores: Guevara Olivar, Oscar Manuel.
La zona chinampera de Xochimilco presenta problemas de salinidad en el 83.25% de su superficie. Con el fin de evaluar el grado de amenaza a la que está sujeta la productividad de la zona chinampera a causa de los espesores potentes de sedimentos salinos, se evaluaron las características físico-químicas de los suelos con relación a la naturaleza del material parental y deposición, así como la evaluación de tratamientos de lavado y aplicación de yeso para desalojar la mayor concentración de sodio y lixiviarlo. Se realizó la perforación de un perfil con barrena a una profundidad de 300 cm, se tomaron muestras a cada 10 cm y analizaron los parámetros físico-químicos de acuerdo con (Richards, 1973). Asimismo, se montaron columnas de pvc rellenas con suelo de la...
Palavras-chave: Hidromorfismo; Mejorador químico; Cuenca de México; Espesores potentes; Lixiviación; Hydromorphism; Chemical enhancer; Mexico basin; Powerful thicknesses leaching; Hidrociencias; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2317

Metal hyperaccumulation in plants: Biodiversity prospecting for phytoremediation technology
Provedor de dados: 69
Autores: Vara Prasad,Majeti Narasimha; de Oliveira Freitas,Helena Maria.
The importance of biodiversity (below and above ground) is increasingly considered for the cleanup of the metal contaminated and polluted ecosystems. This subject is emerging as a cutting edge area of research gaining commercial significance in the contemporary field of environmental biotechnology. Several microbes, including mycorrhizal and non-mycorrhizal fungi, agricultural and vegetable crops, ornamentals, and wild metal hyperaccumulating plants are being tested both in lab and field conditions for decontaminating the metalliferous substrates in the environment. As on todate about 400 plants that hyperaccumulate metals are reported. The families dominating these members are Asteraceae, Brassicaceae, Caryophyllaceae, Cyperaceae, Cunouniaceae, Fabaceae,...
Tipo: Journal article
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582003000300012

Étude des secteurs du Croisic et de Pen-Bé : estimation des apports continentaux et évaluation des stocks conchylicoles
Provedor de dados: 5
Autores: Gendronneau, Maud; Haure, Joel; Jeanneret, Hélène; Le Merrer, Yoann; Lequette, Camille; Lomakine, Cédric; Martin, Jean-louis; Papin, Mathias; Ponthoreau, Catherine; Robin, Marc.
Ifremer, Nantes University and the township community "CAP Atlantique" have joined their skills to try to better understand how two key conchological areas in the shore economy of the Pays de la Loire area develop, especially since, environmentally, little is known about them, and because they face recurrent issues on the zootechnic level. This programme encompasses two main topics: assessment of environmental inputs (catchments areas input, contaminants evolution in the area, and impact on the conchological zones) and a study of the conchological culture (growth, mortality, analysis of the stocks). Concomitantly, operational tools (hydrodynamic and flux transfer models, databases, SIG) are developed to improve local management of the sites and information...
Tipo: Text
Palavras-chave: Phytosanitary; Bacteria; SIG; Conchological stocks; Modelization; Catchment areas; Continental inputs; Pen Bé; Le Croisic; Phytosanitary; Bacteria; SIG; Conchological stocks; Modelization; Catchment areas; Continental inputs; Pen Bé; Le Croisic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-1264.pdf

Ajustement de modèles mathématiques de la croissance d'algues phytoplanctoniques en culture
Provedor de dados: 5
Autores: Le Berre, Jerome.
Introduction: This document is the End of Second Year internship report for Rennes University 1's Senior Math and Computer Science Modelisation Professional diploma. This two month internship was completed at the Brest IFREMER center at the Coastal Ecology department.  IFREMER participates, in the course of its institutional missions, in observation and coastal sea surveillance, in order to improve on the knowledge, protection methods and restoration of the marine environment. Marine phytoplankton proliferation is an important study subject because of its potential cause for nuisance, for men, consumers of sea products as well as for the ecosystem.  During Spring and Summer, shellfish become invariably unsuitable for consumption due to toxins produced by...
Tipo: Text
Palavras-chave: Aquaculture; Growth; Phytoplanctonic algae; Mathematical models.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1770.pdf

Évaluation des potentialités de l'IRM pour la recherche sur la Physiologie des Bivalves Premiers résultats anatomiques et perspectives
Provedor de dados: 5
Autores: Pouvreau, Stephane; Davenel, A; Quellec, S; Rambeau, M.
Nuclear Magnetic Resonance (NMR) is increasingly used in biology and the appearance of imaging and structural and/or metabolic spectroscopy (MRI/MSR) platforms (Rennes, Strasbourg, Marseille...) devoted to this small animal shows the recent keen interest in these research techniques. However, to this day and to our knowledge, no approach of this style has been developed for sea molluscs and even less so for the cup oyster, Crassostrea gigas. Because of its economic importance, this bivalve mollusc is the subject of much research in physiology, to the point of becoming, at IFREMER, a biological model for marine invertebrates. Nonetheless, most of the methodologies developed for studying it are destructive, which (1) prevents individual follow-up, (2)...
Tipo: Text
Palavras-chave: Nuclear Magnetic Resonance; Anatomy; Biometry; Physiology; Bivalvia.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-1560.pdf

L'apport des syntheses regionales perspectives historiques et institutionnelles sur la recherche interdisciplinaire dans le domaine des peches artisanales.
Provedor de dados: 5
Autores: Weber, Jacques; Chauveau, Jean-pierre.
Each of nine people agreed to write a summary regarding changes in research on small-scale fishing in a large region of the world. These summaries that will be presented to you focus respectively on changes in research in Southeast Asia, in the South Pacific along the western coast of Latin America, in West Africa, in the Mediterranean, in Northwest Europe, and in North America. In order to help you reconstruct their actions in the halieutic context of the regions about which they are talking, Serge Garcia will first present us with a panorama of small-scale fishing. By asking them to do this study, we wished to be able to place the symposium's study within an overall framework and in an historical perspective. The objective was to relativise the...
Tipo: Text
Palavras-chave: SEM.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-2464.pdf

Extension du port du Legue (St Brieuc) étude d'impact sur l'environnement marin
Provedor de dados: 5
Autores: Merceron, Michel; Manaud, Francois; Guillaud, Jean-francois; Monbet, Yves.
The commercial port of the city of St-Brieuc currently has a limited capacity. It is only accessible for low-tonnage ships, and for this reason, cargo is not allowed, which is a contributing factor to its current traffic being limited to 450,000 tonnes per year.  A significant silting-up of the port is diminishing even more its potential for accepting ships. Its future seems, therefore, threatened. Several studies conducted by the Côtes-du-Nord Chamber of Commerce and Industry have concluded that it is necessary to develop a port with greater capacity, which would stimulate the regional economy. Cargo traffic would then reach 1 million tonnes per year, and St-Brieuc would be accessible to heavier-tonnage coasters and would then follow the current growth of...
Tipo: Text
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/rapport-2835.pdf

Report of the Working Group on Mixed Fisheries Advice for the North Sea (WGMIXFISH-NS), 26-30 May 2014, ICES HQ, Copenhagen, Denmark
Provedor de dados: 5
Autores: ICES.
The ICES Working Group on Mixed Fisheries Advice for the North Sea [WGMIXFISH-NS] (Chair: Paul Dolder (UK)) met at ICES HQ, 26—30 May 2014 to apply mixed fish-eries forecasts to the draft North Sea single species advice formed by WGNSSK 2014. The meeting has produced a North Sea Mixed Fisheries Advice sheet and included lines showing mixed fisheries scenario outcomes in the single species advice sheets (for those stocks considered) for consideration by the ACOM advice drafting group. It did not consider ToR c (application of the FCube methodology to the West of Scotland fish-eries) due to a lack of available expertise in this geographic area or ToR d (application to the Iberian waters) which is deferred to the October meeting when relevant experts will be...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00226/33759/32166.pdf

Étude des secteurs du Croisic et de Pen-Bé : estimation des apports continentaux et évaluation des stocks conchylicoles
Provedor de dados: 5
Autores: Gendronneau, Maud; Haure, Joel; Jeanneret, Hélène; Le Merrer, Yoann; Lequette, Camille; Lomakine, Cédric; Martin, Jean-louis; Papin, Mathias; Ponthoreau, Catherine; Robin, Marc.
Ifremer, Nantes University and the township community "CAP Atlantique" have joined their skills to try to better understand how two key conchological areas in the shore economy of the Pays de la Loire area develop, especially since, environmentally, little is known about them, and because they face recurrent issues on the zootechnic level. This programme encompasses two main topics: assessment of environmental inputs (catchments areas input, contaminants evolution in the area, and impact on the conchological zones) and a study of the conchological culture (growth, mortality, analysis of the stocks). Concomitantly, operational tools (hydrodynamic and flux transfer models, databases, SIG) are developed to improve local management of the sites and information...
Tipo: Text
Palavras-chave: Phytosanitary; Bacteria; SIG; Conchological stocks; Modelization; Catchment areas; Continental inputs; Pen B�; Le Croisic; Phytosanitary; Bacteria; SIG; Conchological stocks; Modelization; Catchment areas; Continental inputs; Pen B�; Le Croisic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00380/49129/49564.pdf

Etudes des activites de peche dans le golfe du Morbihan, peche professionnelle
Provedor de dados: 5
Autores: Peronnet, Isabelle; Talidec, Catherine; Daures, Fabienne.
The objective of the study is to improve knowledge of coastal fishing activity in the halieutic and economic spheres. It consists of three sections: On-board professional fishing, professional shellfish gathering, and leisure fishing, this last one being the subject of an independent report (Lesueur and Drouot). The methodology applied is based on implementation of specific surveys about the ships that frequented the Gulf of Morbihan in 2001. The emphasis was placed on identifying the occupations practiced in this zone, on describing these activities and their intensity as well as on analysing the economic performance of these fleets. The management methods, regulation of shellfish gathering on listed sites as well as their impacts on the environment are...
Tipo: Text
Palavras-chave: Urshin; Clams; Shellfish; Fleets; Metiers; Fishing activities; Bay of Morbihan; Brittany; Structure de cout; Oursin; Palourde; Bivalves; Typologie; Flottilles; Metiers; Indicateurs; Activités de peche; Golfe du Morbihan.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2265.pdf

Amenagement des peches dans les eaux communautaires: potentiel et limites des systemes de licences
Provedor de dados: 5
Autores: Meuriot, Eric; Maucorps, A.
Fishing regulations in waters under the responsibility of the EEC mainly concern three techniques of site development:  - catch quotas by species and by area (TAC, a word adapted from the English Total Allowable Catch); - the definition – of the technical characteristics of the fishing devices used (meshing, type of trawl,...); - setting a minimum commercial size for each species.  The regulations of meshing and other constraints relating to the technical characteristics of the fishing devices aim to modify the composition of the catches by age class.  The TACs are a technique for controlling the level of exploitation of the stocks. Controlling the fishing effort that they generate is carried out indirectly in the short or mid term.  For many years now,...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-2509.pdf

Review
Provedor de dados: 16
Autores: Steenis, C.G.G.J. van.
As explained in Takhtajan’s preface this book is not a mere translation of his ‘The origin of Angiospermous plants’ (1961, in Russian), but an entirely new book. I find this true and not true. Comparing it with the Origin (1958 translation of the 1954 Russian version) the essence of the new book was there given in a nutshell. In size, chapter subjects, argumentation, and bibliographic documentation, the work is very much extended and it makes very interesting reading indeed. The sequence of the chapters is logical, almost always leading to distinct synthesis. Properly it is a critical commented survey of many opinions — Takhtajan being clearly in complete command of the huge literature on the subject — but from which the author follows his own line of...
Tipo: Article / Letter to the editor
Ano: 1970
URL: http://www.repository.naturalis.nl/record/525181

It was (not) me: Causal Inference of Agency in goal-directed actions
Provedor de dados: 17
Autores: Tobias Beck; Carlo Wilke; Barbara Wirxel; Dominik Endres; Axel Lindner; Martin A. Giese.
Summary: &amp;#xd;&amp;#xa;The perception of one&amp;#x2019;s own actions depends on both sensory information and predictions derived from internal forward models [1]. The integration of these information sources depends critically on whether perceptual consequences are associated with one&amp;#x2019;s own action (sense of agency) or with changes in the external world that are not related to the action. The perceived effects of actions should thus critically depend on the consistency between the predicted and the actual sensory consequences of actions. To test this idea, we used a virtual-reality setup to manipulate the consistency between pointing movements and their visual consequences and investigated the influence of this manipulation on self-action...
Tipo: Poster
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/5858/version/2

It was (not) me: Causal Inference of Agency in goal-directed actions
Provedor de dados: 17
Autores: Tobias F. Beck; Carlo Wilke; Barbara Wirxel; Dominik Endres*; Axel Lindner; Martin A. Giese*.
Summary: &amp;#xd;&amp;#xa;The perception of one&amp;#x27;s own actions depends on both sensory information and predictions derived from internal forward models [1]. The integration of these information sources depends critically on whether perceptual consequences are associated with one&amp;#x2019;s own action (sense of agency) or with changes in the external world that are not related to the action. The perceived effects of actions should thus critically depend on the consistency between the predicted and the actual sensory consequences of actions. To test this idea, we used a virtual-reality setup to manipulate the consistency between pointing movements and their visual consequences and investigated the influence of this manipulation on self-action...
Tipo: Poster
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/5858/version/1

What can resaerch deliver for organic farming? Key note presentation
Provedor de dados: 21
Autores: Raven, Hugh.
It’s a great pleasure to have been asked to speak today, and on a subject that – while I can claim no expertise – has occupied my thoughts intermittently over the last 25 years.  I did at one stage seriously consider whether your profession was the one I wished to follow. I attended agricultural college in the late 1970s, and while my family had a farm, it seemed unlikely I would be the one asked to manage it. So I thought if I were to pursue a career in agriculture, either writing about it or researching how to improve it seemed very real career opportunities.  I took a different route, for a variety of reasons – most of them not germane to our subject today. But it is true to say that much of what I saw then had the effect of turning me away from...
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects; Knowledge management.
Ano: 2006
URL: http://orgprints.org/10151/1/Colloquium_of_organic_researchers.pdf

ASSESSING CARE: PROGRESS TOWARDS THE MEASUREMENT OF SELECTED CHILDCARE AND FEEDING PRACTICES, AND IMPLICATIONS FOR PROGRAMS
Provedor de dados: 31
Autores: Arimond,   Mary; Ruel,   Marie T.
The role of care as a critical influence on child nutrition, health, and development has received increasing attention in the last decade. While the role of care has been well elaborated at a conceptual level, we still lack simple, valid, and reliable tools to measure many aspects of care. In this review, experience with the measurement of selected childcare and feeding practices is summarized and implications for programs are discussed. Hygiene practices The use of interviews and recall methods is discouraged for the measurement of hygiene practices because research has shown that responses tend to be biased towards overreporting of “good” practices. Observational methods are therefore the method of choice, but they are subject to problems of...
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital.
Ano: 2001
URL: http://purl.umn.edu/16432

HARMONIZATION AND CONVERGENCE OF CANADIAN AND U.S. GRAIN AND OILSEEDS POLICIES: 1985-1996
Provedor de dados: 31
Autores: Gray,   Richard S.; Smith,   Vincent H.
The United States and Canada share the longest common border and largest bilateral trading relationship in the world. Recent trading agreements--CUSTA, NAFTA and WTO--have enhanced trade by encouraging elimination of many remaining trade barriers. However, one cause for concern about the effectiveness of these trade agreements has been the frequency of Canadian-U.S. trade disputes over bilateral wheat and barley trade arrangements and trade flows. To some extent, these disputes have arisen because of differences in and lack of harmonization between the domestic and trade policies implemented by the two countries, although other political factors have also clearly been important causes of these disagreements. Since 1986, many dimensions of the agricultural...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural policy; Harmonization and convergence; Grains; Oilseeds; International Relations/Trade; Q1.
Ano: 1997
URL: http://purl.umn.edu/29163

Pricing Perishables
Provedor de dados: 31
Autores: Weaver,   Robert D.; Moon,   Yongma.
A key feature of food products is their perishability. Within the short marketing window that characterizes most food and ag products, demand is typically highly stochastic and difficult to predict. This combination of features poses substantial challenges to retailers when pricing products and has implications for performance that ripples through vertical food chains. For many food products, processing to forms that can be preserved and held in inventory has traditionally been used as a means of coping with these conditions, despite its high costs and ancillary risks introduced such as change in product attributes and deterioration. This paper presents an alternative ERM strategy that focuses on dynamic pricing to control the rate of sale for perishable...
Tipo: Presentation
Palavras-chave: Dynamic pricing; Demand substitution; Consumer choice model; Robust optimization; Price assurance.; Agribusiness; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; Productivity Analysis; Research Methods/ Statistical Methods.
Ano: 2011
URL: http://purl.umn.edu/122007

Predation of Piaractus mesopotamicus and Oreochromis niloticus larvae by Pantala flavescens with different length classes - doi: 10.4025/actascibiolsci.v33i4.5470
Provedor de dados: 3
Autores: Lacerda, Carlos Henrique Figueiredo; Universidade Federal de Pernambuco; Hayashi, Carmino; Instituto de Pesca; Galdioli, Eliana Maria; Universidade de Maringá; Fernandes, Carlos Eduardo Bento; Universidade de Maringá.
The experiment had as objective to study the survival of Piaractus mesopotamicus and Oreochromis niloticus larvae subject to predation by Pantala flavescens larvae with different length classes. We used 120 larvae of P. mesopotamicus, 120 of O. niloticus, and also 24 larvae of Pantala flavescens, distributed in 24 aquariums with useful volume for 2 L, being placed one Odonate for aquarium. The treatments differed as regard to the prey species and the predator size, being kept a control treatment. An aquarium (2 L) containing one larvae of Odonate and 10 larvae of fish were considered an experimental unit. After the beginning, each three hours (18:00, 21:00, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00 and 18:00h), the remnant larvae of fish (alive) in each...
Palavras-chave: Experiment; Odonate; Fish larvae; Predator and prey experiment; Odonate; Fish larvae; Predator and prey.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5470

Capacidades para el desarrollo rural de grupos de mujeres de cuatro comunidades en la Sierra Nevada de Puebla.
Provedor de dados: 32
Autores: Ramírez Castel, Verónica.
Esta investigación tuvo como objetivo el estudio de los tipos de capacidades de las mujeres rurales participantes en la Asociación para el Desarrollo “Enlace Sierra Nevada, A. C.”, sus efectos en los ámbitos personal, familiar y comunitario y los aspectos que favorecen y limitan este desarrollo de capacidades. El método general de investigación fue el descriptivo explicativo en el que se usaron métodos particulares como las entrevistas a profundidad a las mujeres participantes en los proyectos de producción biointensiva de hortalizas, la producción y aprovechamiento de plantas medicinales y turismo rural; entrevistas a promotoras y directivos de la Asociación; así como también, observación directa. Se concluye que a partir de desarrollar de forma integral...
Palavras-chave: Capacidades; Capacitación; Desarrollo de capacidades; Género; Mujeres rurales; Capacities; Training; Capacity development; Gender; Rural women; Desarrollo Rural; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2142

Bioinformática : Aplicaciones a la proteómica y genómica
Provedor de dados: 32
Autores: Riaño Pachón, Diego Mauricio; González Estrada, Elizabeth; Alexa, Adrian; Ramírez, Fidel; Vischi Winck, Flavia; Gómez Merino, Fernando, Coord.; Silva Rojas, Hilda Victoria, Coord.; Pérez Rodríguez, Paulino, Coord.
En esta publicación intitulada “Bioinformática: aplicaciones a la genómica y proteómica” se detallan algunos de los avances más sobresalientes de los temas de genómica y proteómica, derivados de un curso internacional sobre el tema, organizado por el Colegio de Postgraduados. Estos avances incluyen aspectos de las dos ciencias ómicas, incluyendo genómica y biología estructural, código R, análisis comparativo y evolución, agrupamiento y minería de datos en R, redes de interacciones entre proteínas y proteómica bioinformática. BIOINFORMATICS : APPLICATIONS TO GENOMICS AND PROTEOMICS. ABSTRACT : In this publication entitled "Bioinformatics: applications to genomics and proteomics" are some of the most salient issues of genomics and proteomics, derived from an...
Tipo: Libro
Palavras-chave: Bioinformática; Proteómica; Genómica; ADN; Proteínas; Modelación; Simulación; Análisis de genómas; Biología estructural; Código R; Análisis comparativo; Minería de datos; Computación aplicada; Bioinformatics; Proteomics; DNA; Proteins; Models; Genomics; Simulation; R Code; Data mining; Computing; Genome analysis.
Ano: 2010
URL: http://hdl.handle.net/10521/313

Determinación del efecto de las importaciones en precios internos de granos básicos utilizando un sistema inverso de demanda
Provedor de dados: 32
Autores: Hernández Ortiz, Juan.
Con la entrada en vigor del TLCAN las importaciones de granos básicos en  México han crecido sustancialmente, a raíz de este fenómeno mucho se  ha comentado sobre la conveniencia o no  del Tratado de Libre Comercio  y sus efectos en la agricultura, derivados del crecimiento de las  importaciones de dichos productos, sin embargo, no existen estudios  donde se cuantifique la magnitud del  impacto en la agricultura nacional.  Por esta razón en este trabajo se aborda el efecto que tienen las  importaciones de granos básicos en los precios internos de México,  utilizando para ello un sistema inverso de demanda casi ideal; como  resultado se obtienen flexibilidades menores que 1 en valor absoluto lo cual  significa que los precios son inflexibles al cambio en...
Tipo: Tesis
Palavras-chave: Flexibilidades; IAIDS; Importaciones; Homogeneidad; Simetría; TLCAN; Precios internos; Doctorado; Economía; Flexibility; Homogeneity; Imports; Symmetry; NAFTA; Domestic price.
Ano: 2007
URL: http://hdl.handle.net/10521/1477

La Información como mecanismo estabilizador para los mercados de alimentos en México
Provedor de dados: 32
Autores: Siller Bedoya, Ileana Eunice.
Para los productores, comercializadores y consumidores de productos  agroalimentarios, la información es un aspecto relevante para la toma de  decisiones en cuanto a producción, distribución y consumo en los mercados de  estos productos y, por tanto, un elemento esencial en la formación de los  precios. Por ello, este trabajo tiene como objetivo medir el efecto de la  información en la formación y comportamiento de los precios al consumidor; así  como medir el comportamiento del excedente de mercado ante información  gradual, para un caso específico. La medición de la formación de precios se  realizó comparando ecuaciones precio tanto de México como de Estados  Unidos de Norteamérica (EE.UU.) de cinco productos alimentarios (carne de  cerdo, carne de...
Tipo: Tesis
Palavras-chave: Información; Mercado alimentario; Volatilidad de precios; Excedente de mercado; Doctorado; Economía; Information; Food market; Price volatility; Surplus market.
Ano: 2008
URL: http://hdl.handle.net/10521/1529

Aptitud de áreas con fines ecoturísticos en La Sierra Nevada de Texcoco, Estado de México.
Provedor de dados: 32
Autores: Pérez Vivar, Marcelino Aurelio.
El presente trabajo aborda como tema principal la determinación de la aptitud ecoturística en áreas forestales; el objetivo principal fue generar un sistema de cómputo que a partir de información cartográfica (temática) así como social (criterios, variables, valores de importancia) fuera capaz de realizar un análisis del grado de compatibilidad (aptitud) entre las condiciones presentes en un espacio y las necesarias para la práctica de una actividad ecoturística. Para alcanzar tal meta fue necesario revisar conceptos que permitieran entender el ecoturismo como fenómeno social, así como su relación con el ambiente y comprender la necesidad de una cuidadosa planificación en la implementación de un proyecto ecoturístico en un espacio específico. Estos...
Palavras-chave: Turismo; Ecoturismo; Aptitud; Software; Tourism; Ecotourism; Suitability; Forestal; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1718

The power problematic: exploring the uncertain terrains of political ecology and the resilience framework
Provedor de dados: 7
Autores: Ingalls, Micah L; Poverty-Environment Initiative, United Nations Development Programme; Human Dimensions Research Unit, Department of Natural Resources, Cornell University; mli6@cornell.edu; Stedman, Richard C; Human Dimensions Research Unit, Department of Natural Resources, Cornell University; rcs6@cornell.edu.
Significant and growing concerns relating to global social and environmental conditions and processes have raised deep questions relating to the ability of traditional governance regimes to manage for the complexities of social-ecological systems. The resilience framework provides a more dynamic approach to system analysis and management, emphasizing nonlinearity, feedbacks, and multiscalar engagement along the social-ecological nexus. In recent years, however, a number of scholars and practitioners have noted various insufficiencies in the formulation of the resilience framework, including its lack of engagement with the dimensions of power within social-ecological systems, which blunt the analytical potential of resilience and run the risk of undermining...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Political ecology; Power; Resilience; Social-ecological systems.
Ano: 2016

&amp;#8220;We Like to Listen to Stories about Fish&amp;#8221;: Integrating Indigenous Ecological and Scientific Knowledge to Inform Environmental Flow Assessments
Provedor de dados: 7
Autores: Jackson, Sue E.; Australian Rivers Institute Griffith University; TRaCK; sue.jackson@griffith.edu.au; Douglas, Michael M.; NERP Research Hub, Charles Darwin University; TRaCK; michael.douglas@cdu.edu.au; Kennard, Mark J.; Australian Rivers Institute Griffith University; TRaCK;; Pusey, Brad J.; Australian Rivers Institute Griffith University; TRaCK; Centre of Excellence in Natural Resource Management, University of Western Australia;; Huddleston, Jabal; Wagiman Traditional Owner;; Harney, Bill; Wardaman Association;; Liddy, Lenny; Wagiman Traditional Owner;; Liddy, Mona; Wagiman Traditional Owner;; Liddy, Robert; Wagiman Traditional Owner;; Sullivan, Lizzy; Wagiman Traditional Owner;; Huddleston, Brenda; Wagiman Traditional Owner;; Banderson, Melissa; Wagiman Traditional Owner;; McMah, Andrew; Wagiman Traditional Owner;; Allsop, Quentin; NT Fisheries Research, Northern Territory Department of Resources;.
Studies that apply indigenous ecological knowledge to contemporary resource management problems are increasing globally; however, few of these studies have contributed to environmental water management. We interviewed three indigenous landowning groups in a tropical Australian catchment subject to increasing water resource development pressure and trialed tools to integrate indigenous and scientific knowledge of the biology and ecology of freshwater fish to assess their water requirements. The differences, similarities, and complementarities between the knowledge of fish held by indigenous people and scientists are discussed in the context of the changing socioeconomic circumstances experienced by indigenous communities of north Australia. In addition to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Daly River; Environmental flow; Fish ecology; Indigenous ecological knowledge; Indigenous fish knowledge; Integration.
Ano: 2014

Local Perceptions of Climate Variability and Change in Tropical Forests of Papua,  Indonesia
Provedor de dados: 7
Autores: Sheil, Douglas; Center for International Forestry Research (CIFOR);Institute of Tropical Forest Conservation (ITFC);School of Environmental Science and Management Southern Cross University ; douglassheil@itfc.org; Padmanaba, Michael; Center for International Forestry Research (CIFOR); M.Padmanaba@cgiar.org; Sadjudin, Ermayanti; Conservation International; ermayanti@conservation.org.
People everywhere experience changes and events that impact their lives.  Knowing how they perceive, react, and adapt to climatic changes and events is helpful in developing strategies to support adaptation to climate change. Mamberamo in Papua, Indonesia, is a sparsely populated watershed of 7.8 million hectares possessing rich tropical forests. Our study compares scientific and traditional ecological knowledge (TEK) on climate, and analyzes how local people in Mamberamo perceive and react to climatic variations. We compared meteorological data for the region with local views gathered through focus group discussions and interviews in six villages. We explored the local significance of seasonality, climate variability, and climate change. Mamberamo is...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive strategy; Coping mechanism; Deforestation; Ecosystem services; Gender; Seasonality; Traditional ecological knowledge.
Ano: 2013

Individual- and community-level impacts of volunteer environmental monitoring: a synthesis of peer-reviewed literature
Provedor de dados: 7
Autores: Stepenuck, Kristine F; University of Wisconsin-Extension; Nelson Institute of Environmental Studies, University of Wisconsin-Madison; Wisconsin Department of Natural Resources; kris.stepenuck@uvm.edu; Green, Linda T; URI Watershed Watch; University of Rhode Island-Cooperative Extension; lgreen@uri.edu.
Citizens have long contributed to scientific research about the environment through volunteer environmental monitoring programs. Their participation has also resulted in outcomes for themselves, their communities, and the environment. This research synthesizes 35 peer-reviewed journal articles that reported such outcomes through 2012. This collection of articles was derived from a pool of 436 peer-reviewed journal articles about participatory environmental monitoring. Reported outcomes for participants and communities ranged from increasing personal knowledge and community awareness to changing attitudes and behaviors, building social capital, and ultimately, influencing change in natural resource management and policies. Mixed results were reported in...
Tipo: Peer-Reviewed Reports
Palavras-chave: Citizen science; Impacts; Natural resources; Outcomes; Public participation in scientific research; Volunteer monitoring.
Ano: 2015

Innovation and Metastability: a Systems Model
Provedor de dados: 7
Autores: Winder, Nick; Newcastle University; Nick.Winder@ncl.ac.uk.
The culture trap is the tendency to put cultural markers and habits above the demands of reason or compassion. It can reduce receptivity to new ideas and trigger Phoenix Cycles of catastrophe and renaissance. System research is then complicated by the historiographic problem of continuity and change, because there are no objective criteria for deciding whether "the system" survived or was destroyed by the catastrophe. This paper explores the differences between uncertainty emergence and self-organizing emergence using the concept of a "possibility space" to clarify the relationship between anti-causal events and causal states, i.e., the meso-history of conjuncture. Conjunctures are interpreted ex post in the context of deep time. The paper distinguishes...
Tipo: Peer-Reviewed Insight
Palavras-chave: Adaptive potential; Cultural ecodynamics; Complex adaptive systems; Innovation; Metastability; Resilience.
Ano: 2007

Hydrological and economic effects of oil palm cultivation in Indonesian peatlands
Provedor de dados: 7
Autores: Sumarga, Elham; School of Life Sciences and Technology, Institut Teknologi Bandung; elham@sith.itb.ac.id; Hein, Lars; Environmental System Analysis Group, Wageningen University; lars.hein@wur.nl; Hooijer, Aljosja; Deltares; Aljosja.Hooijer@deltares.nl; Vernimmen, Ronald; Deltares; Ronald.Vernimmen@deltares.nl.
Oil palm has increasingly been established on peatlands throughout Indonesia. One of the concerns is that the drainage required for cultivating oil palm in peatlands leads to soil subsidence, potentially increasing future flood risks. This study analyzes the hydrological and economic effects of oil palm production in a peat landscape in Central Kalimantan. We examine two land use scenarios, one involving conversion of the complete landscape including a large peat area to oil palm plantations, and another involving mixed land use including oil palm plantations, jelutung (jungle rubber; (Dyera spp.) plantations, and natural forest. The hydrological effect was analyzed through flood risk modeling using a high-resolution digital elevation model. For the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Ecosystem services; Flood risk modeling; Indonesia; Jelutung; Oil palm; Peat.
Ano: 2016

How is global climate policy interpreted on the ground? Insights from the analysis of local discourses about forest management and REDD+ in Indonesia
Provedor de dados: 7
Autores: Milne, Sarah; Crawford School of Public Policy, College of Asia and the Pacific, Australian National University; sarah.milne@anu.edu.au; Milne, Mary; Crawford School of Public Policy, College of Asia and the Pacific, Australian National University; milne_mary@hotmail.com; Nurfatriani, Fitri; Research and Development Centre of Social Economic Policy and Climate Change, Ministry of Environment and Forestry Indonesia; nurfatriani@yahoo.com; Tacconi, Luca; Crawford School of Public Policy, College of Asia and the Pacific, Australian National University; luca.tacconi@anu.edu.au.
The implementation of &amp;#8220;reducing emissions from deforestation and forest degradation&amp;#8221; (REDD+) will inevitably be affected by local social and political dynamics, with the potential for success depending significantly on cooperation from a range of stakeholders at the subnational level. Building on recent critical research on REDD+, we look at how global policy is interpreted locally by actors who are likely to be involved in REDD+ implementation. We do this by examining local stakeholder perceptions of REDD+ and forest management in two contrasting provinces of Indonesia, Riau and Papua, where deforestation rates are high and low, respectively. Using data collected from stakeholder workshops, we conduct a discourse analysis that reveals...
Tipo: Peer-Reviewed Reports
Palavras-chave: Deforestation; Discourse; Environmental politics; Indonesia; REDD+.
Ano: 2016

Adapting to Climate Change: Social-Ecological Resilience in a Canadian Western Arctic Community
Provedor de dados: 7
Autores: Berkes, Fikret; University of Manitoba; berkes@cc.umanitoba.ca; Jolly, Dyanna; University of Manitoba; dyjolly@ihug.co.nz.
Human adaptation remains an insufficiently studied part of the subject of climate change. This paper examines the questions of adaptation and change in terms of social-ecological resilience using lessons from a place-specific case study. The Inuvialuit people of the small community of Sachs Harbour in Canada's western Arctic have been tracking climate change throughout the 1990s. We analyze the adaptive capacity of this community to deal with climate change. Short-term responses to changes in land-based activities, which are identified as coping mechanisms, are one component of this adaptive capacity. The second component is related to cultural and ecological adaptations of the Inuvialuit for life in a highly variable and uncertain environment; these...
Tipo: Peer-Reviewed Reports
Palavras-chave: Social-ecological systems; Sustainability science; Arctic; Canadian North; Inuit; Inuvialuit; Adaptive strategies; Climate change; Community-based research; Coping mechanisms; Human ecology; Participatory research; Participatory research; Resilience; Social-ecological systems.
Ano: 2001

Emerging synthesis themes from the study of social-ecological systems of a tropical city
Provedor de dados: 7
Autores: Lugo, Ariel E.; USDA Forest Service International Institute of Tropical Forestry, Puerto Rico; alugo@fs.fed.us; Quintero, Braulio; State University of New York, College of Environmental Science and Forestry ; baquinte@syr.edu.
The synthesis of the contributions in this special issue about the tropical city of San Juan has resulted in five themes.  First, the city is subject to multiple vulnerabilities, but socioeconomic factors and education level affect the perception of citizens to those vulnerabilities, even in the face of imminent threat.  Second, in light of the social-ecological conditions of the city, how its citizens and institutions deal with knowledge to respond to vulnerabilities becomes critical to the adaptive capacity of the city.  Third, the relationship between socioeconomic factors and green cover, which in 2002 covered 42% of the city, is not what has been reported for other temperate zone cities. In San Juan, neighborhoods with households of high socioeconomic...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Adaptive capacity; Green and blue infrastructure; Information flows; Novel ecosystems; Social-ecological systems; Tropical cities; Vulnerability.
Ano: 2014

Extinction Risk in Successional Landscapes Subject to Catastrophic Disturbances
Provedor de dados: 7
Autores: Boughton, David; Pacific Northwest Research Station, U.S. Forest Service; david.boughton@noaa.gov; Malvadkar, Urmila; Princeton University; malvadkr@princeton.edu.
We explore the thesis that stochasticity in successional-disturbance systems can be an agent of species extinction. The analysis uses a simple model of patch dynamics for seral stages in an idealized landscape; each seral stage is assumed to support a specialist biota. The landscape as a whole is characterized by a mean patch birth rate, mean patch size, and mean lifetime for each patch type. Stochasticity takes three forms: (1) patch stochasticity is randomness in the birth times and sizes of individual patches, (2) landscape stochasticity is variation in the annual means of birth rate and size, and (3) turnover mode is whether a patch is eliminated by disturbance or by successional change. Analytical and numerical analyses of the model suggest that...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biodiversity; Catastrophe; Dispersal; Disturbance; Extinction; Landscape; Metapopulation; Patch dynamics; Patchy population; Succession.
Ano: 2002

Spatial Complexity, Resilience, and Policy Diversity: Fishing on Lake-rich Landscapes
Provedor de dados: 7
Autores: Carpenter, Stephen R; University of Wisconsin-Madison; srcarpen@wisc.edu; Brock, William A; University of Wisconsin-Madison; wbrock@ssc.wisc.edu.
The dynamics of and policies governing spatially coupled social-ecological mosaics are considered for the case of fisheries in a lake district. A microeconomic model of households addresses agent decisions at three hierarchic levels: (1) selection of the lake district from among a larger set of alternative places to live or visit, (2) selection of a base location within the lake district, and (3) selection of a portfolio of ecosystem services to use. Ecosystem services are represented by dynamics of fish production subject to multiple stable domains and trophic cascades. Policy calculations show that optimal policies will be highly heterogeneous in space and fluid in time. The diversity of possible outcomes is illustrated by simulations for a hypothetical...
Tipo: Peer-Reviewed Reports
Palavras-chave: Angler dynamics; Fish habitat; Inclusive value; Lake; Lake management; Landscape ecology; Multiple attractors; Natural resource policy; Resilience; Social-ecological system; Spatial dynamics; Sport fishery; Sport fishery; Sport fishery management.
Ano: 2004

Using historical political ecology to understand the present: water, reeds, and biodiversity in the Camargue Biosphere Reserve, southern France
Provedor de dados: 7
Autores: Mathevet, Raphael; UMR 5175 CEFE CNRS, Montpellier; raphael.mathevet@cefe.cnrs.fr; Peluso, Nancy Lee; Department of Environmental Science, Policy, and Management, University of California, Berkeley; npeluso@berkeley.edu; Couespel, Alexandre; UMR 5175 CEFE CNRS, Montpellier; alexandre.couespel@gmail.com; Robbins, Paul; Nelson Institute for Environmental Studies, University of Wisconsin-Madison; director@nelson.wisc.edu.
Exploring both ecological and political-economic histories sheds light on the long-term effects of social and environmental changes. Wetlands provide an excellent context for examining the re-working of society-nature relations in a landscape over a long duration. Wetland conditions and social-ecological dynamics show changes rapidly and visibly because they are frequently re-engineered to account for changes in both technology and social preferences. Wetlands are subject to multiple, concurrent property and access regimes that have consequences for both management and ecosystem health. We discuss the social-natural history of the Scamandre Marshes in the western part of the Camargue Biosphere Reserve using a historical political ecology approach to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive cycle; Biodiversity conservation; Camargue; Historical political ecology; Wetland management.
Ano: 2015

STATITIONARY ENGINE PERFORMANCE USING MIXTURE OF SOYBEAN AND CASTOR BEAN BIODIESEL TO DIESEL OIL
Provedor de dados: 70
Autores: Cortez,Jorge W.; Guimarães,Camila C.; dos Santos,Vivianni M. L.
ABSTRACT The use of alternative fuels in diesel engines has been the subject of research that seeks new fuels to expand the energy matrix. The aim of this study was to evaluate the performance of the stationary engine with the use of mixtures of biodiesel from soybean and castor bean added to diesel (S500) in two proportions (25% and 40%), evaluating the torque, effective power observed and specific consumption. The five biodiesel mixtures of soybean (S) and castor bean (C) analyzed were: S100C0, S75C25, S50C50, S25C75 and S0C100, which were added to the diesel in proportions B25 and B40, totaling ten treatments, plus the control with diesel S500 (B7). The stationary engine was subjected to the rotations of 3000, 2700, 2400, 2100, 1800 and 1500 rpm. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agroenergy; Diesel engine; Biodiesel/diesel mixtures; Oleaginous; Engine rotation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600918

Leaf seasonal accumulation of a 47-kDa dehydrin and changes in its cryoprotective activity in Nothofagus dombeyi (Mirb.) Blume
Provedor de dados: 73
Autores: Gallardo-Cerda,Jorge; Bravo,León A; Corcuera,Luis J.
Nothofagus dombeyi (Mirb.) Blume is an evergreen tree, pioneer in habitats subject to unfavorable environmental conditions as nighttime freezing temperatures and low water content. It inhabits zones characterized by cold Winter with freezing temperature and Spring frosts reaching to -5°C. Furthermore, it has the capacity to maintain a functional photosynthetic apparatus at low temperatures. We postulated that N. dombeyi is capable to accumulate dehydrins in leaves in response to cold. Seasonal variation in dehydrins, soluble total proteins, and cryoprotective activity in vitro of protein extracts of N. dombeyi leaves were analyzed during the years 2004 and 2005. A dehydrin-like protein of 47-kDa was immunologically identified; this protein was present only...
Tipo: Journal article
Palavras-chave: Evergreen; Tree; Old acclimation; Proteins.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000100002

Rootstock performance for cherry tomato production under organic, greenhouse production system
Provedor de dados: 75
Autores: Albino,Vanessa S; Peixoto,José R; Caetano Junior,Valter; Vilela,Michelle S.
ABSTRACT Studies have indicated that grafting increases yield and prevents plant diseases. An experiment was installed to evaluate the influence of rootstock on the physicochemical and phytotechnical characteristics of a cherry tomato cultivar (Sweet Grape) under organic, greenhouse production system, from July to December 2014. The experiment consisted of a randomized complete block design, with eight replications. Treatments were composed of four rootstocks (Emperador, Muralha, Enforce, and Enpower) and the ungrafted cultivar Sweet Grape (control). The following variables were analyzed: plant height, yield, firmness, discard, yield/discard ratio, total titratable acidity (TTA), total soluble solids (TSS), ratio, pH, number of clusters, and number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Sweet Grape; Grafting; Emperador; Cerrado.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100130

Comparing procedures for performing tetrazolium test on carrot seeds
Provedor de dados: 75
Autores: Lima,Cristina B; Boaventura,Ana C; Villela,Tamiris T.
ABSTRACT The tetrazolium (TZ) test is one of the main methods to estimate vitality or viability and seed vigor. The aim of this study was to improve the methodology and reduce the execution time of tetrazolium test on carrot seeds, considering two existing references on this subject. Eight lots of ‘Brasilia’ carrot seeds were used. The hydration, during the pre-conditioning of the seeds, was done in two ways: directly in water during 18 hours and in rolls of filter paper during 2 hours. Seed color was analyzed through combinations between cutting types, concentration, period and temperature used during contact with the TZ solution. Three types of longitudinal cutting were used, before immersion in the tetrazolium solution: a) lateral and as distant as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Daucus carota; Vegetables; Seed viability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200240

Genetic resources of vegetable crops: a survey in the Brazilian germplasm collections pictured through papers published in the journals of the Brazilian Society for Horticultural Science
Provedor de dados: 75
Autores: Sudré,Cláudia P; Leonardecz,Eduardo; Rodrigues,Rosana; Amaral Júnior,Antônio T do; Moura,Maria da CL; Gonçalves,Leandro SA.
The research on plant genetic resources is essential for the conservation of genetic diversity and accessions' divergence studies, as a basis for plant breeding. Aiming to know the state of art in this subject, a historical survey was carried out in Revista de Olericultura and in Horticultura Brasileira, from 1961 to 2006, searching for papers dealing with vegetable crops genetic resources. In each of the papers, the species studied, first author institution, publication year, applied software, number of accessions and descriptors, and the multivariate techniques used were registered. Based on these characteristics, papers were grouped using multivariate analysis. Sixty-one papers dealt somehow with genetic resources in the time covered by the survey, from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Review; Multivariate analysis; Diagnosis; Genetic diversity; Vegetables.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362007000400002

Особенности заражённости черноморского мерланга миксоспоридиями в зависимости от его размерно-возрастных и половых признаков
Provedor de dados: 13
Autores: Юрахно, В. М.
В 1987 – 1989 и 1998 – 2002 гг. впервые исследована заражённость черноморского мерланга Merlangius merlangus euxinus  (Nordmann) двумя массовыми видами миксоспоридий  (Myxozoa: Myxosporea) – Myxidium gadi Georgevitsch, 1916 и Ceratomyxa merlangi Zaika, 1966 – в зависимости от биотических (длина, вес и пол рыб) факторов среды.
Tipo: Journal Contribution
Palavras-chave: Myxosporeans; Whiting; Host biology; Black Sea.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/635

Analysis of phenotypes altered by temperature stress and hipermutability in Drosophila willistoni
Provedor de dados: 76
Autores: D'Ávila,Marícia F.; Garcia,Rosane N.; Loreto,Elgion L. S.; Valente,Vera Lúcia da S.
Drosophila willistoni (Sturtevant, 1916) is a species of the willistoni group of Drosophila having wide distribution from the South of USA (Florida) and Mexico to the North of Argentina. It has been subject of many evolutionary studies within the group, due to its considerable ability to successfully occupy a wide range of environments and also because of its great genetic variability expressed by different markers. The D. willistoni 17A2 strain was collected in 1991 in the state of Rio Grande do Sul, Brazil (30°05'S, 51°39'W), and has been maintained since then at the Drosophila laboratory of UFRGS. Different to the other D. willistoni strains maintained in the laboratory, the 17A2 strain spontaneously produced mutant males white-like (white eyes) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: D. willistoni; 17A2 strain; Temperature stress; Genetic variability; Hypermutability.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000300009

Population ecology of the multivoltine Neotropical gall midge Eugeniamyia dispar (Diptera, Cecidomyiidae)
Provedor de dados: 76
Autores: Mendonça, Jr.,Milton de S.; Romanowski,Helena P.
Our understanding of the population ecology of insect gallers is largely built on examples from temperate zones, but tropical and subtropical gallers may present distinct patterns of abundance and distribution across time. Eugeniamyia dispar Maia, Mendonça &amp;amp; Romanowski, 1996 is a multivoltine Neotropical cecidomyiid that induces spongy leaf galls on Eugenia uniflora (Myrtaceae). Galls were censused in the urban area of Porto Alegre, southern Brazil on six plants at two sites, for two years, at roughly weekly intervals. Overall 9,694 eggs, galling attempts and galls were counted. New galls continuously appear on developing leaves, but galls with live inducers are absent from June to at least early August. Galls on a same shoot develop...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Eugenia uniflora; Gall-inducer; Myrtaceae; Population dynamics.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000200009

Life history, biomass and production of Coronatella rectangula (Branchiopoda, Anomopoda, Chydoridae) from Minas Gerais
Provedor de dados: 76
Autores: Viti,Thais; Wisniewski,Célio; Orlando,Tereza Cristina; Santos-Wisniewski,Maria José dos.
Species of Chydoridae provide the main diversity of the Cladocera. These organisms have been the subject of many studies; some dealing with their role in energy flow in aquatic ecosystems, since they inhabit the littoral region of water bodies which undergo the first impacts from anthropic activities. The aim of this study is to increase knowledge about the life cycle of Coronatella rectangula (Sars, 1861), a species found in several water bodies in the state of Minas Gerais, Brazil. The life cycle was determined by the culture of parthenogenetic females under controlled conditions in the laboratory. Experimental cultures were maintained in growth chambers at a constant temperature of 23.6(±0.5)ºC, through a 12 h light/12 h dark photoperiod. The organisms...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Life cycle; Cladocera; Littoral region; Phytophilous organisms.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000200005

Bird-habitat associations in coastal rangelands of southern Brazil
Provedor de dados: 76
Autores: Dias,Rafael A.; Bastazini,Vinicius A. G.; Gianuca,Andros T.
Nearly all remnants of temperate grasslands in southeastern South America are used for livestock ranching and are subject to habitat degradation resulting from this activity. Exploring how habitat features affect the composition of grassland avifaunal communities is a first step to understand how current cattle-ranching management practices impact avian diversity. We used canonical ordination to test for relationships between five habitat variables and the composition of the bird community in coastal grasslands in southern Brazil. We sampled pastures with different heights, from overgrazed short-grass to tall herbaceous vegetation. We recorded 1,535 individuals and 27 species of birds. The first ordination axis indicated a strong contribution of mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Habitat use; Livestock ranching; Grassland management; Canonical ordination; "Campos" grasslands.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200010

Avaliação de impactos socioambientais de tecnologias na Embrapa.
Provedor de dados: 14
Autores: RODRIGUES, G. S.
Resumo: Entre os processos do Sistema Embrapa de Gestão, explicitados anualmente no Balanço Social institucional, uma plataforma metodológica de referência é indicada para que as Unidades de Pesquisa analisem o desempenho e relatem os impactos econômicos, ambientais e sociais de inovações tecnológicas selecionadas, com base em levantamentos de dados em campo junto aos produtores rurais adotantes e outros usuários dessas tecnologias. Compõe- se, assim, uma relevante base de dados para análise crítica dos resultados da pesquisa, para a gestão dos processos de transferência e para a definição de demandas complementares de desenvolvimento tecnológico. O presente texto revisa o papel dessa plataforma de avaliação de impactos, o aprendizado institucional sobre o...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Avaliação de impacto; Embrapa; New technology; Tecnologia agrícola; Impacto ambiental; Impacto social; Pesquisa agrícola; Environmental assessment; Social impact; Environmental impact.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1020852

Oil palm fatal yellowing (FY), a disease with an elusive causal agent.
Provedor de dados: 14
Autores: BITTENCOURT, C. B.; LINS, P. de C.; BOARI, A. de J.; QUIRINO, B. F.; TEIXEIRA, W. G.; SOUZA JUNIOR, M. T.
Abstract: Fatal yellowing disease (FY) is a bud rot-type disease that severely affects oil palm plantations in Latin America. Since 1974, when it was first reported in Brazil, this disorder has been responsible for severe economic losses in the oil palm industry; and, for nearly 50 years, several studies have tried to identify its causal agent, without success. The etiological studies regarding FY in oil palm explored either biotic and abiotic stress scenarios, in a single or combined manner. Most recently, the hypothesis in favor of one biotic cause has lost some grounds to the abiotic one, mainly due to new insights regarding deficient aeration in the soil, which reduces the potential for oxy-reduction, causing changes in the ionic composition of the...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Amarelecimento letal; Fatal yellowing; Dendê; Epidemiology; Palm oils; Abiotic stress; Biotic stress; Etiology; Elaeis; Tropical agriculture.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135533

Levantamento bibliométrico de tecnologias de captura de gás carbônico de fontes energéticas.
Provedor de dados: 14
Autores: VAZ JUNIOR, S.; SOUZA, A. P. R. de; BAETA, B. E. L.
Resumo: O gás carbônico (CO2), ou dióxido de carbono, é um gás gerado tanto por fontes naturais quanto por fontes antrópicas, como a agricultura e a queima de combustíveis fósseis para a geração de energia. Na atualidade, ele é visto como o principal contribuinte para o aumento do efeito estufa, levando ao aquecimento global. Portanto, o desenvolvimento de tecnologiasde captura e uso desse gás são de grande importância para a mitigação dos gases do efeito estufa (GEE) e redução de seus efeitos ambientais negativos. Neste Boletim são apresentados e discutidos os resultados obtidos do levantamento bibliométrico para posicionamento do Brasil frente às tecnologias de captura de dióxido de carbono de fontes energéticas. Tal levantamento foi precedido de uma...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Aquecimento global; Gases do efeito estufa; Precificação de carbono; Captura química; Bioenergia; Dióxido de Carbono; Efeito Estufa; Global warming; Greenhouse gases; Greenhouse effect; Carbon dioxide; Global carbon budget.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132558

Effects of liming, green manuring, and phosphate addition on electrochemical attributes of an oxisol from Central Brazil.
Provedor de dados: 14
Autores: DYNIA, J. F.; CAMARGO, O. A.
Highly weathered tropical soils are characterized by having a predominantly variable charge. Many management practices commonly used in the exploitation of these soils (e.g.,liming, phosphate application, and manuring) are known to modify their electrical charge and the sorption/desorption behavior of cations and anions. This process is, at least, partially governed by the charges existing in the soil system. Available information on this subject comes mainly from short-term laboratory and greenhouse experiments. There is a lack of data regarding the cumulative and long-term effects of those practices used at farm-scale levels and on the dynamics and availability of nutrients to the plants under field conditions. In the present work, changes in some...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Green manuring; Fosfato; Liming.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/13072

Synthesis of new scientific challenges for GODAE OceanView
Provedor de dados: 5
Autores: Schiller, Andreas; Bell, Mike; Brassington, Gary; Brasseur, Pierre; Barciela, Rosa; De Mey, Pierre; Dombrowsky, Eric; Gehlen, Marion; Hernandez, Fabrice; Kourafalou, Villy; Larnicol, Gilles; Le Traon, Pierre-yves; Martin, Matthew; Oke, Peter; Smith, Gregory C.; Smith, Neville; Tolman, Hendrik; Wilmer-becker, Kirsten.
The marine environment plays an increasingly important role in shaping economies and infrastructures, and touches upon many aspects of our lives, including food supplies, energy resources, national security and recreational activities. Global Ocean Data Assimilation Experiment (GODAE) and GODAE OceanView have provided platforms for international collaboration that significantly contribute to the scientific development and increasing uptake of ocean forecasting products by end users who address societal issues such as those listed above. Many scientific challenges and opportunities remain to be tackled in the ever-changing field of operational oceanography, from the observing system to modelling, data assimilation and product dissemination. This paper...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00284/39522/38015.pdf

Effects of biological, economic and management factors on tuna and billfish stock status
Provedor de dados: 5
Autores: Pons, Maite; Branch, Trevor A.; Melnychuk, Michael C.; Jensen, Olaf P.; Brodziak, Jon; Fromentin, Jean-marc; Harley, Shelton J.; Haynie, Alan C.; Kell, Laurie T.; Maunder, Mark N.; Parma, Ana M.; Restrepo, Victor R.; Sharma, Rishi; Ahrens, Robert; Hilborn, Ray.
Commercial tunas and billfishes (swordfish, marlins and sailfish) provide considerable catches and income in both developed and developing countries. These stocks vary in status from lightly exploited to rebuilding to severely depleted. Previous studies suggested that this variability could result from differences in life-history characteristics and economic incentives, but differences in exploitation histories and management measures also have a strong effect on current stock status. Although the status (biomass and fishing mortality rate) of major tuna and billfish stocks is well documented, the effect of these diverse factors on current stock status and the effect of management measures in rebuilding stocks have not been analysed at the global level....
Tipo: Text
Palavras-chave: Fisheries management; Marine conservation; Stock assessment; Stock status; Tuna fisheries.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00333/44383/44107.pdf

How Do Fishing and Environmental Effects Propagate Among and Within Functional Groups?
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Collie, Jeremy S.; Trenkel, Verena.
Competition and predation can play different roles in mediating the influence of external pressures, such as fishing or environmental variations, on marine communities. Pressure effects propagate through food webs along predation links. These predator-prey interactions may result in trophic cascades, but they can be buffered by competitive interactions. We investigated these mechanisms by taking a functional-group approach. Are functional groups affected by external pressures in a predictable way? Within functional groups, do all species respond in the same way, or does competitive release allow for compensation among species? We constructed a simple community model, with functional groups connected by predation links. Loop analysis was used to make...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00154/26492/25465.pdf

Etude comparative par electrophorese de Scomber Scombrus et Scomber Colias
Provedor de dados: 5
Autores: Bonnet, Marc; Pichot, Paul.
Previous research on the mackerel's blood tissue dealt with, on the one hand, blood groups, and on the other hand, the immunology of serum proteins (BONNET, 1967). Their goal was to bring to light the possible existence of distinct races within the species Scomber scombrus. The study by electrophoresis of serum and crystalline lens proteins was undertaken with this same goal in mind. Its aim was, first of all, to determine biochemical characteristics that have a definite taxonomic value, which led us to compare the protein diagrams of Scomber scombrus and Scomber colias. The results obtained are the subject of this report, in which there are also data on the equipment and techniques used. Later research will consist in seeing whether some of these...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3149.pdf

Assessment of the impact of a wastewater treatment process including Advanced Oxidation Technique on environment using chemical and biological indicators
Provedor de dados: 5
Autores: Caill-milly, Nathalie; De Casamajor, Marie-noelle; Pigot, Thierry; Paulin, Thomas; Bru, Noëlle; Sanchez, Florence; Marticorena, Julien; Lanceleur, Laurent; Gonzalez, Patrice; Daffe, Guillemine.
In a context of several directives for transitional and coastal waters masses (Water Framework Directive, Marine Strategy Framework Directive and Bathing Water Directive), the good ecological status of water but also conservation of marine ecosystem should be quickly achieved. The Basque coastline (SE of the Bay of Biscay) is subject to strong human pressures with a high density of population over the year, and especially during the summer with tourist activities. It generates nutrient discharge, water and sediment pollution and impacts the quality of the marine environment. Such pressure and the way to reduce its impacts are the main concerns of authorities Locally, in order to improve wastewater treatment process, an alternative technical solution is...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00279/39051/37614.pdf

Occurrence of venlafaxine residues and its metabolites in marine mussels at trace levels: development of analytical method and a monitoring program
Provedor de dados: 5
Autores: Bueno, M. J. Martinez; Boillot, C.; Munaron, Dominique; Fenet, H.; Casellas, C.; Gomez, E.
Coastal areas are subject to growing pressures and impacts due to increasing of the human activities. Lipophilic organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs) or polychlorinated biphenyls (PCBs), have been monitored for decades within biomonitoring programs. However, until now, little information on the detection of called “emerging contaminants” as hydrophilic organic compounds, in the marine environment and no data on its metabolites or transformation products in marine organisms is available. In this way, a sensitive analytical methodology for identification and confirmation of venlafaxine residues (VEN) and five of its main metabolites in the marine mussels Mytilus galloprovincialis was validated. The sample preparation...
Tipo: Text
Palavras-chave: Antidepressant; Emerging contaminants; Transformation products; Marine organisms; Orbitrap; QuEChERS.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00168/27877/26123.pdf

Pollutant effects on Pacific oyster, Crassostrea gigas (Thunberg), hemocytes: Screening of 23 molecules using flow cytometry
Provedor de dados: 5
Autores: Gagnaire, Beatrice; Thomas Guyon, H; Burgeot, Thierry; Renault, Tristan.
The shellfish industry is an important economic activity in France, occurring mostly in estuarine zones subject to pollution due to anthropogenic activities. The harmful effects of pollutants on species inhabiting these estuarine zones are not well known. Among marine species, bivalve mollusks---particularly Pacific oyster, Crassostrea gigas-may serve a model of interest. The species is sedentary and filter-feeding, which favors bioaccumulation of pollutants in their tissues. Oysters may be suitable for studies on disturbance by pollutants of physiological activities, among which defense mechanisms are poorly documented in bivalves. In this study, effects of pollutants on hemocyte functions were monitored in Pacific oyster, C. gigas. Hemocytes were exposed...
Tipo: Text
Palavras-chave: Toxicity; Pesticides; PCBs; PAHs; Crassostrea gigas; Pacific oyster; Hemocytes; Flow cytometry; Cellular activities.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1695.pdf

Similar patterns of patterns of community organization characterize distinct groups of different trophic levels in the plankton of the NW Mediterranean Sea
Provedor de dados: 5
Autores: Raybaud, V.; Tunin-ley, A.; Ritchie, M. E.; Dolan, J. R.
Planktonic populations were sampled over a 4 week period in the NW Mediterranean, at a site subject to little vertical advection during the Dynaproc 2 cruise in 2004. The characteristics of the phytoplankton, the tintinnid community and the zooplankton have recently been described in detail. Based on these studies, we compared the characteristics of 3 well-circumscribed assemblages of different trophic levels: Ceratium of the phytoplankton, herbivorous tintinnids of the microzooplankton, and large (&gt; 500 mu m) omnivorous and carnivorous copepods of the metazoan zooplankton. In all three groups, diversity as H' or species richness, was less variable than concentration of organisms. Plotting time against species accumulation, the curves approached plateau...
Tipo: Text
Palavras-chave: Species abundance distributions; Diversity; Zooplankton; Microzooplankton; Phytoplankton; Biodiversity.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00208/31970/30411.pdf

Modeling the Nd isotopic composition in the North Atlantic basin using an eddy-permitting model
Provedor de dados: 5
Autores: Arsouze, Thomas; Treguier, Anne-marie; Peronne, Simon; Dutay, J. -c.; Lacan, F.; Jeandel, C.
Boundary Exchange (BE - exchange of elements between continental margins and the open ocean) has been emphasized as a key process in the oceanic cycle of neodymium (Nd) (Lacan and Jeandel, 2005a). Here, we use a regional eddy-permitting resolution Ocean General Circulation Model (1/4A degrees) of the North Atlantic basin to simulate the distribution of the Nd isotopic composition, considering BE as the only source. Results show good agreement with the data, confirming previous results obtained using the same parameterization of the source in a coarse resolution global model (Arsouze et al., 2007), and therefore the major control played by the BE processes in the Nd cycle on the regional scale. We quantified the exchange rate of the BE, and found that the...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12412/9201.pdf

Age, condition and dominance-related sexual ornament size before and during the breeding season in the black grouse     Lyrurus tetrix
Provedor de dados: 5
Autores: Harris, Sarah; Kervinen, Matti; Lebigre, Christophe; Pike, Thomas W.; Soulsbury, Carl D.
Male ornaments function as honest cues of male quality in many species and are subject to intra‐ and intersexual selection. These ornaments are generally studied during peak expression, however their size outside the breeding season may determine ultimate ornament size and costliness, and as such reproductive success. We investigated whether male black grouse Lyrurus tetrix eye comb size was related to age, condition and measures of male dominance before and during the breeding season. Total combined eye comb size began to increase ~70 days before the start of the breeding season. Adult males (aged ≥ 2 years old) had consistently larger eye combs than younger males (1 year old) both before and during the breeding season. Heavier and more dominant adult...
Tipo: Text
Palavras-chave: Age; Ornament expression; Dominance.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55121/56577.pdf

Succession of primary producers and micrograzers in a coastal ecosystem dominated by Phaeocystis globosa blooms
Provedor de dados: 5
Autores: Grattepanche, Jean-david; Breton, Elsa; Brylinski, Jean-michel; Lecuyer, Eric; Christaki, Urania.
The community structures and succession of phytoplankton, protozooplankton and copepods were studied from February 2007 to July 2009 in a coastal area of the eastern English Channel subject to Phaeocystis globosa blooms. While diatom blooms preceded P. globosa blooms each year, the community structure and stock of heterotrophic protists appeared to be related to the dominant P. globosa life cycle stages. In 2007, the dominance of large colonies (&gt; 100 mu m, up to 316 mu g C L(-1)), which resulted in a high biomass of healthy free cells (up to 132 mu g C L(-1)), accompanied high spirotrich ciliate stocks (up to 58 mu g C L(-1)) and high abundances of the copepods Acartia clausi and Temora longicornis (up to 11 ind. L(-1)). In 2008, the bloom which lasted...
Tipo: Text
Palavras-chave: Phaeocystis globosa; Diatoms; Micrograzer community; Eastern English Channel.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00373/48468/48714.pdf

Export fluxes in a naturally iron-fertilized area of the Southern Ocean - Part 1: Seasonal dynamics of particulate organic carbon export from a moored sediment trap
Provedor de dados: 5
Autores: Rembauville, M.; Salter, I.; Leblond, N.; Gueneugues, A.; Blain, S.
A sediment trap moored in the naturally iron-fertilized Kerguelen Plateau in the Southern Ocean provided an annual record of particulate organic carbon and nitrogen fluxes at 289 m. At the trap deployment depth, current speeds were typically low (similar to 10 cm s(-1)) and primarily tidal-driven (M2 tidal component). Although advection was weak, the sediment trap may have been subject to hydrodynamical and biological (swimmer feeding on trap funnel) biases. Particulate organic carbon (POC) flux was generally low (&lt; 0.5 mmol m(-2) d(-1)), although two episodic export events (&lt; 14 days) of 1.5 mmol m(-2) d(-1) were recorded. These increases in flux occurred with a 1-month time lag from peaks in surface chlorophyll and together accounted for...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00295/40578/39496.pdf

A Microarray-Based Analysis of Gametogenesis in Two Portuguese Populations of the European Clam Ruditapes decussatus
Provedor de dados: 5
Autores: Sousa, Joana; Milan, Massimo; Bargelloni, Luca; Pauletto, Marianna; Matias, Domitilia; Joaquim, Sandra; Matias, Ana Margarete; Quillien, Virgile; Leitao, Alexandra; Huvet, Arnaud.
The European clam, Ruditapes decussatus is a species with a high commercial importance in Portugal and other Southern European countries. Its production is almost exclusively based on natural recruitment, which is subject to high annual fluctuations. Increased knowledge of the natural reproductive cycle of R. decussatus and its molecular mechanisms would be particularly important in providing new highly valuable genomic information for better understanding the regulation of reproduction in this economically important aquaculture species. In this study, the transcriptomic bases of R. decussatus reproduction have been analysed using a custom oligonucleotide microarray representing 51,678 assembled contigs. Microarray analyses were performed in four gonadal...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29935/28623.pdf

L'économie du développement et de l'entreprise aquacoles
Provedor de dados: 5
Setting oneself up in aquafarming is, before all else, about having a production plan that offers guarantees of profitability, and demonstrating this profitability in practise. As with any production business, its management is a series of decisions on the part of the company's leaders. These choices must take into account the company's revenue and changes in the environment. By environment we mean both new biological and technological discoveries as well as changes in the supply and production markets themselves. It is also the economic, social and institutional environment. As indicated at the beginning of this special issue, here we are interested more specifically in the economy of new aquafarming production. But these economics reminders can be...
Tipo: Text
Palavras-chave: SEM.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-2518.pdf

New starting point for the Indian Ocean: Second phase of breakup for Gondwana
Provedor de dados: 5
Autores: Thompson, Joseph Offei; Moulin, Maryline; Aslanian, Daniel; De Clarens, P.; Guillocheau, F.
The amalgamation of Gondwana and its subsequent fragmentation has been a subject of several studies over the past five decades, yet the very important question of the initial geometry of the supercontinent remains enigmatic. Current reconstruction models of the Indian Ocean are characterized by large gaps, overlaps and misfits of major structural and Cratonic bodies in their fit, and positions of tectonic blocks that are inconsistent with field observations, a phenomenon sustained by inadequate data, long standing debates and a lack of consensus on the nature of major structures and basins in the ocean. Past attempts to reconstruct the initial fit of the ocean has led to varied and complex models, with their own logic and different geographical limits,...
Tipo: Text
Palavras-chave: Gondwana; Plate tectonics; Indian Ocean; PanAfrican structures; Amalgamation; Kinematic evolution.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59298/61992.pdf

Distributions of the carbonate system properties, anthropogenic CO2, and acidification during the 2008 BOUM cruise (Mediterranean Sea)
Provedor de dados: 5
Autores: Touratier, Franck; Guglielmi, V.; Goyet, Catherine; Prieur, L.; Pujo-pay, M.; Conan, P.; Falco, C.
We relate here the distributions of two carbonate system key properties (total alkalinity, AT; and total dissolved inorganic carbon, CT) measured along a section in the Mediterranean Sea, going from Marseille (France) to the south of the Cyprus Island, during the 2008 BOUM cruise. The three main objectives of the present study are (1) to draw and comment on the distributions of AT and CT in the light of others properties like salinity, temperature, and dissolved oxygen, (2) to estimate the distribution of the anthropogenic CO2 (CANT) in the intermediate and the deep waters, and (3) to calculate the resulting variation of pH (acidification) since the beginning of the industrial era. Since the calculation of CANT is always an intense subject of debate, we...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00133/24383/22397.pdf

PREVIMER: A coastal operational oceanography system coupled to the Copernicus Marine Service
Provedor de dados: 5
Autores: Lecornu, Fabrice; Pineau-guillou, Lucia; Dumas, Franck; Le Traon, Pierre-yves; Gohin, Francis; Menesguen, Alain.
Our coastal zones are subject to increasing anthropogenic pressure. Monitoring systems are required to protect them, prevent or mitigate risks and to ensure a sustainable management of their resources.  PREVIMER is a partnership between Ifremer (French Research Institute for Exploitation of the Sea), SHOM (French Hydrographic Office) and several major French institutions (www.previmer.org). It provides coastal observations, analyses and 4 days forecasts for the French coasts of the English Channel, Atlantic Ocean and Mediterranean Sea: currents, water levels, waves, temperature, salinity, turbidity, nutrients and plankton concentrations. The service includes information based on in situ, satellite observations and numerical simulations.  PREVIMER products...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00189/30039/28525.pdf

Interface air-mer : aspects écologiques du microneuston dans le film de surface
Provedor de dados: 5
Autores: De Souza Lima, Yolanda.
The sea surface microlayer (upper 100 pm) was sampled using Harvey's rotating drum collector. Greater amounts of nutrients, particulate organic carbon and living material occurred in the surface film than in samples taken at 0,50m. Neuston displayed a greater level of absolute production, but assimilation numbers were usually lower in the films than at a depth of 0,50m. Algal phytoplankton also occurred in much higher densities in sea-surface films than in subsurface waters. Individual species abundances differed between phytoneuston and underlying phytoplankton. Though surface microlayers with a richer nutrient environment may represent a favorable biotope to microplankton growth, neustonic organisms may be subject to considerable stress due to higher...
Tipo: Text
Palavras-chave: Microneuston; Slicks; Composition spécifique; Productivité; Golfe de Marseille.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00306/41756/40967.pdf

Biofilms en mileu marin
Provedor de dados: 5
Autores: Compere, Chantal.
Introduction: Almost all submerged surfaces in the marine environment are subject to developing an organic film, with the exception of some living organisms, such as sponges, which do not undergo any great colonization, for no currently-known scientific reason. The presence of this biofilm is at the source of many problems in the oceanographic field and for marine business. This article introduces some drawbacks relating to the existence of this fouling and elaborates upon the main studies conducted at IFREMER concerning the most-used methods for combating it. However, the anti-fouling agents that are generally used for protecting facilities are toxic and can have disastrous consequences on the marine environment's fauna and flora. Moreover, the use of...
Tipo: Text
Palavras-chave: Biofilm; Seawater.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-1698.pdf

Dynamics of spatial patterns of microphytobenthic biomass: inferences from a geostatistical analyisis of two comprenhensive surveys in Marennes-Oléron Bay (France)
Provedor de dados: 5
Autores: Guarini, Jean-marc; Blanchard, Gerard; Bacher, Cedric; Gros, Philippe; Riera, Pascal; Richard, Pierre; Gouleau, Dominique; Galois, Robert; Prou, Jean; Sauriau, Pierre-guy.
Microphytobenthos plays an important role as primary producer in shallow embayments subject to a tidal regime. The present paper aims to characterize the spatial patterns of sedimentary chlorophyll a (chl a) biomass in 2 seasons in the wide intertidal mudflats of the Marennes-Oleron Bay (France); furthermore, it provides estimates of total microphytobenthic biomass. Accordingly, a systematic sampling scheme was performed in June 1995 and in January 1996. On average, biomass was higher in June (ca 120 mg chl a m-2) than in January (ca 85 mg chl a m-2). Moreover, the geostatistical analysis revealed that spatial similarities were propagated over larger distances in June (6 km) than in January (2.2 km). In order to account for this result , we suggest that...
Tipo: Text
Palavras-chave: Marennes Oleron; Intertidal mudflat; Geostatistics; Spatial distribution; Chrlorophyll a; Microphytobenthos.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-3820.pdf

Managing the Agri-Food System of Watersheds to Combat Coastal Eutrophication: A Land-to-Sea Modelling Approach to the French Coastal English Channel
Provedor de dados: 5
Autores: Garnier, Josette; Riou, Philippe; Le Gendre, Romain; Ramarson, Antsiva; Billen, Gilles; Cugier, Philippe; Schapira, Mathilde; Théry, Sylvain; Thieu, Vincent; Ménesguen, Alain.
The continental coastal waters of the Eastern Channel, from Normandy to Hauts-de-France, are subject to the major influence of unbalanced nutrient inputs from inflowing rivers. Several episodes of harmful algal blooms (HABs) compromising fishing and shellfish farming activities have been observed at the coast. For a better understanding of how the land-to-sea aquatic continuum functions, the GRAFS-RIVERSTRAHLER river biogeochemical model was implemented to cover the watersheds of 11 rivers flowing into this area (including the Seine) and chained with the ecological marine ECO-MARS3D model, applied to the French Northern coastal zone. Human activities strongly impact on the functioning of coastal ecosystems. Specifically, for these fertile soils of Northern...
Tipo: Text
Palavras-chave: Toxic microalgae; Pseudo-nitzschia spp.; River basins; Nutrient flows; Scenarios; Coastal zone ecosystem; Modelling.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70076/68049.pdf

Effects of storm events on the shelf-to-basin sediment transport in the southwestern end of the Gulf of Lions (Northwestern Mediterranean)
Provedor de dados: 5
Autores: Palanques, A.; Puig, P.; Guillen, J.; Durrieu De Madron, X.; Latasa, M.; Scharek, R.; Martin, J.
Shelf-to-basin sediment transport during storms was studied at the southwestern end of the Gulf of Lions from November 2003 to March 2004. Waves, near-bottom currents, temperature and sediment fluxes were measured on the inner shelf at 28-m depth, in the Cap de Creus submarine canyon head at 300-m depth and in the northwestern Mediterranean basin at 2350-m depth. This paper is a synthesis of results published separately in different papers; it includes some new data and focusses on the subject of storms. It is the first paper in which simultaneous data about the effect of storms on the shelf, the slope and in the basin are shown together. During the winter studied, there were two severe E-SE storms with significant wave heights &gt;= 7 m: one in December...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00289/39977/38562.pdf

Influence of an aggregate extraction in remobilizing contaminants from sediments in surface waters of the Bay of Seine (France)
Provedor de dados: 5
Autores: Menet-nedelec, Florence; Riou, Philippe; Chiffoleau, Jean-francois; Maheux, Frank; Pierre-duplessix, Olivier; Rabiller, Emilie; Simon, Benjamin.
In coastal areas where monitoring data show that fine sediments contain contaminants, remobilization of these materials during aggregate extractions, which create a turbidity plume, might influence water quality. The eastern bay of Seine (France) is under the influence of the Seine plume, one of the most contaminated rivers in Europe. This study aimed at investigating remobilization of metals and organics from sediments in surface water during and after an aggregate dredging, through their behavior between total and dissolved phases. In this study area located 20 kilometers off Le Havre, sediments where sampled to identify potential contaminants. Unfiltered and filtered (&lt; 0,2 µm) surface seawater samples were collected at different stages of the...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00310/42077/41380.pdf

Oceanographic features and limited dispersal shape the population genetic structure of the vase sponge Ircinia campana in the Greater Caribbean
Provedor de dados: 5
Autores: Griffiths, Sarah M.; Butler, Mark J.; Behringer, Donald C.; Pérez, Thierry; Preziosi, Richard F.
Understanding population genetic structure can help us to infer dispersal patterns, predict population resilience and design effective management strategies. For sessile species with limited dispersal, this is especially pertinent because genetic diversity and connectivity are key aspects of their resilience to environmental stressors. Here, we describe the population structure of Ircinia campana, a common Caribbean sponge subject to mass mortalities and disease. Microsatellites were used to genotype 440 individuals from 19 sites throughout the Greater Caribbean. We found strong genetic structure across the region, and significant isolation by distance across the Lesser Antilles, highlighting the influence of limited larval dispersal. We also observed...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00641/75333/75996.pdf

Fifty years of ecological changes: Regime shifts and drivers in a coastal Mediterranean lagoon during oligotrophication
Provedor de dados: 5
Autores: Derolez, Valerie; Malet, Nathalie; Fiandrino, Annie; Lagarde, Franck; Richard, Marion; Ouisse, Vincent; Bec, Beatrice; Aliaume, Catherine.
Thau lagoon is a large Mediterranean coastal lagoons and it supports traditional shellfish farming activities. It has been subject to eutrophication leading to major anoxic events associated with massive mortalities of shellfish stocks. Since the 1970s, improvements have been made to wastewater treatment systems, which have gradually led to oligotrophication of the lagoon. The aim of our study was to determine how the decrease in nutrient inputs resulted in major ecological changes in Thau lagoon, by analysing five decades of time-series (1970–2018) of observations on pelagic and benthic autotrophic communities. We were able to identify two periods during the oligotrophication process. Period 1 (1970–1992) was considered a eutrophic period, characterised...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74068/73521.pdf

Argos-3 Satellite Communication System: Implementation on the Arvor Oceanographic Profiling Floats
Provedor de dados: 5
Autores: Andre, Xavier; Moreau, Bertrand; Le Reste, Serge.
The scientific community observes the ocean for applications in the fields of oceanography and climate research. In order to recover in situ data, more than 3,000 profiling floats are operated in the framework of the Argo Program. Each float performs cycles between the sea surface and a depth of 2,000 meters. Scientific data are gathered while the float is travelling upward from the depths of the oceans, and are then transmitted via a satellite communication system at the end of each cycle. During its time at the surface, mainly dedicated to transmissions, the float is vulnerable and subject to drift, which limits its use in many studies. Moreover, transmission times are becoming longer due to a trend towards high resolution or multi-sensor profiles....
Tipo: Text
Palavras-chave: Buoy observations; In situ oceanic observations; Instrumentation; Sensors; Profilers; Oceanic.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00284/39519/38011.pdf

Benthic foraminifera as bio-indicators of drill cutting disposal in tropical east Atlantic outer shelf environments
Provedor de dados: 5
Autores: Mojtahid, Meryem; Jorissen, Frans; Durrieu, Josiane; Galgani, Francois; Howa, Helene; Redois, Fabrice; Camps, Roger.
We present a study of benthic foraminiferal. faunas from the outer continental shelf off Congo (tropical West Africa), with the aim to determine the impact of the discharge of oily drill cuttings on the sea floor environment, to judge the regenerating capacity of the benthic ecosystem, and to investigate the possibility to develop an environmental monitoring method for open marine continental shelf environments, based on benthic foraminifera. We studied the spatial distribution and microhabitats of living and dead foraminiferal faunas, sampled in April 2003, 4 years after the end of disposal activities, in the upper 3 cm of the sediment at 9 stations (about 180 m depth) offshore Congo, that were subject to various degrees of pollution by oily cuttings from...
Tipo: Text
Palavras-chave: Oily cuttings; Opportunistic taxa; Drill mud; Bio indicator; Eutrophication; Outer shelf; Benthic foraminifera.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2170.pdf

Atmospheric occurrence, transport and deposition of polychlorinated biphenyls and hexachlorobenzene in the Mediterranean and Black seas
Provedor de dados: 5
Autores: Berrojalbiz, N.; Castro-jimenez, Javier; Mariani, G.; Wollgast, J.; Hanke, G.; Dachs, J.
The Mediterranean and Black seas are unique marine environments subject to important anthropogenic pressures due to direct and indirect loads of atmospheric inputs of organochlorine compounds (OCls) from primary and secondary sources. Here we report the results obtained during two east-west sampling cruises in June 2006 and May 2007 from Barcelona to Istanbul and Alexandria, respectively, where gas-phase and aerosol-phase samples were collected. Both matrices were analyzed for 41 polychlorinated biphenyls (PCBs), including dioxin-like congeners, and hexachlorobenzene (HCB). The values reported in this study for gas-phase HCB and Sigma 41PCB limit of detection (LOD) to 418.3 pg m(-3) and from 81.99 to 931.6 pg m(-3) respectively) are in the same range of...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00645/75723/76678.pdf

Impact of precession on the climate, vegetation and fire activity in southern Africa during MIS4
Provedor de dados: 5
Autores: Woillez, M.n; Levavasseur, G.; Daniau, A. -l.; Kageyama, M.; Urrego, D. H.; Sanchez Goni, Maria Fernanda; Hanquiez, Vincent.
The relationships between climate, vegetation and fires are a major subject of investigation in the context of climate change. In southern Africa, fire is known to play a crucial role in the existence of grasslands and Mediterranean-type biomes. Microcharcoal-based reconstructions of past fire activity in that region have shown a tight correlation between grass-fueled fires and the precessional cycle, with maximum fire activity during maxima of the climatic precession index. These changes have been interpreted as the result of changes in fuel load in response to precipitation changes in eastern southern Africa. Here we use the general circulation model IPSL_CM5A (Institut Pierre Simon Laplace Climate Model version 5A) and the dynamic vegetation model...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00274/38485/36952.pdf

Mysidacés du plancton marocain
Provedor de dados: 5
Autores: Furnestin, Marie-louise.
This work is part of a series of studies devoted to zooplankton collected off the Atlantic coast of Morocco between 1947 and 1953. The observations reported here were recorded from 1948 to 1950. The first inventory (1957) of the Mysidacea added six new species to the lists established by Tattersall (1927) and Nouvel (1951). Since then, we discovered two other species new to Morocco and compiled some ecological data that constitutes the main subject of this paper....
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-4497.pdf

Canyons sous-marins et advection vers le talus continental du plancton néritique
Provedor de dados: 5
Autores: Macquartmoulin, C; Patriti, G.
Increased offshore advection of migratory neritic plankton may occur by the pathway of nearshore submarine canyons. The nocturnal distribution of migratory bentho-hyponeustonic crustacea was investigated in the axis and on both sides of three submarine canyons, over the continental shelf and slope of the northwestern Mediterranean. The three canyons arc frequently exposed to strong northerly and northwesterly winds blowing seaward. A horizontal surface haul and a vertical haul from bottom to surface were successively achieved with an OMORI plankton net over each depth, from the isobath 50 m to more than 1000 m, in the middle of the night. The Mysidacea Anchialina agilis, Haplostylus lobatus, Siriella clausii, Siriella norvegica and Leptomysis gracilis, and...
Tipo: Text
Palavras-chave: PLANKTON; CANYONS; ADVECTION; MYSIDACEA; ISOPODA.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00099/21045/18671.pdf

La productivite naturelle et la reglementation comme determinants de la valeur du foncier ostreicole: Un modele de prix hedoniques spatial applique au Bassin d'Arcachon
Provedor de dados: 5
Autores: Lesur-irichabeau, Gabrielle.
Afin de montrer l'importance de la reglementation et de la productivite naturelle dans la valorisation des surfaces de production ostreicoles, nous avons estime une fonction de prix hedonique des concessions ostreicoles arcachonnaises. Les &lt;&lt; terres ostreicoles &gt;&gt; ont comme particularite d'etre des concessions du Domaine Public Maritime et sont a ce titre soumises a son regime protecteur. Neanmoins, loin d'entraver l'activite ostreicole par les contraintes qu'elle impose, la reglementation se revele etre une garante du maintien d'un niveau satisfaisant de productivite naturelle des concessions pour permettre une reproduction et une croissance des huitres dans des conditions favorables. Ainsi, les resultats de la modelisation montrent que plus...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00144/25500/24452.pdf

Prolonged recovery time after eruptive disturbance of a deep-sea hydrothermal vent community
Provedor de dados: 5
Autores: Mullineaux, L. S.; Mills, S. W.; Le Bris, N.; Beaulieu, S. E.; Sievert, S. M.; Dykman, L. N.
Deep-sea hydrothermal vents are associated with seafloor tectonic and magmatic activity, and the communities living there are subject to disturbance. Eruptions can be frequent and catastrophic, raising questions about how these communities persist and maintain regional biodiversity. Prior studies of frequently disturbed vents have led to suggestions that faunal recovery can occur within 2–4 years. We use an unprecedented long-term (11-year) series of colonization data following a catastrophic 2006 seafloor eruption on the East Pacific Rise to show that faunal successional changes continue beyond a decade following the disturbance. Species composition at nine months post-eruption was conspicuously different than the pre-eruption ‘baseline' state, which had...
Tipo: Text
Palavras-chave: Succession; Hydrothermal vent; Disturbance; Resilience; Seafloor eruption; Colonization.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00665/77686/79757.pdf

Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries
Provedor de dados: 5
Autores: Lira, Alex; Angelini, Ronaldo; Le Loc'H, Francois; Menard, Frederic; Lacerda, Carlos; Fredou, Thierry; Fredou, Flavia Lucena.
We developed an Ecopath model in the Estuary of Sirinhaém River (SIR), a small-sized system surrounded by mangroves, subject to high impact, mainly by sugar cane industry and other farming industries in order to describe the food web structure and trophic interactions. In addition, we compared our findings with those of 20 available Ecopath estuarine models for tropical, subtropical and temperate regions, aiming to synthesize the knowledge on trophic dynamics and provide a comprehensive analysis of the structures and functioning of estuaries. Our model consisted of 25 compartments and its indicators were within the expected range for estuarine areas around the world. The average trophic transfer efficiency for the entire system was 11.8%, similar to the...
Tipo: Text
Palavras-chave: Tropical estuary; Ecopath; Food web; Global comparison of ecological indicators.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53929/55061.pdf

Scientific rationale and international obligations for protection of active hydrothermal vent ecosystems from deep-sea mining
Provedor de dados: 5
Autores: Van Dover, C. L.; Arnaud-haond, Sophie; Gianni, M.; Helmreich, S.; Huber, J. A.; Jaeckel, A. L.; Metaxas, A.; Pendleton, L. H.; Petersen, S.; Ramirez-llodra, E.; Steinberg, P. E.; Tunnicliffe, V.; Yamamoto, H.
There is increasing interest in mining minerals on the seabed, including seafloor massive sulfide deposits that form at hydrothermal vents. The International Seabed Authority is currently drafting a Mining Code, including environmental regulations, for polymetallic sulfides and other mineral exploitation on the seabed in the area beyond national jurisdictions. This paper summarizes 1) the ecological vulnerability of active vent ecosystems and aspects of this vulnerability that remain subject to conjecture, 2) evidence for limited mineral resource opportunity at active vents, 3) non-extractive values of active vent ecosystems, 4) precedents and international obligations for protection of hydrothermal vents, and 5) obligations of the International Seabed...
Tipo: Text
Palavras-chave: Polymetallic sulfides; Seafloor Massive Sulfides (SMS); International Seabed Authority (ISA); Convention on Biological Diversity (CBD); Vulnerable Marine Ecosystems (VME); Precautionary approach; Deep-sea conservation.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00425/53627/54454.pdf

Temperature versus salinity gradients below the ocean mixed layer
Provedor de dados: 5
Autores: Helber, Robert W.; Kara, A. Birol; Richman, James G.; Carnes, Michael R.; Barron, Charlie N.; Hurlburt, Harley E.; Boyer, Timothy.
We characterize the global ocean seasonal variability of the temperature versus salinity gradients in the transition layer just below the mixed layer using observations of conductivity temperature and depth and profiling float data from the National Ocean Data Center's World Ocean Data set. The balance of these gradients determines the temperature versus salinity control at the mixed layer depth (MLD). We define the MLD as the shallowest of the isothermal, isohaline, and isopycnal layer depths (ITLD, IHLD, and IPLD), each with a shared dependence on a 0.2 degrees C temperature offset. Data are gridded monthly using a variational technique that minimizes the squared analysis slope and data misfit. Surface layers of vertically uniform temperature, salinity,...
Tipo: Text
Palavras-chave: Density compensation; Mixed layer depth; Transition layer.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00383/49452/49917.pdf

Recherche de defauts de collage dans les structures sandwich
Provedor de dados: 5
Autores: Darold, L; Blanco, E.
One of the major defects that can be found on composite sandwich structures is poor bonding of the core on the exterior skins, particularly with the technique of bonding under vacuum. Therefore, we have looked at all the possible means of detecting these bonding defects, with two objectives: to be able to control integrally a piece of large dimensions, and to be able to control the piece in the course of manufacturing, that is to say after the bonding on the first skin. All of the non-destructive test methods now known have therefore been tested, and in particularly infrared thermography, ultrasonic control, and acoustic methods. This study, carried out in collaboration with the CETIM, the STCAN, Aerospatiale and other laboratories and companies without...
Tipo: Text
Palavras-chave: Adhesion; Ship technology; Composite materials; Contrôle non destructif; Structure sandwich.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1049.pdf

Evaluation of two library-independent microbial source tracking methods to identify sources of fecal contamination in french estuaries
Provedor de dados: 5
Autores: Gourmelon, Michele; Caprais, Marie-paule; Segura, Raphael; Le Mennec, Cecile; Lozach, Solen; Piriou, Jean-yves; Rince, A.
In order to identify the origin of the fecal contamination observed in French estuaries, two library-independent microbial source tracking (MST) methods were selected: (i) Bacteroidales host-specific 16S rRNA gene markers and (ii) F-specific RNA bacteriophage genotyping. The specificity of the Bacteroidales markers was evaluated on human and animal (bovine, pig, sheep, and bird) feces. Two human-specific markers (HF183 and HF134), one ruminant-specific marker (CF193'), and one pig-specific marker (PF163) showed a high level of specificity (&gt;90%). However, the data suggest that the proposed ruminant-specific CF128 marker would be better described as an animal marker, as it was observed in all bovine and sheep feces and 96% of pig feces. F RNA...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3535.pdf

Near-surface structures in the Cape Ghir filament off Morocco
Provedor de dados: 5
Autores: Hagen, E; Zulicke, C; Feistel, R.
A meso-scale CTD survey was conducted off Cape Ghir (31 degrees N) from 29 September to 3 October 1992, with the inspection of mass-field structures in the 300 dbar layer as its main objective, and relatively large tongue of cold surface water as the subject of investigation. This filament of upwelled water extends about 200 km seaward from the coastal zone of Morocco. Our CTD survey included two zonal transects 213 km in length, sampled synchronously by R/Vs Hudson along 31 degrees 30' N and A. v.Humboldt along 30 degrees 30' N. A meridional section followed the shelf edge at 10 degrees 10' W, and five zigzag sections were carried out above the Cape Ghir Plateau (CGP). Data resulting from an extended transect, sampled ten days earlier between 9 degrees...
Tipo: Text
Palavras-chave: Coastal upwelling; Filament; Northwest Africa; Water mass; Eddy.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00096/20728/18365.pdf

Controls on turbidite sedimentation: Insights from a quantitative approach of submarine channel and lobe architecture (Late Quaternary Congo fan)
Provedor de dados: 5
Autores: Picot, M.; Droz, L.; Marsset, Tania; Dennielou, Bernard; Bez, M.
The role of internal and external forcing of sedimentation in turbidite systems remains a subject of debate. Here we propose new insights from the quantitative analysis of architectural parameters of the Congo Axial Fan.  Fifty-two channel-levee-lobe systems, spanning the last ca. 200 ka, are visible on the seafloor, most of them having slightly elongated lobe complexes at their termination. Volumes of lobe complexes (usually 3 to 196 km3) are highly variable in time and space. The cumulative volume of the lobe complexes represents approximately 30% of the volume of the Axial Fan.  The Axial Fan is sequentially divided into periods of increasing/decreasing channel lengths and basinward/landward migrations of avulsion points, representing successive...
Tipo: Text
Palavras-chave: Turbidite system; Congo; Late Quaternary; Lobe complexes; Sedimentary cycles; Avulsion; Bathymetry; Seismic profiles.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00312/42285/41610.pdf

Coupling a watershed model of the Seine river with a 3D ecological model of the English Channel in order to study eutrophication problems
Provedor de dados: 5
Autores: Cugier, Philippe; Passy, Paul; Callens, Julie; Garnier, Josette; Riou, Philippe; Billen, Gilles; Le Gendre, Romain; Paris, Francois.
Eutrophication of the Seine river/estuary/bay continuum of the French coast of the English Channel is a subject of growing concern. Because of huge nutrient inputs from the Seine river, with an excess of nitrogen over phosphorus and silica, chlorophyll concentrations reach very high level and episodic blooms of toxic dinoflagellates are regularly observed. In order to better understand the relationship between these ecological processes and the human activities in the Seine watershed, two models have been developed and used in connection : 1/ a model describing nutrient (N, P, Si) transfer processes at the scale of the whole Seine Basin (SENEQUE/RIVERSTRAHLER, Thieu et al, 2009), allowing human activity (agricultural practices, waterscape management, urban...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00061/17211/15019.pdf

Ionian Abyssal Plain: A window into the Tethys oceanic lithosphere
Provedor de dados: 5
Autores: Dannowski, Anke; Kopp, Heidrun; Klingelhoefer, Frauke; Klaeschen, Dirk; Gutscher, Marc-andre; Krabbenhoeft, Anne; Dellong, David; Rovere, Mickael; Graindorge, David; Papenberg, Cord; Klaucke, Ingo.
The nature of the Ionian Sea crust has been the subject of scientific debate for more than 30 years, mainly because seismic imaging of the deep crust and upper mantle of the Ionian Abyssal Plain (IAP) has not been conclusive to date. The IAP is sandwiched between the Calabrian and Hellenic subduction zones in the central Mediterranean. To univocally confirm the proposed oceanic nature of the IAP crust as a remnant of the Tethys ocean and to confute its interpretation as a strongly thinned part of the African continental crust, a NE-SW oriented 131 km long seismic refraction and wide-angle reflection profile consisting of eight ocean bottom seismometers and hydrophones was acquired in 2014. A P-wave velocity model developed from travel time forward...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00473/58431/61006.pdf

Biological, physiological, immunological and nutritional assessment of farm-reared Litopenaeus stylirostris shrimp affected or unaffected by vibriosis
Provedor de dados: 5
Autores: Mugnier, Chantal; Justou, Carole; Lemonnier, Hugues; Patrois, Jacques; Ansquer, Dominique; Goarant, Cyrille; Le Coz, Jean-rene.
Shrimp aquaculture in New Caledonia is subject to seasonal mortalities during grow-out due to highly virulent Vibrio nigripulchritudo (Vn). To understand the mechanisms affecting shrimp resistance and leading to significant mortality, a shrimp ecophysiology and immunology survey was conducted on two farms, the first considered as a "control" farm (HC), the second affected by the disease (DF). Mortality observed during the survey at DF started 50 days after stocking and was typical of this disease. The main observations regarding shrimp were: (a) growth was not affected by the disease and was faster in the DF than in the HC pond; (b) disease did not affect one sex more than the other, or a specific part of the population in terms of weight; (c) the physical...
Tipo: Text
Palavras-chave: Vibriosis; Penaeid shrimp; Field survey; Physiology; Immunology; Nutritional status.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28764/27567.pdf

The red coral (Corallium rubrum) transcriptome: a new resource for population genetics and local adaptation studies
Provedor de dados: 5
Autores: Pratlong, M.; Haguenauer, A.; Chabrol, O.; Klopp, C.; Pontarotti, P.; Aurelle, D.
The question of species survival and evolution in heterogeneous environments has long been a subject for study. Indeed, it is often difficult to identify the molecular basis of adaptation to contrasted environments, and nongenetic effects increase the difficulty to disentangle fixed effects, such as genetic adaptation, from variable effects, such as individual phenotypic plasticity, in adaptation. Nevertheless, this question is also of great importance for understanding the evolution of species in a context of climate change. The red coral (Corallium rubrum) lives in the Mediterranean Sea, where at depths ranging from 5 to 600m, it meets very contrasted thermal conditions. The shallowest populations of this species suffered from mortality events linked...
Tipo: Text
Palavras-chave: Cnidarians; Gene expression; Local adaptation; Octocoral polymorphism; Transcriptome.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00371/48257/48661.pdf

Premières observations sur les valeurs de poids sec chez quelques copépodes de méditerranée
Provedor de dados: 5
Autores: Mazza, Jacques.
Works on plankton carried out to this day in the Mediterranean Sea only very rarely measure dry weight of the different organisms (Vucetic, 1957; Deveze, 1959). However, many northern European, Soviet and American researchers frequently use quantities of dry planktonic matter to express their results. Trégouboff (1961) in re-examining the data of Bogorov (1957) underlines the importance of this procedure in quantitative studies. We will first address this aspect of the issue.We always use dry weight and not wet weight. The wet weight of an organism depends mainly on, as we will see later, the percentage of water that composes it and this percentage is very variable. Dry weight (organic substances and ashes) is less subject to variation.
Tipo: Text
Ano: 1964
URL: http://archimer.ifremer.fr/doc/1964/publication-4048.pdf

Deep transcriptome-sequencing and proteome analysis of the hydrothermal vent annelid Alvinella pompejana identifies the CvP-bias as a robust measure of eukaryotic thermostability
Provedor de dados: 5
Autores: Holder, Thomas; Basquin, Claire; Ebert, Judith; Randel, Nadine; Jollivet, Didier; Conti, Elena; Jekely, Gaspar; Bono, Fulvia.
Background: Alvinella pompejana is an annelid worm that inhabits deep-sea hydrothermal vent sites in the Pacific Ocean. Living at a depth of approximately 2500 meters, these worms experience extreme environmental conditions, including high temperature and pressure as well as high levels of sulfide and heavy metals. A. pompejana is one of the most thermotolerant metazoans, making this animal a subject of great interest for studies of eukaryotic thermoadaptation.  Results: In order to complement existing EST resources we performed deep sequencing of the A. pompejana transcriptome. We identified several thousand novel protein-coding transcripts, nearly doubling the sequence data for this annelid. We then performed an extensive survey of previously established...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00185/29627/28001.pdf

High resolution overview of phytoplankton spectral groups and hydrological conditions in the eastern English Channel using unsupervised clustering
Provedor de dados: 5
Autores: Lefebvre, Alain; Poisson-caillault, Emilie.
As we move towards shipboard-underway and automated systems for monitoring water quality and assessing ecological status, there is a need to evaluate how effective the existing monitoring systems are, and how we could improve them. Considering the existing limitations for processing numerous and complex data series generated from automated systems, and because of processes involved in phytoplankton blooms, this paper proposes a data-driven evaluation of an unsupervised classifier to optimize the way we track phytoplankton, including harmful algal blooms (HABs), and to identify the main associated hydrological conditions. We used in situ data from a portable flow-through automatic measuring system coupled with a multi-fixed-wavelength fluorometer...
Tipo: Text
Palavras-chave: Clustering; Spectral fluorescence; Phaeocystis globosa; English Channel Ferry Box; MSFD; Marine Strategy Framework Directive.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00479/59043/61793.pdf

Morphology and Timing of Submarine Mass Movements on the Northwest British Continental Margin
Provedor de dados: 5
Autores: Owen, Matthew John.
A variety of factors influence the stability of submarine slopes and this thesis investigates those operating on the northwest British continental margin and Barra Fan. Through analysis of North Atlantic sector submarine mass movements, a conceptual model of continental slope failure is proposed and examined against the Peach slide case study. Situated on the eastern flank of the Rockall Trough, the Barra Fan is subject to cyclonic ocean circulation and has experienced growth since continental uplift during the mid-Pliocene. Surface and shallow-subsurface morphology of the fan is determined using pinger sub-bottom profile (paper records scanned and converted to SEGY format), sidescan sonar and multibeam echosounder data. A number of different acoustic...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00499/61041/64448.pdf

Impact of Brown Ring Disease on the energy budget of the Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Flye Sainte Marie, Jonathan; Pouvreau, Stephane; Paillard, Christine; Jean, Fred.
Brown Ring Disease (BRD) is a bacterial disease caused by the pathogen, Vibrio tapetis. The disease induces formation of a brown deposit on inner shell of the Manila clam, Ruditapes philippinarum. Development of this disease is correlated with a decrease in the condition index of infected clams. Experiments were conduced in order to assess the effect of the development of BRD on two parameters affecting the energy balance of the clams: the clearance and the respiration rates. Experiments were performed in a physiological measurement system that allowed simultaneous measures of clearance and respiration rates. During both acclimation and measurements clams were fed with cultured T-iso and temperature was close to seasonal field temperature (10 degrees C....
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Respiration rate; Filtration; Energy budget; Clearance rate; Brown Ring Disease.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3013.pdf

Catch-quota balancing in mixed-fisheries: a bio-economic modelling approach applied to the New Zealand hoki (Macruronus novaezelandiae) fishery
Provedor de dados: 5
Autores: Marchal, Paul; Francis, Chris; Lallemand, Philippe; Lehuta, Sigrid; Mahevas, Stephanie; Stokes, Kevin; Vermard, Youen.
Managing adequately the exploitation of commercial species subject to technical interactions is a key step towards the ecosystem approach to fisheries. We evaluate here, using a bio-economic modelling approach building on the ISIS-Fish simulation platform, the relative impact of total allowable commercial catches (TACC) and of taxes applicable to over-quota landings (deemed value) on the sustainability of a selection of species exploited by the New Zealand hoki (Macruronus novaezelandiae) fishery. We investigate some aspects of the hoki mixed fisheries, consisting of four fleets and nineteen metiers, by considering the technical interactions between hoki and Southern hake (Merluccius australis). The dynamics of effort allocation were modelled using gravity...
Tipo: Text
Palavras-chave: Fleet dynamics; New Zealand hoki fishery; Deemed value; Fisheries management.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11168/7521.pdf

Massive Gene Expansion and Sequence Diversification Is Associated with Diverse Tissue Distribution, Regulation and Antimicrobial Properties of Anti-Lipopolysaccharide Factors in Shrimp
Provedor de dados: 5
Autores: Matos, Gabriel Machado; Schmitt, Paulina; Barreto, Caire; Farias, Natanael Dantas; Toledo-silva, Guilherme; Guzman, Fanny; Destoumieux Garzon, Delphine; Perazzolo, Luciane Maria; Rosa, Rafael Diego.
Anti-lipopolysaccharide factors (ALFs) are antimicrobial peptides with a central β-hairpin structure able to bind to microbial components. Mining sequence databases for ALFs allowed us to show the remarkable diversity of ALF sequences in shrimp. We found at least seven members of the ALF family (Groups A to G), including two novel Groups (F and G), all of which are encoded by different loci with conserved gene organization. Phylogenetic analyses revealed that gene expansion and subsequent diversification of the ALF family occurred in crustaceans before shrimp speciation occurred. The transcriptional profile of ALFs was compared in terms of tissue distribution, response to two pathogens and during shrimp development in Litopenaeus vannamei, the most...
Tipo: Text
Palavras-chave: Host defense peptide; Antimicrobial peptide; Anti-LPS factor; Hostmicrobe relationship; Functional diversity; Invertebrate immunity; Crustacean; Antimicrobial activity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00464/57523/59711.pdf

The Mediterranean Targeted Project MATER - a multiscale approach of the variability of a marine system - overview
Provedor de dados: 5
Autores: Monaco, André; Peruzzi, Stefano.
The papers presented in this volume represent only a small part of the results obtained within the scope of the first integrated programme concerning the Mediterranean Sea. The latter is considered as a downscaled model of the ocean system, and a regional sea for the targeted projects supported by the European Commission. Whatever the domain is, the variability of the system appeared as a major feature. Consequently, this theme has been selected, among the main initial objectives, as the central subject of this volume. Spatial and temporal variabilities are considered, at different scales and at different (water, particles, sediment, trophic) levels of the marine ecosystem. In the hereafter contributions, one will find the long-term (millenar, secular and...
Tipo: Text
Palavras-chave: Climate; Pluridisciplinary; Variability; Mediterranean; Marine system.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-783.pdf

Impact of winter storms on sediment erosion in the Rhone River prodelta and fate of sediment in the Gulf of Lions (North Western Mediterranean Sea)
Provedor de dados: 5
Autores: Dufois, Francois; Verney, Romaric; Le Hir, Pierre; Dumas, Franck; Charmasson, Sabine.
In this study a three-dimensional sediment transport model was developed. The model accounts for both current and wave forcing on the sediment and was implemented over the Gulf of Lions. A two-way nesting technique was used to focus on the Rhone River prodelta which is considered as a sink for riverine sediment. In addition, to understand the resuspension of trapped sediment over the Rhone prodelta, an in situ experiment, called SCOPE, was conducted during the winter 2007/2008. The experiment consisted of measuring hydro-sedimentary parameters using a mooring station comprising a current profiler (ADCP) and an altimeter (acoustic transducer) located in the eastern part of the Rhone prodelta. The three-dimensional transport model was validated using these...
Tipo: Text
Palavras-chave: Sediment transport; Gulf of Lions; Rhone prodelta; 3D modelling; ADCP; ALTUS.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00165/27584/25743.pdf

Report on the Mastodon2D mooring system
Provedor de dados: 5
Autores: Lazure, Pascal; Pairaud, Ivane; Leizour, Stephane; Puillat, Ingrid.
Temperature distributions on continental shelves (depth &lt; 150m) are often complex because the many physical processes induce very high spatial (both horizontal and vertical) and temporal variability. Temporal variability extends from a few tens of minutes for solitons (internal wave), a few hours for internal tide and inertial waves to a few days for upwelling or sub mesoscale dynamics. In the 1980s, satellites provided access to knowledge of surface temperatures. On the other hand, the internal temperature structure still requires in-situ measurements, which leads to the deployment of moorings at sea. These operations are often expensive and risky because the coastal zone is generally subject to intense activities such as fishing and sea conditions can...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00630/74245/73875.pdf

Caractérisation d'effets de sillages rencontrés en milieu offshore
Provedor de dados: 5
Autores: Gaurier, Benoit; Germain, Gregory; Le Boulluec, Marc; Giry, Eric; Fontaine, E.
The interactions between several cylinders placed in close proximity are the subject of many studies, because of the strong repeated loads that they create on these structures. For flexible or mobile structures, the wake effects can produce large amplitudes motions. These displacements can be higher than those considered during the lock-in of a single cylinder, to reach several diameters. Depending the initial spacing, they lead sometimes to clashes with potentially high intensity, between the cylinders. To better understand these phenomena, an experimental study was carried out, bearing on the interaction between two models of tensioning buoy supporting hybrid risers. After checking that the models used were able to correctly reproduce the movements...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00023/13439/10447.pdf

The role of the Agulhas in the Benguela Current System: A numerical modelling approach
Provedor de dados: 5
Autores: Veitch, Jennifer A.; Penve, Pierrick.
A modelling approach is used to investigate the influence of the Agulhas on the southern Benguela system. Two climatological ROMS simulations are run that are identical except that in one of them the effect of the Agulhas is removed. Comparing their output allows for a clear indication of the role of the Agulhas on both the large-scale and shelf dynamics. About 15 Sv of the mean transport of the Benguela Current is shown to be contributed by Agulhas influx, with the most intense flow being associated with extreme turbulence and its meandering nature is a reflection of the passage of Agulhas Rings. The injection of warm water is particularly evident beyond the shelf-edge, producing a perennially intense cross-shelf density front that is enhanced during...
Tipo: Text
Palavras-chave: Modeling; Benguela Current system; Agulhas leakage.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00383/49393/49826.pdf

Influence of sudden salinity variation on the physiology and domoic acid production by two strains of   Pseudo-nitzschia australis
Provedor de dados: 5
Autores: Ayache, Nour; Hervé, Fabienne; Martin-jézéquel, Veronique; Amzil, Zouher; Caruana, Amandine.
Several coastal countries including France have experienced serious and increasing problems related to Pseudo‐nitzschia toxic blooms. These toxic blooms occur in estuarine and coastal waters potentially subject to fluctuations in salinity. In this study, we document for the first time the viability, growth, photosynthetic efficiency and toxin production of two strains of Pseudo‐nitzschia australis grown under conditions with sudden salinity changes. Following salinity variation, the two strains survived over a restricted salinity range of 30 to 35, with favorable physiological responses, as the growth, effective quantum yield and toxin content were high compared to the other conditions. In addition, high cellular quotas of domoic acid (DA) were observed at...
Tipo: Text
Palavras-chave: Amnesic shellfish poisoning; Domoic acid; Harmful algae; Pseudo-nitzschia australis; Salinity stress.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00462/57385/59465.pdf

Lobophora   (Dictyotales) Species Richness, Ecology and Biogeography Across the North   ‐   Eastern Atlantic Archipelagos and Description of Two New Species   1
Provedor de dados: 5
Autores: Vieira, Christophe; Henriques, Filipe; D'Hondt, Sofie; Neto, Ana; Almada, Carmen H.; Kaufmann, Manfred; Sansón, Marta; Sangil, Carlos; Clerck, Olivier De.
The brown alga Lobophora (Dictyotales, Phaeophyceae) is an important macroalga in the North‐eastern Atlantic archipelagos (i.e., Macaronesia). Notably in the Canaries it can dominate benthic assemblages. While the genus has been the subject of several ecological studies in the Canaries, no study has yet been conducted to assess species‐level diversity of Lobophora in Macaronesia. We reassessed the diversity of Lobophora in Macaronesia, reporting the presence of seven species (L. caboverdeana sp. nov., L. canariensis, L. dagamae sp. nov., L. delicata, L. dispersa, L. littlerorum, and L. schneideri). Lobophora spp. from Macaronesia are morphologically and ecologically distinguishable. In the Canaries, L. schneideri dominates the photophilic assemblages from...
Tipo: Text
Palavras-chave: Barcoding; Cox3; Macaronesia; Phylogeny; Molecular taxonomy.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76573/77704.pdf

Teneur en acide alginique d'une population de Laminaria Digitata Lamouroux du plateau du Calvados
Provedor de dados: 5
Autores: Perez, René.
The content of alginic acid of the Laminaria Digitata Lamouroux populations living, in the western part for most of them, of the plateau du Calvados is not well-known. The only few values given on this subject result from short studies restricted to the summer season. We tried, under the direction of Mrs GAYRAL, professor at the Faculty of Sciences of Caen, to determine, month by month, for a year, the content of alginic acid of the algae living in the upper sublittoral zone off Luc-sur-Mer. The samples analysed were collected on "Quihot", a rock emerging on medium spring tides.  We quickly realised that measuring this value precisely raised a large amount of difficulties as the content of alginic acid fluctuates a lot, according to the measured sample, as...
Tipo: Text
Ano: 1967
URL: http://archimer.ifremer.fr/doc/1967/publication-3759.pdf

Mesoscale variability in the Arabian Sea from HYCOM model results and observations: impact on the Persian Gulf Water path
Provedor de dados: 5
Autores: L'Hegaret, P.; Duarte, R.; Carton, Xavier; Vic, Clement; Ciani, Daniele; Baraille, R.; Correard, S.
The Arabian Sea and Sea of Oman circulation and water masses, subject to monsoon forcing, reveal a strong seasonal variability and intense mesoscale features. We describe and analyze this variability and these features, using both meteorological data (from ECMWF reanalyses), in situ observations (from the ARGO float program and the GDEM - Generalized Digital Environmental mode - climatology), satellite altimetry (from AVISO) and a regional simulation with a primitive equation model (HYCOM - the Hybrid Coordinate Ocean Model). The model and observations display comparable variability, and the model is then used to analyze the three-dimensional structure of eddies and water masses with higher temporal and spatial resolutions than the available observations....
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00286/39690/38149.pdf

Consistent relationship between global climate and surface nitrate utilization in the western subarctic Pacific throughout the last 500 ka
Provedor de dados: 5
Autores: Galbraith, Eric D.; Kienast, Markus; Jaccard, Samuel L.; Pedersen, Thomas F.; Brunelle, Brigitte G.; Sigman, Daniel M.; Kiefer, Thorsten.
[1] The open subarctic Pacific is, at present, a high nitrate low chlorophyll (HNLC) region, where nitrate is perennially abundant at the surface. Theoretically, the HNLC status of this region is subject to modification by ocean circulation and/or micronutrient supply, with implications for the effectiveness of the biological pump and hence carbon sequestration in the ocean interior. Records of biogenic detritus in sediments from throughout the subarctic Pacific indicate that export production was generally lower during glacial maxima, while nitrogen isotope measurements from the Bering Sea have shown that nitrate consumption there was more complete during the last glacial period than it is today. Here, nitrogen isotopic analyses of bulk sediments (delta...
Tipo: Text
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00237/34840/33281.pdf

Complément a l'étude des Chaetognathes de la cote d'ivoire (espèces profondes)
Provedor de dados: 5
Autores: De Saint-bon, Istpm.
While the surface plankton of the Atlantic coast of West Africa has already been well studied and chaetognaths have been the subject of several works, relatively little is known about the deep-sea fauna of this region. The little we know about the deep-sea fauna is scattered, with some samples taken during surface studies (Senegal and the Gulf of Guinea, Furnestin, 1956, 1959; Congo, Ducret, 1962; Angola, Furnestin 1961, 1962, Neto, 1962; South Africa, Heydorn, 1959). Results from depths below 100 m are more succinct. It was thus of interest to inventory and examine in detail the chaetognaths from the mesoplankton and the bathyplankton of these regions.
Tipo: Text
Ano: 1963
URL: http://archimer.ifremer.fr/doc/1963/publication-4178.pdf

Low-mode internal tide propagation in a turbulent eddy field
Provedor de dados: 5
Autores: Dunphy, Michael; Ponte, Aurelien; Klein, Patrice; Le Gentil, Sylvie.
Understanding how internal tides distort and lose coherence as they propagate through the ocean has been identified as a key issue for interpreting data from the upcoming wide-swath altimeter mission SWOT. This study addresses that issue through the analysis of numerical experiments where a low mode internal tide propagates through a quasi-geostrophic turbulent jet. We present a set of reduced equations based on vertical mode projections that describe the dynamics of the low-mode internal tides as they propagate through the slower turbulent field. Diagnostics of the terms responsible for the interaction between the wave and the slow circulation are computed from the numerical outputs. The large scale change of stratification, on top of eddies and jet...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00342/45364/44853.pdf

Reference fleets identification by LPUE data filtering applied to the striped red mullet (Mullus surmulletus) in the Bay of Biscay
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Lissardy, Muriel; Bru, Noelle; Dutertre, Marie-adèle; Saguet, Cassandre.
The striped red mullet (Mullus surmuletus) is a species for which ICES advances individualization of stocks in Western Europe. One of them concerns the Bay of Biscay, the waters bordering the Iberian Peninsula as well as the Celtic Sea, namely striped red mullet in Subareas and Divisions 6, 7a-c, e-k, 8, and 9a (Mur. 27.67a it-k89a). This stock is part of the Data Limited Stocks (DLS) and is currently classified in Category 5 (ICES, 2016); it is a stock for which only landings data are available. Such knowledge is insufficient to apply the ICES MSY approach and the advice rule on fishing possibilities is therefore based on the precautionary approach. For this stock, this approach is applied since 2012. For 2013 and 2014, ICES has recommended reducing...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00466/57750/60015.pdf

Integrated indicator framework and methodology for monitoring and assessment of hazardous substances and their effects in the marine environment
Provedor de dados: 5
Autores: Vethaak, A. Dick; Davies, Ian M.; Thain, John E.; Gubbins, Matthew J.; Martinez-gomez, Concepcion; Robinson, Craig D.; Moffat, Colin F.; Burgeot, Thierry; Maes, Thomas; Wosniok, Werner; Giltrap, Michelle; Lang, Thomas; Hylland, Ketil.
Many maritime countries in Europe have implemented marine environmental monitoring programmes which include the measurement of chemical contaminants and related biological effects. How best to integrate data obtained in these two types of monitoring into meaningful assessments has been the subject of recent efforts by the International Council for Exploration of the Sea (ICES) Expert Groups. Work within these groups has concentrated on defining a core set of chemical and biological endpoints that can be used across maritime areas, defining confounding factors, supporting parameters and protocols for measurement. The framework comprised markers for concentrations of, exposure to and effects from, contaminants. Most importantly, assessment criteria for...
Tipo: Text
Palavras-chave: Chemical measurements; Biomarker; Bioassay; Pollution effects; Biomonitoring; Environmental; Impact; MSFD; ICES; OSPAR.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00283/39429/37869.pdf

Cadmium pathways in an exploited intertidal ecosystem with chronic cadmium inputs (Marennes-Oleron, Atlantic coast, France)
Provedor de dados: 5
Autores: Pigeot, J; Miramand, P; Guyot, T; Sauriau, Pierre-guy; Fichet, D; Le Moine, Olivier; Huet, V.
The Marennes-Oleron Bay is subject to chronic pollution by cadmium (Cd) from the Gironde watershed. An ecosystem approach was used to study the fate of cadmium in the different biological compartments. The median Cd concentration was 0.4 mu g g(-1) dry weight for the 63 benthic species measured. When combined with the respective biomasses for the different species studied, we estimated that 7 kg of Cd is partitioned into the soft tissues of the benthic species in the bay. The majority of this cadmium was distributed between primary producers, mainly microphytobenthos (40 %), and suspension-feeders, mainly oysters (40 %). All other benthic species measured were associated with negligible masses of Cd. Two trophic levels contained 98 % of the Cd: 3 kg was...
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Trophic food web; Bioaccumulation; Cadmium; Macrofauna; Microphytobenthos; Macrophytes.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3615.pdf

Dynamics of spatial patterns of microphytobenthic biomass: inferences from a geostatistical analysis of two comprehensive surveys in Marennes-Oleron bay (France)
Provedor de dados: 5
Autores: Guarini, Jean-marc; Blanchard, Fabian; Bacher, Cedric; Gros, Philippe; Riera, P; Richard, P; Gouleau, D; Galois, R; Prou, Jean; Sauriau, Pg.
Microphytobenthos plays an important role as primary producer in shallow embayments subject to a tidal regime. The present paper aims to characterize the spatial patterns of sedimentary chlorophyll a (chl a) biomass in 2 seasons in the wide intertidal mudflats of the Marennes-Oleron Bay (France); furthermore, it provides estimates of total microphytobenthic biomass. Accordingly, a systematic sampling scheme was performed in June 1995 and in January 1996. On average, biomass was higher in June (ca 120 mg chi a m(-2)) than in January (ca 85 mg chi a m(-2)). Moreover, the geostatistical analysis revealed that spatial similarities were propagated over larger distances in June (6 km) than in January (2.2 km). In order to account or this result, we suggest that...
Tipo: Text
Palavras-chave: Microphytobenthos; Chlorophyll a; Spatial distribution; Geostatistics; Intertidal mudflat.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00447/55852/58117.pdf

Quality Trait Signature at Archipelago Scale of the Cultured Pearls Produced by the Black-Lipped Pearl Oyster (Pinctada margaritifera Var. cumingi) in French Polynesia
Provedor de dados: 5
Autores: Ky, Chin-long; Okura, Retsu; Nakasai, Seiji; Devaux, Dominique.
In French Polynesia, the aquaculture of Pinctada margaritifera (Linnaeus, 1758) covers a large maritime exploitation area, spread over nearly 20 degrees latitude and longitude, with numerous pearl farms located in three archipelagos (Gambier, Society, and Tuamotu). As these archipelagos have specific seasonal temperature patterns each year, pearl oysters are subject to disparate and contrasting environmental regimes. This study aimed to examine the specificity of commercial pearl quality traits (n ¼ 2,236 samples) at the archipelago scale, in such a way as to provide preliminary data to design the most appropriate strategy for the distribution of hatchery-produced phenotypes. A large and standardized grafting experiment using the same donor phenotype was...
Tipo: Text
Palavras-chave: Pearl oyster; Pinctada margaritifera; Large-scale geographic effects; Pearl color; Pearl grade; Pearl shape; Pearl size.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00357/46798/46665.pdf

Etude physico-chimique de l'estuaire du Belon
Provedor de dados: 5
Autores: Marin, Jean.
The Belon oyster farming centre, despite its economic interest, has, up to now, only been the subject of periodic investigation. In 1923, HINARD took on the study of oyster farm beds in order to compare them with those of another well-known area, Marennes. Later, within the framework of oyster larvae research, VOISIN (1932), TACLET (1935) and HERMAN (1935 to 1938) engaged in a few observations there on temperatures and densities during the months of June and July, the flat oyster's breeding period. In 1946-1947, in brief, MARTEIL started a comparative study of the Aven and the Belon, the results of which were not published. The recurrence of the phenomena of summer mortality rates, since 1961, made it necessary to acquire more knowledge of the estuary. Our...
Tipo: Text
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2375.pdf

The parasitic dinoflagellates Blastodinium spp. inhabiting the gut of marine, planktonic copepods: morphology, ecology, and unrecognized species diversity
Provedor de dados: 5
Autores: Skovgaard, Alf; Karpov, Sergey A.; Guillou, Laure.
Blastodinium is a genus of dinoflagellates that live as parasites in the gut of marine, planktonic copepods in theWorld’s oceans and coastal waters. The taxonomy, phylogeny, and physiology of the genus have only been explored to a limited degree and, based on recent investigations, we hypothesize that the morphological and genetic diversity within this genus may be considerably larger than presently recognized. To address these issues, we obtained 18S rDNA and ITS gene sequences for Blastodinium specimens of different geographical origins, including representatives of the type species. This genetic information was in some cases complemented with new morphological, ultrastructural, physiological, and ecological data. Because most current knowledge about...
Tipo: Text
Palavras-chave: Blastodinium; Copepod; Parasite; Symbiont; Plankton; Uttrastructure; Phylogeny.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00133/24407/22401.pdf

Scale-dependency of the environmental influence on fish β-diversity: Implications for ecoregionalization and conservation
Provedor de dados: 5
Autores: Garcia, Jessica; Pelletier, Dominique; Carpentier, Liliane; Roman, William; Bockel, Thomas.
Aim To determine the ecoregions (spatial marine areas with similar environmental and physical conditions associated with relatively homogeneous fish assemblages) for shallow reef fish assemblages based on predictive models of beta diversity (β‐diversity) that account for both large‐scale environmental factors and local habitat characteristics. We assessed the influence of a spatial scale to rank the importance of these factors. Location New Caledonian (south‐west Pacific Ocean, 17–24° S, 158–172° W) Exclusive Economic Zone, Coral Sea Marine Park. Taxon Fish. Methods Fish and habitat data that were collected at 13 sites around New Caledonia using unbaited rotating underwater video (285 sampling stations) were analysed. Gradient forest modelling was used to...
Tipo: Text
Palavras-chave: Β‐diversity; Ecoregion; Gradient forest; Marine biodiversity; New Caledonia; Scale-dependency; Species turnover; Underwater video.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56668/58629.pdf

On the origins of water masses exported along both sides of Greenland: A Lagrangian model analysis
Provedor de dados: 5
Autores: Lique, Camille; Treguier, Anne-marie; Blanke, Bruno; Grima, Nicolas.
The origin of the water masses exported from the Arctic to the North Atlantic along both sides of Greenland is investigated using an original numerical method. A quantitative Lagrangian analysis is applied to the monthly climatological 3-D output of a global ocean/sea ice high-resolution model. It allows quantification of the different branches of the export to the North Atlantic, as well as related timescales and water mass transformations. In the model, the outflow through Davis Strait consists in equal parts of Pacific and Atlantic water, whilst the export through Fram Strait consists almost fully of Atlantic water (contrary to observations). Pacific water is transferred quickly (O(10 years)) to the North Atlantic through the Beaufort Gyre, where...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00005/11591/8232.pdf

New models for satellite altimeter sea state bias correction developed using global wave model data
Provedor de dados: 5
Autores: Tran, N; Vandemark, D; Chapron, Bertrand; Labroue, S; Feng, H; Beckley, B; Vincent, Patrick.
Sea level determination via satellite altimetry is subject to numerous error sources. One of these is the sea state bias where changing surface wave conditions alter an altimeter's estimate of mean sea level. Recent work suggests that present day methods for correcting this bias, based solely on wave and wind information from the altimeter, may be improved if additional surface gravity wave field measurements become available. This paper tests this hypothesis by developing several new sea state bias correction models using a year long combination of Jason-1 data with wave field statistics generated from an hindcast of the WaveWatch3 ocean wave model. Each candidate model is produced in the same manner; through a nonparametric mapping between Jason-1 sea...
Tipo: Text
Palavras-chave: Ocean wave model; Altimetry; Sea state bias.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1824.pdf

Changes of gill and hemocyte-related bio-indicators during long term maintenance of the vent mussel Bathymodiolus azoricus held in aquaria at atmospheric pressure
Provedor de dados: 5
Autores: Bettencourt, R; Dando, P; Rosa, D; Riou, V; Colaco, A; Sarrazin, Jozee; Sarradin, Pierre-marie; Santos, R.
The deep-sea hydrothermal vent mussel Bathymodiolus azoricus has been the subject of several studies aimed at understanding the physiological adaptations that vent animals have developed in order to cope with the particular physical and chemical conditions of hydrothermal environments. In spite of reports describing successful procedures to maintain vent mussels under laboratory conditions at atmospheric pressure, few studies have described the mussel's physiological state after a long period in aquaria. In the present study, we investigate changes in mucocytes and hemocytes in B. azoricus over the course of several months after deep-sea retrieval. The visualization of granules of mucopolysaccharide or glycoprotein was made possible through their inherent...
Tipo: Text
Palavras-chave: Vent; Hydrothermal vent; Bathymodiolus azoricus; Aquarium acclimatization; Phagocytosis; Alcian blue Periodic Acid Schiff staining; Mucopolysaccharide.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4357.pdf

Bonga shad (   Ethmalosa fimbriata   ) spawning tactics in an upwelling environment
Provedor de dados: 5
Autores: Baldé, Bocar Sabaly; Döring, Julian; Ekau, Werner; Diouf, Malick; Brehmer, Patrice.
Successful recruitment in small pelagic fish populations inhabiting upwelling zones is subject to variation in fecundity and is driven by spatial and temporal fluctuations in environmental conditions, that is, mainly sea surface temperature, salinity and food availability. These fluctuations in abiotic factors have stimulated small pelagic fish populations to exhibit specifically adapted spawning tactics. To better understand to what extent a short‐lived exploited fish species such as bonga shad Ethmalosa fimbriata has adapted to an upwelling environment, we have investigated the interrelationship between upwelling intensity as a proxy for productivity and population fecundity by means of a virtual population analysis. We found that females of intermediate...
Tipo: Text
Palavras-chave: Climate change; Clupeid; Data-poor fisheries; Fecundity; Optimal environmental window; Reproductive adaptation; Small pelagic fish.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00516/62765/67164.pdf

Adaptation to Variable Environments, Resilience to Climate Change: Investigating     Land, Water and Settlement     in Indus Northwest India
Provedor de dados: 5
Autores: Petrie, Cameron A.; Singh, Ravindra N.; Bates, Jennifer; Dixit, Yama; French, Charly A. I.; Hodell, David A.; Jones, Penelope J.; Lancelotti, Carla; Lynam, Frank; Neogi, Sayantani; Pandey, Arun K.; Parikh, Danika; Pawar, Vikas; Redhouse, David I.; Singh, Dheerendra P.
This paper explores the nature and dynamics of adaptation and resilience in the face of a diverse and varied environmental and ecological context using the case study of South Asia’s Indus Civilization (ca. 3000–1300 BC). Most early complex societies developed in regions where the climatic parameters faced by ancient subsistence farmers were varied but rain falls primarily in one season. In contrast, the Indus Civilization developed in a specific environmental context that spanned a very distinct environmental threshold, where winter and summer rainfall systems overlap. There is now evidence to show that this region was directly subject to climate change during the period when the Indus Civilization was at its height (ca. 2500–1900 BC). The Indus...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00369/47977/48002.pdf

Tendances à long terme de la production de la pêche maritime en France - 1986
Provedor de dados: 5
Autores: Meuriot, Eric.
Future prospects of landings are dependent on many political, economic and biological factors. Schematically, a large-scale increase in landings in the coming years seems very unlikely for species whose stocks are currently fully exploited. It must be emphasized that the measures meant to plan the exploitation of the stocks may often be more likely to improve the yields of the boats than to increase the overall catches. The technical difficulties associated with their implementation are the subject of studies at IFREMER. The prospects of reducing the intensity of fishing are dependent upon decisions by the professionals and the authorities; these prospects seem very unlikely in the short term but are conceivable in the mid term. The stock assessments led...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-2496.pdf

Étude des pigments des gonades de pectens australiens
Provedor de dados: 5
Autores: Cruzado, Antonio.
We proposed to study the carotenoid pigments colouring the gonads of frozen Australian scallops.  LEDERER was the first to conduct a study on this subject. He found only one important pigment in the gonads of Pecten maximus: a xanthophyll with three oxygen atoms (C40H54O3±H2) showing absorption maxima at 457 and 487 xx in petroleum ether. He named it "pectenoxanthine". Other pigments, whose quantities vary according to the season, go with the "pectenoxanthine". They have the same absorption spectrum. LEDERER managed to separate up to six different zones by TLC.  More recently, FISHER et al. studied the content of vitamin A and carotenoids of the same Pecten maximus (LINNAEUS). They mostly found xanthophylls as well as a trace of ~-carotene, but no...
Tipo: Text
Ano: 1967
URL: http://archimer.ifremer.fr/doc/1967/publication-3760.pdf

Contribution a l'etude du microplancton des etangs corses de Diana et Urbino et du secteur marin adjacent.
Provedor de dados: 5
Autores: Paulmier, Gerard.
Investigations carried out in both Corsica lagoons Diana and Urbino during the period from January to August 1985, permitted to define the main characteristics of microplankton cycle. Two phytoplanktonic blooms have been observed, first in winter, second less important in July-August. Any correlation cannot be observed between phytoplanktonic cycle or one its main components, and both environmental variables temperature and salinity. However dissolved oxygen ratio may be subject to large summer variations, drifting towards until ecological desequilibrious.
Tipo: Text
Palavras-chave: Algal blooms; Dissolved oxygen; Salinity effects; Temperature effects; Phytoplankton; Plankton.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1800.pdf

Research Priorities to Support Effective Manta and Devil Ray Conservation
Provedor de dados: 5
Autores: Stewart, Joshua D.; Jaine, Fabrice R. A.; Armstrong, Amelia J.; Armstrong, Asia O.; Bennett, Michael B.; Burgess, Katherine B.; Couturier, Lydie I. E.; Croll, Donald A.; Cronin, Melissa R.; Deakos, Mark H.; Dudgeon, Christine L.; Fernando, Daniel; Froman, Niv; Germanov, Elitza S.; Hall, Martin A.; Hinojosa-alvarez, Silvia; Hosegood, Jane E.; Kashiwagi, Tom; Laglbauer, Betty J. L.; Lezama-ochoa, Nerea; Marshall, Andrea D.; Mcgregor, Frazer; Di Sciara, Giuseppe Notarbartolo; Palacios, Marta D.; Peel, Lauren R.; Richardson, Anthony J.; Rubin, Robert D.; Townsend, Kathy A.; Venables, Stephanie K.; Stevens, Guy M. W.
Manta and devil rays are filter-feeding elasmobranchs that are found circumglobally in tropical and subtropical waters. Although relatively understudied for most of the Twentieth century, public awareness and scientific research on these species has increased dramatically in recent years. Much of this attention has been in response to targeted fisheries, international trade in mobulid products, and a growing concern over the fate of exploited populations. Despite progress in mobulid research, major knowledge gaps still exist, hindering the development of effective management and conservation strategies. We assembled 30 leaders and emerging experts in the fields of mobulid biology, ecology, and conservation to identify pressing knowledge gaps that must be...
Tipo: Text
Palavras-chave: Manta; Mobula; Devil ray; Elasmobranch; Management.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59290/62455.pdf

Alterations of the Giant Pyramidal Neurons (Betz Cells) in Brain Cortex of Rat Offspring Born from Gestational Diabetic Dams: A Morphometric Study
Provedor de dados: 77
Autores: Ghafari,Soraya; Golalipour,Elnaz; Golalipour,Mohammad Jafar.
A few studies reported the adverse effects of gestational diabetes on hippocampus and spinal cord of rat offspring. Giant pyramidal neurons are giant pyramidal neurons located in fifth layers of the gray matter in the primary motor cortex. Therefore, this study was conducted to determine the effect of gestational diabetes on the giant pyramidal neurons and the thickness of internal pyramidal layer in the brain cortex of rat offspring. On day 1 of gestation, 10 Wistar rat dams were randomly allocated into two control and diabetic groups. Five animals in diabetic group received 40 mg/kg/BW of Streptozotocin (intraperitoneally) and control animals received normal saline. We randomly selected six offspring of every subject in both groups at day 28, 56 and 84....
Tipo: Journal article
Palavras-chave: Gestational diabetes; Neuron; Giant pyramidal neurons; Cerebral cortex; Rat offspring.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300049

Lumbar and Abdominal Muscles Isometric Potential in Volleyball Cadets
Provedor de dados: 77
Autores: Bogdanovic,Zoran; Smajic,Miroslav; Jaksic,Damjan; Milosevic,Zoran; Obradovic,Borislav; Gogic,Aleksandra; Vidakovic,Hadzi Milos; Ljubisavljevic,Milija; Draskovic,Vesko; Visnjic,Svetlana; Mekic,Hasim; Stankovic,Ratko; Ivancic,Goran; Popovic,Stevo.
Given that a volleyball game requires a certain level of individual anthropological characteristics of young volleyball players to successfully act on situational conditions, and that interdisciplinary approach in the science study is the principal methodological orientation, subject of study in the field of sports is the anthropological status. The aim of this study was to analyze the possible differences in spinal lumbar and abdominal muscles isometric potential of prospective male and female. Sample included 42 subjects (15 male and 27 female subjects), male and female volleyball players, the cadet selection of Serbia, aged 14±0.5 years. Isometric muscle potential assessment was conducted using four standardized motor movement tasks, covering the...
Tipo: Journal article
Palavras-chave: Muscle Strength; Trunk; Volleyball Players.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300047

Carbonated Water and Necro-Apoptotic Cell Death in Chicken Embrio Low Limb
Provedor de dados: 77
Autores: Álvarez,Marco; Perdomo,Lourdes.
Carbonated water is a fundamental part of many drinks and its effects have been studied in many pathological situations. However, cells and tissue damage as a consequence of carbonated water has not been the subject of extensive research. We assessed the short-term effects of soda on in vitro Hanging-drop culture of myoblasts and ex vivo lower limb of 8-day-old chicken embryo skeletal muscle tissue. Several groupswerendesigned: a) Control (Con-tyr), b) Carbonated water (Car), c) Coffe (Caf), and d) Cola beverage (Glu). The samples were observed with light microscopy and digital imaging analysis was performed. The ultra-structure of control and treated tissue were observed with electron microscopy. Immunohistochemistry techniques, such as terminal...
Tipo: Journal article
Palavras-chave: Soda Club; Chicken embryo; Low limb; Apoptosis; Necrosis.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200006

Dose and time dependence of box jellyfish antivenom
Provedor de dados: 80
Autores: Andreosso,Athena; Smout,Michael J; Seymour,Jamie E.
Background The effectiveness of the currently available box jellyfish (Chironex fleckeri) antivenom has been subject of debate for many years. To assess whether the box jellyfish antivenom has the ability to attenuate venom-induced damage at cellular level, the present study analyzed the dose and time dependence of the antivenom in a cell-based assay.Methods Different doses of antivenom were added to venom and subsequently administered to cells and the cell index was measured using xCelligence Technology (ACEA Biosciences). Similarly, antivenom and venom were incubated over different time periods and cell survival measured as stated above. For both experiments, the cell index was plotted as a measure of cell survival against the dose or incubation time and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chironex fleckeri; Antivenom; Venom; Dose–response curve.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200335

Paederus beetles: the agent of human dermatitis
Provedor de dados: 80
Autores: Nasir,Shabab; Akram,Waseem; Khan,Rashad Rasool; Arshad,Muhammad; Nasir,Iram.
Background Rove beetles of the genus Paederus cause dermatitis when they come in contact with human skin. This condition is prevalent in some tropical and subtropical regions, such as in northern Pakistan, where it was recorded for the first time by US troops. Despite much research from other countries on this subject, few studies, mostly clinical, have been performed in a Pakistani context. A survey was carried out in villages, towns and cities of Punjab province, Pakistan, to explore the rove beetle population dynamics and to develop a model to elucidate the symptoms, preventive measures and treatment strategies for this dermatitis. Methods The prospective observational and patient surveys were performed bimonthly over a period of two years, in different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dermatitis linearis; Irritation; Lesions; Paederus; Rove beetle; Skin dermatitis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100314

Presynaptic neuromuscular action of a methanolic extract from the venom of Rhinella schneideri toad
Provedor de dados: 80
Autores: Rostelato-Ferreira,Sandro; Belo,Cháriston A Dal; Leite,Gildo B; Hyslop,Stephen; Rodrigues-Simioni,Léa.
BackgroundRhinella schneideri, previously known as Bufo paracnemis, is a common toad in many regions of Brazil. Its venom exerts important cardiovascular effects on humans and other animals. Although this toad venom has been the subject of intense investigations, little is known about its neuromuscular activity.MethodsThe neurotoxicity of a methanolic extract of R. schneideri venom was tested on mouse phrenic nerve-diaphragm (PND) preparations mounted for conventional twitch tension recording – in response to indirect stimulation – and for electrophysiological measurements.ResultsVenom extract (50 μg/mL) increased the muscle twitch tension in PND preparations but did not significantly alter the resting membrane potential values. Electrophysiological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neurotransmitter release; Ouabain; Presynaptic; Rhinella schneideri; Toad venom.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200332

Perinatal effects of scorpion venoms: maternal and offspring development
Provedor de dados: 80
Autores: Dorce,Ana Leticia Coronado; Martins,Adriana do Nascimento; Dorce,Valquiria Abrão Coronado; Nencioni,Ana Leonor Abrahão.
Abstract Scorpion envenomation is a public health problem, especially in tropical and subtropical countries. Considering the high incidence of scorpionism in some areas, pregnant women and nursing mothers may be possible victims. Scorpion stings alter the release of neurotransmitters and some cytokines. These mediators act as organizers and programmers in the adequate formation of the nerves, and non-physiological concentrations of them during the brain organization originate disorders and diseases that can appear later in the life of the individual. Despite the importance of this subject, there are only a few studies showing the effects of scorpion venom on maternal reproductive development, in the morphology and physical and behavioral development of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scorpion venoms; Pregnancy; Lactation; Reproductive development; Perinatal development.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100210

Dairy Manure Nitrogen Availability in Eroded and Noneroded Soil for Sugarbeet Followed by Small Grains
Provedor de dados: 18
Autores: Lentz, R.D.; Lehrsch, G.A.; Brown, Bradford; Johnson-Maynard, J.; Leytem, A.B.
Efficient recycling of abundant manure resources from regional dairy industries in the semiarid West requires a better understanding of N availability in manure-amended soils. We measured net N mineralization using buried bags, and crop biomass, N uptake, and yields for sprinkler-irrigated, whole (noneroded) and eroded Portneuf soils (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) subject to a one-time manure application. Treatments included a control, fertilizer, two rates of composted dairy manure (28.4, 64.3 Mg ha–1, dry wt.), and two rates of stockpiled dairy manure (23.3, 45.7 Mg ha–1, dry wt.) applied in the fall before the Year 1 cropping season. Plots were planted to sugarbeet (Beta vulgaris L.), winter wheat (Triticum...
Tipo: Article
Palavras-chave: Manure; Amendments; Nitrogen.
Ano: 2011
URL: http://eprints.nwisrl.ars.usda.gov/1420/1/1390.pdf

From botanical biography towards animal iconology
Provedor de dados: 16
Autores: Verdoorn, Frans.
This essay is mainly a restatement of the biohistorical ideology such as we developed it during recent years. At a recent international congress, I tried to present this in a detached, logical way (1965). At other times, I endeavoured to clarify it by using a case history (1964). In both cases, certain things remained unexplained and I will now try to elucidate the development of our biohistorical ideology along somewhat different lines. In doing so I shall avoid unnecessary personal reminiscences, but some facts of a personal nature or relating to the development of our Institute necessarily will have to be recapitulated in this connection. Many factors are involved, ranging from the increase in our staff, to the augmenting interests of our students...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/535071

The Prosea Programme (Plant Resources of South-East Asia)
Provedor de dados: 16
Autores: Jansen, P.C.M.
The Third PROSEA International Workshop was held in Bogor, Indonesia, 15-17 November 1999 and was attended by about 80 participants from 12 countries. A keynote address was presented by Prof. Dr. Y. Koswara on behalf of His Excellency, the Minister of National Education of the Republic of Indonesia. The main subject of the Workshop was ‘PROSEA beyond 2000’ and numerous recommendations were presented after preceding discussions by 4 working groups. The overall PROSEA Vision and Mission Statement was presented as follows: “In view of the importance of plant information for mankind and biodiversity conservation, and the unique position of PROSEA in this respect, PROSEA strives to be a leading information provider and disseminator on the plant resources of...
Tipo: Article / Letter to the editor
Ano: 2001
URL: http://www.repository.naturalis.nl/record/532837

Review
Provedor de dados: 16
Autores: Baas, P.
With over 80 original publications on foliar sclereids, published in the last 30 years, Dr. T. Ananda Rao is a well qualified author for a compendium on the subject. The book consists of a general and a special part. The former includes a historical and methodological introduction, a major chapter on the morphological classification of the various types of sclereids and tracheoids and their distribution patterns, and sections on their taxonomic significance as well as their ontogeny and (presumed) functions. The special part is an ‘abstract review’ of literature records and original observations on 121 families of angiosperms, arranged according to the Takhtajan system. The book is richly illustrated with line drawings as well as numerous halftone plates....
Tipo: Article / Letter to the editor
Ano: 1993
URL: http://www.repository.naturalis.nl/record/525546

On the position of Platycarpum Humb. et Bonpl., Henriquezia Spruce ex Bth. and Gleasonia Standl
Provedor de dados: 16
Autores: Bremekamp, C.E.B.
Some time ago the “Institute Agronómico do Norte, Belem, Pará, Brazil” sent me a set of specimens for identification among which I detected a new species of Henriquezia Spruce ex Bth. This discovery induced me to study once more and now in somewhat more detail the relation between this genus and the nearly related Platycarpum Humb. et Bonpl. and the position these two genera occupy with regard to the habitually rather similar Gleasonia Standl., a subject to which I had already paid some attention at an earlier occasion, and on which I had reported in a note which is to be found at the base of p. 16 of my work on “the African Species of Oldenlandia L sensu Hiern et K. Schumann” in Verh. Kon. Ned. Akad. v. Wetensch., Sect. 2, 48, no 4, 1952. By the good...
Tipo: Article / Letter to the editor
Ano: 1957
URL: http://www.repository.naturalis.nl/record/535119

Dedication
Provedor de dados: 16
Autores: Holttum, R.E.
CARL FREDRICK ALBERT CHRISTENSEN (1872-1942) was the founder of modern fern taxonomy. To appreciate the scope of his work, it is necessary to understand the confusions of thought on the subject which persisted through the 19th century and were still evident in the summary prepared (by DIELS) for ENGLER &amp; PRANTL’S Pflanzenfamilien in 1899. CHRISTENSEN’S first great work was his Index Filicum (1905-6) in which he listed all known fern binomials and also relegated many to synonymy. In the main he adopted the classification and nomenclature of DIELS. While preparing the Index he came to realize that many generic concepts accepted in the Index were unnatural or confused. This was especially evident in the great complex of species which he listed under the...
Tipo: Article / Letter to the editor
Ano: 1959
URL: http://www.repository.naturalis.nl/record/532714

Once more the generic name Passerina Vieillot
Provedor de dados: 16
Autores: Oort, E.D. van.
The note on the generic name of the Snow-bunting by Dr. E. Hartert in this part of our periodical gives me cause to revert to the subject of my note on the generic name Passerina Vieillot and to state here, that I stand to what I have said about the rejection of this name in Zoology (Notes Leyden Mus. XXXII, n°. 1, p. 32). Dr. Hartert says, that all modern codes of nomenclature in Zoology have agreed not to consider botanical nomenclature. This may be so, but I ask here, are Zoologists and especially Ornithologists agreeing in nomenclature? The answer is in the negative. When studying papers on systematic Ornithology by different authors we learn that they agree but very little in naming the forms. Each author seems to have his own views and seems to...
Tipo: Article / Letter to the editor
Ano: 1910
URL: http://www.repository.naturalis.nl/record/509365

Endophytic and pathogenic Phyllosticta species, with reference to those associated with Citrus Black Spot
Provedor de dados: 16
Autores: Glienke, C.; Pereira, O.L.; Stringari, D.; Fabris, J.; Kava-Cordeiro, V.; Galli-Terasawa, L.; Cunnington, J.; Shivas, R.G.; Groenewald, J.Z.; Crous, P.W.
We investigated the identity and genetic diversity of more than 100 isolates belonging to Phyllosticta (teleomorph Guignardia), with particular emphasis on Phyllosticta citricarpa and Guignardia mangiferae s.l. occurring on Citrus. Phyllosticta citricarpa is the causal agent of Citrus Black Spot and is subject to phytosanitary legislation in the EU. This species is frequently confused with a taxon generally referred to as G. mangiferae, the presumed teleomorph of P. capitalensis, which is a non-pathogenic endophyte, commonly isolated from citrus leaves and fruits and a wide range of other hosts. DNA sequence analysis of the nrDNA internal transcribed spacer region (ITS1, 5.8S nrDNA, ITS2) and partial translation elongation factor 1-alpha (TEF1), actin and...
Tipo: Article / Letter to the editor
Palavras-chave: Guignardia endophyllicola; Guignardia mangiferae; Phyllosticta bifrenariae; Phyllosticta brazilianiae; Phyllosticta capitalensis; Phyllosticta citriasiana; Phyllosticta citribraziliensis; Phyllosticta citricarpa; Taxonomy.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/532033

On a posttertiary fauna from the Stream- Tin-Deposits of Blitong (Biliton)
Provedor de dados: 16
Autores: Martin, K.
Mr. C. de Groot has lately presented to the Museum a collection of beautifully preserved shells etc., which he has brought together among the stream-tin-deposits of Blitong, in the district of Tandjoeng Pandang, mine N°. 8, Djitjong. Mr. de Groot tells me that these deposits are occasionally regarded as tertiary, and he requested me to give a more exact determination of their age, with the aid of the material collected by himself. I was soon convinced, that the fauna in question belongs to a very recent past, and for this reason it may be more interesting for zoologists than for palaeontologists. In the first place there can be no doubt, that species occuring in posttertiary strata must belong, when representatives of the same species are still living, to...
Tipo: Article / Letter to the editor
Ano: 1881
URL: http://www.repository.naturalis.nl/record/509328

Dr C. Beets (1916-1995) and the 'Rijksmuseum van Geologie en Mineralogie'
Provedor de dados: 16
Autores: Winkler Prins, C.F.
Dr Cornelis Beets, internationally renowned specialist of Indonesian Cainozoic molluscs, died on the 28th of July 1995. Born April 25, 1916, he read geology at Leiden University and obtained his PhD in 1941 on a geological study of the Turin Hills (Italy). When working on his PhD, he had already started studying the large collections of Cainozoic molluscs brought together by Professor K. Martin, the first director of the National Museum of Geology and Mineralogy at Leiden and his preceptor as far as the molluscs were concerned. He used the wartime years to study the Plio-Pleistocene molluscs from The Netherlands, whilst employed by the Dutch National Coalmines. After World War II he started to work for the Royal Dutch/Shell Group, which brought him to many...
Tipo: Article / Letter to the editor
Palavras-chave: 38.04.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/317452

The Genera of Indo-Malayan and Papuan Tortricidae
Provedor de dados: 16
Autores: Diakonoff, A.
1 Introduction . . . . . . . . . . 111 2 Definition of the region and remarks on distribution . . . . . . . . . . 116 3 Key to the families of Tortricina . . . . . . . . . . 118 4 The family Tortricidae: general description, genital apparatus, early stages, systematic position . . . . . . . . . . 118 5 Key to the genera . . . . . . . . . . 125 6 Description of the genera and of the genital characters of their genotypes, with notes on new synonyms of the species . . . . . . . . . . 128 7 Glossary . . . . . . . . . . 236 8 Literature . . . . . . . . . . 237 9 Table of distribution of the genera between . . . . . . . . . . 238 &amp; 239 10 Index . . . . . . . . . . 239 I. INTRODUCTION "The discrimination of genera in the Tortricina has always been admittedly...
Tipo: Article / Letter to the editor
Palavras-chave: 42.75.
Ano: 1939
URL: http://www.repository.naturalis.nl/record/319279

Descriptions of three new species of the genus Physodera (Carabidae)
Provedor de dados: 16
Autores: Neervoort van de Poll, J.R.H.
The genus Physodera has been established already in 1829 by Eschscholtz for a species (P. Dejeani Esch.) with very singular inflated sides of the thorax. Twenty years afterwards Major Parry added a second species P. Eschscholtzi Parry) to the genus, which entirely wants that peculiarity, however, in all other respects agreeing perfectly well with the type of the genus. Both species have been originally described from the Philippine-Islands, but Major Parry made already mention that he himself possessed a specimen of P. Eschscholtzi from Ceylon. Subsequent explorations have shown that they are both very widely distributed. Schmidt Göbel in his Faunula coleopterorum Birmaniae” records P. Dejeani Esch. from Tenasserim and Dr. Hagen sent over to the Leyden...
Tipo: Article / Letter to the editor
Ano: 1889
URL: http://www.repository.naturalis.nl/record/508519

Bauxite deposits in Suriname and Demerara (British Guiana)
Provedor de dados: 16
Autores: Kersen, J.F. van.
On the basis of the morphology and stratigraphic positions, the bauxite deposits in Suriname and Demerara (British Guiana) were divided into four main groups, namely: 1. Plateau type bauxite, 2. High-level type bauxite, 3. Medium-level type bauxite, 4. Low-level type bauxite. The age of these deposits is as follows: Plateau type bauxite .................................... Pre-Tertiary Low-level type bauxite ................................ Middle- to Lower-Tertiary High-level and Medium-level type bauxite .... Pleistocene These three main periods of bauxitization have led to the formation of fossil bauxite. After these main periods the bauxitization process, however, has not come to a standstill. It continues even at the present time, although less...
Tipo: Article / Letter to the editor
Ano: 1956
URL: http://www.repository.naturalis.nl/record/505593

August A. Pulle. 1878-1955
Provedor de dados: 16
Autores: Lanjouw, J.
On the 28th of February 1955 Prof. Dr A. A. Pulle died at Utrecht after a long and painful illness. August Adriaan Pulle was born on the 10th of January 1878 at Arnhem, where he also attended the primary and the secundary school. During the later years at the high school his interest in plants was awakened, and by numerous excursions in the neighbourhood, which is well-known for its varied vegetation, he obtained a good knowledge of the Dutch flora. However, he was at that time even more attracted by chemistry, and when he had finished the high school he thought that a university study of pharmacy would best suit his leanings. As the certificate of the type of high school he had attended gave at that time no access to the university, he had to qualify for...
Tipo: Article / Letter to the editor
Ano: 1955
URL: http://www.repository.naturalis.nl/record/534966

Carcinization in the Anomura – fact or fiction? II. Evidence from larval, megalopal and early juvenile morphology
Provedor de dados: 16
Autores: McLaughlin, Patsy A.; Lemaitre, Rafael; Tudge, Christopher C.
In this second of a two-part series, carcinization in the Anomura has been reviewed from early juvenile, megalopal, and larval perspectives. Data from megalopal and early juvenile development in ten genera of the Lithodidae have provided unequivocal evidence that earlier hypotheses regarding evolution of the king crab pleon were erroneous. A pattern of sundering, and decalcification has been traced from the megalopal stage through several early crabs stages in species of Lithodes and Paralomis, with supplemental evidence from species in eight other genera. Of major significance has been the attention directed to the marginal plates of the second pleomere, which when separated in lithodids are not homologous with the adult so-called “marginal plates” of the...
Tipo: Article / Letter to the editor
Palavras-chave: Carcinization; Anomura; Paguroidea; Lithodidae; Paguridae; Lomisidae; Porcellanidae; Larval; Megalopal and early juvenile morphology; Pleonal tergites.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/534278

Monograph of Arctium L. (Asteraceae). Generic delimitation (including Cousinia Cass, p.p.), revision of the species, pollen morphology, and hybrids
Provedor de dados: 16
Autores: Duistermaat, Helena.
The subject of this thesis is a monograph of the genus Arctium, now including also five species formerly placed into Cousinia. Based on herbarium material and some field observations, this study presents new insights on three subjects: a) the generic delimitation of Arctium, b) the species delimitation within the A. minus-complex, and c) the occurrence of hybridisation. It soon became clear, rather surprisingly, that five species of Cousinia possess hooked involucral bracts like Arctium in its classical concept. The study became focussed then on the relation between Arctium in its classical delimitation and the large Asian genus Cousinia. From a macromorphological point of view the five ‘arctioid’ species of Cousinia should be placed in the extended genus...
Tipo: Article / Letter to the editor
Ano: 1996
URL: http://www.repository.naturalis.nl/record/528199

Contributions of the Ruksherbarium towards the plant-geography of Malesia and the Pacific
Provedor de dados: 16
Autores: Balgooy, M.M.J. van.
The first substantial contribution of the Rijksherbarium towards the plant geography of Malesia and the Pacific was made by the German born J. G. Hallier in his paper ‘Über frühere Landbrücken, Pflanzen- und Völkerwanderungen zwischen Australien und Amerika’. In this paper he suggested that recent land connections had existed in the tropical Pacific from Japan over Hawaii to California and south to Peru and another connection in the south Pacific. His arguments besides botanical were also ethnographical and linguistic. H.J. Lam was not only responsible for the promotion of taxonomic research. He added chapters on phytogeography to his revisions of the Sapotaceae and Burseraceae. His papers on the subject always had a philosophical quality. He once compared...
Tipo: Article / Letter to the editor
Ano: 1979
URL: http://www.repository.naturalis.nl/record/525460

The geographical variation of the Jay (Garrulus glandarius) in Europe: a study on individual and clinal variation
Provedor de dados: 16
Autores: Voous, K.H.
Ever since it became apparent that terrestrial animals ranging over large continental areas generally showed a certain degree of gradual geographic variation, attention has been focused on the colour variation of the Jay, Garrulus glandarius, in Europe. Surely the Jays belong to those species of palearctic land birds in which the formation of geographical differences must be considered to be exceptionally favoured: HARTERT (1903—1922; including HARTERT &amp; STEINBACHER 1932) recognized as many as 10 European races of the Jay by name, whereas Kleiner (1935—38) in his monographic treatment of the species numbered as many as 9 races in the same region. In several instances of the geographic variation of the Jay the differences are exceedingly striking, e.g....
Tipo: Article / Letter to the editor
Ano: 1953
URL: http://www.repository.naturalis.nl/record/505158

Stephani’s use of the “Sprucean” subgeneric names in Lejeunea, 1888-1893
Provedor de dados: 16
Autores: Zijlstra, Gea.
Gradstein et al. (1982) propose to conserve four generic names of Lejeuneaceae: Lopholejeunea (Spruce) Schiffn., Acrolejeunea (Spruce) Schiffn., Trachylejeunea (Spruce) Schiffn. and Taxilejeunea (Spruce) Schiffn., each of which was introduced as a subgeneric name in Lejeunea by Spruce (1884), and subsequently raised to generic rank by Schiffner in his treatment of the Hepaticae in Engler-Prantl (preprint 1893) [see proposals to conserve 675-678 see p. 746]. Although Spruce (l.c.) used for his Lejeunea species a binary nomenclature by combining subgeneric names with specific epithets, it is clear (e.g. text, index) that the binomina are meant as Lejeunea combinations and they are considered as such by most authors (see Gradstein et al. for further details)....
Tipo: Article / Letter to the editor
Ano: 1982
URL: http://www.repository.naturalis.nl/record/534805

Zoogeography of primates in insular Southeast Asia: species-area relationships and the effects of taxonomy
Provedor de dados: 16
Autores: Nijman, V.; Meijaard, E.
Given its complex zoogeography and large number of islands insular Southeast Asia makes an excellent subject for studying the interrelationships of species richness, island area and isolation. The islands are merely highpoints of an immense shallow continental shelf which during Pleistocene glacial periods was exposed periodically as dry land connecting the now isolated islands with one another. The area is home to a large number of primate taxa, including many endemic to the region (Nasalis, Presbytis, Pongo, Symphalangus, Simias, Tarsius). Worldwide, the number of described (extant) species of primates has doubled in the last two decades partially as a result of applying a different species concept (viz. Phylogenetic Species Concept PSC as opposed to the...
Tipo: Article / Letter to the editor
Palavras-chave: Endemism; Extinction; Island biogeography; Phylogeny; Species concepts; Sunda Shelf; 42.84.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/280480

Ontology-based Assisted Curation of Biomedical Data
Provedor de dados: 17
Autores: Conrad Plake.
Manual curation of biomedical data is highly accurate but time consuming, and does not scale with the ever increasing growth of biomedical literature. Text mining as a high-throughput computational technique scales well but requires human expertise to produce highly accurate results. Ontologies can help organizing large quantities of unstructured information. Here we present three systems, namely GoGene, GoPubMed and GoWeb, employing biomedical ontologies and show how they can assist manual curation of biomedical data.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;GoGene associates all genes from different model organisms to concepts of the Gene Ontology (GO) and the Medical Subject Headings (MeSH). The hierarchical structures of both terminologies support clustering...
Tipo: Presentation
Palavras-chave: Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/3122/version/1

Bioinformatic approaches for the genetic and phenotypic characterization of a Saccharomyces cerevisiae wine yeast collection
Provedor de dados: 17
Autores: Ricardo Franco-Duarte; Lan Umek; Blaz Zupan; Dorit Schuller.
The objective of the present study was to compare genetic and phenotypic variation of 103 Saccharomyces cerevisiae strains isolated from winemaking environments. We used bioinformatics approaches to identify genetically similary strains with specific phenotypes and to estimate a strain&amp;#x27;s biotechnological potential.  &amp;#xd;&amp;#xa;A S. cerevisiae collection, comprising 440 strains that were obtained from winemaking environments in Portugal has been constituted during the last years. All strains were genetically characterized by a set of eleven highly polymorphic microsatellites and showed unique allelic combinations. Using neural networks, a subset of 103 genetically most diverse strains was chosen for phenotypic analysis, that included growth...
Tipo: Poster
Palavras-chave: Bioinformatics.
Ano: 2008
URL: http://precedings.nature.com/documents/2288/version/1

Plasma amino acid profile is altered by visceral fat accumulation and is a predictor of visceral obesity in humans
Provedor de dados: 17
Autores: Takayuki Tanaka; Yuko Ishizaka; Toru Mitushima; Mizuki Tani; Akiko Toda; Eiichi Toda; Minoru Okada; Hiroshi Yamamoto; Minoru Yamakado.
Background: The plasma amino acid profile can be a useful indicator in clinical settings because it changes in response to various metabolic alternations. However, the association between the plasma amino acid profile and body fat accumulation has not been evaluated in humans.Objective: This study aimed to relate plasma amino acids to visceral fat accumulation in humans because excess visceral fat raises the odds ratio of developing metabolic syndrome.Design: A total of 1,449 subjects (985 males and 464 females) who had undergone a comprehensive health screening were enrolled in this study. The visceral fat area (VFA) was determined in each subject using CT imaging. Subjects were then divided into two groups according to VFA: high-VFA (&amp;#x2265;100 cm2,...
Tipo: Manuscript
Palavras-chave: Bioinformatics.
Ano: 2011
URL: http://precedings.nature.com/documents/5560/version/1

Visual consciousness tracked with direct intracranial recording from early visual cortex in humans
Provedor de dados: 17
Autores: Naotsugu Tsuchiya; Jeffrey Chung; Dawn Eliashiv; Ralph Adolphs; Adam Mamelak.
A fundamental question in cognitive neuroscience is how neuronal representations are related to conscious experience.&amp;#xd;&amp;#xa;Two key questions are: where in the brain such representations are located, and at what point in time they correlate with conscious experience. In line with this issue, a hotly debated question is whether primary visual cortex (V1) contributes to visual consciousness, or whether this depends only on higher-order cortices. Here we investigated this issue by recording directly from early visual cortex in two neurosurgical patients undergoing epilepsy monitoring with intracranial electrocorticogram (ECoG) electrodes that covered early visual cortices, including the dorsal and ventral banks of the calcarine sulcus. We used...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/6040/version/1

Interactions between short-term and long-term plasticity: shooting for a moving target
Provedor de dados: 17
Autores: Jean-Pascal Pfister; M&amp;#xe1;t&amp;#xe9; Lengyel.
Far from being static transmission units, synapses are highly dynamical elements that change over multiple time scales depending on the history of the neural activity of both the pre- and postsynaptic neuron. Moreover, synaptic changes on different time scales interact: long-term plasticity (LTP) can modify the properties of short-term plasticity (STP) in the same synapse. Most existing theories of synaptic plasticity focus on only one of these time scales (either STP or LTP or late-LTP) and the theoretical principles underlying their interactions are thus largely unknown. Here we develop a normative model of synaptic plasticity that combines both STP and LTP and predicts specific patterns for their interactions. Recently, it has been proposed that STP...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/5857/version/1

Bringing Text Miners and Biologists Closer Together
Provedor de dados: 17
Autores: An&amp;#xe1;lia Louren&amp;#xe7;o; S&amp;#xf3;nia Carneiro; Rafael Carreira; Miguel Rocha; Isabel Rocha; Eug&amp;#xe9;nio C. Ferreira.
The boosting of Biomedical Text Mining (BioTM) research in the last few years has led the way for finally bridging out the gap between text miners and biologists. Beyond the development of enhanced entity recognisers and the construction of relationship extraction systems, now, more than ever, it is the time for applying available tools to real-world scenarios. Moreover, it is crucial to develop end-user tools that can assist biologists in their research activities. Such tools should be able to emulate biologist conventional curation, recurring to the same knowledge bases and making the same assumptions that biologists usually do, whereas delivering automated capabilities. The search and selection of PubMed articles, the construction of dictionaries from...
Tipo: Presentation
Palavras-chave: Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/3188/version/1

Coupling perception and action using probabilistic control
Provedor de dados: 17
Autores: Constantin A. Rothkopf; Paul Schrater.
Although there is a long tradition of separating perception, decision making and action, the theoretical conditions for such a separation are very restrictive and not applicable even to the most basic every day tasks in humans. Instead, all uncertainties relating states of the world to observations, actions to future states and rewards, and actions to observations need to be considered in order to act optimally. In the most general formulation this can be formalized as a partially observable Markov decision process (POMDP).&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;We consider the task of intercepting a moving ball for which a multitude of previous studies has shown that humans use a constant bearing angle strategy. Here we manipulated the observation function in...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2011
URL: http://precedings.nature.com/documents/6566/version/1

Structure Prediction and Functional Characterization of ERG Proteins Involved in Ergosterol Biosynthetic Pathway of Candida albicans
Provedor de dados: 17
Autores: Sudeep  Roy; Suaib  Luqman; Ashok  Sharma.
The ERG proteins and enzymes of the ergosterol biosynthetic pathway has been the subject of intensive investigation as a target for several classes of antifungal agents used to treat C. albicans infection. Over the past few decades, a number of drugs and inhibitors with wide spectrum of activity, low toxicity and defined targets have been introduced. Several lines of evidence suggest that allylamines targets squalene epoxidase (ERG1), morpholines affects sterol C8-C7 isomerase (ERG2) and sterol reductase (ERG24), azoles inhibits a cytochrome P450 (ERG11) responsible for the 14 &amp;#x3b1;-demethylation of lanosterol and C-5 sterol desaturase (ERG3) and polyenes binds to ergosterol that leads to the damage of cell plasma membrane, ensuing in leakage of...
Tipo: Poster
Palavras-chave: Microbiology; Molecular Cell Biology; Pharmacology; Bioinformatics.
Ano: 2011
URL: http://precedings.nature.com/documents/6709/version/1

The Role of the Gut Microbiota in Ulcerative Colitis
Provedor de dados: 17
Autores: Vincent B. Young; Eugene B. Chang; Folker Meyer; Mitchell L. Sogin; Thomas M. Schmidt; James Tiedje.
The overall goal of our Demonstration Project is to address the hypothesis that the gut microbiota plays a critical role in the pathogenesis of inflammatory bowel disease (IBD). To circumvent the confounding effects of mucosal inflammation and medications that independently bias microbial selection, we have set out to study a unique clinical model of ulcerative colitis (pouchitis) where the development and status of the gut microbiota can be assessed prospectively and relative to the outcome of disease. Pouchitis is an inflammatory condition of a surgically-created pseudorectum that is unique to ulcerative colitis and rarely occurs when this procedure is performed for treatment of other non-IBD diseases.  Since the incidence of developing pouchitis within...
Tipo: Marker Paper / Data Plan
Palavras-chave: Ecology; Genetics &amp; Genomics; Microbiology; Bioinformatics; Data Standards.
Ano: 2010
URL: http://precedings.nature.com/documents/5254/version/1

Examining the uses of shared data
Provedor de dados: 17
Autores: Heather A. Piwowar; Douglas B. Fridsma.
Background&amp;#xd;&amp;#xa;    Many initiatives and repositories exist to encourage the sharing of research data, and thousands of microarray gene expression datasets are publicly available. Many studies reuse this data, but it is not well understood which datasets are reused and for what purpose.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;    Materials and Methods&amp;#xd;&amp;#xa;    We trained a machine-learning algorithm to automatically classify full-text gene expression microarray studies into two classes: those that generated original microarray data (n=900) and those which only reused data (n=250). We then compared the Medical Subject Heading (MeSH) terms of two classes to identify MeSH topics which were over- or under-represented by publications with...
Tipo: Poster
Palavras-chave: Bioinformatics.
Ano: 2007
URL: http://precedings.nature.com/documents/425/version/2

Examining the uses of shared data
Provedor de dados: 17
Autores: Heather A. Piwowar; Douglas B. Fridsma.
Background&amp;#xd;&amp;#xa;    Many initiatives and repositories exist to encourage the sharing of research data, and thousands of microarray gene expression datasets are publicly available. Many studies reuse this data, but it is not well understood which datasets are reused and for what purpose.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;    Materials and Methods&amp;#xd;&amp;#xa;    We trained a machine-learning algorithm to automatically classify full-text gene expression microarray studies into two classes: those that generated original microarray data (n=900) and those which only reused data (n=250). We then compared the Medical Subject Heading (MeSH) terms of two classes to identify MeSH topics which were over- or under-represented by publications with...
Tipo: Poster
Palavras-chave: Bioinformatics.
Ano: 2007
URL: http://precedings.nature.com/documents/425/version/1

Ghost hand: My hand is not mine
Provedor de dados: 17
Autores: Yuta Nishiyama; Shinpei Tatsumi; Shusaku Nomura; Yukio Gunji.
Synchronous visuo-tactile stimulation of the type in the rubber hand illusion (RHI)^1-3^ and in out of body experience (OBE)^4,5^ can induce the brain to incorporate external objects or images into a part or whole of body image. Whether in the context of RHI or OBE, since the participant passively receives visuo-tactile stimulations, body image appears only with the sense of ownership (SoO), not with the sense of agency (the registration that we are the initiators of our actions; SoA)^6,7^. Insofar as self-consciousness as a body image is a unity acting in its environments, body image has to be investigated in the relationship between SoO and SoA^8,9^. It requires an experimental condition in which SoO and SoA can be independently separated in an active...
Tipo: Manuscript
Palavras-chave: Neuroscience.
Ano: 2009
URL: http://precedings.nature.com/documents/3019/version/1

IODE Group of Experts on Biological and Chemical Data Management and Exchange Practices (GE-BICH), Fourth Session
Provedor de dados: 20
The fourth session of the IODE Group of Experts on Biological and Chemical Data Management and Exchange Practices was held at the IOC Project Office for IODE from 27 – 30 January 2009. The session was attended by 14 participants, including members of the Group and invited experts representing other IODE activities (MarineXML, OceanDataPortal, OceanDataStandards), CDIAC Ocean Carbon, ICES, FAO, ICSU’s WDCs, SeaDataNet, EUR-OCEANS, OBIS and WoRMS. The Group reviewed the implementation of the work plan for the previous inter-sessional period, and approved a plan for the period 2009 – 2011 focussing on three key areas: (i) Controlled vocabularies; (ii) Quality Assurance/Quality Control (QA/QC) of biological and chemical data; and (iii) Data reporting and...
Tipo: Report
Ano: 2009
URL: http://hdl.handle.net/1834/3039

Report of the second horse mackerel otolith reading workshop
Provedor de dados: 20
Age estimation of commercially exploited fish species in the Benguella region. Stocks of the two species of horse mackerel that occur in the Benguela region, namely Cape (Trachurus trachurus capensis) and Cunene horse mackerel (Trachurus trecae) are being exposed to increasing levels of commercial exploitation, highlighting the requirement for effective management measures to ensure their sustainable utilization. Such measures can only be implemented with confidence if they are based on reliable stock assessment procedures. Sizestructured stock assessment models have been found to be unsuitable for Southern African horse mackerel stocks, and the decision has recently been made to move to an age-structured VPA approach. A fundamental requirement for this...
Tipo: Report
Palavras-chave: Aging; Aging; Http://aims.fao.org/aos/agrovoc/c_192.
Ano: 2001
URL: http://hdl.handle.net/1834/2758

Obtención de una fracción antimitótica del extracto etanólico de la macroalga Digenia simplex
Provedor de dados: 20
Autores: Valle-Zapata, H.; Ospina-Guerrero, S.; Galeano-Jaramillo, E.; Martínez-Martínez, A.; Márquez-Fernández, M.; López-Ortíz, J.
Las algas marinas han sido ampliamente estudiadas por investigadores del área de los productos naturales con el fin de encontrar agentes antitumorales y desarrollar nuevos agentes terapéuticos contra el cáncer. Los extractos crudos del alga roja marina Digenia simplex presentan un potente efecto antimitótico en líneas celulares cancerosas, por lo tanto es de suma importancia determinar las sustancias responsables de esta actividad. Para lograr este objetivo, se realizó un fraccionamiento cromatográfico del extracto etanólico de Digenia simplex guiado por evaluaciones de actividad antimitótica sobre la línea Jurkat (linfoma mieloide humano). Adicionalmente, se efectuó un ensayo de citotoxicidad de la fracción más activa obtenida. Para el fraccionamiento del...
Tipo: Journal Contribution
Ano: 2009
URL: http://hdl.handle.net/1834/3612

Data Formats and Data Unification
Provedor de dados: 20
Autores: Mikhailov, N.; Viazilov, E.
Data formatting is an important component of  data Management technologies, which  provides the structural basis for data  sets ‘  creation as well as for software  interfaces between data sets and procedures  of data processing,  analysis, visualization and dissemination.  Data formatting is of  particular importance for  data  exchange  between subject - oriented technologies, between  data  centres, between  a data  centre and  users. For a long time the Group of Experts on Technical Aspects of Data Exchange (IODE GETADE) has been  responsible for providing the standardization of ocean data exchange. These activities resulted in development of the General Format (GF3) formatting system and, the GF3 subsets for various disciplines (oceanography,...
Tipo: Report
Palavras-chave: Oceanographic data; Data; Http://aims.fao.org/aos/agrovoc/c_49816.
Ano: 2000
URL: http://hdl.handle.net/1834/1692

The cycle of activity in the accessory nidamental glands from cephalopods
Provedor de dados: 27
Autores: Richard, A.; Van den Branden, C.; Decleir, W.
The reproductive system of female cephalopods includes a glandular system (oviduct glands and nidamental glands), which develops considerably during sexual maturation and which plays an important part in the formation of the different egg membranes. It is generally uncoloured. An exception are the nidamental glands in &lt;i&gt;Nautilus pompilius&lt;/i&gt; which are composed of opaque yellowish or yellowish-green tissue (Ref. 1). Moreover all Sepioidea and Myopsida and &lt;i&gt;Ctenopteryx&lt;/i&gt;, a species belonging to the Oegopsida (Ref.2) possess accessory nidamental glands. The most striking property of these glands is their intense coloration varying from yellow to orange and red.  This paper is a comparative study of the accessory nidamental glands...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endocrine systems; Glands; Cephalopoda.
Ano: 1979
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3609

Particulate barium stocks and oxygen consumption in the Southern Ocean mesopelagic water column during spring and early summer
Provedor de dados: 27
Autores: Dehairs, F.A.; Shopova, D.; Ober, S.; Veth, C.; Goeyens, L.
Particulate barium was analysed in the upper 600 m of the Southern Ocean water column during repeated transects along the 6 degree W meridian in October-November 1992. The transects extended between the northern edge of the Weddell Gyre (57 degree 30'S) in the south to 47 degree S within the Polar Front Zone (PFZ) in the north. From earlier studies, it is known that the largest fraction of Ba in oceanic suspended matter occurs as barite micro-crystals. In the PFZ, an increase in the particulate Ba content in surface waters and at mesopelagic depths can be significant over the investigation period (1 month) and follows the increase of primary production during bloom development. Using an inverse one-dimensional advection-diffusion-consumption model,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Barium Biogeochemical cycle Carbon cycle Mixed layer Oxygen consumption Primary production PSW; Antarctic Ocean.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=10209

A 4-years' analysis of the meiofauna community of a dumping site for TiO&lt;sub&gt;2&lt;/sub&gt;-waste off the Dutch coast
Provedor de dados: 27
Autores: Smol, N.; Huys, R.; Vincx, M.
Sublittoral meiofauna of 24 stations was monitored over 4 years (1984-1987) in and around a dumping site for TiO&lt;sup&gt;2-&lt;/sup&gt; acid waste in the Southern Bight of the North Sea off the Dutch coast. The meiofauna was examined quantitatively and qualitatively with special reference to the nematode and the copepod community structure down to species level and to the trophic structure of the nematodes. Biological, sedimentological, geographical parameters and the concentration of several heavy metals were subject to multivariate statistical analysis and classification techniques to evaluate the impact of the TiO&lt;sup&gt;2-&lt;/sup&gt; dumping activities. The meiofauna is dominated by nematodes, copepods, gastrotrichs and turbellarians. There is a...
Tipo: Info:eu-repo/semantics/article
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2890

Proposal for a short-term toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii
Provedor de dados: 27
Autores: Vanhaecke, P.; Persoone, G.; Claus, C.; Sorgeloos, P.
Although standardization of toxicity tests on aquatic organisms is an urgent necessity, very little has yet been achieved for the marine environment. As a first step in this direction, a simple, inexpensive and reliable short-term routine test with &lt;i&gt;Artemia&lt;/i&gt; larvae is proposed. This test is the result of an extensive study in our laboratory, taking into account the advantages and disadvantages of &lt;i&gt;Artemia&lt;/i&gt; bioassays published by various authors. The major advantage of the brine shrimp as a test species is its continuous availability under the form of dry cysts which can be hatched very easily; this eliminates all biological, technological, and financial problems of stock recruitment and/or culturing. The acute test...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nauplii; Toxicity tests; Artemia.
Ano: 1981
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3711

STUDIES ON THE COSTITUENTS OF SWEET PEPPER (SENISE PEPPER PGI) SUBJECTED TO DIFFERENT DRYING TECHNIQUES
Provedor de dados: 21
Autores: Melotti, Edoardo.
The work presented in this thesis, which is the first on the subject, was carried out at the Department of Chemistry, University of Milan under the supervision of Prof. Giovanna Speranza and Dr. Carlo Morelli within the project : “Drying, Juices and Jams of Organic Fruit and Vegetables: What happens to Desired and Non-Desired compounds?” (acronime “FaVOrDeNonDe”). The FaVorDeNonDe project, funded by the action of CORE Organic Plus (Coordination of European Transnational Research in Organic Food and Farming Systems)- Topic 4. Ensuring quality and safety of organic food along the processing chain, is coordinated by Dr. Roberto Lo Scalzo of CREA-IAA of Milan (Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria - Unità di ricerca per i...
Tipo: Thesis
Palavras-chave: Food security; Food quality and human health.
Ano: 2016

Soil Fertility: A summary of research conducted under the German Federal Programme for Organic Agriculture and other forms of Sustainable Agriculture
Provedor de dados: 21
Autores: ANON,.
Since 2002, the federal research programme for organic agriculture has supported research projects on soil fertility. Research projects at the beginning studied specific subject areas such as comparison of various mulch materials, nutrient mobilisation (especially phosphorus), humus balance and soil erosion. This addressed gaps especially in methods in organic practice, where data acquired from conventional agriculture are not applicable. From 2008, the research on soil fertility significantly increased and there was a special focus on interdisciplinary systems approaches. The joint research project on the management of soil fertility in organic farming, for example, examined a number of factors that interact in this field, such as tillage and soil...
Tipo: Other
Palavras-chave: Soil.
Ano: 2012
URL: http://orgprints.org/21868/1/BOEL_soil%20fertility_2012.pdf

Wildlife and Biodiversity: integration and management of farming and wildlife for their mutual benefit
Provedor de dados: 21
Autores: Stocker, Phil; Hewlett, Kathleen; Brighton, Robbie.
This review summarises key research findings regarding the beneficial integration of wildlife and bio-diversity within organic farming.  In an ecological and agricultural context bio-diversity would ideally include the diversity of livestock breeds and crop species and varieties, their effect on wildlife habitats, and their role in supporting natural habitats and landscapes.  However this subject area is outside the scope of this review and although the presence of such diversity on organic farms will have impacted on the research findings studied, little specific research has been conducted.    The objective of this review is to provide information to advisors, based on peer reviewed research, to increase the scope and abundance of wildlife and...
Tipo: Other
Palavras-chave: Crop combinations and interactions; Biodiversity and ecosystem services.
Ano: 2008
URL: http://orgprints.org/5590/1/Res_review_18_stocker.doc

Genetic indications of translocated and stocked grey  partridges (Perdix perdix): Does the indigenous Danish grey partridge (Perdix perdix) still exist?
Provedor de dados: 21
Autores: Andersen, Liselotte Wesley; Kahlert, Johnny.
Non-local population stocking can have adverse genetic  effects through loss of genetic diversity and introgressive hybridisation in wild populations exploited by man. The grey partridge (Perdix perdix) has been an important European game species for centuries, widely subject to translocation and stocking. After ca 80 years releasing reared grey partridges into Danish wild partridge areas, this study investigated whether an indigenous Danish grey partridge still existed. We predicted that (i) an indigenous Danish partridge would belong to the western European clade (W1) and (ii) would be more closely related to the historical, indigenous grey partridges than to farm bred partridges. These predictions were tested analysing the variation in the mitochondrial...
Tipo: Journal paper
Palavras-chave: "Organics" in general.
Ano: 2011
URL: http://orgprints.org/19060/7/19060.pdf

Exploring the multifundtional role of farming systems
Provedor de dados: 21
Autores: Hermansen, John Erik; Noe, Egon; Halberg, Niels.
Farming business is like any other business constantly challenged by the changing demands and expectations from the surroundings – farming even may be more explicitly due to the comprehensive regulation and public support through subsidies within the Europe Union. The development of sustainable farming system has been a main challenge until now, where particular focus has been put on the environmental impact and how to farm without unacceptable environmental impacts. Research and developments efforts included decision support tools for farm management in relation to environmental impact (c.f. Halberg et al., 2005), and the interaction between land use for farming, landscape and ecological services has been subject to considerable efforts (c.f. Gibbon,...
Tipo: Report chapter
Palavras-chave: Farming Systems.
Ano: 2006
URL: http://orgprints.org/15520/1/15520.pdf

Traditional homemade herbal remedies used by farmers of northern Switzerland to treat skin alterations and wounds in livestock
Provedor de dados: 21
Autores: Disler, M.; Schmid, K.; Ivemeyer, S.; Hamburger, M.; Walkenhorst, M.
Ethnoveterinary surveys are missing for wide areas of Europe. During the years 2011 and 2012 80 farmers on 64 farms in seven cantons of Northern Switzerland (Aargau, Zürich, Schaffhausen, St. Gallen, Thurgau, Appenzell Innerhoden and Appenzell Ausserrhoden) were interviewed. More than 500 homemade herbal remedies (HMHR) were documented regarding the used plant species, modes of preparation, dosage, routes of administration, category of use and origin of knowledge. A selection was made by choosing all HMHR which (a) contain only one herbal drug, (b) are used to treat skin alterations and wounds, (c) were administered to the skin, (d) were obtained from forefathers and relatives and (e) have been used by the interview partners themselves at least 5 times...
Tipo: Journal paper
Palavras-chave: Production systems; Health and welfare.
Ano: 2013
URL: http://orgprints.org/25312/1/disler-etal-2013-PlantaMedical-79-PL24.pdf

Linking N2O emissions from biochar-amended soil to the structure and function of the N-cycling microbial community
Provedor de dados: 21
Autores: Harter, Johannes; Krause, Hans-Martin; Schüttler, Stefanie; Ruser, Reiner; Fromme, Markus; Scholten, Thomas; Kappler, Andreas; Behrens, Sebastian.
Nitrous oxide (N2O) contributes 8% to global greenhouse gas emissions. Agricultural sources represent about 60% of anthropogenic N2O emissions. Most agricultural N2O emissions are due to increased fertilizer application. A considerable fraction of nitrogen fertilizers are converted to N2O by microbiological processes (that is, nitrification and denitrification). Soil amended with biochar (charcoal created by pyrolysis of biomass) has been demonstrated to increase crop yield, improve soil quality and affect greenhouse gas emissions, for example, reduce N2O emissions. Despite several studies on variations in the general microbial community structure due to soil biochar amendment, hitherto the specific role of the nitrogen cycling microbial community in...
Tipo: Journal paper
Palavras-chave: Air and water emissions; Soil.
Ano: 2014
URL: http://orgprints.org/25755/1/Harter_et_al_ISMEJ_2013.pdf

Organic Sensory Information System (OSIS): Documentation of sensory properties through testing and consumer research for the organic industry
Provedor de dados: 21
Distributors and promoters of organic food claim superior tastes for their products compared to the conventional alternative. This argument however is still subject to a hard debate and thus deserves more scientific evidence. Since repurchases are dependent on the overall liking of a product, and sensory experiences may have an important impact, knowledge about these dimensions is crucial for producers and marketers of organic food to offer products which meet consumer expectations. The main purpose of this project therefore is to develop the first Organic Sensory Information System (OSIS), a multilingual and centrally based data folder for data deposition along with an interface scheme that serves as a basis for data exchange to the benefit of the organic...
Tipo: Project description
Palavras-chave: Food security; Food quality and human health Regulation Processing; Packaging and transportation Consumer issues.
Ano: 2023

The Failures of Genetically Modified Organisms (GMOs): Australia as a case study
Provedor de dados: 21
Autores: Paull, John.
Genetically modified organisms (GMOs) have failed on many levels including: social, political, legal, economic, agronomic and ecologic. After three decades of promotion, promises and contention, 3.8% of global agriculture is GMO agriculture. Mechanisms for compensating farms contaminated by GMOs are lacking, and the GMO industry has taken no responsibility for contaminations. GMOs are a threat to the organic sector and the maintenance of certification and price premiums. Only 24 countries grow GMOs commercially. Four countries of North and South America (USA, Canada, Brazil and Argentina) account for 85% of the global GMO hectares. Four crops (soy, corn, cotton and canola) account for 99% of GM hectares. Despite the veneer of social validity that...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general Social aspects Values; Standards and certification Food systems Environmental aspects Knowledge management Regulation.
Ano: 2019
URL: http://orgprints.org/36573/1/Paull.2019.AgrosymKeynote.GMOs.pdf

Ecropolis: sensory properties of organic food  Organic Sensory Information System (OSIS): Documentation of sensory properties through testing and consumer research for the organic industry (Ecropolis)
Provedor de dados: 21
Distributors and promoters of organic food claim superior tastes for their products compared to the conventional alternative. This argument however is still subject to a hard debate and thus deserves more scientific evidence. Since repurchases are dependent on the overall liking of a product, and sensory experiences may have an important impact, knowledge about these dimensions is crucial for producers and marketers of organic food to offer products which meet consumer expectations.   The main purpose of this project therefore is to develop the first Organic Sensory Information System (OSIS), a multilingual and centrally based data folder for data deposition along with an interface scheme that serves as a basis for data exchange to the benefit of the...
Tipo: Project description
Palavras-chave: Food security; Food quality and human health.
Ano: 2023

Organic farm conventionalisation and farmer practices  in China, Brazil and Egypt
Provedor de dados: 21
Autores: Oelofse, Myles; Høgh-Jensen, Henning; Abreu, Lucimar Santiago de; Almeida, Gustavo Fonseca de; El-Araby, Ahmed; Hui, Qiao Yu; Sultan, Tursinbek; de Neergaard, Andreas.
Certified organic agriculture stipulates a range of principles and standards, which govern farmer practices. The recent global expansion of organic agriculture has raised new challenges for organic agriculture, particularly whether management practices in organic farms are subject to the forces of conventionalisation. We studied changes in agroecological practices in certified organic farms in China,Brazil and Egypt. The study takes departure in the conventionalisation hypothesis and the analysis is framed using organic and agroecological principles. The study focuses on agroecological design principles, inherent to organic agriculture, of diversity in crop production, pest, disease and weed management, and soil fertility management. The research design...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Systems research and participatory research; Food systems; Policy environments and social economy; Research methodology and philosophy; Knowledge management.
Ano: 2011
URL: http://orgprints.org/23292/7/23292.pdf

Nutrient supply to organic agriculture as governed by EU regulations and standards in six European countries
Provedor de dados: 21
Autores: Loes, A-K.; Bünemann, E.; Cooper, J.; Hörtenhuber, S.; Magid, J.; Oberson, A.; Möller, K.
Organic farming systems need to replace nutrients exported via farm products, especially phosphorus (P) which may otherwise become depleted in soil in the long term. In Europe, EU regulations for organic production are shaping the farming systems with respect to inputs of nutrients. Permitted off-farm P sources include conventional animal manure, composted or anaerobically digested organic residues, rock phosphate, and some animal residues such as meat and bone meal. The recent proposed revision of EU regulations for organic production (2014) puts less emphasis on closing nutrient cycles and instead aims at minimizing off-farm inputs, to reduce the risk of importing contaminants. This development, which has received little attention from the organic sector...
Tipo: Journal paper
Palavras-chave: Soil quality; Composting and manuring; Regulation.
Ano: 2016
URL: http://orgprints.org/32308/1/loes-etal2016-OrgAgri-online-p1-24.pdf

COBRA: Coordinating Organic Plant Breeding Activities for Diversity
Provedor de dados: 21
Organic plant production is currently challenged by several pressure factors. Along with perennial problems such as weed control, climate change is threatening to affect crop production through increasing weather variability. Plant breeding is a crucial factor in creating organic crop production systems that can better cope with such interacting stresses and producers need crop varieties with (a) good resistance against pests and diseases, esp. seed borne diseases; (b) the ability to react to environmental, esp. climatic variability; and (c) high competitiveness against weeds. COBRA aims to support and develop organic plant breeding and seed production with a focus on increasing the use and potential of plant material with High genetic Diversity (Hi-D) in...
Tipo: Project description
Palavras-chave: Breeding; Genetics and propagation Crop health; Quality; Protection Regulation.
Ano: 2023
URL: http://orgprints.org/22617/1/COBRA_short_description_Orgprints_2ndCall%20V1.0.pdf

Final report on aquaculture (Part A)
Provedor de dados: 21
Autores: Beck, Alexander; Bouilhol, M.; Ball, K.; Cabaret, Jacques; Halberg, Niels; Ivanova-Peneva, Sonya; Melby Jespersen, Lizzie; Lampkin, Nicolas; Lembo, Guiseppe; Moritz, Robin F.A.; Ruiz, R.G.; Speiser, Bernhard; Tittarelli, Fabio.
In consideration of:  • the lack of organic juveniles reported by some MS;  • the restriction on the movement of live animals between countries and regions based on the Council Directive (EC) No 88/20062;  • the reluctance of farmers to introduce on their farms animals which could be unsuitable for the local (geographical) environment (e.g. genetic or population traits, resistance to different diseases, growth performances, reproductive cycle, behavioural characteristics, etc.); and  • the lack in the Commission Regulation (EC) No 889/20083 of specific organic rules for managing the life cycle stage between the hatching and the weaning of juveniles,  the Group supports the use of non-organic juveniles, for on-growing purposes, when organic aquaculture...
Tipo: Report
Palavras-chave: Aquaculture.
Ano: 2013
URL: http://orgprints.org/25618/1/final_report_egtop_on_aquaculture_part-a_en.pdf

Interactions between fungal plant pathogens on leaves. Especially simultaneous development of Rhynchosporium secalis and Drechslera teres on barley
Provedor de dados: 21
Autores: Vollmer, Jeanette Hyldal.
Disease causing fungi are a major potential threat to yield in both organic and conventional cereal production, and generally several different species of pathogenic fungi are found together on the same plants in the field. This PhD thesis concludes that interaction between different fungal  species may influence total disease levels and often via negative effects, such that less disease is observed where several diseases occur together relative where they are found individually.   Such potential interaction effects have often been ignored in the past, as plant diseases have traditionally  been studied as single independent events. The thesis provides an important review of  available literature on the subject; which considers the theoretical background...
Tipo: Thesis
Palavras-chave: Crop health; Quality; Protection.
Ano: 2006
URL: http://orgprints.org/8166/1/8166.pdf

A scale to measure attitude of registered organic farmers towards organic livestock farming
Provedor de dados: 21
Autores: Bodapati, Subrahmanyeswari; Chander, Mahesh.
Organic farming an innovative area gaining importance worldwide and became a boon to the areas which are organic by default and far from the reach of green revolution technologies. Uttarakhand state in India, where most of its farming is organic by default, promoting organic farming in a systematic way through creation of special institutions like UOCB. As attitudes assist individuals in processing complex information and to make decisions, an instrument has been developed to measure attitude of organic farmers towards organic  livestock farming, for which ‘Likert method of summated ratings’ was followed. A total of 102 statements were developed from the subject matter of organic animal husbandry standards, worked out by the Ministry of Commerce and...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Farming Systems; Animal husbandry; Social aspects.
Ano: 2008
URL: http://orgprints.org/24263/3/24263.pdf

Root Growth and Nitrogen Utilization of a Leek Crop and an Undersown Catch Crop
Provedor de dados: 21
Autores: Nielsen, Dr. Kai Lønne; Thorup-Kristensen, Dr. Kristian.
After its late harvest a leek (Allium porrum) crop will normally leave large quantities of nitrogen (N) in the soil which may be subject to leaching. A possible method to reduce N leaching losses is to establish a catch crop before the harvest of the leek crop. It was the aim of this study to investigate the effects of incorporating a catch crop in a leek crop with minimal competition and to monitor how root growth affected N availability across soil depths at different distances between catch and leek crop rows. To reduce competition between both crops leek was planted at 0.5 and 0.75 m row distances and chicory (Cichorium intybus) as a catch crop at an interrow spacing of 0.75 m. Minirhizotron glass tubes were inserted in the  middle of the interrow...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Production systems; Crop combinations and interactions; Vegetables.
Ano: 2001
URL: http://orgprints.org/1608/1/KTK_06009.pdf

Modelling soil C and 14C development
Provedor de dados: 21
Autores: Petersen, B.M.; Berntsen, J.
In order to achieve predictive abilities for both short- and long-term simulations, soil organic matter (SOM) models should be developed on the basis of as large and diverse a data-set as possible.    Many SOM models have parameters, where the criteria for estimating their values are not transparent, and few models have been subject to a formal sensitivity analysis regarding the influence of parameter settings.    There is presently a lack of experimental methods to verify the partitioning of SOM into conceptual compartments or pools, and to determine the turnover rate and other characteristics for each. These pool characteristics can thus only be determined indirectly by model calibration. If the model has several SOM pools, then several parameters may be...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology.
Ano: 2004
URL: http://orgprints.org/4655/1/4655.doc

Special issue of Organic Agriculture — Organic 3.0
Provedor de dados: 21
Autores: Rasmussen, Ilse A.; Rahmann, Gerold; Løes, Anne-Kristin.
It is an honor to be able to present this special issue of Organic Agriculture: Organic 3.0 for the Organic World Congress in India 2017. In this issue, we have collected a number of papers relevant for the theme Organic 3.0. This special issue of Organic Agriculture about Organic 3.0 is published in connection to the science track “Innovative research for Organic 3.0” at the Organic World Congress in Delhi, India, November 2017. In the foreword to the proceedings (Rahmann et al. 2017), the challenges listed correspond well to those described and discussed in these five papers. The fact that the paper by Rahmann et al. (2016) that has been online in Organic Agriculture since December 2016, already after 6 months has been downloaded more than 3,000 times...
Tipo: Journal paper
Palavras-chave: Farming Systems; Research methodology and philosophy.
Ano: 2017
URL: http://orgprints.org/34787/1/10.1007%252Fs13165-017-0190-x.pdf

DEVELOPMENT OF THE ORGANIC SECTOR IN POST-SOCIALIST BULGARIA 1990-2013
Provedor de dados: 21
Autores: Stoeva, Svetla; Slavova, Petya; Georgieva, Zdravka.
The aim of the paper is to present the socio-economic and political aspects in the development of organic sector in post-socialist Bulgaria. It will question the building up of the organic concept in terms of national policies, farming practices and market forces in the country.   That topic has its scientific relevance at least in three crucial dimensions. Firstly, because the legacy of the socialist system significantly affected the structure of the agricultural sector as well as the entrepreneurial behavior of the rural population under conditions of transition. Secondly, the analysis is important because it helps to identify the internal (national) and the external (out of the national context) driving forces that influence the development of the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Bulgaria; History of organics; Country reports.
Ano: 2014
URL: http://orgprints.org/23760/1/23760%20IFOAM_2014_Article_Stoeva_Slavova_Georgieva_MM.pdf

Nutrient supply to organic agriculture as governed by EU  regulations and standards in six European countries
Provedor de dados: 21
Autores: Løes, Anne-Kristin; Bünemann, Else K.; Cooper, Julia; Hörtenhuber, Stefan Josef; Magid, Jakob; Oberson, Astrid; Möller, Kurt.
Organic farming systems need to replace nutrients exported via farm products, especially phosphorus (P) which may otherwise become depleted in soil in the long term. In Europe, EU regulations for organic production are shaping the farming systems with respect to inputs of nutrients. Permitted off-farm P sources include conventional animal manure, composted or anaerobically digested organic residues, rock phosphate, and some animal residues such as meat and bone meal. The recent proposed revision of EU regulations for organic production (2014) puts less emphasis on closing nutrient cycles and instead aims at minimizing off-farm inputs, to reduce the risk of importing contaminants.  This development, which has received little attention from the organic...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Quality and evaluation of inputs; Regulation.
Ano: 2016
URL: http://orgprints.org/30522/1/OA%20regulations%202016%20Loes%20et%20al%20printed.pdf

Current evaluation procedures for plant protection products used in organic agriculture. Proceedings of a workshop held September 25–26, 2003 in Frick, Switzerland
Provedor de dados: 21
The report describes the evaluation procedures for plant protection products used in organic agriculture. The articles, written by experts on the subject, summarize the situation in various (mainly European) countries and the evaluation procedures and criteria for international institutions (Codex Alimentarius, IFOAM Basic Standards).     This volume of proceedings was produced as part of a workshop of the European funded Project ‘Organic Inputs Evaluation’.      Table of Contents      Foreword  Summary Bernhard Speiser and Otto Schmid    Plant protection products in organic farming in Austria   Alexandra Hozzank     Plant protection products in organic farming in Denmark   Rasmus Ørnberg Eriksen     Plant protection products in organic farming in France...
Tipo: Book
Palavras-chave: Crop health; Quality; Protection.
Ano: 2004
URL: http://orgprints.org/2942/1/speiser-schmid-2004-inputs-oe.pdf

Organic farm conventionalisation and farmer practices in China, Brazil and Egypt.
Provedor de dados: 21
Autores: Oelofse, Myles; Hegh-Jensen, Henning; Abreu, Lucimar Santiago de; Almeida, Gustavo F.; El-Araby, Ahmed; Yu Hui, Qiao; Sultan, Tursinbek; Neergaard, Andreas de.
Certified organic agriculture stipulates a range of principles and standards, which govern farmer practices. The recent global expansion of organic agriculture has raised new challenges for organic agriculture, particularly whether management practices in organic farms are subject to the forces of conventionalisation. We studied changes in agroecological practices in certified organic farms in China, Brazil and Egypt. The study takes departure in the conventionalisation hypothesis and the analysis is framed using organic and agroecological principles. The study focuses on agroecological design principles, inherent to organic agriculture, of diversity in crop production, pest, disease and weed management, and soil fertility management. The research design...
Tipo: Journal paper
Palavras-chave: Production systems; Farm economics.
Ano: 2011
URL: http://orgprints.org/22760/1/Organic%20farm%20%20conventionalissation%20and%20farmer%20pratices%20in%20China%2C%20Brasil%20and%20Egypt.pdf

Providing organic school food for youths in Europe - Policy strategies, certification and supply chain management in Denmark, Finland, Italy and Norway
Provedor de dados: 21
In the proceedings of an iPOPY seminar, some results of the research project were presented. First of all, Anne-Kristin Løes and Benjamin Nölting give an overview of the iPOPY project and its first results. This outline of the holistic research approach helps locate the challenges of the supply side of POPY, some crucial aspects of which are analyzed in the following papers. Political strategies are highly relevant for changing the “politicized market” of public food procurement. Thorkild Nielsen, Niels Heine Kristensen and Bent Egbert Mikkelsen reflect on whether and how organic food in schools and kindergartens can be described as a part of an ecological modernization strategy in Denmark. They discuss how it has merged with more economically and...
Tipo: Proceedings
Palavras-chave: Markets and trade Processing; Packaging and transportation Produce chain management.
Ano: 2009
URL: http://orgprints.org/15540/1/15540.pdf

Regional marketing: A summary of research conducted under the German Federal Programme for Organic Agriculture and other forms of Sustainable Agriculture
Provedor de dados: 21
Autores: ANON, AN.
Since 2002, the federal research programme for organic agriculture has supported research projects on soil fertility. Research projects at the beginning studied specific subject areas such as comparison of various mulch materials, nutrient mobilisation (especially phosphorus), humus balance and soil erosion. This addressed gaps especially in methods in organic practice, where data acquired from conventional agriculture are not applicable. From 2008, the research on soil fertility significantly increased and there was a special focus on interdisciplinary systems approaches. The joint research project on the management of soil fertility in organic farming, for example, examined a number of factors that interact in this field, such as tillage and soil...
Tipo: Other
Palavras-chave: Markets and trade.
Ano: 2012
URL: http://orgprints.org/21873/1/BOEL%20regional%20marketing_2012.pdf

Different sizes of the smallest individual sampled and their interpretations: case study in the seasonally dry forest
Provedor de dados: 190
Autores: Arruda, Daniel Meira; Batista, Márcio Luiz; Simão, Marcos Vinicius Ribeiro de Castro; Duque-Brasil, Reinaldo; Ferreira-Júnior, Walnir Gomes; Schaefer, Carlos Ernesto Gonçalves Reynald.
The dry forests, widely distributed in Brazil, are formations subject to different sampling method. Consequently, the data generated may affect the comparison among other vegetation formations. Therefore, this study presents and discusses changes caused by sampling vegetation using circumference at soil height (CSH) ≥ 10 cm and circumference at breast height (CBH) ≥ 15 cm. Different criteria provide an ambiguous vision of a same forest fragment, resulting in different structure and species richness.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Sampling methodology; Seasonally Tropical Dry Forest; Arboreal Caatinga Fitossociologia Fitossociologia; Métodos de amostragem; Mata Seca; Caatinga Arbórea.
Ano: 2012
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/380

The Role of Mineral Nutrition on Adventitious Rooting in Woody Plant Species
Provedor de dados: 190
Autores: Cunha, Ana Catarina M. C. Mori da; Paiva, Haroldo Nogueira de; Xavier, Aloisio; Otoni, Wagner Campos.
In vegetative propagation by means of root cuttings, the nutritional status determines the amount of carbohydrates, endogenous auxin levels, among other metabolites, fundamental for the root initiation and to the speed that rhizogenic events progress. An especial  attention should be given to the nutritional status of the donor-plants, in order to better assist the nutritional demands by the adventitious rooting process. Although mineral nutrition and adventitious rooting are intimately related, the subject is rather difficult to study, sincethe later involves multiple steps and few studies have aimed to elucidate the relationship between the mineral nutrition and rooting phases. In this review, the phases of the rhizogenesis are highlighted and the role...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vegetative propagation  adventitious rooting  nutrition mineral  rooting phases  cutting. Propagação vegetativa; Enraizamento adventício; Nutrição mineral; Fases do enraizamento; Estaquia.
Ano: 2010
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/4

Soil microorganisms and their role in the interactions between weeds and crops
Provedor de dados: 87
Autores: Massenssini,A.M.; Bonduki,V.H.A.; Melo,C.A.D.; Tótola,M.R.; Ferreira,F.A.; Costa,M.D.
The competition between weeds and crops is a topic of great interest, since this interaction can cause heavy losses in agriculture. Despite the existence of some studies on this subject, little is known about the importance of soil microorganisms in the modulation of weed-crop interactions. Plants compete for water and nutrients in the soil and the ability of a given species to use the available resources may be directly affected by the presence of some microbial groups commonly found in the soil. Arbuscular mycorrhizal fungi (AMF) are able to associate with plant roots and affect the ability of different species to absorb water and nutrients from the soil, promoting changes in plant growth. Other groups may promote positive or negative changes in plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition; Agriculture; Mycorrhizal fungi; PGPR; Ecology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400022

Relationships between Agricultural policies and Environmental Effects in Japan: An Environmental-Economic Integrated Model Approach
Provedor de dados: 31
Autores: Sasaki,   Hiroki.
This study investigates the optimal agricultural land use allocation and nitrogen application to a representative Japanese farm. The site-specific nature of numerous agri-environmental issues necessitates analysis at a disaggregated level in order to capture the underlying heterogeneity of agricultural productivity and environmental sensitivity across different parcels of land. This study adopts an integrated approach—a decision-making economic model for representative farms is combined with a stylized site-specific biophysical model, which quantifies the impact of different policy instruments on agricultural production practices and on multiple environmental effects. This model estimates the government budget outlays and social welfare, which require...
Tipo: Conference Paper or Presentation
Palavras-chave: Integrate model; Agri-environmental policy; Paddy field; Production quota; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Production Economics; Productivity Analysis.
Ano: 2010
URL: http://purl.umn.edu/109399

CLIMATE CHANGE EFFECTS AND AGRICULTURAL SECTOR. ANY PERSPECTIVE FOR AN EUROPEAN RISK MANAGEMENT POLICY?
Provedor de dados: 31
Autores: Cucuzza,   Giuseppe.
The struggle against climate change represents one of the ‘new challenges’ which agriculture will have to face in the immediate future. The “Health Check” of the Common Agricultural Policy together with questions about the efficacy and simplification of the direct aid system and the adaptation of support tools for the European Union market, give climate change a central role in the relationship between agriculture and the environment, in that they are considered likely to affect the chances of success in terms of bioenergy increase and a more efficient management of hydro resources (Com 2007/722 fin). Agriculture being subject to the effects generated by climate change should identify and develop solutions that will favour the adaptation of cultivation...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44863

FONTES DE CRESCIMENTO DAS EXPORTAÇÕES DO COMPLEXO SOJA BRASILEIRO
Provedor de dados: 31
Autores: Coronel,   Daniel Arruda; Carvalho,   Fatima Marilia Andrade de; Machado,   Joao Armando Dessimon.
O objetivo deste trabalho é identificar as principais fontes de crescimento das exportações brasileiras de soja em grão, farelo e óleo de 1995 a 2004. Para tanto, utilizou-se o modelo de comércio internacional Constant-Market-Share, que permitiu decompor as fontes de crescimento em quatro efeitos, quais sejam, crescimento do comércio mundial, composição da pauta, destino das exportações e competitividade. Os dados para o cálculo do modelo Constant-Market-Share foram coletados junto ao Sistema de Análise das Informações de Comércio Exterior (ALICE), da Secretaria de Comércio Exterior (SECEX), que possui os dados de exportações brasileiras Free on Board (FOB) em dólares, à Food and Agriculture Organization of the United Nations (FAO) e à Organização Mundial...
Tipo: Conference Paper or Presentation
Palavras-chave: Complexo Soja; Constant-Market-Share; Comércio Internacional; Soy Complex; Constant-Market-Share; International Commerce; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/103128

Study on Ecological Compensation System and Land Desertification Control
Provedor de dados: 31
Autores: Lu,   Zhixiang; Gao,   Bingtao.
The problems of desertification control in China are analyzed from the perspective of ecological compensation. Firstly, there is no guarantee of ecological compensation system in desertification control. On the basis of knowing land desertification connotation, the western region is taken as an example to analyze the serious consequence brought by land desertification, besides, the connotation and importance of ecological compensation are summarized, as well as the views related to resolve the benefit compensation of ecological environment in the world are introduced. The ecological compensation is mainly based on the compensation theory of public goods and the value theory of ecological environment, besides, it emphasizes using tax to realize...
Tipo: Thesis or Dissertation
Palavras-chave: Ecological compensation system; Land desertification; Creative Conception; China; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/54032

Towards the Development of Innovative Strategies for Traditional Food Chains in the EU
Provedor de dados: 31
Autores: Molnar,   Adrienn; Gellynck,   Xavier; Vanhonacker,   Filiep; Verbeke,   Wim.
Traditional food products (TFPs) represent an important part of each European Member State’s cultural heritage and provide critical economic inputs to many regions via their production and sale. Nevertheless, a major challenge for the traditional food sector is to improve its competitiveness by applying innovations while at the same time maintaining traditionalism. Therefore, modernization of all aspects of the traditional food sector is necessary with special emphasis on the integrity of chains (EC, 2007). This illustrates a need for a chain strategy for the traditional food sector in the EU. Despite this recognition, the actual development of such chain strategies lags behind because of some particular issues which still needs to be addressed (e.g....
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Agricultural and Food Policy; Farm Management; Food Consumption/Nutrition/Food Safety.
Ano: 2009
URL: http://purl.umn.edu/59207

Economic Efficiency of Compost Production: The Case of Israel
Provedor de dados: 31
Autores: Kan,   Iddo; Ayalon,   Ofira; Federman,   Roy.
This paper presents a comprehensive economic analysis of recycling organic wastes through composting. A mathematical programming model is developed to examine the optimal level of compost production from sources of organic municipal solid waste, livestock manure and wastewater-treatment sludge. The model incorporates the spatial nature of the problem by referring to the locations of the sources for raw organic matter, of the composting plants and agricultural regions. Agricultural demand for compost is derived using estimated production functions for 42 crops, price elasticity of the vegetative agricultural outputs, and farmers' stated willingness to utilize compost. The model accounts for the costs of waste collection, compost production, transportation...
Tipo: Working or Discussion Paper
Palavras-chave: Compost; Economics; Livestock-Manure; Mathematical-Programming; Municipal-Solid-Waste; Waste-Water-Treatment-Sludge.
Ano: 2008
URL: http://purl.umn.edu/42831

SOME ECONOMIC ASPECTS OF THE HUNGARIAN BIOFUEL PROGRAMS
Provedor de dados: 31
Autores: Lakner,   Zoltan; Szabo-Burcsi,   Dora; Mago,   Laszlo.
The use of renewable materials in energy production is gaining in importance all over the world. The production of bioethanol and biodiesel is an important element of the agricultural strategy of numerous countries, even though the economic and environmental impact of these projects is subject to significant debates. Our paper analyses the welfare effects of the Hungarian bioethanol programme, as well as the economic feasibility of the projects. It can be demonstrated that the Hungarian bioethanol programme will cause a rather marginal increase in agricultural prices.  The cost of bioethanol production is estimated between 470 and 630 €/m3, influenced by numerous factors. This estimate is in line with the average European values. The possibilities for...
Tipo: Journal Article
Palavras-chave: Comparative analysis; Simulation; Return on investment; Welfare economics; Beruházás-gazdaságosság; Összehasonlító vizsgálat; Jóléti elemzés; Szimuláció.; Agricultural and Food Policy; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/99205

U.S. PROCESSED FOOD EXPORTS AND FOREIGN DIRECT INVESTMENT IN THE WESTERN HEMISPHERE
Provedor de dados: 31
Autores: Mattson,   Jeremy W.; Koo,   Won W.
U.S. exports of processed food products and sales by foreign affiliates of U.S. companies in the industry have been growing rapidly.  Canada and Mexico are the United States' two major trading partners in the Western Hemisphere, while small quantities of processed food products are exported to a number of other countries in the hemisphere.  U.S. Foreign Direct Investment (FDI), like exports, is also largest in Canada and Mexico, but there is also significant FDI in the processed food industry in South American countries such as Brazil and Argentina.  U.S. FDI, measured as sales by foreign affiliates, is significantly greater than U.S. processed food exports.   The relationship between FDI and trade is subject to much debate and analysis.  An econometric...
Tipo: Working or Discussion Paper
Palavras-chave: Processed foods; Foreign direct investment; Western Hemisphere; International Relations/Trade.
Ano: 2002
URL: http://purl.umn.edu/23547

Impact of Labor Standards on Egyptian Exports with Special Emphasis on Child Labor
Provedor de dados: 31
Autores: Ghoneim,   Ahmed Farouk; Grote,   Ulrike.
A large proportion of internationally traded goods are subject to labor standards and this proportion is on a continuing rise. Such developments created a hot debate about the impact of labor standards on trade, but there has been no clear international consensus on the net costs and benefits arising from such regulations on market access, export performance and competitiveness in developing countries. This study contributes to the debate by providing results from a survey of 83 firms in the textiles and ready-made garments industry in Egypt. The main result which derived from the descriptive analysis is that child labor is a phenomenon that exists in the textiles and ready-made garments industry with a relatively high share in the sample (16%). All...
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital.
Ano: 2006
URL: http://purl.umn.edu/7128

O SETOR CONFECÇÕES DE VESTUÁRIO E ACESSÓRIOS: ESTRATÉGIAS COMPETITIVAS
Provedor de dados: 31
Autores: Alves,   Rozane.
O objetivo do artigo é apresentar algumas evidências empíricas do setor de confecções de vestuário e acessórios. Pretende-se analisar as estratégias utilizadas pelas empresas de Confecção do Brasil, para fazer frente às mudanças provocadas pela reestruturação produtiva após 1990. Os  procedimentos metodológicos realizados envolveram a discussão das estratégias de produção, a utilização de novas tecnologias, a organização, o gerenciamento, a comercialização, as alianças, as parcerias e as associações entre as empresas de confecção e os potenciais resultados, assim como o levantamento de dados secundários da indústria e a análise dos dados da PINTEC (2005), divulgados em agosto de 2007. O processo foi alvo de intenso de debate entre os economistas e a...
Tipo: Conference Paper or Presentation
Palavras-chave: Reestruturação Produtiva; Estratégias Competitivas; Setor de Vestuário; Restructuring Productive; Competitive Strategies; The Clothing Industry; Food Security and Poverty.
Ano: 2008
URL: http://purl.umn.edu/109997

Stated preference surveys of remnant native vegetation conservation
Provedor de dados: 31
Autores: Lockwood,   Michael; Carberry,   David.
Improving the conservation status of remnant native vegetation on private property (RNV) has a number of economic benefits. RNV can contribute to on-farm productivity through provision of unimproved grazing, timber products and stock shelter. It may contribute to enhancing the productivity of downstream properties though amelioration of land degradation associated with salinity, water quality decline and soil erosion. The Australian community might also place value on certain attributes of RNV such as its scenic amenity and contribution to biodiversity conservation. Where these community values can be expressed in terms of trade-offs between RNV conservation and other things of value such as personal disposable income, they can be assessed using economic...
Tipo: Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/123831

WESTERN CANADA’S EXPORTS: CAUSES AND IMPLICATIONS OF CHANGING COMPETITIVENESS IN KEY MARKETS
Provedor de dados: 31
Autores: Mirus,   Rolf; Ryan,   Chris.
This report surveys the export performance of Western Canadian goods producers for the period 1995 to 2007. During that period Canada’s GDP growth outpaced export growth, but Western Canada’s exports grew at a faster rate than Canada’s exports overall, resulting in increased weight of Western exports in Canada’s total. As well, Western Canada’s exports have shifted significantly towards the NAFTA markets of US and Mexico. The composition of products exported from the West and the individual provinces is shown in detail. Each province is found to have unique export strengths. During the observation period, B.C.’s exports were the most volatile and Manitoba’s the least, but overall the provincial economies of Alberta and Saskatchewan were the most volatile....
Tipo: Report
Palavras-chave: Western Canada; International trade; Trade; Competitiveness; Key markets; NAFTA; FTA; Free trade agreements; Imports; Exports; United States; Alberta; Western provinces; International Development; International Relations/Trade; Political Economy; Public Economics.
Ano: 2008
URL: http://purl.umn.edu/60430

The Mekong: Governance Challenges
Provedor de dados: 31
Autores: Hirsch,   Philip.
The Mekong Basin is rich in water and other resources, and the six countries that share it include some of the world’s poorest on a per capita income basis. They also include some of the world’s fastest growing economies. Two of the countries also have fast growing rural populations. The Mekong is a shared resource. It is shared across borders, among more than 60 million people who live in the basin, between those who live in the basin and others who draw on its resources, between farmers, fishers, power producers, consumers and many others. Water appropriation for human use is currently only about 12 per cent of total flow. Although dams currently regulate only five per cent of the waters in the basin, many large hydropower dams have been proposed or are...
Tipo: Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/124472

Farm Modelling for Interactive Multidisciplinary Planning of Small Grain Production Systems in the Western Cape, South Africa
Provedor de dados: 31
Autores: Hoffman,   Willem; Kleynhans,   Theo E.
Subject matter research has made many contributions to small grain production in the Western Cape province of South Africa, but much of this focuses on single commodities and is undertaken within conventional disciplinary boundaries (e.g. soil science, genetics, economics). The result is that the solutions offered often have knock-on effects that are not properly accounted for by researchers. Expert group discussions, as a research method, are suitable, firstly, for gathering information in a meaningful manner and, secondly, to stimulate individual creativity by presenting alternative perspectives provided by various participating experts. In support of expert group discussions, multi-period wholefarm simulation models were developed. This type of...
Tipo: Conference Paper or Presentation
Palavras-chave: Whole-farm modelling; Expert group discussions; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/101640

O mercado de carbono como instrumento de conservação da floresta amazônica
Provedor de dados: 31
Autores: Lamarca Junior,   Mariano Rua; Silva,   Cesar Roberto Leite da.
Este trabalho analisa a questão ambiental presente nas políticas públicas para a região amazônica, incluindo a Lei de Gestão de Florestas Públicas (Lei 11.284/06), sancionada com o objetivo de regulamentar a gestão de florestas  públicas no Brasil e promover o desenvolvimento sustentável. O Mecanismo de Desenvolvimento Limpo (MDL) do Protocolo de Kyoto é sugerido como instrumento de conservação florestal. Por meio de um cenário hipotético de desmatamento “zero” e 100% do carbono não emitido vinculado a projetos de conservação florestal, estimou-se que uma receita econômica equivalente à da exploração madeireira poderia ser obtida no mercado de carbono, contribuindo para a manutenção do equilíbrio climático reduzindo a emissão de Gases de Efeito Estufa, bem...
Tipo: Conference Paper or Presentation
Palavras-chave: Mercado de carbono; Protocolo de Kyoto; Mecanismo de desenvolvimento limpo (MDL); Conservação da floresta amazônica; Aquecimento global; Carbon market; Kyoto Protocol; Clean development mechanism (CDM); Amazon forest conservation; Global warming; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108159

The U.S. Patent System and Developing Country Access to Biotechnology: Does the Balance Need Adjusting?
Provedor de dados: 31
Autores: Taylor,   Michael R.; Cayford,   Jerry.
Many agricultural and food security experts believe that biotechnology has potential to assist developing country farmers in meeting current and future food needs. Most of the tools of biotechnology have been developed, however, by companies, governments, and universities in industrialized nations; are the subject of U.S. patents; and have so far been applied commercially to address the needs of large-scale growers in the United States and other developed countries. For commercial and other reasons, applications of biotechnology that might benefit developing country farmers are unlikely in the foreseeable future to be developed and disseminated through commercial channels. At the same time, noncommercial, public sector researchers report that their access...
Tipo: Working or Discussion Paper
Palavras-chave: United States patents; Agricultural biotechnology; Developing countries; Food security; Research and Development/Tech Change/Emerging Technologies; O34; Q16.
Ano: 2002
URL: http://purl.umn.edu/10872

Policy Space for Development in the WTO and Beyond: The Case of Intellectual Property Rights
Provedor de dados: 31
Autores: Shadlen,   Ken.
Global governance in intellectual property (IP) has changed dramatically in the last two decades, and these changes have profound - and worrying - implications for late development. What was once principally an instrument of national policy is now increasingly subject to international disciplines, as the world moves ever-closer to harmonization in the area of IP management. But moving toward harmonization and achieving harmonization are different matters, and it is essential to keep in mind that the former and not the latter describes contemporary arrangements: the trend is toward a reduction in policy space, a feature that many scholars and activists point to with great concern (Gallagher, 2005), but the outcome remains one where countries retain space...
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005
URL: http://purl.umn.edu/15577

Threats from Illegal Fishing
Provedor de dados: 31
Autores: MacDonald,   Ian.
Before I start my presentation on the very important subject of illegal fishing, I do want to congratulate Dr Meryl Williams on her appointment to the Chair of the Board of Management of the Australian Centre for International Agricultural Research and President of its Policy Advisory Council. I am very pleased to note that for the first time we have in the position someone who does have a very distinguished background in fisheries. I also am delighted to have someone there who lived in the same small country town as I did in Queensland. Fish, fisheries, fisheries management, oceans and seas are particularly important for a country like Australia where our marine jurisdiction is about twice the size of the nation’s landmass. One of the major differences...
Tipo: Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/124072

INSTRUMENTOS DE FINACIAMENTO DA AGRICULTURA BRASILEIRA, BREVE RELATO.
Provedor de dados: 31
Autores: Bernardes,   Alexandre Camara; Leite,   Tasso Souza.
OBJETIVA-SE NESTE ARTIGO, UMA RELEITURA DOS PRINCIPAIS INSTRUMENTOS PÚBLICOS E PRIVADOS DE FINANCIAMENTO DA AGRICULTURA BRASILEIRA. APRESENTADO ALGUNS DE SEUS FUNDAMENTOS OPERACIONAIS, PROCURA-SE DAR MAIOR ENFOQUE AOS INSTRUMENTOS DA COMERCIALIZAÇÃO AGRÍCOLA E OS EVENTUAIS GARGALOS EXISTENTES TANTO NO SISTEMA NACIONAL DE CRÉDITO RURAL (SNCR) E NO PROGRAMA DE GARANTIA DE PREÇOS MÍNIMOS (PGPM).  ESTES INSTRUMENTOS PASSARAM POR ALTERAÇÕES SIGNIFICATIVAS, EM VIRTUDE DO DECLINO DE OFERTA DE CREDITO RURAL OFERECIDO PELO ESTADO E DAS CONSTANTES RODADAS DE RENEGOCIAÇÕES E PRORROGAÇÕES DE DÍVIDAS. ESTE ARTIGO ESTÁ ESTRUTURADO DA SEGUINTE FORMA: NUM PRIMEIRO MOMENTO ABORDA-SE A ORIGEM DO SNCR E SEUS PRINCIPAIS INSTRUMENTOS, EM SEGUIDA VERIFICAM-SE AS PRINCIPAIS...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultura; Crédito Rural; Comercialização; Agriculture; Rural Credits; Commercialization; Agricultural Finance.
Ano: 2008
URL: http://purl.umn.edu/109767

CROP DIVERSITY AS THE DERIVED OUTCOME OF FARMERS' 'SURVIVAL FIRST' MOTIVES IN ETHIOPIA: WHAT ROLE FOR ON-FARM CONSERVATION OF SORGHUM GENETIC RESOURCES?
Provedor de dados: 31
Autores: Wale,   Edilegnaw; Virchow,   Detlef.
Crop genetic resources are the building blocks of sustainable agricultural development due to their relevance not only as inputs for variety development but also as indigenous crop insurance mechanisms through traditional variety portfolio management. Their continuous survival is, however, threatened by natural and human driven factors. This threat has induced the need for designing conservation measures. Among the in situ and ex situ conservation options available to conserve crop genetic resources, on-farm conservation has recently attracted enormous attention. To make this option operational, placing incentives (that link conservation with utilization) and removal of perverse incentives are believed to be crucial so that landraces of no immediate...
Tipo: Conference Paper or Presentation
Palavras-chave: On-farm conservation; Sorghum genetic resources; Incentives; Poisson regression; Ethiopia; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/25882

The Economics of Geographical Indications: GIs modeled as club assets
Provedor de dados: 31
Autores: Benavente,   Daniela.
Geographical Indications (GIs) for products (Basmati rice, Champagne sparkling wine, Antigua coffee, etc.) were regulated at the international level in 1995 (WTO TRIPS Agreement, Part II, Section 3). This paper sets a general framework of analysis for GI-labeled goods, based on the modeling of a GI as a club asset (partial excludability and no rivalry in benefits to the firms that lawfully label their products with the GI). A model of club reputation is developed which includes Shapiro (1982) and Winfree &amp; McCluskey (2005) as special cases. Reputation is assumed to be traceable through the GI label; quality is endogenously determined at the firm level, with reputation as the state variable. In contrast with previous research, it is shown that the TRIPS...
Tipo: Working Paper
Palavras-chave: International Relations/Trade.
Ano: 2010
URL: http://purl.umn.edu/119116

Multi-criteria analysis for the impact assessment of food safety policies: The case of EU regulation on dietary arsenic
Provedor de dados: 31
Autores: Ragona,   Maddalena; Mazzocchi,   Mario; Alldrick,   A.J.
Developments in knowledge concerning the toxicology and occurrence of dietary arsenic suggest that levels of exposure in some groups of the population within the EU are a cause for concern. This applies also in the case of individual Member States where local regulatory limits exist. The situation is such that some foods on the market are already the subject of consumer advice provided by government agencies. In the light of these considerations, some have suggested that Member States’ legislation concerning arsenic in foods should be modified and harmonised to reflect such developments. An evaluation of alternative policy initiatives is considered in this work. It employed a computer-based, fuzzy multi-criteria impact assessment tool for the...
Tipo: Presentation
Palavras-chave: Multi-criteria analysis; Fuzzy; Regulatory impact assessment; Food safety regulations; Arsenic; Food Consumption/Nutrition/Food Safety; C02; C65; D81; Q18.
Ano: 2012
URL: http://purl.umn.edu/124122

On the Robustness of Robustness Checks of the Environmental Kuznets Curve
Provedor de dados: 31
Autores: Galeotti,   Marzio; Manera,   Matteo; Lanza,   Alessandro.
Since its first inception in the debate on the relationship between environment and growth in 1992, the Environmental Kuznets Curve has been subject to continuous and intense scrutiny. The literature can be roughly divided in two historical phases. Initially, after the seminal contributions, additional work aimed to extend the investigation to new pollutants and to verify the existence of an inverted-U shape as well as assessing the value of the turning point. The following phase focused instead on the robustness of the empirical relationship, particularly with respect to the omission of relevant explanatory variables other than GDP, alternative datasets, functional forms, and grouping of the countries examined. The most recent line of investigation...
Tipo: Working or Discussion Paper
Palavras-chave: Environmental Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/12045

ESTUDIO PROSPECTIVO ALAÑO 2020 SOBRE LA IMPORTANCIA DE LA CALIDAD DE LA LECHE Y QUESO EN LA CADENAAGROALIMENTARIA LECHE EN EL ESTADO DE HIDALGO, MÉXICO
Provedor de dados: 31
Autores: Moctezuma Lopez,   Georgel; Espinosa Garcia,   Jose Antonio; Cuevas Reyes,   Venancio; Romero Santillan,   Fernando; Jolalpa Barrera,   Jose Luis.
The prospective analysis is related directly to the future vision, which cannot be guessed, but if it can be visualized and/or be constructed trought to influence that can be had inside the decision making. The prospective analysis milk and cheese quality that appears, comprises of a project financed by the Foundation Hidalgo Produce and operated by the National Institute Forestry, Agricultural and Livestock Research. The agri-food chain milk analysis, two products were selected to be put under the analysis, vision and evaluation of a panelists experts group who trought Delphi type questionnaire, were shaping their qualifications. To work decision with milk and cheese products was in regard they are most important by volume in that they are consumed and by...
Tipo: Journal Article
Palavras-chave: Agrifood chain; Quality; Milk; Prospection; Cheese.; Agribusiness.
Ano: 2008
URL: http://purl.umn.edu/48823

THE EFFECTS OF EXPORT AND FOOD CROP STRATEGIES ON FARM INCOME AND FOOD SELF-SUFFICIENCY IN EASTERN SENEGAL AND UPPER CASAMANCE:  A LINEAR PROGRAMMING ANALYSIS
Provedor de dados: 31
Autores: Kourouma,   Aboubacar.
The purpose of this paper is to analyze some effects of export and food crop strategies on farm income and food self-sufficiency at the household level in the Eastern and upper Casamance regions of Senegal.  The objectives of the government of Senegal include food self-sufficiency and export crop expansion through crop diversification.  Over the last twenty years, extension programs have emphasized the introduction of cotton and maize.  Although maize seems to have found its way easily in the existing farming system, the performance of cotton is less clear.  After an initial rapid expansion, cotton acreage and production started to decline from the mid 70's.  This raises questions about the lont-term suitability of cotton and emphasizes the need for...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries; International Relations/Trade.
Ano: 1982
URL: http://purl.umn.edu/10981

Returns to scale and dynamics of multiple enterprises
Provedor de dados: 31
Autores: Weaver,   Robert D.
This paper presents a dynamic theory of structural change in which functional change driven by technological change and transactional change open opportunity for change in scale and scope of enterprises. Implementation of change in scale and scope of enterprises is constrained by initial state conditions including resource endowments, access to credit, and regulation. In the presence of such constraints, the paper motivates the existence of thresholds that introduce cusps in the optimal paths of control variables. The evolution of enterprises is considered within the context of a multiple enterprise firm that encompasses discrete and continuous processes that are interdependent on intermediate goods as well as their production of environmental effects....
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural and Food Policy; Farm Management; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/61350

Payments for Watershed Services: An Application to Irrigation Pricing in the El Angel Watershed, Carchi, Ecuador
Provedor de dados: 31
Autores: Vega,   J.; Lee,   David R.; Boisvert,   Richard N.; Steenhuis,   Tammo S.; Proano,   M.; Poats,   S.
Water scarcity is increasingly viewed as the principal constraint limiting agricultural production and human livelihood improvement in the rural areas of many developing countries. Policies that encourage more efficient and equitable water use - including the introduction of incentive-based water pricing systems - are an important challenge. This paper reports the results of a mathematical programming model which was constructed for the El Angel watershed in northern Ecuador with the goal of exploring the effects of several water pricing alternatives. The model incorporates farmers' crop and pasture planting and resource allocation decisions, based on maximizing regional gross margin subject to land, water, labor, seasonal, food security and other...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/25655

Wheat Forward Contract Pricing: Evidence on Forecast Power and Risk Premia
Provedor de dados: 31
Autores: Shi,   Wei; Irwin,   Scott H.; Good,   Darrel L.; Dietz,   Sarah N.
While the risk premium hypothesis in futures markets has been the subject of a long and continuous controversy, the risk premium hypothesis in forward markets is also of interest among economists. The hypothesis is supported by some theoretical arguments and empirical evidence yet remains an open question. We in this study apply a two-equation regression model similar to those used in (Fama and French (1987} and de Roon et al. (1998) to analyze the risk premiums in forward markets, particularly, using the pre-harvest wheat forward markets in Illinois (1982-2004) and Kansas (1990-2004) as an example. The two-equation regression model consists of a forecasting equation, which uses a forward basis during a pre-harvest period to forecast the spot basis at the...
Tipo: Conference Paper or Presentation
Palavras-chave: Marketing.
Ano: 2005
URL: http://purl.umn.edu/19043

An Analysis of the Impact of European Union and United States Dairy Policies on EU-U.S. Trade in Milk Protein Concentrate
Provedor de dados: 31
Autores: Gehrke,   Brad C.; Babula,   Ronald A.; Coleman,   Jonathan R.
During 1996-2000, U.S. imports of milk protein concentrate (MPC) increased rapidly. At the same time, Commodity Credit Corporation (CCC) stocks of non-fat dry milk (NFDM) went from nothing to more than 500 million pounds. Consequently, U.S. milk producers attributed low milk prices and dairy farmer income during this period to the increased imports of MPC. U.S. milk producers were especially concerned with MPC imports for two reasons. First, MPC between 40 and 90 percent protein had been classified in subheading 0404.90.10 of the Harmonized Tariff Schedule of the United States (HTS). Thus, MPC was not subject to the tariff-rate quotas applied to many other dairy products. Second, MPC produced in the European Union (EU) and exported to the United States was...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; International Relations/Trade.
Ano: 2004
URL: http://purl.umn.edu/15875

The Malthusian Paradox: Declining Food Prices in the Very Long Run
Provedor de dados: 31
Autores: Bloch,   Harry; Sapsford,   David.
More than two centuries ago in his Essay on the Principle of Population, Thomas Malthus famously issued his dire prediction that mankind was doomed to survival at a subsistence level. His concept of population growth expanding to absorb the available food supply has been roundly contradicted by history, thanks in part to a declining birth rate in rich countries. However, economics is still the “dismal science”, as the underlying idea of natural resource scarcity impinging on the prospects for progress remains a cornerstone of modern economics. In the case of agriculture, the proposition is that more people or richer people increase the demand for food and given the constraint on arable land, this means that food becomes scarce. In economics, price is taken...
Tipo: Presentation
Palavras-chave: Malthus; Food prices; Schumpeter; Demand and Price Analysis.
Ano: 2012
URL: http://purl.umn.edu/124240

Mitigating the impact of El Nino-related drought on smallholder farmers in Central Sulawesi, Indonesia: An interdisciplinary modelling approach combining linear programming with stochastic simulation
Provedor de dados: 31
Autores: Keil,   Alwin; Teufel,   Nils; Gunawan,   Dodo; Leemhuis,   Constanze.
Crop production in the tropics is subject to considerable climate variability caused by the El Niño-Southern Oscillation (ENSO) phenomenon. In Southeast Asia, El Niño causes comparatively dry conditions leading to substantial declines of crop yields with severe consequences for the welfare of local farm households. Using a modelling approach that combines regression analysis with linear programming and stochastic simulation, and integrates climatic and hydrologic modelling results, the objective of this paper is to assess the impact of El Niño on agricultural incomes of smallholder farmers in Central Sulawesi, Indonesia, and to identify suitable crop management strategies to mitigate the income depressions. The results contribute to the formulation of...
Tipo: Conference Paper or Presentation
Palavras-chave: ENSO; Risk management; Linear programming; Stochastic simulation; Indonesia; Farm Management.
Ano: 2007
URL: http://purl.umn.edu/7942

Modelling Spot Water Markets Under Uncertain Water Supply
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Garrido,   Alberto.
Water availability in semiarid regions usually exhibits patterns of extreme variability. Even in intensively controlled basins, some users are subject to low levels of water reliability, and more vulnerable to periods of extreme scarcity. To reduce their risk exposure more flexible instruments, such as voluntary exchanges of water among users, are required. Recent changes in the Spanish water Law have given an initial impulse to allow for leases of water use rights. Properly designed and monitored, this instrument provides some flexibility to water management, and may increase the economic use efficiency as well as mitigate the adverse economic effects of droughts. This paper looks at the risks and uncertainty dimensions of water markets, which have not...
Tipo: Conference Paper or Presentation
Palavras-chave: Uncertainty; Farm modelling; Water markets; Water supply; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/24820

Auswirkungen einer Entkopplung von Ausgleichszahlungen auf den EU-Getreidemarkt
Provedor de dados: 31
Autores: Gomann,   Horst.
The proposals for reforming the Common Agricultural Policy within the Mid Term Review of the European Commission fueled the discussion about the future of direct payments to farmers. The EU Commission recommends a decoupling of animal and area payments from the production by granting these direct payments as a payment claim per hectare of eligible farm land. However, introducing area tied payments the intended shift of payments “from the produce to the producer” will not take place, but instead an increased transfer of payments to land owners seems likely. This study therefore analyses the impacts of changing the area payments for grand cultures into person-tied payments on the cereals market of the European Union. For the assessment of impacts homogenous...
Tipo: Journal Article
Palavras-chave: Common Agricultural Policy; EU Cereal Market; Decoupling; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2002
URL: http://purl.umn.edu/98267

UMA ABORDAGEM APLICADA DE COMPONENTES PRINCIPAIS NO ESTUDO DO DESENVOLVIMENTO DA MESORREGIÃO METROPOLITANA DE BELO HORIZONTE, MG
Provedor de dados: 31
Autores: Marzano Araujo,   Vanessa; Mota,   Vania Correa; De Lima,   Ivis Bento.
Neste trabalho, buscou-se utilizar a técnica multivariada de análise dos componentes principais para verificar, dentre três indicadores selecionados, qual apresenta maior influência no nível de desenvolvimento da Mesorregião Metropolitana de Belo Horizonte para o ano de 2004. A discussão em torno do tema desenvolvimento é antiga, várias concepções já foram adotadas por teóricos, porém ainda não se conseguiu chegar a uma definição que seja clara sobre o que realmente significa desenvolvimento. A visão contemporânea do termo é que o desenvolvimento deve ir além do estritamente econômico, proporcionando o crescimento das variáveis macroeconômicas e a redistribuição dessas riquezas para toda a população, num processo que também eleve os indicadores sociais e...
Tipo: Conference Paper or Presentation
Palavras-chave: Desenvolvimento Regional; Análise Multivariada; Belo Horizonte; Regional Development; Multivariate Analysis; Belo Horizonte; Community/Rural/Urban Development.
Ano: 2008
URL: http://purl.umn.edu/102226

Investment Policies and Telecommunications Regimes
Provedor de dados: 31
Autores: Drabek,   Zdenek.
This paper looks at the role of the key international agreements in the process of liberalization of the telecommunications industry. We analyse in particular the role of the WTO agreement in furthering liberalization around the world, and the extent to which it provides protection for foreign investors. The analysis includes assessments of not only market access but also the treatment of property rights, rights of way, financial conditions and regulations as well as issues related to market structure and competition. Outstanding issues representing impediments of these agreements are also identified. The approach is to a large extent based on a comparison with other relevant international agreements, especially with NAFTA. The WTO agreement comes out of...
Tipo: Working or Discussion Paper
Palavras-chave: International Economic Order; WTO; NAFTA; Trade Negotiations; International Investment; Telecommunications Services; International Relations/Trade; F02; F13; L96.
Ano: 2002
URL: http://purl.umn.edu/26359

MUNDOS DA PRODUÇÃO DE ALIMENTO: A COMPETIÇÃO NO SISTEMA AGROALIMENTAR PELA LENTE DA ECONOMIA DAS CONVENÇÕES
Provedor de dados: 31
Autores: Souza,   Marco Antonio Ferreira De; Wilkinson,   John.
A competição no sistema agroalimentar revela, atualmente, características semelhantes à de outros sistema produtivos, onde predominam os esforços para diferenciação na oferta de produtos. Atender às exigências da demanda tornou-se uma regra básica para a sobrevivência dos negócios, fazendo com que benefícios como praticidade, variedade, conveniência e qualidade ganhem crescente evidência. Contudo, ao contrário dos outros tipos de bens, qualidade nos alimentos é uma categoria analítica sujeita a distintas interpretações. Os problemas de contaminação e pobreza nutricional nos alimentos geram oportunidades para uma profunda reflexão sobre o sistema de oferta de alimentos e para as ações dos atores econômicos que procuram apresentar projetos de produtos cada...
Tipo: Conference Paper or Presentation
Palavras-chave: Sistema Agroalimentar; Estratégia; Mundos da produção; Agrofood system; Strategy; Worlds of production; Agribusiness.
Ano: 2008
URL: http://purl.umn.edu/113992

Supervision and Transaction Costs: Evidence from Rice Farms in Bicol, The Philippines
Provedor de dados: 31
Autores: Evenson,   Robert E.; Kimhi,   Ayal; Desilva,   Sanjaya.
Labor markets in all economies are subject to transaction costs associated with recruiting, monitoring and supervising workers. Rural labor markets in developing economies, where institutions such as labor and contract law and formal employment assistance mechanisms are not in place, are regarded to be particularly sensitive to transaction cost conditions. The inherent difficulty of measuring transaction costs has limited studies on this topic. In this paper, we analyze supervision activities reported in a cross-section survey of rice farmers in the Bicol region of the Philippines. This survey is unique because it provides supervision data at the farm task level. We present a simple optimization model in which supervision intensity increases the...
Tipo: Working or Discussion Paper
Palavras-chave: Transaction costs; Supervision; Labor markets; Philippines; Crop Production/Industries; 013; D23; J43; Q12.
Ano: 2000
URL: http://purl.umn.edu/28467

SPATIAL TARGETING STRATEGIES FOR LAND CONSERVATION
Provedor de dados: 31
Autores: Newburn,   David A.; Berck,   Peter; Merenlender,   Adina.
Purchasing development rights is a major mechanism for the protection of environmental quality and landscape amenities. This paper provides a targeting strategy for protecting multiple environmental benefits that takes into account land costs and probability of land use conversion. We compare two strategies.  Subject to a budget constraint on parcel purchases, the standard strategy is to target parcels with the highest ratio of environmental benefits to land costs.  The standard strategy selects parcels even if there is little probability that the parcel would otherwise be converted.  Our new strategy targets parcels to minimize the benefit loss from land conversion, which weights parcel based on initial benefit endowment and expected probability of land...
Tipo: Conference Paper or Presentation
Palavras-chave: Land Economics/Use.
Ano: 2004
URL: http://purl.umn.edu/20206

TARIFF RATE IMPORT QUOTAS, DOMESTIC MARKET STRUCTURE AND AGRICULTURAL SUPPORT PROGRAM: THE CASE OF TAIWANESE RICE IMPORT
Provedor de dados: 31
Autores: Chang,   Hung-Hao; de Gorter,   Harry.
After joining the WTO in 2002, Taiwan allowed rice imports for the first time by implementing an import quota subject to a special safeguard tariff.  In 2003, the import quota was expanded to a two-tier tariff rate import quota system.  Although Taiwan maintained land set-asides and domestic support prices for producer sales to the State Trading Enterprise, the latter was limited to importing only 65 percent of the import quota with the rest sold to private traders.  This sudden transformation of the Taiwanese import regime and rice market along with the government proposal for a "strategic alliance" amongst traders highlights the importance of studying the effects of policy reforms in the framework of imperfect domestic market structure.  The purpose of...
Tipo: Conference Paper or Presentation
Palavras-chave: Tariff rate quota; Strategic alliance; Domestic support; Market structure; Agricultural and Food Policy; International Relations/Trade; Q17; Q18.
Ano: 2004
URL: http://purl.umn.edu/36274

Sources and Effects of Instability in the World Rice Market
Provedor de dados: 31
Autores: Jayne,   Thomas S.
This report reassesses the causal link between domestic agricultural policies and world price instability, using the case of the rice market. Specifically, the report develops a framework for analyzing the effects of domestic policies on international price stability, identifies the conditions required for government policies to destabilize world markets and econometrically examines whether these conditions apply to the trade behavior of seven major rice trading countries over the period 1960-87. This is done by comparing the estimated transmission and absorption effects with those implied under free trade, by incorporating several behavioral restrictions drawn from standard trade theory. Sensitivity analysis is then used to discern how robust the results...
Tipo: Report
Palavras-chave: Crop Production/Industries; Marketing; Downloads June 2008-July 2009: 22.
Ano: 1993
URL: http://purl.umn.edu/54059

THE VALUE OF USDA OUTLOOK INFORMATION: AN INVESTIGATION USING EVENT STUDY ANALYSIS
Provedor de dados: 31
Autores: Irwin,   Scott H.; Good,   Darrel L.; Gomez,   Jennifer K.
The economic value of public situation and outlook information has long been a subject of debate. The purpose of this paper is to investigate the economic value of USDA WASDE reports in corn and soybean markets. The investigation is based on event study analysis, with the "events" consisting of the release of all monthly USDA WASDE reports for corn and soybeans from 1985 through 1998. The WASDE reports during the sample period are divided into two groups: one that represents "pure" outlook information and one that represents a "mix" of situation and outlook information. The statistical tests can be placed into two categories: mean price reaction and volatility reaction. Overall, the results suggest that USDA outlook information has a significant impact in...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Marketing.
Ano: 2001
URL: http://purl.umn.edu/18948

THE ECONOMIC IMPACTS OF PHOSPHORUS-BASED MANURE MANAGEMENT POLICIES ON A REPRESENTATIVE NORTH CENTRAL INDIANA HOG-GRAIN FARM
Provedor de dados: 31
Autores: Yap,   Crystal; Foster,   Kenneth A.; Preckel,   Paul V.; Doering,   Otto C., III.
Federal and State regulatory agencies are considering switching from a nitrogen-based manure disposal policy to one that is phosphorus-based. This analysis estimates the compliance costs of this policy change for a representative hog-grain farm in Wabash County, Indiana. The representative farm includes 1,500 acres of cropland and has the capacity to raise 11,970 grow-finish hogs annually. The farm model also has the potential to produce four different crops  on six different land types. A non-linear math-programming model was developed for this study to determine the optimal mix of management activities for a phosphorus-based regulation. The model maximizes farm returns above variable costs, subject to resource and regulatory constraints. The model allows...
Tipo: Working or Discussion Paper
Palavras-chave: Livestock Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/28642

Who's in the Driver's Seat? Mobile Source Policy in the U.S. Federal System
Provedor de dados: 31
Autores: Harrington,   Winston; McConnell,   Virginia D.; Walls,   Margaret.
Regulation of mobile source emissions in the US has evolved as a complex combination of central government and decentralized authority. The central government required uniform new car emissions standards in the 1970 Clean Air Act, but gave states the power to meet ambient air quality standards however they saw fit, including various regulations on mobile sources. The 1990 Amendments to the Act strengthened the Federal role in some ways, by requiring tighter new car standards and more specific requirements for fuels and for vehicle emissions inspection and maintenance, but at the same time left states with a great deal of latitude to meet ambient standards and took greater recognition of regional variation in environmental problems. We examine the role of...
Tipo: Working or Discussion Paper
Palavras-chave: Mobile source; Federalism; Public Economics; Q25; Q28.
Ano: 1996
URL: http://purl.umn.edu/10636

Adoption of Pollution Prevention: The Role of Information Spillover, Mandatory Regulation, and Voluntary Program Participation
Provedor de dados: 31
Autores: Bi,   Xiang; Deltas,   George; Khanna,   Madhu.
Interest in promoting Pollution Prevention (P2) has been increasing since 1991, following the passage of the Pollution Prevention Act (PPA) of 1990. As part of the PPA, facilities that are subject to the Toxics Releases Inventory (TRI) are required to disclose the number of incremental P2 activities for each listed chemicals from 1991 onward. Though the disclosure is required by the PPA, the adoption of P2 remains a voluntary initiative by firms. To promote P2 ethic among firms, the U.S.EPA has established several voluntary programs and P2 information clearinghouse. P2 technologies were more likely to be facility- and operation- specific and involved considerable information costs and uncertainty. Firms might learn about P2 technologies from their peers...
Tipo: Conference Paper or Presentation
Palavras-chave: Pollution prevention; Toxics Release Inventory (TRI); Voluntary 33/50 program; Information spillover; Environmental Economics and Policy; Q55; C21; L51.
Ano: 2011
URL: http://purl.umn.edu/103741

Water Resources in the Twenty-First Century: Challenges and Implications for Action
Provedor de dados: 31
Autores: Rosegrant,   Mark W.
The defining issues of the twenty-first century may well be the control of water resources. In the next 30 years it is likely that water shortages will increase dramatically. While water supplies are dwindling because of groundwater depletion, waste, and pollution, demand is rising fast.  Currently 338 million people are subject to sometime severe water shortages, and by 2025 this number is projected to jump to about 3 billion. The worsening scarcity of water threatens agricultural growth and industrial production and is likely to increase water-related health problems and degrade the environment. In light of these prospects, water issues have been a central theme of IFPRI’s 2020 Vision initiative, which seeks to develop an international consensus on how...
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 1997
URL: http://purl.umn.edu/42317

CONTROLE DOS OBJETIVOS E METAS ECONÔMICAS E SOCIOAMBIENTAIS NAS EMPRESAS: UM ESTUDO APLICADO NA PRODUÇÃO DE BIOCOMBUSTÍVEIS EM RONDÔNIA
Provedor de dados: 31
Autores: Leite,   Haroldo Cristovam Teixeira; Bacinello,   Edilson.
Este trabalho buscou evidenciar a incompatibilidade existente entre os interesses econômicos em contraponto com os interesses socioambientais acerca da produção de biocombustíveis – biodiesel e etanol – no Estado de Rondônia e qual o auxílio da controladoria neste contexto. O estudo foi conduzido através da pesquisa bibliográfica e de campo onde se procurou subsídios para o assunto em estudo. Com a metodologia colocada na prática, verificou-se que os dados apresentados sugerem a importância da análise dos impactos que poderão ocorrer com a implantação dessas atividades em Rondônia, cabendo as empresas desenvolverem Sistemas de Controle e Avaliação no sentido de viabilizá-las nas áreas econômica e socioambiental. Para o desenvolvimento da pesquisa,...
Tipo: Conference Paper or Presentation
Palavras-chave: Objetivos Econômicos; Objetivos Socioambientais; Controladoria; Biocombustíveis e Sustentabilidade; Economic objectives; Social and environment objectives; Controllership Production of the Biofuels; Enterprise-ambient coherence; Agribusiness; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108076

A emergência da categoria “agricultor familiar” como sujeito de direitos na trajetória do sindicalismo rural brasileiro
Provedor de dados: 31
Autores: Picolotto,   Everton Lazzaretti.
O processo de reconhecimento dos agricultores familiares como sujeitos de direitos apesar de ser recente quando pensado a partir da trajetória do sindicalismo rural brasileiro demonstra ter suas primeiras raízes ainda na constituição da legislação trabalhista-sindical dos anos de 1930. Visando explorar esse processo o artigo tem por objetivo analisar a emergência dos agricultores familiares como sujeitos de direitos na sociedade brasileira contemporânea. Analisa-se os processos de formação do sindicalismo rural e de expansão da legislação trabalhista para os trabalhadores rurais como forma de realização de uma “cidadania regulada” até a década de 1970; o questionamento do sindicalismo oficial, a estruturação de um “novo sindicalismo” e a emergência de...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultura familiar; Sujeitos de direitos; Sindicalismo dos trabalhadores rurais; Sindicalismo da agricultura familiar; Cidadania; Family agriculture; Individuals with rights; The rural workers' syndicalism; Syndicalism of the family agriculture; Citizenship; Farm Management.
Ano: 2008
URL: http://purl.umn.edu/108074

DOES THE PRODUCER HAVE AN INCENTIVE TO SELL FED CATTLE ON A GRID?
Provedor de dados: 31
Autores: Fausti,   Scott W.; Qasmi,   Bashir A.
Barriers to the adoption of grid pricing by fed cattle producers are investigated over a 206-week period (January 1997 to December 2000).  The empirical findings document the following potential barriers to adoption: (1) when fed cattle are evaluated on a grid pricing system versus a dressed weight pricing system, a price differential per cwt. and a per-head revenue differential exists over time, (2) the price differential per cwt. is subject to seasonal variation, resulting in variability in the monetary incentive to market-fed cattle on a grid relative to selling cattle at an average price, and (3) the variability in per-head grid revenue is consistently higher than per-head dressed weight revenue variability over time.   The marketing implications for...
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries; Marketing.
Ano: 2002
URL: http://purl.umn.edu/34581

Predicting Effort and Protected Species Bycatch Under an Effort Limit or Take Caps
Provedor de dados: 31
Autores: Stohs,   Stephen M.
Many production processes feature joint production of a desirable output with an undesirable byproduct.  Producers and consumers of the desirable output mutually benefit at the expense of non-consumers, who bear external damage costs imposed by production of the undesirable byproduct.  A standard approach to regulating such production activities is through the combination of a limit on allowable production effort in conjunction with a cap on the level of the undesirable output.  The situation is greatly complicated when the production externality is a random function which depends on the level of production effort.  In this case, capping undesirable output induces a random limit on the level of the production effort, assuming further production is...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6570

Pigeonpea improvement
Provedor de dados: 31
Autores: Ryan,   James G.
This study was commissioned by the Australian Centre for International Agricultural Research (ACIAR) to evaluate the economic impact of two projects (8201 and 8567) for which ACIAR provided support from 1982–89. These projects were aimed at the improvement of the grain yield potential of pigeonpea (Cajanus cajan) using modern plant breeding, along with associated physiological, agronomic, processing and socioeconomic research. The commissioned organisation in Australia was the University of Queensland. The partners were: Fiji (Ministry of Primary Industries, Native Land Development Corporation); Indonesia (Central Research Institute for Food Crops, Agency for Agricultural Research and Development); India (Indian Council for Agricultural Research,...
Tipo: Book
Palavras-chave: Pigeonpea; ACIAR; Economic impact; Yield; Plant breeding; Fiji; Indonesia; India; Thailand; Australia; Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Development; Production Economics.
Ano: 1998
URL: http://purl.umn.edu/47498

Taking a New Look at Empirical Models of Adoption: Average Treatment Effect Estimation of Adoption Rates and their Determinants
Provedor de dados: 31
Autores: Diagne,   Aliou.
This paper shows that the observed sample adoption rate does not consistently estimate the population adoption rate even if the sample is random. It is proved that instead the sample adoption rate is a consistent estimate of the population joint exposure and adoption rate, which does not inform about adoption per se. Likewise, it is shown that a model of adoption with observed adoption outcome as dependent variable and where exposure to the technology is not observed and controlled for cannot yield consistent estimates of the determinants of adoption. Such model can at best provide consistent estimates of the effects of the included explanatory variables on joint exposure and adoption. Even for that to be possible, the model must be explicitly specified as...
Tipo: Conference Paper or Presentation
Palavras-chave: Technology Adoption; Rice; NERICA; West Africa; Average Treatment Effect; Research and Development/Tech Change/Emerging Technologies; C8; O3; Q12; Q16; Q55.
Ano: 2006
URL: http://purl.umn.edu/25623

SUPERVISION AND TRANSACTION COSTS:  EVIDENCE FROM RICE FARMS IN BICOL, THE PHILIPPINES
Provedor de dados: 31
Autores: Evenson,   Robert E.; Kimhi,   Ayal; Desilva,   Sanjaya.
Labor markets in all economies are subject to transaction costs associated with recruiting, monitoring and supervising workers.  The level of transaction costs affects labor and land contract choices and family labor advantages.  Rural labor markets in developing economies, where institutions such as labor and contract law and formal employment assistance mechanisms are not in place, are regarded to be particularly sensitive to transaction cost conditions.  A number of studies of contract choice support this contention.  The inherent difficulty of measuring transaction costs, however, has limited studies on this topic. In this paper, we analyze supervision activities reported in a cross-section survey of rice farmers in the Bicol region of the Philippines....
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/21788

Analyzing of Special Hungarian Micro-Regions from the Point of View of a New Rural Category
Provedor de dados: 31
Autores: Ritter,   Krisztian.
There is no universally accepted definition of the category of "rural area" in Hungary and this issue is the subject of controversy. The EU or OECD standards cannot be fully applied due to unique national characteristics. As a) the role of agriculture in the national economy has drastically decreased in the last 15 years in Hungary - due to the political transition and globalisation, and as b) this decreasing importance causes heavy and pressing problems, especially in agricultural and ex-agricultural areas and regions, job loss is a characteristic sign of the underprivileged areas, and that affects mainly the villages and rural people who have lost their jobs in the agricultural sector.  Main goal of the author's Ph.D. research is an analysis of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural employment; EU; Job loss; Rural area; Rural development; Community/Rural/Urban Development; Q19.
Ano: 2005
URL: http://purl.umn.edu/24448

Adoption and diffusion of no tillage practices in Southern Spain olive groves
Provedor de dados: 31
Autores: Franco,   Juan Agustin; Calatrava-Requena,   Javier.
This paper analyses the process of adoption of no tillage in South-eastern Spain’s olive groves. Olive tree groves in South-eastern Spain’s mountainous areas are subject to a high risk of soil erosion, which is the main environmental problem for this crop, and have to incur in high costs of soil conservation. This results in a greater difficulty to comply with the practices required to benefit from both the single payment and agri-environmental schemes. In many high-steeped areas, farmers have opted for non-tillage practices as an alternative to other conservation practices. Using our own data from a survey carried out in 2006 among 215 olive tree farmers from the Granada Province in Southern Spain regarding the adoption of soil conservation and management...
Tipo: Conference Paper or Presentation
Palavras-chave: Spanish olive groves; Soil erosion; No tillage; Crop Production/Industries; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/44014

EIGENTUMSVERHÄLTNISSE, RENTABILITÄT UND SCHULDEN LANDWIRTSCHAFTLICHER GROßBETRIEBE IM GEBIET WOLGOGRAD
Provedor de dados: 31
Autores: Schulze,   Eberhard; Tillack,   Peter; Gerasin,   Sergej.
Discussion Paper 32 contains information on property relations and profitability of 100 Russian large-scale farm enterprises, gathered in interviews in the Volgograd region in 2000. They are an integrated part of research activities concerning the privatisation and restructuring of farm enterprises in Central and Eastern Europe and take up the subject of Discussion Paper 18. 31 questions were formulated. The answers were evaluated using multivariate statistical methods. Comprehensive knowledge was obtained about number and size of land and capital shares, voting mode, indebtedness, cost of social security contributions for the employees and of the support for household plots and ensuing consequences for the profitability of enterprises. Within a farm, land...
Tipo: Working or Discussion Paper
Palavras-chave: Large-scale farms; Land ownership; Vote mode; Profitability; Debts; Agricultural Finance; Farm Management; 0013; 0047.
Ano: 2001
URL: http://purl.umn.edu/14901

Environmental and social values of river water: examples from the Menik Ganga, Sri Lanka.
Provedor de dados: 31
Autores: Dissanayake,   Priyanka; Smakhtin,   Vladimir U.
Many decisions on water allocation in river basins are made on economic grounds. Environmental and social benefits of water should also be considered in river basin management, and attempts should be made to value them similarly. This is not a straightforward task and very few studies have directly addressed this issue to date. In this paper, the Menik Ganga (River) in southern Sri Lanka is used as a case study to attempt and evaluate the costs and benefits of environmental water allocations, referred to as ‘environmental flows’ (EF). In this study, a broad definition of EF is used: the components of EF evaluated include the requirements of the religious festival, the requirements of the Yala National Park, the requirements of the Pilinnawa Coastal Wetland...
Tipo: Working or Discussion Paper
Palavras-chave: Rivers; Ecosystems; Wetlands; Wildlife; Fisheries; Water allocation; Water requirements; Case studies; Economic evaluation; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/91876

Problems in Rural Public Service and its Countermeasures: Investigation on Rural Areas of Ningxia Hui Autonomous Region China
Provedor de dados: 31
Autores: Luo,   Qiangqiang; Wang,   Junli.
Under the condition of market economy, market competition has shown unprecedented pressure on agricultural producers with family as a production unit. Agricultural producers are at a relatively weak position. Agricultural production having the characteristics of small scale can hardly adapt to market competition effectively and agricultural production is facing a huge market risk. Therefore, farmers urgently need a wide range of public services. In March, 2007, the Ministry of Finance and Huazhong Normal University investigated a total of 1000 residents in 35 sample villages, belonging to 33 towns of Ningxia Hui Autonomous Region, China. Status of the supply of public services in rural areas is introduced from three aspects, which are backward service of...
Tipo: Thesis or Dissertation
Palavras-chave: Ningxia Hui Autonomous Region of China; Rural residents; Rural public service; Community/Rural/Urban Development.
Ano: 2009
URL: http://purl.umn.edu/56251

Fiscal policy consistency and implications for macroeconomic aggregates: the case of Uganda
Provedor de dados: 31
Autores: Hisali,   Eria.
The relationship between growth in monetary aggregates and price changes continues to be a subject of considerable debate both in the academic and policy circles. Whereas the more ‘conservative’ policy makers hold that growth in monetary aggregates bear proportionately on prices, ‘liberals’ on the other hand suggest a fairly weak relationship and instead mainly attribute sustained price changes to other innovations (including structural weaknesses and poor productive capacity). This study employed vector autoregression techniques (and its variants) to examine both short term as well as long term interactions between selected macroeconomic aggregates with particular focus on the relationship between money growth and price changes. Results from both the...
Tipo: Report
Palavras-chave: Fiscal stance; Macroeconomic aggregates; Structural vector autogression; Budget accounting approach; EPRC; Agricultural Finance; Financial Economics; Labor and Human Capital; Production Economics; Productivity Analysis; H62; H63; H69.
Ano: 2010
URL: http://purl.umn.edu/102489

Methods of Change and Financial Performance of Dairy Farms Before and After a Switch to Management Intensive Grazing
Provedor de dados: 31
Autores: Taylor,   Philip Eugene.
Interest in Management Intensive Grazing (MIG) of dairy cattle has increased during the last 2 decades. Most dairy producers utilizing MIG were former confinement or non-intensive pasture operations while the others started their operation with MIG. While research publications tout the financial and other benefits of MIG, often comparing them to non-MIG dairies, and anecdotal evidence in popular farm press has shown MIG in a favorable light, comparing a MIG dairy farm to itself before and after the management switch has not been a subject of research scrutiny. Knowing the potential impact of a switch to MIG prior to making a management decision to do so would be a significant piece of information for a dairy farm to understand if contemplating such a...
Tipo: Thesis or Dissertation
Palavras-chave: Dairy; Grazing; Economics; Pasture; Management; Farm; Farm Management; Livestock Production/Industries; Production Economics; Q10; Q12; Q19.
Ano: 2009
URL: http://purl.umn.edu/56008

THE EVOLUTION OF LEGAL INSTITUTIONS WITHOUT EFFICIENCY: THE CASE OF ZONING
Provedor de dados: 31
Autores: Walker,   William D.
This paper argues that law and economics has not come to grips with Arrow's limitation on social welfare economics nor with the evolutionary character of economic and legal institutions. Arrow's theorem makes the concept of a socially efficient economic institution dependent on a prior allocation of property rights. A socially efficient result is efficient only within the bounds of the initial allocation of property rights. A differing initial allocation would have resulted in a different efficient result. The participants in economic and legal systems are aware of this fact. They see that their positions can be improved both by market trades and by adjustments to property rights. This fact is the engine by which evolutionary law and economic change...
Tipo: Thesis or Dissertation
Palavras-chave: Institutional and Behavioral Economics; Land Economics/Use.
Ano: 1997
URL: http://purl.umn.edu/11159

Ownership structures, profitability and debts of agricultural large firms in the Volgograd region
Provedor de dados: 31
Autores: Schulze,   Eberhard; Tillack,   Peter; Gerasin,   Sergej.
Discussion Paper 34 contains information on property relations and profitability of 100 Russian large-scale farm enterprises, gathered in interviews in the Volgograd region in 2000. They are an integrated part of research activities concerning the privatisation and restructuring of farm enterprises in Central and Eastern Europe and take up the subject of Discussion Paper 18. 31 questions were formulated. The answers were evaluated using multivariate statistical methods. Comprehensive knowledge was obtained about number and size of land and capital shares, voting mode, indebtedness, cost of social security contributions for the employees and of the support for household plots and ensuing consequences for the profitability of enterprises. Within a farm, land...
Tipo: Working or Discussion Paper
Palavras-chave: Large-scale Farms; Land Ownership; Vote mode; Profitability; Debts; Landwirtschaftliche Großbetriebe; Bodeneigentum; Abstimmungsmodus; Rentabilität; Schulden; Сельскохозяйственные крупные предприятия; Собственность на землю; Рентабельность; Задолженность.; Agribusiness; Agricultural Finance; Farm Management; Industrial Organization; Land Economics/Use; Productivity Analysis; O 013; O 047.
Ano: 2001
URL: http://purl.umn.edu/92172

An economic analysis of options for utilising additional land on a high rainfall Gippsland dairy farm
Provedor de dados: 31
Autores: Tarrant,   Katherine A.; Armstrong,   Dan P.; Ho,   Christie K.M.; Wales,   W.J.; Malcolm,   Bill.
A range of options for utilising additional land on a dairy farm in the high rainfall area of Gippsland were analysed. The aim was to determine if additional land may assist the owners/operators in maintaining or increasing profit in the medium term (5-10 years). Historical trends have been towards fewer, larger, more intensive enterprises, and this project studies the value of additional land in continuing or altering this trend. A case study farm and spreadsheet modelling approach was used to examine these issues. Five different uses for additional land were identified by an expert steering committee, and were compared to the base farm system over a 10-year development period. The results suggest that expanding the milking area by purchasing additional...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2010
URL: http://purl.umn.edu/59164

Socioeconomic Analysis of the Roles of Agriculture in Morocco
Provedor de dados: 31
Autores: Moussoui,   Mohamed.
The study conducted in morocco, within FAO/ROA project, showed that agriculture, while being affected by exogenous natural conditions and macroeconomic factors, contributes significantly to environmental amenities, poverty alleviation, social viability and national culture. The analysis of environmental roles showed an asymmetry of information in favor of negative externalities. However, agriculture provides positive externalities as demonstrated through the economic evaluation of three cases concerning landscape beautification, agro tourism and animal biodiversity conservation. Poverty has been exacerbated in depth, volume and severity and remains a rural phenomenon with a visible concentration in areas characterized by limited land endowments, low...
Tipo: Conference Paper or Presentation
Palavras-chave: International Development.
Ano: 2005
URL: http://purl.umn.edu/9523

The Profitability of Technical Analysis: A Review
Provedor de dados: 31
Autores: Park,   Cheol-Ho; Irwin,   Scott H.
The purpose of this report is to review the evidence on the profitability of technical analysis. To achieve this purpose, the report comprehensively reviews survey, theoretical and empirical studies regarding technical trading strategies. We begin by overviewing survey studies that have directly investigated market participants’ experience and views on technical analysis. The survey literature indicates that technical analysis has been widely used by market participants in futures markets and foreign exchange markets, and that about 30% to 40% of practitioners appear to believe that technical analysis is an important factor in determining price movement at shorter time horizons up to 6 months. Then we provide an overview of theoretical models that include...
Tipo: Report
Palavras-chave: Agricultural Finance.
Ano: 2004
URL: http://purl.umn.edu/37487

Farm Investments: Alternative Ownership Structures that Address the Liquidity versus Profitability Conundrum
Provedor de dados: 31
Autores: Shadbolt,   Nicola M.; Gardner,   John W.G.
Investing in farmland is fraught with conflicting signals. Oltmans (2001) concludes that while investing in land may generally be profitable it is seldom, if ever, feasible on a cash flow basis. He argues that the non-depreciable nature of land and long-term capital gains are incompatible with the capital recovery terms sought by investors and lenders. He also notes that literature on this subject tends to focus on either the returns (profitability) or the cash flow (feasibility) but not on both simultaneously. To assist in the debate it is helpful to split the farm into two businesses that are often, but not necessarily, linked - the property business, where success is measured by changes in asset values over time and is driven by smart purchase and sale...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2003
URL: http://purl.umn.edu/24362

Public regulation of R&amp;D racings
Provedor de dados: 31
Autores: Bontems,   Philippe; Vercammen,   James.
The purpose of the paper is to theoretically examine the welfare implications of public sector involvement in agricultural biotechnology R&amp;D. The model assumes that firms (either a private duopoly consisting of a pair of for-profit firms or a mixed duopoly consisting of one for-profit firm and one public firm) compete in a winner-take-all patent race that is subject to R&amp;D spillovers. Unlike previous research, spillovers are explicitly incorporated into the race, and the size of the prize that accrues to the winner, as well as the size of the ex post social surplus, is contingent on whether or not the public firm participates in the stage two product market. The welfare results concerning the implication of public sector involvement in the R&amp;D...
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/21367

PROGRAMA DE ACELERAÇÃO DO CRESCIMENTO: UMA ANÁLISE SOBRE A CONSTRUÇÃO DE HIDRELÉTRICAS NA REGIÃO DA AMAZÔNIA LEGAL
Provedor de dados: 31
Autores: Medeiros,   Natalino Henrique; Ferrario,   Marcela Nogueira; Teixeira,   Anderson Mutter.
O objetivo deste artigo é o de coletar e agregar dados e informações econômicas e sociais sobre a região da Amazônia Legal, de forma a auxiliar na análise sobre a proposta de implantação de usinas hidrelétricas previstas no Plano de Aceleração do Crescimento (PAC). A fundamentação teórica se baseia na estrutura econômica que demanda o consumo cada vez maior de energia com fins econômicos. Este artigo possui uma metodologia analítica, na busca pela análise sobre os impactos ambientais gerados pela implantação de hidrelétricas na região da Amazônia Legal. As conclusões estão abertas, pois são baseadas em questões amplas sobre o conceito e a viabilidades dos impactos ambientais na busca pelo crescimento econômico e apaziguamento das diferenças regionais....
Tipo: Conference Paper or Presentation
Palavras-chave: Usinas Hidrelétricas; Plano de Aceleração do Crescimento e Impacto Ambiental; Hydroelectric power station; Plan of Acceleration of Growth and environmental impacts; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/117268

Competition Regimes in Telecommunications and the International Trading System
Provedor de dados: 31
Autores: Koopmann,   Georg.
In most countries, competition in the telecommunications industry is subject to both sector-specific regulation and more general antitrust policies. At the same time, a process of international market liberalisation is under way in telecommunications which can only be truly effective - and further advance - if appropriate competitive safeguards are in place. Trading partners should agree on certain minimum standards to be observed in this area in order to better combat anticompetitive conduct and avoid international conflicts. The Reference Paper to the WTO Agreement on Basic Telecommunications is an important step in this direction and may also serve as a model for other network industries. It is a framework of rules which has to be filled with concrete...
Tipo: Working or Discussion Paper
Palavras-chave: Regulation; Antitrust; Trade Negotiations; Services; International Relations/Trade; F13; L40; L50; L89.
Ano: 2001
URL: http://purl.umn.edu/26230

Why Differences Make a Difference: Traditional Food Chain Performance in Selected European Countries
Provedor de dados: 31
Autores: Molnar,   Adrienn; Gellynck,   Xavier; Weaver,   Robert D.
Organizations no longer compete as independent entities, but as chains (Christopher 1998; Cox 1999; Lambert and Cooper 2000), and these organizations more and more realize the performance potential of chains (Pearson and Samali 2005; Gellynck, Vermeire and Viaene 2006). Being part of a well‐performing chain generates important performance benefits for the individual organization (Zhenxin, Hong and Edwin 2001). As a result, there is increasing interest in the performance of chains as a research subject (Beamon 1998). A vast group of authors (Neely, Mills, Platts, Gregory and Richards 1994; Neely, Gregory and Platts 1995; Beamon 1998; Christopher 1998; Beamon 1999; Li and O'Brien 1999; Van der Vorst 2000; Gunasekaran, Patel and Tirtiroglu 2001; Lambert and...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics; Research Methods/ Statistical Methods.
Ano: 2010
URL: http://purl.umn.edu/100508

The Effect of Different Levels of Lentil by Product on Growth Performance, Carcass Traits and Egg Yield in Quail (Coturnix Coturnix Japonica)
Provedor de dados: 89
Autores: Ayaşan,T; Sogut,B; Inci,H.
ABSTRACT The subject of this study was to evaluate the effects of lentil byproduct (LP) on growth performance, carcass traits and egg yield of quail (Coturnix coturnix Japonica). To achieve this goal, a total of 600 0-day-old quail chicks were used. The birds were divided into 5 groups with 3 replicates. The 1st, 2nd, 3rd, 4th and 5th groups received 0, 5, 10, 15 and 20% lentil byproduct, respectively. All the diets were prepared as isonitrogenous and isocaloric. As a result of this study, the highest live body weights of quails as Laudadio mixed gender were observed in the 3rd (195.5 g) and 5th (195.3 g) groups at the end of the study, however the differences between the control and treatment groups were not significant (p&gt;0.05). Similar results were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass; Egg production; Fattening; Lentil byproduct; Quail; Yolk color.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400773

The Effect of Lentil-By Product on Growth Performance and Carcass Traits of Heavy White Turkeys
Provedor de dados: 89
Autores: Söğüt,B; Kurbal,ÖF; İnci,H; Ayaşan,T.
ABSTRACT The subject of this study was to figure out the effects of lentil by product (LP) on growth performance and carcass traits of the white heavy turkeys. To accomplish this goal, a total of 210 day old big-6 turkey chicks were used. The birds were divided into 7 seven groups with 3 replicates. The 1st, 2nd, 3rd, 4th, 5th, 6th and 7th groups received 0, 5, 10, 15, 20, 25 and 30 % lentil by product, respectively. All the diets were made as izonitrojenic and izocaloric. The highest live body weights of males and females were observed in the control group at the end of the 15th week, which was the time of slaughtering of females, however the differences between the control and the 2nd, 3rd and 4th groups were not significant (p&gt;0.05). The same...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lentil byproduct; Turkey; Fattening performance.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000200357

Chelated minerals for poultry
Provedor de dados: 89
Autores: Vieira,SL.
Organic minerals have been subject of an increasing number of investigations recently. These compounds can be considered the most significant event regarding commercial forms of minerals targeting animal supplementation in the last decades. Minerals, especially metals, are usually supplemented in poultry feeds using cheap saline sources and have never required a lot of attention in terms of quality. On the other hand, definitions of organic minerals are very broad and frequently lead to confusion when decision-making becomes necessary. Organic minerals include any mineral bound to organic compounds, regardless of the type of existing bond between mineral and organic molecules. Proteins and carbohydrates are the most frequent candidates in organic mineral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Chelated mineral; Organic mineral; Poultry.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200001

Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil
Provedor de dados: 90
Autores: Moraes,Moacir Tuzzin de; Silva,Vanderlei Rodrigues da; Cherubin,Maurício Roberto; Carlesso,Reimar; Debiasi,Henrique; Levien,Renato.
The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do Sul, Brazil, in the 2009/2010 and 2010/2011 growing seasons. The experiment was arranged in a 2 × 6 (seasons and fertilization) factorial in a randomized complete block design with four replications. The factor time consisted of two growing seasons (sunflower in 2009/10 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Aggregate stability; Total nitrogen; Soil structure; Organic manure.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400028

Genesis and Classification of Nitisols from Volcano-Sedimentary Lithology in Northeastern Brazil
Provedor de dados: 90
Autores: Costa,Edivan Uchôa Cavalcanti da; Araujo,Jane Kelly Silva; Neves,Laércio Vieira de Melo Wanderley; Araújo Filho,José Coelho de; Sousa,Juliet Emília Santos de; Corrêa,Marcelo Metri; Ribeiro Filho,Mateus Rosas; Souza Júnior,Valdomiro Severino de.
ABSTRACT On the southern coast of Pernambuco State (PE), Brazil, lithotypes of the Cabo Basin (volcanic and sedimentary rocks), in association with the relief, allow the determination of the dynamics of the formation of Nitossolos Háplicos (Nitisols), including those with high levels of exchangeable aluminum. The objective of this study was to evaluate the influence of lithological diversity (basalt and sedimentary siliciclastic rocks) on the morphological, physical, chemical, and mineralogical properties of Nitossolos Háplicos along a slope (P1-summit, P2-backslope, P3-footslope) on the southern coast of PE, in order to consider its genesis and the relation of soil properties to adjacent environments and to evaluate its framing within the Brazilian Soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Smectites; Alitic soils; Nitossolo Háplico; Nitisols Ferritic.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100300

Agronomic performance of canola submitted to desiccation with herbicides at different maturation stages
Provedor de dados: 91
Autores: Rosa,Willian B.; Duarte Júnior,José B.; Perego,Ivonei; Almeida,Bruno H. de; Costa,Antonio C. T. da; Tomm,Gilberto O.
ABSTRACT Uneven maturation in canola is an important challenge for its management in regions subject to frost and high rainfall at the end of the cycle. In order to identify practices to maximize grain yield under these growing conditions, this work evaluated the effects of desiccation with herbicides at different phenological stages on Hyola 433, one of the most commonly used hybrids in Brazil. The experiment was conducted in a randomized block design with four repetitions in a 6 x 4 factorial scheme, with five herbicides: paraquat, diquat and ammonium glufosinate at dose of 400 g a.i. ha-1, glyphosate at 1,440 g a.i. ha-1 and saflufenacil at 70 g a.i. ha-1, plus the control, at four phenological stages of silique maturation (G2, G3, G4 and G5)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Harvest antecipation; Grain yield; Oil content.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600419

Potential risk of drift from inclined fan nozzles
Provedor de dados: 91
Autores: Moraes,Eder D. de; Saab,Otávio J. G. A.; Gandolfo,Marco A.; Marubayashi,Rodrigo Y. P.; Gandolfo,Ulisses D.
ABSTRACT Pest, disease and weed control in large-scale crops depend on the application of agrochemicals. These applications are subject to several factors that can lead to drift. The objective of this study was to evaluate the effect of spray nozzles with inclined flat jet, on the drift. The drift was collected in a 10 m wind tunnel, with a spray system inside. The samples were collected in 5 horizontal points, from 2.0 to 6.0 m away from the spray nozzle and 5 points in the vertical, from 0.1 to 0.5 m away from the lower base of the wind tunnel, totaling 25 sample points. The mixture applied was glyphosate (isopropylamine salt, 1080 g a.e. ha-1) with 2,4-D (dimethylamine salt, 1.005 g a.e. ha-1). The nozzles J3D 100 025, JGC 120 02, JAP 110 015 and ADI...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wind tunnel; Environmental contamination; Phytosanitary control; J3D.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300229

Constant fluctuating asymmetry but not directional asymmetry along the geographic distribution of Drosophila antonietae (Diptera, Drosophilidae)
Provedor de dados: 92
Autores: Costa,Marcelo; Mateus,Rogério P.; Moura,Mauricio O.
ABSTRACT The population dynamics of a species tends to change from the core to the periphery of its distribution. Therefore, one could expect peripheral populations to be subject to a higher level of stress than more central populations (the center–periphery hypothesis) and consequently should present a higher level of fluctuating asymmetry. To test these predictions we study asymmetry in wing shape of five populations of Drosophila antonietae collected throughout the distribution of the species using fluctuating asymmetry as a proxy for developmental instability. More specifically, we addressed the following questions: (1) what types of asymmetry occur in populations of D. antonietae? (2) Does the level of fluctuating asymmetry vary among populations? (3)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Developmental instability; Generalized Procrustes Analysis; Geographical variation; Geometric morphometrics; Shape.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000400337

INCLUDING RISK IN ECONOMIC FEASIBILITY ANALYSIS:A STOCHASTIC SIMULATION MODEL FOR BLUEBERRY INVESTMENT DECISIONS IN CHILE
Provedor de dados: 94
Autores: LOBOS,GERMÁN; MORA,MARCOS; SAENS,RODRIGO; MUÑOZ,TRISTÁN; SCHNETTLER,BERTA.
ABSTRACT  The traditional method of net present value (NPV) to analyze the economic profitability of an investment (based on a deterministic approach) does not adequately represent the implicit risk associated with different but correlated input variables. Using a stochastic simulation approach for evaluating the profitability of blueberry (Vaccinium corymbosum L.) production in Chile, the objective of this study is to illustrate the complexity of including risk in economic feasibility analysis when the project is subject to several but correlated risks. The results of the simulation analysis suggest that the non-inclusion of the intratemporal correlation between input variables underestimate the risk associated with investment decisions. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Random values; Value at risk; Probabilistic forecasts.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452015000400870

Modified atmosphere packaging extending the storage life of 'douradão' peach
Provedor de dados: 94
Autores: Santana,Ligia Regina Radomille de; Benedetti,Benedito Carlos; Sigrist,José Maria Monteiro; Sarantopóulos,Claire Isabel Grígoli de Luca.
'Douradão' peach is a perishable product and when cold stored is subject to chilling injury. The objective of the experiment was to evaluate the effect of modified atmosphere packaging (MAP) and cold storage on quality and storage life of these peaches. Fruits were packed in polypropylene (PP) trays and placed inside low density polyethylene (LDPE) bags (30, 50, 60, 75 μm thickness) with active modified atmosphere (10 kPa CO2 + 1.5kPa O2, balance N2). The control was made with peaches held in nonwrapped PP trays. Fruits were kept at 1 ± 1 °C and 90 ± 5% relative humidity (RH) for 28 days and CO2 and O2 within packages was monitored every two days. After 14, 21 and 28 days, samples were withdrawn from MAP and kept in air at 25 ± 1 °C and 90 ± 5% RH for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prunus persica; LDPE; Chilling injury; Woolliness; Storage life.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452010000400009

Population ecology of small rodents and marsupials in a semi-deciduous tropical forest of the southeast Pantanal, Brazil
Provedor de dados: 103
Autores: Andreazzi,Cecilia S. de; Rademaker,Vitor; Gentile,Rosana; Herrera,Heitor M.; Jansen,Ana M.; D'Andrea,Paulo S.
The Pantanal is a South American biome characterized by extensive plains and stark environmental seasonality. Several habitats are subject to annual flooding, forcing small mammal species to aggregate in dry forest patches, which most likely influences their population dynamics and life history strategies. In order to investigate the seasonal influence on the life history traits of these small mammals, we conducted a 2-year mark-recapture study in the southeastern region of the Brazilian Pantanal (Nhecolândia) and analyzed the population dynamics of the most abundant small mammal species with the jackknife estimator. A trapping effort of 21,560 trap-nights resulted in 615 individuals in 1,171 captures (success = 5.43%). Three species of rodents - Oecomys...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gracilinanus agilis; Oecomys mamorae; Population dynamics; Seasonality; Small mammal; Thrichomys pachyurus.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600009

Alternatives for methane emission mitigation in livestock systems
Provedor de dados: 96
Autores: Lascano,Carlos E.; Cárdenas,Edgar.
Human activities are contributing to Global Climate Change through the production of Green House Gases (GHG), which result in increased air, land and ocean temperatures and extreme changes in precipitation in regions of low and high rainfall. The most important GHG's are carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). It is estimated that 18 % of the annual GHG emissions come from different types of livestock and that 37% of CH4, with higher global warming potential (23) relative to CO2 (1), comes from fermentation processes in ruminants. It is possible that in the future beef and milk exports from producing countries is subject to bans if cattle systems do not comply with measures to reduce GHG. There are several alternatives available and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate change; Defaunation; Feed chemical additives; Genetic transformation of bacteria; Greenhouse gases; Immunization; Saponins; Tannins.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300020

Using actual and ultrasound carcass information in beef genetic evaluation programs
Provedor de dados: 96
Autores: Bertrand,Joseph Keith.
Increased movement toward alliances and grid pricing in the U.S. has led to an increase interest in genetic values for carcass traits. The literature suggests that carcass genetic values are an effective tool to enhance selection for carcass traits, and that it is possible to select sires within a breed that can increase marbling score without adversely affecting external fat thickness or percent retail product relative to the breed mean. Ultrasound has been investigated as a cheaper means of collecting carcass information. The literature indicates that carcass traits measured via ultrasound on yearling seedstock will respond to selection. Although the literature is variable on the subject, there are reported genetic correlation (r g) estimates between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef carcass traits; Genetic evaluation; Multi-breed models; Ultrasound.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300007

Fire effects on a Spartina densiflora salt marsh in the floodplain of the Paraná River, Argentina
Provedor de dados: 97
Autores: MADANES,NORA; FISCHER,SYLVIA; VICARI,RICARDO.
We studied the effects of fire on the structural attributes of a Spartina densiflora salt marsh. The study was carried out from November 1995, spring (N95S) to December 1996, late spring (D96LS). In November 1995, we installed 37 permanent plots. In January 1996, 32 of the plots were accidentally burned (B) and the remaining were not burned (NB). Vegetation on each plot was sampled seasonally, plant species were identified and cover-abundance was estimated. We analyzed and compared seasonal variations in plant species richness, diversity, composition and cover-abundance in burned and non-burned plots. In addition, we analyzed variations in biological types (forbs, graminoids) and types of life cycles (annuals, perennials) in B and NB plots before and after...
Tipo: Journal article
Palavras-chave: Spartina densiflora; Salt-marsh; Fire; Community.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000200005

Arbuscular mycorrhizal fungi associated with the rhizosphere of seedlings and mature trees of Swietenia macrophylla (Magnoliophyta: Meliaceae) in Los Tuxtlas, Veracruz, Mexico
Provedor de dados: 97
Autores: Rodríguez-Morelos,Víctor H; Soto-Estrada,Alejandra; Pérez-Moreno,Jesús; Franco-Ramírez,Alicia; Díaz-Rivera,Pablo.
BACKGROUND: Big-leaf mahogany (Swietenia macrophylla King) is the woody species with the highest economic value in Latin America. Currently, it is subject to intensive exploitation, diminishing its natural populations. Due to this decline, the species is a preferred species for reforestation and establishment of commercial tropical plantations. Mycorrhizal symbiosis is a biotic factor scarcely studied in the ecology of this species. Therefore, the objective of this research was to identify the diversity of arbuscular mycorrhizal fungi (AMF) species associated with the rhizosphere of seedlings and mature trees of big-leaf mahogany growing in its natural habitat, a tropical rain forest in Los Tuxtlas, Veracruz, Mexico. Soil samples from a 20-cm depth were...
Tipo: Journal article
Palavras-chave: Arbuscular mycorrhizae; Morphospecies; Seedlings; Spores; Tropical trees.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100009

Cross tolerance by heat and water stress at germination of common beans
Provedor de dados: 22
Autores: Lima, Julliane Destro de; Dedido, Diego Baraldi; Volpato, Leandro Alonso; Silva, Arnaldo Paulo da; Lima, Gustavo Oliveira; Pinheiro, Cássia Renata; Silva, Glacy Jaqueline da.
Common beans are legumes of extreme importance for the food security of developing countries. Because it is widely cultivated in tropical and subtropical regions, it is subject to the stress effects caused by this type of climate, such as water stress and heat. Cross-tolerance allows plants to acclimate to a range of different stresses after exposure to a specific short-term stress. The present work had as objective to evaluate the induction of cross-tolerance by heat stress at 38ºC and water stress simulated by polyethylene glycol (PEG) in 3 different osmotic potentials in the germination of the brazilian cultivars IPR Uirapuru and IPR Campos Gerais in a randomized block design, setting up a 2 x 2 x 3 factorial scheme, with eight replicates of 25 seeds....
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/20603

Nutrition and NPK fertilization to physic nut in Brazil
Provedor de dados: 22
Autores: Freiberger, Mariângela Brito; Guerrini, Iraê Amaral; Castoldi, Gustavo.
The physic nut (Jatropha curcas L.) is a promising oilseeds species for fuel purposes and is attracting great interest from researchers and farmers who aim to produce biodiesel. This is due to the long production cycle and quality of oil produced by physic nut, among other factors. The commercial crop of physic nut in Brazil has been little studied, but the country possesses many qualities to lead the physic nut production, especially by incorporation of areas without competing with food production. However, the research results with the culture in Brazil are still incipient and preliminary, especially with regard to the fertilizer recommendation and nutritional demands. Based on the fact that any information related to this subject is very useful to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas L.; Demanda nutricional; Produtividade.
Ano: 2013
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/5179

Soft tissue sarcomas in dogs: does surgical resection heal?
Provedor de dados: 195
Autores: Castro, Patrícia Ferreira de; Campos, Andressa Gianotti; Matera, Julia Maria.
Soft tissue sarcomas (STS), a heterogeneous group of different tumors of mesenchymal origin, are described as pseudo-encapsulated masses with poor defined margins that present high rates of local recurrence compared to the low to moderate metastatic potential. They can occur both in humans and animals, and in dogs they comprise approximately 15% of all skin and subcutaneous tumors. Due to its invasive behavior, surgery is the main treatment applied for these tumors in dogs, and it can be combined to radiotherapy after the incomplete resection because the role of chemotherapy is still very poorly understood in this subject.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mesenchymal neoplasia; Oncology; Tumor; Oncologic surgery; Canine; Neoplasia mesenquimal; Oncologia; Tumor; Cirurgia oncológica; Canina.
Ano: 2019
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37921

State-space analysis of soil data: an approach based on space-varying regression models
Provedor de dados: 63
Autores: Timm,Luís Carlos; Barbosa,Emanuel Pimentel; Souza,Manoel Dornelas de; Dynia,José Flávio; Reichardt,Klaus.
The assessment of the relationship among soil properties (such as total nitrogen and organic carbon) taken along lines called transects is a subject of great interest in agricultural experimentation. This question has been usually approached through standard state-space methods by some authors in the soil science literature. Important limitations of the mentioned procedures used in practice are pointed out and discussed in this paper, specially those related to the model parameters, meaning and practical interpretation. In the standard state-space approach, based on an autoregressive structure, it does not present any parameters that express the variables relationship at the same point in space, but only at lagged points. Also, its model parameters (in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dynamic regression; Soil properties; Spatial heterogeneity; Kalman filter.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200023

Oxisol subsurface chemical attributes related to sugarcane productivity
Provedor de dados: 63
Autores: Landell,Marcos Guimarães de Andrade; Prado,Hélio do; Vasconcelos,Antônio Carlos Machado de; Perecin,Dilermando; Rossetto,Raffaella; Bidoia,Márcio Aurélio Pitta; Silva,Marcelo de Almeida; Xavier,Mauro Alexandre.
In spite of the great homogeneity found in the morphological characteristics of Oxisols, there is great chemical diversity in subsurface layers of these soils. Studies indicate that crop yield presents significant correlation with the chemical attributes of the subsurface, which, are more stable than attributes found in the plough layer, subject to greater alterations as a consequence of agricultural exploration. This work evaluated the effects of subsurface chemical attributes of Oxisols of the South Central region of Brazil, on the yield of sugarcane clones and of variety RB72454, during the first, second and third cropping cycles. Productivity data were obtained between 1993 and 1998. Soils were characterized in terms of their mechanical analysis and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yield; Soils; Linear models; Chemical analysis.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400020

Yield, quality and drought sensitivity of tomato to water deficit during different growth stages
Provedor de dados: 63
Autores: Cui,Jintao; Shao,Guangcheng; Lu,Jia; Keabetswe,Larona; Hoogenboom,Gerrit.
ABSTRACT In areas where the supply of water for irrigation is limited, tomato production is often subject to drought stress. In order to investigate the drought sensitivity of tomato (Lycopersicon esculentum Mill.) yield and quality during different growth stages, field and pot experiments were conducted in a high tunnel in southern China during the 2013 and 2016 growing seasons. The experiments consisted of four treatments. Crops were drip-irrigated to 100 % of field capacity at all growth stages divided into treatment T1 (control) and the treatment group T2, T3 and T4 receiving half the amount of irrigation as T1 when the soil water content reached 70 % of field capacity, the vegetative phase (stage I) T2, the flowering and fruit development phase (stage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deficit irrigation; Sensitivity index; Irrigation management; High tunnel.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000200601

Agroforestry systems, nutrients in litter and microbial activity in soils cultivated with coffee at high altitude
Provedor de dados: 63
Autores: Notaro,Krystal de Alcantara; Medeiros,Erika Valente de; Duda,Gustavo Pereira; Silva,Aline Oliveira; Moura,Patrícia Maia de.
Agroforestry systems are an alternative option for sustainable production management. These systems contain trees that absorb nutrients from deeper layers of the soil and leaf litter that help improve the soil quality of the rough terrain in high altitude areas, which are areas extremely susceptible to environmental degradation. The aim of this study was to characterize the stock and nutrients in litter, soil activity and the population of microorganisms in coffee (Coffea arabica L.) plantations under high altitude agroforestry systems in the semi-arid region of the state of Pernambuco, Brazil. Samples were collected from the surface litter together with soil samples taken at two depths (0-10 and 10-20 cm) from areas each subject to one of the following...
Tipo: Info:eu-repo/semantics/article
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000200001

Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
Provedor de dados: 63
Autores: Novo,Patricia Elda; Valls,José Francisco Montenegro; Galdeano,Florencia; Honfi,Ana Isabel; Espinoza,Francisco; Quarin,Camilo Luis.
ABSTRACT Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facultative apomictic (asexual reproduction by seed) tetraploid, sporadically cultivated on Pantanal farms, propagated either by cuttings or seed. Due to its potential for extensive cultivation and forage quality, Grama-tio-pedro appears as a candidate for genetic improvement within the Plicatula group through plant breeding. We used a colchicine-induced sexual autotetraploid genotype of P. plicatulum Michx. to obtain interspecific hybrids using the apomictic species, P. oteroi, as pollen donor. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DNA content; Apomixis; Fertility; Meiosis; Reproductive mode.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000400356

การวิเคราะห์ความเสี่ยงในการปลูกข้าวนาน้ำฝนโดยใช้ระบบสารสนเทศภูมิศาสตร์และแบบจำลองการเจริญเติบโตของพืช
Provedor de dados: 106
Autores: Surajit Phuphak; Bas Bouman.
Risk due to rainfall variability is crucial in rainfed rice growing areas in the NE Thailand therefore analysis on risk coping of the farmers is importance. This research had evaluated the yield of KDML105 rice variety using a knowledge-based system approach, subject to rainfall uncertainty in 6 different kinds of paddies that related to soil and hydrological variability, with 4 scenarios of sowing times and 2 sowing methods in a watershed area of Ubon Ratchathani province. A GIS and a rice growth simulation model, ORYZA2000, tools were used with stochastic efficiency rule to analyze risk. The results showed that KDML105 yield was sensitive to rainfall variability, sowing times and sowing methods rather than variability of soil and hydrology which related...
Tipo: Collection
Palavras-chave: Risk analysis; Rainfed rice production; Crop growth simulation model; GIS; ORYZA2000; KDML 105; Yield; ข้าว; การปลูกข้าวนาน้ำฝน; แบบจำลองการเจริญเติบโต; จีไอเอส; ORYZA2000; พันธุ์ขาวดอกมะลิ 105; ผลผลิต; การวิเคราะห์ความเสี่ยง.
Ano: 2008
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5102

ความต้องการฝึกอบรมด้านการแปรรูปอาหารและการตลาดของสมาชิกกลุ่มวิสาหกิจชุมชนในจังหวัดขอนแก่น
Provedor de dados: 106
Autores: Chinnayan Srakaew; Chaicharn Wongsamun.
This research aims to study the training needs on food processing and marketing of community enterprise groups in Khon Kaen province. The subject matters of training were divided into 49 topics on plant processing, 41 topics on meat processing and 23 topics on marketing. Data were collection by interviewing 196 members during January - March 2012. The collected data were analyzed by computer program for frequency, percentage, minimum, maximum, standard deviation, t-test and F-test. The levels of need for training were assigned into three values, high equal 3, low equal 2 and none equal 1. The results showed that, 112 group members who had main food processing activity on plant products had a high level of training need on the topic making rice cracker and...
Tipo: PhysicalObject
Palavras-chave: Community enterprise group; Food processing; Training need; Knowledge development; Marketing; Agricultural extension; Participation; Khon Kaen province; กลุ่มวิสาหกิจชุมชน; การแปรรูปอาหาร; ผลิตภัณฑ์พืช; ผลิตภัณฑ์สัตว์; ความต้องการฝึกอบรม; การพัฒนาความรู้; มาตรฐานผลิตภัณฑ์; การตลาด; การส่งเสริมวิสาหกิจชุมชน; การมีส่วนร่วม; จ.ขอนแก่น.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5732

Drafts and notes
Provedor de dados: 24
Autores: Linné, Carl von.
Several drafts and notes, some possibly for lectures, grouped together probably by Dr Johan Markus Hulth. Contains: -'Petrae' (double folio sheet) - 'Ollaris' (single folio), laid out in the same layout as LM/LP/MIN/2/1 Notes on mineralogical genera, with general description and species list at the back. Also possibly lecture notes. - double folio sheet on 'Calx', 'Silex', 'Argilla', 'Mica', 'Fluor', 'Asbestus', 'Zeolithus', 'Saxa'. Contains notes by Linnaeus Filius on the history of botany. - double folio sheet on 'Minerae', 'Salia', 'Sulpura', 'Mercurialia' - double folio sheet on 'Fossilia', 'Terrae'. Within is a cut out (quarto size), on notes taken from "Lettres édifiantes écrites par quelques Missionaires de la Compagnie de Jesus", volume 22 (1750)...
Tipo: Collection
Ano: 2023

William Smith, London, to Sir James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Smith, William.
Presented a petition for the repeal of the Test Acts before adjournment of Parliament, believes he may be called to bring a motion although he would rather wait for a bill "for the relief of the Catholics". Further discussion of this subject and parliamentary affairs. Remarks that Sir Joseph Banks' will "has been thought to breathe the cold spirit of selfish aristocracy"; abstains from further judgement.  Criticises the Queen [Caroline (1768-1821), wife of George IV] for outraging "all the decencies of which she ought to be the fairest example" but many friends think his opinion "rank treason against injured innocence". Reports that his daughter Fanny wrote from Baden that "[Caroline] had exposed herself everywhere. Bemused that "domestic &amp; party...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62377/1/JES-COR-9-50_001.tif

Olof Swartz, Stockholm, [Sweden], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Swartz, Olof Peter.
Pleased Smith received the items he and [Erik] Acharius sent. Thanks for 'Carex' specimens Smith sent. Lists contents of a missing parcel sent for Smith in 1800, it was largely of cryptogamous plants and hopes to make it up again. Surprise at the accumulation of 'Carex' species in the Swedish flora. [Georg] Wahlenberg [(1780-1851)], who collected many of them, is on a return expedition to the north and hopes to go as far as Nordcap, a return journey of 2400 miles. Wahlenberg has described 170 species of 'Carex' in his paper on the subject, to be published in [Swedish] Academy [of Science's] "Handlingar", lists their intentions for enhancing it. Discusses lichens: possibly sent Smith 'Urceolaria gibbosa' instead of 'Lichen cinereus', discusses both. The...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62420/1/JES-COR-9-93_001.tif

Ottaviano Targioni Tozzetti, Florence, [Italy], to James Edward Smith, 14 Paradise Row, Chelsea, London
Provedor de dados: 24
Autores: Tozzetti, Ottaviano Targioni.
Gratified that both Smith and Sir Joseph Banks think the seeds of Mr Fabbroni are 'Lathyrus sativus' and not 'Lathyrus cicera', is currently writing a paper on the subject. Flattered by invitation to join the Linnean Society. Sending seeds requested by Smith, and the delayed catalogue of seeds [from botanic garden of Santa Maria Nuova hospital, extant]. Asks if Smith can purchase and send [James] Petiver's [(c 1665-1718)] complete "Concordia Graminum" for him. Catalogue of seeds [8pp], containing 1012 species.
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62432/1/JES-COR-10-2_001.tif

Olof Swartz, Stockholm, [Sweden], to James Edward Smith
Provedor de dados: 24
Autores: Swartz, Olof Peter.
The war [between Britain and France] has disrupted their correspondence for two and a half years, sends recent "transactions" of [Swedish] Academy [of Sciences]. Effect of the war on Swedish science: isolated from foreign literature, except for occassional communications from Britain, has seen parts of Smith's "Exotic Botany" and "Flora Graeca" and [Dawson] Turner's "Hist. Fucorum". Only remarkable things produced in Sweden have been the "Swedish Botany and Zoology" [Palmstruch's "Svensk botanik" (1802-1819)?], supervised by himself, and [Johan Peter] Westring's "history of the lichens". Isolated from European colleagues, which has disrupted the planned collaboration between himself and [Daniel Matthias Heinrich] Mohr [(1780-1808)] on a "Synopsis or...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62425/1/JES-COR-9-98_001.tif

Nicholas Gwyn, Ipswich, [Suffolk], to James Edward Smith, chez Monsieur Oriani, Astronome Professeur Royal, Milan, [Italy]
Provedor de dados: 24
Autores: Gwyn, Nicholas.
Praises Smith's thesis ["Disputatio Inauguralis quaedam de Generatione complectens"]. Discusses the subject further including apparent suggestions for experiments with chickens and speculation on hereditary traits. Asks Smith to use all his energies in acquiring the "hidden treasures" of [Charles] Plumier's [(1646-1704) French botanist] collections in Paris. Asks Smith to buy any works by [Lorenzo] Bellini [(1643-1704) Italian physician and anatomist] Smith comes across. Possible incorrect classification of 'Clypeola maritima L' into 'Alyssum siculum' and 'Alyssum maritimum'. Asks for second part of [Giovanni Antonio] Scopoli's "Entomology"; [Louis] Gerard's "Flora Gallo-provincialis" and new edition of [Antoine-Joseph Dezallier] D'argenville's...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61874/1/JES-COR-5-24_001.tif

William Withering, Edgbaston, [Warwickshire], to James Edward Smith, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Withering, William.
Informs Smith he is "not quite implacable" on account of Smith's critique in preface to seventh volume of "English botany", and that he is not "intemperately [...] friendly to reform"; wishes Smith had kept him a little more detached "from the furious reformers of Germany, whose zeal has carried them to adopt measures which can never be defended". His only statement on subject is that it renders "the business of investigation more easy", for sake of the ladies who "cannot fail to be shocked at the abominable &amp; indelicate idea of the females riding the males". Encloses specimen of "fungi parvi globosi" of "English botany"; observations. Asks that Smith delay figuring English 'Drosera' until he has sent specimens as he believes there are 5 species of...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/64371/1/JES-COR-26-66_001.tif

Farming and social-care combinations in Poland
Provedor de dados: 26
Autores: Pawelczyk, E.
The situation of social and health care is undoubtedly a field that needs improvement and more attention in Poland. Many groups of society, like homeless, disabled, unemployed or elderly people, lack sufficient support and stay alone with their problems. Expected economic development in Poland in the coming years should imply an increase of expenditures for social care and thereby narrow down the groups that cannot at present get this kind of support. Those two circumstances give great opportunities for development of Farming for Health (FH), as the need for high-quality social care in Poland is rising. At the moment in Poland there are some existing initiatives referring to FH as well. Those are mostly institutional care farms and some care activities on...
Tipo: Conference proceedings
Ano: 2005
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1272

The chemosensory system of Caenorhabditis elegans and other nematodes
Provedor de dados: 26
Autores: O'Halloran, D.M.; Fitzpatrick, D.A.; Burnell, A.M.
Olfactory systems allow organisms to detect and discriminate between thousands of low molecular mass, mostly organic, compounds which we call odours. Organisms as diverse as humans and nematodes utilize the same basic mechanisms for this sensory perception. Represented in the olfactory repertoire of both vertebrates and invertebrates are aliphatic and aromatic compounds with diverse functional groups including aldehydes, esters, ketones, alcohols, ethers, carboxylic acids, amines, halides and sulphides. Soil-dwelling nematodes encounter many types of volatile and water-soluble molecules in their environment; successful foraging depends on the animal’s ability to detect a gradient in one odorant while ignoring extraneous odours. Water-soluble chemicals tend...
Tipo: Conference proceedings
Ano: 2006
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1211

Accounting for variability in the detection and use of markers for simple and complex traits
Provedor de dados: 26
Autores: Chapman, S.C.; Wang, J.; Rebetzke, G.J.; Bonnett, D.G.
There are many sources of variability in gene–phenotype associations. During the measurement of genotype and phenotype and during selection, researchers must deal with experimental error in trials; gene-gene interaction (epistasis) for sub-traits and observed traits; trait-trait interaction (pleiotropy) and gene- or genotype-by-environment interaction. These effects can be structured in a framework that allows simulation of the entire gene-environment ‘landscape’. Studies of these landscapes have been published by others. Here we aim to explain with simple examples some of the types of insights that can be made. A current challenge for breeders working with simple marker–phenotype associations is to design selection strategies that can rapidly create new...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1294

Integrating physical and human dynamics in landscape trajectories: exemplified at the Aulnages watershed (Québec, Canada)
Provedor de dados: 26
Autores: Ruiz, J.; Domon, G.
With the increasing complexity of landscape issues and a paradigm shift towards holistic approaches, there is a crucial need to understand both the human and physical dynamics of landscapes and their interactions. From a holistic perspective, the landscape can be viewed as the combined result of dynamic interactions between land and individual. Based on this view of the landscape, this paper develops an approach based on the concept of landscape trajectory. Landscape trajectory is proposed as an intrinsic landscape characteristic, describing the nature of the interactions between physical and human dynamics. It recognizes three types of landscape trajectories: (i) the landscape trajectory that is characterized by complementary interactions between physical...
Tipo: Conference proceedings
Ano: 2005
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1102

Global warming in Amazonia: impacts and Mitigation
Provedor de dados: 36
Autores: Fearnside,Philip Martin.
Global warming has potentially catastrophic impacts in Amazonia, while at the same time maintenance of the Amazon forest offers one of the most valuable and cost-effective options for mitigating climate change. We know that the El Niño phenomenon, caused by temperature oscillations of surface water in the Pacific, has serious impacts in Amazonia, causing droughts and forest fires (as in 1997-1998). Temperature oscillations in the Atlantic also provoke severe droughts (as in 2005). We also know that Amazonian trees die both from fires and from water stress under hot, dry conditions. In addition, water recycled through the forest provides rainfall that maintains climatic conditions appropriate for tropical forest, especially in the dry season. What we need...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon; Climate change; Deforestation; Environmental services; Global warming; Greenhouse effect.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000400030

SOIL-PLANT NUTRIENT INTERACTIONS IN TWO MANGROVE AREAS AT SOUTHERN BRAZIL
Provedor de dados: 37
Autores: LANG MARTINS MADI,Ana Paula; TORRES BOEGER,Maria Regina; REISSMANN,Carlos Bruno; GERONAZZO MARTINS,Kelly.
Mangrove forests have a simple architecture. They shelter a few number of arboreal species that grow in a saline environment subject to tidal activity. The research objective was to evaluate possible interactions between physical-chemical soil attributes and plant-leaf nutrient concentrations of different mangrove species. Different mangrove species growing in the same soil, and the same mangrove species growing in two different soil classes were evaluated as to their leaf nutrient concentration patterns. The study was carried out in mangrove areas of the State of Paraná, southern Brazil, in two distinct soil classes: HISTOSOL THIOMORPHIC Salic sodic and GLEYSOL THIOMORPHIC Salic sodic; and three different species: Avicennia schaueriana, Laguncularia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avicennia schaueriana; Laguncularia racemosa; Mangrove; Soil; Plant nutrients; Rhizophora mangle; Soil chemical attributes.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000100004

Subspecies of Hypolepis rugosula (Dennstaedtiaceae; Pteridophyta) around the world: morphological and biogeographic perspectives
Provedor de dados: 39
Autores: Schwartsburd,Pedro Bond; Prado,Jefferson.
The "Hypolepis rugosula complex" has been the subject of great debate among pteridologists: some have considered H. rugosula a single subcosmopolitan (or circum-Antarctic) species, whereas others have considered it a species-complex, encompassing several species. In the 1920s and 1930s, four geographically distinct varietiesof H. rugosula were recognized. In this work, we present a new taxonomy (with new combinations and statuses, as well as typification and full synonymy), together with complete distribution data for the species, with an infraspecific classification based on morphological and biogeographic perspectives. Hypolepis rugosula occurs in southern temperate regions and high-elevation tropical regions of the Americas, Africa (including...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cold refugia; Phegopteris rugosula; Polypodium rugosulum; Taxonomic revision; Widely distributed ferns.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000200008

Responses of quinoa (Chenopodium quinoa Willd.) seeds stored under different germination temperatures
Provedor de dados: 1
Autores: Strenske, Andressa; Vasconcelos, Edmar Soares de; Egewarth, Vanessa Aline; Herzog, Neusa Francisca Michelon; Malavasi, Marlene de Matos.
In this experiment, we assessed the germination and vigor of quinoa seeds packed in paper bags and stored at room temperature for 36, 85, 119, 146, 177 and 270 days. The seeds were harvested under experimental conditions in Marechal Candido Rondon, Paraná, during the 2012/13 growing seasons. Four replicates of 100 seeds each were established for each storage time, and the seeds were evaluated, on paper, based on the BOD under the following experimental temperature conditions: alternating temperatures of 20 and 30°C and a constant temperature of 25°C. The seeds from both treatments were subject to seven-hour photoperiods and 25°C under continuous darkness. The germinated seeds were counted daily for eight days after sowing, and we evaluated the percentages...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.03-2 Germination test; Temperature; Photoperiod; Seed vigor Produção e Beneficiamento de Sementes.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30989

Morpho-physiology, yield, and water-use efficiency ofOpuntia ficus-indica irrigated with saline water
Provedor de dados: 1
Autores: Fonseca, Varley Andrade; Santos, Marcelo Rocha dos; Silva, João Abel da; Donato, Sérgio Luiz Rodrigues; Santos Rodrigues, Carlindo; Brito, Cleiton Fernando Barbosa.
Forage cactus pear is considered a xerophilic plant, so it is adapted to harsh semiarid conditions and is a forage resource of significant importance for animal production in regions that are subject to food shortage and long dry periods. We aimed to evaluate the morphometric and physiologic characteristics and water-use efficiency of ‘Gigante’ forage cactus pear under different settings of irrigation depth and irrigation intervals with saline water. The treatments included seven conditions of water application: rainfed, 5 liters of water per linear meter every 15 days; 7% reference evapotranspiration (ETo) with a 15-day irrigation interval; 15% ETo with a 7-day irrigation interval; 33% ETo with a 3-day irrigation interval; 50% ETo with a 2-day irrigation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Semiarid; Irrigation management; Salinity.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42631

Morpho-physiology, yield, and water-use efficiency ofOpuntia ficus-indica irrigated with saline water
Provedor de dados: 1
Autores: Fonseca, Varley Andrade; Santos, Marcelo Rocha dos; Silva, João Abel da; Donato, Sérgio Luiz Rodrigues; Santos Rodrigues, Carlindo; Brito, Cleiton Fernando Barbosa.
Forage cactus pear is considered a xerophilic plant, so it is adapted to harsh semiarid conditions and is a forage resource of significant importance for animal production in regions that are subject to food shortage and long dry periods. We aimed to evaluate the morphometric and physiologic characteristics and water-use efficiency of ‘Gigante’ forage cactus pear under different settings of irrigation depth and irrigation intervals with saline water. The treatments included seven conditions of water application: rainfed, 5 liters of water per linear meter every 15 days; 7% reference evapotranspiration (ETo) with a 15-day irrigation interval; 15% ETo with a 7-day irrigation interval; 33% ETo with a 3-day irrigation interval; 50% ETo with a 2-day irrigation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Semiarid; Irrigation management; Salinity.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42631

Xylanase - complex efficacy in high-energy diet for bulls finished in feedlot
Provedor de dados: 2
Autores: Neumann, Mikael; Leão, Guilherme Fernando Mattos; Vigne, Gabriela Letícia Dalai; Santos, Leslei Caroline dos; Venancio, Bruno José; Dochwat, André.
Enzymes can be an interesting additive in high energy diets for feedlot cattle. However, literature is inconsistent on this subject. Thus, this study was conducted to evaluate animal performance of feedlot bulls receiving high energy diet, composed of a mixture of 85% whole corn grain and 15% protein-mineral-vitamin nucleus, without or with xylanase included in the diets. Diets consisted of: CON - diet without enzymes (Control) and ENZ - diet with enzymes (5 g animal day-1). Thirty-two bulls were used, with an average age of 11 ± 2 months, average initial weight of 365 ± 5 kg, and finished for 119 days in feedlot. The experimental design was completely randomized, consisting of two treatments and eight replications, where each replication was represented...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrição e Alimentação Animal; Avaliação de Alimentos para Animais beef cattle; Feed additive; Ruminant nutrition.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/37321

The context of the size and distance of Atlantic Forest fragments in a small city in Southern Brazil
Provedor de dados: 3
Autores: Patrício, Matheus Bueno; Ferreira, José Hilário Delconte; Couto, Edivando Vitor do.
The Atlantic Forest is highly anthropized, this reduce the areas of native vegetation and impacts the biodiversity of the biome. The objective of this study is to analyze forest remnants with native vegetation characteristics using a free GIS. This analysis takes place using landscape metrics and was based on the supervised vectorization of land use in the municipality of California, PR. The area of the vectored polygons was obtained and a classified, and then the calculation was made with the nearest neighbor index, mean distance observed, Patton diversity index and the perimeter/area ratio of forest fragments. The results show that most of the fragments have an area smaller than 1 ha, the fragments with more significant area (&amp;lt;50 ha) represent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Small fragments; Biodiversity; California; Semideciduous Seasonal Forest.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46936

Antibacterial activity of Aroeira honeys produced in Minas-Gerais against bacteria of clinical importance
Provedor de dados: 3
Autores: Viana, Fabiana Ribeiro; Carmo, Luiz Simeão do; Bastos, Esther Margarida Alves Ferreira.
The biological activity of honey has been the subject of great scientific investigation. Bee products are widely used in folk medicine to treat human diseases due to their antibacterial and inhibitory potential action on different human pathogens. Ten honey samples produced by Apis mellifera in the northern of Minas Gerais state were tested against pathogenic microorganisms Staphylococcus aureus TSST (clinical isolated) and enterohaemorrhagic Escherichia coli ATCC 43895 for determination of their minimum inhibitory concentrations. The microdilution technique in broth Mueller-Hinton broth (MHB) was used in four concentrations (25, 12.5, 6.25 and 3.125%). There was a reduction of bacterial growth for the two target species at all concentrations tested. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bee products; Antibacterial activity; Staphylococcus aureus; Escherichia coli.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36766

Characterization of blueberry cultivar ‘climax’
Provedor de dados: 3
Autores: Radünz, André Luiz; Scheunemann, Lucas Celestino; kröning, Daiane Pinheiro; Herter, Flavio Gilberto; Reichert Junior, Francisco Wilson; Radunz, Marjana; Silva, Vanessa Neumann.
  The objective of this work was to characterize the blueberry (Vaccinium spp.) cultivar Climax, Rabbiteye group (Vaccinium ashei Reade). In order to achieve that, a survey with blueberry plants (cultivar Climax), in full production, was conducted during the 2012/13 and 2013/14 seasons in the mesoregion of Pelotas, Rio Grande do Sul State, Brazil. Data regarding the distribution of flower and vegetative buds on branches of two lengths (long and short) was collected. Another evaluation, considering three positions of flower buds in the branch (apical, medial and basal), the number of flower primordia, open flowers and fruits formed was performed. Data were subject to ANOVA and, when significant, the averages were compared using either the F or Tukey’s HSD...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.00-8 Fitotecnia; 2.03.03.00-9 Fisiologia Vegetal; Production habit; Small fruits; Blueberry; Flower primordial; Vaccinium spp. 5.01.03.01-6 Manejo e Tratos Culturais; 2.03.03.03-3 Ecofisiologia Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/40472

Anthropometric survey of farm workers of Ladakh region of India and its application in equipment design
Provedor de dados: 111
Autores: DIXIT, JAGVIR; Namgial, Deldan; Sharma, Sushil; Lohan, Shiv Kumar; Kumar, Dinesh.
Abstract: The environment and resultant discomfort has severe impact on overall working efficiency of human and machine while using farm tools and machinery in hills.  The Ladakh region of Jammu and Kashmir State of India is predominantly hilly.  Anthropometric data of agricultural workers is very essential for the safe and efficient design of farm machinery.  In the present studies, an anthropometric survey was carried out for agricultural workers of Ladakh region, wherein 90 male and female agricultural workers were selected and 79 body dimensions were precisely measured and recorded from each subject, thereafter analysed statistically.  For making the data comprehensive and more useful, a set of 23 body dimensions, which are having direct implications...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering; Farm Power Machinery Anthropometric survey  body dimensions  agricultural workers  tool design.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2794

The Antioxidant Properties of Compressed Persimmon Fruit using Putrescine Coatings and Polyamine Films
Provedor de dados: 111
Autores: Azadbakht, Mohsen; Jafarzadeh, Sajad; Varasteh, Faryal; Vahedi Torshizi, Mohammad.
This study was conducted considering the high importance of persimmon's chemical properties and the effect of different factors on its variations during storage and maintaining period. This study attempted to investigate some cases such as the effect of compressive loading parameters at 2 levels of 150 N and 250 N, three types of foam container packaging with polyolefin film, polyethylene terephthalate, and ordinary box and four types of putrescine polyamine coating with concentrations of 1 mM and 2 mM, distilled water and uncoated state, the chemical properties of persimmon fruit including the number of antioxidants, total phenol, flavonoids, vitamin C, pH, acidity and dissolved solids. The results showed that the highest content of total phenol and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Persimmon; Coating; Packaging; Antioxidant; Vitamin C.
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7291

Towards the implementation of the Green Building concept in agricultural buildings: a literature review
Provedor de dados: 111
Autores: Mohamed Samer; Cairo University, Faculty of Agriculture, Department of Agricultural Engineering.
The “Green Building” is an interdisciplinary theme, where the green building concept includes a multitude of elements, components and procedures which diverge to several subtopics that intertwined to form the green building concept.  Generally, the green building is considered to be an environmental component, as the green building materials are manufactured from local eco-sources, i.e. environmentally friendly materials, which are then used to make an eco-construction subject to an eco-design that provides a healthy habitat built on the cultural and architectural heritage in construction while ensuring conservation of natural resources.  This ensures disassembling the building components and materials, after a determined building lifetime, to...
Palavras-chave: Agricultural Engineering; Agricultural Buildings and Bioenvironmental Engineering green building; Agricultural buildings; Biocement; Eco-cement; Green concrete; Green roofs; Low-energy building; Zero-carbon building; Eco-construction.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2329

Particle Fluxes and Bulk Geochemical Characterization of the Cabo Frio Upwelling System in Southeastern Brazil: Sediment Trap Experiments between Spring 2010 and Summer 2012
Provedor de dados: 42
Autores: ALBUQUERQUE,ANA LUIZA S.; BELÉM,ANDRÉ L.; ZULUAGA,FRANCISCO J.B.; CORDEIRO,LIVIA G.M.; MENDOZA,URSULA; KNOPPERS,BASTIAAN A.; GURGEL,MARCIO H.C.; MEYERS,PHILIP A.; CAPILLA,RAMSÉS.
Physical and biogeochemical processes in continental shelves act synergistically in both transporting and transforming suspended material, and ocean dynamics control the dispersion of particles by the coastal zone and their subsequent mixing and dilution within the shelf area constrained by oceanic boundary currents, followed by their gradual settling in a complex sedimentary scenario. One of these regions is the Cabo Frio Upwelling System located in a significantly productive area of Southeastern Brazil, under the control of the nutrient-poor western boundary Brazil Current but also with a wind-driven coastal upwelling zone, inducing cold-water intrusions of South Atlantic Central Water on the shelf. To understand these synergic interactions among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sediment traps; Bulk geochemical composition; Cabo Frio Upwelling System; Particle flux; Southeastern Brazilian shelf.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200601

A Model Analysis for the Design and Deployment of an Eulerian Sediment Trap Mooring Array in a Western Boundary Upwelling System from Southeast Brazil
Provedor de dados: 42
Autores: MENDOZA,URSULA; CANDELLA,ROGÉRIO N.; ASSAD,LUIZ P.F.; CASTILLO,FEDERICO V.; AZEVEDO,LAURA; KNOPPERS,BASTIAAN A.; ALBUQUERQUE,ANA LUIZA S.
This work addresses the design and configuration of a Eulerian sediment trap mooring array, which was deployed at the shelf edge (zm ≈ 140 m) 80 km off Cabo Frio, SE- Brazil (23° S). The site was subject to interplay between the Tropical Waters (TW) of the Brazil Current (BC), intrusions from the South Atlantic Central Waters (SACW), which are the source of upwelling in the region, and other oceanographic processes. Detailed computations were used to optimize the total weight, buoyancy balance, and maximum acceptable tilt to avoid hydrodynamic bias in the trapping efficiency and array adaptation to the local oceanographic conditions with the assistance of Matlab and Muringa programs and Modular Ocean Model 4.0 (MOM; i.e., to assert the vertical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Design; Mooring array; Sediment traps; Trap efficiency; Cabo Frio upwelling; SE-Brazil.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200589

Monitoring of physiological and blood parameters during perinatal and neonatal period in calves
Provedor de dados: 45
Autores: Piccione,G.; Casella,S.; Pennisi,P.; Giannetto,C.; Costa,A.; Caola,G.
Rectal temperature, heart and respiratory rates, and the course of some blood parameters were monitored in calves during perinatal and neonatal periods. The study was carried out on eight Limousine calves. From all subjects, rectal temperature, heart rate, and respiratory rate were measured. Blood samples were taken at the same hour (9am) from the external jugular vein, and then centrifuged and stored until analyses. By means of an UV spectrophotometer, the following blood parameters were assessed for each subject: total protein, total cholesterol, triglycerides, glucose, non-esterified fatty acids (NEFA), urea, creatinine, cholinesterase, lactate dehydrogenase (LDH), hydroxybutirate, glutamate pyruvate transaminases (GPT), glutamate oxalacetate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calf; Neonatal period; Perinatal period; Blood parameters; Physiological parameters.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000100001

Blood gas analysis in pigs submitted to different concentrations of nitrous oxide or oxygen, under different ventilatory modalities
Provedor de dados: 45
Autores: Biteli,E.G.F.; Nunes,N.; Lopes,P.C.F.; Silva,P.E.S.; Ido,C.K.; Silva,H.R.A.; Horr,M.; Carneiro,R.L.; Bompadre,T.F.V.
ABSTRACT The effects of different concentrations of oxygen and nitrous oxide on blood gas parameters in pigs maintained under spontaneous or pressure-controlled ventilation, with or without positive end-expiratory pressure (PEEP), were compared. Forty-eight pigs were randomly divided into six groups, submitted to different concentrations of compressed air or N2O, associated with different fractions of inspired oxygen (FiO2). The group subject to 30% of compressed air (GA30) showed the closest proximity to the physiological range of partial pressure (PaO2) expected for the species. For oxygen saturation (SaO2), the values obtained were below the lower physiological limit in the group administered 30% N2O (GN30). Use of PEEP positively interfered in PaCO2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alkylphenol; Atelectasis; Pigs; Respiration.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000100035

Aquatic invertebrates associated with bromeliads in Atlantic Forest fragments
Provedor de dados: 49
Autores: Paula Júnior,Antonio Teixeira de; Rosa,Beatriz Figueiraujo Jabour Vescovi; Alves,Roberto Gama; Divino,Alex Campos.
Abstract: Forest fragments in the state of Minas Gerais contain a large number of Bromeliaceae genera, whose cisterns accumulate water and organic matter, providing shelter and food for a wide range of organisms. However, these fragments often consist only of small patches of vegetation, making the species more vulnerable to the effects of this landscape changes. This study aimed to test the effect of the distance to the edge and of the matrix type on the structure of aquatic invertebrate communities in four morphospecies of bromeliads. Samples were collected in Atlantic Forest fragments adjacent to pasture and planted forest areas, in a region of Serra da Mantiqueira, Brazil. Of the 147 bromeliads investigated, we found 35 taxa, among which the most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Edge effect; Phytotelma; Invertebrates; Remaining forest.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100202

Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination
Provedor de dados: 49
Autores: Salemi,Luiz Felippe; Lins,Silvia Rafaela Machado; Ravagnani,Elizabethe de Campos; Magioli,Marcelo; Martinez,Melissa Gaste; Guerra,Fernando; Vidas,Natassia Bonini; Fransozi,Aline; Ferraz,Silvio Frosini de Barros; Martinelli,Luiz Antonio.
Abstract In this article, by using carbon stable isotopes, we assessed the past and present land use influences that riparian areas are subject within agricultural landscapes. Emphasis is given to the understanding of the effects of the 2012 Brazilian Forest Act on such areas. We selected five riparian areas within a highly C4 dominated agricultural landscape. Three of them had 30 meters native riparian forest buffer (NRFB) and two of them had 8 meter and no NRFB. We used three 100 meter-transects located 5, 15 and 30 meters relative to stream channel to obtain soil samples (0 - 10 cm). All riparian areas presented soil carbon isotopic signatures that are not C3 (native forests) irrespective of having or not 30 meters NRFB. Two cases presenting less than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Soil degradation; Organic matter; Sediment; Carbon cycling.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200210

Conhecimento e conservação dos peixes marinhos e estuarinos (Chondrichthyes e Teleostei) da costa norte do Brasil
Provedor de dados: 49
Autores: Marceniuk,Alexandre Pires; Caires,Rodrigo Antunes; Wosiacki,Wolmar Benjamin; Dario,Fabio Di.
The tropical western South Atlantic, which includes a substantial portion of the Brazilian Exclusive Economic Zone, is a region of endemism broadly recognized as being of prime importance for the conservation of the marine biodiversity. The north coast of Brazil, which comprises the states of Amapá, Pará and Maranhão from the mouth of the rio Oiapoque to the mouth of the rio Parnaíba, harbors the largest continuous mangrove in the world, with approximately 8,900 km2. The high discharge of freshwater and continental sediments in the delta of the Amazonas affects the regime of tides, ocean currents, and several oceanographic processes of the north coast, with direct impact on the composition of the biota found in the region. Despite its economic value and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Inventory; Natural resources; Zoological collections; Exclusive Economic Zone.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400251

Ethanol on the postharvest control of anthracnose in ‘Kumagai’ guava
Provedor de dados: 53
Autores: Ponzo,Francine Scolfaro; Benato,Eliane Aparecida; Silva,Barbara Marçon Pereira da; Cia,Patrícia.
ABSTRACT The aim of this study was to evaluate the effects of ethanol on the control of Colletotrichum spp. in ‘Kumagai’ guava and on the fruit physical-chemical attributes. For this purpose, three assays were carried out. For the first assay, fruit were exposed to ethanol vapor (0, 1, 2, 4, and 8 mL∙kg-1), applied in hermetic containers. On the second, ethanol was applied by immersion for 2 minutes in different concentrations (20, 30, 40, and 50%). On the last assay, fruit were immersed in 30, 40, and 50% ethanol for 2, 5, and 10 minutes. Fruit that were not exposed to volatile (first assay) or water treated (second and third assay) were used as control. In all assays, guavas were first inoculated with a conidial suspension of Colletotrichum spp. and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava. Colletotrichum spp.; Alternative control; Ethylic alcohol.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100160

Dry Extract of Passiflora incarnata L. leaves as a Cardiac and Hepatic Oxidative Stress Protector in LDLr-/- Mice Fed High-Fat Diet
Provedor de dados: 52
Autores: Sarto,Danielle Aparecida Quintino Silva; Siqueira,Ana Helena D’Arcadia de; Magalhaes,Francisco Monteiro de Almeida; Caproni,Karine de Paula; Martins,Ângela Maria; Santos,Gérsika Bitencourt; Silva,Délcio Bueno da; Boas,Brígida Monteiro Vilas; Garcia,José Antônio Dias.
ABSTRACT The control of dyslipidemia by using herbal products is an important subject for studies. In this study, we evaluated the effects of dry Passiflora incarnata L. extract over dyslipidemia, left ventricular hypertrophy, and hepatic oxidative stress of LDL receptor knockout mice (LDLr-/-). Forty 4-month old male LDLr-/- mice were distributed into four groups: Group standard diet; Group standard diet and 200 mg/kg of body weight of Passiflora incarnata L. leaf dry extract; Group high-fat diet; Group high-fat diet and 200 mg/kg of body weight of Passiflora incarnata L. leaf dry extract. After 30 days, Passiflora incarnata L. dry extract reduced the effects of the high-fat diet, with a decrease of total cholesterol, triglycerides, and increase of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Passion fruit; Left ventricular hypertrophy; Dyslipidemia; Oxidative stress.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100321

Radiotherapy, cancer and some anatomical structures related with the pelvic floor: an evaluation of the scientific literature
Provedor de dados: 52
Autores: Santos-Filho,Sebastião David; Presta,Giuseppe Antonio; Paoli,Severo de; Missailids,Sotiris; Fonseca,Adenilson de Souza da; Bernardo-Filho,Mario.
Radiotherapy is a cancer treatment that uses high-energy X-rays or other types of ionizing radiation to try to kill the cancer cells in various organs/tissues. PubMed is a database used as a tool in various publications. The aim of this work was to evaluate, in the PubMed, the number of publications (NP) in radiotherapy and cancer in various organs related to the pelvic floor as well as brachytherapy. The searches were performed (August 2008) in the PubMed (http://www.pubmed.com) using the words: (i) radiotherapy (RT) or cancer (CA), (ii) RT and CA, (iii) RT and CA and prostate, RT and CA and testis, RT and CA and breast, RT and CA and kidneys, RT and CA and vulva, RT and CA and vagina, RT and CA and penis, RT and CA and uterus, RT and CA and ovary, RT and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Radiotherapy; Cancer; Pelvic floor; PubMed; Scientific interest.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000700008

Nuclear medicine in tropical diseases
Provedor de dados: 52
Autores: Braga,Francisco José Hossri Nogueira.
Tropical diseases affect more people in the world than any other kind of disease, but scintigraphic data on that matter are not so frequent in the literature. Since the geographic regions where such diseases occur are normally very poor, scintillation cameras may not be available. We present a resumed summary of part of what has been done on this subject to-date. Leprosy affects circa 12 million people worldwide and has already been studied by means of the following scintigraphic exams: Gallium-67, 99mTc-MDP or HMDP, 99mTc-colloid or Dextran, 99mTc-DTPA and 99mTc-WBC. Paracoccidiodomycosis is a deep mycosis and such cases may be evaluated by means of Gallium-67, bone scintigraphy, lymphoscintigraphy, hepato-billiary, bone marrow and liver / spleen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nuclear medicine; Scintigraphy; Tropical diseases; Leprosy; Paracoccidioidomycosis; Blastomycosis; Mucormycosis; Tuberculosis; Neurocysticercosis; Cutaneous and mucous leishmaniasis; Chagas’ disease.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000500002

Evaluation of preprandial and postprandial serum bile acids and plasma ammonia concentrations in healthy domestic cats and the effects of frozen storage on plasma ammonia concentrations
Provedor de dados: 62
Autores: KOGIKA,Márcia Mery; IMAGAWA,Viviane Higuchi; LUCAS,Silvia Regina Ricci; MIRANDOLA,Regina Mieko Sakata; HAGIWARA,Mitika Kuribayashi.
The evaluation of hepatic diseases in cats requires many laboratorial tests, and those routinely used are less conclusive. Considering the little availability of data and controversies related to the subject, we decided to study the preprandial and postprandial serum bile acids and plasma ammonia levels, and the effects of storage on these values. Preprandial (fasting) and postprandial serum bile acid (SBA) levels of 20 adult, healthy cats were determined using the enzymatic method. The measured values were 0.5 ± 0.1 and 3.6 ± 1.0 µmol/L, respectively. The preprandial and postprandial plasma ammonia (PA) levels, obtained 30 minutes after blood collection, 157.0 ± 18.7 µg/dL or 89.5 ± 10.7 µmol/L and 295.3 ± 28.2 µg/dL or 165.2 ± 17.3 µmol/L, were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bile acids; Ammonia; Cats.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961999000300001

Patterns of influenza B circulation in Brazil and its relevance to seasonal vaccine composition
Provedor de dados: 55
Autores: Barros,Eliana Nogueira Castro de; Cintra,Otavio; Rossetto,Erika; Freitas,Laís; Colindres,Romulo.
Abstract Data on the burden of disease and circulation patterns of influenza B lineages for Brazil are limited. This review aims to describe the pattern of influenza B occurrence in Brazil to have a better understanding of its epidemiology and its relevance when considering seasonal influenza vaccine composition. A review of the data including analysis of international and local surveillance data as well as information from online search of databases using Medical Subject Headings terms in conjunction with screening of abstracts from scientific events was performed. Based on international epidemiologic surveillance data, moderate levels of influenza B disease (19%; 2006–2014) were observed. Of these nine years, it was possible to compare data from three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Influenza B; Co-circulation; Mismatch; Influenza vaccines.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000100081

Catheter-related infection due to Papiliotrema laurentii in an oncologic patient: Case report and systematic review
Provedor de dados: 55
Autores: Londero,Marcos Rech; Zanrosso,Crisley Dossin; Corso,Leandro Luis; Michelin,Lessandra; Soldera,Jonathan.
ABSTRACT  Background: Papiliotrema laurentii is one of several non-neoformans cryptococci that have rarely been associated with human infection, since it was previously considered saprophyte and thought to be non-pathogenic to humans. Nevertheless, increasing number of reports of human infection have emerged in recent years, mostly in oncologic patients.  Aim: To report a case of a female patient with pyloric obstructive cancer with a catheter-related Papiliotrema laurentii blood stream infection and systematically review the available evidence on P. laurentii infection in humans.  Methods: Retrieval of studies was based on Medical Subject Headings and Health Sciences Descriptors, which were combined using Boolean operators. Searches were run on the...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Cryptococcus; Papiliotrema; Catheter-related infections; Amphotericin B; Stomach neoplasms.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000600451

Molecular characterization of microbial contaminants isolated from Umbilical Cord Blood Units for transplant
Provedor de dados: 55
Autores: Bello-López,Juan Manuel; Noguerón-Silva,Jorge; Castañeda-Sánchez,Jorge Ismael; Rojo-Medina,Julieta.
ABSTRACT Disposal of Umbilical Cord Blood Units due to microbial contamination is a major problem in Cord Blood Banks worldwide as it reduces the number of units available for transplantation. Additionally, economic losses are generated as result of resources and infrastructure used to obtain such units. Umbilical Cord Blood Units that showed initial microbial contamination were subject to strains isolation, identification, and characterization by sequencing the 16S rRNA gene and Enterobacterial Repetitive Intergenic Consensus (ERIC-PCR). Moreover, tests of antimicrobial resistance/sensitivity and phenotypic activities that may play an important role in microbial infection were performed. Microbial contamination was detected in 120 Umbilical Cord Blood...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Umbilical Cord Blood Units; Microbial contamination; Molecular characterization.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000600571

Angina pectoris in patients with HIV/AIDS: prevalence and risk factors
Provedor de dados: 55
Autores: Zirpoli,Josefina Cláudia; Lacerda,Heloisa Ramos; Albuquerque,Valéria Maria Gonçalves de; Albuquerque,Maria de Fátima Pessoa Militão de; Miranda Filho,Demócrito de Barros; Monteiro,Verônica Soares; Barros,Isly Lucena de; Arruda Junior,Evanízio Roque de; Montarroyos,Ulisses Ramos; Ximenes,Ricardo Arraes de Alencar.
INTRODUCTION: The incidence of ischemic heart disease is higher in patients with HIV/AIDS. However, the frequency of angina pectoris in these patients is still not known. Literature about this subject is still scarce. OBJECTIVE: To evaluate the prevalence of angina pectoris and risk factors for coronary disease and to examine the association between traditional risk factors and HIV-related risk factors and angina pectoris. METHOD: An epidemiological cross-sectional study, analyzed as case-control study, involving 584 patients with HIV/AIDS. Angina pectoris was identified by Rose questionnaire, classified as definite or possible. Information regarding risk factors was obtained through a questionnaire, biochemical laboratory tests, medical records and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acquired immunodeficiency; Syndrome; Angina pectoris; Coronary disease; Risk factors.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000100001

Pharmacodynamic profiling of commonly prescribed antimicrobial drugs against Escherichia coli isolates from urinary tract
Provedor de dados: 55
Autores: Cuba,Gabriel Trova; Pignatari,Antonio Carlos Campos; Patekoski,Katya Silva; Luchesi,Lucimila Jorge; Kiffer,Carlos Roberto Veiga.
Since antimicrobial resistance among uropathogens against current first line agents has affected the management of severe urinary tract infection, we determined the likelihood that antibiotic regimens achieve bactericidal pharmacodynamic exposures using Monte Carlo simulation for five antimicrobials (ciprofloxacin, ceftriaxone, piperacillin/tazobactam, ertapenem, and meropenem) commonly prescribed as initial empirical treatment of inpatients with severe community acquired urinary tract infections. Minimum inhibitory concentration determination by Etest was performed for 205 Brazilian community urinary tract infection Escherichia coli strains from 2008 to 2012 and 74 E. coli bloodstream strains recovered from a surveillance study. Pharmacodynamic exposure...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pharmacodynamics; Monte Carlo method; Escherichia coli; Urinary tract infection.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000500512

Metabolite and light regulation of metabolism in plants: lessons from the study of a single biochemical pathway
Provedor de dados: 56
Autores: Oliveira,I.C.; Brenner,E.; Chiu,J.; Hsieh,M.-H.; Kouranov,A.; Lam,H.-M.; Shin,M.J.; Coruzzi,G.
We are using molecular, biochemical, and genetic approaches to study the structural and regulatory genes controlling the assimilation of inorganic nitrogen into the amino acids glutamine, glutamate, aspartate and asparagine. These amino acids serve as the principal nitrogen-transport amino acids in most crop and higher plants including Arabidopsis thaliana. We have begun to investigate the regulatory mechanisms controlling nitrogen assimilation into these amino acids in plants using molecular and genetic approaches in Arabidopsis. The synthesis of the amide amino acids glutamine and asparagine is subject to tight regulation in response to environmental factors such as light and to metabolic factors such as sucrose and amino acids. For instance, light...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Carbon; Ammonium; Nitrogen assimilation; Gene expression; Arabidopsis thaliana.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500003

Effect of Camellia sinensis teas on left ventricular hypertrophy and insulin resistance in dyslipidemic mice
Provedor de dados: 56
Autores: Ferreira,M.C.L.; Lima,L.N.; Cota,L.H.T.; Costa,M.B.; Orsi,P.M.E.; Espíndola,R.P.; Albanez,A.V.; Rosa,B.B.; Carvalho,M.G.S.; Garcia,J.A.D.
The control of dyslipidemia using plants is an important subject of studies since it has numerous benefits in cardiovascular protection. The objective of this study was to evaluate the effect of three Camellia sinensis L. teas (green, red, and white) on left ventricular hypertrophy and insulin resistance in low-density lipoprotein receptor knockout (LDLr-/-) mice fed a high-fat diet. The LDLr-/- mice were divided into four experimental groups: Group C: standard feed; Group CT: standard feed and three teas, Group HL: high-fat feed; HLT Group: high-fat feed and three teas. The three types of tea (green, red, and white) originated from different processing of the Camellia sinensis L. plant, and were administered associated once a day at a dose of 25 mg/kg by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lipids; Cardiovascular system; Tea; Glucose; Insulin.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000500607

Category fluency test: effects of age, gender and education on total scores, clustering and switching in Brazilian Portuguese-speaking subjects
Provedor de dados: 56
Autores: Brucki,S.M.D.; Rocha,M.S.G.
Verbal fluency tests are used as a measure of executive functions and language, and can also be used to evaluate semantic memory. We analyzed the influence of education, gender and age on scores in a verbal fluency test using the animal category, and on number of categories, clustering and switching. We examined 257 healthy participants (152 females and 105 males) with a mean age of 49.42 years (SD = 15.75) and having a mean educational level of 5.58 (SD = 4.25) years. We asked them to name as many animals as they could. Analysis of variance was performed to determine the effect of demographic variables. No significant effect of gender was observed for any of the measures. However, age seemed to influence the number of category changes, as expected for a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Verbal fluency; Educational level; Neuropsychological tests; Category fluency.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001200002

Where do we aspire to publish? A position paper on scientific communication in biochemistry and molecular biology
Provedor de dados: 56
Autores: Baptista,M.S.; Alves,M.J.M.; Arantes,G.M.; Armelin,H.A.; Augusto,O.; Baldini,R.L.; Basseres,D.S.; Bechara,E.J.H.; Bruni-Cardoso,A.; Chaimovich,H.; Colepicolo Neto,P.; Colli,W.; Cuccovia,I.M.; Da-Silva,A.M.; Di Mascio,P.; Farah,S.C.; Ferreira,C.; Forti,F.L.; Giordano,R.J.; Gomes,S.L.; Gueiros Filho,F.J.; Hoch,N.C.; Hotta,C.T.; Labriola,L.; Lameu,C.; Machini,M.T.; Malnic,B.; Marana,S.R.; Medeiros,M.H.G.; Meotti,F.C.; Miyamoto,S.; Oliveira,C.C.; Souza-Pinto,N.C.; Reis,E.M.; Ronsein,G.E.; Salinas,R.K.; Schechtman,D.; Schreier,S.; Setubal,J.C.; Sogayar,M.C.; Souza,G.M.; Terra,W.R.; Truzzi,D.R.; Ulrich,H.; Verjovski-Almeida,S.; Winck,F.V.; Zingales,B.; Kowaltowski,A.J.
The scientific publication landscape is changing quickly, with an enormous increase in options and models. Articles can be published in a complex variety of journals that differ in their presentation format (online-only or in-print), editorial organizations that maintain them (commercial and/or society-based), editorial handling (academic or professional editors), editorial board composition (academic or professional), payment options to cover editorial costs (open access or pay-to-read), indexation, visibility, branding, and other aspects. Additionally, online submissions of non-revised versions of manuscripts prior to seeking publication in a peer-reviewed journal (a practice known as pre-printing) are a growing trend in biological sciences. In this...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Scientific journals; Scientific editing; Pre-prints; Open access; Peer review.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000900401

Collagen XVIII/endostatin expression in experimental endotoxemic acute renal failure
Provedor de dados: 56
Autores: Cichy,M.C.; Rocha,F.G.G.; Tristão,V.R.; Pessoa,E.A.; Cenedeze,M.A.; Nürmberg Junior,R.; Schor,N.; Bellini,M.H.
Acute renal failure (ARF) is a frequent complication of Gram-negative sepsis, with a high risk of mortality. Lipopolysaccharide (LPS)-induced ARF is associated with hemodynamic changes that are strongly influenced by the overproduction of nitric oxide (NO) through the cytokine-mediated up-regulation of inducible NO synthase. LPS-induced reductions in systemic vascular resistance paradoxically culminate in renal vasoconstriction. Collagen XVIII is an important component of the extracellular matrix expressed in basement membranes. Its degradation by matrix metalloproteases, cathepsins and elastases results in the formation of endostatin, claimed to have antiangiogenic activity and to be a prominent vasorelaxing agent. We evaluated the expression of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute renal failure; Lipopolysaccharide; Gene expression; Endostatin; CD31.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001200005

Role of microRNAs in the treatment of type 2 diabetes mellitus with Roux-en-Y gastric bypass
Provedor de dados: 56
Autores: Zhu,Z.; Yin,J.; Li,D.C.; Mao,Z.Q.
The aim of this study was to investigate the effect of Roux-en-Y gastric bypass (RYGB) on the peripheral blood microRNAs (miRNAs) of patients with type 2 diabetes mellitus (T2DM). miRNAs are small 20- to 22-nucleotide (nt) noncoding RNAs. They constitute a novel class of gene regulators that negatively regulate gene expression at the post-transcriptional level. miRNAs play an important role in several biological processes. Twelve patients with T2DM who were scheduled to undergo laparoscopic RYGB surgery were separated into two groups, using a body mass index of 30 kg/m2 as a cut-off point. Venous blood was collected before operation and 12 months after operation. A significant change was observed in the peripheral blood miRNA expression profile of both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Expression profile; Methylation; MicroRNA; Roux-en-Y gastric bypass; Type 2 diabetes mellitus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000300705

Prevalence and risk factors for HBV, HCV and HDV infections among injecting drug users from Rio de Janeiro, Brazil
Provedor de dados: 56
Autores: Oliveira,M.L.A.; Bastos,F.I.; Telles,P.R.; Yoshida,C.F.T.; Schatzmayr,H.G.; Paetzold,U.; Pauli,G.; Schreier,E.
Viral hepatitis constitutes a major health issue, with high prevalence among injecting drug users (IDUs). The present study assessed the prevalence and risk determinants for hepatitis B, C and D viruses (HBV, HCV and HDV) infections among 102 IDUs from Rio de Janeiro, Brazil. Serological markers and HCV-RNA were detected by enzyme immunoassay and nested PCR, respectively. HCV genotyping was determined by restriction fragment length polymorphism analysis (RFLP). HBsAg, anti-HBc and anti-HBs were found in 7.8, 55.8 and 24.7% of IDUs, respectively. In the final logistic regression, HBV infection was independently associated with male homosexual intercourse within the last 5 years (odds ratio (OR) 3.1; 95% confidence interval (CI) 1.1-8.8). No subject...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HBV; HDV; HCV; HCV genotypes; IDU.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000900009

Morphological changes in rat rectus abdominis muscle induced by diabetes and pregnancy
Provedor de dados: 56
Autores: Vesentini,G.; Marini,G.; Piculo,F.; Damasceno,D.C.; Matheus,S.M.M.; Felisbino,S.L.; Calderon,I.M.P.; Hijaz,A.; Barbosa,A.M.P.; Rudge,M.V.C.
The urethral muscle of diabetic pregnant rats is affected by long-term mild diabetes and short-term severe diabetes, which plays a crucial role in the pathogenesis of pelvic floor disorders. We hypothesized that muscles outside the pelvis are subject to similar changes. The current study aimed at analyzing the effects of long-term mild and short-term severe diabetes on the structure and ultrastructure of fiber muscles and collagen in rats' rectus abdominis (RA) muscle. Therefore, the RA muscle of virgin, pregnant, long-term mild diabetic, short-term severe diabetic, long-term mild diabetic pregnant and short-term severe diabetic pregnant 3-month-old Wistar rats were collected. The structure was analyzed by picrosirius red staining, immunohistochemistry for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diabetes; Pregnancy; Collagen; Skeletal muscle; Rats.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000400611

The modulation of simple reaction time by the spatial probability of a visual stimulus
Provedor de dados: 56
Autores: Carreiro,L.R.R.; Haddad Jr.,H.; Baldo,M.V.C.
Simple reaction time (SRT) in response to visual stimuli can be influenced by many stimulus features. The speed and accuracy with which observers respond to a visual stimulus may be improved by prior knowledge about the stimulus location, which can be obtained by manipulating the spatial probability of the stimulus. However, when higher spatial probability is achieved by holding constant the stimulus location throughout successive trials, the resulting improvement in performance can also be due to local sensory facilitation caused by the recurrent spatial location of a visual target (position priming). The main objective of the present investigation was to quantitatively evaluate the modulation of SRT by the spatial probability structure of a visual...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Simple reaction time; Spatial probability; Vision; Attention.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000700011

Prevalence and conditions associated with chronic pelvic pain in women from São Luís, Brazil
Provedor de dados: 56
Autores: Coelho,L.S.C.; Brito,L.M.O.; Chein,M.B.C.; Mascarenhas,T.S.; Costa,J.P.L.; Nogueira,A.A.; Poli-Neto,O.B.
The objective of the present study was to estimate the prevalence of chronic pelvic pain in the community of São Luís, capital of the State of Maranhão, Northeastern Brazil, and to identify independent conditions associated with it. A cross-sectional study was conducted, including a sample of 1470 women older than 14 years predominantly served by the public health system. The interviews were held in the subject's home by trained interviewers not affiliated with the public health services of the municipality. The homes were visited at random according to the city map and the prevalence of the condition was estimated. To identify the associated conditions, the significant variables (P=0.10) were selected and entered in a multivariate analysis model. Data are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chronic pelvic pain; Prevalence; Dyspareunia; Dysmenorrhea.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000900818

Prenatal and postnatal depression among low income Brazilian women
Provedor de dados: 56
Autores: Da-Silva,V.A.; Moraes-Santos,A.R.; Carvalho,M.S.; Martins,M.L.P.; Teixeira,N.A.
Postnatal depression is a significant problem affecting 10-15% of mothers in many countries and has been the subject of an increasing number of publications. Prenatal depression has been studied less. The aims of the present investigation were: 1) to obtain information on the prevalence of prenatal and postnatal depression in low income Brazilian women by using an instrument already employed in several countries, i.e., the Edinburgh Postnatal Depression Scale (EPDS); 2) to evaluate the risk factors involved in prenatal and postnatal depression in Brazil. The study groups included 33 pregnant women interviewed at home during the second and third trimesters of pregnancy, and once a month during the first six months after delivery. Questions on life events...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Depression; Pregnancy; Postnatal depression; Maternal depression.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000600012

Luteal phase of the menstrual cycle increases sweating rate during exercise
Provedor de dados: 56
Autores: Garcia,A.M.C.; Lacerda,M.G.; Fonseca,I.A.T.; Reis,F.M.; Rodrigues,L.O.C.; Silami-Garcia,E.
The present study evaluated whether the luteal phase elevation of body temperature would be offset during exercise by increased sweating, when women are normally hydrated. Eleven women performed 60 min of cycling exercise at 60% of their maximal work load at 32ºC and 80% relative air humidity. Each subject participated in two identical experimental sessions: one during the follicular phase (between days 5 and 8) and the other during the luteal phase (between days 22 and 25). Women with serum progesterone &gt;3 ng/mL, in the luteal phase were classified as group 1 (N = 4), whereas the others were classified as group 2 (N = 7). Post-exercise urine volume (213 ± 80 vs 309 ± 113 mL) and specific urine gravity (1.008 ± 0.003 vs 1.006 ± 0.002) changed (P &lt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermoregulation; Sweating rate; Exercise; Menstrual cycle; Body temperature.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000900014

A Brazilian family with hereditary inclusion body myopathy associated with Paget disease of bone and frontotemporal dementia
Provedor de dados: 56
Autores: Fanganiello,R.D.; Kimonis,V.E.; Côrte,C.C.; Nitrini,R.; Passos-Bueno,M.R.
Inclusion body myopathy associated with Paget disease and frontotemporal dementia (IBMPFD) is a progressive and usually misdiagnosed autosomal dominant disorder. It is clinically characterized by a triad of features: proximal and distal myopathy, early onset Paget disease of bone (PDB), and frontotemporal dementia (FTD). It is caused by missense mutations in the valosin-containing protein (VCP) gene. We describe here the clinical and molecular findings of the first Brazilian family identified with IBMPFD. Progressive myopathy affecting the limb girdles was detected by clinical examination followed by muscle biopsy and creatine kinase measurement. PDB was suggested after anatomopathological bone examination and FTD was diagnosed by clinical,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Frontotemporal dementia; VCP gene mutations; Myopathy; Paget disease of bone.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000400016

Transcriptomic differential lncRNA expression is involved in neuropathic pain in rat dorsal root ganglion after spared sciatic nerve injury
Provedor de dados: 56
Autores: Mao,P.; Li,C.R.; Zhang,S.Z.; Zhang,Y.; Liu,B.T.; Fan,B.F.
Dorsal root ganglia (DRG) neurons regenerate spontaneously after traumatic or surgical injury. Long noncoding RNAs (lncRNAs) are involved in various biological regulation processes. Conditions of lncRNAs in DRG neuron injury deserve to be further investigated. Transcriptomic analysis was performed by high-throughput Illumina HiSeq2500 sequencing to profile the differential genes in L4–L6 DRGs following rat sciatic nerve tying. A total of 1,228 genes were up-regulated and 1,415 down-regulated. By comparing to rat lncRNA database, 86 known and 26 novel lncRNA genes were found to be differential. The 86 known lncRNA genes modulated 866 target genes subject to gene ontology (GO) and KEGG enrichment analysis. The genes involved in the neurotransmitter status of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spared nerve injury; Neuropathic pain; Long noncoding RNA; Transcriptome; Hypm gene.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018001000601

Functional changes of human quadriceps muscle injured by eccentric exercise
Provedor de dados: 56
Autores: Serrão,F.V.; Foerster,B.; Spada,S.; Morales,M.M.B.; Monteiro-Pedro,V.; Tannús,A.; Salvini,T.F.
The present study evaluated functional changes of quadriceps muscle after injury induced by eccentric exercise. Maximal isometric torque of quadriceps and the surface electromyography (root mean square, RMS, and median frequency, MDF) of the vastus medialis oblique (VMO) and vastus lateralis (VL) muscles were examined before, immediately after and during the first 7 days after injury. Serum creatine kinase (CK) levels and magnetic resonance imaging (MRI) were used to identify muscle injury. The subject was used as her own control and percent refers to pre-injury data. Experiments were carried out with a sedentary 23-year-old female. Injury was induced by 4 bouts of 15 maximal isokinetic eccentric contractions (angular velocity of 5º/s; range of motion from...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Isometric torque; Surface electromyography; Quadriceps muscle; Muscle injury; Eccentric exercise; Magnetic resonance imaging.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000600014

Neonatal screening for cystic fibrosis in São Paulo State, Brazil: a pilot study
Provedor de dados: 56
Autores: Rodrigues,R.; Magalhaes,P.K.R.; Fernandes,M.I.M.; Gabetta,C.S.; Ribeiro,A.F.; Pedro,K.P.; Valdetaro,F.; Santos,J.L.F.; Souza,R.M. de; Pazin Filho,A.; Maciel,L.M.Z.
Cystic fibrosis is one of the most common autosomal recessive hereditary diseases in the Caucasian population, with an incidence of 1:2000 to 1:3500 liveborns. More than 1000 mutations have been described with the most common being F508del. It has a prevalence of 23-55% within the Brazilian population. The lack of population-based studies evaluating the incidence of cystic fibrosis in São Paulo State, Brazil, and an analysis concerning the costs of implantation of a screening program motivated the present study. A total of 60,000 dried blood samples from Guthrie cards obtained from April 2005 to January 2006 for neonatal screening at 4 reference centers in São Paulo State were analyzed. The immunoreactive trypsinogen (IRT)/IRT protocol was used with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cystic fibrosis; Neonatal screening; Immunoreactive trypsinogen test; Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001000017

A new model for the population pharmacokinetics of didanosine in healthy subjects
Provedor de dados: 56
Autores: Velasque,L.S.; Estrela,R.C.E.; Suarez-Kurtz,G.; Struchiner,C.J.
Didanosine (ddI) is a component of highly active antiretroviral therapy drug combinations, used especially in resource-limited settings and in zidovudine-resistant patients. The population pharmacokinetics of ddI was evaluated in 48 healthy volunteers enrolled in two bioequivalence studies. These data, along with a set of co-variates, were the subject of a nonlinear mixed-effect modeling analysis using the NONMEM program. A two-compartment model with first order absorption (ADVAN3 TRANS3) was fitted to the serum ddI concentration data. Final pharmacokinetic parameters, expressed as functions of the co-variates gender and creatinine clearance (CL CR), were: oral clearance (CL = 55.1 + 240 x CL CR + 16.6 L/h for males and CL = 55.1 + 240 x CL CR for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Didanosine; Pharmacokinetics; NONMEM.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000100013

Chlorpheniramine impairs functional recovery in Carassius auratus after telencephalic ablation
Provedor de dados: 56
Autores: Garção,D.C.; Canto-de-Souza,L.; Romaguera,F.; Mattioli,R.
We determined the effect of an H1 receptor antagonist on the functional recovery of Carassius auratus submitted to telencephalic ablation. Five days after surgery the fish underwent a spatial-choice learning paradigm test. The fish, weighing 6-12 g, were divided into four groups: telencephalic ablation (A) or sham lesion (S) and saline (SAL) or chlorpheniramine (CPA, ip, 16 mg/kg). For eight consecutive days each animal was trained individually in sessions separated by 24 h (alternate days). Training trials (T1-T8) consisted of finding the food in one of the feeders, which were randomly blocked for each subject. Animals received an intraperitoneal injection of SAL or CPA 10 min after the training trials. The time spent by the animals in each group to find...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Functional recovery; Spatial-choice learning; Histamine; Chlorpheniramine; Carassius auratus; Telencephalic ablation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000400010

Retinol-induced changes in the phosphorylation levels of histones and high mobility group proteins from Sertoli cells
Provedor de dados: 56
Autores: Moreira,J.C.F.; Dal-Pizzol,F.; Rocha,A.B.; Klamt,F.; Ribeiro,N.C.; Ferreira,C.J.S.; Bernard,E.A.
Chromatin proteins play a role in the organization and functions of DNA. Covalent modifications of nuclear proteins modulate their interactions with DNA sequences and are probably one of the multiple factors involved in the process of switch on/off transcriptionally active regions of DNA. Histones and high mobility group proteins (HMG) are subject to many covalent modifications that may modulate their capacity to bind to DNA. We investigated the changes induced in the phosphorylation pattern of cultured Wistar rat Sertoli cell histones and high mobility group protein subfamilies exposed to 7 µM retinol for up to 48 h. In each experiment, 6 h before the end of the retinol treatment each culture flask received 370 KBq/ml [32P]-phosphate. The histone and HMGs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sertoli cells; Phosphorylation; Histones; High mobility group proteins; Retinol.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000300005

Anti-Leishmania titers and positive skin tests in patients cured of kala-azar
Provedor de dados: 56
Autores: Viana,G.M.C.; Nascimento,M.D.S.B.; Diniz Neto,J.A.; Rabelo,E.M.F.; Binda Júnior,J.R.; Santos Júnior,O.M.; Santos,A.C.; Galvão,C.S.; Guimarães,R.S.
Visceral leishmaniasis (VL), also known as kala-azar, is an important public health problem. If not treated, virtually all clinically symptomatic patients die within months. The diagnosis is based on the Montenegro skin test (MST) and anti-Leishmania titers. Nevertheless, the time required for cured individuals living in a leishmaniasis-endemic area to present a positive skin test and negative anti-Leishmania serology is known. To determine the cellular and humoral immune response profile in relation to different times post-VL cure, a cross-sectional study was conducted on subjects from a kala-azar endemic area in Paço do Lumiar, MA, Brazil, on the basis of 1995-2005 notifications reported by the National Health Foundation/Regional Coordination of...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Human visceral leishmaniasis; Montenegro’s intradermal reaction; Indirect immunofluorescence.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000100009

Rat Dlx5 is expressed in the subventricular zone and promotes neuronal differentiation
Provedor de dados: 56
Autores: Shu,H.F.; Gao,F.Y.; Zhang,C.Q.; Liu,S.Y.; Zhang,Z.Y.; Song,Y.C.; Qiu,K.J.; Yang,H.
The molecular mechanisms and potential clinical applications of neural precursor cells have recently been the subject of intensive study. Dlx5, a homeobox transcription factor related to the distal-less gene in Drosophila, was shown to play an important role during forebrain development. The subventricular zone (SVZ) in the adult brain harbors the largest abundance of neural precursors. The anterior SVZ (SVZa) contains the most representative neural precursors in the SVZ. Further research is necessary to elucidate how Dlx5-related genes regulate the differentiation of SVZa neural precursors. Here, we employed immunohistochemistry and molecular biology techniques to study the expression of Dlx5 and related homeobox genes Er81 and Islet1 in neonatal rat...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neural precursors; Dlx5; Green fluorescent protein; Recombinant plasmids.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000200008

A randomized crossover clinical study showing that methylphenidate-SODAS improves attention-deficit/hyperactivity disorder symptoms in adolescents with substance use disorder
Provedor de dados: 56
Autores: Szobot,C.M.; Rohde,L.A.; Katz,B.; Ruaro,P.; Schaefer,T.; Walcher,M.; Bukstein,O.; Pechansky,F.
Our objective was to evaluate the effectiveness of a long-acting formulation of methylphenidate (MPH-SODAS) on attention-deficit/hyperactivity disorder (ADHD) symptoms in an outpatient sample of adolescents with ADHD and substance use disorders (SUD). Secondary goals were to evaluate the tolerability and impact on drug use of MPH-SODAS. This was a 6-week, single-blind, placebo-controlled crossover study assessing efficacy of escalated doses of MPH-SODAS on ADHD symptoms in 16 adolescents with ADHD/SUD. Participants were randomly allocated to either group A (weeks 1-3 on MPH-SODAS, weeks 4-6 on placebo) or group B (reverse order). The primary outcome measures were the Swanson, Nolan and Pelham Scale, version IV (SNAP-IV) and the Clinical Global Impression...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Attention deficit/hyperactivity disorder; Methylphenidate; Substance use disorder; Treatment; Adolescents.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000300012

Reproducibility of heart rate variability parameters measured in healthy subjects at rest and after a postural change maneuver
Provedor de dados: 56
Autores: Dantas,E.M.; Gonçalves,C.P.; Silva,A.B.T.; Rodrigues,S.L.; Ramos,M.S.; Andreão,R.V.; Pimentel,E.B.; Lunz,W.; Mill,J.G.
Heart rate variability (HRV) provides important information about cardiac autonomic modulation. Since it is a noninvasive and inexpensive method, HRV has been used to evaluate several parameters of cardiovascular health. However, the internal reproducibility of this method has been challenged in some studies. Our aim was to determine the intra-individual reproducibility of HRV parameters in short-term recordings obtained in supine and orthostatic positions. Electrocardiographic (ECG) recordings were obtained from 30 healthy subjects (20-49 years, 14 men) using a digital apparatus (sampling ratio = 250 Hz). ECG was recorded for 10 min in the supine position and for 10 min in the orthostatic position. The procedure was repeated 2-3 h later. Time and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heart rate variability; Power spectral analysis; Reproducibility; Autonomic nervous system.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001000010

Obese women on a low energy rice and bean diet: effects of leucine, arginine or glycine supplementation on protein turnover
Provedor de dados: 56
Autores: Marchini,J.S.; Lambertini,C.R.; Ferriolli,E.; Dutra de Oliveira,J.E.
This study examined if leucine, arginine or glycine supplementation in adult obese patients (body mass index of 33 ± 4 kg/m²) consuming a Brazilian low energy and protein diet (4.2 MJ/day and 0.6 g protein/kg) affects protein and amino acid metabolism. After four weeks adaptation to this diet, each subject received supplements of these amino acids (equivalent to 0.2 g protein kg-1 day-1) in random order. On the seventh day of each amino acid supplementation, a single-dose 15N-glycine study was carried out. There were no significant differences in protein flux, synthesis or breakdown. The protein flux (grams of nitrogen, gN/9 h) was 55 ± 24 during the nonsupplemented diet intake and 39 ± 10, 44 ± 22 and 58 ± 35 during the leucine-, glycine- and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Obese women; Protein; Glycine; Arginine; Leucine; Stable isotope.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001000007

Reference value of brachial-ankle pulse wave velocity for the eastern Chinese population and potential influencing factors
Provedor de dados: 56
Autores: Zi-Sheng,Ai; Jue,Li; Zhong-Min,Liu; Hui-Min,Fan; Zhang,Dai-Fu; Yun,Zhu; Zhang,Li-Juan; Zhu,Wen-Qing; Bao,Yan.
The present study was conducted to obtain reference values for brachial-ankle pulse wave velocity (baPWV) and to evaluate influencing factors of baPWV according to gender. Using automatic devices, baPWV was measured simultaneously in 2095 subjects. A total of 647 healthy subjects, none of whom presented atherosclerotic risk factors, were analyzed in the present study. Two different statistical methods were used to obtain reference values for baPWV according to subject gender and age. The association between baPWV value and gender, as well as other features, were analyzed. For male subjects, multiple stepwise analysis showed that age, systolic blood pressure (SBP), heart rate (HR), and plasma levels of triglycerides (TG) were independent predictors of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pulse wave velocity; Reference value; Age; Gender; Influencing factor.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001000004

Variations in gastric emptying of liquid elicited by acute blood volume changes in awake rats
Provedor de dados: 56
Autores: Gondim,F. de-A.A.; Oliveira,G.R. de-; Graça,J.R.V.; Cavalcante,D.I.M.; Souza,M.A.N.; Santos,A.A.; Rola,F.H.
We have observed that acute blood volume expansion increases the gastroduodenal resistance to the flow of liquid in anesthetized dogs, while retraction decreases it (Santos et al. (1991) Acta Physiologica Scandinavica, 143: 261-269). This study evaluates the effect of blood volume expansion and retraction on the gastric emptying of liquid in awake rats using a modification of the technique of Scarpignato (1980) (Archives Internationales de Pharmacodynamie et de Therapie, 246: 286-294). Male Wistar rats (180-200 g) were fasted for 16 h with water ad libitum and 1.5 ml of the test meal (0.5 mg/ml phenol red solution in 5% glucose) was delivered to the stomach immediately after random submission to one of the following protocols: 1) normovolemic control (N =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blood volume; Hypervolemia; Hemorrhage; Central venous pressure; Gastric emptying; Gastrointestinal motility.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000700013

Importance of the putative furin recognition site 742RNRR745 for antiangiogenic Sema3C activity in vitro
Provedor de dados: 56
Autores: Valiulyte,I.; Preitakaite,V.; Tamasauskas,A.; Kazlauskas,A.
Angiogenesis is one of the key processes in the growth and development of tumors. Class-3 semaphorins (Sema3) are characterized as axon guidance factors involved in tumor angiogenesis by interacting with the vascular endothelial growth factor signaling pathway. Sema3 proteins convey their regulatory signals by binding to neuropilins and plexins receptors, which are located on the effector cell. These processes are regulated by furin endoproteinases that cleave RXRR motifs within the Sema, plexin-semaphorins-integrin, and C-terminal basic domains of Sema3 protein. Several studies have shown that the furin-mediated processing of the basic domain of Sema3F and Sema3A is critical for association with receptors. It is unclear, however, if this mechanism can...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Semaphorin; Sema3C; HUVEC; Angiogenesis; Furin-like pro-protein convertases.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018001100610

Prevalence of "non-oral" pathogenic bacteria in subgingival biofilm of subjects with chronic periodontitis
Provedor de dados: 58
Autores: Souto,Renata; Andrade,Arnaldo Feitosa B. de; Uzeda,Milton; Colombo,Ana Paula Vieira.
The oral cavity may act as a reservoir for several pathogens related to systemic infections. Therefore, the purpose of this study was to determine the prevalence and levels of pathogenic bacteria in the subgingival biofilm of chronic periodontitis lesions and healthy periodontal sites using the checkerboard DNA-DNA hybridization technique. 200 samples of subgingival biofilm from sites with periodontitis (probing pocket depth &gt; 4 mm and /or clinical attachment level &gt; 4 mm) and 200 samples from healthy sites of 14 patients with chronic periodontitis, as well as 200 samples from 3 periodontally healthy patients were obtained. The presence and levels of 11 pathogenic bacteria were determined using whole genomic DNA probes and the checkerboard method,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: "non-oral" bacteria; Periodontal disease; Checkerboard; DNA probes.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000300002

Epidemiological Survey of Listeria monocytogenes in a gravlax salmon processing line
Provedor de dados: 58
Autores: Cruz,C.D.; Silvestre,F.A.; Kinoshita,E.M.; Landgraf,M.; Franco,B.D.G.M.; Destro,M.T.
Listeria monocytogenes is a cause of concern to food industries, mainly for those producing ready-to-eat (RTE) products. This microorganism can survive processing steps such as curing and cold smoking and is capable of growing under refrigeration temperatures. Its presence in RTE fish products with extended shelf life may be a risk to the susceptible population. One example of such a product is gravlax salmon; a refrigerated fish product not exposed to listericidal processes and was the subject of this study. In order to evaluate the incidence and dissemination of L. monocytogenes 415 samples were collected at different steps of a gravlax salmon processing line in São Paulo state, Brazil. L. monocytogenes was confirmed in salmon samples (41%), food contact...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Listeria monocytogenes; Gravlax salmon; PFGE.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000200032

Average bioequivalence of single 500 mg doses of two oral formulations of levofloxacin: a randomized, open-label, two-period crossover study in healthy adult Brazilian volunteers
Provedor de dados: 60
Autores: Kano,Eunice Kazue; Koono,Eunice Emiko Mori; Schramm,Simone Grigoleto; Serra,Cristina Helena dos Reis; Abib Junior,Eduardo; Pereira,Renata; Freitas,Márcia Sayuri Takamatsu; Iecco,Maria Cristina; Porta,Valentina.
Average bioequivalence of two 500 mg levofloxacin formulations available in Brazil, Tavanic(c) (Sanofi-Aventis Farmacêutica Ltda, Brazil, reference product) and Levaquin(c) (Janssen-Cilag Farmacêutica Ltda, Brazil, test product) was evaluated by means of a randomized, open-label, 2-way crossover study performed in 26 healthy Brazilian volunteers under fasting conditions. A single dose of 500 mg levofloxacin tablets was orally administered, and blood samples were collected over a period of 48 hours. Levofloxacin plasmatic concentrations were determined using a validated HPLC method. Pharmacokinetic parameters Cmax, Tmax, Kel, T1/2el, AUC0-t and AUC0-inf were calculated using noncompartmental analysis. Bioequivalence was determined by calculating 90%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Levofloxacin/bioequivalence; Pharmacokinetics; High-performance liquid chromatography/qualitative analysis; Tavanic(c)/bioequivalence; Levaquin(c)/bioequivalence.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502015000100203

Possible pharmacological interactions in hypertensive and/or diabetic elderly in family health units at Blumenau (SC)
Provedor de dados: 60
Autores: Codagnone Neto,Vicente; Garcia,Victor Pundek; Santa Helena,Ernani Tiaraju de.
The aim of this study was to examine the possible adverse drug-drug interactions in the elderly population (&gt;60 years) diagnosed either with diabetes, arterial hypertension or both, at a Family Health Unit (FHU) clinic in Blumenau, state of Santa Catarina, Brazil. For this purpose 318 subjects were interviewed using a pretested form with social and demographic aspects regarding their disease and its complications. All drugs used by this population were grouped, and the drug-drug interactions were detected by using the "Drug Interaction Checker" software, and classified for frequency and severity. The average age of patients was 70.6 years, with a higher number of female patients (216; 67.9%). Most subjects were being treated for both diseases (149;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drug-drug interaction; Systemic arterial hypertension/use of medications; Diabetes Mellitus/use of medications; Elderly/use of medications; Family health program.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502010000400022

Up-regulation of human immune system function by Donkey’s Milk
Provedor de dados: 60
Autores: Taghiloo,Saeid; Allahmoradi,Esmaeil; Sadeghian-Kiadehi,Seyedeh Forough; Omrani-Nava,Versa; Nazar,Eisa; Ebrahimzadeh,Mohammad Ali.
Donkey’s milk represents a good alternative to human milk because of its chemical characteristics similar to those of human’s. In present study, the pro- and anti-inflammatory effects of donkey’s milk were evaluated on peripheral blood mononuclear cells (PBMCs). PBMCs were isolated from 12 young and 12 aged normal subjects. PBMCs were cultured with or without the optimal and non-cytotoxic dose of pasteurized donkey’s milk, and polymyxin B was used to inhibit the possible endotoxin contamination. Following 18 hours incubation, culture supernatants were harvested to measure the secreted Tumor necrosis factor-α (TNF-α), Interleukin-6 (IL-6), Interleukin-8 (IL-8) and Interleukin-10 (IL-10) by ELISA. Donkey’s milk significantly increased TNF-α (p= 0.01), IL-8...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Donkey’s milk; ELISA; Immune system; Aged subject; Cytokine.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100607

Noncompliance with drug therapy of glaucoma: a review about intervening factors
Provedor de dados: 60
Autores: Castro,Aldemar Nemésio Brandão Vilela de; Mesquita,Wander Araújo.
Glaucoma is defined as an optic neuropathy, characterized for loss of visual field and injury of the optic nerve, being considered as the second cause of blindness in the world, which could be prevented by the use of antiglaucoma eyedrops. The lack of adhesion of the patient to the drug treatment can culminate with loss of the vision. The objective was to revise possible literature data regarding intervening factors for noncompliance and explain estimated rates of noncompliance. A systematic review about the subject was carried out in the period of January to June of 2006. Articles had been searched in two data bases, in the National Library of Medicine (PUBMED) and in the Literature Latin American and Caribbean Health Sciences (LILACS) using the following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glaucoma/drug treatment; Drug treatment/adhesion; Eyedrops/use; Eyedrops/evaluation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000300010

Ecophysiological responses to drought and salinity in the cosmopolitan invader Nicotiana glauca
Provedor de dados: 61
Autores: González,Armando; Tezara,Wilmer; Rengifo,Elizabeth; Herrera,Ana.
Nicotiana glauca, a shrub native to southern South America, is widely distributed in the Americas, from Patagonia to the USA, from zero up to 3,700 m; it rapidly invades disturbed environments. In Venezuela, it has been reported from zero up to 2,000 m growing in contrasting conditions of relative humidity, temperature, rainfall, and salinity. In order to gain insight into the extent and mode of resistance to drought and salinity in N. glauca, we studied the effect of these factors on water relations and photosynthesis under both natural and greenhouse conditions. In the field, water potential, photosynthetic rate (A) and stomatal conductance (gs), but not relative water content (RWC) decreased because of drought. Manual removal of epicuticular wax...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drought; Osmotic adjustment; Salinity; Water deficit.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000300008

Pretreatment with H2O2 in maize seeds: effects on germination and seedling acclimation to salt stress
Provedor de dados: 61
Autores: Gondim,Franklin A; Gomes-Filho,Enéas; Lacerda,Claudivan F; Prisco,José Tarquinio; Azevedo Neto,André D; Marques,Elton C.
The aim of this study was to evaluate the effects of H2O2 on germination and acclimation of maize plants subject to salt stress. Three experiments using BRS3003 seeds, a triple hybrid of maize, were carried out in a growth room and in greenhouse. In the first experiment, H2O2 accelerated the germination percentage of seeds at 100 mM, but not at 500 mM. In the second experiment, the pretreatment of seeds was observed to induce a pronounced increase in ascorbate peroxidase (APX) and catalase (CAT) enzyme activity after 30 h of soaking in H2O2. It was also observed that guaiacol peroxidase (GPX) activity was smaller in the seeds soaked in H2O2 for 12, 24, 30, 36 and 42 h, in relation to those soaked in distilled water. The superoxide dismutase (SOD) activity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; Hydrogen peroxide; Oxidative stress; Salinity stress; Zea mays.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000200004

Locas y fuertes : cuerpos precarios en el Guayaquil del siglo XXI (Dossier)
Provedor de dados: 122
Autores: Sancho Ord????ez, Fernando.
Este art??culo realiza una aproximaci??n a las formas en que son construidos los cuerpos de quienes cuyas identidades sexuales y de g??nero no est??n sujetas a un modelo heteronormativo predominante dentro del contexto local de la ciudad de Guayaquil. A trav??s de conceptos como performatividad,  precariedad y abyecci??n propuestos por Judith Butler, se intenta explicar las formas  c??mo los cuerpos de quienes subvierten el sistema dominante de sexo y g??nero han sido excluidos del espacio p??blico de una ciudad que al empezar el siglo XXI inici?? un proceso de ???regeneraci??n urbana???. Se muestra adem??s c??mo las diferencias de clase y raza repercuten en el desplazamiento de estas identidades por parte de hombres de clase media que se identifican como...
Tipo: Revista
Palavras-chave: HUMILLACI??N; GAYS; HETERONORMATIVIDAD; LOCAS; PERFORMATIVIDAD; PRECARIEDAD; REGENERACI??N URBANA.
Ano: 2011
URL: http://hdl.handle.net/10469/2706

Delincuencia sexual y populismo penal en Colombia (Investigación)
Provedor de dados: 122
Autores: Velandia Montes, Rafael.
Actualmente hay un uso recurrente del Derecho Penal como instrumento estatal para enfrentar conflictos sociales variados. Modificaciones legislativas son hechas sin consideración a su necesidad y eficacia y se busca satisfacer intereses particulares, no la solución de conflictos sociales.  Un actor de primer orden, aunque no el único, en el uso excesivo del Derecho Penal está constituido por los políticos, que, en busca de prestigio político con fines electorales, continuamente formulan propuestas de reforma legal que aumentan el campo de acción del Derecho Penal. Este aumento genera consecuencias negativas como sobrecarga de trabajo y un mayor desprestigio a una ya congestionada y bastante desacreditada justicia penal. Esta tendencia, denominada populismo...
Tipo: Artículo
Palavras-chave: POLICÍA PENAL; DERECHO PENAL; SISTEMA DE JUSTICIA PENAL; POPULISMO PENAL; DELINCUENCIA SEXUAL; CRIMINAL POLICY; CRIMINAL LAW; CRIMINAL JUSTICE SYSTEM; PENAL POPULISM; SEXUAL DELINQUENCY.
Ano: 2012
URL: http://hdl.handle.net/10469/3965

La institución matrimonial después del matrimonio homosexual (Dossier) = The institution of marriage after same-sex marriage
Provedor de dados: 122
Autores: Gimeno, Beatriz; Barrientos, Violeta.
Este artículo sostiene la idea de que el reconocimiento del matrimonio homosexual, conseguido por el movimiento LGTB español en ese país, constituye una reforma no reformista. Es decir, antes que una reivindicación conservadora, que actualiza los sentidos naturalizados en el matrimonio al imponerlos a nuevos sujetos (homosexuales), constituye un mecanismo hacia su des-institucionalización. Se trataría de una reivindicación que al tiempo que afirma la plena ciudadanía de los grupos LGTB, es decir, su reconocimiento social, deconstruye el matrimonio a través de un doble movimiento. Primero, la comprensión de esta institución como cultural y socialmente construida y por tanto, sujeta a sucesivas modificaciones a lo largo de su historia. Dos, siendo el...
Tipo: Artículo
Palavras-chave: MATRIMONIO HOMOSEXUAL RECONOCIMIENTO SOCIAL HOMOSEXUALIDAD DERECHOS MOVIMIENTO LGTB FAMILIA ESPAÑA MARRIAGE HOMOSEXUALITY RIGHTS LGBT MOVEMENT FAMILY SPAIN MOVIMIENTO LÉSBICO; GAY; BISEXUAL; TRANSGÉNERO E INTERSEXUAL (LGTBI).
Ano: 2009
URL: http://hdl.handle.net/10469/906

El nuevo debate sobre soberanía alimentaria (Políticas Públicas)
Provedor de dados: 122
Autores: Rosero Garcés, Fernando.
En Ecuador ya tuvimos dos rondas de debate sobre la soberanía alimentaria y sus sentidos. La primera disputa se produjo en la Asamblea Nacional Constituyente, ANC, en los meses de mayo y junio de 2008, cuando las mesas seis y nueve discutieron las propuestas enviadas por diversos sectores de la sociedad. Contrariamente a lo esperado, en la mesa seis no prevaleció la propuesta elaborada por los asesores del Partido Socialista ni tampoco la formulada participativamente por la sociedad civil, sino el texto de un supuesto emisario del presidente Correa. En el primer documento aprobado por la mesa seis no se estableció la obligación del Estado para la ejecución de la política de soberanía alimentaria y se escamotearon los temas de tierra y transgénicos. El...
Tipo: Artículo
Palavras-chave: SOBERANÍA ALIMENTARIA; PARTIDO SOCIALISTA; TRANSGÉNICOS; ORGANIZACIONES SOCIALES; CAMPESINOS; INDÍGENAS; SUJETOS DE DERECHO; COMUNIDADES; NACIONALIDADES; NEOLIBERALISMO; PRODUCCIÓN; COMERCIALIZACIÓN; CONSUMO RESPONSABLE; CRÉDITO; PROGRAMAS SOCIALES; ECUADOR; FOOD SOVEREIGNTY; SOCIALIST PARTY; TRANSGENIC; SOCIAL ORGANIZATIONS; FARMERS; INDIGENOUS; SUBJECT OF LAW; COMMUNITIES; NATIONALITIES; NEOLIBERALISM; PRODUCTION; MARKETING; RESPONSIBLE  CONSUMPTION; CREDIT; SOCIAL PROGRAMS.
Ano: 2008
URL: http://hdl.handle.net/10469/4846

El Movimiento Bolivariano en Venezuela: ¿de vuelta al populismo? (Debate)
Provedor de dados: 122
Autores: Mendes, Flávio da Silva.
En 1999, la llegada de Hugo Chávez a la presidencia significó un cambio importante en la política de Venezuela: desde 1957, era la primera vez que el cargo sería ocupado por alguien que no pertenecía a los partidos tradicionales del país. El nuevo mandatario presentaba un perfil que recordaba a los antiguos líderes políticos latinoamericanos; y así el fenómeno Chávez fue presentado, por un gran número de científicos sociales, como el retorno a un viejo problema del continente: el populismo. En este artículo discuto algunas ventajas y desventajas que la revisión de ese concepto trae para la literatura dirigida a interpretar el actual gobierno venezolano; con este fin, me concentro en obras recientes de autores reconocidos y algunos textos clásicos, que aún...
Tipo: Artículo
Palavras-chave: POLITICA Y GOBIERNO; VENEZUELA; CRISIS; DEMOCRACIA; POPULISMO; POLICY AND GOVERNMENT; DEMOCRACY; POPULISM.
Ano: 2010
URL: http://hdl.handle.net/10469/2582

Prensa escrita y discurso nacionalista : representaciones de la guerra del Cenepa en febrero de 1995
Provedor de dados: 122
Autores: Burneo Sevilla, María Fernanda.
La tesis que presento a continuación, es una investigación trabajada desde el análisis de los discursos sobre las imágenes de la Guerra del Cenepa, ocurrida en febrero de 1995. Es un caso de estudio, a partir de un método arqueológico de análisis de las imágenes, que busca deducir cuáles han sido las diferentes estructuras simbólicas que permiten la legitimación de determinados discursos nacionalistas en el Ecuador, a partir de la prensa escrita. Este es un estudio que cruza cuatro líneas teóricas: la construcción del sujeto social (Lacan, 2003, 2004; Austin, 1990; Saussure, 2007; Hall, 1997; Foucault, 1999, 1991); el discurso como performance (Hall, 1997; Gutiérrez, 2004; Foucault, 1999, 1997, 1975, 1991; Muratorio,1994; Prieto, 2004; Núñez Sánchez, 1999;...
Tipo: Tesis
Palavras-chave: PRENSA ESCRITA; GUERRA DEL CENEPA; SUJETO SOCIAL; NACIÓN; REPRESENTACIONES; IMÁGENES; RECONSTRUCCIONES; QUITO; GUAYAQUIL; ECUADOR; PRINT MEDIA; WAR CENEPA; SOCIAL SUBJECT; NATION; REPRESENTATIONS; IMAGES; RECONSTRUCTIONS.
Ano: 2011
URL: http://hdl.handle.net/10469/3876

Glocalidad y reforma agraria : ¿de nuevo el problema irresuelto de la tierra? (Dossier)
Provedor de dados: 122
Autores: Solo de Zaldívar, Victor Bretón.
“ Reforma agraria” fue una expresión mágica en el mundo del desarrollo rural latinoamericano durante décadas. En los últimos veite años, sin embargo, se la ha considerado como un tema inviable en los escenarios de la globalización. El objeto del arículo es, no tanto proponer un balance exhaustivo de lo que supuso la era reformista, como señalar sus “luces” (su contribución a la modernización de las estructuras agrarias) y sus “sombras” (la situación en que quedó un porcentaje significativo de la población campesina). Más allá de las interpretaciones convencionales, se pone énfasis en la importancia de analizar algunos de los efectos nunca previstos –sobre todo en el ámbito de la redefinición de los actores sociales– y traer a colación qué de retórico y qué...
Tipo: Artículo
Palavras-chave: REFORMA AGRARIA; CAMPESINADO; MOVIMIENTOS SOCIALES; GLOBALIZACIÓN; GLOCALIDAD; PEASANTRY; SOCIAL MOVEMENTS; GLOBALIZATION; AGRARIAN REFORM.
Ano: 2006
URL: http://hdl.handle.net/10469/702

Organizaciones y Problemas Sociales. Una aproximación sistémica (Temas)
Provedor de dados: 122
Autores: Gonnet, Juan Pablo.
Este trabajo indaga teóricamente acerca de las relaciones entre organizaciones y problemas sociales (problemas de la sociedad). Una observación constante en los estudios sociológicos sobre la materia ha sido la distorsión entre fines y acciones organizacionales. Es decir, las organizaciones en su actividad y operación dejan de lado la finalidad (resolución de la problemática) para la que habían sido constituidas bajo criterios de auto-reproducción. Dada la generalidad de estos resultados, nos interesamos por reflexionar teóricamente sobre los supuestos que se encuentran detrás de este modo de observar a las organizaciones (sus condiciones de posibilidad). Con este fin, presentamos tres estudios de caso de organizaciones dedicadas al tratamiento de...
Tipo: Artículo
Palavras-chave: ORGANIZACIÓN; PROBLEMAS SOCIALES; SISTEMA SOCIALES; OBSERVACIÓN; ORGANIZATION; SOCIAL PROBLEMS; SOCIAL SYSTEMS; OBSERVATION.
Ano: 2011
URL: http://hdl.handle.net/10469/3351

Delincuencia sexual y populismo penal en Colombia (Investigación)
Provedor de dados: 122
Autores: Velandia Montes, Rafael.
Actualmente hay un uso recurrente del Derecho Penal como instrumento estatal para enfrentar conflictos sociales variados. Modificaciones legislativas son hechas sin consideración a su necesidad y eficacia y se busca satisfacer intereses particulares, no la solución de conflictos sociales.  Un actor de primer orden, aunque no el único, en el uso excesivo del Derecho Penal está constituido por los políticos, que, en busca de prestigio político con fines electorales, continuamente formulan propuestas de reforma legal que aumentan el campo de acción del Derecho Penal. Este aumento genera consecuencias negativas como sobrecarga de trabajo y un mayor desprestigio a una ya congestionada y bastante desacreditada justicia penal. Esta tendencia, denominada populismo...
Tipo: Artículo
Palavras-chave: POLICÍA PENAL; DERECHO PENAL; SISTEMA DE JUSTICIA PENAL; POPULISMO PENAL; DELINCUENCIA SEXUAL; CRIMINAL POLICY; CRIMINAL LAW; CRIMINAL JUSTICE SYSTEM; PENAL POPULISM; SEXUAL DELINQUENCY.
Ano: 2012
URL: http://hdl.handle.net/10469/3965

Water Erosion Prediction Using the Revised Universal Soil Loss Equation (RUSLE) in a GIS Framework, Central Chile
Provedor de dados: 117
Autores: Bonilla,Carlos A; Reyes,José L; Magri,Antoni.
Soil erosion is a growing problem in Central Chile, particularly in coastal dry lands, where it can significantly decrease the productivity of rainfed agriculture and forestry. In this study, the Revised Universal Soil Loss Equation (RUSLE) was integrated into a Geographic Information System (GIS), and used to evaluate the effects of different combinations of vegetative cover on soil erosion rates for Santo Domingo County in Central Chile. Implementing RUSLE in the GIS required a complete description of the county’s soils, climate, topography and current land use/land cover. This information was compiled in rasters of 25 x 25 m cells. RUSLE parameter values were assigned to each cell and annual soil loss estimates were generated on a cell by cell basis....
Tipo: Journal article
Palavras-chave: RUSLE; Water erosion; Soil conservation; Forestry; Changes in land use/land cover; Central Chile.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100017

Interactions entre pêcheries de lagunes, pêcheries côtières et pêche au chalut dans le golfe du Lion
Provedor de dados: 5
Autores: Farrugio, Henri; Le Corre, Gildas.
INTRODUCTION : This document is the final report concerning a study led on interactions between lagoon fisheries, coastal fisheries and trawl fishing in the Lion gulf.  If any of the three components mentioned above is able to catch species of interest (or none) to the other groups, other ones are of interest to at least two components. Furthermore, within each group, interactions between various fleet and/or trade can exist.  Interactions are more complex on account of the specific diversity of catches. If until 1984, trawler fleets were the subject of continuous studies, lagoon and coastal fleets were only considered on a one off basis... The goal of the work led by IFREMER concerning Mediterranean halieutic resources aims at obtaining basic elements...
Tipo: Text
Palavras-chave: Gulf of Lions; Trawling; Inshore fisheries; Fisheries of lagoons; Le golfe du Lion; Pêche au chalut; Pêcheries côtières; Pêcheries de lagunes.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/rapport-1655.pdf

Land Beneath the Waves. Submerged landscapes and sea level change. A joint geoscience-humanities strategy for European Continental Shelf Prehistoric Rese
Provedor de dados: 5
Autores: Flemming, Nicholas; Cagatay, M. Namik; Chiocci, Francesco Latino; Galanidou, Nena; Jons, Hauke; Lericolais, Gilles; Missiaen, Tine; Moore, Fionnbarr; Rosentau, Alar; Sakellariou, Dimitris; Skar, Brigitte; Stevenson, Alan; Weerts, Henk.
During the last one million years the land area of Europe was at times 40% larger than at present, and was usually 10-20% larger because of the global volumes of water locked up in ice-caps several kilometres thick on land. Our human precursors lived 200km inland from the coast of the Black Sea more than 1.5 million years ago, in northern Spain more than 1 million years ago, and on the British coast of the North Sea at least 800,000 years ago. Early tribes migrated from Africa through the Middle East, and then along the Mediterranean shore, as well as through central Europe, occupying northern territories when the ice melted and retreating southward when the ice expanded. These migrations across continental shelves, including the abandonment and...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00272/38363/36668.pdf

Editorial
Provedor de dados: 16
Autores: NN.
In 1968 we lost the last of the group of old-time botanists of the Treub period of the Botanic Gardens at Bogor, with the passing away of Prof. Dr. A. Ernst, of Zürich, Sept. 17th, 1968, in the age of 94. Apart from deafness he fortunately remained well until the last. We visited him Aug. 24, 1968, together with Prof. Dr. Markgraf, and it was remarkable to see how vividly he remembered details from his stays in Java. Born in Winterthur, 1875, he stayed most of his life in Zürich where he became an extra-ordinary professor of general botany in 1905, ordinary professor in 1909. He initiated his appointment with his first tour to Java, 1905/06, through a grant of the Swiss Buitenzorg Fund, where he travelled widely, also outside the island. In the company of...
Tipo: Article / Letter to the editor
Ano: 1969
URL: http://www.repository.naturalis.nl/record/533334

Agricultural economics and transition: What was expected, what we observed, the lessons learned  Proceedings (Volume I / II)
Provedor de dados: 31
Autores: Csaki,   Csaba; Forgacs,   Csaba; Koester,   Ulrich; Liefert,   William M.; Banse,   Martin; Gay,   Stephan Hubertus; McDonald,   Scott; M'Barek,   Robert; Swinnen,   Johan F.M.; Kim,   Hanho; An,   Donghwan; Hubbard,   Lionel J.; Rieger,   Laszlo; Szoke,   Gyula; Cristoiu,   Adriana; Udovc,   Andrej; Kagan,   Adam; Sassi,   Maria; Takacs,   Istvan; Takacs,   Emese; Cimpoies,   Dragos; Ertsey,   Imre; Kovacs,   Sandor; Przygodzka,   Renata; Dziemianowicz,   Ryta Iwona; Magda,   Robert; Borodina,   Elena; Borodina,   Alexandra; Gavrilescu,   Dinu; Pecze,   Denes; Balogh,   Peter; Cechura,   Lukas; Sayin,   Cengiz; Cengiz,   M. Nisa; Osanami,   Fumio; Szabo,   Gabor G.; Karaman,   Suleyman; Szekely,   Geza; Szczepaniak,   Iwona; Szczegolska,   Monika; Serova,   Eugenia; Pieniadz,   Agata; Barmon,   Basanta Kumar; Kondo,   Takumi; Becvarova,   Vera; Levkovych,   Inna; Hockmann,   Heinrich; Bezlepkina,   Irina V.; Kupavych,   Alexander; Konig,   Gabor; Halmai,   Peter; Vasary,   Viktoria; Vincze,   Maria-Magdolna; Lerman,   Zvi; Kolcsey,   Andrea; Bokusheva,   Raushan; Turtoi,   Crina Sinziana; Toma,   Camelia; Gavrilescu,   Camelia; Davidova,   Sophia; Blaas,   Gejza; Antonova,   Maria; Zeller,   Manfred; Deininger,   Klaus W.; Savastano,   Sara; Carletto,   Calogero; Caceres-Clavero,   Francisco; Lucena-Cobos,   Blanca; Latruffe,   Laure; Takacs-Gyorgy,   Katalin; Bandlerova,   Anna; Sadowski,   Adam; Gomez y Paloma,   Sergio; Luca,   Lucian; Cristoiu,   Adriana; Ciaian,   Pavel; Pokrivcak,   Jan; Drabik,   Dusan; Voneki,   Eva; Tonini,   Axel; Burger,   Anna; Szep,   Katalin; Majewski,   Edward; Raggi,   Meri; Viaggi,   Davide; Maccarini,   Elisa Ricci; Monasterolo,   Irene; Vandeplas,   Anneleen; Jongeneel,   Roelof A.; Novak,   Petr; Brasili,   Cristina; Meyer,   William H.; Kuhne,   Bianka; Fanfani,   Roberto; Gellynck,   Xavier; Molnar,   Adrienn; Gagalyuk,   Taras; Traikova,   Diana; Mollers,   Judith; Cochrane,   Nancy J.; Kazlauskiene,   Natalija; Fekete-Farkas,   Maria; Molnar,   Jozsef; Szucs,   Istvan; Popp,   Jozsef; Udovecz,   Gabor; Florkowski,   Wojciech J.; Fritzsch,   Jana; Buchenrieder,   Gertrud; Kasarjyan,   Milada; Podruzsik,   Szilard; Korff,   Rudiger; Wilkin,   Jerzy; van Leeuwen,   Myrna; Bartova,   Lubica; Erjavec,   Emil; Katona-Kovacs,   Judit; Baranyai,   Zsolt; Hubbard,   Carmen.
Over fifteen years have elapsed since the transition from the centrally planned economic system started in the early 1990’s. During this time agricultural and rural areas of Central and Eastern Europe have undergone profound structural changes with wide variations in the degree of transformation and in the rate of success in creating a competitive market and private ownership based food and agricultural system. By becoming member of the European Union the "transition" in its traditional interpretation has been concluded in ten of the Central East European countries. The transition to market based agriculture, however, is far from completion in Southern and Eastern Europe and especially in the CIS countries. International Association of Agricultural...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Agricultural Finance; Farm Management; Financial Economics; Industrial Organization; International Development; International Relations/Trade; Land Economics/Use; Production Economics.
Ano: 2008
URL: http://purl.umn.edu/92319

Methodological and neurofunctional bases for the evaluation of pain / suffering presence in animals
Provedor de dados: 195
Autores: Prada, Irvênia Luiza de Santis; Massone, Flávio; Cais, Arif; Costa, Paulo Eduardo Miranda; Seneda, Marcelo Marcondes.
Objective: To identify and consequently to avoid situations that subject animals to suffering as abioethical issue. There are two basic reasons to make it a complex subject: pain and suffering aresubjective phenomena that depend on individual experience, and animais, as well as human babies,do not give us verbal information on what they feel. Purposes: To analyze the subject from a scientificperspective, sustained by the rational method. To evaluate several situations in wmch animals areused: scientific experiments, teaching purposes, production, exhibition in circuses, parks and zoas,etc. The use ofsedem and spurs in rodeos, training and shows as cause for animal pain and sufferingis also stl.ldied. Materials &amp; Method: The similarity between the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethics; Pain/suffering; Animals; Neuroanatomy Bioética; Dolor/sufrimiento; Animales; Neuroanatomía bioética; Dor/sofrimento; Animais; Neuroanatomia.
Ano: 2002
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3278

Evaluación del hábitat del venado cola blanca (Odocoileus virginianus mexicanus) en cuatro unidades de manejo para la conservación de la vida silvestre de la Mixteca Poblana.
Provedor de dados: 32
Autores: Díaz Hernández, Hernán.
En la Mixteca Poblana el venado cola blanca es una especie que se encuentra sujeta a una fuerte presión de uso debido a su valor económico, estético y cultural. Es por esto que las poblaciones de venado requieren de zonas donde la calidad del hábitat sea favorable y les permita asegurar su subsistencia. En este estudio se evaluaron cuatro modelos de Índice de Aptitud del Hábitat (IAH)  para el venado cola blanca en la región Mixteca Poblana. Dos modelos consideraron tres variables del hábitat, con y sin factor de presión antropogénica. Los otros dos modelos consideraron  solamente las variables estadísticamente significativas en una regresión logística que relacionó las variables con datos de presencia/ausencia del venado obtenidos en 92 transectos. Los...
Palavras-chave: Indice de aptitud del hábitat; Manejo; Venado; Deer; Habitat suitability indices; Management; Estrategias para el Desarrollo Agrícola Regional; EDAR; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1891

Anatomía de las estructuras reproductivas de Stenocereus alamosensis (J.M. Coult.) A.C. Gibson y K.E. Horak (Cactaceae)
Provedor de dados: 32
Autores: Urías Castillo, Jesús.
De las 669 especies de Cactaceae reconocidas en México, se ha registrado  viviparidad en alrededor de 20 especies, en el norte de Sinaloa se han reconocido  solo algunas incluyendo Stenocereus alamosensis. Los estudios de anatomía y  morfología de las estructuras reproductivas en cactáceas son escasos y no se ha  evaluado si la viviparidad modifica algún tejido de las estructuras reproductivas. Por  ello, se consideró como objetivo de este trabajo describir y comparar las  características anatómicas y morfológicas de la flor y el fruto de dos poblaciones de  S. alamosensis que habitan en el desierto costero de Topolobampo, Ahome, Sinaloa  donde se ha registrado viviparidad. A las flores y frutos recolectados en siete  estadios de desarrollo se les aplicó...
Tipo: Tesis
Palavras-chave: Anatomía; Stenocereus alamosensis; Isla Patos; Dunas del Maviri; Maestría; Botánica; Anatomy; Patos Island; Dunes of Maviri.
Ano: 2009
URL: http://hdl.handle.net/10521/1245

Cianobacterias en un cultivo de arroz (Oryza sativa L.) en Cuautla, Morelos.
Provedor de dados: 32
Autores: Escalante Vargas, Isaura.
Las cianobacterias se presentan de manera natural en los arrozales y participan en los ciclos bioquímicos del nitrógeno y carbono. Sin embargo, estudios sobre su diversidad y función en arrozales de México son escasos. Con el objetivo de registrar la riqueza de cianobacterias durante un ciclo reproductivo del cultivo del arroz, se realizaron cuatro recolectas de suelo correspondientes a cada etapa del ciclo fenológico del arroz bajo condiciones de inundación en el ejido La Calavera, Cuautla, Morelos. Se hicieron cultivos en medio agua-suelo y medio BG11 en condiciones estándar. Las especies encontradas pertenecen a los Órdenes Chroococcales, Oscillatoriales y Nostocales, su presencia está asociada a las condiciones del manejo tradicional del cultivo....
Palavras-chave: Cianobacterias; Arroz; Fertilización nitrogenada; Rice; Nitrogenous fertilization; Edafología; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2286

Evaluación de trampas para capturar adultos de Opsiphanes cassina fabricii Boisduval (Lepidoptera: Nymphalidae) en palma aceitera en Tabasco, México
Provedor de dados: 32
Autores: Hernández Martínez, María Yolanda.
El objetivo de este trabajo fue evaluar la eficiencia de tres diseños de trampas para la captura de adultos de Opsiphanes cassina fabricii, plaga de la palma aceitera (Elaeis guineensis Jacq.), así como conocer su dinámica poblacional durante el periodo de estudio, realizar un análisis económico sobre el costo de las trampas y determinar otros insectos atrapados que no son objeto de captura. La investigación se efectuó en una plantación de 3 ha ubicada en el municipio de Cárdenas, Tabasco, México (17°59´ N y 93°38´ W). Los diseños de trampas fueron: (1) una bolsa plástica de 90x60 cm; (2) un recipiente de 5 l en forma de barril con 1 embudo y (3) una caja rectangular de 10 l con 4 embudos. Se utilizó como cebo 0.5 kg de plátano por trampa. Se empleó un...
Tipo: Tesis
Palavras-chave: Elaeis guineensis. Brassolinae.; Plaga; Maestría; Producción Agroalimentaria en el Trópico.; Pest.
Ano: 2008
URL: http://hdl.handle.net/10521/1611

La Educación especial en la escuela rural : Papalotla de Xicohténcalt, Tlaxcala.
Provedor de dados: 32
Autores: Múñoz Lobato, César Andrés.
El trabajo tiene como propósito analizar la situación socioeconómica y escolar que viven las personas con discapacidad en las zonas rurales, la investigación se realizó en el Municipio de Papalotla de Xicohténcatl, Tlaxcala. La metodología utilizada, se aborda con un enfoque  mixto (cualitativo y cuantitativo); técnicas de investigación: observación directa, talleres  participativos. Se diseñaron dos tipos de encuesta a padres de familia (67 preguntas) y profesores de educación básica (55 preguntas); aplicados a la población de discapacitados del DIF Municipal. Con los alumnos se hicieron diversas actividades académicas, dirigidas a detectar las barreras de aprendizaje a través de material pedagógico (uso de regletas, bloques lógicos, tangram, y otros),...
Palavras-chave: Desarrollo Rural; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2323

La cadena de valor de raíces y turbérculos (Malanga) en la zona norte de Nicaragua.
Provedor de dados: 32
Autores: Picado Vanegas, Armando Jesús.
Se describen los resultados obtenidos en el estudio de la cadena de valor del cultivo de la malanga en la zona norte de Nicaragua. Se ha pretendido mejorar el conocimiento sobre el papel que juega la cadena en la socio economía de la familias y actores rurales de los municipios del Tuma La Dalia, El Cua, Pantasma, Jinotega, San Ramón y Matagalpa. La información ha sido proporcionada por 105 productores y más de 20 actores distribuidos en el territorio. La pretensión central ha sido conocer la influencia de esta cadena de valor, sobre los actores en cada eslabón, desde la producción hasta la comercialización, encontrándonos que la competitividad del territorio está sujeta no solo a la existencia de empresas, organizaciones e instituciones, sino al capital...
Palavras-chave: Cadena; Eslabón; Actores; Asociatividad; Competitividad; Chain; Link; Actors; Competitiveness; EDAR; Desarrollo Rural Territorial Sustentable CP-UNAN; Maestría Tecnológica.
Ano: 2010
URL: http://hdl.handle.net/10521/360

Un sistema diseñado para la enseñanza de Sistemas de Información en Universidades y Escuelas.
Provedor de dados: 32
Autores: Cisneros Muñoz, Erika Guadalupe.
Se describe la selección, diseño y desarrollo de un paquete de SW que pudiera servir para la enseñanza tanto del uso como el desarrollo de sistemas de información, con la característica de que se puede adaptar el material al nivel académico de los alumnos. Se buscó un tema que fuera conocido por la mayoría de los alumnos y en el cual tuvieran cierto interés, puesto que estas características han demostrado contribuir al aprendizaje de los temas a comunicar. Esto resultó en el paquete CONCONDE que permite organizar concursos de conocimientos deportivos entre los miembros de alguna comunidad. Se crean torneos en los cuales se especifica el deporte al que se refiere, especialmente en cuanto a la naturaleza de las competencias: entre dos contrincantes (fútbol,...
Palavras-chave: Concursos deportivos; Software adaptable al nivel académico; Material didáctico; Sistemas de información; Sports pools; Software adaptable to academic level; Teaching material; Information systems; Cómputo Aplicado; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2395

Modelación de la relación precipitación-escurrimiento en lotes de escurrimiento en laboratorio, usando un simulador de lluvias tipo Morín e información hidrológica y espectral
Provedor de dados: 32
Autores: Marín Sosa, Isabel.
La respuesta hidrológica de un medio depende fuertemente de las características  hidráulicas de los suelos y de la condición de vegetación. A nivel de cuenca estas  condiciones presentan una alta variabilidad espacial y temporal, lo que dificulta su  modelación en forma simple. Aunque existen diferentes métodos de modelación de  la relación precipitación-escurrimiento, donde sobresale el método del Número de  Curva, están limitados debido a la poca disponibilidad de información espacial y  temporal confiable. Ante esto, los sensores remotos tienen la ventaja de adquirir  información espacialmente exhaustiva y en tiempos de visita cortos al mismo punto  de la superficie terrestre, por lo que en este trabajo se presentan los desarrollos, en  cuanto al uso de...
Tipo: Tesis
Palavras-chave: Sensores remotos; Relación precipitación-escurrimiento; Suelo desnudo; Mezcla suelo-vegetación; Maestría; Hidrociencias; Remote sensing; Precipitation-runoff relation; Bare soil; Soil-vegetation mix.
Ano: 2007
URL: http://hdl.handle.net/10521/1304

Competitividad y cadena de valor de cítricos en México: Caso Nuevo León.
Provedor de dados: 32
Autores: Magdaleno Hernández, Adalberto.
Lo cítricos de Nuevo León,  tienen calidad de exportación, pero existe una barrera sanitaria que impide su libre comercio a EUA.  El gobierno estatal esta realizando inversiones para que parte de su región citrícola sea declarada libre de mosca de la fruta, eliminando así dicha barrera comercial. Sin embargo, hay pocos estudios que indiquen: la rentabilidad, ventaja comparativa de la producción citrícola, el desarrollo de cadenas de valor y la participación del gobierno en ello. Esta investigación tuvo como objetivo analizar éstas situaciones. Para ello se utilizó la metodología de Matriz de Análisis de Política (MAP) desarrollada por Monke y Pearson, en  121 de huertas de naranja de riego (5,513 ha); considerando cinco tecnologías y un valor promedio del...
Palavras-chave: Eficiencia económica; Matriz de Análisis de Política (MAP); Ventaja comparativa; Naranja; Economic efficiency; Policy Analysis Matrix; Comparative advantage; Orange; Economía; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/766

Conciencia y desarrollo: El caso de la organización leche cremosa SSS en Nazareno Etla, Oaxaca, México.
Provedor de dados: 32
Autores: Paredes Romero, Janaina.
La conciencia supone la conformación de un sistema en el cual se basan aquellas decisiones que implican actitudes y comportamientos, incluye seis componentes: la concepción general que una persona puede tener de un objeto de estudio cualquiera, la información o datos que tenga de él, el conocimiento del objeto que crea entendimiento, todas las explicaciones o respuestas a los porqués de ese objeto, los sentimientos o vínculos emocionales entre la persona y el objeto de estudio, y la valoración de dicho objeto en términos de positivo y negativo. La naturaleza humana, por otro lado es el conjunto de características inherentes y distintivas que incluyen la manera de pensar, sentir y actuar que los humanos tendemos a tener, expresado en su capacidad creativa y...
Palavras-chave: Conciencia; Naturaleza humana; Ser humano; Ser persona; Conciencia; Creatividad; Trascendencia; Consciousness; Human nature; Human being; Personhood; Creativity; Transcendence; Maestría; Desarrollo Rural; CEDERU.
Ano: 2010
URL: http://hdl.handle.net/10521/162

Estrategias de reproducción social en grupos domésticos periurbanos. Un estudio comparativo en tres localidades poblanas
Provedor de dados: 32
Autores: Hernández Flores, José Alvaro.
La presente investigación centra su análisis de la categoría de estrategias de reproducción social para explicar el origen y el sentido de las prácticas sociales que producen cotidianamente los agentes sociales que habitan el territorio periurbano. Se parte del supuesto de que el proceso de expansión y crecimiento de las ciudades sobre las zonas agrícolas, da lugar a estrategias de reproducción social específicas, derivadas del empalme o superposición de lo urbano, con expresiones determinadas, muy concretas, de lo rural. A través del análisis de las estrategias de reproducción social desplegadas por los grupos domésticos periurbanos de tres localidades poblanas, ubicadas en el municipio de San Pedro Cholula, se examinan las diversas modalidades bajo las...
Palavras-chave: Estrategias de reproducción social; Grupos domésticos; Territorio periurbano; Modo de vida rural; Social reproduction strategys; Households; Periurban area; Rural lifestyle; Doctorado; EDAR; Estrategías para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/135

Conciencia y desarrollo: El caso de la organización leche cremosa SSS en Nazareno Etla, Oaxaca, México.
Provedor de dados: 32
Autores: Paredes Romero, Janaina.
La conciencia supone la conformación de un sistema en el cual se basan aquellas decisiones que implican actitudes y comportamientos, incluye seis componentes: la concepción general que una persona puede tener de un objeto de estudio cualquiera, la información o datos que tenga de él, el conocimiento del objeto que crea entendimiento, todas las explicaciones o respuestas a los porqués de ese objeto, los sentimientos o vínculos emocionales entre la persona y el objeto de estudio, y la valoración de dicho objeto en términos de positivo y negativo. La naturaleza humana, por otro lado es el conjunto de características inherentes y distintivas que incluyen la manera de pensar, sentir y actuar que los humanos tendemos a tener, expresado en su capacidad creativa y...
Palavras-chave: Conciencia; Naturaleza humana; Ser humano; Ser persona; Conciencia; Creatividad; Trascendencia; Consciousness; Human nature; Human being; Personhood; Creativity; Transcendence; Maestría; Desarrollo Rural; CEDERU.
Ano: 2010
URL: http://hdl.handle.net/10521/162

Estrategias de reproducción social en grupos domésticos periurbanos. Un estudio comparativo en tres localidades poblanas
Provedor de dados: 32
Autores: Hernández Flores, José Alvaro.
La presente investigación centra su análisis de la categoría de estrategias de reproducción social para explicar el origen y el sentido de las prácticas sociales que producen cotidianamente los agentes sociales que habitan el territorio periurbano. Se parte del supuesto de que el proceso de expansión y crecimiento de las ciudades sobre las zonas agrícolas, da lugar a estrategias de reproducción social específicas, derivadas del empalme o superposición de lo urbano, con expresiones determinadas, muy concretas, de lo rural. A través del análisis de las estrategias de reproducción social desplegadas por los grupos domésticos periurbanos de tres localidades poblanas, ubicadas en el municipio de San Pedro Cholula, se examinan las diversas modalidades bajo las...
Palavras-chave: Estrategias de reproducción social; Grupos domésticos; Territorio periurbano; Modo de vida rural; Social reproduction strategys; Households; Periurban area; Rural lifestyle; Doctorado; EDAR; Estrategías para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/135

A Multicriteria Risk Analysis to Evaluate Impacts of Forest Management Alternatives on Forest Health in Europe
Provedor de dados: 7
Autores: Duncker, Philipp; Albert-Ludwigs-University Freiburg, Institute for Forest Growth;; Gardiner, Barry; Forest Research, Northern Research Station;; Grodzki, Wojciech; Forest Research Institute, Department of Forest Management in Mountain Regions;; Langstrom, Bo; The Swedish University of Agricultural Sciences, Department of Ecology;; Netherer, Sigrid; University of Natural Resources and Life Sciences, Department of Forest and Soil Sciences, Institute of Forest Entomology, Forest Pathology, and Forest Protection;; Nicoll, Bruce; Forest Research, Northern Research Station;; Orazio, Christophe; IEFC - EFI Atlantic;; Schelhaas, Mart-Jan; Centre for Ecosystem Studies, Alterra;; Tojic, Karl; Albert-Ludwigs-University Freiburg, Institute for Forest Growth;.
Due to climate change, forests are likely to face new hazards, which may require adaptation of our existing silvicultural practices. However, it is difficult to imagine a forest management approach that can simultaneously minimize all risks of damage. Multicriteria decision analysis (MCDA) has been developed to help decision makers choose between actions that require reaching a compromise among criteria of different weights. We adapted this method and produced a multicriteria risk analysis (MCRA) to compare the risk of damage associated with various forest management systems with a range of management intensity.  The objective was to evaluate the effect of four forest management alternatives (FMAs) (i.e., close to nature, extensive management with combined...
Tipo: Peer-Reviewed Reports
Palavras-chave: Abiotic; Biotic; Damage; Hazard; MCRA; Silviculture.
Ano: 2012

Exploring Futures of Ecosystem Services in Cultural Landscapes through Participatory Scenario Development in the Swabian Alb, Germany
Provedor de dados: 7
Autores: Plieninger, Tobias; Ecosystem Services Research Group, Berlin-Brandenburg Academy of Sciences and Humanities; Department of Geosciences and Natural Resource Management, University of Copenhagen; tobias.plieninger@life.ku.dk; Bieling, Claudia; Chair for Landscape Management, University of Freiburg; claudia.bieling@landespflege.uni-freiburg.de; Ohnesorge, Bettina; Ecosystem Services Research Group, Berlin-Brandenburg Academy of Sciences and Humanities; ohnesorge@bbaw.de; Schaich, Harald; Chair for Landscape Management, University of Freiburg; harald.schaich@landespflege.uni-freiburg.de; Schleyer, Christian; Ecosystem Services Research Group, Berlin-Brandenburg Academy of Sciences and Humanities; Department of Environmental Politics, Helmholtz Centre for Environmental Research - UFZ; christian.schleyer@ufz.de.
Cultural landscapes are appreciated for the plethora of ecosystem services that they provide to society. They are, however, subject to rapid and fundamental transformations across Europe, mainly as a result of intensification or abandonment of land uses. Our objective is to assess the possible future drivers of cultural landscape changes and their likely impacts on ecosystem services provision as perceived by local actors. We present stakeholder-based scenarios for the Swabian Alb, a biosphere reserve in southern Germany, projected to the yr 2040. On their basis, we explore the possibilities and limitations of local civil engagement for landscape conservation and development in the face of increasing global influences. The steps of the process are (a)...
Tipo: Peer-Reviewed Reports
Palavras-chave: Ecosystem services: landscape development; Participatory scenario planning; Germany; Multifunctional landscapes; Regional development; Quality of life; Rural areas.
Ano: 2013

Payments for Environmental Services: A conceptual, regulatory approach and the limits of its expansion in Brazil
Provedor de dados: 194
Autores: Oliveira, Mariana Martins de; Nogueira, Carolina de Mattos.
Payments for Environmental Services (PSA) are part of a global context as an efficient environmental management strategy not only in environmental issues, but also in economic and social aspects, as through financial and technical incentives, conservation actions are stimulated. However, for PSA to be effective, it is imperative to consider some criteria, such as the insertion of these payments into the market economy from economic valuation techniques and their regulation in Brazilian legislation. Therefore, the objective of the study, focusing on water resources management, is to analyze the concepts, laws and applications of PES programs, as well as to understand the difficulties that limit their expansion in Brazil. To this end, a bibliographic search...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Serviços Ambientais; Recursos Hídricos; Produtor Rural.
Ano: 2022
URL: http://periodicos.ufsm.br/extensaorural/article/view/54579

Seleção de genótipos de soja ricos em pelos radiculares - ano de 2015.
Provedor de dados: 14
Autores: GONCALVES, S. L.; MOREIRA, J. U. V.; PIPOLO, A. E.; ARIAS, C. A. A.; SANTOS, E. D. dos; NASCIMENTO, W. B. da S.
RESUMO: O reconhecimento da importância dos pelos radiculares para a sobrevivência e a nutrição das plantas é crescente, sendo que genótipos ricos em pelos radiculares possuem maior capacidade de adaptação a ambientes sujeitos a restrições. Neste trabalho foi feita uma seleção de genótipos de soja, baseada na densidade visual de pelos da raiz principal e das laterais e na medição do comprimento médio dos pelos radiculares, de linhagens e cultivares. Foram avaliados 34 genótipos, no ano de 2015, no laboratório de tecnologia de sementes da Embrapa Soja. A semeadura foi realizada em papel de germinação, umedecidos em solução nutritiva de sulfato de cálcio. Imagens de raízes foram obtidas de plântulas com seis a sete dias de idade. Os dados foram tabelados e...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Soja; Pelo radicular; Raiz; Genótipo; Soybeans; Root hairs; Genotype; Roots.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1052641

Integração lavoura-pecuária-floresta. 2. Identificação e implantação de forrageiras na integração lavoura-pecuária.
Provedor de dados: 14
Autores: MACHADO, L. A. Z.; CECCON, G.; ADEGAS, F. S.
RESUMO: Nos sistemas de integração Lavoura-Pecuária (iLP) existem arranjos e métodos de formação de pastagens que permitem aumentar a produção animal e alterar o ambiente, tornando-o mais favorável à produção de grãos. O cultivo de forrageiras solteiras ou em consórcio com culturas tem crescido, mas este assunto é novo para muitos técnicos e agricultores que têm dificuldade na identificação das espécies e cultivares de forrageiras. Com isso, eles têm dificuldade em implantar as pastagens e estabelecer seu manejo. Existem algumas características morfológicas, relacionadas à folha, à presença de cera e pelos e ao tipo de inflorescência, que permitem a identificação das cultivares de forrageira no campo, com facilidade. Entre as forrageiras disponíveis no...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Sistema de produção; Integrated agricultural systems.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/925968

Etude intégrée du secteur Loire Vilaine : synthèse des connaissances, analyse des problématiques
Provedor de dados: 5
Autores: Baudrier, Jérôme.
The coastal area located between Quiberon and Noirmoutier is influenced by dilution plumes of the Loire and Vilaine rivers. Dysfunctions linked with a growing eutrophication of the environment have been observed over the last decades. Important imbalances such as massive deaths of the fauna in open embayments and more and more appearances of red tides give the area a unique character. Other environ mental problems are likely to disrupt human activites in the near future (bays silting up, quality of coastal water worsening, overfishing ...). This is why there is a real need to gather information on the subject. This will make it possible to identify problems and gaps in the area. Beside presenting pieces of information, the study offers various reflection...
Tipo: Text
Palavras-chave: Loire; Vilaine; Panaches de dilution; Eutrophisation; Déséquilibres; Écosystème.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00016/12702/9624.pdf

Contribution à l'étude du couplage entre diffusion d'eau et contrainte mécaniques dans les matériaux marins hautes performances
Provedor de dados: 5
Autores: Humeau, Corentin.
The aim of the study was to understand the impact of coupling on water diffusion and mechanical stress on marine installations. Moreover, we identified the key phenomena involved during this type of exposure. When we look to these type of applications we can distinguish two type of materials used: one for the structure and another for mooring facilities. The best performing structural materials appear to be composites, while the most effective mooring devices are made with synthetic ropes. Therefore, we decided to investigate both materials with the same method: first the properties uncoupled, second, as semi-coupled behaviours and finally as one coupled phenomenon. The present work highlights the divergences between uncoupled, semi-coupled and coupled...
Tipo: Text
Palavras-chave: Couplage; Diffusion d’eau; Contrainte mécanique; Vieillissement; Polymères; Cordages synthétiques; Composites; Coupling; Water diffusion; Mechanical stress; Ageing; Polymers; Synthetic ropes; Composites.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00499/61023/64424.pdf

Estimations satellitales de la couleur de l'eau lagonaire à l'aide des produits Sentinel-2
Provedor de dados: 5
Autores: Rintz, Cam Ly.
The lagoon of New Caledonia is subject to various pressures, including terrigenous stream inputs. Their evolution – extent, intensity – can be studied through parameters such as ocean color, depending on turbidity or phytoplankton concentration. Satellite imagery is more and more used for this purpose. As the Sentinel-2 (S2) mission, with its satellites providing ten meters-resolution images, has been recently launched, we worked on the characterisation of lagoon color using these products. After testing the performance of existing algorithms for New Caledonia, initially applied to satellites other than S2, we tried to establish a new turbidity algorithm based on field data (measures in the South-West lagoon of New Caledonia and the lagoon near Koumac in...
Tipo: Text
Palavras-chave: Couleur de l’eau; Turbidité; Satellite; Télédétection; Réflectance; Lagon; Nouvelle-Calédonie; Sentinel-2.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00645/75752/76712.pdf

Marine protected areas and artificial reefs: A review of the interactions between management and scientific studies
Provedor de dados: 5
Autores: Claudet, Joachim; Pelletier, Dominique.
Inshore marine areas host key habitats for the biological cycle of many marine populations, but are subject to strong anthropogenic pressure. Uses of inshore areas are multiple and often give rise to conflicting interests. In this context. marine protected areas (MPAs) and artificial reefs (ARs) are increasingly regarded as interesting management measures, in that they contribute to ecosystem conservation, fisheries sustainability, and because they can be helpful in zoning coastal areas in order to reduce conflicts between users. Beyond these expected benefits, it is important to appraise whether MPAs and ARs meet managers' objectives. This review focuses on the interaction between ecological sciences and management in the purpose of establishing or...
Tipo: Text
Palavras-chave: Monitoring; Management actions objectives; Management; Impact assessment; Fish; Artificial reefs; Marine protected areas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-397.pdf

Essais d'utilisation des cryoprotecteurs : application au hachis de poisson
Provedor de dados: 5
Autores: Necibi, Mohamed Mongi.
This study was carried out in order to find a better use for by - products or products which are at this time under used - filleting residues - by catch fish - non commercialized species. The technology permetting the recuperation of the edible flesh from these products is available and is in fact already in use industriallyo A preliminary investigation had been done at the ISTPM on this subject. Fish mince is the product obtained with the deboning machine, which separates the flesh from skin and bones by forcing it through a perforated metallic drum. This mince can be put in good use, particularly in production of fish "charcuterie", fish soup or aroma. Research in this field is active in several contries, notably in Japan where enormous arnount of mince...
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00135/24662/22705.pdf

Stratégie d'exploitation des zones de pêche d'un chalutier hauturier du Guilvinec
Provedor de dados: 5
Autores: Pichon, Jacques.
The Bigouden region's fishing is significant by the tonnage landed, the quality of the production and high sales price. That makes Guilvinec "an ideal laboratory for analysing the fish business in all its complexity, from the catch to marketing". The fishermen of the Guilvinec district are spread out in 3 ports: Guilvinec, Loctudy, and Saint Guénolé. Each port has its speciality (example: Guilvinec's speciality is monkfish). Each fleet is composed of dinghies, coastal trawls, seafaring fish trawls, and seafaring crayfish trawls. The subject chosen for this master's theses is the study of the fishing strategy of a seafaring ship, the Kerflous. This work was difficult because it reached into the sphere of the professional secret. The Kerflous works at the...
Tipo: Text
Palavras-chave: Celtic sea; Trawler; Fishing strategy; Fishing zones; Product quality; Bigouden; Guilvinec; Brittany; Chalutier; Mer Celtique; Stratégie de pêche; Zones de pêche; Qualité; Guilvinec; Bigouden.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/these-2560.pdf

The Impossible Sustainability of the Bay of Brest? Fifty Years of Ecosystem Changes, Interdisciplinary Knowledge Construction and Key Questions at the Science-Policy-Community Interface
Provedor de dados: 5
Autores: Ragueneau, Olivier; Raimonet, Melanie; Maze, Camille; Coston-guarini, Jennifer; Chauvaud, Laurent; Danto, Anatole; Grall, Jacques; Jean, Frederic; Paulet, Yves-marie; Thouzeau, Gerard.
In this contribution, the study of the Bay of Brest ecosystem changes over the past 50 years is used to explore the construction of interdisciplinary knowledge and raise key questions that now need to be tackled at the science-policy-communities interface. The Bay of Brest is subject to a combination of several aspects of global change, including excessive nutrient inputs from watersheds and the proliferation of invasive species. These perturbations strongly interact, affecting positively or negatively the ecosystem functioning, with important impacts on human activities. We first relate a cascade of events over these five decades, linking farming activities, nitrogen, and silicon biogeochemical cycles, hydrodynamics of the Bay, the proliferation of an...
Tipo: Text
Palavras-chave: Sustainability; Land-ocean continuum; Bay of Brest; Interdisciplinarity; Science-policy-community interface.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72792/72272.pdf

Short-scale temporal variability of physical, biological and biogeochemical processes in the NW Mediterranean Sea: an introduction
Provedor de dados: 5
Autores: Andersen, V.; Goutx, M.; Prieur, L.; Dolan, J. R.
In the framework of the PROOF-PECHE project (http://www.obs-vlfr.fr/proof/vt/op/ec/peche/pec.htm) a multi-disciplinary team performed experiments and collected samples during the DYNAPROC2 cruise aboard the RV Thalassa from September to October in 2004. The cruise provided data on the functioning of the pelagic food web by sampling over a month long period in the NW Mediterranean Sea at a fixed station subject to weak horizontal advection currents during a period of hydrological stability. This paper describes the background of the cruise and provides an overview of the results derived from the campaign which constitute the special section. The major objective of the cruise was to assess the relative importance and variability of the pathways of carbon in...
Tipo: Text
Palavras-chave: Spring bloom; Zooplankton community; Vertical distribution; Surface layer; Wind events; Bacterial communities; Food web; Transition; Oligotrophy; Abundance.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00092/20315/17954.pdf

Combined effects of temperature-salinity on larval survival of the Eastern oyster Crassostrea virginica in the Maryland portion of the Chesapeak Bay (USA)
Provedor de dados: 5
Autores: Goulletquer, Philippe; Heral, Maurice; Prou, Jean.
Oyster landings in the Maryland portion of the Chesapeake Bay have declined by more than 50fold since the early part of the century, despite intensive management efforts. The annual shell repletion program is the most critical programmatic element to effect recovery of the ailing Eastern oyster Crassotrea virginica stock and fishery. The overall efficacy of shell repletion management depends primarily on the success of spat settlement on the planted shell, and furthermore on their survival rate. The Operations Research techniques and mathematical programming developed by Rothschild et al. (1991) attempt to maximize spat recruitment to the oyster stock subject to a series of operational constraints. Allocation and timing of shell deployment are the most...
Tipo: Text
Palavras-chave: Larval; Settlement; USA; Chesapeake Bay; Crassotrea virginica; Oysters.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-3074.pdf

Report of the Workshop to consider FMSY ranges for stocks in ICES categories 1 and 2 in Western Waters (WKMSYREF4). 13–16 October 2015 Brest, France
Provedor de dados: 5
Autores: ICES.
The report is based on work conducted in a workshop that was held in Brest, France on 13–16 October 2015, and describes the preparatory work in response to the EC longterm management plans for western EU waters (ICES Subareas V to X). Specifically Art. 10 of Regulation (EU) No 1380/2013 on the Common Fisheries Policy, which requires a multiannual plan including quantifiable target. In this context ICES was requested to provide plausible values around FMSY for some stocks inhabiting western EU waters. Estimates of reference points Blim, Bpa, Flim and Fpa are provided for the stocks considered, and the FMSY ranges [Flower, Fupper] are estimated by ICES to be precautionary, and deliver no more than 5% reduction in long-term yield compared with MSY. The report...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00308/41964/41233.pdf

Selectivite des chaluts en polyamide dans la peche de la langoustine
Provedor de dados: 5
Autores: Rene, Abbes; Warluzel, Noël.
Net selectivity in fishing the Norway lobster, Nophrops noruegicus (L., 1758), has only until now been the subject of a limited number of publications. Among the authors who have approached the problem, POPE and THOMAS (1965), COLE and SIMPSON (1965), FIGUEIREDO and THOMAS (1967) emphasized the great variability of the results. The research work that we present here does not claim to be exhaustive. It is appropriate, in fact, to emphasize that our data come from a selectivity campaign mainly devoted to hake (DARDIGNAC, HÉDÉ-HAUY and PORTIER, 1968). The trawls that were used on board the Thalassa are very different, as much by their design and their dimensions as by their meshing, from those used on board the small fishing ships that hunt Dublin bay prawn...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3143.pdf

Disponibilité des données et des enseignements des pêcheries palangrières thonières primordiales en atlantique (japon, corée, formose)
Provedor de dados: 5
Autores: Le Gal, Jean-yves.
The advertising effort developed by the Japanese National Fisheries Agency (Research department) for the spreading of statistical data on tuna longline catches and effort is, at first, a surprising subject in the eye of professionals and scientists. Two reasons can be cited as an explanation: On the one hand, the maximum precision of the data (date, location, amount of catches) and, on the other hand, the short period of time between the fishery and the publication of the obtained results in the form of a very precise annual report. This publication without distrust is currently the demonstration of what scientists have been pleading to professionals for half a century: the success of a nation, of a state, of a fleet in the exploitation of the ocean's...
Tipo: Text
Palavras-chave: Histoire Ifremer.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-5069.pdf

Comportement de Crassostrea Angulata lamarck sous des conditions d'asphyxie
Provedor de dados: 5
Autores: His, Edouard.
The oyster's ability to survive in the absence of oxygen is well known. The only means of defence that these sedentary organisms have for fighting against unfavourable environmental conditions or predators is occlusion of the valves. This implies anaerobiosis potential.  This way of life occurs frequently: in the oyster beds, following the most violent storms, the oysters are piled up or covered with sand; they survive in this situation for several days until the oyster farmers put them back to take advantage of the spring tides that enable the drying out of the breeding areas; during periods when the runoff basins are overloaded, the dissolved oxygen content of the sea water are very low and significant mortality rates are sometimes observed in the...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3137.pdf

Les Systèmes de licences de pêche : le cas de la Méditerranée française
Provedor de dados: 5
Autores: Meuriot, Eric; Dremiere, Pierre-yves.
The subject of this study is to examine the operation and implications of the system of licenses for bottom trawling implemented in the French Mediterranean, this compared with the context of fishing in this area during the last twenty years. The study begins with a review and assessment of the evaluation criteria proposed in the economic literature. This review of the literature is done to find an approach for analysing licensing systems. The study then recounts the main stages of the implementation of the licensing system for trawling in the Mediterranean as well as the context of fishing. After a description of the licensing system and a reminder of the objectives and arguments defended by the various participating groups, the study examines its...
Tipo: Text
Palavras-chave: SEM.
Ano: 1986
URL: https://archimer.ifremer.fr/doc/1986/rapport-2494.pdf

Five critical questions of scale for the coastal zone
Provedor de dados: 5
Autores: Swaney, D. P.; Humborg, C.; Emeis, K.; Kannen, A.; Silvert, W.; Tett, P.; Pastres, R.; Solidoro, C.; Yamamuro, M.; Henocque, Yves; Nicholls, R.
Social and ecological systems around the world are becoming increasingly globalized. From the standpoint of understanding coastal ecosystem behavior, system boundaries are not sufficient to define causes of change. A flutter in the stock market in Tokyo or Hong Kong can affect salmon producers in Norway or farmers in Togo. The globalization of opportunistic species and the disempowerment of people trying to manage their own affairs on a local scale seem to coincide with the globalization of trade. Human-accelerated environmental change, including climate change, can exacerbate this sense of disenfranchisement. The structure and functioning of coastal ecosystems have been developed over thousands of years subject to environmental forces and constraints...
Tipo: Text
Palavras-chave: Scale; Coastal management; Governance; Fishery management; Regime shift; Biogeochemistry.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00073/18437/16086.pdf

The relative weight of traditions, economics, and catch plans in New Zealand fleet dynamics
Provedor de dados: 5
Autores: Marchal, Paul; Lallemand, Philippe; Stokes, Kevin.
We investigate the relative weights of catch plans expected profit, and traditions in fishers' decision-making For five New Zealand fleets subject to an individual transferable quota (ITQ) management regime. Metiers were defined for these fleets as a combination of bears. management units, and a targeting index (either target species or statistical area) A nested logit random utility model was Used to model the metier allocation of fishing, effort in relation to catch plans, expected profit, and Past fishing allocations. This study showed that traditions and catch plans appeared to be important determinants of fishers' behavior for these New Zealand fleets. The model developed in thiS study filled the data generally well and was also able to predict, in...
Tipo: Text
Palavras-chave: Random Utility Model; New Zealand fisheries; Fleet dynamics; Catch plans; Individual Transferable Quotas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6418.pdf

Pyramid wavefront sensor optical gains compensation using a convolutional model
Provedor de dados: 5
Autores: Chambouleyron, V; Fauvarque, Olivier; Janin-potiron, P.; Correia, C.; Sauvage, J-f; Schwartz, N.; Neichel, B.; Fusco, T.
Context. Extremely large telescopes are overwhelmingly equipped with pyramid wavefront sensors (PyWFS) over the more widely used Shack-Hartmann wavefront sensor to perform their single-conjugate adaptive optics (SCAO) mode. The PyWFS, a sensor based on Fourier filtering, has proven to be highly successful in many astronomy applications. However, this sensor exhibits non-linear behaviours that lead to a reduction of the sensitivity of the instrument when working with non-zero residual wavefronts. This so-called optical gains (OG) effect, degrades the closed-loop performance of SCAO systems and prevents accurate correction of non-common path aberrations (NCPA).Aims. In this paper, we aim to compute the OG using a fast and agile strategy to control PyWFS...
Tipo: Text
Palavras-chave: Instrumentation: adaptive optics; Atmospheric effects.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00666/77856/80014.pdf

INDI 67. Developments of Indicators to improve monitoring of MSFD descriptors 6 and 7 (INDI67) : final report
Provedor de dados: 5
Autores: Fettweis, M; Toorman, E; Verney, Romaric; Chapalain, Marion; Legrand, S; Lurton, Xavier; Montereale-gavazzi, G; Roche, M; Shen, X; Van Den Eynde, Dries; Van Lancker, Vera.
Context To protect the marine environment more effectively, the European Union adopted the Marine Strategy Framework Directive (MSFD) in 2008, aiming to achieve the Good Environmental Status (GES) of the EU's marine waters by 2020 and to protect the resource base upon which marine-related economic and social activities depend. A major challenge in the implementation of the MSFD is to achieve the necessary scientific knowledge on the marine environment, its processes and the methods to monitor them. The focus of INDI67 is on the evaluation and development of indicators to monitor GES of descriptor 6 and 7. Seafloor integrity (descriptor 6) refers to the structure and functions of the benthic ecosystems. It relates to the comprises physical, chemical and...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00634/74632/74526.pdf

Response of the northwestern Pacific upper water delta C-13 to the last deglacial ventilation of the deep Southern Ocean
Provedor de dados: 5
Autores: Chen, Shaungxi; Li, Tiegang; Tang, Zheng; Qiu, Xiaohua; Xiong, Zhifang; Nan, Qingyun; Xu, Zhaokai; Chang, Fengming.
The deglacial delta C-13 minimum events that originated from the ventilation of the deep Southern Ocean around Antarctica, have been recorded in a range of marine sediments from the southern to tropical oceans in late Pleistocene. However, the broad delta C-13 minimum event was also reported as far as to the northern middle latitudes, in northwestern Pacific marginal sea areas, during the last deglaciation. In the northwestern Pacific, forcing from the northern high latitudes is strongly expressed, while the records of influence from the southern high latitudes are few. The Kuroshio Source Region (KSR) forms a boundary between the northwestern Pacific and the southern, tropical Pacific. So, high-resolution planktonic foraminiferal records in core MD06-3054...
Tipo: Text
Palavras-chave: Planktonic foraminiferal delta C-13; Ventilation of the deep Southern Ocean; Northwestern Pacific; Last deglaciation; Delta C-13 minimum event.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00213/32467/30934.pdf

Relationships between genetic diversity and niche-partitioning of Synechococcus populations in Mediterranean coastal lagoons, systems of transition between freshwater and marine ecosystems
Provedor de dados: 5
Autores: Masseret, Estelle; Bierne, Nicolas; Chevret, Pascale; Roumagnac, Marie; Bec, Béatrice; Laugier, Thierry; Collos, Yves; Vaquer, Andre.
Coastal lagoons are morphologically and ecologically complex ecosystems, subject to constantly changing environmental conditions generally of much greater magnitude than it is recorded in the open sea. Due to their transitional nature, they usually display a number of specific features (ie. high nutrient concentrations, light spectral quality, salinity range) which are potentially influencing strategies of adaptation of photosynthetic microorganisms. The unicellular cyanobacteria Synechococcus is a major component of marine and freshwater picophytoplankton. Its genetic diversity is well documented for these ecosystems, but knowledge about biodiversity and distribution of this genus in transitional waters remains scarce. The phylogenetic analysis of a...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00011/12198/8960.pdf

Êvaluation des variables d’entrée les plus influentes sur des grandeurs d’intérêt dans une simulation d’incendie
Provedor de dados: 5
Autores: Allard, Alexandre; Fischer, Nicolas; Didieux, Franck; Guillaume, Eric; Iooss, Bertrand.
This paper is concerned with a fire simulation model which aims at evaluating the effects from a fire source in a building on people evacuation. Three parameters are investigated to assess the safety of the building : the maximal upper layer temperature, the maximal lower layer temperature and the minimal layer height. The combination of these three parameters is supposed to let the evacuation paths practicable in case of a fire. The parameters are computed through a computational code in a measurement context. Consequently their knowledge is supposed to be based on a measurement uncertainty evaluation and this paper aims at evaluating the contribution of a set of input parameters to the variance of these three parameters. In measurement science, the use...
Tipo: Text
Palavras-chave: Incertitude de mesure; Ingénierie du feu; Analyse de sensibilité; Indices de sobol’; Polynômes locaux AMS 2000 subject classifications: 60K35; Measurement uncertainty; Fire engineering; Sensitivity analysis; Sobol’ indices; Local polynomial smoother.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00693/80496/83684.pdf

Développements numériques pour la modélisation du comportement et du sillage d'hydroliennes
Provedor de dados: 5
Autores: Mycek, Paul; Pinon, Gregory; Germain, Gregory; Rivoalen, Elie; Gaurier, Benoit.
Developments of new marine current turbines farm are subject to a better understanding of interactions effects between the turbines. Experimental trials have been realised in the wave and current flume of IFREMER Boulogne-sur-Mer, on a three bladed horizontal axis marine current turbine in order to characterise the elementary interaction between two turbines aligned with the current. At the same time, a three-dimensional numerical software has been developed in order to model the flow behind a marine current turbine. The software is based on a Lagrangian Vortex Method. It enables to evaluate the forces and moments onto the rotor as well as the flow fields around the turbine. Most of the previous numerical studies regarding interaction between devices only...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00141/25200/23360.pdf

Les scorpaenidae de l'Atlantique et de la méditerranée. première note. le genre scorpaena
Provedor de dados: 5
Autores: Cadenat, Jean.
The Atlantic and Mediterranean members of the scorpaenidae family have always triggered numerous discussions about their reciprocious congenialities. Back in the (recent) days when the number of species known on the French coasts was still fairly low, the belonging of one species to such or such genus, as Helicolenus (Sebastes) dactylopterus DELAROCHE or Scorpaena maderensis Cuvier and Valenciennes, has been the subject of numerous articles of which the authors' conclusions might differ from one another, and even today light is still far from being shed on those topics. The difficulties met in the determination of scorpaenidae: similar general appearance, subtle differences, impossibility of comparing the samples with the types, incomplete or...
Tipo: Text
Ano: 1943
URL: http://archimer.ifremer.fr/doc/1943/publication-3420.pdf

Marine growth effect on the hydrodynamical behavior of a submarine cable under current and wave conditions.
Provedor de dados: 5
Autores: Marty, Antoine; Berhault, Christian; Damblans, Guillaume; Facq, Jean-valery; Gaurier, Benoit; Germain, Gregory; Soulard, Thomas; Schoefs, Franck.
This document describes the experimental set-up of OMDYN2 and LEHERO-MG projects. The study aims to quantify the impact of biofouling on the dynamic behaviour of an underwater power cable by analysing the hydrodynamic coefficients, such as drag and added mass coefficients. Experiments have been carried out in the wave and current basin of IFREMER, located at Boulogne-sur-mer, in order to compare the dynamics of several cylinders with or without roughness. Three cylinders are tested, two cylinders with different roughnesses and one smooth cylinder. The studied roughnesses concern realistic marine growth and have therefore significantly bigger dimensions (like mussels) than roughness studied in the research literature on the subject. Tests are conducted...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00660/77245/78697.pdf

Le microplancton de la rivière d'Auray
Provedor de dados: 5
Autores: Paulmier, Gérard.
The sample data of the microplankton collected in the Auray River between 1961 and 1963 enabled us to establish the permanent or seasonal character of numerous organisms, many of which are unevenly distributed between downstream and upstream.Tides and currents, temperature and salinity are some of the factors that are responsible for the distribution of micro-organisms. This is the reason why fresh water or brackish water types are mostly found in the upper part of the river-which is subject to rises in water level-whereas oceanic types are more numerous next to the mouth of the river.An extended drop of the temperature favours the development of cold water elective types. The composition of microplankton, its relative abundance and its distribution in the...
Tipo: Text
Ano: 1965
URL: http://archimer.ifremer.fr/doc/1965/publication-3995.pdf

Site n°5. The Pertuis Breton (Bay of Biscay) France
Provedor de dados: 5
Autores: Bodoy, Alain; Martin, Jean-louis; Bacher, Cedric; Haubois, Anne-gaelle; Sauriau, Pierre-guy.
1.This report presents the results of a field study conducted in the ECASA test site nOS in the Pertuis Breton, France. The site is located on the Atlantic West coasts. It is open to the bay of Biscay, but is slightly protected against westerly winds. The bay has been exploited by intertidal mussels culture for centuries. 2. Within the bay, mussels (Mytilus edulis) are cultivated either by the traditional pole technique, around the bay or on longlines in the centre of the bay. The area occupied by these longline s represents 250 ha, and the resulting annual production is 1 000 tonnes of mussels. The average depth at mid tide is of 13.8 m. The sediment is sandy, with a small fraction of mud. 3. The site is subject to several regular monitoring through the...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00304/41516/40724.pdf

Review and perspectives of physiological mechanisms underlying genetically-based resistance of the Pacific oyster Crassostrea gigas to summer mortality
Provedor de dados: 5
Autores: Samain, Jean-francois.
French oyster farming has been subject to severe mortalities during the summer months. Results from the research program "Morest", which ran from 2000 to 2006 and examined the possible causes of these mortalities, led to the construction of a model to explain the interaction between environmental factors, oyster physiology and different opportunistic pathogens underlying oyster summer mortality. Temperature, food, reproduction and stress were the main factors required for oyster mortality. Genetically-based resistance ("R" oysters) or susceptibility ("S" oysters) to summer mortality was revealed by divergent selection. Building on these results, a literature search was made in 2007 on the molecular origin of genetic resistance to such a complex mortality...
Tipo: Text
Palavras-chave: Immunity; Antibacterial activity; Host defence; Environmental stress; Crassostrea gigas.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16229/13752.pdf

Ontogeny and physiology of the digestive system of marine fish larvae
Provedor de dados: 5
Autores: Zambonino, Jose-luis; Gisbert, E; Sarasquete, C; Navarro, I; Gutiérrez, J; Cahu, Chantal.
The ontogeny of the digestive tract of marine fish larvae has been the subject of many studies these last twenty years. Beyond the scientific interest for such animal species, particularly for developmental aspects, most of these studies aimed to come up with the expectations of commercial hatcheries by reducing the bottlenecks in larvae culture and weaning processes (switch from live preys to compound diet feeding sequence). Consequently, the profile and dietary adaptation of digestive enzymes, the description and histology of the main organs have been extensively studied, when others aspects of the physiology of the larvae digestive tract (gut hormones, intestinal transport…) were poorly investigated and this imbalanced knowledge is showed through this...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00086/19684/17307.pdf

Determining how the pelagic ecosystem over the continental shelf of the Bay of Biscay (NE Atlantic) functions: An approach using mesozooplankton enzyme activities as descriptors
Provedor de dados: 5
Autores: Bergeron, Jean-pierre; Delmas, Daniel; Koueta, Noussithe.
A fisheries research cruise conducted in 2000 offered a first opportunity to take simultaneous measurements of the activities of three enzymes in mesozooplankton samples collected at a regional scale over the continental shelf of the Bay of Biscay in the NE Atlantic, with the aim of characterizing main aspects of the functioning of the biotic environment of small pelagic fish populations. The activity of the digestive endopeptidase trypsin was selected to characterize the assimilation rate of proteins, whereas pyruvate kinase (PK) was chosen as an indicator of carbohydrate assimilation and aspartate transcarbamylase (ATC) provided an overall assessment of mesozooplankton productivity. The Bay of Biscay region is subject to various strong physical driving...
Tipo: Text
Palavras-chave: Trypsin; Pyruvate kinase; Metabolic descriptors; Mesozooplankton; Bay of Biscay; Aspartate transcarbamylase.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6359.pdf

Contribution a l'étude du lieu jaune (Gadus Pollachius L.)
Provedor de dados: 5
Autores: Moreau, Jean.
Gadus pollachius Linnaeus (Fig. 1) is generally known under the name of "lieu jaune" in France, but according to the region or its size, it can have other names: At Boulogne-sur-Mer, it is known as white "merluche" or "colin" and in Brittany, as "malouan" or "loeneck" according to whether it is a juvenile or an adult specimen.In England, it is called pollack or whiting pollack and in Scotland, "laits" or "lythe". In Spain, juveniles are called "corobelo" and adults "abadejo".While the development of eggs and larvae of whiting is well described, its biometry and its growth are less well known.The present study aims to contribute some data on this subject and to determine whether the whiting fished in the southern portion of their habitat, from Portugal to...
Tipo: Text
Ano: 1964
URL: http://archimer.ifremer.fr/doc/1964/publication-4041.pdf

Characterization and sources of colored dissolved organic matter in a coral reef ecosystem subject to ultramafic erosion pressure (New Caledonia, Southwest Pacific)
Provedor de dados: 5
Autores: Martias, Chloe; Tedetti, Marc; Lantoine, Francois; Jamet, Leocadie; Dupouy, Cecile.
The eastern lagoon of New Caledonia (NC, Southwest Pacific), listed as a UNESCO World Heritage site, hosts the world's second longest double-barrier coral reef. This lagoon receives river inputs, oceanic water arrivals, and erosion pressure from ultramafic rocks, enriched in nickel (Ni) and cobalt (Co). The aim of this study was to characterize colored dissolved organic matter (CDOM), as well as to determine its main sources and its possible relationships (through the use of Pearson correlation coefficients, r) with biogeochemical parameters, plankton communities and trace metals in the NC eastern lagoon. Water samples were collected in March 2016 along a series of river/lagoon/open-ocean transects. The absorption coefficient at 350 nm (a(350)) revealed...
Tipo: Text
Palavras-chave: CDOM; Fluorescence; Trace metals; Southwest Pacific; Coral reef lagoon; Rivers.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59307/62061.pdf

Probing connections between deep earth and surface processes in a land-locked ocean basin transformed into a giant saline basin: the Mediterranean GOLD project
Provedor de dados: 5
Autores: Rabineau, Marina; Cloetingh, S.; Kuroda, J.; Aslanian, Daniel; Droxler, A.; Gorini, C.; Garcia-castellanos, D.; Moscariello, A.; Burov, E.; Sierro, F.; Lirer, F.; Roure, F.; Pezard, P. A.; Matenco, L.; Hello, Y.; Mart, Y.; Camerlenghi, A.; Tripati, A.
During the last decade, the interaction of deep processes in the lithosphere and mantle with surface processes (erosion, climate, sea-level, subsidence, glacio-isostatic readjustment) has been the subject of heated discussion. The use of a multidisciplinary approach linking geology, geophysics, geodesy, modelling, and geotechnology has led to the awareness of coupled deep and surface processes. Deep earth dynamics (topography, erosion, tectonics) are strongly connected to natural hazards such as earthquakes, landslides, and tsunamis; sedimentary mass transfers have important consequences on isostatic movements and on georesources, geothermal energy repartitions. The ability to read and understand the link between deep Earth dynamics and surface processes...
Tipo: Text
Palavras-chave: Deep drilling; Geodynamics; Passive margins; Paleoclimate; Messinian erosional and salinity crisis; Deep biosphere; Georesources.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00256/36741/35342.pdf

Study of genetic damage in the japanese oyster induced by an environmentally-relevant exposure to diuron: evidence of vertical transmission of dna damage
Provedor de dados: 5
Autores: Barranger, Audrey; Akcha, Farida; Rouxel, Julien; Brizard, Raphael; Maurouard, Elise; Pallud, Marie; Menard, Dominique; Tapie, N.; Budzinski, Helene; Burgeot, Thierry; Benabdelmouna, Abdellah.
Pesticides represent a major proportion of the chemical pollutants detected in French coastal waters and hence a significant environmental risk with regards to marine organisms. Commercially-raised bivalves are particularly exposed to pollutants, among them pesticides, as shellfish farming zones are subject to considerable pressure from agricultural activities on the mainland.  The aims of this study were to determine (1) the genotoxic effects of diuron exposure on oyster genitors and (2) the possible transmission of damaged DNA to offspring and its repercussions on oyster fitness. To investigate these points, oysters were exposed to concentrations of diuron close to those detected in the Marennes-Oleron Basin (two 7-day exposure pulses at 0.4 and 0.6 μg...
Tipo: Text
Palavras-chave: Herbicide; Diuron; Oyster; Genotoxicity; Comet assay; Cytogenetics.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00162/27311/25541.pdf

Probiotic P-acidilactici application in shrimp Litopenaeus stylirostris culture subject to vibriosis in New Caledonia
Provedor de dados: 5
Autores: Castex, Mathieu; Chim, Liet; Pham, Dominique; Lemaire, Pierrette; Wabete, Nelly; Nicolas, Jean-louis; Schmidely, P; Mariojouls, C.
We studied the effects of a lactic acid bacterium, Pediococcus acidilactici (strain MA 18/5M, CNCM), as a dietary probiotic on growth performance and some nutritional and microbiological aspects of the shrimp Litopenaeus stylirostris. Experimental shrimp culture was carried out over 10 weeks, using floating cages of 14 m(2) each set in earthen ponds, in a New Caledonia farm affected by "Summer syndrome", a septicaemic vibriosis caused by Vibrio nigripulchritudo. The experiment design testing probiotic-coated pellets against control was replicated in two earthen ponds. High mortalities, characteristic of Summer syndrome, were observed during the first 2 weeks of the trial. The probiotic improved production in the treated cages from both ponds with increases...
Tipo: Text
Palavras-chave: Vibriosis; Floating cages; Litopenaeus stylirostris; Pediococcus acidilactici; Probiotic.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4079.pdf

Diversité génétique et dynamique du recrutement chez l'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Lapegue, Sylvie; Boudry, Pierre; Mira, Sara; Taris, Nicolas; Bonhomme, Francois.
In order to understand better some fundamental aspects of the bivalve biology, one has to pay attention to the variance of their breeding success, the time structure of the populations and their effective size. An abundant literature shows the existence of a heterozygote deficit as well as positive relationships between heterozygoty and fitness components. This last point is the subject of explanatory hypotheses which have never been clearly decided between until now. One of these hypotheses is the possible existence of a certain degree of inbreeding among those populations. This is only possible in the case of separated colonies coming from a small amount of spawners, thus creating blood relations between individuals recruited from the same area, and...
Tipo: Text
Palavras-chave: Reproducteur; Variabilité génétique; Génétique population; Diversité génétique; Ostrea edulis; Huître plate.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/acte-3494.pdf

Stratification of surface waters during the last glacial millennial climatic events: a key factor in subsurface and deep-water mass dynamics
Provedor de dados: 5
Autores: Wary, M.; Eynaud, F.; Sabine, M.; Zaragosi, S.; Rossignol, L.; Malaize, B.; Palis, E.; Zumaque, J.; Caulle, C.; Penaud, A.; Michel, E.; Charlier, K.
The last glacial period was punctuated by abrupt climatic events with extrema known as Heinrich and Dansgaard–Oeschger events. These millennial events have been the subject of many paleoreconstructions and model experiments in the past decades, but yet the hydrological processes involved remain elusive. In the present work, high-resolution analyses were conducted on the 12–42 ka BP section of core MD99-2281 retrieved southwest of the Faeroe Islands, and combined with analyses conducted in two previous studies (Zumaque et al., 2012; Caulle et al., 2013). Such a multiproxy approach, coupling micropaleontological, geochemical and sedimentological analyses, allows us to track surface, subsurface, and deep hydrological processes occurring during these rapid...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00296/40767/39770.pdf

Sécurité et conditions de travail à la pêche : petite pêche - pêche côtière - pêche au large
Provedor de dados: 5
This work concerns small-scale vessels, 12 to 18 m long, equipped for small-scale fishing, coastal fishing or offshore fishing. It complements the study published by Ifremer on safety and working conditions in small-scale fishing (vessels longer than 19 m) and in semi-industrial fishing and describes practices other than trawling, such as the use of traps, long lines or gillnets. Often subject to difficult and dangerous operating conditions, these vessels often have substantial safety problems due to their small size and low number of crew. As in our previous study, our research addresses the equipment and the lay-out of the vessels, the use of fishing gear and catch processing, on-board organisation and work schedules, working conditions (noise, lighting,...
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/rapport-4345.pdf

Le réseau de pathologie des mollusques. REPAMO
Provedor de dados: 5
Autores: Grizel, Henri.
The creation of a mollusc pathology network was in effect and made official during 1992. The subject of this document is to present this network, which has not yet achieved its definitive size.  Why this network?  The creation of this network responds to several institutional and scientific needs. Indeed, the setting up of control measures aimed at regulating mollusc exchanges notably via European Directive 91/67 and its transcription into French law has, as a corollary, caused the recognition of IFREMER as the agency charged with performing the analyses necessary for responding to the needs of this Directive, as far as marine invertebrates are concerned. Moreover, France being among the primary producers of shellfish in the world, the setting up of a...
Tipo: Text
Palavras-chave: Network; Pathology; Molluscs.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-1922.pdf

Identification et quantification des pigments chlorophylliens et caroténoïdes des sédiments marins : un protocole d'analyse par HPLC
Provedor de dados: 5
Autores: Brotas, V; Plantecuny, Mr.
A HPLC protocol is described which permits analysis of the pigment composition of coastal and intertidal sediments. The HPLC technique has been extensively applied to phytoplankton pigments for fifteen years. Papers dealing with living benthic microphytic populations have been more rare, due to complexity existing in the sediment surface, where pigments (chlorophylls and carotenoids) from several taxonomic groups of microalgae are mixed with degraded pigments from senescent phytoplankton cells and macrophytic material. The present paper describes in detail a protocol adapted from Kraay et al. (1992), which allows a good discrimination of photosynthetic pigments of microphytobenthos communities. The following procedure is recommended. Sediment samples are...
Tipo: Text
Palavras-chave: Plants pigments; Sediments; Protocol; HPLC.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00096/20730/18367.pdf

Sea surface temperature across the Subarctic North Pacific and marginal seas through the past 20,000 years: A paleoceanographic synthesis
Provedor de dados: 5
Autores: Davis, Catherine V.; Myhre, Sarah E.; Deutsch, Curtis; Caissie, Beth; Praetorius, Summer; Borreggine, Marisa; Thunell, Robert.
Deglacial sea surface conditions in the subarctic North Pacific and marginal seas are the subject of increasing interest in paleoceanography. However, a cohesive picture of near-surface oceanography from which to compare inter and intra-regional variability through the last deglaciation is lacking. We present a synthesis of sea surface temperature covering the open North Pacific and its marginal seas, spanning the past 20 ka using proxy records from foraminiferal calcite (δ18O and Mg/Ca) and coccolithophore alkenones (Uk’37). Sea surface temperature proxies tend to be in agreement through the Holocene, though Uk’37 records are often interpreted as warmer than adjacent δ18O or Mg/Ca records during the Last Glacial Maximum and early deglaciation. In the Sea...
Tipo: Text
Palavras-chave: Sea surface temperature; North Pacific; Bering sea; Sea of Okhotsk; Deglaciation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00646/75814/76758.pdf

Global Conservation Priorities for Marine Turtles
Provedor de dados: 5
Autores: Wallace, Bryan P.; Dimatteo, Andrew D.; Bolten, Alan B.; Chaloupka, Milani Y.; Hutchinson, Brian J.; Abreu-grobois, F. Alberto; Mortimer, Jeanne A.; Seminoff, Jeffrey A.; Amorocho, Diego; Bjorndal, Karen A.; Bourjea, Jerome; Bowen, Brian W.; Briseno Duenas, Raquel; Casale, Paolo; Choudhury, B. C.; Costa, Alice; Dutton, Peter H.; Fallabrino, Alejandro; Finkbeiner, Elena M.; Girard, Alexandre; Girondot, Marc; Hamann, Mark; Hurley, Brendan J.; Lopez-mendilaharsu, Milagros; Angela Marcovaldi, Maria; Musick, John A.; Nel, Ronel; Pilcher, Nicolas J.; Troeng, Sebastian; Witherington, Blair; Mast, Roderic B.
Where conservation resources are limited and conservation targets are diverse, robust yet flexible priority-setting frameworks are vital. Priority-setting is especially important for geographically widespread species with distinct populations subject to multiple threats that operate on different spatial and temporal scales. Marine turtles are widely distributed and exhibit intra-specific variations in population sizes and trends, as well as reproduction and morphology. However, current global extinction risk assessment frameworks do not assess conservation status of spatially and biologically distinct marine turtle Regional Management Units (RMUs), and thus do not capture variations in population trends, impacts of threats, or necessary conservation...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00050/16097/13573.pdf

Pattern formation in models of plankton dynamics. A synthesis
Provedor de dados: 5
Autores: Malchow, H; Petrovskii, S; Medvinsky, A.
The history of modelling plankton dynamics is already quite long and has been initiated by fishery science in the early 20th century. The main aim of modelling population dynamics is to improve the understanding of the functioning of food chains and webs and their dependence on internal and external conditions. Hence, mathematical models of biological population dynamics have not only to account for growth and interactions but also for spatial processes like random or directed and joint or relative motion of species as well as the variability of the environment. Early attempts began with physicochemical diffusion, exponential growth and Lotka-Volterra type interactions. These approaches have been continuously refined to more realistic descriptions of the...
Tipo: Text
Palavras-chave: Modélisation; Schémas de formation; Agrégation du plancton; Auto-organisation; Modelling; Pattern formation; Plankton patchiness; Self-organization.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43344/42882.pdf

Guidelines or the monitoring and assessment of plastic litter and microplastics in the ocean
Provedor de dados: 5
Autores: GESAMP.
The Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) has been involved in the issue of marine plastic litter and microplastics for over a decade. Initially interest was focussed on microplastics, which were considered as an emerging issue, and resulted in the preparation of a scoping paper. This was followed by an international workshop in 2010, organised by GESAMP, on the subject of: Microplastic particles as a vector in transporting persistent, bio-accumulating and toxic substances in the ocean. This was one of the first workshops that brought together representatives of the chemicals industry, academia, policy makers, intergovernmental organisations and NGOs. It was hosted by IOC-UNESCO in Paris, with...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69677/67545.pdf

Using a spatially structured life cycle model to assess the influence of multiple stressors on an exploited coastal-nursery-dependent population
Provedor de dados: 5
Autores: Archambault, B.; Rivot, E.; Savina-rolland, Marie; Le Pape, Olivier.
Exploited coastal-nursery-dependent fish species are subject to various stressors occurring at specific stages of the life cycle: climate-driven variability in hydrography determines the success of the first eggs/larvae stages; coastal nursery habitat suitability controls juvenile growth and survival; and fisheries target mostly adults. A life cycle approach was used to quantify the relative influence of these stressors on the Eastern English Channel (EEC) population of the common sole (Solea solea), a coastal-nursery-dependent flatfish population which sustains important fisheries. The common sole has a complex life cycle: after eggs hatch, larvae spend several weeks drifting in open water. Survivors go on to metamorphose into benthic fish. Juveniles...
Tipo: Text
Palavras-chave: Life cycle model; Spatial processes; Metapopulation; Coastal nursery habitat degradation; Fishing; Solea; Multiple stressors; Scenarios.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00301/41213/40367.pdf

Spatial compartmentalization of free radical formation and mitochondrial heterogeneity in bivalve gills revealed by live-imaging techniques
Provedor de dados: 5
Autores: Rivera-ingraham, Georgina A.; Rocchetta, Iara; Bickmeyer, Ulf; Meyer, Stefanie; Abele, Doris.
Background: Reactive oxygen (ROS) and nitrogen (RNS) species are produced during normal unstressed metabolic activity in aerobic tissues. Most analytical work uses tissue homogenates, and lacks spatial information on the tissue specific sites of actual ROS formation. Live-imaging techniques (LIT) utilize target-specific fluorescent dyes to visualize biochemical processes at cellular level. Results: Together with oxidative stress measurements, here we report application of LIT to bivalve gills for ex-vivo analysis of gill physiology and mapping of ROS and RNS formation in the living tissue. Our results indicate that a) mitochondria located in the basal parts of the epithelial cells close to the blood vessels are hyperpolarized with high Delta Psi m, whereas...
Tipo: Text
Palavras-chave: Bivalve; Gill; Live-imaging; Fluorescence; Mitochondria; ROS; RNS.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00626/73808/74412.pdf

Surface Ocean CO2 Atlas (SOCAT) Gridded Data Products
Provedor de dados: 5
Autores: Sabine, C. L.; Hankin, S.; Koyuk, H.; Bakker, D. C. E.; Pfeil, B.; Olsen, A.; Metzl, N.; Kozyr, A.; Fassbender, A.; Manke, A.; Malczyk, J.; Akl, J.; Alin, S. R.; Bellerby, R. G. J.; Borges, A.; Boutin, J.; Brown, P. J.; Cai, W. -j.; Chavez, F. P.; Chen, A.; Cosca, C.; Feely, R. A.; Gonzalez-davila, M.; Goyet, C.; Hardman-mountford, N.; Heinze, C.; Hoppema, M.; Hunt, C. W.; Hydes, D.; Ishii, M.; Johannessen, T.; Key, R. M.; Koertzinger, A.; Landschuetzer, P.; Lauvset, S. K.; Lefevre, N.; Lenton, A.; Lourantou, A.; Merlivat, L.; Midorikawa, T.; Mintrop, L.; Miyazaki, C.; Murata, A.; Nakadate, A.; Nakano, Y.; Nakaoka, S.; Nojiri, Y.; Omar, A. M.; Padin, X. A.; Park, G. -h.; Paterson, K.; Perez, F.f.; Pierrot, D.; Poisson, A.; Rios, A. F.; Salisbury, J.; Santana-casiano, J. M.; Sarma, V. V. S. S.; Schlitzer, R.; Schneider, B.; Schuster, U.; Sieger, R.; Skjelvan, I.; Steinhoff, T.; Suzuki, T.; Takahashi, T.; Tedesco, K.; Telszewski, M.; Thomas, H.; Tilbrook, B.; Vandemark, D.; Veness, T.; Watson, A. J.; Weiss, R.; Wong, C. S.; Yoshikawa-inoue, H.
A well documented, publicly available, global data set for surface ocean carbon dioxide (CO2) parameters has been called for by international groups for nearly two decades. The Surface Ocean CO2 Atlas (SOCAT) project was initiated by the international marine carbon science community in 2007 with the aim of providing a comprehensive, publicly available, regularly updated, global data set of marine surface CO2, which had been subject to quality control (QC). SOCAT version 1.5 was made public in September 2011 and holds 6.3 million quality controlled surface CO2 data from the global oceans and coastal seas, spanning four decades (1968–2007). The SOCAT gridded data is the second data product to come from the SOCAT project. Recognizing that some groups may have...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00141/25178/23284.pdf

Report of the Workshop on Age Reading of North Sea (IV) and Skagerrak-Kattegat (IIIa) Plaice (WKARP)
Provedor de dados: 5
The Workshop on Age reading of North Sea (IV) and Skagerrak-Kattegat (IIIa) plaice [WKARP] (Chair: Loes Bolle, The Netherlands) was held 2-5 November 2010 in IJmuiden, The Netherlands. The previous North Sea plaice workshop was held in 2003, and no information is available on when the last workshop was held for Skagerrak-Kattegat plaice. Therefore PGCCDBS called for an otolith exchange (2009-2010) followed by an age reading workshop (2010) for these 2 plaice stocks. The pri-mary aim of the exchange and workshop was to identify and resolve interpretation differences between readers and laboratories. Nine countries and 20 readers participated in the exchange. The same 9 countries and 14 readers participated in the workshop. The exchange and workshop otolith...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00049/16013/13474.pdf

Environmental factors influencing the seasonal dynamics of spring algal blooms in and beneath sea ice in western Baffin Bay
Provedor de dados: 5
Autores: Oziel, L.; Massicotte, P.; Randelhoff, A.; Ferland, J.; Vladoiu, A.; Lacour, L.; Galindo, V; Lambert-girard, S.; Dumont, D.; Cuypers, Y.; Bouruet-aubertot, P.; Mundy, C-j; Ehn, J.; Becu, G.; Marec, Claudie; Forget, M-h; Garcia, N.; Coupel, P.; Raimbault, P.; Houssais, M-n; Babin, M.
Arctic sea ice is experiencing a shorter growth season and an earlier ice melt onset. The significance of spring microalgal blooms taking place prior to sea ice breakup is the subject of ongoing scientific debate. During the Green Edge project, unique time-series data were collected during two field campaigns held in spring 2015 and 2016, which documented for the first time the concomitant temporal evolution of the sea ice algal and phytoplankton blooms in and beneath the landfast sea ice in western Baffin Bay. Sea ice algal and phytoplankton blooms were negatively correlated and respectively reached 26 (6) and 152 (182) mg of chlorophyll a per m(2) in 2015 (2016). Here, we describe and compare the seasonal evolutions of a wide variety of physical...
Tipo: Text
Palavras-chave: Under-ice bloom; Phytoplankton and sea ice algae; Arctic Ocean; Baffin Bay; Environmental conditions; Light and mixing.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62487/66800.pdf

Quantitative genetic variation for post-stress cortisol and swimming performance in growth-selected and control populations of European sea bass (Dicentrarchus labrax)
Provedor de dados: 5
Autores: Vandeputte, Marc; Porte, J. D.; Auperin, B.; Dupont-nivet, M.; Vergnet, Alain; Valotaire, C.; Claireaux, Guy; Prunet, P.; Chatain, Beatrice.
Sea bass is a major species in Mediterranean aquaculture, and is now being subject to selective breeding programs for faster growth. In terrestrial species, it was demonstrated that fast growth may be linked to a correlated degradation of fitness traits. In this experiment, we evaluated 600 young sea bass from a factorial mating of 76 sires and 13 dams. The sires were from four genetic groups, wild (W), domesticated (D), and selected for growth (2 groups, M and P). The 600 offspring were submitted to two acute confinement stress challenges at 6 weeks intervals, and plasma cortisol at one hour post stress was measured. The same fish were also submitted to two swimming challenges at a 5 days interval, where the maximum sustained swimming speed (Umax) of each...
Tipo: Text
Palavras-chave: Aquaculture; Selective breeding; Stress response; Maximum sustained swimming speed; Heritability; Correlated response.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00308/41955/41218.pdf

From here and now to there and then : practical recommendations for extrapolating cetacean density surface models to novel conditions
Provedor de dados: 5
Autores: Bouchet, Philippe; Miller, David Lawrence; Roberts, Jason; Mannocci, Laura; Harris, Catriona M.; Thomas, Len.
Density surface models (DSMs) are clearly established as a method of choice for the analysis of cetacean line transect survey data, and are increasingly used to inform risk assessments in remote marine areas subject to rising anthropogenic impacts (e.g. the high seas). However, despite persistent skepticism about the validity of extrapolated models, more and more DSMs are being applied well beyond the boundaries of the study regions where field sampling originally took place. This leads to potentially uncertain and error-prone model predictions that may mislead on-the-ground management interventions and undermine conservation decision-making. In addition, no consensus currently exists on the best way to define and measure extrapolation when it occurs,...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00515/62687/67073.pdf

Mesoscale Temporal Wind Variability Biases Global Air–Sea Gas Transfer Velocity of CO2 and Other Slightly Soluble Gases
Provedor de dados: 5
Autores: Gu, Yuanyuan; Katul, Gabriel G.; Cassar, Nicolas.
The significance of the water-side gas transfer velocity for air–sea CO2 gas exchange (k) and its non-linear dependence on wind speed (U) is well accepted. What remains a subject of inquiry are biases associated with the form of the non-linear relation linking k to U (hereafter labeled as f(U), where f(.) stands for an arbitrary function of U), the distributional properties of U (treated as a random variable) along with other external factors influencing k, and the time-averaging period used to determine k from U. To address the latter issue, a Taylor series expansion is applied to separate f(U) into a term derived from time-averaging wind speed (labeled as ⟨U⟩, where ⟨.⟩ indicates averaging over a monthly time scale) as currently employed in climate...
Tipo: Text
Palavras-chave: Carbon dioxide; Gas transfer velocity; Time-averaging; Wind speeds.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00687/79949/82869.pdf

Constraints on Black Sea outflow to the Sea of Marmara during the last glacial-interglacial transition
Provedor de dados: 5
Autores: Major, Candace; Ryan, William; Lericolais, Gilles; Hajdas, Irka.
New cores from the upper continental slope off Romania in the western Black Sea provide a continuous, high-resolution record of sedimentation rates, clay mineralogy, calcium carbonate content, and stable isotopes of oxygen and carbon over the last 20000 yr in the western Black Sea. These records all indicate major changes occurring at 15 000, 12 800, 8400, and 7 100 yr before present. These results are interpreted to reflect an evolving balance between water supplied by melting glacial ice and other river runoff and water removed by evaporation and outflow. The marked retreat of the Fennoscandian and Alpine ice between 15 000 and 14 000 yr is recorded by an increase in clays indicative of northern provenance in Black Sea sediments. A short return toward...
Tipo: Text
Palavras-chave: Clay mineralogy; Stable isotopes; Sapropel; Younger Dryas; Deglaciation.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-473.pdf

Capturing the big picture of Mediterranean marine biodiversity with an end-to-end model of climate and fishing impacts
Provedor de dados: 5
Autores: Moullec, Fabien; Velez, Laure; Verley, Philippe; Barrier, Nicolas; Ulses, Caroline; Carbonara, Pierluigi; Esteban, Antonio; Follesa, Cristina; Gristina, Michele; Jadaud, Angelique; Ligas, Alessandro; Díaz, Eduardo López; Maiorano, Porzia; Peristeraki, Panagiota; Spedicato, Maria Teresa; Thasitis, Ioannis; Valls, Maria; Guilhaumon, François; Shin, Yunne-jai.
The Mediterranean Sea is one of the main hotspots of marine biodiversity in the world. The combined pressures of fishing activity and climate change have also made it a hotspot of global change amidst increasing concern about the worsening status of exploited marine species. To anticipate the impacts of global changes in the Mediterranean Sea, more integrated modelling approaches are needed, which can then help policymakers prioritize management actions and formulate strategies to mitigate impacts and adapt to changes. The aim of this study was to develop a holistic model of marine biodiversity in the Mediterranean Sea with an explicit representation of the spatial, multispecies dynamics of exploited resources subject to the combined influence of climate...
Tipo: Text
Palavras-chave: Ecosystem model; Ecosystem Approach to Fisheries Management; OSMOSE model; NEMOMED model; Eco3M-S model; Global change.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62408/66668.pdf

Shellfish farming and coastal zone management (CZM) development in the Marennes-Oleron Bay and Charentais Sounds (Charente Maritime, France): A review of recent developments
Provedor de dados: 5
Autores: Goulletquer, Philippe; Le Moine, Olivier.
France is currently one of the leading shellfish production countries in Europe, harvesting more than 150,000 metric tons of the Pacific cupped oyster (Crassostrea gigas) and 60,000 tons of mussels (Mytilus edulis and M. galloprocincialis) each year. Among rearing areas, the Charentais Sounds and the Marennes-Oleron Bay rank first in Europe, with an annual production of 40,000 and 15,000 tons of oysters and mussels respectively. More than a third of French production is marketed from the Marennes-Oleron area. As natural C. gigas and M. edulis spatfall is limited to the Atlantic coast, the Marennes-Oleron Bay and the Charentais Sounds play a critical role nationally, representing more than half of French oyster and mussel spat production. The stocking...
Tipo: Text
Palavras-chave: Stepwise model of agreement; Environment aquaculture management; Conservation; Coastal zone management; Charentais Sounds; Bay of Marennes Oleron.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-481.pdf

Perspectives offertes par la communication entre un modèle hydrodynamique et un SIG pour l'aide au diagnostic environnemental : caractérisation de la dynamique et la qualité des masses d'eaux côtières.
Provedor de dados: 5
Autores: Loubersac, Lionel; Salomon, Jean-claude; Breton, Marguerite; Durand, Christophe; Gaudineau, Caroline.
This paper presents a set of solutions based on the synergy between GIS and a numerical model to help in diagnosis and decision making for water quality related matters. After an overview of the model features, it describes the computer interface (ModelView) implemented as an extension of the Arc View (ESRI) GIS System to provide operational data communication between the model and the GIS in vector or raster form. The paper particularly focuses on changes in the quality of coastal waters from river discharges. It looks at the spatio-temporal representation of this behaviour and the spatial analysis of sensitive areas that can be impacted. Examples are given of a French coastal area subject to strong human pressure, i.e. marine cultures and recreational...
Tipo: Text
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00189/30011/28492.pdf

Première évaluation des potentialités du satellite Spot pour la cartographie des peuplements benthiques superficiels de Méditerranée occidentale
Provedor de dados: 5
Autores: Meinesz, Alexandre; Belsher, Thomas; Boudouresque, Charles-françois; Lefevre, Jean-robert.
A Spot satellite image was processed to assess the suitability of this facility for the cartography of epibenthic populations and bottom types in the Mediterranean sublittoral fringe. The area studied was on the north coast of Porquerolles island (Hyeres, SE France). The treated data were compared with mapping carried out by diving. We show that satellite remote sensing may permit a distinction between certain epibenthic populations and bottom types down to 10 m depth. Thus the usefulness of the satellite is reduced where the sublittoral is steeply shelving, as the mappable area is narrow and represented by only a few pixels, each of which tends to overlap several separate biocoenoses. The image treated was obtained in June under very favourable...
Tipo: Text
Palavras-chave: POSIDONIA-OCEANICA; MAPPING; REMOTE SENSING; SPOT.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00183/29397/27762.pdf

Changes in planktonic microbial components in interaction with juvenile oysters during a mortality episode in the Thau lagoon (France)
Provedor de dados: 5
Autores: Richard, Marion; Bec, Beatrice; Vanhuysse, Charles; Mas, Sébastien; Parin, David; Chantalat, Camila; Le Gall, Patrik; Fiandrino, Annie; Lagarde, Franck; Mortreux, Serge; Ouisse, Vincent; Rolland, Jean-luc; Degut, Anaïs; Hatey, Elise; Fortune, Martine; Roque D'Orbcastel, Emmanuelle; Messiaen, Gregory; Munaron, Dominique; Callier, Myriam; Oheix, Jocelyne; Derolez, Valerie; Mostajir, Behzad.
Oysters modify the planktonic microbial community structure by their filtration and NH4 excretion activities. While many studies have been conducted on this subject with adult oysters, none had been carried out in situ with juveniles. Pacific oyster juveniles (Magallana gigas, previously Crassostrea gigas) died massively all over the world since 2008 in relation with OsHV-1 infection. During mortality episodes, sick and dead oysters are not separated from healthy live ones, and left to decay in the surrounding environment, with unknown consequences for the nutrient cycle and planktonic microbial components (PMC). The present study aimed to elucidate for the first time the interactions between oyster juveniles and PMC during a mortality episode. Innovative...
Tipo: Text
Palavras-chave: Magallana gigas; Crassostrea gigas; Spat; OsHV-1 mu Var; Mortality; Picoplankton; Heterotrophic flagellates; Ciliates; Uronema; Balanion.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00474/58559/61115.pdf

Analyse des tendances des séries temporelles de la concentration en azote minéral dissous dans les trois principaux estuaires de la façade Manche-Atlantique
Provedor de dados: 5
Autores: Gailhard, Isabelle.
Estuaries are areas which, from their structure, their fonctioning, and their localisation, are subject to significant contribution of nutrients. One of the objectif of the RNO, the French network for coastal water quality monitoring, is to assess the levels and trends of nutrient concentrations in estuaries. A linear model was used in order to describe and to explain the total dissolved nitrogen concentration evolution in the three most important estuaries on the Chanel-Atlantic front (Seine, Loire and Gironde). As a first step, the selection of a reliable data set was performed. Then total dissolved nitrogen evolution schemes in estuary environment were graphically studied, and allowed a resonable choice of covariables. The salinity played a major role...
Tipo: Text
Palavras-chave: Nutriments; Estuaire; Loire; Seine; Gironde; Schéma de dilution; Modèle linéaire; Tendance; Nutrients; Estuary; Seine; Loire; Gironde; Dilution schema; Linear mode1; Trend.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00079/19070/16665.pdf

A framework for the development of a global standardised marine taxon reference image database (SMarTaR-ID) to support image-based analyses
Provedor de dados: 5
Autores: Howell, Kerry L.; Davies, Jaime S.; Allcock, A. Louise; Braga-henriques, Andreia; Buhl-mortensen, Pål; Carreiro-silva, Marina; Dominguez-carrió, Carlos; Durden, Jennifer M.; Foster, Nicola L.; Game, Chloe A.; Hitchin, Becky; Horton, Tammy; Hosking, Brett; Jones, Daniel Ob; Mah, Christopher; Laguionie Marchais, Claire; Menot, Lenaick; Morato, Telmo; Pearman, Tabitha R. R.; Piechaud, Nils; Ross, Rebecca E.; Ruhl, Henry A.; Saeedi, Hanieh; Stefanoudis, Paris V.; Taranto, Gerald H.; Thompson, Michael B.; Taylor, James R.; Tyler, Paul; Vad, Johanne; Victorero, Lissette; Vieira, Rui P.; Woodall, Lucy C.; Xavier, Joana R.; Wagner, Daniel.
Video and image data are regularly used in the field of benthic ecology to document biodiversity. However, their use is subject to a number of challenges, principally the identification of taxa within the images without associated physical specimens. The challenge of applying traditional taxonomic keys to the identification of fauna from images has led to the development of personal, group, or institution level reference image catalogues of operational taxonomic units (OTUs) or morphospecies. Lack of standardisation among these reference catalogues has led to problems with observer bias and the inability to combine datasets across studies. In addition, lack of a common reference standard is stifling efforts in the application of artificial intelligence to...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00602/71408/69862.pdf

Defining the stock structures of key commercial tunas in the Pacific Ocean II: Sampling considerations and future directions
Provedor de dados: 5
Autores: Moore, Bradley R.; Adams, Tim; Allain, Valerie; Bell, Johann D.; Bigler, Mark; Bromhead, Don; Clark, Sangaa; Davies, Campbell; Evans, Karen; Faasili, Ueta; Farley, Jessica; Fitchett, Mark; Grewe, Peter M.; Hampton, John; Hyde, John; Leroy, Bruno; Lewis, Antony; Lorrain, Anne; Macdonald, Jed I.; Marie, Amandine D.; Minte-vera, Carolina; Natasha, Janice; Nicol, Simon; Obregon, Pablo; Peatman, Thomas; Pecoraro, Carlo; Phillip, N. Bradley; Pilling, Graham M.; Rico, Ciro; Sanchez, Caroline; Scott, Robert; Scutt Phillips, Joe; Stockwell, Brian; Tremblay-boyer, Laura; Usu, Thomas; Williams, Ashley J.; Smith, Niamh.
Delineating the stock structure of highly-mobile, wide-ranging fishes subject to exploitation is a challenging task, yet one that is fundamental to optimal fisheries management. A case in point are stocks of skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus) and albacore tuna (Thunnus alalunga) in the Pacific Ocean, which support important commercial, artisanal, subsistence, and recreational fisheries, and contribute roughly 70 % of global commercial tuna catches. Although some spatial and temporal structuring is recognised within these stocks, growing evidence from a range of approaches suggests that the stock structure of each tuna species is more complex than is currently assumed in both stock assessment...
Tipo: Text
Palavras-chave: Tuna; Pacific Ocean; Movement; Spatial dynamics; Stock structure; Fisheries management.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00630/74168/73773.pdf

Developing a multispecific stocks MSE framework : English Channel and North Sea Rajidae complex
Provedor de dados: 5
Autores: Amelot, Morgane; Batsleer, Jurgen; Foucher, Eric; Girardin, Raphael; Marchal, Paul; Poos, Jan Jaap; Sys, Klaas.
Six Rajidae stocks (Raja clavata, Raja brachyura, Raja montagui, Raja microocellata, Leucoraja naevus and Raja undulata) are currently exploited in the English Channel and North Sea area (ICES divisions 3a, 4 and 7d) and subject to a TAC regulation. This TAC is set based on monospecific approaches (abundance indices) when mangement is complex based. However, stock status disparities exist between these species. In this context a multispecific MSE (Management Strategy evaluation) framework has been developped based on DLMTool package from R. The main objective was to estimate the complex management impact at the different steps of stocks management (data collect, assessment, management measures implementation). The species species assessement and ...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76423/77495.pdf

Mediterranean nascent sea spray organic aerosol and relationships with seawater biogeochemistry
Provedor de dados: 5
Autores: Freney, Evelyn; Sellegri, Karine; Nicosia, Alessia; Trueblood, Jonathan T; Rinaldi, Matteo; Williams, Leah R; Prévôt, André Sh; Thyssen, Melilotus; Gregori, Gerald; Haëntjens, Nils; Dinasquet, Julie; Obernosterer, Ingrid; Van Wambeke, France; Engel, Anja; Zancker, Birthe; Desboeufs, Karine; Asmi, Eija; Timmonen, Hilka; Guieu, Cécile.
The organic mass fraction from sea spray aerosol (SSA) is currently a subject of intense research. The majority of this research is dedicated to measurements in ambient air, although recently a small number of studies have additionally focused on nascent sea spray aerosol. This work presents measurements collected during a five-week cruise in May and June 2017 in the central and western Mediterranean Sea, an oligotrophic marine region with low phytoplankton biomass. Surface seawater was continuously pumped into a bubble bursting apparatus to generate nascent sea spray aerosol. Size distributions were measured with a differential mobility particle sizer (DMPS). Chemical characterization of the submicron aerosol was performed with a time of flight aerosol...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/80017/82995.pdf

Harmonisation des suivis de la mégafaune invertébrée benthique sur les campagnes halieutiques de l’Ifremer
Provedor de dados: 5
Autores: Hazevis, Gaëtan.
Ifremer conducts many fisheries surveys dedicated to benthic and demersal populations (commercial/non-commercial fishes and invertebrates). For several years, in accordance with the ecosystem approach, all benthic invertebrate fauna collected in fishing gear have been systematically monitored. These additional data are sometimes collected at the initiative of the teams, without particular methodological coordination between the surveys. Their collection is often not subjected to any contractual obligation while they are increasingly used in research or in support to public policies. Thus, disparities in the implementation of the sampling protocol and in the precision of the identification of the taxa are observed between surveys, particularly as a function...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00587/69920/67821.pdf

Drivers and uncertainties of future global marine primary production in marine ecosystem models
Provedor de dados: 5
Autores: Laufkoetter, C.; Vogt, M.; Gruber, N.; Aita-noguchi, M.; Aumont, Olivier; Bopp, L.; Buitenhuis, E.; Doney, S. C.; Dunne, J.; Hashioka, T.; Hauck, J.; Hirata, T.; John, J.; Le Quere, C.; Lima, I. D.; Nakano, H.; Seferian, R.; Totterdell, I.; Vichi, M.; Voelker, C.
Past model studies have projected a global decrease in marine net primary production (NPP) over the 21st century, but these studies focused on the multi-model mean rather than on the large inter-model differences. Here, we analyze model-simulated changes in NPP for the 21st century under IPCC's high-emission scenario RCP8.5. We use a suite of nine coupled carbon-climate Earth system models with embedded marine ecosystem models and focus on the spread between the different models and the underlying reasons. Globally, NPP decreases in five out of the nine models over the course of the 21st century, while three show no significant trend and one even simulates an increase. The largest model spread occurs in the low latitudes (between 30 degrees S and 30...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00302/41333/40511.pdf

Genetic effect of domestication selective pressures on Pacific oyster at larval stage
Provedor de dados: 5
Autores: Taris, Nicolas; Sauvage, Christopher; Ernande, Bruno; Boudry, Pierre.
Among bivalve species, the Pacific oyster, Crassostrea gigas, is the most economically important bivalve production over the world. Today, C. gigas is subject to an important production effort that leads to an intensive artificial selection. Larval stage is relatively unknown, specifically in a domestication context. Genetic consequence of artificial selection is still at a preliminary study. We aimed to tackle the consequence of inconscient domestication on the variance reproductive success focusing on larval stage, keystone of the life cycle. We studied two kinds of specific selective processes that common hatchery rearing practices exert : the effect of discarding the smallest larvae on genetic diversity and the artificial environment rearing effect via...
Tipo: Text
Palavras-chave: Selection; Genetic correlations; Genetic variability; Genetic; Domestication selective; Crassostrea gigas; Pacific oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3441.pdf

Area-based management and fishing efficiency
Provedor de dados: 5
Autores: Marchal, Paul; Ulrich, Clara; Pastoors, M.
The scope of this study is to investigate the extent to which area-based management may have influenced the fishing efficiency of the Danish and Dutch demersal fleets harvesting cod, plaice and sole in the North Sea. Special consideration is given to the 'plaice box', a restricted area where fishing is prohibited to towed-gear fleets of horsepower exceeding 300 hp. An index of fishing power is calculated as the log-ratio between the catch per unit effort (CPUE) of any vessel and some survey abundance index. Annual trends in fishing are calculated as the year-effect derived from a general linear model (GLM) analysis of the index of fishing power. The fishing efficiency of Danish gill-netters and, to some extent, Danish seiners, has overall increased inside...
Tipo: Text
Palavras-chave: Fishing efficiency; Plaice box; Fisheries management; North Sea; Demersal fisheries.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00589/70118/68112.pdf

Catalogue international des activités des flottilles de Manche, approche des interactions techniques
Provedor de dados: 5
Autores: Tetard, A; Boon, M; Bennett, D; Berthou, Patrick; Bossy, S; Casey, J; De Clerck, R; Delpech, Jean-paul; Dintheer, C; Giret, M; Large, P; Latrouite, Daniel; Lemoine, Michel; Millner, R; Morizur, Yvon; Ozanne, S; Palmer, D; Pawson, M; Pickett, G; Vince, M.
This work is the result of collaboration between the English, French, Channel Isles and Belgian laboratories which are involved in a study of the English Channel. Its subject is the activities of fleets and fleet interactions, and it complements other work on the biogeographical identification of Channel fish and shellfish stocks (published), and on modelling the fleets' interactions as they exploit the resources (in preparation). The concept of a métier is defined as being the use of one fishing gear to catch one or several species targeted during a particular season in a given area. On this basis, 74 métiers were identified during 1989-90. For each métier we give a brief description of the catching gear, the target species and most usual by-catch, the...
Tipo: Text
Palavras-chave: Fisheries management; Fishing effort; Technical interactions; English Channel; Métier; Gestion des pêcheries; Distribution de l'effort de pêche; Interactions techniques; Manche; Métiers.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-704.pdf

Catalogue international des activités des flottilles de Manche, approche des interactions techniques
Provedor de dados: 5
Autores: Tetard, A; Boon, M; Bennett, D; Berthou, Patrick; Bossy, P; Casey, J.
This work is the result of collaboration between the English, French, Channel Isles and Belgian laboratories which are involved in a study of the English Channel. Its subject is the activities of fleets and their interactions, and it complements other work on the biogeographical identification of Channel fish and shellfish stocks (published), and on modelling the fleets' interactions as they exploit theresources (in preparation). The concept of a metier is defined as being the use of one fishing gear to catch one or several species targeted during a particular season in a given area. On this basis, 74 metiers were identified during 1989-90. For each metier we give a brief description of the catching gear, the target species and most usual by-catch, the...
Tipo: Text
Palavras-chave: Fisheries management; Fishing effort; Technical interactions; English Channel; Metier; Gestion des pêcheries; Distribution de l'effort de pêche; Interactions techniques; Manche; Métiers.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-3836.pdf

The role of the cryosphere in source-to-sink systems
Provedor de dados: 5
Autores: Jaeger, John M.; Koppes, Michele N.
Glacial erosion and sediment production are of interest to diverse scientific communities concerned with the interaction of climatic, tectonic and surface processes that influence the evolution of orogens and with the climatic signals archived in glacigenic strata. We review the current state of knowledge on the generation, transfer, and accumulation of glacigenic sediment from land to sea. We draw from geomorphology, marine geology, geochronology, numerical modeling of surface processes and landscape evolution, and experimental and field observations of glacier erosion and deposition, and the interaction of ice with its bed and the ocean boundary. Our primary goal is to examine glacial systems using a holistic source-to-sink approach, with a focus on...
Tipo: Text
Palavras-chave: Ice dynamics; Glacial history; Glacigenic sediment; Glacimarine sedimentary processes; High-latitude continental margins; Quaternary stratigraphy.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00496/60799/64919.pdf

Etude de déploiement d'un réseau LoRa en mer
Provedor de dados: 5
Autores: Damour, Valentin.
This report is about the work realized during a part time training at Ifremer. The subject discussed in this paper will associate the maritime field and the computer science field. It proves that computer science is really a  multipurpose domain. In a context of global warming and human pressure (pollution and ressources over-exploitation), the marine ecosystem is jeopardized. In order to have a better understanding of the situation of this habitat and to stem these brutal changes, it is important to observe and gather information about it. It is exactly the goal of the project I took part in. This project mainly deals with observing sea turtles in their natural habitat. Thoses observations are realized thanks to LoRa equiped tags which are implanted on...
Tipo: Text
Palavras-chave: Réseau tolérant au délai; Océan Indien; Tortues marines; Modélisation; Delay-tolerant network; Indian Ocean; Sea turtles; Modeling.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00612/72364/71279.pdf

Réseau de surveillance benthique – Région Bretagne. Approche sectorielle subtidale : Identification et caractérisation des habitats benthiques du secteur Quiberon
Provedor de dados: 5
Autores: Ehrhold, Axel; Hamon, Dominique; Chevalier, Claire; Gaffet, Jean-dominique; Caisey, Xavier; Blanchet, Aline; Alix, Anne-sophie.
In 2000 Ifremer launched and coordinated the development of a monitoring strategy for the REBENT network (REseau BENThique) in order to assess the aftermath of the “Erika” oil spill which took place in December 1999. Its aim is to provide consistent baseline knowledge on coastal benthic habitats, as well as to develop a monitoring tool that detects changes at various spatial and temporal scales Sector-based seabed habitat mapping in shallow water (&lt; 50 m deep), is currently being conducted throughout Brittany's coastal waters using a combination of geoacoustic marine systems together with ground-truthing using biological grab sampling and seabed observations. The study area in the bay of Quiberon is characterised by a large array of sedimentological...
Tipo: Text
Palavras-chave: Rebent; Baie de Quiberon; Cartographie d’habitats; Sonar latéral; Macrofaune benthique; Peuplements; Dynamique sédimentaire; Figures sédimentaires; Rebent; Quiberon bay; Mapping; Sidescan sonar; Benthic macrofauna; Communities; Bedload transport; Bedforms.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00281/39179/37741.pdf

The Gulf of Maine biogeographical information system project: developing a spatial data management framework in support of OBIS
Provedor de dados: 5
Autores: Tsontos, Vm; Kiefer, Da.
Central to the development of an inventory of marine life and improved conceptual understanding of the mechanisms that dynamically shape species distribution patterns is the implementation of strategies aimed at enhancing assimilation and access to existing biogeographical information. Using the Internet as a medium, the Gulf of Maine Biogeographic Information System (GMBIS) project provides a framework and a set of reusable tools for the integration, visualization, analysis and dissemination of diverse types of biogeographical and oceanographic information. End-to-end viability of this approach is demonstrated in the context of a series of scientific storylines and a pilot application for the Gulf of Maine (GoM), a well-studied ecosystem that has been...
Tipo: Text
Palavras-chave: Système d'information; Biogéographie; Biodiversité; Golfe du Maine; Information system; GIS; Biogeography; Biodiversity; Gulf of Maine.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43302/43038.pdf

Live−dead comparison of benthic foraminiferal faunas from the Rhône prodelta (Gulf of Lions, NW Mediterranean): Development of a proxy for palaeoenvironmental reconstructions
Provedor de dados: 5
Autores: Goineau, A.; Fontanier, Christophe; Mojtahid, M.; Fanget, Anne-sophie; Bassetti, M-a.; Berne, Serge; Jorissen, F.
Dead benthic foraminiferal faunas (&gt; 150 μm) from the Rhône prodelta (Gulf of Lions, NW Mediterranean) were analysed at 41 stations (15–100 m water depth) sampled in June 2005 and September 2006, and compared to the living faunas investigated during previous studies at the same stations. The comparison between dead and living assemblages enhances the understanding of taphonomic processes that may modify the composition of the dead faunas in this area. We observed a loss of individuals from living to dead assemblages of species characterised by a fairly fragile test and therefore more prone to fragmentation or dissolution (e.g., Bolivina alata, Quinqueloculina tenuicollis). Allochthonous dead and/or live specimens may be transported to some parts of the...
Tipo: Text
Palavras-chave: Benthic foraminifera; Rhone prodelta; Taphonomy; Thanatofacies; Palaeoceanography.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38399/36725.pdf

Updated geographic range maps for giraffe, Giraffa spp., throughout sub‐Saharan Africa, and implications of changing distributions for conservation
Provedor de dados: 5
Autores: O'Connor, David; Stacy‐dawes, Jenna; Muneza, Arthur; Fennessy, Julian; Gobush, Kathleen; Chase, Michael J.; Brown, Michael B.; Bracis, Chloe; Elkan, Paul; Zaberirou, Abdoul Razazk Moussa; Rabeil, Thomas; Rubenstein, Dan; Becker, Matthew S.; Phillips, Samantha; Stabach, Jared A.; Leimgruber, Peter; Glikman, Jenny A.; Ruppert, Kirstie; Masiaine, Symon; Mueller, Thomas.
Giraffe populations have declined in abundance by almost 40% over the last three decades, and the geographic ranges of the species (previously believed to be one, now defined as four species) have been significantly reduced or altered. With substantial changes in land uses, loss of habitat, declining abundance, translocations, and data gaps, the existing geographic range maps for giraffe need to be updated. We performed a review of existing giraffe range data, including aerial and ground observations of giraffe, existing geographic range maps, and available literature. The information we collected was discussed with and validated by subject‐matter experts. Our updates may serve to correct inaccuracies or omissions in the baseline map, or may reflect actual...
Tipo: Text
Palavras-chave: Aerial survey; Africa; Decline; Endangered; Geographic range; Giraffe; Spatial ecology.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62106/66281.pdf

Morphology of the Eyeball, Orbit and Retina of Atlantic Salmon (Salmo Salar) Alevins under Hypoxic Conditions
Provedor de dados: 77
Autores: Pellón,Mario; Rojas,Mariana; Saint-Pierre,Gustavo; Hartley,Ricardo; del Sol,Mariano.
It has been demonstrated that hypoxia retards the growth of fish, reduces the survival of their larvae, deforms their vertebral column, but despite this teleost fish have the ability to completely regenerate many of their tissues, particularly the retina. As we do not have enough information about the effects of hypoxia on the eyeball, orbit and retina of Atlantic salmon (Salmo salar), we propose the following objectives: 1) Compare the morphological changes of the eyeball of fish subject to hypoxia and normoxia. 2) Determine changes in the orbit structure. 3) Describe the retina of salmon alevins. 4). Recognize hypoxic cells using the anti-Hif1a antibody in the retina of alevins as a sensor. 5) Determine the Shh morphogenic expression in alevins exposed...
Tipo: Journal article
Palavras-chave: Eyeball; Orbit; Retina; Salmo salar; Hypoxia; HIF1a; Shh.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100046

The distribution of introduced mollusc species in Southern Africa
Provedor de dados: 16
Autores: Bruggen, A.C. van.
Artificial distribution patterns of animals and plants may be defined as those caused or fostered deliberately or accidentally by man. Consequently we can distinguish two types of artificial distribution, viz., that of animals accidentally distributed by man (rats, mice, insects, slugs, etc.) and that of animals deliberately transported by man (domestic and pet animals; species involved in transmission of game animals and biological control of insects and plants, etc.). A considerable proportion of accidentally transported animals is made up of non-marine molluscs and it appears that there are few countries on the seaboard that have not yet experienced the immigration of some foreign pulmonate. Accidental transport, invasion and establishment can only be...
Tipo: Article / Letter to the editor
Ano: 1964
URL: http://www.repository.naturalis.nl/record/505130

Boekaankondigingen
Provedor de dados: 16
Autores: Meijden, R. van der.
The subject of this thesis is a monograph of the genus Arctium, now including also five species formerly placed into Cousinia. Based on herbarium material and some field observations, this study presents new insights on three subjects: a) the generic delimitation of Arctium, limitation within the A. minus-complex, b) the species deand c) the occurrence of hybridisation. It soon became clear, rather surprisingly, that five species of Cousinia possess hooked involucral bracts like Arctium in its classical concept. The study became focussed then on the relation between Arctium in its classical delimilation and the large Asian genus Cousinia. From a macromorphological point of view the five ‘arctioid’ species of Cousinia should be placed in the extended genus...
Tipo: Article / Letter to the editor
Ano: 1996
URL: http://www.repository.naturalis.nl/record/526672

A Tragedy of Borneo
Provedor de dados: 16
Autores: NN.
It was a nice and cool evening in October 1958, when we were sitting in all safety and comfort in the Resthouse at Ranau. The sky had cleared up and Mt Kinabalu dominated the scenery in all its rugged majesty. Mr D.I. Nicholson, the Ecologist of Sandakan, and I were to start next day to climb the mountain. The preparations had been made, and, lingering around, my eye fell on a booklet on the table. It was ”A Tragedy of Borneo 1941-1945”, and its subtitle was ”Kinabalu National Memorial Park Project”. While reading, I became deeply impressed. The Tragedy of Borneo began seriously in September 1944. Then the 2400 prisoners, 1800 Australians and 600 Englishmen, who had been kept in a P.O.W. camp at Sandakan, were driven by the Japs westward, into the...
Tipo: Article / Letter to the editor
Ano: 1960
URL: http://www.repository.naturalis.nl/record/533326

Bottom sediments of the Ría de Arosa (Galicia, NW Spain)
Provedor de dados: 16
Autores: Koldijk, W.S.
The subject of this study is the largest of the ‘classical’ rias in W. Galicia, the Ría de Arosa (length 25 km, depths of over 65 m). The bottom of the ria displays a complex topography. The wide variety of the surrounding rock types results in the supply of heavy minerals and clay minerals of a variegated composition. The different types of sediment occurring in the bay are described. The results of various laboratory analyses of some 400 grab samples form the basis of the discussions, but punch-core and boring samples were also studied. The present sedimentary processes are inferred from data obtained from textural and petrographical analyses in combination with the oceanographical and biological characteristics of the ria. Two types of bioclasts are...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/505802

Variability of the female reproductive organs in Ginkgo biloba L
Provedor de dados: 16
Autores: Karstens, W.K.H.
Prom a number of Ginkgo trees kernels were examined. The investigation of the variability of the material was greatly favoured by the large number of stones, in total about 4700. In addition, one tree, grown in the Botanic Garden at Leyden, supplied the material for an investigation of the variability of the female “flowers”, in total about 1700. 1. The number of female “flowers” or rather macrosporangiophores on the brachyblasts (short shoots) proved to be most variable, showing a correlation with the age of the shoot (Table I, fig. 1). 2. A subdivision of the macrosporangiophores into a series of types proved to be possible (Table II, fig. 2-3). 3. A certain relation between the shape of the macrosporangiophore and the shape of the leafy organs from...
Tipo: Article / Letter to the editor
Ano: 1945
URL: http://www.repository.naturalis.nl/record/524732

A fabric study of Lherzolites
Provedor de dados: 16
Autores: Collée, A.L.G.
The solution of the problem whether the ultrabasic inclusions in lavas are accumulation products of early crystallized minerals of the lavas in which they occur, or fragments of the earth’s peridotite shell carried to the surface by the eruptive force of the lavas, largely depends on the answer to the question whether these inclusions are tectonites or not. The structure of the specimens from Auvergne (France), which formed the main subject of this study, has been proved conclusively to be of a tectonic nature, from the macroscopically visible intersecting slip planes which are definitely younger than the banding of the specimen, as well as from microscopic evidence that suggests that both the olivine and enstatite crystals are concentrated in the...
Tipo: Article / Letter to the editor
Ano: 1963
URL: http://www.repository.naturalis.nl/record/505921

In memorium Dr. Agatha Gijzen (1904-1995), eminent museum historian and zoo biologist
Provedor de dados: 16
Autores: Bruggen, A.C. van.
Dr Agatha Gijzen (Rotterdam *9 October 1904, Merksem/Belgium †19 February 1995) was a remarkable zoologist in more than one respect. Although her professional career, spanning more than three and a half decades, was largely spent as a staff zoologist in the service of the famous Antwerp/ Planckendael zoological gardens complex in Belgium (1947-1974), she had already made her name as a zoologist/historian by obtaining her Ph.D. degree in 1938 on an extensive first study of the history of the Rijksmuseum van Natuurlijke Historie in Leiden, the national museum of natural history of The Netherlands. She properly organized the archives of the museum for the very first time and her published doctoral thesis (unfortunately only available in Dutch; summary in...
Tipo: Article / Letter to the editor
Palavras-chave: History of zoology; History of natural history museums; Rijksmuseum van Natuurlijke Historie; Zoo biology; Antwerp Zoo; Planckendael Zoo; Mammalia; Giraffidae: Okapia; 42.01.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/318966

PRELIMINARY BASELINE SURVEY OF AVIFAUNAL DIVERSITY IN JIMMA ZONE, SOUTH-WESTERN ETHIOPIA
Provedor de dados: 17
Autores: Haile Yineger; Kitessa  Hundera; Bruktawit Abdu; Tifases Beyene; James Kuria Ndungu&amp;#x27;; Cagan Hakki  Sekercioglu; Olivier Honnay; Bart Muys; Raf Aerts; Luc Lens.
Multidimensional poverty, which is deeply-rooted within least-developed African countries like Ethiopia, is forcing local people to heavily rely on natural resources for their subsistent livelihoods. As a result, remaining wilderness areas in tropical Africa which support huge but little known biological diversity, are subject to extensive habitat loss, fragmentation and degradation in turn causing loss of plant and animal species and ecosystem services provided by them. Coffee forest fragment within the Jimma Zone of Ethiopia cannot be expected to be an exception to such scenario. Taking this persistent problem into consideration, we carried out a preliminary survey of bird biodiversity in selected areas of Jimma Zone during a short term bird ringing...
Tipo: Poster
Palavras-chave: Ecology.
Ano: 2010
URL: http://precedings.nature.com/documents/4185/version/1

Fracture Toughness of Human Solid Cancers
Provedor de dados: 17
Autores: Nagesh Ragavendra; William Klug; J Woody  Ju.
Human solid cancers typically are harder and firmer than surrounding normal tissue upon clinical palpation. This characteristic has been linked to the presence of abundant collagen in the tumor stroma, referred to as the desmoplastic reaction. Recent evidence indicates that tumor-associated desmoplastic stroma is critical to cancer&amp;#x2019;s growth and progression. However, how best to measure, interpret, and/or model the mechanical attributes of tumor microenvironment in vivo remain unclear. &amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;During routine sonographically-guided fine needle biopsy of solid tumors of the human thyroid gland, it was serendipitously observed by the lead author that the nature and strength of the haptic force feedback cues varied among...
Tipo: Presentation
Palavras-chave: Biotechnology; Cancer.
Ano: 2008
URL: http://precedings.nature.com/documents/2461/version/1

Sedimentation, transport und erosion an der  Nordküste Kolumbiens zwischen Barranquilla und der Sierra Nevada de Santa Marta
Provedor de dados: 20
Autores: Erffa, A. Frhr. von.
El Río Magdalena desemboca actualmente en el mar Caribe, por el extremo occidental de este territorio y ha formado varios deltas, estos se han originado en tres fases comprendidas en el cuaternario reciente. Los dos más antiguos quedaron destruidos por la erosión y solamente son detectados en la morfología submarina. El delta siguiente en antigüedad, alcanzó su mayor amplitud hace 2.400 años aproximadamente La etapa de destrucción de este delta se inició por aquellos tiempos, y aún continua en actividad. El delta más reciente se está formando al frente de la boca actual del Río Magdalena. Se describen los rasgos topográficos, sedimentológicos y la distribución de la fauna bentónica, en los sectores NE y E de la plataforma submarina de San Andrés. La...
Tipo: Journal Contribution
Palavras-chave: Coastal lagoons; Estuaries; Geology; Sediments; Erosion; Coastal erosion; Sediment transport; Estuaries; Geology; Erosion; Coastal lagoons; Coastal erosion; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_3232; Http://aims.fao.org/aos/agrovoc/c_2651; Http://aims.fao.org/aos/agrovoc/c_1697; Http://aims.fao.org/aos/agrovoc/c_9949.
Ano: 1973
URL: http://hdl.handle.net/1834/3254

Estudio de la condición nutricional de larvas de la población bonaerense de anchoíta (Engraulis anchoita) en relación con las características hidrográficas del área de crianza
Provedor de dados: 20
Autores: Díaz, M.V.; Pájaro, M.
The study of larvae nutritional condition allows to assess the physiologic state that reflects the environmental situation they were exposed to. It represents a useful instrument to determine favourable nursery areas, provides tools for the management of a population subject to fishing and furnishes information to establish appropriate closed areas and periods. The material analyzed derived from three cruises carried out to assess Argentine anchovy Northern stock during the 2003, 2004 and 2006 reproductive peak (SW Atlantic Ocean, Argentine Sea). The objective of this work was to study the nutritional status of Argentine anchovy first feeding larvae caught in the coastal and mid-shelf of the Río de la Plata River maritime front in relation to the...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Nursery grounds; Spawning populations; Morphometry; Length-weight relationships; Abundance.
Ano: 2013
URL: http://hdl.handle.net/1834/5496

Parámetros reproductivos de la raya Dipturus chilensis en el atlántico sudoccidental (34ºS-48ºS)
Provedor de dados: 20
Autores: Colonello, J.H.; Cortés, F.
A total of 807 Dipturus chilensis specimens (448 males and 359 females) caught in research cruises performed by the National Institute for Fisheries Research and Development (INIDEP) during 2011 and 2012 were analyzed. The cruises were carried out between (34°S-48°S) and 50-313 m depth. Mean size at first maturity (TL50) was estimated at 780 mm and 908 mm TL for males and females, respectively, values that represented about 80% of the respective maximum total length observed. Besides, latitudinal differences in sexual maturity estimates were detected. The total number of 4-7 reproductive seasons and 42-52 follicles or individuals of maximum annual potential fecundity estimated in this paper allow to suggest that each female would produce less than 300 eggs...
Tipo: Journal Contribution
Palavras-chave: Morphometry; Sexual maturity; Fecundity; Fishery surveys; Abundance; Dipterus chilensis; Marine environment.
Ano: 2014
URL: http://hdl.handle.net/1834/5820

Seychelles tuna bulletin : first semester 2006
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transhipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea. For purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transhipment.  Readers should note that many of the figures presented here are subject to revision (usually upwards) as...
Tipo: Other
Palavras-chave: Tuna fisheries; Catch statistics; Purse seiners; Foreign fishing; Data.
Ano: 2007
URL: http://hdl.handle.net/1834/5183

Long-term Trends in Coral Reef Fish Yields and Exploitation Rates of Commercial Species from Coastal Kenya
Provedor de dados: 20
Autores: Kaunda-Arara, B.; Rose, G.A.; Muchiri, M.S.; Kaka, R.
Analysis of long-term (1978–2001) marine fisheries data showed that Kenyan coralreefs produced an estimated 2–4 metric t/km2/year of demersal fish. A rapid overall decline in landings occurred during the 1990s. Yields (t/km2/year) showed bimodal peaks in 1982 (2.98) and 1991 (2.90). The average total landings dropped by 55% during the last decade following peak landings in 1982. Landings of the commercially important families (e.g., Siganidae, Lethrinidae, Lutjanidae and Serranidae) declined by about 40% during the last decade, with the groupers (Serranidae) showing the steepest (72%) decline. Analysis of landings per administrative district showed a 78% decline in the densely populated Mombasa district between the periods 1983–1991 and 1992–2001. The less...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Reef fish.
Ano: 2003
URL: http://hdl.handle.net/1834/959

Estimación de parámetros poblacionales del efectivo de sardina fueguina (Sprattus fuegensis) de la costa continental Argentina.
Provedor de dados: 20
Autores: Hansen, J.E.
Patagonian sprat is probably the only pelagic fish species having a considerable biomass within the Argentine Seasouth of 45ºS. There are two populations, the first inhabiting mainly the coastal region around Malvinas Islands and the other close to the coast off Santa Cruz and Tierra del Fuego Provinces, including the fuegian channels. Some results of two seasonal (autumn and spring) patagonian sprat assessment surveys carried out during 1996 are shown. The autumn cruise covered the area between 50° and 55°S, from the continental coast up to 60 m depth, whereas the spring survey extended upto 90 m depth including Le Maire Strait and part of the Beagle Channel. During both seasons, in waters ranging 6.2 - 8.8°C temperature, the species distributed very...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Length-weight relationships; Sexual maturity; Growth; Mortality; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/2530

Seychelles tuna bulletin: year 2000
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SPA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  Purse seiners PRINCIPAL POINTS:  A total catch of 330,340 Mt was reported in the Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 2000
URL: http://hdl.handle.net/1834/5168

Seychelles Fishing Authority tuna bulletin year 2003
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and from data collected via the tuna sampling programme conducted during transhipment in port Victoria. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should note that many of the figures presented here are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  PURSE SEINERS...
Tipo: Other
Palavras-chave: Purse seiners.
Ano: 2005
URL: http://hdl.handle.net/1834/5189

Tunisian mega benthos from Infra (Posidonia meadows) and circalittoral (Coralligenous) sites
Provedor de dados: 20
Autores: Ben Mustapha, K.; El Abed, A.; Komatsu, T.; Souissi, A.; Sammari, Ch.; Zarrouk, S; Hattour, A.
Several marine campaigns aiming to collect marine demosponges for specific research projects on their taxonomy and biogeography and to study the phenology and distribution of Posidonia oceanica a long the Tunisian coasts were conducted these last 10 years. They allowed a scuba diving prospecting of the infra and circalittoral zones of 555 marine stations. This field work was an occasion to describe some bottom’s associations, to highlight the general state of the main communities, specially the Posidonia and the coralligenous formations, and to draw up a list of their mega benthic species.  In general, both biota are well preserved along the Tunisian coasts. except for some black spots, mainly the one of the gulf of Gabes, where detailed analysis showed...
Tipo: Journal Contribution
Palavras-chave: Eponges; Ascidians; Coralligenous; Posidonia oceanica; Bryozoans; Benthos; Sponges.
Ano: 2002
URL: http://hdl.handle.net/1834/222

Specific diversity of the benthic macrofauna within the western coast of Tunis bay and the Djerba island coast (southwestern Mediterranean)
Provedor de dados: 20
Autores: Afli, A.; Ibin Chaabane, K.; Chakroun, R.; Jabeur, Ch.; Ramos-Espla, A.A.
In this study, 21 stations were sampled, 11 in the Djerba island coast and 10 in the western coast of Tunis bay. Then, samples were sifted on a square mesh of 1 mm a side, and the animals collected were identified and counted. Lacking an efficient single index suitable for application in all situations, several traditional nonparametric indices of biodiversity were selected, calculated and discussed. Results show that the community composition is totally different in the two studied sites, and, within each site, several species are common, butthey exchange the leader ranks from one station to another. For biodiversity measurement and since results show varying values depending on indices at several stations, an arithmetic mean index was calculated at each...
Tipo: Journal Contribution
Palavras-chave: Benthos.
Ano: 2013
URL: http://hdl.handle.net/1834/5905

Fitoplancton de un ambiente costero sometido a perturbación antrópica: Bahía Nueva, provincia de Chubut
Provedor de dados: 20
Autores: Santinelli, N.H.
One of the main antrophic contamination problems on coastal environments is associated directly with the increasing amount of nutrients carried by the rivers and by urban runoff, which can hold a great number of microbial and algae population. This problem called sea coast eutrophication, stimulates primary production and in more severe cases leads to visible algae blooms, algae foams, excessive growth of benthic algae and massive population of submerged and floating macrophytes. It has been demonstrated that cases of algae blooms and associated toxicity affecting marine biota and people often occur on euthrophic coastal areas. The main goal of this research was first to analyze the structure and dynamics of phytoplankton, pointing out those harmful...
Tipo: Theses and Dissertations
Palavras-chave: Fitoplancton; Eutroficación; Floraciones; Composición de la comunidad; Condiciones ambientales; Bioensayos; Salud pública; Zona costera Phytoplankton Eutrophication Algal blooms Community composition Environmental conditions Bioassays Public health Coastal zone Phytoplankton Eutrophication Bioassays Public health Algal blooms Environmental conditions http://aims.fao.org/aos/agrovoc/c_13344 http://aims.fao.org/aos/agrovoc/c_2734 http://aims.fao.org/aos/agrovoc/c_15731 http://aims.fao.org/aos/agrovoc/c_6349 http://aims.fao.org/aos/agrovoc/c_32367 http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2008
URL: http://hdl.handle.net/1834/3547

Marine biodiversity in Nigeria – the known and the unknown
Provedor de dados: 20
Autores: Isebor, C.
Nigeria has a coastline of 853 km, a maritime area of 46,500 km2 and an exclusive economic zone of 210,900 km2. The Nigerian coastal area is hot and humid, with an annual temperature range between 26 and 34oC, and the highest temperatures occurring during the dry season (November to March). The total annual rainfall averages between 350 and 600 centimeters. More than 80 percent of the rain falls during the rainy season (April to October) when tropical storm conditions are frequent. Rainfall is usually heavy and occasionally lasts for over 24 hours. Rainfall of about 50mm/hour between July and August are common and results in flash floods. The predominant wind is the rain bearing southwest trade wind from the Atlantic Ocean. During the short dry period, the...
Tipo: Report
Palavras-chave: Biodiversity.
Ano: 2004
URL: http://hdl.handle.net/1834/359

Probióticos como herramienta biotecnológica en el cultivo de camarón: reseña
Provedor de dados: 20
Autores: Villamil-Díaz, L.; Martínez-Silva, M.A.
Las bacterias probióticas se definen como microorganismos vivios que administrados como suplemento en la dieta pueden causar modificaciones en la microbiota asociada al tracto gastrointestinal del hospedador y generar efectos benéficos como el cincremento en la conversión alimantaria, en la resistencia a enfermedades y de la calidad del agua. Durante la última década, su aplicación en el cultivo de camarón se ha hecho frecuente ya que han rugido varios productos comerciales ideados para este fin. Al mismo tiempo, aunque hay publicados varios artículos científicos en el tema, es evidente que hace falta orientar los estudios para entender los mecanismos de acción de los probióticos, así como para establecer los protocolos de aplicación, teniendo en cuenta...
Tipo: Journal Contribution
Palavras-chave: Bacteria; Shrimp culture; Bacteria; Http://aims.fao.org/aos/agrovoc/c_765.
Ano: 2009
URL: http://hdl.handle.net/1834/3615

The ARC-test: a standardized short-term routine toxicity test with &lt;i&gt;Artemia&lt;/i&gt; nauplii: methodology and evaluation
Provedor de dados: 27
Autores: Vanhaecke, P.; Persoone, G.
Considering the need for reliable standardized routine toxicity tests for the marine environment, a short-term bioassay with &lt;i&gt;Artemia&lt;/i&gt; nauplii has been developed for routine testing. The major reason for the selection of brine shrimp as test species is the continuous availability of &lt;i&gt;Artemia&lt;/i&gt; under the form of dry cysts from which the larvae are hatched very easily. This unique advantage solves one of the major problems of aquatic ecotoxicological tests, namely stock recruitment and/or culturing; the &lt;i&gt;Artemia&lt;/i&gt; test can be performed anywhere and at any time from dry biological material available "on the shelf".An extensive study has been performed on various brine shrimp tests published in scientific...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Methodology; Nauplii; Toxicity tests; Artemia.
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3275

The meiobenthos of the North Sea: density, biomass trends and distribution of copepod communities
Provedor de dados: 27
Autores: Huys, R.; Herman, P.M.J.; Heip, C.H.R.; Soetaert, K.
During a synoptic survey carried out in April-May 1986, 171 localities were sampled in the North Sea as delimited by the Straits of Dover in the south and approximately by the 100m isobath in the north. Meiobenthos included Nematoda, Copepoda, Turbellaria, Gastrotricha, Polychaeta, Oligochaeta, Priapulida, Kinorhyncha, Ostracoda, Halacarida, Isopoda, Tanaidacea, Bryozoa, Cnidaria, Sipunculida, Echiurida, Nemertini and Tardigrada. Nematodes were the dominant group in virtually all stations, their densities ranging from 61 to 4167 individuals. 10cm&lt;sup&gt;-2&lt;/sup&gt;. Only in the Southern Bight, where nematode numbers were low, did harpacticoids sometimes represent the dominant meiobenthic taxon. There was a tendency for nematode (and total...
Tipo: Info:eu-repo/semantics/article
Ano: 1992
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7250

Animal health of ruminants: A summary of research conducted under the German Federal Programme for Organic Agriculture and other forms of Sustainable Agriculture
Provedor de dados: 21
Autores: Anon, AN.
Between 2002 and 2003, a survey established the status quo of organic dairy and beef production. A questionnaire was sent to 750 farms, supplemented by an on-site survey of 100 farms that supplied data on livestock performance, profitability, feeding, animal health and housing conditions. In a num-ber of the 74 dairy farms investigated, deficiencies regarding animal welfare were found, because recommendations for disease prevention had been implemented poorly. In the production of suckler cows only a few problems were identified; the main obstacle to further development of organic cattle rearing was considered to be the low prices paid to producers. A further study looked at what preventive measures against the major disease groups of mastitis, lameness,...
Tipo: Other
Palavras-chave: Dairy cattle; Health and welfare.
Ano: 2012
URL: http://orgprints.org/21872/1/BOEL_animal%20health%20of%20ruminants_2012.pdf

A methodological framework for analysing landscape dynamics in relation to organic farming
Provedor de dados: 21
Autores: Levin, Gregor.
Since the mid-1980’ies Danish agriculture has been subject to a growing conversion into organic farming. Today roughly 6% of the cultivated land is farmed organically. Consequently, organic farming has a growing impact on the Danish agricultural landscape.  It is generally expected that conversion to organic farming leads to landscapes with a rich and diverse nature. However, for organic farming in Denmark there exist no specific rules or guidelines concerning conservation and/or improvement of nature values at landscape scale. A positive effect of organic farming techniques on nature content within cultivated fields is relatively well documented. Yet, information about the relation between organic farming and nature values outside or surrounding...
Tipo: Conference paper, poster, etc.
Palavras-chave: Landscape and recreation.
Ano: 2003
URL: http://orgprints.org/1362/1/eco_english[2].ppt

Pupils’ Conception of Organic Foods and Healthy Eating in School. Qualitative insights from focus group interviews with 5th and 7th grade pupils in a Copenhagen elementary school
Provedor de dados: 21
Autores: Andersen, Stine; Burkal, Anna; Olsen, Malene Falster; Mikkelsen, Bent Egberg.
Adult habits, including unhealthy eating patterns, are largely established during a person´s childhood and early youth. In this connection, public schools are important health promoting platforms due to their potential for encouraging interest, knowledge and learning about health related issues. The main aim of the study was to shed light on primary and lower secondary school pupils´ everyday experience with food, nutrition, ecology and health in connection to public organic school food, using the municipality of Copenhagen as a case. We have examined how a procurement and provision strategy that primarily  originates from “backstage agents” such as engaged politicians and civil servants and governed by administrative priorities, is perceived among agents...
Tipo: Report
Palavras-chave: Consumer issues; Food systems.
Ano: 2010
URL: http://orgprints.org/17169/1/BurkalFormat03062010.pdf

Providing access, collation and analysis of Defra research for the organic sector (OF0347)
Provedor de dados: 21
The Defra organic farming research and development programme encompasses a wide range of topics undertaken by numerous research providers in over two hundred research projects, the results of which are communicated with variable effect to farmers and extension workers by various means including published papers, articles in journals and seminars. However there is no common database of all UK and other European research results offering a comprehensive and user-friendly search facility; hence, access to the results and the benefit of drawing on all available information is restricted. There is also limited analysis of the various results pertaining to individual topics or subject areas; hence, effective use of the results of organic research is restricted....
Tipo: Project description
Palavras-chave: "Organics" in general Education; Extension and communication Research communication and quality.
Ano: 2023

Soil carbon storage and yields of spring barley following grass leys of different age
Provedor de dados: 21
Autores: Christensen, B.T.; Rasmussen, J.; Eriksen, J.; Hansen, E.M.
The inclusion of leys in arable cropping is generally found to improve soil fertility. The effect of leys depends on their botanical composition and management, but the significance of individual management factors remains confounded in most studies. We quantified the effects of one- to six-year-old pure grass leys on soil C (0-20 cm) and yields of three subsequent test crops of spring barley (Hordeum vulgare) under-sown with Italian ryegrass (Lolium perenne). Each ley was a mixture of four grass species (Lolium perenne, Festuca pratensis, Phleum pratense, Poa pratensis), exposed to three to four cuts annually. Only mineral fertilizers were applied (225 kg N ha-1 yr-1). The yield of barley was tested at six rates of N fertilizer (0 to 150 kg N ha-1). The...
Tipo: Journal paper
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16289/1/16289.pdf

Organic vs. Conventional: comparison of online shopping food prices in Poland
Provedor de dados: 21
Autores: Obiedzinska, Agnieszka; Kwasek, Mariola.
Demand for organic food in Poland is increasing continuously for twenty years. This is due to positive trends resulting from an increase in consumer awareness and orientation on quality. The quality of organic food is a key source of competitive advantage in relation to food produced by conventional methods. Although the organic food market in Poland is growing, the share in the total food market is still low. Sales of organic food is done through four main channels of distribution: direct sales from producer to consumer via farm shops, sales via specialized shops, sales via conventional supermarkets and sales via online shops. The last one is developing distribution channel. In 2003 the first online grocery shop in Poland was established. Currently on the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Markets and trade.
Ano: 2014
URL: http://orgprints.org/25120/3/25120.pdf

Modelling long term carbon and radiocarbon development
Provedor de dados: 21
Autores: Petersen, B.M.; Berntsen, J.; Jensen, L.S.; Hansen, S.
In order to achieve predictive abilities for both short- and long-term simulations, SOM models should be developed on the basis of as large and diverse a data-set as possible. Many soil organic matter (SOM) models have parameters, where the criteria for estimating their values do not seem transparent, and few have been subject to a formal sensitivity analysis regarding the influence of parameter settings.  One of the major problems in most SOM models is to estimate the soil content of very slowly decomposing or perhaps even inert organic matter ("refractory" SOM).    In view of these possible limitations of present SOM models, the following model development criteria were chosen for this study: 1) use of a comprehensive data-set from both laboratory and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology.
Ano: 2003
URL: http://orgprints.org/4660/1/4660.doc

Measuring your Garden Footprint
Provedor de dados: 21
Autores: Davies, Gareth; Schmutz, Ulrich.
The work reports on a Garden Organic (working name of Henry Doubleday Research Association, Coventry UK) members experiment in 2007. Garden Organic members were surveyed with a detailed paper questionnaire to calculate an average gardening footprint of committed (self-selected) organic gardeners in the UK. This was used to develop a garden footprinting methodology and to create a benchmark of committed organic gardening in the UK. This was then compared to commerical orangic growing and to other household activities with their respective footprint and potential for improvement.    Summary findings:  (116 responses 85% reponse rate).    o The average UK food and drink ecological footprint is around 1.4 gha/ha  o About a quarter of this (25% =0.35 gha/ha) is...
Tipo: Working paper
Palavras-chave: Community development; Vegetables; Greenhouses and coverings; Fruit and berries; Environmental aspects.
Ano: 2007
URL: http://orgprints.org/18432/1/Davies_and_Schmutz_(2007)_Measuring_your_Garden_footprint_Report.pdf

Technique of pneumatic pest control
Provedor de dados: 21
Autores: Schäfer, Winfried.
Objectives: Pest control in organic production of berries, potatoes and vegetables usually employs spreading technique of registered phytopharmaceutical agents. This technique may be supported or even replaced by pneumatic pest control. Up to now there is no evaluation of pneumatic pest control available from agricultural engineering point of view. This paper concerns the following questions: Which techniques of pneumatic pest control are available and how may these techniques be improved in terms of technical and physical parameters?  Hypothesis: Analysis of pneumatic pest control techniques supports improvement of present available implements.  Method: Literature review, process analysis, and evaluation in respect of agricultural engineering parameters...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2003
URL: http://orgprints.org/880/1/Pneumatic_pest_control.PDF

Food quality: A summary of research conducted under the German Federal Programme for Organic Agriculture and other forms of Sustainable Agriculture
Provedor de dados: 21
Autores: ANON, AN.
Food quality has been a strong focus of the BÖL research programme since it started in 2001. Among other things, the policy on EU organic regulations was supported with research projects; for example regarding the discussion concerning the admission of meat curing agents (nitrite and nitrate) in 2006. In a project on this subject, consumer acceptance of cured meat products, not using these curing agents, has been described as surprisingly positive, and the practical use of alternative materials and technologies was evaluated. It was found that the implementation of new technologies to reduce the use of curing agents was mainly inhibited by their lacking acceptance in practice, technical adaptation needs and investment in product development as well as...
Tipo: Other
Palavras-chave: Food security; Food quality and human health.
Ano: 2012
URL: http://orgprints.org/21871/1/BOEL_food%20quality%20and%20processing_2012.pdf

The Development of Agri-tourism on Organic Farms in new EU countries – Poland, Estonia and Slovenia: Report of a Winston Churchill Travelling Fellowship 2006
Provedor de dados: 21
Autores: Wacher, Carolyn.
My aim of my Fellowship was to establish whether agri tourism in these countries differed from provision in the UK and whether our producers can learn from their examples of good practice. My choice of topic was influenced by a number of factors:    I have been involved in the organic agricultural sector in the UK for many years, which has resulted in a keen interest in all things organic and with a personal preference for organically produced food. Currently, I am employed with Organic Centre Wales1, funded by the Welsh Assembly Government, where we work with 700+ organic producers and processors throughout Wales.    Agri tourism together with sustainable/responsible tourism is the fastest growing sector in the European and global tourism business. In...
Tipo: Report
Palavras-chave: Landscape and recreation; Social aspects.
Ano: 2007
URL: http://orgprints.org/10860/1/winstonchurchill.pdf

Characteristics of Organic Pig Production and risk analysis concerning Toxoplasma infection
Provedor de dados: 21
Autores: Kijlstra, A.; Cornelissen, J.B.; Meerburg, B.G.
A short written questionnaire was used to study certain characteristics of the organic pig production chain in The Netherlands and the circumstances on the farm that might play a role in the transmission of Toxoplasma infection to the pigs. Of the 81 certified organic slaughter pig farmers present in the Netherlands in 2006, 52 responded to the questionnaire (64 % response).  The farms could be divided into two populations. One population was represented by small organic pig farms with a mean number of 55 slaughtered pigs per year. These farms covered 40% of the total number of investigated farms, but only represented 2.5 % of the total number of slaughtered pigs. The second population had a mean annual production of 1460 animals. Almost 95% of these...
Tipo: Conference paper, poster, etc.
Palavras-chave: Pigs.
Ano: 2007
URL: http://orgprints.org/10137/1/kijlstra%2Detal%2D2007%2Dtaxoplasma_pig%2Dproduction.pdf

Plant protection in organic arable and horticultural production: A summary of research conducted under the German Federal Programme for Organic Agriculture and other forms of Sustainable Agriculture
Provedor de dados: 21
Autores: ANON, AN.
Plant protection in arable and horticultural production was one of the central topics for research in the Federal Programme for Organic Agriculture. Since 2002, 53 projects have been carried out on this subject. After several status quo analyses (2002-2004), methods for control and prevention of pests and diseases were further developed and adapted to organic farming conditions. Focus areas included copper replacement, resistant varieties and improved cultivation methods. Plant health issues were also addressed in various speciality crops where pests and diseases often lead to the need to import produce from other European countries (e.g. Brussels sprouts), as domestic production cannot cover the ever-increasing demand; in this area, several projects were...
Tipo: Other
Palavras-chave: Crop health; Quality; Protection.
Ano: 2012
URL: http://orgprints.org/21869/1/BOLE_plant%20protection%20in%20organic%20arable%20and%20horticultural%20production_2012.pdf

Report from an EWRS workshop on modelling weed population dynamics
Provedor de dados: 21
Autores: Rasmussen, I.A.; Bastiaans, L.; Holst, N.; Grundy, A.; Melander, B.
A three-day workshop on modelling weed population dynamics partially sponsored by the European Weed Research Society (EWRS) was held in October 2006 at Research Centre Flakkebjerg. 24 participants attended the workshop from 8 countries, mainly Europe and USA. The aim of the workshop was to gather some of those active and interested in the field, i.e. most of the participants had either published papers on weed population dynamic models or had a model under development. By gathering these people, it was our hope to learn from each other and possibly benefit by increasing the knowledge and use of each other's work. The EWRS saw the workshop as an opportunity to interconnect some of the work going on in (at least) three working groups: Weed Seed Germination...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2007
URL: http://orgprints.org/11347/1/Ilse_Rasmussen%2D06%2D02.doc

“Please Pick Me” - How Incredible Edible Todmorden is repurposing the commons for open source food and agrobiodiversity
Provedor de dados: 21
Autores: Paull, John.
The remarkable project that is Incredible Edible Todmorden (IET) raises the question of food self-sufficiency for Todmorden - and by extension, for the rest of Britain. In March 2008 a public meeting was held in Todmorden, an English village in West Yorkshire (north west England). The topic was food - and the premise was “we need to talk”. That meeting attracted about sixty attendees, it was a local response to the growing awareness that Britain needs to have a conversation about food. It was a meeting against the tide of the Americanisation of the British diet with fizz and fat, of the Tescoisation of food retailing, of the dissociation of food from its agricultural and geographic provenance, as well as of a centuries-late response to the offshoring of...
Tipo: Book chapter
Palavras-chave: Social aspects Networks and ownership Consumer issues Education; Extension and communication.
Ano: 2013
URL: http://orgprints.org/24956/28/24956.pdf

Overview of Development of Organic Food and Farming in the CEE: Elements for a Regional Action Plan
Provedor de dados: 21
Autores: Znaor, Darko.
The economic transition of the Central and Eastern Europe (CEE) resulted in rather drastic changes of the agricultural sector. Food production and food consumption in CEE have declined considerably since 1989. The high prices of agri-chemicals and low prices of agricultural produce forced farmers to reduce agricultural inputs or refrain from using them altogether. This resulted in a drop of fertilisers and pesticides use by more than 50% in comparison with 1990. However, this shift was not the result of a designed agri-environmental policy, but rather the consequence of an evolution from state economy to market economy.  The current low-input farming as practised in the CEE is not necessarily environmentally friendly. The reduction of agri-chemical inputs...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Markets and trade; Consumer issues; Policy environments and social economy; Knowledge management; Regulation.
Ano: 2001
URL: http://orgprints.org/26429/7/26429.pdf

Organic and healthy – two goals in one go. A comparative analysis study among public primary schools in Denmark and Germany.
Provedor de dados: 21
Autores: Mikkelsen, Bent Egberg; He, Chen.
There is a growing health concern over obese and overweight children. Schools are a well suited setting for children for learning and adopting sound life skills. Using schools in healthy eating strategies may play an important role in preventing children from becoming obese and overweight. As a result a growing number of schools and municipalities engage in initiatives that promote healthy foods and eating. Some of these initiatives however are not focused only on healthy eating alone, but involve objectives to promote more sustainable consumption through developing organic supply chains for school food services. The question therefore arises whether these two change objectives and drivers interact. This paper investigates the interrelation between the two...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Policy environments and social economy.
Ano: 2010
URL: http://orgprints.org/16802/1/BiofachChenBent2010_.pptx

Ecological-economic impact assessment of Swiss Direct Payments on sector level: A quantitative approach for the evaluation of the cost-effectiveness of policy measures
Provedor de dados: 21
Autores: Schader, Christian.
The request for quantitative tools for ecological-economic impact assessment of agricultural policies has increased in recent years, due to i) improved impact assessment and policy evaluation standards of the new agricultural support schemes (European Commission, 2004) and ii) the improved methodological and technical potentials in the field of sector modelling (Heckelei, 2002).  Switzerland, as a non-EU member, has introduced cross-compliance rules already in 1998 and linked a bulk of further ecological direct payments to specific farm management restrictions. While the whole direct payment system has been subject to an official evaluation process (Flury, 2005), especially the question for the cost-effectiveness of extensification policies has not been...
Tipo: Conference paper, poster, etc.
Palavras-chave: Policy environments and social economy; Markets and trade; Farm economics.
Ano: 2007
URL: http://orgprints.org/13385/1/schader%2D2007%2DFull_paper_Workshop_Rennes.pdf

Modelling Long Term Soil Carbon and Radiocarbon Dynamics with CN-SIM
Provedor de dados: 21
Autores: Petersen, B.M.; Berntsen, J.
In order to achieve predictive abilities for both short- and long-term simulations, soil organic matter (SOM) models should be developed on the basis of as large and diverse a data-set as possible.    Many SOM models have parameters, where the criteria for estimating their values are not transparent, and few models have been subject to a formal sensitivity analysis regarding the influence of parameter settings. One of the major problems in most SOM models is to estimate the soil content of very slowly decomposing or perhaps even inert organic matter ("refractory" SOM).     There is presently a lack of experimental methods to verify the partitioning of SOM into conceptual compartments or pools, and to determine the turnover rate and other characteristics...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology.
Ano: 2004
URL: http://orgprints.org/4656/1/Poster_florida.doc

Physical, chemical and mechanical properties of Australian cedar wood cultivated in Corupá, Santa Catarina State, Brazil
Provedor de dados: 190
Autores: Trianoski, Rosilani; Matos, Jorge Luis Monteiro de; Iwakiri, Setsuo.
The Australian cedar (Toona ciliata M. Roem) is a species of high commercial value, with characteristics similar to native mahogany and cedar, which has been highlighted in forest plantations in Brazil, whose wood should be the subject of technological research. The objective of this study was to evaluate the physical, chemical and mechanical properties from planted stands of 18 years old. The wood showed low density (0.330 g cm3), low average dimensional stability (anisotropy: 2.22), high content of extractives (10.33%) and moderate mechanical properties: MOR and MOE to bending: 498 kgf cm-2 and 66,163 kgf cm-2; MOR and MOE for parallel compression: 258 kgf cm-2 and 100.813 kgf cm-2; shear: 82 kgf cm-2 and medium hardness: 208 kgf.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exotic species; Resistance; Dimensional stability; Extractives; Toona ciliata Tecnologia e utilização de Produtos Florestais - Propriedades da madeira Espécie exótica; Resistência; Estabilidade dimensional; Extrativos; Toona ciliata.
Ano: 2014
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/523

Auswirkungen und alternative Ausgestaltung der Modulation von Direktzahlungen
Provedor de dados: 31
Autores: Kleinhanss,   Werner.
The system of direct payments in the European Union’s Common Agricultural Policy (CAP) is being criticised with respect to the level, unequal distribution and allocation effects on production. Besides the decoupling of direct payments a modulation and a partial transmission to the second pillar of CAP are proposed. Modulation on a voluntary basis was already introduced in Agenda 2000. In its Mid-term Review of the Agenda the Commission proposes an obligatory dynamic modulation scheme including the capping of direct payments beyond a threshold of 300 000 €. Possible impacts of the Commission's proposal are assessed with simulations based on farm accounting data of EU-FADN. Distribution effects between farm sizes and member states are unveiled. Alternate...
Tipo: Journal Article
Palavras-chave: Midterm-review; Modulation; Farm accounting data network; Direct payments; Agricultural and Food Policy.
Ano: 2002
URL: http://purl.umn.edu/98269

A Scientific Review of the Impact of UK Ruminant Livestock on Greenhouse Gas Emissions
Provedor de dados: 31
Autores: Hopkins,   Alan; Lobley,   Matt.
Climate change is a subject of global environmental concern. The UK has seen a progressive strengthening of political resolve to address the problems associated with emissions of greenhouse gases (GHGs), principally carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). Although agriculture globally, and ruminant livestock production in particular, is a net contributor to GHG emissions, generalizations about impacts on climate change often fail to distinguish between different systems of production, advances in technology, and the role of extensive grazing lands in contributing to ecological services and food production in situations where other forms of farming are impractical. Against this background, the overall aim of this review was therefore to...
Tipo: Report
Palavras-chave: Climate Change; Ruminant Livestock; Greenhouse Gases; UK; Agricultural and Food Policy; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/61030

Valuation of Externalities in Water, Forests and Environment for Sustainable Development
Provedor de dados: 31
Autores: Varghese,   Shalet K.; Manjunatha,   A.V.; Poornima,   K.N.; Akarsha,   B.M.; Rashmi,   N.; Tejaswi,   Pillenahalli Basavarajappa; Saikumar,   B.C.; Jeevarani,   A.K.; Accavva,   M.S.; Amjath Babu,   T.S.; Suneetha,   M.S.; Unnikrishnan,   P.M.; Deshpande,   R.S.; Nagaraj,   N.; Chandrashekar,   H.; Mahadev,   G. Bhat; Chengappa,   P.G.; Mundinamani,   S.M.; Shanmugam,   T.R.; Chandrakanth,   Mysore G.
Conceptual development in the theory of externalities have opened up several policy options for their internalization including payment towards environmental services. Hence as externalities are social costs, accountability is crucial in increasing environmental awareness and for collective action through education and extension more so in developing countries. Here a modest attempt has been made to estimate externalities in water, forests and environment with field data from peninsular India to reflect on the economic perception of externalities by farmers and users of environment for the consideration of policy makers to devise institutions for payment towards environmental services. The methodology largely used here in estimation / valuation of...
Tipo: Conference Paper or Presentation
Palavras-chave: Externalities; Environmental services; Sustainable development; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44413

INTERNAL CONSISTENCY IN MODELS OF OPTIMAL RESOURCE USE UNDER UNCERTAINTY
Provedor de dados: 31
Autores: Plantinga,   Andrew J.; Provencher,   Bill.
For several decades, economists have been concerned with the problem of optimal resource use under uncertainty.  In many studies, researchers assume that prices evolve according to an exogenous stochastic process and solve the corresponding dynamic optimization problem to yield an optimal decision rule for exploitation of the resource.  This study is motivated by our attempt to understand the relationship between efficiency in resource markets and optimal harvest decisions in which price is an exogenous state variable.  The literature on optimal commodity storage finds that in a rational expectations equilibrium commodity prices are stationary and serially correlated.  Yet recent papers on optimal timber harvesting that assume exogenous stationary prices...
Tipo: Conference Paper or Presentation
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/20712

INSTITUIÇÕES AMBIENTAIS E DESMATAMENTO NA AMAZÔNIA LEGAL BRASILEIRA: UMA ANÁLISE EXPLORATÓRIA EM NÍVEL DE MUNICÍPIO
Provedor de dados: 31
Autores: Araujo,   Paulo Thadeu M.; Melo,   Andrea S.S.A.
A discussão apresentada nesse trabalho constitui-se parte de um estudo que tenta entender o desmatamento da Amazônia Legal brasileira dentro de uma perspectiva institucional. Para isto, analisa a estrutura institucional ambiental dos municípios desta região, buscando identificar se diferenças nos arranjos institucionais destes municípios podem ter levado a distintas taxas de desmatamento durante o processo de crescimento econômico dos mesmos. O crescimento econômico da região tem se baseado fortemente na expansão da pecuária de corte e do cultivo da soja, atividades estas identificadas na literatura como principais responsáveis pelas taxas de desmatamento observadas. A análise da perspectiva institucional, através de informações referentes a instituições...
Tipo: Conference Paper or Presentation
Palavras-chave: Amazônia legal brasileira; Municípios; Arranjos institucionais; Desmatamento; Brazilian Amazon legal; Municipalities; Institutional arrangements; Deforestation; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/113384

A COMPARISON OF MINNESOTA'S FARM BUSINESS MANAGEMENT ASSOCIATION MEMBERS AND THE USDA'S FARM COSTS AND RETURNS SURVEY
Provedor de dados: 31
Autores: Andersson,   Hans; Olson,   Kent D.
Many states have farm record associations which collect individual farm data. This data are used for research, extension, and teaching purposes. However, since membership in the associations is voluntary, the question arises whether the members are representative of the population of all farmers in that area. This study compares farm record data collected through the Southeastern and Southwestern Minnesota Farm Business Management Associations (FBMA) and data obtained through the USDA's Farm Costs and Returns Survey (FCRS). Both data sets were for 1987. By design, the FCRS survey is not subject to the self-selection bias that may occur in the FBMA data. The objectives of this study are to: (1) determine which farm characteristics are statistically the same...
Tipo: Working or Discussion Paper
Palavras-chave: Farm Management.
Ano: 1992
URL: http://purl.umn.edu/13084

The Lifecycle Carbon Footprint, Bioenergy and Leakage: Empirical Investigations
Provedor de dados: 31
Autores: McCarl,   Bruce A.
Agriculture may help mitigate climate change risks by reducing net greenhouse gas (GHG) emissions (McCarl and Schneider, 2000). One way of doing this is that agriculture may provide substitute products that can replace fossil fuel intensive products or production processes. One such possibility involves providing feedstocks for conversion into consumable forms of energy, where the feedstocks are agriculturally produced products, crop residues, wastes, or processing byproducts. Such items may be used to generate bioenergy encompassing the possibilities where feedstocks are used: • to fuel electrical power plants; • as inputs into processes making liquid transportation fuels e.g., ethanol or biodiesel. Employing agriculturally produced products in such a way...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/49100

BIOLOGISCHE, BIOTECHNOLOGISCHE EN GANGBARE LANDBOUW: EEN VERGELIJKENDE ECONOMISCHE STUDIE
Provedor de dados: 31
Autores: Demont,   Matty; Tollens,   Eric.
Crop protection is a part of the agricultural production system. In Europe during the past century, this system has been subject to innovation, stemming from the second agricultural revolution of the Modern Time. Today we are on the crossroad of three alternative agricultural systems. Conventional agriculture is the product of the second agricultural revolution. So far, biotechnological agriculture seems to continue these trends. Organic agriculture on the other hand is a reaction on the paradigm of the second agricultural revolution, especially regarding the negative environmental externalities engendered by this revolution. Today, conventional agriculture is under pressure. Two alternatives have emerged: organic and biotechnological agriculture. Which...
Tipo: Working or Discussion Paper
Palavras-chave: Production Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/31839

A General Conceptual Approach to Modeling the Livestock Sector: Application to the Japanese Swine-Pork Sector Model with Analysis of the "No Gate Price Policy Scenario"
Provedor de dados: 31
Autores: Fabiosa,   Jacinto F.
This study develops a generic conceptual approach to modeling the livestock sector that provides better coverage of variables to ensure the consistency in the underlying biologics of the model and also provides consistent rules of specification. This approach is applied to modeling the swine-pork sector of Japan and then used to analyze the impact of removing Japan's gate price policy and variable levy for pork imports. The new approach departs significantly from existing models. For consistency in the biologics of the model both live animals and meat components of the sector are fully covered.  The structure clearly differentiates stock and flow variables and investment and production decisions. A standard rule of specification is established that only...
Tipo: Working or Discussion Paper
Palavras-chave: Livestock sector; Partial equilibrium model; Gate price policy; Livestock Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/18655

PESQUISA EM ÍNDICE DE PREÇOS: ANTECEDENTES HISTÓRICOS E PRINCIPAIS ABORDAGENS
Provedor de dados: 31
Autores: Machado,   Andre Grossi; Figueiredo,   Reginaldo Santana.
O presente trabalho objetiva revisar os antecedentes históricos da pesquisa de uma das ferramentas mais utilizadas e divulgadas em estudos econômicos em todo o mundo e de grande atratividade e aplicação no agronegócio: os índices de preços. Observa-se que o volume de trabalhos, discussões e estudos no decorrer do tempo, além de ilustrar a importância do assunto, permitiu o constante melhoramento dos métodos de cálculo e a defesa de diferentes pontos de vistas, levando inclusive à divisão de seu corpo teórico em algumas principais linhas ou correntes de pesquisa. A história da pesquisa tem seus primeiros registros no início do século XVIII, desenvolve-se sob vários enfoques e se enriquece ainda mais a partir do século XX. Esses enfoques gradualmente...
Tipo: Conference Paper or Presentation
Palavras-chave: Índice de preços; Abordagem estatística; Abordagem axiomática; Abordagem econômica; Price indexes; Statistical approach; Axiomatic approach; Economical approach; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/109726

Cultural Diversity: A Glimpse Over the Current Debate in Sweden
Provedor de dados: 31
Autores: Hamde,   Kiflemariam.
A year and a half ago, the Swedish government decided 2006 to be The Year for Cultural Diversity (Agenda för Mångkultur, 2005). The general purpose, according to the directive, is to facilitate the possibilities for all citizens to participate in all aspects of the cultural life by enhancing appropriate arenas for different traditions (Agenda för Mångkultur, 2005). This policy decision was not a surprise to both observers and participants of the diversity debate. There has been a growing interest in the virtues of diversity for business effectiveness and success (mångfald.com), heightened scrutiny of institutional and organizational life by the mass media, and legitimizing debates by political parties which had always had some form of concern for...
Tipo: Working or Discussion Paper
Palavras-chave: Labor and Human Capital.
Ano: 2006
URL: http://purl.umn.edu/12101

EXPLAINING THE ADOPTION AND DISADOPTION OF SUSTAINABLE AGRICULTURE: THE CASE OF COVER CROPS IN NORTHERN HONDURAS
Provedor de dados: 31
Autores: Neill,   Sean P.; Lee,   David R.
Although technology adoption has been the subject of a great deal of economic research, that focused on the economics of adoption of low-input "sustainable" systems has been much more limited and recent. This paper attempts to explain the recent decline in the use of cover crops using in maize farming in the Department of Atlantida, Honduras. In the early 1970's, farmers in the region began rotating maize with the velvetbean (mucuna ssp.), a system learned from Guatemalan immigrants. Tohe mucuna-maize system decreased the labor required for maize farming even as it increased yields, prevented erosion, and conferred a variety of other agronomic benefits. By 1992, estimates show that the system had diffused among more than 60% of farmers in the Department....
Tipo: Working or Discussion Paper
Palavras-chave: International development; Sustainable agriculture; Adoption; Disadoption; Farmer management; Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/14756

AVALIAÇÃO DE IMPACTOS SOBRE O CONHECIMENTO, CAPACITAÇÃO E POLÍTICO-INSTITUCIONAL DA PESQUISA GERADA PELA EMBRAPA
Provedor de dados: 31
Autores: Vedovoto,   Graciela Luzia; Marques,   Daniela Vieira; Avila,   Antonio Flavio Dias; Souza,   Mirian Oliveira De; Ribeiro,   Luis Fernando Martins.
Este trabalho apresenta a experiência da Empresa Brasileira de Pesquisa Agropecuária - Embrapa na avaliação de impactos sobre o conhecimento, capacitação e político-institucional. O trabalho descreve a metodologia utilizada tomando como referência uma revisão bibliográfica sobre o tema e análisa documentos institucionais recentes e relatórios de avaliação disponibilizados pelas Unidades Descentralizadas da Embrapa. A metodologia utilizada para avaliação de impactos desta natureza é baseada na dimensão “capacitação” do método ESAC, criado pelo GEOPI/Unicamp. A Embrapa tem direcionado esforços no sentido de aprimorar a metodologia  de avaliação de impactos sobre o conhecimento, capacitação e polítíco-institucional por considerar que os benefícios gerados...
Tipo: Conference Paper or Presentation
Palavras-chave: Metodologia; Avaliação de impactos; Conhecimento; Methodology; Evaluation of impacts; Knowledge; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/109975

SANEAMENTO BÁSICO: UM ESTUDO PARA COMUNIDADES DE PEQUENO PORTE
Provedor de dados: 31
Autores: Zapparoli,   Irene Domenes.
A degradação hídrica ambiental das cidades ribeirinhas, principalmente em comunidades de pequeno porte, está relacionada entre outras causas ao intenso turismo e a falta de sistema de coleta, remoção e tratamento de esgoto. Com uma poluição quase imperceptível e com carência de políticas ambientais a poluição acontece de forma lenta, aliada a urbanização rápida e de forma irracional. Este artigo tem como objetivo identificar os fundamentos teóricos do saneamento básico e analisar a sua concepção na política de preservação ambiental de com unidade de pequeno porte, com vistas à melhoria de qualidade de vida da população. O método consiste em revisão bibliográfica e pesquisa documental sobre saneamento básico. Para análise a pesquisa foi realizada com...
Tipo: Conference Paper or Presentation
Palavras-chave: Aneamento; Comunidades; Recursos hídricos; Basic sanitation; Small size communities; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/108592

VALUATION OF EXTERNALITIES IN WATER, FORESTS AND ENVIRONMENT FOR SUSTAINABLE DEVELOPMENT
Provedor de dados: 31
Autores: Verghese,   Shalet K.; Manjunatha,   A.V.; Poornima,   K.N.; Akarsha,   B.M.; Rashmi,   N.; Tejaswi,   Pillenahalli Basavarajappa; Saikumar,   B.C.; Jeevarani,   A.K.; Accavva,   M.S.; Amjath Babu,   T.S.; Suneetha,   M.S.; Unnikrishnan,   P.M.; Deshpande,   R.S.; Nagaraj,   N.; Chandrashekar,   H.; Bhat,   Mahadev G.; Chengappa,   P.G.; Mundinamani,   S.M.; Shanmugam,   T.R.; Chandrakanth,   Mysore G.
Paper presented at EAAE 2008 Congress
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Externalities; Environmental services; Sustainable development.
Ano: 2008
URL: http://purl.umn.edu/43617

Perturbaciones provocadas por la nueva PAC en las decisiones de ajuste estrategico en sistemas agrarios andaluces
Provedor de dados: 31
Autores: Gallardo,   Rosa Karina; Ramos,   Fernando; Ramos,   Eduardo.
RESUMEN: Las sucesivas reformas de la Política Agraria Común (PAC) han diseñado distintos instrumentos de protección para los productos continentales y para los productos mediterráneos en Europa, lo que ha originado diferentes estrategias de ajuste por parte de los agricultores frente a estos procesos. Los empresarios agrarios de zonas donde conviven ambos tipos de productos (continentales y mediterráneos), se ven sometidos a medidas de protección que pueden derivar hacia  lógicas económicas contradictorias y constituir  un obstáculo para los procesos de ajuste y modernización que se pretenden fomentar desde la UE. Este artículo aborda el estudio de los efectos de las reformas de la PAC en sistemas agrarios andaluces con presencia de producciones...
Tipo: Journal Article
Palavras-chave: Common Agriculture Policy (CAP). Competitiveness; Agricultural Systems; Farming adjustment strategies; Agricultural and Food Policy; Q18.
Ano: 2002
URL: http://purl.umn.edu/28752

PRODUÇÃO E COMERCIALIZAÇÃO: SUBSÍDIOS PARA A CONSTRUÇÃO DE UM PROGRAMA DE APOIO À FEIRA LIVRE DO MUNICÍPIO DE SÃO FRANCISCO, MG
Provedor de dados: 31
Autores: Silvestre,   Luiz Henrique Aparecido; Ribeiro,   Eduardo Magalhaes; Freitas,   Camila Silva.
As feiras livres municipais do semi-árido de Minas Gerais representam um mercado no qual os custos de entrada para a produção local são reduzidos ou praticamente inexistentes, delas participam vários produtores que ao mesmo tempo são vendedores e, por estarem intimamente ligadas à dinâmica de abastecimento e consumo, são mecanismos que promovem a inserção de parcela da população rural e urbana nos circuitos de trocas. Frente à possibilidade de representar um lócus para a implementação de políticas de desenvolvimento, o objetivo deste trabalho é caracterizar a feira livre do município de São Francisco, norte de Minas Gerais, investigando o perfil da oferta de produtos, dos consumidores, dos feirantes e gerar subsídios para a construção de uma política de...
Tipo: Conference Paper or Presentation
Palavras-chave: Produção; Comercialização; Agricultura familiar; São Francisco; Production; Local market; Family farmers; Marketing.
Ano: 2008
URL: http://purl.umn.edu/109674

ASSESSING DOMESTIC SUPPORT PROVISIONS OF THE 2003 DRAFT TEXTS IN WTO AGRICULTURE NEGOTIATIONS
Provedor de dados: 31
Autores: Brink,   Lars.
The Doha Development Round of trade negotiations in the WTO aims to achieve substantial reductions in trade-distorting domestic support. The Harbinson draft modalities were tabled in March 2003, followed by less detailed draft framework texts for modalities before and during the Cancún meeting in September 2003. The framework texts introduce new provisions not present in the Harbinson modalities or in earlier proposals, modify some provisions and eliminate others. The Harbinson modalities and the five 2003 framework texts (EC-US, del Castillo, G-21, Derbez, and G-21) show differences and similarities and show how certain provisions evolved over time in, e.g., the green box, the blue and revised blue box, deminimis, AMS and Total AMS commitments, and the...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; International Relations/Trade.
Ano: 2004
URL: http://purl.umn.edu/14609

INTER-COUNTY DIFFERENCES IN COST OF COMPLAINCE WITH MICHIGAN'S SOLID WASTE MANAGEMENT ACT
Provedor de dados: 31
Autores: Kaston,   Julie Ann.
Waste generation is a natural and expected outcome of productive activity.  Waste is produced, much like any other commodity, although rather than considering waster as a "good" where more is preferred to less, we would tend to consider waste as a 'bad' - less is preferred to more.  However, it is also true that waste supply is an increasing function of production and that is we prefer more consumption to less, we must accept the production of more waste.  The point here is that waste disposal is a cost which in aggregate increases with the demand for productive activity;  it is a cost which is assigned to both producers and consumers in the form of a trash removal fee.  However, as a cost of production, one would expect that disposal fees are passed on to...
Tipo: Thesis or Dissertation
Palavras-chave: Environmental Economics and Policy.
Ano: 1981
URL: http://purl.umn.edu/11106

Aspekte des Gewässerschutzes und der Gewässernutzung beim Anbau von Energiepflanzen - Ergebnisse eines Forschungsvorhabens im Auftrag des Umweltbundesamtes
Provedor de dados: 31
Autores: Nitsch,   Heike; Osterburg,   Bernhard; Buttlar,   Christine von; Buttlar,   Hans-Bernhard von.
Zusammenfassung: Der vorliegende Arbeitsbericht entstand im Rahmen eines Forschungsvorhabens im Auftrag des Umweltbundesamtes und beleuchtet mit dem Thema „Gewässerschutz und Energiepflanzen“ einen Aspekt, der bisher nicht im Fokus der Diskussionen um den Energiepflanzenanbau stand. In dieser Studie wurden relevante Verwertungsketten für die energetische Nutzung von landwirtschaftlicher Biomasse in Deutschland anhand potenzieller Auswirkungen auf die Gewässer bewertet. Mögliche negative Wirkungen auf die Gewässer sind häufig auch aus Klimaschutzgründen relevant. Vorgestellt werden zudem Möglichkeiten des gewässerschonenden Anbaus. Die Analyse stützt sich auf die Auswertung von Literatur sowie schriftlicher und telefonischer Befragungen verschiedener...
Tipo: Report
Palavras-chave: Energiepflanzen; Gewässerschutz; Biogasanlagen; Landnutzung; Steuerungsinstrumente; Energy crops; Water protection; Biogas plants; Regulation instruments; Land use; Crop Production/Industries; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy; K32; Q18; Q24; Q25; Q42.
Ano: 2008
URL: http://purl.umn.edu/103662

Optimal Voluntary "Green" Payment Programs To Limit Nitrate Contamination Under Price and Yield Risk
Provedor de dados: 31
Autores: Peterson,   Jeffrey M.; Boisvert,   Richard N.
A model of a voluntary "green" payment program is developed to control nitrate leaching and runoff from corn production in New York. The program achieves environmental goals through self-interested choices of farmers, grouped by the productive and environmental characteristics of soils. It considers randomness in prict}~, production, and environmental damage. Farmers are assumed to maximize expected utility subject to chance constraints on severe levels of nitrate contamination. This program compensates farmers for applying environmentally safe levels of nitrogen fertilizer. If information is symmetric, program participation conditions require that the post-policy expected utility is at least as large as pre-policy expected utility. Under asymmetric...
Tipo: Working Paper
Palavras-chave: Environmental Economics and Policy; Risk and Uncertainty.
Ano: 1998
URL: http://purl.umn.edu/122687

NONTARIFF AGRICULTURAL TRADE BARRIERS REVISITED
Provedor de dados: 31
Autores: Hillman,   Jimmye S.
Terminological, as well as substantive, problems with other-than-customs-duty trade protection issues have existed for a long time. After World War II, these problems proved troublesome for trade analysts. Baldwin [1970], Denton and O'Cleiracain [1972], and Lloyd [1973] were among the first who helped clarify language and ideas. Unlike many at that time, I chose to stick with  "nontariff barriers"  as a generic shorthand to describe a world of government measures, other than tariffs or customs taxes, which restrict or distort international commerce between domestic and imported goods and services. Viewed in this simple fashion, nontariff barriers [NTBs] came to mean the totality of instruments, other than customs duties, which restrict international trade....
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade.
Ano: 1996
URL: http://purl.umn.edu/14602

COMPONENTES NO CONTEXTO DO AGRONEGÓCIO CAFÉ EM RONDÔNIA: ABORDAGEM DAS CARACTERÍSTICAS BÁSICAS
Provedor de dados: 31
Autores: Souza Filho,   Theophilo Alves; Ferreira,   Degson; Aguiar,   Iracy Soares; Oliveira,   Marcelo Batista; Souza,   Dercio Bernardes de.
Este artigo analisa o sistema agroindustrial (SAG) do café em Rondônia como um relevante segmento que gera emprego e renda, riqueza e divisas para o Estado e para os diversos setores da atividade econômica e, que contribui de forma efetiva para o desenvolvimento sócio-econômico local. Examinam-se as principais características relacionadas desde a participação efetiva de instituições de assistência técnica e científica na orientação e apoio ao desenvolvimento do setor cafeeiro até a abordagem de algumas alternativas para o seu cultivo e manejo que, representam oportunidades no agronegócio café, com o fito de analisar e destacar a sua importância para o desenvolvimento sócio-econômico do Estado. Para isso, utiliza-se de uma pesquisa exploratória baseada na...
Tipo: Conference Paper or Presentation
Palavras-chave: Agronegócio; Café; Assistência Técnica; Comercialização; Rondônia; Agribusiness; Coffee; Service; Trading; Rondônia; Agribusiness; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/109671

BIOENERGIA: POTENCIAIS, PROBLEMAS E DECISÕES PARA A VIABILIZAÇÃO SOCIAL E ECONÔMICA
Provedor de dados: 31
Autores: Vian,   Carlos Eduardo de Freitas; Moraes,   Gustavo Inacio De.
A demanda por biocombustíveis está crescendo no mundo todo por conta da preocupação como aquecimento global. Este processo oferece oportunidades para regiões ainda pouco desenvolvidas e para uma parcela de mão-de-obra não qualificada. Por outro lado é uma fonte com densidade energética alta, modifica substancialmente as externalidades negativas produzidas na atual oferta de energia, diminuindo o nível de emissão de gases. Mas por outro lado, existe o potencial de poluição a partir da produção deste novos produtos. Mas a produção de bio-combustíveis tem sido apontada como uma ameaça à produção de alimentos, na medida em que competirá por terras. Adicionalmente, percebem-se limitações na infra-estrutura de distribuição e na garantia de um fornecimento livre...
Tipo: Conference Paper or Presentation
Palavras-chave: Bio-Combustíveis; Desenvolvimento Sustentável; Tecnologia; BioFuels; Sustanaible Development; Technology; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/114128

Market Access in Western Canadian and Northwestern United States Table Potato Markets
Provedor de dados: 31
Autores: Dunlevy,   Kevin J.; Lerohl,   Mel L.
This report examines market opportunities in British Columbia for Alberta produced table potatoes. The report also seeks (1) to assess the cost competitiveness of the Alberta table potato sector, compared with costs of potato production in British Columbia and the Pacific Northwest (PNW) of the United States (US); (2) to provide a preliminary understanding of potential trade flows and trading volumes based on relative cost competitiveness; and (3) to assess the importance of particular potato attributes to table potato buyers in British Columbia. The study also undertakes a description of the environment in which trade takes place between Alberta and British Columbia. This is done to document conditions under which inter-province trade takes place, and to...
Tipo: Working or Discussion Paper
Palavras-chave: Marketing; International Relations/Trade.
Ano: 1998
URL: http://purl.umn.edu/24041

FINANCIAMENTO E GERENCIAMENTO DE CAPITAL DE GIRO EM EMPRESAS DE FRUTICULTURA IRRIGADA: UM ESTUDO DE CASO NO VALE DO SÃO FRANCISCO
Provedor de dados: 31
Autores: Oliveira,   Abdinardo Moreira Barreto De; Rigo,   Ariadne Scalfoni; Carvalho,   Daniela Moreira de.
O objetivo deste estudo foi analisar a formação e a gestão do capital de giro em empresas de fruticultura irrigada localizadas no Vale do Rio São Francisco. A justificativa para esta investigação em empresas de agronegócio se dá pela expressiva participação do setor nos indicadores macroeconômicos brasileiros, e pelas dificuldades recentemente apresentadas em relação ao financiamento da produção agrícola. A tipologia da pesquisa foi descritiva, e a estratégia empreendida foi o estudo de dois casos de empresas produtoras e exportadoras da região. A amostra da pesquisa foi composta por 36 relatórios contábeis mensais por empresa, no período entre 2004 e 2006. A coleta de dados utilizada foi análise documental, e a interpretação dos resultados se deu através...
Tipo: Conference Paper or Presentation
Palavras-chave: Gestão Financeira; Capital de Giro; Fruticultura Irrigada; Finance Management; Working Capital; Irrigated Orchard; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/109528

Az élelmiszer-gazdasági marketing helyzete és lehetőségei Magyarországon
Provedor de dados: 31
Autores: Gaal,   Bela.
A múlt áttekintése, a jelen értékelése és a jövő körvonalai ismét megerősítik azt a megállapítást – amely a rendszerváltás idején is megfogalmazódott –, hogy azok a környezeti (éghajlat, víz, hőmérséklet), történeti, tradicionális (évszázados szakmakultúra), technológiai (új, korszerű rendszerek) előnyök, amelyek a magyar élelmiszer-gazdaság nemzetközi előnyeit alapozták, pillanatok alatt köddé válnak, eltűnnek a nem megfelelő piaci munka, marketingtevékenység hiányosságai miatt. Ezért a jövő élelmiszer-gazdaságának kulcsszerepű eleme a tudatos és szisztematikus marketingstratégia-építés és a közösségi marketingtevékenység állami gondolkodásba történő beépítése. Ez egyben a CAP (Common Agricultural Policy) mellett a nemzeti agrárstratégia építését is...
Tipo: Journal Article
Palavras-chave: Gazdasági válság; Szektoriális marketing; Új értékrend; Tennivalók; Economic crisis; Sector-specific marketing; New values; Tasks; Agribusiness; Marketing.
Ano: 2010
URL: http://purl.umn.edu/99182

ASSET ILLIQUIDITY, EXCLUSORY LAWS, AND LAND REFORM: THE CASE OF FOREIGN OWNERSHIIP OF HUNGARIAN AGRICULTURAL LAND
Provedor de dados: 31
Autores: Coakley,   Jaime; Gow,   Hamish R.
The ownership of agricultural land by foreign nationals is currently an extremely sensitive political issue in many of the Central and Eastern European (CEE) countries as they move towards European Union accession.  During the past decade economic reforms in CEE have resulted in substantial welfare declines within agricultural sectors across the region.  Generally, all agents within the agri-food chain have faced similar problems of decreasing terms of trade, increased competition, lack of financial resources and thin markets for both the sale of their output as well as for the sale of their underlying assets if so inclined (Swinnen and Macours, 2000).  As a result, farmers have found themselves in severe financial distress and forced to operate at...
Tipo: Conference Paper or Presentation
Palavras-chave: Land Economics/Use.
Ano: 2001
URL: http://purl.umn.edu/20709

Global Match:  Helping Small Wineries Gain Access to Markets Worldwide
Provedor de dados: 31
Autores: Cholette,   Susan.
As the United States is predicted to become the world's largest wine consuming nation by 2008 with consumers purchasing across all price segments, one might assume that Californian wineries should thrive in this market.  However, regulations and consolidation effects often prevent small wineries from being able to reach the U.S. consumer and they face similar problems with exporting.  These wineries must seek specialty distributors that represent lesser-known brands, usually by attending trade shows at great expense.  In turn, specialty distributors face the daunting challenge of finding wineries that best satisfy their portfolios' needs.    Given this problematic situation, can one provide assistance to these parties in their quest for finding appropriate...
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade; Industrial Organization.
Ano: 2006
URL: http://purl.umn.edu/14862

QUALIDADE DO PROCESSO DE SEMEADURA DA CULTURA DO MILHO DE SEGUNDA SAFRA
Provedor de dados: 107
Autores: Arcoverde, Sálvio Napoleão Soares; de Souza, Cristiano Márcio Alves; Cortez, Jorge Wilson; Guazina, Renato Anastácio; Maciak, Paulo Alexandre Graciano.
A semeadura do milho está sujeita a fatores que podem interferir na qualidade da operação. O uso de métodos estatísticos de controle de qualidade em processos agrícolas tem-se mostrado eficiente para detecção de variabilidade no decorrer da operação. Objetivou-se avaliar a qualidade e capabilidade da semeadura do milho de segunda safra por semeadora-adubadora pneumática. A coleta de dados ocorreu no município de Dourados (MS) em área de aproximadamente 30 ha, utilizando-se malha amostral composta de 60 pontos distribuídos na área com uma amostra a cada 0,5 ha. Determinaram-se a quantidade de plântulas emergidas e a distância entre plantas em dois metros consecutivos, a fm de calcular o estande de plantas por metro e a porcentagem de espaçamentos normais,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mecanização Agrícola controle estatístico do processo; Distribuição longitudinal de sementes; Plantio direto.
Ano: 2017
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/709

Survey of major fungicides and insecticides sold by the agricultural and animal production stores of Bento Gonçalves for use in vine culture
Provedor de dados: 22
Autores: Zaffari, Eder Angelo; Borba, Regina da Silva.
The vine is a culture in expansion in Brazil and Rio Grande do Sul State comprises the largest area planted with the crop. The vine is subject to attacks by numerous pathogens and pests, and plant protection treatments up to 30% of the production cost. Several studies are performed with the purpose to find alternative control, but the main method used is still the chemical control. Thus, the objective of this work was a survey the main fungicides and insecticides sold in agricultural and animal production stores of Bento Gonçalves city, Rio Grande do Sul State, Brazil, suitable for the vine culture in 2013. It was performed the survey in agricultural and animal production stores in 2014, with the completion of interviews, with a total of six agricultural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agrotóxicos; Uva; Vitis spp.
Ano: 2016
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/12121

Ethical and civil responsibility of veterinary physicians in the veterinary hospital environment
Provedor de dados: 195
Autores: Slowinski, Ketlen; Tremori, Tália Missen; Massad, Mara Rita Rodrigues; Tasaka, Ana Cristina; Rocha, Noeme Sousa.
The importance given by society to pets has highly increasedover the last years, and now it is common to see theseanimals being considered as part of the family. Additionally,social networks and media in general have facilitated accessto information, so veterinarians need to be aware of theirethical and civil responsibilities in order to work accordingto proper procedures and consequently, avoid legalproblems. To guarantee this protection, it is fundamental forveterinarians to be informed about professional and generallaws that apply to this subject, by continuously maintainingthemselves updated regarding regulations. The obligationof the veterinarian at the veterinary hospital is consideredenvironmental, which means that he/she must put all thenecessary...
Tipo: Info:eu-repo/semantics/article
Ano: 2016
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/31816

Abomasal-umbilical fistula in calf: a case report
Provedor de dados: 195
Autores: Rodrigues, Henrique Alves; Alves, Rafael de Mello; Calciolari, Karina; Casas, Vítor Foroni; Dias, Fernanda Gosuen Gonçalves; Pereira, Lucas de Freitas.
Among the congenital and traumatic diseases observed in calves there are the umbilical hernias, in which abdominal organs may select their hernia contents, suffering strangulation and necrosis. In this sense, the involvement of the abomasum is rare, but when present it is noted the formation of abomasal-umbilical fistula. Being the rare abomasal-umbilical fistula and due to scientific papers on the subject being scarce, the aim of this report is to describe the case of a calf with progressive weight loss and drainage milk secretion via an umbilical hole. After institution of surgical treatment, the patient had significant clinical improvement, not showing to date (one year and four months after surgery) correlated clinical symptoms. However, emphasize...
Tipo: Info:eu-repo/semantics/article
Ano: 2015
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/25562

The veterinarian and the commercial ornamental fish trading
Provedor de dados: 195
Autores: de Araújo, Ana Paula; Pérez, Agar Costa Alexandrino de.
The purpose of this article is to inform the veterinarian about dealing with management and trading of ornamel1/al fish, all of tell neglected subject in Veterinary Medicine Schools and post-graduation courses. Ornamental fish trading is a well-established activity in Brail, but it lacks professionals addressing matters such as prophylactic management, pathology, diagnosis and treatment. Also, ir includes new concepts for the veterinarian, such as the ones represented by the physical and chemical properties of water. The article briefly addresses the most important points of this activity that should be considered from a veterinary medical standpoint.
Tipo: Info:eu-repo/semantics/article
Ano: 2005
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3138

Hemoparasites and hemotropic bacteria detected through direct microscopy in dogs peripheric blood samples in a veterinarian private clinic in the municipality of Lorena, São Paulo, Brazil
Provedor de dados: 195
Autores: Gavião Prado, Luan; Vieira Sene, Rafael; Camargo de Medeiros, Elisângela; Maioli do Nascimento, Letícia; Beatriz França de Faria, Ana.
Hemoparasitosis, diseases that may cause clinical and hematological complications, are considered a great challenge to practitioners and clinical pathologists. Its high incidence in all Brazilian territory and the difficulty for a precise diagnosis can lead in most cases to a therapeutic diagnosis. Anaplasma platys, Babesia canis vogeli, Ehrlichia canis, Mycoplasma haemocanis and with a lower frequency and clinical relevance, Anaplasma phagocytophilum are the main etiological agents affecting dogs in Brazil. The climatic conditions found in several Brazilian areas, such as high rain and temperature levels, favor the arthropods vectors life cycles. This subject became an important challenge to both veterinarians and pet owners. These etiological agents...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hemoparasite; Anaplasma; Babesia; Mycoplasma; Ehrlichia; Hemoparasitose; Anaplasma; Babesia; Mycoplasma; Ehrlichia.
Ano: 2019
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37999

Emergency blood transfusion in piranga-tortoise (Chelonoidis carbonaria): case report
Provedor de dados: 195
Autores: Silva, André Nicolai E.; Rocha, Maria Carolina A. M.; Leite, Rafael Boralli R.
Blood transfusion is still a tool not much explored in wild animal clinics. Among the groups of wild animals, reptiles feature the lowest amount of references available on this subject. This report shows a successful case of blood transfusion in an adult red-footed tortoise (Chelonoidis carbonaria). The decision for the blood transfusion was based on the results of physical and laboratory examinations, which have shown intense dyspnea and haematology values significantly below the limits of previous references for this reptile. To carry out the procedure, an adult and healthy animal of the same species was selected as donor. The transfusion was performed directly and a blood volume of 30ml (1% of body weight) was collected from the donor and sequentially...
Tipo: Info:eu-repo/semantics/article
Ano: 2017
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37634

The veterinarian and the commercial ornamental fish trading
Provedor de dados: 195
Autores: de Araújo, Ana Paula; Pérez, Agar Costa Alexandrino de.
The purpose of this article is to inform the veterinarian about dealing with management and trading of ornamel1/al fish, all of tell neglected subject in Veterinary Medicine Schools and post-graduation courses. Ornamental fish trading is a well-established activity in Brail, but it lacks professionals addressing matters such as prophylactic management, pathology, diagnosis and treatment. Also, ir includes new concepts for the veterinarian, such as the ones represented by the physical and chemical properties of water. The article briefly addresses the most important points of this activity that should be considered from a veterinary medical standpoint.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ornamental fishes; Commerce; Organization and administration; Aquatic environment; Closed; Veterinarians Peces ornamentales; Comercio; Organización y administración; Ambiente acuático cerrado; Veterinarios peixes ornamentais; Comércio; Organização e administração; Ambiente aquático fechado; Médicos veterinários.
Ano: 2005
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3138

Ethical and civil responsibility of veterinary physicians in the veterinary hospital environment
Provedor de dados: 195
Autores: Slowinski, Ketlen; Tremori, Tália Missen; Massad, Mara Rita Rodrigues; Tasaka, Ana Cristina; Rocha, Noeme Sousa.
The importance given by society to pets has highly increasedover the last years, and now it is common to see theseanimals being considered as part of the family. Additionally,social networks and media in general have facilitated accessto information, so veterinarians need to be aware of theirethical and civil responsibilities in order to work accordingto proper procedures and consequently, avoid legalproblems. To guarantee this protection, it is fundamental forveterinarians to be informed about professional and generallaws that apply to this subject, by continuously maintainingthemselves updated regarding regulations. The obligationof the veterinarian at the veterinary hospital is consideredenvironmental, which means that he/she must put all thenecessary...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethics; Legislation; Consumer ética; Legislação; Consumidor.
Ano: 2016
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/31816

William Borrer, Hurstpierpoint, near Lewes, [Sussex], to James Edward Smith
Provedor de dados: 24
Autores: Borrer, William.
'Lichen stellaris' and its affinities "very imperfectly understood" by English botanists: encloses specimens [not extant] and remarks [extant] on those occurring within this neighbourhood, except 'L. caesius' and 'L. aleurites', which are sufficiently known. Uncertain about his quotation of Acharius; necessity for a work on the subject according to [Dawson] Turner's recommendations in "Linnean Transactions" vol 7. Notes written West Town, [near Lewes, Sussex], November 1804, on 8 lichens: 'Lichen cycloselis', 'L. ulothrex', 'L. virellus', 'L. pulverulentus', 'L. aipolius', 'L. anthelinus', 'L. stellaris', and a new 'Lichen'. 5 coloured drawings on 2 folios of several lichens, with pencil notes [by Smith] naming 'Lichen nigro-virens' found by Charles Lyell...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63783/1/JES-COR-21-6_001.tif

'Collegium docimasticum'
Provedor de dados: 24
Autores: Linné, Carl von.
Synopsis of the course Linnaeus taught at Uppsala in the summer of 1733 on mineralogy and the art of assaying in order to pay his debts. It was attended by a large audience  and he received around 200 silver dalers (each pupil being charged 2 plåtar).  Contents: p. 3 Title page 'Caroli Linnaei | M. et H. N. C. | 'Vulcanus Docimasticus [later insert] | Collegium Docimasticum | in qvo | Ars Docimastica | vulgo | Prober-Konsten | dicta | brevissime et dilucide proponitur | cum | instrumentis, materialibus &amp; processibus | generalibus ac specialibus | nec non | cautelis, observationibus &amp; variationibus | cum | Appendice | de | Re Nummaria | habitum | coram | curiosissimis na[tur]ae indagoribus | Upsaliae 1733' p. 4 'Auditores Benevoli' p. 5 'Intimatio'...
Tipo: Collection
Ano: 2023

Sir Thomas Frankland, Thirkleby, [Yorkshire], to Sir James Edward Smith
Provedor de dados: 24
Autores: Frankland, Sir Thomas, 6th baronet.
Received Smith's letter of 30 [August] enclosing his son's sketch of 'Lepas anatifera'; was not aware of such an accumulation of shells but should have known at first sight and happy to hear of his son's short interview with Smith. His son and daughter-in-law have a 9 month old daughter, latter "makes herself mistress of whatever subject she undertakes by reading &amp; retaining all"; she makes out botany genera "with great acuteness" and his son shapes his pursuits to hers and the garden benefiting from their attention to it. Pest control: plagued with wasps this summer and they tried destroying every nest and also hung 100 opodeldoe phials baited with treacle, but the most effective solution were small Scotch gauze landing nets with an iron wire bow held...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/63033/1/JES-COR-15-57_001.tif

David Hosack, New York, to Sir James Edward Smith, Surrey Street, Norwich, [Norfolk]
Provedor de dados: 24
Autores: Hosack, David.
Received Smith's letter of 24 March and "Compendium [florae Britannicae]". [American] Philosphical Society to publish their second volume within the next six months, invites Smith to send a paper. Intending to send his son to Oxford or Cambridge. The books he is sending to Sir Joseph Banks and Horticultural Society, under care of his fellow former student [Joseph] Sabine, may differ from those he sends to Smith. Sending various unnamed magazines and publications, including book on "Life of Mr Fullar, inventor of steamboats", asks Smith to present it to the Royal Society after he has read it. Sends papers on contemplated canal between Lake Erie and the Hudson river, work of which has begun under direction of DeWitt Clinton. Clinton has just been elected...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/61933/1/JES-COR-5-83_001.tif

Ecologia de populações de morcegos cavernícolas em uma região cárstica do sudeste do Brasil
Provedor de dados: 104
Autores: Trajano,Eleonora.
The upper valley of the Rio Ribeira, a carbonatic rock region in the south of the state of São Paulo, Brazil, has a great number of caves; the bat community of the area is the subject of the present study. Between October 1978 and October 1980 specimens of five families and 23 species were captured. The species showed an irregular distribution among 32 of 39 caves visited. The community is very diversified, consisting of a specially abundant species (Desmodus rotundus), some very common species (Carollia perspicillata, Artibeus lituratus and Anoura caudifer), and several common and rare species. It differs from other neotropical communities studied in the relatively high frequence of A. caudifer, which probably takes over the ecological role of Glossophaga...
Tipo: Info:eu-repo/semantics/article
Ano: 1984
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751984000100001

Response of Tunisian durum (Triticum turgidum ssp. durum) and bread (Triticum aestivum L.) wheats to water stress
Provedor de dados: 115
Autores: Ayed,Sourour; Rezgui,Mohsen; Othmani,Afef; Rezgui,Mounir; Trad,Hiba; Silva,Jaime A. Teixeira-da; Ben Younes,Mongi; Ben Salah,Hamadi; Kharrat,Mohamed.
Abstract Wheat is a staple crop in Tunisia, but little is known about the response of Tunisian durum wheat (Triticum turgidumssp.durum) and bread wheat (Triticum aestivum L.) to water stress. In semi-arid regions, where cereals are concentrated, grain yield is subject to water deficit especially due to variability in rainfall. Therefore, the objective of this study was to evaluate the response to water stress of three durum wheat (Mâali, Nasr and Salim) and two bread wheat (Tahent and Utique) varieties. The experimental design was a complete randomized block, water treatments were rainfed conditions (T0) and irrigation applied at the tillering and flowering stages (T1, control) with three replications per treatment, and data was analyzed by ANOVA and Tukey...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water stress; Durum wheat; Bread wheat; Grain yield; Yield components.
Ano: 2017
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952017000100013

Estudos sobre o «vermelhão» do algodoeiro (III)
Provedor de dados: 43
Autores: Coury,T.; Ranzani,G.; Malavolta,E.; Brasil Sobrinho,M. O. C. do.
In several cotton crops areas of the State of S. Paulo it was observed, during the years of 1948, 1949, and 1951, the appearance of a purple color of the leaves; the color appears in the opening of the bolls and was correlated with a decrease of production. The opinions concerning the cause of such abnormality were very different and sometimes contradictory; certain investigators attributed the disease to insect attack, others to bad climatic conditions whereas others to a potassium deficiency now called "fome de potássio" (potash hunger); our ideas on the subject is another one. We think that the disease is caused by lack of a suitable supply of magnesium. This opinion is largely based on the syntomatology found in the literature. To study the problem,...
Tipo: Info:eu-repo/semantics/article
Ano: 1953
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761953000100006

Assessment of surface temperatures of buffalo bulls (Bubalus bubalis) raised under tropical conditions using infrared thermography
Provedor de dados: 45
Autores: Barros,D.V.; Silva,L.K.X.; Kahwage,P.R.; Lourenço Júnior,J.B.; Sousa,J.S.; Silva,A.G.M.; Franco,I.M.; Martorano,L.G.; Garcia,A.R.
This paper aimed to evaluate the surface temperatures of buffalo bulls using infrared thermography, considering four distinct anatomical parts over time, and to correlate surface temperatures and thermal comfort indexes. The humid tropical climate (Köppen's Afi) was predominant in the research station where the experiment was performed and the trial lasted from April to August. Ten bulls (n=10) were evaluated every 25 days (morning: 6:00-9:00; afternoon: 12:00-15:00) and the parameters assessed were respiratory rate (RR), rectal temperature (RT), and the thermograms of surface temperature for orbital area (ORB), right flank (RF), left flank (LF) and scrotum (SCR). Climatological data was continuously monitored and the Temperature and Humidity Index (THI)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Water buffalo; Infrared imaging; Core temperature; Body surface temperature.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000200422

Courtship, vocalization, and tadpole description of Epipedobates flavopictus (Anura: Dendrobatidae) in southern Goiás, Brazil
Provedor de dados: 49
Autores: Costa,Ronan Caldeira; Facure,Kátia Gomes; Giaretta,Ariovaldo Antonio.
Epipedobates flavopictus is a diurnal, aposematic dendrobatid with a wide distribution in seasonal wet tropical regions of Brazil. We describe the daily period of vocalization, advertisement call, courtship behavior, and tadpole of E. flavopictus from a previously unknown population in southern Goiás and compare theses features with that of other populations. Studies were carried out in November (2004) and February (2005). We counted the number of calling males and duration of calling bouts in the morning and evening periods. The advertisement call was recorded with a digital recorder. Tadpole description was based on specimens collected in pools. Males called from well-illuminated sites such as rocky fields, rain channels, and borders of riverine forests....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Populational variation; Brazilian Cerrado; Habitat; Pattern of activity; Behavior; Reproduction; Advertisement call.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000100006

Ensaio de variedades de cafeeiros II
Provedor de dados: 53
Autores: Mendes,J. E. Teixeira.
An experiment was started in 1931 for the purpose of making a comparative study of the productivity of following varieties of Coffea arabica L, : Nacional (Coffea arabica L. var. typica Cramer) Amarelo de Botucatu (Coffea arabica L. var. typica Cramer forma xanthocarpa (Caminhoá) Krug) Bourbon (Coffea arabica L. var. bourbon (B. Rodr.) Choussy) Bourbon amarelo (Coffea arabica L. var. bourbon (B. Rodr.) Choussy forma xanthocarpa Krug) Sumatra (Coffea arabica L. var. typica Cramer) Maragogipe (Coffea arabica L. var. maragogipe Hort. ex Froehner) The results obtained from this experiment for the period 1935-1938 have been the subject of a previous publication. The present paper concerns results obtained from the same experiment for the period 1939-1946. The...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000200001

Theories about evolutionary origins of human hepatitis B virus in primates and humans
Provedor de dados: 55
Autores: Souza,Breno Frederico de Carvalho Dominguez; Drexler,Jan Felix; Lima,Renato Santos de; Rosário,Mila de Oliveira Hughes Veiga do; Netto,Eduardo Martins.
Introduction:The human hepatitis B virus causes acute and chronic hepatitis and is considered one of the most serious human health issues by the World Health Organization, causing thousands of deaths per year. There are similar viruses belonging to the Hepadnaviridae family that infect non-human primates and other mammals as well as some birds. The majority of non-human primate virus isolates were phylogenetically close to the human hepatitis B virus, but like the human genotypes, the origins of these viruses remain controversial. However, there is a possibility that human hepatitis B virus originated in primates. Knowing whether these viruses might be common to humans and primates is crucial in order to reduce the risk to humans.Objective:To review the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatitis B virus; Hepadnaviridae; Non-human primates; Evolutionary origins.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000500535

The effect of sun exposure on 25-hydroxyvitamin D concentrations in young healthy subjects living in the city of São Paulo, Brazil
Provedor de dados: 56
Autores: Maeda,S.S.; Kunii,I.S.; Hayashi,L.; Lazaretti-Castro,M.
The range of 25-hydroxyvitamin D (25OHD) concentration was determined in a young healthy population based on bone metabolism parameters and environmental and behavioral aspects. We studied 121 healthy young volunteers (49 men, 72 women) living in São Paulo (23º 34' south latitude) belonging to three occupational categories: indoor workers (N = 28), medical school students (N = 44), and resident physicians (N = 49). Fasting morning blood samples were collected once from each volunteer from August 2002 to February 2004, and 25OHD, total calcium, albumin, alkaline phosphatase, phosphorus, creatinine, intact parathyroid hormone, osteocalcin, and type I collagen carboxyterminal telopeptide were measured. Data are reported as means ± SD. Mean subject age was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 25-Hydroxyvitamin D; Parathyroid hormone; Occupational aspects; Seasonal influence; 25OHD and solar exposure.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007001200009

Effect of age and gender on sweat lactate and ammonia concentrations during exercise in the heat
Provedor de dados: 56
Autores: Meyer,F.; Laitano,O.; Bar-Or,O.; McDougall,D.; Heigenhauser,G.J.F.
The dependence of sweat composition and acidity on sweating rate (SR) suggests that the lower SR in children compared to adults may be accompanied by a higher level of sweat lactate (Lac-) and ammonia (NH3) and a lower sweat pH. Four groups (15 girls, 18 boys, 8 women, 8 men) cycled in the heat (42ºC, 20% relative humidity) at 50% VO2max for two 20-min bouts with a 10-min rest before bout 1 and between bouts. Sweat was collected into plastic bags attached to the subject's lower back. During bout 1, sweat from girls and boys had higher Lac- concentrations (23.6 ± 1.2 and 21.2 ± 1.7 mM; P &lt; 0.05) than sweat from women and men (18.2 ± 1.9 and 14.8 ± 1.6 mM, respectively), but Lac- was weakly associated with SR (P &gt; 0.05; r = -0.27). Sweat Lac-...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sweat pH; Electrolytes; Ammonia; Lactate.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000100017

Lack of tolerance for the anti-dyskinetic effects of 7-nitroindazole, a neuronal nitric oxide synthase inhibitor, in rats
Provedor de dados: 56
Autores: Novaretti,N.; Padovan-Neto,F.E.; Tumas,V.; da-Silva,C.A.; Del Bel,E.A.
7-Nitroindazole (7-NI) inhibits neuronal nitric oxide synthase in vivo and reduces l-DOPA-induced dyskinesias in a rat model of parkinsonism. The aim of the present study was to determine if the anti-dyskinetic effect of 7-NI was subject to tolerance after repeated treatment and if this drug could interfere with the priming effect of l-DOPA. Adult male Wistar rats (200-250 g) with unilateral depletion of dopamine in the substantia nigra compacta were treated with l-DOPA (30 mg/kg) for 34 days. On the 1st day, 6 rats received ip saline and 6 received ip 7-NI (30 mg/kg) before l-DOPA. From the 2nd to the 26th day, all rats received l-DOPA daily and, from the 27th to the 34th day, they also received 7-NI before l-DOPA. Animals were evaluated before the drug...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitric oxide; Nitric oxide synthase; Parkinson’s disease; L-DOPA; Dyskinesia; DOPA priming; 7-Nitroindazole.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001100006

El arte de gobernar al sistema educativo : discursos de Estado y nuevas interpelaciones
Provedor de dados: 122
Autores: Giovine, Renata.
El buen gobierno ha sido y es una Preocupación de los estados y las instituciones desde el momento mismo que el hombre pasó de ser un animal viviente a un homo económico y político. Esta tesis se interroga acerca del arte de gobernar al sistema educativo bonaerense en el período comprendido entre 1990 y 2006. El objetivo general es analizar cómo se estructura y reestructura el campo discursivo y simbólico; qué viejas y nuevas estrategias de poder despliega; qué alianzas, acuerdos e intercambios se producen; y el modo de interpelación a los diferentes niveles de estado –nacional, provincial y municipal-, a individuos, organizaciones gubernamentales y de la sociedad civil. Para ello se focaliza la investigación en aquellas modificaciones que se proponen para...
Tipo: Tesis
Palavras-chave: SISTEMA EDUCATIVO; DISCURSO PEDAGÓGICO; RELACIONES DE PODER; POLÍTICA EDUCATIVA; GLOBALIZACIÓN; ALIANZAS POLÍTICAS; MONOPOLIOS; ARGENTINA; BUENOS AIRES (PROVINCIA); EDUCATION SYSTEM; POWER RELATIONS; EDUCATION POLICY; TEACHING SPEECH; GLOBALIZATION; POLITICAL ALLIANCES; MONOPOLIES; BUENOS AIRES (PROVINCE).
Ano: 2010
URL: http://hdl.handle.net/10469/2617

Incendios forestales en el Distrito Metropolitano de Quito (DMQ) : conocimiento e intervención pública del riesgo (Dossier)
Provedor de dados: 122
Autores: Estacio, Jairo; Narváez, Nixon.
En cada época de verano, el Distrito Metropolitano de Quito (DMQ) es susceptible a la recurrencia de incendios forestales con diferentes consecuencias en términos de pérdida de áreas protegidas y de gran biodiversidad, afectación a espacios de propiedad pública y privada de diferentes usos y, en general, repercusiones al bienestar de la población.  Las formas de gestión sobre este tipo de riesgos por parte de las autoridades municipales correspondientes es aún limitado, pues no existen herramientas de decisión que ayuden a la planificación preventiva y mejore la respuesta ante la presencia anual de eventos. Por tal motivo, la generación de un estudio sobre incendios forestales potenciales constituye un primer paso hacia su comprensión y reducción de...
Tipo: Artículo
Palavras-chave: RIESGOS URBANOS; GESTIÓN URBANA; INCENDIOS FORESTALES; VULNERABILIDAD; ÍNDICE DE COMBUSTIÓN; COEFICIENTE DE BIOMASA; ÍNDICE TOPOMORFOLÓGICO; URBAN RISK; URBAN MANAGEMENT; FOREST FIRES; VULNERABILITY; COMBUSTION INDEX; BIOMASS COEFFICIENTS; TOPO-MORPHOLOGICAL COEFFICIENTS; DISTRITO METROPOLITANO DE QUITO; ECUADOR.
Ano: 2012
URL: http://hdl.handle.net/10469/3814

La ciudadanía fiscal
Provedor de dados: 122
Autores: Carrasco, Carlos Marx.
La Revolución Ciudadana, como se denomina el proyecto emprendido por el actual Gobierno Ecuatoriano, marca un quiebre no solo en el manejo tradicional de las herramientas de política económica, sino, y más importante, en el reconocimiento explícito del ser humano como sujeto y fin de la relación entre Estado y Sociedad. Bajo esta visión la trilogía Ética - Pacto Social – Cohesión Social se consolida en un solo concepto, el de Ciudadanía Fiscal. Este documento busca en primer término reflexionar sobre las interdependencias de esta trilogía hasta llegar a redefinir la Ciudadanía Fiscal como ‘la conciencia de las personas, grupos e instituciones, acerca de su responsabilidad y compromiso con la construcción de una sociedad cohesionada, democrática y justa, a...
Tipo: Artículo
Palavras-chave: CIUDADANIA FISCAL CONTRIBUYENTES ADMINISTRACIÓN TRIBUTARIA REVOLUCIÓN CIUDADANA CORREA; RAFAEL DEMOCRACIA OBLIGACIONES TRIBUTARIAS ECUADOR CITIZENSHIP FISCAL TAXPAYERS TAX ADMINISTRATION CITIZEN REVOLUTION DEMOCRACY TAX LIABILITY.
Ano: 2010
URL: http://hdl.handle.net/10469/3872

Incendios forestales en el Distrito Metropolitano de Quito (DMQ) : conocimiento e intervención pública del riesgo (Dossier)
Provedor de dados: 122
Autores: Estacio, Jairo; Narváez, Nixon.
En cada época de verano, el Distrito Metropolitano de Quito (DMQ) es susceptible a la recurrencia de incendios forestales con diferentes consecuencias en términos de pérdida de áreas protegidas y de gran biodiversidad, afectación a espacios de propiedad pública y privada de diferentes usos y, en general, repercusiones al bienestar de la población.  Las formas de gestión sobre este tipo de riesgos por parte de las autoridades municipales correspondientes es aún limitado, pues no existen herramientas de decisión que ayuden a la planificación preventiva y mejore la respuesta ante la presencia anual de eventos. Por tal motivo, la generación de un estudio sobre incendios forestales potenciales constituye un primer paso hacia su comprensión y reducción de...
Tipo: Artículo
Palavras-chave: RIESGOS URBANOS; GESTIÓN URBANA; INCENDIOS FORESTALES; VULNERABILIDAD; ÍNDICE DE COMBUSTIÓN; COEFICIENTE DE BIOMASA; ÍNDICE TOPOMORFOLÓGICO; URBAN RISK; URBAN MANAGEMENT; FOREST FIRES; VULNERABILITY; COMBUSTION INDEX; BIOMASS COEFFICIENTS; TOPO-MORPHOLOGICAL COEFFICIENTS; DISTRITO METROPOLITANO DE QUITO; ECUADOR.
Ano: 2012
URL: http://hdl.handle.net/10469/3814

Alumnas embarazadas y/o madres : pruebas escolares, soportes y resistencias en contextos de marginalidad urbana
Provedor de dados: 122
Autores: V??zquez, Mar??a Soledad.
Esta tesis aborda el v??nculo embarazo y/o maternidad-escolarizaci??n. Se propone como un espacio desde el cual discutir te??rica y emp??ricamente que las  maternidades adolescentes provocan inexorablemente el abandono escolar.  En ella convergen aportes de la sociolog??a de la educaci??n cr??tica contempor??nea; la perspectiva cr??tica sobre embarazos y maternidades adolescentes y el enfoque biogr??fico. Desde esta conjunci??n, indaga las experiencias escolares de seis alumnas  madres y tres alumnas gestantes que viven en contextos urbano-marginales,  escolarizadas en una Escuela de Reingreso del sur de la Ciudad de Buenos Aires. El argumento central propone que las experiencias escolares de estas j??venes constituyen acontecimientos significativos que,...
Tipo: Tesis
Palavras-chave: EMBARAZO; ADOLESCENCIA; MATERNIDAD; ESCOLARIZACI??N; DESERCI??N ESCOLAR; ESCUELAS DE REINGRESO; ENTREVISTAS; ARGENTINA; BUENOS AIRES [CIUDAD].
Ano: 2014
URL: http://hdl.handle.net/10469/6122

Regalos, vigilancia y comunidades imaginadas fallidas : ayuda cristiana global y desigualdad en el patrocinio de ni??os en los Andes ecuatorianos (Temas)
Provedor de dados: 122
Autores: Moreno Parra, Mar??a.
Este ensayo analiza la manera en la cual una organizaci??n para el desarrollo ind??gena, que trabaja con una agencia internacional evang??lica donante, participa en un ???gobierno de poblaciones??? a trav??s del sistema de patrocinio de ni??os. Por un lado, la organizaci??n ind??gena est?? sujeta a la verticalidad jer??rquica de la agencia, a trav??s del proceso de legibilidad y rendici??n de cuentas, llevado a cabo para asegurar el correcto funcionamiento del sistema de patrocinio. Por otro lado, la organizaci??n ind??gena vigila a ciertos sectores de la poblaci??n y controla a los ni??os y a sus familias. Adem??s, se explica c??mo las pr??cticas relacionadas al patrocinio de ni??os ???tales como los regalos que mandan los padrinos y la correspondencia...
Tipo: Art??culo
Palavras-chave: ORGANIZACIONES NO GUBERNAMENTALES (ONGS); PROTESTANTISMO; DESARROLLO LOCAL; IND??GENAS; RENDICI??N DE CUENTAS; NI??EZ; FAMILIA.
Ano: 2014
URL: http://hdl.handle.net/10469/6111

Caractérisation des composantes hydrodynamiques d'une lagune mésotidale, le Bassin d'Arcachon.
Provedor de dados: 5
Autores: Plus, Martin; Maurer, Daniele; Stanisiere, Jean-yves; Dumas, Franck.
Introduction and objectives of the study: Understanding the operation modes of the coastline systems requires the study of the hydrodynamics responsible for transporting the whole of the chemical and biological elements of which they are composed. The idea of maintaining a close connexion between the physics, biology, geology and chemistry of the oceans is not new, and was for that matter the subject of a note in the first report of the International Council for the Study of the Oceans (ICSS) in 1902 (Sverdrup et al., 1954):  " it was seen from the beginning that the study of the physical conditions, of the chemical nature of the ocean waters, of the currents, etc., was of the greatest importance for the investigation of the problems connected with life,...
Tipo: Text
Palavras-chave: France; Atlantic north east; Arcachon basin; Modelling; Measuring; Current; Hydrodynamic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2352.pdf

Discard Atlas of the North Western Waters Demersal Fisheries
Provedor de dados: 5
Autores: Cefas.
The landing obligation is a key element of the reform to the Common Fisheries Policy (CFP) which came into force on 1st January 2014. Other key changes include regionalised fisheries management and a legal commitment to fish sustainably. A ban on discarding comes into force for pelagic fisheries first, on 1st January 2015. Subsequently, it will cover demersal fisheries between 2016 and 2019. It only applies to fish stocks which are managed by catch limits, or quotas. Non-quota stocks are not covered by the discard ban. The landing obligation, often referred to as the discard ban, is a ban on discarding fish which are subject to catch limits, so that all catches must be brought ashore, except where they are subject to specific exemptions. This means that...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00287/39819/41211.pdf

Caractérisation des composantes hydrodynamiques d'un système côtier semi-fermé : Le Bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Stanisiere, Jean-yves; Dumas, Franck; Plus, Martin; Maurer, Daniele; Robert, Stephane.
Introduction and objectives of the study: Understanding the operating modes of the coastline systems requires the study of the hydrodynamics responsible for transporting the whole of the geobiological compartments of which they are composed. The idea of maintaining a close connexion between the physics, biology, geology and chemistry of the oceans is not new, and was for that matter the subject of a note in the first report of the International Council for the Study of the Oceans (ICSS) in 1902 (Sverdrup et al., 1954): ... it was seen from the beginning that the study of the physical conditions, of the chemical nature of the ocean waters, of the currents, etc., was of the greatest importance for the investigation of the problems connected with life, that...
Tipo: Text
Palavras-chave: France; Atlantic north east; Marennes Oleron basin; Modellling; Hydrodynamic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2353.pdf

Seychelles tuna bulletin : second quarter 1995
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (1ogbooks') returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior o the generation of the statistical tables is shown at the head of each table. Purse seiners Principal Points - The revised total purse seine tuna catch for the western...
Tipo: Other
Palavras-chave: Catch statistics; Purse seiners; Tuna fisheries.
Ano: 1995
URL: http://hdl.handle.net/1834/5169

Farmer Consumer Partnerships: Information search and decision making - the case of ethical values of organic products
Provedor de dados: 21
Autores: Zander, Katrin; Hamm, Ulrich.
The CORE Organic pilot project ‘Farmer Consumer Partnerships’ aims at analysing and testing innovative communication strategies of organic companies with respect to ethical values as a means of reconnecting organic farmers and consumers against the varying cultural and behavioural backgrounds of consumers in five European countries (AT, CH, DE, IT UK).   The previous work packages (WP1 and WP2) provided a selection of the most promising communication arguments with respect to ethical values of organic food based on literature review and on the farmers’ or farmers’ initiatives point of view. Based on this, the task is to narrow down the wide range of existing arguments related to ethical values in organic food production. Therefore, the arguments were...
Tipo: Report
Palavras-chave: Values; Standards and certification Consumer issues.
Ano: 2009
URL: http://orgprints.org/15199/1/CORE_FCP_WP3_Report.pdf

How many compromises can organic farming afford?
Provedor de dados: 21
Autores: Jensen, Karsten Klint; Forkman, Björn; Sandøe, Peter.
Organic farming commits itself to a number of substantial values, and thereby it sets itself apart from conventional farming. In general, conventional large-scale intensive farming only commits itself to producing what the market demands. The market is, of course, regulated by national and international legislation. Within the limits set by legislation, international competition leaves very limited freedom of action for producers. This puts the responsibility for the state of affairs largely on the consumer or legislators.1 If, for instance, consumers would like to have better conditions for farm animals, the conventional farmers would, in theory at least, be happy to provide it as long as a sufficiently large segment of consumers are willing to pay more...
Tipo: Working paper
Palavras-chave: Values; Standards and certification Health and welfare Consumer issues.
Ano: 2010
URL: http://orgprints.org/18793/4/18793.pdf

Agricultural policies and farm structures.  Agent-based modelling and application to EU-policy reform.
Provedor de dados: 31
Autores: Happe,   Kathrin.
Agricultural structures have been shaped by a variety of factors including economic, cultural, historical, political, technological, and geographical conditions. Moreover, agricultural structures are not static. Structural change can be characterised as an evolutionary process consisting – among other things – of constant adjustment to changes in demand, supply, and technological progress. The development of competitive and efficient agricultural structures has been one of the central goals of agricultural policy making in addition to ensuring a fair standard of living for farmers. To achieve these goals, the agricultural sector in most industrialized nations has long been the subject of government interventions. However, many agricultural policies have...
Tipo: Thesis or Dissertation
Palavras-chave: Agricultural and Food Policy; Farm Management; Institutional and Behavioral Economics.
Ano: 2004
URL: http://purl.umn.edu/93019

Hidrogramas para a bacia hidrográfica do ribeirão Serragem no município de Tremembé, SP
Provedor de dados: 25
Autores: Targa, Marcelo dos Santos; Batista, Getulio Teixeira; Mostarda Neto, Nazareno; Maria Filho, Paulo José.
O presente trabalho objetivou determinar os Hidrogramas de Precipitações Efetivas Máximas a partir do método do Hidrograma Unitário (HU) da bacia do Ribeirão Serragem no município de Tremembé, SP no vale do Paraíba do Sul, localizada na parte a montante da barragem da Fazenda Maristela. Foram empregadas técnicas de geoprocessamento com o uso de ferramentas do SPRING para a caracterização do uso e ocupação do solo e caracterização física da bacia para o cálculo da Precipitação efetiva (Pe) resultante de chuvas máximas sobre a bacia simuladas para 2, 5, 10, 15, 20, 25, 50, 100 e 200 anos. O cálculo da Pe foi realizado pelo método do Curva Número (CN). Os resultados indicaram que a bacia do Ribeirão Serragem apresenta um bom estado de conservação, levando em...
Tipo: Article
Palavras-chave: Bacia; Ciências ambientais; Escoamento; Uso do solo; Basin; Environmental science; Land use; Water flow.
Ano: 2015
URL: http://hdl.handle.net/2315/284

Sucesión de entofauna cadavérica utilizando como biomodelo Cerdo Blanco, Sus scrofa L.
Provedor de dados: 32
Autores: Flores Pérez, Leonardo Roberto.
La entomología forense es la disciplina que estudia a los insectos y otros artrópodos  que acuden a los cadáveres y que aportan información útil en investigaciones policiales  y judiciales, siendo la contribución más importante la estimación del intervalo  postmortem, el cual se basa en la tasa de desarrollo de determinada especie de insecto  (sobre todo díptero) y en los patrones de sucesión de insectos sarcosaprófagos en un  cuerpo en descomposición. Al existir objeciones éticas y morales al uso de cadáveres  humanos como modelos de estudios para el conocimiento de dichos insectos, se hace  inevitable el empleo de animales que permitan determinar la composición de insectos;  siendo el cerdo doméstico, el animal que presenta más semejanzas en el proceso...
Tipo: Tesis
Palavras-chave: Entomología forense; Intervalo postmortem; Sucesión de insectos; Dípteros; Coleópteros Forensic entomology; Postmortem interval; Insect succession; Coleopterans.
Ano: 2012
URL: http://hdl.handle.net/10521/1064

Estructura poblacional y dinámica de plántulas del cactus columnar Neobuxbaumia mezcalaensis (Bravo) Backeberg en la Cañada del Zopilote, Guerrero
Provedor de dados: 32
Autores: Nova Muñoz, Elizabeth.
El análisis de la estructura poblacional de una especie proporciona información sobre los procesos naturales y factores ambientales a que cada uno de sus estadios de desarrollo ha estado sujeto a través del tiempo. Dicha información es necesaria para diseñar estrategias para la utilización y conservación de la especie. El presente trabajo tuvo como objetivo analizar la estructura poblacional y demografía de plántulas de Neobuxbaumia mezcalaensis en tres parcelas de observación de 50 x 50 m (2500 m2) establecidas en la Cañada del Zopilote, Guerrero. Se registraron todos los individuos de N. mezcalaensis, se les midió su diámetro a la altura del pecho, su altura total y se ubicaron por sus coordenadas X y Y. Se utilizó el índice de Ripley para determinar el...
Palavras-chave: Índice de Ripley; Patrón de Distribución Espacial; Patrón de Correlación Espacial; Crecimiento en altura; Tasas de Supervivencia; Causas de Mortalidad; Ripley´s Index; Spatial Distribution Pattern; Spatial Correlation Pattern; Height Growth; Survival rates; Mortality Causes; Maestría; Forestal.
Ano: 2010
URL: http://hdl.handle.net/10521/138

Comportamiento productivo y reproductivo de ovinos de lana locales en la región de Tlatlauquitepec, Puebla.
Provedor de dados: 32
Autores: Castro González, Numa Pompilio.
El objetivo fue determinar la ganancia diaria de peso (GDP) de corderos de lana locales (criollos) y de pelo, así como, el comportamiento reproductivo de ovejas de lana locales de la región de Tlatlauquitepec, Puebla. Dos experimentos fueron conducidos: en el primero, 40 corderos locales de lana y 40 de pelo, se sometieron a pastoreo y confinamiento. El diseño experimental fue en bloques completamente al azar con arreglo factorial 2 x 2, donde el tipo genético y la alimentación fueron los factores a probar. El factor alimentación fue determinante (P&lt;0.0001) en obtener ganancias de peso diferenciadas. La GDP fue mayor en corderos alimentados en confinamiento. El tipo genético influenció (P&lt;0.01) la GDP donde, los corderos de pelo en pastoreo tuvieron...
Palavras-chave: Ovinos criollos; Ganancia diaria de peso; Sincronización; Creole sheep; Estro; Daily liveweight gain; Synchronization; Estrus; EDAR; Maestría Tecnológica; Desarrollo y Gestión de Sistemas Ganaderos.
Ano: 2010
URL: http://hdl.handle.net/10521/327

Daños por frío y calidad de frutos de pomerlo 'Río Red' sujetos a temperaturas de acondicionamiento, encerado y metil jasmonato.
Provedor de dados: 32
Autores: Franco Gaytán, Iván.
Se estudió el efecto del tratamiento de cuarentena (1.5°C/17d) autorizado para el control de mosca del mediterráneo (Ceratitis capitata Wied) en pomelo ‘Rio Red’. Sin embargo, al ser un fruto de clima tropical presenta alta sensibilidad a la refrigeración, lo que puede inducir una serie de alteraciones fisiológicas (daños por frío), que reducen significativamente su calidad. Es por esto que se evaluó la eficiencia de algunas tecnologías que promueven resistencia al frío y con esto mantener la calidad del fruto tras ser sometidos a tratamientos con bajas temperaturas con fines de almacenamiento y/o transporte.  Las tecnologías evaluadas fueron: Acondicionamiento del fruto a 17° C por 7 días, Encerado (frutos tratados con una cera comercial  conteniendo 14%...
Palavras-chave: Daños por frío; Pomelo; Tecnologías postcosecha; Maestría; Fruticultura; Chilling injury; Grapefruit; Postharvest technologies.
Ano: 2012
URL: http://hdl.handle.net/10521/1763

Expresión de proteínas y determinación de carbohidratos en maíz (Zea mays L.) en condiciones de estrés hídrico.
Provedor de dados: 32
Autores: Velázquez Márquez, Sabina.
La sequía es uno de los factores abióticos limitantes que causa reducción en el crecimiento, en la producción de biomasa y en el rendimiento de cultivos. Las variedades de maíz con cierta tolerancia a la sequía responden con cambios en su fisiología y metabolismo. Algunas de estas respuestas son disminución en el contenido relativo de agua, disminución del potencial osmótico, acumulación de solutos como la prolina y varios azúcares, así como también alteraciones en el contenido de proteínas. Las plantas de maíz tienen la capacidad de generar ajustes que les permite adaptarse y sobrevivir a ciertos niveles de déficit de agua. El objetivo del trabajo fue analizar el efecto del déficit de agua en la acumulación de solutos y en los cambios de proteínas en dos...
Palavras-chave: Relaciones hídricas; Acumulación de solutos; Maíz; RUBISCO; Proteínas solubles; Water relationships; Solutes accumulation; Soluble proteins; Botánica; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2309

Capital Social, propuesta metodológica para su medición en proyectos, caso laguna El Vigía, Centro, Tabasco
Provedor de dados: 32
Autores: Díaz Castillo, Martín.
En México para superar la pobreza rural y solucionar conflictos, se aplican políticas públicas con programas y proyectos bajo cuatro dimensiones del desarrollo: social, económico, ecológico, y político-institucional. El dictamen de factibilidad y viabilidad de éstos, aunque se sujetan a criterios estrictos y rigurosos, tienen baja efectividad, con escasos resultados exitosos. Sin embargo, son limitadas las iniciativas que incorporan un análisis de Capital Social como un elemento de dictaminación para el éxito de acciones. Por ello se propone una metodología para medir el Capital Social con tres indicadores: confianza, colaboración y reciprocidad, asociado con los indicadores económicos y sociales de la población involucrada, para lograr éxito en la...
Tipo: Tesis
Palavras-chave: Maestría; Desarrollo Rural.
Ano: 2008
URL: http://hdl.handle.net/10521/1554

Relaciones entre radiación solar, desarrollo y calidad de cactáceas ornamentales
Provedor de dados: 32
Autores: Sánchez Pérez, Anna Magali.
Las cactáceas tienen flores y características morfológicas atractivas que las hacen plantas  ornamentales muy apreciadas; se utilizan principalmente como ornato en exteriores pero  algunas también se pueden utilizar como plantas de interior; sin embargo, en interiores hay  bajos niveles de radiación fotosintéticamente activa (RFA), lo que influye en su crecimiento,  desarrollo y vida útil. En México hay poca investigación sobre el tema, por lo que el objetivo  de esta investigación fue analizar el efecto de diferentes niveles de RFA en el crecimiento,  periodo de floración y contenido de pigmentos (clorofila “a”, “b”, carotenoides y betalaínas)  en cuatro especies y analizar su capacidad de adaptación a bajos niveles de RFA. Las  especies fueron Rebutia...
Tipo: Tesis
Palavras-chave: Floración; Sombreo; Pigmentos; Copiapoa tenuissima; Echinopsis chamaecereus “aurea”; Rebutia heliosa; Rebutia muscula Flowering; Shading; Pigments; Copiapoa tenuíssima; Echinopsis chamaecereus aurea; Rebutia heliosa; Rebutia muscula.
Ano: 2012
URL: http://hdl.handle.net/10521/1056

Relaciones entre radiación solar, desarrollo y calidad de cactáceas ornamentales
Provedor de dados: 32
Autores: Sánchez Pérez, Anna Magali.
Las cactáceas tienen flores y características morfológicas atractivas que las hacen plantas  ornamentales muy apreciadas; se utilizan principalmente como ornato en exteriores pero  algunas también se pueden utilizar como plantas de interior; sin embargo, en interiores hay  bajos niveles de radiación fotosintéticamente activa (RFA), lo que influye en su crecimiento,  desarrollo y vida útil. En México hay poca investigación sobre el tema, por lo que el objetivo  de esta investigación fue analizar el efecto de diferentes niveles de RFA en el crecimiento,  periodo de floración y contenido de pigmentos (clorofila “a”, “b”, carotenoides y betalaínas)  en cuatro especies y analizar su capacidad de adaptación a bajos niveles de RFA. Las  especies fueron Rebutia...
Tipo: Tesis
Palavras-chave: Floración; Sombreo; Pigmentos; Copiapoa tenuissima; Echinopsis chamaecereus “aurea”; Rebutia heliosa; Rebutia muscula; Maestría; Fisiología Vegetal; Flowering; Shading; Pigments.
Ano: 2008
URL: http://hdl.handle.net/10521/1390

Estudio de rentabilidad  y márgenes de comercialización de la carne de bovino en la zona económica de Texcoco, Estado de México, 2006
Provedor de dados: 32
Autores: Gardea Cervantes, Gabriela Isabel.
El presente trabajo estudia la rentabilidad y  analiza el canal y márgenes de comercialización de la carne de bovino de la región III, Texcoco del estado de México de una explotación tÌpica.  La procedencia de los novillos es 100% nacional. Una vez finalizado el ganado es vendido a pie de granja  a los introductores o acopiadores rurales, quienes los sacrifican en los rastros municipales aledaños a la zona,  distribuyen la carne en canal a los detallistas de la región, el Distrito Federal  y la zona conurbana del Valle de México y éstos al  consumidor. Los márgenes calculados se basan en los datos obtenidos de la investigación directa en la zona de estudio por muestreo de conveniencia.     El estudio de los indicadores de rentabilidad se efectuó con...
Tipo: Tesis
Palavras-chave: Carne de bovino; Rentabilidad; Canal de comercialización; Márgenes de comercialización; Maestría; Economía; Beef; Profitability; Channel and margin on marketing.
Ano: 2008
URL: http://hdl.handle.net/10521/1282

Evaluación de tierras por capacidad de uso urbano en la zona periurbana de Villahermosa Tabasco.
Provedor de dados: 32
Autores: Morales Garduza, Marcos Antonio.
En planicies tropicales húmedas del Sureste de México, varias ciudades se asientan en tierras bajas sujetas a inundación, y como alternativa para la planeación de asentamientos humanos, se desarrolló una metodología que evalúa la capacidad de uso del suelo urbano. Mediante revisión bibliográfica se seleccionaron los factores ambientales que presentan mayores restricciones para el uso urbano como inundación, relieve, pendiente, suelo y uso del suelo. Se diseñó un modelo matemático que determina el Índice de Capacidad de Uso del Suelo Urbano (ICUSU) y se aplicó a la zona periurbana de la ciudad de Villahermosa, Tabasco, que ha sufrido varias inundaciones en las últimas décadas, por ubicarse en planicies fluviales y terrazas. Se generó cartografía a escala 1:...
Palavras-chave: Evaluación; Tierras; Uso urbano; Evaluation; Land; Urban use; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/761

IGF-1 y actividad ovárica en la fase folicular tardía de cabras suplementadas con proteina no degradable en rumen en diferente condición corporal
Provedor de dados: 32
Autores: Guerra García, Minerva.
La influencia de la nutrición en la función ovárica se clasifica como “efecto estático”,  “efecto dinámico” (Meza-Herrera et al., 2004) y “efecto agudo” (Scaramuzzi et al.,  2006).  Dichos efectos son mediados por cambios en los niveles de hormonas  metabólicas y de la superfamilia de factores de crecimiento (Meza-Herrera et al.,  2006), pero su importancia relativa y rutas de acción necesitan ser dilucidados   (Martin et al., 2004).  Se utilizaron 32 cabras de 19 meses de edad, F1  (AlpinoxNubia), sometidas a un periodo de adaptación de 40 días, registrando los  pesos corporales y la condición corporal (Russel et al., 1969), al inicio y cada quince  días en ayunas.  A partir del día 40, la dieta consistió de heno de alfalfa molido y dos  niveles de...
Tipo: Tesis
Palavras-chave: Actividad ovárica; Cabras; Condición corporal; IGF-I; Proteína no degradable en rumen; Maestría; Ganadería; Ovaric activity; Goats; Body condition; Non-degradable protein in rumen.
Ano: 2007
URL: http://hdl.handle.net/10521/1439

Los derechos de propiedad intelectual y el maíz criollo mexicano: el caso de la gestión del conocimiento en la comunidad de Yaxcabá, Yucatán, México
Provedor de dados: 32
Autores: Bárcenas Argüello, Rosa Josefina.
La situación de los Derechos de Propiedad Intelectual y su relación con el  Conocimiento  Tradicional en México es un tema complicado, ya que el consenso generalizado es que el  conocimiento tradicional no posee las características del conocimiento formal tales como  la sistematización, experimentación, comprobación y registro escrito.    En este documento, con un estudio de caso, se muestra que el Conocimiento Tradicional  se integra por procesos que generan productos, productos diferenciados, y subproductos.  El sujeto de estudio es el maíz criollo cultivado bajo el sistema de milpa roza-tumba-  quema en Yaxcabá, Yucatán, México.    Con recorridos de campo, entrevistas con guía semiestructurada, y observación  participante, se identificó que en la...
Tipo: Tesis
Palavras-chave: Conocimientos tradicionales; Derechos de Propiedad Intelectual; Maíz criollo; Milpa en roza-tumba-quema; Productos diferenciados; Maestría; Desarrollo Rural; Traditional knowledges; Intellectual property rights; Mative corn; Milpa in roza- knock down- burn; Distinction products.
Ano: 2008
URL: http://hdl.handle.net/10521/1299

La flora y vegetación ruderal de Malinalco, Estado de México.
Provedor de dados: 32
Autores: Martínez de la Cruz, Isabel.
La vegetación arvense y ruderal de México contribuye sustancialmente a la riqueza de especies en México. En los últimos años, sobre todo desde la apertura del comercio con regiones vecinas y lejanas, ha cobrado interés el tema de las plantas exóticas invasoras, debido a su impacto actual y potencial sobre la conservación y las actividades agropecuarias. Existe poca información a nivel nacional concerniente a las plantas vasculares que se desarrollan en ambientes modificados, en particular del hábitat ruderal. Este trabajo tiene el objetivo de contribuir al conocimiento de la vegetación ruderal de una región en el límite entre tipos de clima (templado y tropical) y reinos florísticos (Holártico y Neotropical), a través del análisis de la composición...
Palavras-chave: Vegetación ruderal; Especies nativas y exóticas; Características biológicas; Composición biogeográfica; Relaciones florísticas; Ruderal vegetation; Native and exotic species; Biological characteristic; Biogeographic composition; Floristic relationships; Maestría; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/143

Áreas prioritarias mediante escenarios de deforestación y servicios ambientales en la Sierra Norte de Puebla.
Provedor de dados: 32
Autores: Chávez González, Honoria.
La identificación de áreas prioritarias es una herramienta valiosa que permite orientar y optimizar los esfuerzos de estudio, conservación y aprovechamiento sustentable de recursos forestales. La presente investigación integró una metodología, mediante la combinación de diferentes técnicas cuantitativas en un ambiente de sistemas de información geográfica y sensores remotos, para la identificación de áreas prioritarias de recarga hídrica en la Unidad de Manejo Forestal Zacatlán, Puebla. El estudio se constituyó de tres componentes de investigación: (1) Análisis retrospectivo (1986-2010), actual y perspectivo (2010-2030) de cambios de uso de la tierra y riesgo de deforestación; (2) Identificación de áreas con aptitud para proveer servicios ambientales...
Palavras-chave: Cambio de uso de la tierra; Riesgo de deforestación; Recarga de acuíferos; Evaluación multicriterio; Regresión logística; Land use change; Deforestation risk; Aquifer recharge; Multicriteria evaluation; Logistic regression; Forestal; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2248

Diseño de un sistema silvícola para conservación natural activa.
Provedor de dados: 32
Autores: Rodríguez Camarillo, María Guadalupe.
El presente trabajo se llevo a cabo en una propiedad privada de índole forestal dedicada a la producción maderable persistente, de la parte de la Sierra Occidental de Jalisco, México conocido como La Bufa. Se realizó un diseño basado en regímenes silvícolas completos para diferentes escenarios, aplicables en bosques de pinos mezclados que tienen por finalidad mover la estructura del rodal actual a una estructura cercana a silvestre o completamente natural, que tenga cualidades propias para albergar los valores que motivan la tarea de la conservación natural. Los predios forestales de la sierra jalisciense cuentan con historial de manejo bien documentado, al menos desde 1940, y además tienen una situación biológica propicia para la conservación y se ha...
Palavras-chave: Regímenes silvícolas; Conservación natural; Manejo de paisaje; Escenarios; Silvicultural regimes; Natural conservation; Landscape management; Scenario; Botánica; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/615

Sucesión de entomofauna cadavérica utilizando como biomodelo Cerdo Blanco, Sus scrofa L.
Provedor de dados: 32
Autores: Flores Pérez, Leonardo Roberto.
La entomología forense es la disciplina que estudia a los insectos y otros artrópodos  que acuden a los cadáveres y que aportan información útil en investigaciones policiales  y judiciales, siendo la contribución más importante la estimación del intervalo  postmortem, el cual se basa en la tasa de desarrollo de determinada especie de insecto  (sobre todo díptero) y en los patrones de sucesión de insectos sarcosaprófagos en un  cuerpo en descomposición. Al existir objeciones éticas y morales al uso de cadáveres  humanos como modelos de estudios para el conocimiento de dichos insectos, se hace  inevitable el empleo de animales que permitan determinar la composición de insectos;  siendo el cerdo doméstico, el animal que presenta más semejanzas en el proceso...
Tipo: Tesis
Palavras-chave: Entomología forense; Intervalo postmortem; Sucesión de insectos; Dípteros; Coleópteros; Doctorado; Entomología y Acarología; Forensic entomology; Postmortem interval; Insect succession; Coleopterans.
Ano: 2009
URL: http://hdl.handle.net/10521/1397

La flora y vegetación ruderal de Malinalco, Estado de México.
Provedor de dados: 32
Autores: Martínez de la Cruz, Isabel.
La vegetación arvense y ruderal de México contribuye sustancialmente a la riqueza de especies en México. En los últimos años, sobre todo desde la apertura del comercio con regiones vecinas y lejanas, ha cobrado interés el tema de las plantas exóticas invasoras, debido a su impacto actual y potencial sobre la conservación y las actividades agropecuarias. Existe poca información a nivel nacional concerniente a las plantas vasculares que se desarrollan en ambientes modificados, en particular del hábitat ruderal. Este trabajo tiene el objetivo de contribuir al conocimiento de la vegetación ruderal de una región en el límite entre tipos de clima (templado y tropical) y reinos florísticos (Holártico y Neotropical), a través del análisis de la composición...
Palavras-chave: Vegetación ruderal; Especies nativas y exóticas; Características biológicas; Composición biogeográfica; Relaciones florísticas; Ruderal vegetation; Native and exotic species; Biological characteristic; Biogeographic composition; Floristic relationships; Maestría; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/143

Estructura poblacional y dinámica de plántulas del cactus columnar Neobuxbaumia mezcalaensis (Bravo) Backeberg en la Cañada del Zopilote, Guerrero
Provedor de dados: 32
Autores: Nova Muñoz, Elizabeth.
El análisis de la estructura poblacional de una especie proporciona información sobre los procesos naturales y factores ambientales a que cada uno de sus estadios de desarrollo ha estado sujeto a través del tiempo. Dicha información es necesaria para diseñar estrategias para la utilización y conservación de la especie. El presente trabajo tuvo como objetivo analizar la estructura poblacional y demografía de plántulas de Neobuxbaumia mezcalaensis en tres parcelas de observación de 50 x 50 m (2500 m2) establecidas en la Cañada del Zopilote, Guerrero. Se registraron todos los individuos de N. mezcalaensis, se les midió su diámetro a la altura del pecho, su altura total y se ubicaron por sus coordenadas X y Y. Se utilizó el índice de Ripley para determinar el...
Palavras-chave: Índice de Ripley; Patrón de Distribución Espacial; Patrón de Correlación Espacial; Crecimiento en altura; Tasas de Supervivencia; Causas de Mortalidad; Ripley´s Index; Spatial Distribution Pattern; Spatial Correlation Pattern; Height Growth; Survival rates; Mortality Causes; Maestría; Forestal.
Ano: 2010
URL: http://hdl.handle.net/10521/138

Estructura del bosque y arquitectura de brinzales de Abies religiosa en Tlaxco, Tlaxcala.
Provedor de dados: 32
Autores: Bautista Sampayo, Carolina.
Se realizó un estudio de estructura y arquitectura de brinzales en bosques de Abies religiosa y Pinus patula en la región de Tlaxco, Tlaxcala. La estructura fue enfocada a la composición de especies y distribución diamétrica en dos localidades de Abies religiosa con historias de manejo contrastantes en términos de aprovechamientos comerciales. San José el Manantial (SJM) está sujeto a Manejo Forestal persistente a través de cortas de selección; mientras que el área estudiada en el Ejido de Mariano Matamoros (EMM) ha estado excluido al aprovechamiento maderable regulado por más de 30 años. Se identificaron 15 especies en las dos localidades. El mayor valor índice del valor de importancia  relativa (IVIR) fue para A. religiosa, seguido por Salix paradoxa...
Palavras-chave: Forestal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2104

Green area loss in San Juan&amp;#8217;s inner-ring suburban neighborhoods: a multidisciplinary approach to analyzing green/gray area dynamics
Provedor de dados: 7
Autores: Ramos-Santiago, Luis E.; The Florida State University, Department of Urban &amp; Regional Planning; ler12@my.fsu.edu; Villanueva-Cubero, Luis; University of Puerto Rico, Department of Natural Sciences; luis.villanuevacubero@upr.edu; Santiago-Acevedo, Luis E.; University of Puerto Rico, Graduate School of Planning; santiago.luis47@gmail.com; Rodriguez-Melendez, Yasha N.; Centro de Estudios Avanzados y del Caribe; yasha.rodriguez@yahoo.com.
The loss of green areas and vegetation in suburban neighborhoods poses short- and long-term consequences associated with environmental changes and socioeconomic decline that can propel such developments to an unsustainable state. We summarize an interdisciplinary investigation aimed at identifying the drivers of green area loss, green cover loss, and quantifying the impact on three inner-ring suburban neighborhoods located along the Rio Piedras watershed in San Juan, Puerto Rico. An inductive approach to social-ecological research was undertaken because it provides a flexible platform for interdisciplinary collaboration on this complex and dynamic subject. The three developments selected for the study were constructed in the mid-20th century under...
Tipo: Peer-Reviewed Reports
Palavras-chave: Green area loss; Inner-ring suburbs; Land-use science; Neighborhood decline; Puerto Rico; Social-ecological; Sustainability; Urban dynamics; Urban planning.
Ano: 2014

Сравнительный анализ структуры таксоцена донных диатомовых (Bacіllarіophyta) в районах с разным уровнем техногенного загрязнения (Черное море, Крым)
Provedor de dados: 13
Autores: Петров, А. Н.; Неврова, Е. Л.
С применением алгоритмов многомерной статистики проведен сравнительный анализ особенностей структуры таксоценов донных диатомовых в двух районах юго-западного Крыма – бухтах Ласпи и Севастопольская, донные отложения которых различаются по уровню содержания ряда тяжелых металлов, хлорорганических соединений и нефтяных углеводородов. По результатам кластерного и ординационного анализа для каждого из районов выделены таксоценотические комплексы и внутрикомплексные группировки диатомовых, для которых выявлены наиболее значимые индикационные виды. Межкомплексные отличия в структурной организации таксоценов выражены в большей степени, и, вероятно, вызваны разной реакцией дискриминаторных видов, вносящих определяющий вклад в эти различия, к высокому уровню...
Tipo: Journal Contribution
Palavras-chave: Диатомовые водоросли; Bacillariophyta.; Структура таксоцена; Индикаторы; Многомерный статистический анализ; Тяжелые металлы; Хлорорганические соединения; Черное море; Diatom algae; Taxocenе structure; Indicators; Multivariate statistical analysis; Heavy metals; Chlorine-organic compounds; Black Sea Indicators Heavy metals Heavy metals http://aims.fao.org/aos/agrovoc/c_2223.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/57

Étude expérimentale de la turbulence dans les zones à forts courants et de son impact sur les hydroliennes
Provedor de dados: 5
Autores: Ikhennicheu, Maria.
French waters have a strong potential for tidal turbines applications. In these areas of strong currents, intense velocity fluctuations are observed in the water column. They ultimately come from variations in seabed bathymetry and can have a strong impact on tidal turbine energy production and fatigue. In order to understand the turbulent structures generation in the wake of obstacles and to build a data base for future numerical studies, the Alderney Race conditions are reproduced experimentally, in a wave and current tank, in Froude similitude and with a Reynolds number as high as possible. In this study, real bathymetric variations are represented using canonical elements : a cube, a cylinder, an inclined plane or a combination of all three. Cases with...
Tipo: Text
Palavras-chave: Turbulence; Essais expérimentaux; Hydroliennes; Obstacles; Sillage; PIV; LDV; POD; Turbulence; Experimental trials; Tidal turbines; Obstacles; Wake; PIV; LDV; POD.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70177/68193.pdf

Heterogeneous energetic pathways and carbon sources on deep eastern Mediterranean cold seep communities
Provedor de dados: 5
Autores: Carlier, Antoine; Ritt, Benedicte; Rodrigues, Clara F.; Sarrazin, Jozee; Olu, Karine; Grall, Jacques; Clavier, Jacques.
Cold seep communities in the Mediterranean Sea have only been discovered two decades ago, and their trophic ecology has been the subject of very few studies. We investigated the benthic food web of two deep chemosynthesis-based ecosystems on the Napoli and Amsterdam mud volcanoes (MVs) in the eastern Mediterranean Sea (similar to 2,000 m depth). Seeping methane has been detected at the surface of both MVs during pioneering cruises and has been hypothesised to be assimilated by benthic fauna as observed in other oceans' margins. Given the extreme oligotrophic character of the eastern Mediterranean Sea, we a priori expected that chemosynthetic food sources, especially methane-derived carbon (MDC), played a major trophic role in these deep seep communities...
Tipo: Text
Palavras-chave: Gulf of Mexico; Anaerobic methane oxidation; Stable isotope analysis; Sea hydrothermal vents; Food web structure; Kazan mud volcano; Florida escarpment; Trophic relationships; Benthic communauties; Lamellibrachia SP.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00016/12684/9633.pdf

Flux de quantité de mouvement à l'interface air-mer : approche théorique du couplage entre turbulence et vagues de vent
Provedor de dados: 5
Autores: Ayet, Alex.
Despite numerous works, the causal link between wind and waves is still a controversial subject. This is due, among others, to the multi-scale nature of a realistic ocean surface and to wave breaking, which changes its topology. In this thesis, such problems are studied from a theoretical perspective, using a phenomenological model linking the spectral and averaged properties of wall-bounded turbulence through the geometry attached eddies.The first part of the thesis revisits this phenomenological model by questioning its underlying assumptions and, in particular, reveals inconsistencies in the models used for the energy redistribution between turbulence components (the Rotta model). The phenomenological model is then used to study the coupling between...
Tipo: Text
Palavras-chave: Flux de quantité de mouvement; Turbulence proche de paroi; Budgets spectraux; Vagues de vent; Génération de vagues; Interactions air-mer; Momentum flux; Wall-bounded turbulence; Spectral budgets; Wind-waves; Wave generation; Airsea interactions.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00692/80427/83563.pdf

Démarche qualité et différenciation des produits en aquaculture
Provedor de dados: 5
Autores: Paquotte, Philippe.
In spite of its young age, aquaculture is now an activity subject to competition just like any other activity in the agri-food sector. The differences in environmental conditions give comparative advantages to operations located in certain sites, but the intensification of production methods tends to reduce the impact of this natural variation. It is for this reason that aquaculture must seek sources of competitiveness in the quality of its products, which is not limited to just freshness or taste and includes meeting the increasing demand for diversity. A quality process requires knowing how to assess modifications in product characteristics with respect to environmental conditions and culture techniques and should allow producers and consumers to clearly...
Tipo: Text
Palavras-chave: SEM.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-4054.pdf

Croissance de la dorade, Pagellus Centrodontus DELAROCHE
Provedor de dados: 5
Autores: Gueguen, Jacques.
Although it does not reach the large tonnages of some Nordic gadidae, nor the high flows of so-called "noble" fish such as hake or sole, sea bream, Pagellus centrodontus Delaroche, occupies an important place in French wet-fishing. Among traditional demersal species of the Gulf of Gascony taken in the widest sense, which is to say including the sea beds of northern Spain and the southern Celtic shelf, it is in fourth place from the point of view of total intake value. Only hake, angler and sole have larger total value. The tonnage that it represents for French ports on the Atlantic was 3,600 tonnes in 1955; it came close to 5,800 tonnes in 1959 and has stayed steady at about 5,200 tonnes for the last few years. A close look at the overall statistics shows...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-3176.pdf

Carbonate "clumped" isotope signatures in aragonitic scleractinian and calcitic gorgonian deep-sea corals
Provedor de dados: 5
Autores: Kimball, Justine; Eagle, Robert; Dunbar, Robert.
Deep-sea corals are a potentially valuable archive of the temperature and ocean chemistry of intermediate and deep waters. Living in near-constant temperature, salinity, and pH and having amongst the slowest calcification rates observed in carbonate-precipitating biological organisms, deep-sea corals can provide valuable constraints on processes driving mineral equilibrium and disequilibrium isotope signatures. Here we report new data to further develop "clumped" isotopes as a paleothermometer in deep-sea corals as well as to investigate mineral-specific, taxon-specific, and growth-rate-related effects. Carbonate clumped isotope thermometry is based on measurements of the abundance of the doubly substituted isotopologue (COO2)-C-13-O-18-O-16 in carbonate...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00369/48042/72992.pdf

Report of the Working Group on Mixed Fish-eries Advice for the North Sea (WGMIXFISH-NS). 20-24 May 2013 ICES Headquarters, Copenhagen
Provedor de dados: 5
Autores: ICES.
The ICES’ Working Group on Mixed Fisheries Advice for the North Sea [WGMIXFISH-NS] (Chair: Steven Holmes (UK)) met at ICES HQ, 20-24 May 2013 to apply mixed fisheries forecasts to the draft North Sea single species advice formed by WGNSSK 2013.  The meeting has produced a North Sea Mixed Fisheries Advice sheet and included lines showing mixed fisheries scenario outcomes in the single species advice sheets (for those stocks considered) for consideration by the ACOM advice drafting group. The North Sea Mixed Fisheries Annex is a separate document with minor updates from last year.  The mixed fisheries runs followed the approach used by ICES; management plan where it exists and MSY approach otherwise. The species considered here as part of the demersal mixed...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00166/27688/25881.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; Résultats des stations nationales. Année 1999
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Cornette, Florence; Claude, Serge; Palvadeau, Hubert; Robert, Stéphane; Vercelli, Catherine; Chabirand, Jean-michel; D'Amico, Florence.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in February, June, September and December (late November in 1999). This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. Based on REMORA results, generally tallied with professional observations, and with comparison to previous years, 1999 exhibited mortality in adults (23%) and poor growth in both adults (63.0 g in late November) and...
Tipo: Text
Palavras-chave: Polydora Quality Growth Mortality Crassosirea gigas Pacific cupped oyster France REMORA; Polydora Qualité Croissance Mortalité Crassosirea gigas Huître creuse France REMORA.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1634.pdf

Modelling spatio-temporal patterns of fish community size structure across the northern Mediterranean Sea: an analysis combining MEDITS survey data with environmental and anthropogenic drivers
Provedor de dados: 5
Autores: Bitetto, Isabella; Romagnoni, Giovanni; Adamidou, Angeliki; Certain, Gregoire; Di Lorenzo, Manfredi; Donnaloia, Marilena; Lembo, Giuseppe; Maiorano, Porzia; Milisenda, Giacomo; Musumeci, Claudia; Ordines, Francesc; Pesci, Paola; Peristeraki, Panagiota; Pesic, Ana; Sartor, Paolo; Spedicato, Maria Teresa.
The state of marine systems subject to natural or anthropogenic impacts can be generally summarized by suites of ecological indicators carefully selected to avoid redundancy. Length-based indicators capture the status of fish community structure, fulfilling the Marine Strategy Framework Directive (MSFD) requirement for Descriptor 3 (status of commercial fish species). Although the MSFD recommends the development of regional indicators, a comparison among alternative length-based indicators is so far missing for the Mediterranean Sea. Using principal component analysis and dynamic factor analysis, we identified the most effective subset of length-based indicators, whether or not based on maximum length. Indicator trends and time series of fishing effort and...
Tipo: Text
Palavras-chave: Demersal fish community; Size structure indicators; Geographical sub-area; Marine Strategy Framework Directive; Dynamic factor analysis; Redundancy analysis.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00599/71148/69466.pdf

Morpho-sédimentologie des sites naturels littoraux colonisés par l’Hirondelle de rivage (Riparia riparia)
Provedor de dados: 5
Autores: Fournier, Jerome; Corbeau, Alexandre; Le Mao, Patrick.
Motpho-sedimentology of coastal natural sites colonized by Sand Martin (Riparia riparia). The Sand Martin or Bank Swallow Riparia riparia retums annually to a same site to establish a colony. These sites are natural or anthropogenic origin but are still subject to permanent changes. The species is characterized by its ability to dig tunnels in which it carries out its reproductive cycle. Several authors have attempted to identify the criteria used by the swallows to choose a favourable site to the installation of a colony. Among the many parameters that can help explain the location of colonies, morpho-sedimentary settings have been poorly documented. Among abiotic factors, the composition of the soil particles seems to play an important role in the depth...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00383/49472/49958.pdf

REMONOR : résultats 2005. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: 5
Autores: Mary, Charlotte; Pien, S; Blin, J.l.; Ropert, Michel.
The regional monitoring network REMONOR, relying on the experience of IFREMER's REMORA national network, each year assesses the mortality, growth and quality for two age classes ("adults" = 2 years and "juveniles" = 1 year) of cup oysters, distributed among various farm sites in the main oyster farming sectors of Lower Normandy.  This network, led in collaboration by LERN (Environment Resources Laboratory) and SMEL (Coastline Installations Public-Private Entity), this year welcomes a new farm site in Veules les Roses, in Seine Maritime (76), bringing to 18 the total number of monitored sites. For operational reasons, a reduced monitoring protocol was conducted in 2005 on this last farm site, which will not take on the network's standardised protocol until...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2212.pdf

A uniform, quality controlled Surface Ocean CO2 Atlas (SOCAT)
Provedor de dados: 5
Autores: Pfeil, B.; Olsen, A.; Bakker, D. C. E.; Hankin, S.; Koyuk, H.; Kozyr, A.; Malczyk, J.; Manke, A.; Metzl, N.; Sabine, C. L.; Akl, J.; Alin, S. R.; Bates, N.; Bellerby, R. G. J.; Borges, A.; Boutin, J.; Brown, P. J.; Cai, W. -j.; Chavez, F. P.; Chen, A.; Cosca, C.; Fassbender, A. J.; Feely, R. A.; Gonzalez-davila, M.; Goyet, C.; Hales, B.; Hardman-mountford, N.; Heinze, C.; Hood, M.; Hoppema, M.; Hunt, C. W.; Hydes, D.; Ishii, M.; Johannessen, T.; Jones, S. D.; Key, R. M.; Koertzinger, A.; Landschuetzer, P.; Lauvset, S. K.; Lefevre, N.; Lenton, A.; Lourantou, A.; Merlivat, L.; Midorikawa, T.; Mintrop, L.; Miyazaki, C.; Murata, A.; Nakadate, A.; Nakano, Y.; Nakaoka, S.; Nojiri, Y.; Omar, A. M.; Padin, X. A.; Park, G. -h.; Paterson, K.; Perez, Fiz F; Pierrot, D.; Poisson, A.; Rios, A. F.; Santana-casiano, J. M.; Salisbury, J.; Sarma, V. V. S. S.; Schlitzer, R.; Schneider, B.; Schuster, U.; Sieger, R.; Skjelvan, I.; Steinhoff, T.; Suzuki, T.; Takahashi, T.; Tedesco, K.; Telszewski, M.; Thomas, H.; Tilbrook, B.; Tjiputra, J.; Vandemark, D.; Veness, T.; Wanninkhof, R.; Watson, A. J.; Weiss, R.; Wong, C. S.; Yoshikawa-inoue, H.
A well-documented, publicly available, global data set of surface ocean carbon dioxide (CO2) parameters has been called for by international groups for nearly two decades. The Surface Ocean CO2 Atlas (SOCAT) project was initiated by the international marine carbon science community in 2007 with the aim of providing a comprehensive, publicly available, regularly updated, global data set of marine surface CO2, which had been subject to quality control (QC). Many additional CO2 data, not yet made public via the Carbon Dioxide Information Analysis Center (CDIAC), were retrieved from data originators, public websites and other data centres. All data were put in a uniform format following a strict protocol. Quality control was carried out according to clearly...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00383/49450/49923.pdf

Premières observations sur la morphologie et les processus sédimentaires récents de l'Éventail celtique
Provedor de dados: 5
Autores: Auffret, Gérard-andré; Zaragosi, S; Voisset, Michel; Droz, Laurence; Loubrieu, Benoit; Pelleau, Pascal; Savoye, R; Bourillet, Jean-francois; Baltzer, Agness; Bourquin, S; Dennielou, Bernard; Coutelle, Alain; Weber, N; Floch, Gilbert.
During the SEDIFAN 1 cruise we surveyed the bathymetry and the acoustic properties of the surface sediment of the Celtic Deep Sea Fan. We also collected Kullenberg cores in order to study recent sedimentary processes. From the bathymetry survey it is relatively easy to recognize the main areas of modern fan. The upper fan included a large sedimentary ridge which constitutes the right levee of the prominent meandering Whittard valley. After its confluence with the Shamrock valley the course of the Whittard valley is abruptly deflected to the south. At a short distance to the south the valley divides into two upper-fan channels, the Celtic channel to the west being the deeper one. This point constitutes the centre of a radiating pattern which is developed on...
Tipo: Text
Palavras-chave: Paléoclimat; Turbidité; Sédiment; Quaternaire; Eventail profond; Palaeoclimate; Turbidity; Sediment; Quaternary; Deep sea fan.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-525.pdf

An example of cooperation between scientist and managers : The Meditearranean Lagoon Network (Languedoc-Roussillon, France)
Provedor de dados: 5
Autores: Laugier, Thierry; Malet, Nathalie; Munaron, Dominique; Derolez, Valerie; Fiandrino, Annie; Barral, Marc; Moragues, Laurent; Mazouni, Nabila; Graille, Chantal.
The poster presents the approach that led to the construction of a network of cooperation between managers and scientists for coastal lagoon management in the region of Languedoc-Roussillon, its architecture and modus operandi, its achievements and developments over time.  At the end of the ninety’s, eutrophication and lack of knowledge were identified as issues to enhance the management of coastal lagoons on the Mediterranean coast of France. In 2000, in the region of Languedoc-Roussillon, scientists (Ifremer) and institutional managers (Regional Council of Languedoc-Roussillon and Water Agency Rhône-Méditerranée &amp; Corse) joined their forces in building a network to address this need. The core of this network consists of an operational tool for the...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00002/11343/8101.pdf

Comparison of two tagging techniques for Sarpa salpa: external attachment and intraperitoneal. implantation
Provedor de dados: 5
Autores: Jadot, C.
For a given species in a particular environment, the success and the harmlessness of transmitter attachment appear to be highly specific. As no information was available for the tagging of the strepie, Sarpa salpa, a suitability study of attachment techniques was needed. Two types of transmitter attachments were investigated: (1) externally, placed on the back of the fish below the dorsal fin by means of two threads sutured through the dorsal musculature, and (2) internally, in the peritoneal cavity. Twenty-five fish were monitored over a 14-d period for survival, surgical healing, injury occurrence and post-tagging behaviour. Even though we observed a 100% survival rate for both groups, with no noticeable buoyancy or swimming alteration, findings from...
Tipo: Text
Palavras-chave: Sarpa salpa; Sparidae; Attachement externe; Implantation intrapéritonéale; Télémétrie; Sarpa salpa; Sparidae; External attachment; Intraperitoneal implantation; Telemetry.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43242/42971.pdf

Channel and North Sea ray stock assessment in a data limited framework
Provedor de dados: 5
Autores: Amelot, Morgane; Bastleer, Jurgen; Foucher, Eric; Girardin, Raphael; Marchal, Paul; Poos, Jan Jaap; Sys, Klaas.
Rajidae stocks (Raja clavata, Raja brachyura, Raja montagui, Raja microocellata, Leucoraja naevus and Raja undulata) in the English Channel and North Sea (ICES divisions 3a, 4 and 7d) are actually managed as a complex (“skates and rays”) and subject to a single TAC. TAC advices from the ICES are based on scientific survey indices trends from each species. Rajidae catches are mainly bycatch from flatfish fisheries such are sole (Solea solea) and plaice (Pleuronectes platessa) fisheries. Furthermore, because of their top predator position as well as their life history, Rajidae are species sensitive to overfishing. These different factors have led to a revision in stock assessment methods. ICES classified Rajidae as category 3 data limited stocks. The lack of...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00620/73220/72433.pdf

Elevage du bar américain Roccus Saxatilis (Walbaum, 1792) - I. Méthodes utilisées
Provedor de dados: 5
Autores: Delor, Anne.
Willing to acquire the fish culture techniques necessary to tackle the issues raised by marine fish culture, we undertook training in the U.S.A. and chose as our research subject the American Striped Bass (Roccus saxatilis WALB, 1972) whose semi-intensive culture is booming (l). To start with, we will recall some biological data. It is a Perciforme belonging to the Serranidae family, abounding on the Atlantic coast of the United-States. It is found all the way from Canada to the North of Florida, which shows a great eurythermy. Moreover, it is an extremely euryhalin fish: it lives either in the ocean, along the coasts, or in brackish waters, in bays and estuaries, and can swim upstream to areas where salinity is almost null. Adult individuals of the same...
Tipo: Text
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-6672.pdf

Du concept de santé à la détermination d’intervalles de référence chez l’huître creuse Crassostrea gigas
Provedor de dados: 5
Autores: Francois, Cyrille.
Of interest of everyone, health is not an easy concept to figure out. Although there is no universal definition of health, its various uses and meanings allow us to specify its biological, psychic and social dimensions. In animal health, the biological dimension remains the most studied, there is therefore no consensual definition of international animal health. So how to understand the health of marine shellfish? A living being can be functionally described in physiopathology by monitoring biomarkers under laboratory conditions. In men and many animals, "normal" biomarker values have been proposed; these have been determined by carrying out measurements or observations in samples of healthy populations, the rigorous selection of these populations and...
Tipo: Text
Palavras-chave: Santé; Huître; Valeurs de référence; Filtration; Consommation d’oxygène; Health; Oyster; Reference values; Clearance rate; Oxygen consumption rate.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00610/72189/70970.pdf

Relative importance of different mecanisms underlying fish response to climate change
Provedor de dados: 5
Autores: Genu, Mathieu.
Climate change affects marine systems stability, in particular temperature increase induces a shift of the  fish  spatial  distribution  polewards.  Phenology  of  ecological  processes,  such  as  reproduction,  migration  seasons,  and  species  physiology  subject  to  temperature  increase  are  also  expected  to change. The ecosystem response to climate change implying all these processes remains unknown and difficult to estimate due to the numerous interactions between species. To better understand the relative  importance  of  the  different  processes  affected  by  climate  change,  we  use  the  multispecies model OSMOSE applied to the eastern English Channel and we simulated  two climate scenarios for 2040-2049  from    IPCC  (B1  and  A2). ...
Tipo: Text
Palavras-chave: Réchauffement océanique; OSMOSE; Processus multiples; Projections du GIEC; Ocean warming; OSMOSE; Multiple processes; IPCC projection.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00643/75513/76367.pdf

La pêche de loisir dans le golfe du Morbihan
Provedor de dados: 5
Autores: Boude, Jp; Lesueur, M; Daures, Fabienne; Guyader, Olivier; Drouot, Bruno.
Leisure fishing, open to everyone and without a license, is a leisure activity in which many people are interested. Conversely to other harvesting activities such as fresh water fishing and hunting, it has practically not been studied until now (Appéré et Bonnieux, 2002). This study, dedicated to practice of leisure fishing at sea in the Gulf of Morbihan, set itself several objectives: - collect and assemble the available knowledge on regulations and practice of maritime leisure fishing - assess the amount of harvesting of certain recreational types of fishing and the economic impact generated by this activity, - highlight the problems of existing or potential cohabitations among the various users of the space and resources in the Gulf. - develop an...
Tipo: Text
Palavras-chave: Economic evaluation; Shellfish; Clams; Morbihan bay; Brittany; Leisure fishing; Cout de transport; Palourdes; Interactions; Conflits d'usage; Evaluation economique; Impact sur la ressource; Reglementation; Peche en bateau; Peche de plaisance; Peche à pied; Peche de loisir; Activités de peche; Golfe du morbihan.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2244.pdf

Les pêcheries et le milieu marin dans le secteur méditerranéen de la république Arabe Unie
Provedor de dados: 5
Autores: Gorgy, Samy.
Before 1958, hydrology and halieutic research in Egypt, was mainly restricted to the brackish lakes of the delta and the surroundings of Alexandria. They resulted in a number of publications gathered under the title "The fishing grounds near Alexandria" in the Notes and Memories of the Institute of Alexandria. The marine sector, coastal and off-shore, of Mediterranean Egypt stayed practically ignored by oceanographers. However, the increasing food needs of the United Arab Republic increased the interest of national public powers and scientists for the marine sector which should provide large quantities of food, fish and other marine animals, to the Republic's market. This is the reason why, in 1957, during the International Fishing Gear Congress of...
Tipo: Text
Ano: 1966
URL: http://archimer.ifremer.fr/doc/1966/publication-3967.pdf

La mer monte : impacts et stratégies. Scénarios à 2100 et trajectoires d’adaptation
Provedor de dados: 5
Autores: Lacroix, Denis; Rocle, Nicolas.
In October 2019, AllEnvi [the French National Alliance for Environmental Research] published the findings of a foresight study on the environmental, social and economic consequences of rising sea levels — one of the direct manifestations of climate change — in the years to 2100 and the way we might anticipate these consequences and prepare for them. That exercise, based on the scenario-building method, enabled eight general scenarios and three territorial focuses to be developed. Denis Lacroix and Nicolas Rocle outline its main lessons here. After first going into the framing, methodology and context involved, they present the scenarios in three family groups (‘Coastal adaptation’, ‘Denial’ and ‘Fragmented World’), together with the territorial focuses...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00636/74791/75178.pdf

Long-term changes in sand-bottom macrofauna along the coast of Provence (northwest Mediterranean Sea)
Provedor de dados: 5
Autores: Masse, Hl.
At a time when there is a great deal of talk of the degradation of the coastal environment and of biodiversity being threatened, we felt it would be of interest to sample the macrofauna of five sites at five metres depth in well sorted fine sand at a thirty-year interval (1966-1996), using the same techniques. Four seasonal samplings provided comparative data at each site on the species richness (S), density (N) and biomass (B). The S values are comparable and even on the increase at two stations. Nevertheless, we observed a general tendency towards decline in the relative abundance of the crustacean group. From the quantitative point of view (N and B), the changes observed would appear to result from the impact of clearly identifiable human pressure, such...
Tipo: Text
Palavras-chave: Méditerranée; Macrofaune des sables; Variations; Long-terme; Mediterranean; Sand-macrofauna; Changes; Long-term.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43572/44053.pdf

La petite pêche en Aquitaine - le bassin d'Arcachon - Halieutique, socio-économie, usages et réglementations. 1999-2000
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Leaute, Jean-pierre; Trouillet, Brice; Laborde, Jean-louis; Goumy, Cécilia; Prouzet, Patrick; Grandpierre, Alde; Lissardy, Muriel; Corlay, Jean-pierre.
Introduction : Intra-basin fishing is not grasped as well, partly because of a lack of distinction between pure professional fishing units and conchological units and on the other hand because of the large amount of ships. Poorly adapted codification of the equipment found in the basin is also contributing to this lack of information. Studies on the subject do exist, but the elements necessary to publish notices are not always gathered, this is leading to the proposal of a geographical systemic analysis on the basin. The steps that are being taken are complementing the development of the Geographical Information System already in place in the basin since 1993 through DEL at the Arcachon Ifremer as well as the PECOSUDE European study ¿ caractéristiques des...
Tipo: Text
Palavras-chave: Uses; Regulation; Economy; Halieutics; Basin of Arcachon; Fishing; Usages; Réglementation; Economie; Halieutique; Bassin d'Arcachon; Pêche.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/rapport-1660.pdf

Exploration multi-échelle de la circulation côtière dans le golfe de Gascogne
Provedor de dados: 5
Autores: Lazure, Pascal.
The Bay of Biscay continental shelf is the site of a variety of physical processes, none of which are permanently dominant. The variability of the circulation from daily to interannual scales has been explored through both modelling and observation. Emphasis will be placed on one of the peculiarities of the Atlantic Plateau: the importance of river flows whose catchment areas represent half of the metropolitan territory. The mixing of these fresh waters with marine waters forms plumes that oscillate according to winds and general circulation. Increasingly refined modelling and a growing number of observations now make it possible to describe their fate and their extension as far as the English Channel. The general circulation on the shelf is weak and...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00610/72176/70951.pdf

(CS)-C-137 inventory in sediment near the Rhone mouth: role played by different sources
Provedor de dados: 5
Autores: Charmasson, S.
The low tidal range of the Mediterranean Sea and the high sediment load of the Rhone induce the formation of an important submarine delta. The Cs-137 inventory in sediment on a 480 km(2) area near the Rhone mouth reached 19.6 TBq in 1990. The spatial distribution of both sediment accumulation rates and (CS)-C-137 concentrations in this area confirm the existence of a spatially well-delimited zone, i.e. the prodelta, where both parameters are the highest. Thus, 40% of the total amount of Cs-137 stored in this 480 km(2) area was found within the prodelta (30 km(2)) in the close vicinity of the river mouth. This attests to the efficiency of the (CS)-C-137 trapping by the prodelta sediments. A study on the part the different (CS)-C-137 sources in the...
Tipo: Text
Palavras-chave: Rhône; Méditerranée; Radioéléments; Sédiment; Inventaire; Rhone; Mediterranean Sea; Radionuclides; Sediment; Inventory.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43266/42997.pdf

Diversification des techniques de pêche artisanales en corse. Pêche de la crevette Pandalide plesionika edwards II. Technique - prospection - étude biologique - commercialisation
Provedor de dados: 5
Autores: Guennegan, Yvon.
INTRODUCTION : « The fishing industry is still flourishing » but in Corsica as elsewhere, it has already been declining; sea floors are getting depleted. Several vessels have laid up. Where are we in 1989? Corsica fishing is strongly seasonal. The bulk of the activity takes place from spring time to early fall and focuses on bottom fish and sea crayfish. Three types of fishing can be identified: - Trawl fishing on the eastern coast plateau, (16 trawlers). - Trammel fishing to catch rock fish and sea crayfish on the western coast of the island (300 low power and tonnage ships, i.e. 50 KW and 4TJB). - Pond fishing (a few small units). Total catching amounts to roughly 1 000 tons. The fishing fleet is very dispersed along 1 080 km of coast and sometimes faces...
Tipo: Text
Palavras-chave: Marketing; Biological study; Fish shrimp; Prospection; Technique; Pandalide plesionika edwards II; Corsica; Artisanal fishings.
Ano: 1990
URL: https://archimer.ifremer.fr/doc/1990/rapport-1759.pdf

Questions sur la dynamique de l'exploitation halieutique
Provedor de dados: 5
Autores: Laloe, Francis; Rey, Hélène; Durand, Jean-louis.
Whether what is at stake is land-use management and stabilising the economy of the shoreline areas for a good number of developed countries or involvement in food self-sufficiency, contributing to the balance of payments and stabilising employment for developing countries, in every instance, the economic and/or political importance of fisheries management as a business sector is far from being marginal in most of the countries concerned. Thus, from the moment the question of the inexhaustibility of the resources was posed, the desire to manage them manifested itself by the emergence of social demand, peculiarly at around the same time as research, due to the involvement of the researchers in the decision-making bodies of land-use and business management...
Tipo: Text
Palavras-chave: Tropical environment; Artificial reservoir; Methymercury; Mercury; SEM.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/2006/acte-2081.pdf

Estimation des stocks de palourdes Ruditapes decussatus, Ruditapes philippinarum sur l'estran oléronais du bassin de Marennes-Oléron. Juin 2009
Provedor de dados: 5
Autores: Bordeyne, François; Robert, Stephane; Le Moine, Olivier; Leaute, Jean-pierre.
On French coast, Manila clam is a bivalve subject of a large activity recreational and professional hand harvest. Two species are represented in France, European Manila clam Ruditapes decussatus (native) and Japanese Manila clam Ruditapes philippinarum (introduced). Predominance of this last species (more than 90 % of number and biomass), earn them the status of invasive species. Contrary to Arcachon bay, Pont l’Abbé River or Morbihan bay, an estimation campaign of Manila clams stock on Marennes-Oléron bay had never been carried out. The objective of this study: estimate, in number and biomass, the Manila clams stock of two areas. The first affect recreational hand harvest, on Saint-Trojan shore (0.8 km²) whereas the second scopes professional hand...
Tipo: Text
Palavras-chave: Palourde; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oléron.; Manilla clam; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oleron.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52621/53459.pdf

Small-scale morphological and genetic differentiation in the Mediterranean killifish Aphanius fasciatus (Cyprinodontidae) from a coastal brackish-water pond and an adjacent pool in northern Sardinia
Provedor de dados: 5
Autores: Maltagliati, F; Domenici, P; Fosch, Cf; Cossu, P; Casu, M; Castelli, A.
Two samples of Aphanius fasciatus collected in the Pilo pond (northern Sardinia, Italy) and in an adjacent pool of small surface area were analysed morphologically (235 individuals) and genetically (a subsample of 58 individuals). The aims of the present study were (i) to test the hypothesis that different predation pressures may be associated with morphological and/or genetic differences between samples from each habitat and (ii) to assess the level of divergence between the two populations. Morphological analysis was based on the relative size of fins because it has been shown to be associated with predation pressure. The relative caudal fin area (caudal fin area/total body surface) was smaller in specimens from the pool, in both males and females,...
Tipo: Text
Palavras-chave: Morphologie; Taille relative des nageoires; Variation génétique; Divergence de populations; Eaux saumâtres; Morphology; Relative fin size; Genetic variation; RAPDs; Population divergence; Brackish-water habitats.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43291/43026.pdf

Mortalités estivales de l'huître Crassostrea gigas dans le bassin d'Arcachon : facteurs du milieu, aspects biochimiques et histologiques
Provedor de dados: 5
Autores: Maurer, Daniele; Comps, Michel.
Previous pathological studies have not permitted to implicate infectious disease in summer mortalities of oysters Crassostrea gigas, in the Arcachon bay. In 1983, these summer mortalities, occurring mostly among 1 year old oysters, have been the subject of new investigations. In order to establish the causes of mortalities, oysters of the same origin were held in two areas characterized by different prevalence of mortality for 6 months, during which measurements of physiological and biochemical condition and certain histological observations were made. The study has been completed by environmental observations. Different rates of mortality appeared between the two selected areas: 30 %in Taussat in the upper part of the bay, under a continental influence...
Tipo: Text
Palavras-chave: Histology; Biochemistry; Environment; Summer mortality; Crassostrea gigas; Histologie; Biochimie; Environnement; Mortalité estivale; Crassostrea gigas.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-4317.pdf

Incidences des épisodes d'efflorescences de micro algues toxiques sur les écosystèmes et sur les pêcheries de coquillages en baie de Douarnenez
Provedor de dados: 5
Autores: Thebaud, Olivier; Veron, Gerard; Fifas, Spyros.
The commercial fishery for wedge clam, or telline (Donax trunculus) in the bay of Douarnenez in France started in the early 1980ies. During twenty years, the activity has developed, from an opportunistic fishery, into a regular fishing enterprise for 36 fishermen, who derive from it most, if not all, of their revenue. The fishery is nowadays strictly regulated. It is subject to natural variations in the productivity of clam stocks, in relation with meteorological conditions which can strongly affect the stocks.  The bay of Douarnenez has been experiencing regular blooms of harmful algae, both of species leading to shellfish poisoning for human consumption, such as Dinophysis (Diarrhoeic Shellfish Poisoning) and Pseudo-nitzschia (Amnesic Shellfish...
Tipo: Text
Palavras-chave: Temporary fishing ban; Mortality; Economic impact; Fishery; Wedge clam; Donax trunculus; Fermeture temporaire; Mortalité; Impact; Pêcherie; Telline; Donax trunculus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1262.pdf

Essai de classement bathymetrique des formes zooplanctoniques en mediterranee
Provedor de dados: 5
Autores: Casanova, Jean-paul.
Research on the vertical distribution of zooplankton in the western Mediterranean is still rare. With the exception of the Thor's campaigns covering the whole of the two basins, vertical fishing has long remained rare and localised. Nonetheless, for some ten years now the practise has been growing, from combined deep harvests to hydrological reports. It is in this context that the Institute of Maritime Fishing carried out, with the oceanographic ships President Theodore Tissier in 1958 and Thalassa in 1961 and 1963, several series (respectively K, N, and P) of vertical samples, at various levels throughout the western basin, but most especially in the Ligurian-Provençal channel and in the central sector (figure 1) that are the subject of this paper. We...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3146.pdf

L'ostréiculture dans le bassin d'Arcachon et ses rapports avec les variations du milieu
Provedor de dados: 5
Autores: Le Dantec, Jean.
The decline in oyster production over the 1950-1960 decade should be attributed to a problem in nutritional quality of the waters rather than to a decrease in mean salinity. This problem in nutrition was the consequence of difficulties in exchanges between the Atlantic Ocean and the Arcachon Bay following the lengthening of channels, the slow sedimentation in oyster farms after a dry spell and development of Zostera beds in the channels as well as the increase in oyster density in upstream oyster farms and in concessions subject to prolonged emersion. This population increase was due to the anticipation of attacks by predatory fishes, a succession of high spat production, an increase in butterfly oyster stocks (after hard cold spells). Important run-off...
Tipo: Text
Ano: 1962
URL: http://archimer.ifremer.fr/doc/1962/publication-4130.pdf

Investissement a la peche en pays Bigouden
Provedor de dados: 5
Autores: Catanzano, Joseph.
This note is an integral part of research undertaken on investment in fishing in the Bigouden area (maritime district of Guilvinec). Though it can present a few preliminary results, it cannot in any way show the main subject of the work involved. It is here a matter of indicating the amount of investments linked to the construction of fishing units or the purchase of used boats throughout the maritime district of Guilvinec.  It will be able to address successively: I The analysis of construction costs of fishing units meant for various types of fleet (seafaring, coastal trawl, small trades).  ii The existing links between these construction cost differences and the observed changes of the technical characteristics of each of the fishing units. iii Capital...
Tipo: Text
Palavras-chave: SEM.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-2425.pdf

L'emission des gametes chez l'huitre portugaise (Crassostrea Angulata LMK)
Provedor de dados: 5
Autores: His, Edouard.
LE DANTEC (1968), in his research on the ecology and reproduction of the Portuguese oyster in the Arcachon basin, recounts a few experiments involving heat stimulation of genital product emissions. He conducted them in order to confirm his observation in situ, since temperature variations are presumably the most common factor of external stimulation in nature. However, the act of emitting male or female gametes in Crassostrea angulata was not, to our knowledge, the subject of any special study. In a general way, the authors seem to admit that it is possible to extend to the entire Crassostrea SACCO species the results obtained about C. virginica, C. gigas and C. commercialis, mainly by American and Japanese researchers. We wanted to verify it for the...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3144.pdf

Remarques sur quelques cephalopodes mésopelagiques du Golfe de Gascogne
Provedor de dados: 5
Autores: Abbes, Rene.
The teuthological fauna of the Gulf of Gascony is still very imperfectly understood, especially in the pelagic area. The major expeditions have rarely worked east of the line that links the Grand Sole to the reefs of Cape Finisterre. The data that we have available for the region come from independent observations by H. FISCHER and L. JOUBIN (1906) and by L. JOUBIN (1895, 1900, 1920 and 1924). The most important research work is thanks to J. BOUXIN and R. LEGENDRE (1936), who studied very many stomach contents of tunny.  In 1966 and 1967, the Thalassa had the opportunity to conduct 17 deep pelagic catches using an Isaacs-Kidd net, at immersions spaced out between 500 and 1,600 metres. They brought in twelve species of cephalopods: Heteroteuthis dispac...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3138.pdf

Bibliographie der Flussperlmuschel Margaritifera Margaritifera (Linnaeus, 1758) [Mollusca: Pelecypoda]
Provedor de dados: 16
Autores: Jungbluth, J.H.; Coomans, H.E.; Grohs, H.
Bibliography of the freshwater Pearlmussel Margaritifera margaritifera (Linnaeus, 1758) [Mollusca: Pelecypoda] The freshwater pearlmussel, described by Linnaeus as Mya margaritifera is one of the most important molluscs existing. It belongs with only a few congeneric fossil and recent species to the distinct family Margaritiferidae. The distribution of the species is Holarctic (figs. 1-2), being known from western, northern and central Europe, and via Siberia to Japan. In North America it is found at the northeast coast of the United States and East Canada. The habitat requires clean, cold and streaming freshwater. The life cycle of Margaritifera margaritifera and its reproduction are unique within the bivalves (fig. 3). From the fertilized eggs grows a...
Tipo: Article / Letter to the editor
Ano: 1985
URL: http://www.repository.naturalis.nl/record/506336

Het botanisch beheer van natuurreservaten op structuur-oecologische grondslag
Provedor de dados: 16
Autores: Leeuwen, Chr.G. van.
The botanical control of nature reserves based on structure ecology In contrast with previous ideas the human control of nature reserves is nowadays seen as indispensable for the preservation of variety-in space and stability-in-time. Botanical control of nature reserves has for its object the conservation of their various plant communities against alterations coming from the inside and the outside. A second purpose is the enlarging of their internal spatial variety, for the more variety-in-space is present the more varietyin-time can be counteracted. In both cases the cybernetical term “regulation amplifying” is an adequate expression for our activities. The theoretically most difficult problem in modern control is due to its preponderant external...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/528184

Review
Provedor de dados: 16
Autores: Nooteboom, H.P.
This book is sequel to Volume 14A, Tropical Forest Ecosystems, structure and function. Whereas the first volume deals with system ecological aspects such as community organization and processes, the present volume concentrates on biogeographical aspects such as species composition, diversity, and geographical variation. Recent ecological research in the tropical rain forest has greatly extended our understanding of biogeographical patterns on variation in the various groups of organisms and has revealed many of the ecological and evolutionary forces that led to the present patterns of variation. Many important systems of co-evolution between the tropical rain forest ecosystems have also come to light, and the loss of species and related damage is better...
Tipo: Article / Letter to the editor
Ano: 1990
URL: http://www.repository.naturalis.nl/record/524814

Examining the uses of shared data
Provedor de dados: 17
Autores: Heather A. Piwowar; Douglas B. Fridsma.
Does your research area re-use shared datasets?&amp;#xd;&amp;#xa;*   Re-using data has many benefits, including research synergy and efficient resource use&amp;#xd;&amp;#xa;*   Some research areas have tools, communities, and practices which facilitate re-use&amp;#xd;&amp;#xa;*   Identifying these areas will allow us to learn from them, and apply the lessons to areas which underutilize the sharing and re-purposing of scientific data between investigators&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;    Which datasets?&amp;#xd;&amp;#xa;This preliminary analysis examines the re-use of microarray gene expression datasets. Thousands of microarray gene expression datasets have been deposited in publicly available databases. &amp;#xd;&amp;#xa;Many studies reuse this data,...
Tipo: Poster
Palavras-chave: Bioinformatics.
Ano: 2007
URL: http://precedings.nature.com/documents/425/version/3

El efecto de la temporada ciclónica 2005 sobre el fitoplancton de la Bahía de Cienfuegos, Cuba
Provedor de dados: 20
Autores: Moreira, A.; Comas, A.; Seisdedo, M.; Barcia, S.
El fitoplancton es uno de los componentes más abundantes de la biodiversidad de la Bahía de Cienfuegos. Se estudió el impacto de la temporada ciclónica 2005 sobre la composición y abundancia de estos organismos en el período de marzo-octubre. La composición específica de microalgas planctónicas de la bahía en marzo estuvo dominada por diatomeas y dinoflagelados marino-estuarinos como Nitzschia  longissima, Thalassionema nitzschioides y Prorocentrum micans. Al final de la temporada ciclónica, los cambios en la estructura de la comunidad fitoplanctónica fueron drásticos, prácticamente no se registró fitoplancton marino en la bahía. Las microalgas dulciacuícolas de los géneros Chlorella, Monoraphidium, Cyclotella, Aulacoseira, Pseudoanabaena, Planktothrix,...
Tipo: Journal Contribution
Palavras-chave: Aquatic communities; Community composition; Bays; Planktonic algae.
Ano: 2012
URL: http://hdl.handle.net/1834/5699

Hydrologie, sédimentaire et géochimie de l'oued Tinja (Tunisie septentrionale
Provedor de dados: 20
Autores: Ben Gharali, A.; Ouakad, M.; Gueddari, M.
L'oued Tinja relie la garaet Ichkeul à la lagune de Bizerte laquelle communique avec la mer Méditerranée par un long goulet. Les eaux de cet oued dépendent à la fois des apports saisonniers des eaux marine et douce et présente de ce fait, des salinités très fluctuantes. L'important réseau hydrographique associé au plan d'eau de l'Ichkeul (avec un bassin versant très important d'environ 2080 km2) est sujet à de nombreux aménagements hydrauliques, notamment la construction de barrages de retenues d'eau douce. Ces derniers sont susceptibles de perturber les caractéristiques hydrologiques, sédimentologiques et géochimiques du système laguno-lacustre (lagune de Bizerte et garaet Ichkeul) et d'entamer par voie de conséquence sa diversité et sa richesse...
Tipo: Journal Contribution
Palavras-chave: Environmental impact; Geochemistry; Hydrology; Quality; Sediment analysis; Species diversity.
Ano: 2008
URL: http://hdl.handle.net/1834/4270

Seychelles tuna bulletin: first semester 1999
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Spmetimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revi¬sion (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  Purse seiners.  PRINCIPAL POINTS:  The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1999
URL: http://hdl.handle.net/1834/5197

Seychelles tuna bulletin: fourth quarter 1997
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at the SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  Purse seiners. PRINCIPAL POINTS:  The total purse seine tuna catch for the Western...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1998
URL: http://hdl.handle.net/1834/5199

Hydrologie, sédimentologie et géochimie de l'oued tinja  (Tunisie septentrionale)
Provedor de dados: 20
Autores: Ben Garali, A.; Ouakad, M.; Gueddari, M.
L'oued Tinja relie la garaet Ichkeul à la lagune de Bizerte laquelle communique avec la mer Méditerranée par un long goulet. Les eaux de cet oued dépendent à la fois des apports saisonniers des eaux marine et douce et présente de ce fait, des salinités très fluctuantes. L'important réseau hydrographique associé au plan d'eau de l'Ichkeul (avec un bassin versant très important d'environ 2080 km2) est sujet à de nombreux aménagements hydrauliques, notamment la construction de barrages de retenues d'eau douce. Ces derniers sont susceptibles de perturber les caractéristiques hydrologiques, sédimentologiques et géochimiques du système laguno-lacustre (lagune de Bizerte et garaet Ichkeul) et d'entamer par voie de conséquence sa diversité et sa richesse...
Tipo: Journal Contribution
Palavras-chave: Marine sciences; Quality; Species diversity; Geochemistry; Environmental impact; Hydrology; Freshwater lagoons; Sediment analysis.
Ano: 2008
URL: http://hdl.handle.net/1834/4248

Essai d'évaluation de la qualité des eaux de ruissellement du bassin versant de la lagune de Bizerte
Provedor de dados: 20
Autores: Hammami, J.; Brahim, M.; Gueddari, M.
:تقع بحيرة بنزرت في الشمال التونسي وتغذيها عدة أودية تنبع من حوض يمتد على مساحة شاسعة. وتمثل التقلبات المناخية والأنشطة الإقتصادية المتزايدة في السنوات الأخيرة أهم العوامل المؤثرة في هذا الحوض وفي السيول التي تنبع منه في اتجاه البحيرة.  لقد قمنا في شهر فيفري في سنة 2003 باقتـاء عينات من الماء مـن 15 مصـب لتحليلـها ( درجة الحرارة، درجة الحموضة، نسبة الأكسجين، الكلوروفيل والمواد العضوية والمعدنية الأزوتية والفسفورية) قصد دراسة هذه الظاهرة.  وبينت النتائج التي تم الحصول عليها بأن مياه روافد بحيرة بنزرت تتميز عموما بنسبة عالية للأكسجين وبدرجة حموضة عادية إلى مرتفعة نوعا ما. لكن مياه مصب وادي المرازيق وقنيش والذين يقعان بالتوالي في الشمال الغربي والجنوب الشرقي للبحيرة محملا بأكثر نسبة من المواد الأزوتية والفسفورية. تظهر هذه النتيجة واضحة في التحاليل الإحصائية...
Tipo: Journal Contribution
Palavras-chave: Runoff; Anthropogenic factors; Chlorophylls; Physical properties; Water quality; Chemical properties; Nitrogen; Phosphorus; Runoff; Water quality; Chemical properties; Nitrogen; Phosphorus; Anthropogenic factors; Chlorophylls; Physical properties; Http://aims.fao.org/aos/agrovoc/c_35388; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_9754; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_13328.
Ano: 2005
URL: http://hdl.handle.net/1834/1533

Seychelles tuna bulletin: first semester 1999
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Spmetimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revi¬sion (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  Purse seiners.  PRINCIPAL POINTS:  The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1999
URL: http://hdl.handle.net/1834/5197

Seychelles tuna bulletin : third quarter 1996
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners Principal Points - The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Tuna fisheries; Catch statistics.
Ano: 1997
URL: http://hdl.handle.net/1834/5194

Caractérisation hivernale de la lagune de Bizerte
Provedor de dados: 20
Autores: Bejaoui, B.; Ben Charada, R.; Moussa, M.; Ben Hamadou, R.; Harzallah, A.; Chapelle, A.
Ce travail porte sur la caractérisation hivernale de la lagune de Bizerte en se basant sur une campagne de mesures effectuée en janvier 2004. Cette campagne a porté sur 17 stations réparties sur toute la lagune ainsi qu’une station marine de référence. Chaque échantillon a fait l’objet de mesures in-situ (Température, Salinité, Conductivité, Transparence, Acidité et Oxygène dissous) et des analyses au laboratoire (NO3, NO2, NT, PO4, Chlorophylle-a, Phéopigment et MES). Cette étude a montré que la distribution spatiale des paramètres est fortement liée aux apports fluviaux. Contrairement au phosphore minéral, la teneur en azote total montre une variation spatiale importante. L’analyse de la distribution spatiale des nutriments d’une part et de la...
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Hydrobiology; Nitrogen; Nutrients (mineral); Phosphorus; Phytoplankton; Geographical distribution; Nitrogen; Phosphorus; Phytoplankton; Hydrobiology; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_3718.
Ano: 2005
URL: http://hdl.handle.net/1834/3748

Biologie, abondance et cartographie de deux espèces de bivalves : l’huitre perlière &lt;Pinctada radiata&gt; et la coque glauque &lt;Cerastoderma glaucum&gt; dans le golfe de Gabes
Provedor de dados: 20
Autores: Derbali, Abdelkarim.
The pearl oyster Pinctada radiata and the cockle Cerastoderma glaucum are among the most abundant bivalve molluscs in southern Tunisian waters. These species are not currently subject to any investigation despite their important economic value in the world. For this reason, their biological parameters, their spatial distribution and their stock assessment were undertaken in the Gulf of Gabes. The reproductive cycle was studied in relation to variations of the environment parameters. The specimens were collected monthly during one year (2007) in sites of El Kraten and El Jorf (Kerkennah Islands) for the first species and sites of Sidi Mansour and El Hicha (North of Sfax and Gabes) for the second. An intraspecific polymorphism biometric trait for P. radiata...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Biology; Shellfish.
Ano: 2011
URL: http://hdl.handle.net/1834/5404

Essai d’évaluation de la qualite des eaux de ruissellement du bassin versant de la lagune de Bizerte
Provedor de dados: 20
Autores: Hammami, J.; Brahim, M.; Gueddari, M.
La lagune de Bizerte, située en Tunisie nord-orientale, constitue un bassin récepteur d’un réseau hydrographique bien développé. Afin d’apprécier l’impact des facteurs naturels et anthropiques sur les eaux de ruissellement du bassin versant de cette lagune, une campagne de prélèvement d’eau a été effectuée en février 2003 (période de crue) au niveau de la partie aval de quinze cours d’eau, à raison d’un échantillon par cours d’eau. Les échantillons d’eau prélevés ont fait l’objet de mesure in situ des variables physico-chimiques (température, pH et O2 dissous) et d’analyses au laboratoire de la chlorophylle a et des différentes formes organiques et inorganiques dissoutes de l’azote et du phosphore. Les résultats obtenus ont montré que les eaux de...
Tipo: Journal Contribution
Palavras-chave: Anthropogenic factors; Chemical properties; Chlorophylls; Nitrogen; Phosphorus; Physical properties; Pollution monitoring; Runoff; Water quality; Chemical properties; Nitrogen; Phosphorus; Runoff; Water quality; Chlorophylls; Anthropogenic factors; Physical properties; Http://aims.fao.org/aos/agrovoc/c_9754; Http://aims.fao.org/aos/agrovoc/c_5192; Http://aims.fao.org/aos/agrovoc/c_5804; Http://aims.fao.org/aos/agrovoc/c_35388; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_13328.
Ano: 2005
URL: http://hdl.handle.net/1834/3747

Seychelles tuna bulletin : second quarter 1996
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners Principal Points - The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1996
URL: http://hdl.handle.net/1834/5190

Mangrove vegetation structure, dynamics and regeneration
Provedor de dados: 27
Autores: Dahdouh-Guebas, F.
The present PhD dissertation is composed of fourteen papers, preceded by a general introduction and followed by an epilogue that explains the entire research framework, including the links between the different case-studies, the local and global applicability of the results and the relevance of the work in the framework of development co-operation. The bulk of the research was carried out in four sites in Kenya and Sri Lanka: Gazi Bay and Mida Creek in Kenya, and Unawatuna-Galle and Pambala-Chilaw in Sri Lanka. After a revision of the often controversial issue of the floral composition of mangroves in Sri Lanka (SW coast), followed by a synthesis of image attributes in the interpretation of aerial photographs in Kenya and Sri Lanka, a series of...
Tipo: Info:eu-repo/semantics/doctoralThesis
Palavras-chave: Mangroves Asia; Sri Lanka ISW; Kenya; Gazi Bay ISW; Kenya; Mida Creek.
Ano: 2001
URL: http://www.vliz.be/imisdocs/publications/226691.pdf

Eocene sequence stratigraphic siliciclastic sedimentation model in the Southern Bight, North Sea
Provedor de dados: 27
Autores: Jacobs, P.
The Belgian sector of the Southern Bight of the North Sea stands as a copy-book example of a shallow marine siliciclastic intracratonic sedimentary basin with a ramp type margin setting, characterized by low subsidence rates, relative tectonic quiescence, and a low gradient relief. Clastic sediment supply resulting of erosion by constant southern Alpine uplift, origins from a proto-Rhine-Meuse-Scheldt river drainage system, gradually infilling the basin. The mainly deltaic sedimentation system gives rise to (offshore and onshore) Tertiary onlapping and shallowing upward sedimentary series of metric to decametric thickness with a dip to the NNE of less than 5%.To identify the offshore seismostratigraphical units introduced on basis of 16,000 km of high...
Tipo: Info:eu-repo/semantics/article
Ano: 1994
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2601

Synthesis: prospects for organic agriculture in a global context
Provedor de dados: 21
Autores: Halberg, Niels; Alrøe, Hugo Fjelsted; Kristensen, Erik Steen.
As discussed by Knudsen et al. (Chapter 1) there is a rapid development in the global food chains towards increased trade and competition over long distances and very large corporate retail chains taking control over large parts of food trade. This global competition leads to a downward price pressure and demands for large volumes, standardisation, specialisation and high production efficiency and productivity for agricultural systems all over the world.   This industrialisation of the agricultural sector leads to increased externalities in terms of emissions of nutrients and pesticides, loss of biodiversity and reduced animal welfare. Moreover, even though food production has increased significantly over the last decades and most countries engage in the...
Tipo: Book chapter
Palavras-chave: "Organics" in general.
Ano: 2006
URL: http://orgprints.org/6277/1/6277.pdf

The diversity of livestock systems and definition of animal welfare (2nd NAHWOA Workshop)
Provedor de dados: 21
content:   Part A: Livestock in organic farming: role and research methodologies  Part B: The diversity of organic livestock systems – Austria and Spain  Part C: Organic livestock production standards  Part D: Organic livestock production and animal welfare    The theme of the 2nd NAHWOA Workshop was "Diversity of livestock systems and definition of animal welfare". The diversity of livestock systems within the European Conmmunity area has become particularly clear during the development of the common organic livestock production standards, in the form of EU Regulation 1804/ 1999. The Workshop heard several interesting papers on the subject, including an account of first-hand, field visit experience of the DEHESA farming system and of an olive farm with...
Tipo: Proceedings
Palavras-chave: Production systems; Health and welfare.
Ano: 2000
URL: http://orgprints.org/874/1/hovi%2D2001%2D2ndNAHWOA%2Dproceedings.pdf

Prediction of cereal feed value using spectroscopy and chemometrics
Provedor de dados: 21
Autores: Jørgensen, Johannes Ravn; Gislum, René.
Feed value in form of FEsv (Feed unit / kg dry matter, for piglets) and FEso (Feed unit / kg dry matter, for sows), EDOM (Enzyme Degradable Organic Matter) and EDOMi (Enzyme Degradable Organic Matter, Ileum) is used in the feed evaluation system for pigs. Analysis of feed value have highlighted that there is a significant variation between varieties as well as due to an environmental variation between regions and the harvest year. The chemical analysis is, however, time-consuming and costly, and it is therefore desirable to have a rapid and less expensive method, which makes it possible to carry out more analyses in-situ.    Near infra-red reflection spectroscopy (NIRS) is appropriate as a standard analysis of dry matter, total N and starch in grains,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Animal husbandry; Crop husbandry.
Ano: 2009
URL: http://orgprints.org/17000/1/17000.pdf

'All models are wrong - but some are useful' - a report from an EWRS workshop on modelling weed population dynamics
Provedor de dados: 21
Autores: Rasmussen, I.A.; Bastiaans, L.; Holst, N.; Grundy, A.; Melander, B.
A three-day workshop on modelling weed population dynamics partially sponsored by the European Weed Research Society (EWRS) was held in October 2006 at Research Centre Flakkebjerg. 24 participants attended the workshop from 8 countries, mainly Europe and USA. The aim of the workshop was to gather some of those active and interested in the field, i.e. most of the participants had either published papers on weed population dynamic models or had a model under development. By gathering these people, it was our hope to learn from each other and possibly benefit by increasing the knowledge and use of each other's work. The EWRS saw the workshop as an opportunity to interconnect some of the work going on in (at least) three working groups: Weed Seed Germination...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2007
URL: http://orgprints.org/11348/1/WeedDynamics_keynote_Rasmussen_rev2.doc

Organic Viticulture in Europe
Provedor de dados: 21
Autores: Willer, Helga; Häseli, Andreas; Levite, Dominique; Tamm, Lucius.
Introduction  Organic agriculture is a thriving sector in Europe, and in some countries 10 % of the agricultural area is organic. Not so, however, for organic viticulture: the percentage of organic viticulture land compared to all vineyards is lower than for organic agriculture. This is due to several constraints in the sector of production techniques, in marketing, legislation and state support.    Material and Methods  So far no official data on the current status of organic viticulture in Europe exist. Even though most countries in the Europe collate data on their land under organic management, information on land use patterns is not always available. For this paper several information sources were used including various conference proceedings on the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Viticulture.
Ano: 2002
URL: http://orgprints.org/2586/1/willer%2Det%2Dal%2D2002%2Dviticulture%2Dabstract.doc

THE EFFECTS OF ENVIRONMENTAL DEGRADATION ON WOMEN'S AND CHILDREN'S TIME ALLOCATION DECISIONS IN MALAWI: IMPACT ON CHILDREN'S WELFARE
Provedor de dados: 31
Autores: Nankhuni,   Flora J.; Findeis,   Jill L.
The majority of the Malawi people is rural (85%) and lives primarily on subsistence farming (NSO 2001).  More than 90% of households collect and use fuel wood as their main source of cooking energy (NEC 2001; NSO 2000).  However, between 1990 and 2000, Malawi experienced an average annual deforestation rate of 2.4% that was significantly higher than both Africa's average deforestation rate of 0.78%, and the world's average deforestation rate of 0.22% (UN FAO 2001).  Malawi is also reported as one of the countries that will experience water stress by 2025 (PRB 2002).  The rapid depletion of natural resources can have significant consequences for the quality of people's lives.  Since Malawian women and children are primarily responsible for rural...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/22117

Examining Point-Nonpoint Trading Ratios for Acid Mine Drainage Remediation with a Spatial-Temporal Optimization Model
Provedor de dados: 31
Autores: Zhao,   Xiaobing; Fletcher,   Jerald J.
A trading ratio is required for water quality trading that involves nonpoint sources to compensate for the difficulty of determining nonpoint loadings, the stochastic characteristics of nonpoint loadings, and the uncertainty inherent in nonpoint source pollution control strategies. Compensating for risk and uncertainty is one of the primary justifications that a trading ratio greater than one is commonly considered. However, the appropriate specific value of a trading ratio remains unclear because of qualitative differences between point and nonpoint sources. This study addresses a growing concern with the analytical underpinnings of point/nonpoint trading ratios in water quality trading programs. This paper considers a basic spatial-temporal optimal...
Tipo: Conference Paper or Presentation
Palavras-chave: Point-nonpoint water quality trading; Trading ratio; Acid mine drainage; Spatial-temporal optimization; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/19231

TOURISM DEVELOPMENTAS A SUSTAINABLE RURAL ACTIVITY
Provedor de dados: 31
Autores: Csete,   Maria.
The subject of the analysis is the Lake Tisza region. This region was chosen because it is rich in natural values coupled with economic and social problems and a significant Romani population, making it suitable for the complex evaluation of interdependences.  I am investigating the contribution of development to sustainability, taking into account the local connections and interactions between sustainability, climate change and tourism. The purpose of this paper is to highlight the possible role of tourism in sustainable rural development and outline an adaptation portfolio accordingly.  A questionnaire-based survey was carried out from June to December 2008 to highlight the major uncertainties in the practical implementation of local sustainability in...
Tipo: Journal Article
Palavras-chave: Sustainability; Climate change; Tourism development; Sustainable rural activities; Local adaptation portfolio; Fenntarthatóság; Klímaváltozás; Turizmusfejlesztés; Fenntartható vidéki tevékenység; Helyi alkalmazkodási portfolió; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2010
URL: http://purl.umn.edu/99213

A VIDÉKFEJLESZTÉS ÚJ KUTATÁSI PROGRAMJA
Provedor de dados: 31
Autores: Borsos,   Janos; Nabradi,   Andras.
A Debreceni Egyetem Agrárgazdasági és Vidékfejlesztési Karának szellemi arcéle eleve regionális beállítottságú,  nemcsak földrajzi elhelyezkedése miatt, hanem alapítása szerint is célzottan Kelet-Magyarország térségének központi tudományos műhelye, Kárpát-medencei vonzáskörzetével együtt ilyen módon in-tegrátora kell legyen annak a progressziónak, amit egyszerűen vidékfejlesztési diszciplínának nevezünk. Az eddigi gazdasági vonulatok szerint a vidéknek defi-niált itteni térségek egyik sajnálatos közös vonása az egyre táguló társadalmi kü-lönbségekben jelenik meg, alapprobléma a gazdagság és szegénység közötti sza-kadék mélyülése. Ez az állapot ellenkezik az emberi toleranciával, s gátja min-den életminőséget javító, jóléti társadalmi törekvésnek. A régió...
Tipo: Journal Article
Palavras-chave: Társadalmi különbségek; Eszak-Magyarország; Új társadalmi modellek; Mint válaszok - social differences; North-Hungary; New social models as answers; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2005
URL: http://purl.umn.edu/54301

Sensitive Product Treatment in Agricultural Trade Negotiations
Provedor de dados: 31
Autores: Durand-Morat,   Alvaro; Wailes,   Eric J.; Sharp,   Misti.
The fact that trade, and especially agricultural trade, remains far from free is puzzling, since the superiority of free trade receives overwhelming support among economists (Gawande and Krishna, 2003; Rodrik, 1994). International trade scholars have devoted significant resources to forecasting the impact of trade policy reforms (for a survey of these studies see Congressional Budget Office, 2005), and their findings are relevant inputs for officials negotiating a trade agreement as well as for politicians in charge of ratifying it. The perceived gains and losses attached to different outcomes have been identified as a significant factor shifting the outcome of a trade agreement negotiation (McMillan, 1990). Less well-known are the factors that would...
Tipo: Conference Paper or Presentation
Palavras-chave: Trade negotiations; Agricultural trade; Free trade agreements; Political economy; Agricultural and Food Policy; International Relations/Trade; Political Economy; F59; Q17.
Ano: 2011
URL: http://purl.umn.edu/103835

Structural Transformation in the Pig Sector in an Adjusting Vietnam Market: A Preliminary Investigation of Supply-side Changes
Provedor de dados: 31
Autores: Tisdell,   Clement A.
This abstract summarises this article which relies on available official statistics to outline salient features of Vietnam’s pig industry and changes in its structure occurring between 1996 and 2006. However, coverage of the latter aspect is limited by the availability of data. The focus of the article is on primary supplies of the quantity of pork. Between 1996 and 2006, Vietnam’s volume of production of pork more than doubled and its availability of pork per capita (from its own stock) approximately doubled. This was an outstanding achievement. In 2006, however, growth rates in pork supplies and its availability per capita slowed. Both increased pig numbers and rising pork yields contributed to the increased supply of pork in Vietnam between 1996 and...
Tipo: Working or Discussion Paper
Palavras-chave: Vietnam; Pig industry; Household pig farms; Trends in pork production; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/90619

O COMÉRCIO BRASILEIRO DE CARNE SUÍNA E O POTENCIAL EXPORTADOR MEDIANTE ELIMINAÇÃO DE BARREIRAS EXTERNAS
Provedor de dados: 31
Autores: Rubin,   Luciane da Silva; Ilha,   Adayr da Silva.
Este estudo analisa o panorama e o potencial exportador do setor brasileiro de carne suína frente à suposição de futuros acordos de liberalização multilateral ou por integração econômica entre o Brasil e determinados blocos/países. Para analisar o panorama e o potencial exportador do setor de carne suína, desenvolvem-se quatro generalizações metodológicas: o potencial importador dos blocos/países, o cálculo da evolução do Índice de Vantagem Revelada das Exportações do Brasil e de seus principais concorrentes no interior de cada bloco, pesquisa bibliográfica das principais barreiras existentes e cálculo do Índice de Orientação Regional. Os resultados, quanto ao potencial importador, indicam que a União Européia (UE) e a Comunidade dos Estados Independentes...
Tipo: Conference Paper or Presentation
Palavras-chave: Comércio potencial; Barreiras comerciais; Carne suína; Commerce potential; Commercial barriers; Pork; International Relations/Trade; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/110070

AN ANALYSIS OF STATISTICAL ERRORS IN CONTINGENT VALUATION SURVEYS
Provedor de dados: 31
Autores: Dietz,   Brian.
Environmental economists using contingent valuation (CV) surveys are often interested in estimating the population willingness to pay (WTP) for some intervention from a sample of individuals randomly drawn from some population of interest.  These surveys collect information on bids or WTP amounts and various demographic and socioeconomic characteristics about the respondents that is used to estimate descriptive statistics (such as mean or median WTP) or regression equations (such as bid or WTP functions).  Statistical errors can occur when either the framework from which the sample was drawn is ignored or when the sampled elements are used to incorrectly infer relationships for a target.  These errors will often cause biased WTP estimates, although the...
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2001
URL: http://purl.umn.edu/20462

IMPACTS OF PESTICIDE REGULATION ON THE CALIFORNIA STRAWBERRY INDUSTRY
Provedor de dados: 31
Autores: Carter,   Colin A.; Chalfant,   James A.; Goodhue,   Rachael E.; Groves,   Kiara; Simon,   Leo K.
Environmental regulation of agriculture is becoming increasingly important, and growers are increasingly concerned about the effects of regulations on their profitability.  Regulations governing the use of a pesticide affect its economic value.  Further, growers often face a choice among pesticide alternatives, each with its own set of regulatory restrictions.  In this environment, the introduction of a new regulation can have complex effects on growers'’ profit-maximizing pesticide choices.  Buffer zones and regional emissions caps mean that pesticide choices can have important spatial components.  Our paper presents an optimization model that incorporates spatial considerations at the field and regional level.  We apply our model to fumigant choice by...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/20166

DOMESTIC SUPPORT TO AGRICULTURE IN THE EUROPEAN UNION AND THE UNITED STATES: POLICY DEVELOPMENTS SINCE 1996
Provedor de dados: 31
Autores: Gopinath,   Munisamy; Mullen,   Kathleen; Gulati,   Ashok.
Prior to the 1994 Uruguay Round Agreement on Agriculture, many developed countries supported production largely through support prices and government procurement. Since mid-1990s these countries have increasingly favored income support or direct payments over price support policies. In this study, we outline the farm policy changes in the European Union, EU, and the United States, US, since 1996 and compare their levels of support under various policies. The producer support estimates for the EU are more than twice that of the US, although the value of EU agricultural production is only 30% more than the US production value. In the EU, reductions in the intervention (support) prices for cereals, oilseeds and beef sector have been compensated by increased...
Tipo: Report
Palavras-chave: Agricultural price supports; Agricultural and Food Policy.
Ano: 2004
URL: http://purl.umn.edu/60452

NON-STARCH POLYSACCHARIDES’ INFLUENCE ON DIGESTIBILITY AND NUTRIENTS AVAILABILITY FOR PIGS DIETS IN DIFFERENT PRODUCTION STAGES
Provedor de dados: 22
Autores: Oliveira, Aparecida Costa; Martins, Terezinha Domiciano Dantas; Souza, Carla Giselly de; Pavlak, Maira Suzana Dürrewald; Almeida, Jorge Luiz Santos de; Pinto, Alex Ferreira.
O milho e a soja são os maiores constituintes das rações para suínos, entretanto, há uma constante busca pela utilização de alimentos com fonte de polissacarídeos não amiláceos (PNAs) para suínos nas diferentes fases de produção. O objetivo desta revisão é fornecer subsídios para melhorar o conhecimento sobre os PNAs, em relação a sua influência sobre a digestibilidade e disponibilidade dos nutrientes das dietas para suínos em diferentes fases de criação. Sua inclusão na nutrição de suínos têm demonstrado efeitos positivos na produtividade, pela redução dos custos, por atuar positivamente na fisiologia ao melhorar a secreção enzimática e a digestibilidade na fase inicial, por atuar como fonte energética na fase de crescimento, pelos efeitos positivos sobre...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternative food; Fiber; Intestinal health; Metabolism.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15451

Human taeniasis - cattle and swine cysticercosis complex II - Cattle and swine cysticercosis
Provedor de dados: 195
Autores: Côrtes, José de Angelis.
Cysticercosis has been included among the most important known zoonosis, not only because it causes damages to animals' health and consequent economic losses but also due to the severity of the disease in the human population. It is caused by the larval stage (metacestodes) of Taenia solium and Taenia saginata.Based on the interactive relationship existing among the adult and larval stages of these parasites and their hosts, this paper reviews the natural history and prevention of the disease. The subject is approached so as to include the taeniasis-cysticercosis complex transmission mechanisms both from animals to man (taeniasis), as presented in a previous article, and from man to animals (cysticercosis). Several aspects are emphasized: a) the role of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Taeniasis-cysticercosis complex; Animal cysticercosis; Human taeniasis; Cysticercus cellulosae; And cysticercus bovis complexo teníase-cisticercose; Cisticercose animal; Cisticercose humana; Cysticercus cellulosae; Cysticercus bovis.
Ano: 2000
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3369

การเปลี่ยนแปลงประชากรของแมลงศัตรูข้าวที่สำคัญในจังหวัดเชียงราย จากผลกระทบของสภาวะภูมิอากาศที่เปลี่ยนแปลง
Provedor de dados: 106
Autores: Kornsiri Srinil; Nootjarin Jungkhun; Tarapron Yuenyong; Kuntera Kanta; Antika Tonmit; Netnapa Pumhan.
Study about the accordance of rice insect pests from the light trap and the research data of insects in the rice seed of San-pah-tawng 1 (weak) and that of SuphanBuri 1 (resistant) was conducted from the year 2011 to 2013 at the Chiang Rai Rice Research Center. It’s found that the rice insect pests entrapped by the light trap being increased from the year 2007 to 2010. That in May, 2011, 4,779  zigzag leafhoppers were mostly found; in March, 2012, 19,248 whitebacked planthoppers were mostly found and; in May, 2013, 19,047 zigzag leafhoppers were mostly found. In the paddy field, rice insect pests were found in the rice seed of San-pah-tawng 1 more than that of Suphan Buri 1. In the In-season rice of the year 2011, the White backed planthoppers were mostly...
Tipo: PhysicalObject
Palavras-chave: Whitebacked planthoppers; Brown planthoppers; Light trap; Climatic change; Rice; Sanpatong 1 variety; Suphanburi variety; Weak variety; Resistant variety; Insect pest; Natural enemies; Survey; Damage; Population dynamics; Chiangrai province; เพลี้ยกระโดดหลังขาว; เพลี้ยกระโดดสีน้ำตาล; ข้าว; พันธุ์สันป่าตอง 1; พันธุ์สุพรรณบุรี 1; พันธุ์อ่อนแอ; พันธุ์ต้านทาน; การสำรวจแมลงศัตรูพืช; กับดักแสงไฟ; การเปลี่ยนแปลงสภาพภูมิอากาศ; ภาวะโลกร้อน; การทำลายของแมลงศัตรูพืช; การประเมินความเสียหาย; การทำลายของแมลงศัตรูพืช; จ.เชียงราย.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5696

การใช้เทคโนโลยีที่เหมาะสมในการลดต้นทุนการผลิตข้าวพื้นที่จังหวัดสระบุรี
Provedor de dados: 106
Autores: Wiphawadee Chamnan; Peerapon Rattana; Piya Anuson.
Rice production cost reduction model of village community project was conducted in 2013, at Moo 2, Huaikamin sub district, Nong Khae district, Saraburi province. It aims to provide farmer to obtain knowledge and understanding the process of reducing the cost of rice production and developing the capacity of farmers in sustainable rice production. There are 4 activities 1) Preparing the learning plot of 20 rais with growing rice; Suphan buri 1, RD31 and RD47. 2) Promoting conversion to farmers area of 300 rais with growing rice Suphan buri 1, RD31, RD41 and RD47. 3) Establishment and development of organic fertilizer and green manure seed production farmer group. 4) Establishment and development of management of rice pests and warning systems. There were 33...
Tipo: PhysicalObject
Palavras-chave: Farmer; Rice production technology; Technology adoption; Rice production cost; Cost reduction; Extension; Rice pest; Saraburi province; ข้าว; เกษตรกร; การผลิตข้าว; เทคโนโลยีการผลิต; การยอมรับเทคโนโลยี; การแลกเปลี่ยนเรียนรู้; การส่งเสริมของภาครัฐ; การบริหารจัดการ; ศักยภาพการผลิต; การจัดการศัตรูข้าว; จ.สระบุรี.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5661

Edmund Davall to James Edward Smith [unfinished/unsent]
Provedor de dados: 24
Autores: Davall, Edmund.
[It is probable that this letter was never sent as it bears no date, valediction, signature or address, appears unfinished, and from references in other letters to a long letter started in January but not sent.] Currently suffering poor physical and mental health after discovering that a large part of his herbarium has been spoiled by damp though his recent acquisitions escaped, including wild specimen of 'Daphne alpina' Haller "Historia stirpium" no.1026. Reminiscences at length on his life, including his first introduction to botany move to Switzerland following father's death, introduction to Smith and increasing passion for the subject, limitations imposed by decreased patrimony, becoming a recluse, and marrying despite intending to remain single; has...
Tipo: Document
Ano: 2023
URL: http://linnean-online.org/62957/1/JES-COR-14-73_001.tif

Structure of the periphytic algae associated with a floating macrophyte in an open lake on the upper Paraná river floodplain, Brazil - doi: 10.4025/actascibiolsci.v35i4.18663
Provedor de dados: 3
Autores: Biolo, Stefania; Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP); Rodrigues, Liliana; Universidade Estadual de Maringá.
We aimed to access the knowledge of the structure of the periphytic algae community on a floating substrate, the macrophyte Ricciocarpus natans (L.) Corda, during two hydrological periods in a connected environment at the Paraná river floodplain. Attached algal was removed from the substrate with the aid of a soft-bristled brush and distilled water jets and was fixed immediately for qualitative and quantitative analysis. The total richness of the periphytic algae was 188 taxa. February showed the highest species richness (154 taxa), while total species density exhibited an inverse pattern, with the highest values occurring in June (273.4 103ind. cm-2). Bacillariophyceae comprised the largest fraction of density, which was reflected by the abundance of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.00.00.00-6 periphyton; Community structure; Natural substrate; Ricciocarpus natans 2.05.00.00-9.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/18663

Caracterização morfométrica e suas implicações na limnologia de lagoas do Pantanal Norte - DOI: 10.4025/actascibiolsci.v30i2.3628
Provedor de dados: 3
Autores: Fantin-Cruz, Ibraim; UFMT; Loverde-Oliveira, Simoni; UFMT; Girard, Pierre; UFMT.
O presente trabalho tem como objetivo descrever as características morfométricas de sete lagoas do Pantanal Norte e discutir suas implicações na limnologia deste ambientes. Os parâmetros utilizados foram: área, volume, profundidades máxima, média e relativa, perímetro, índices de desenvolvimento de volume e perímetro, comprimento e largura máxima. De modo geral, as maiorias das lagoas são rasas com pequenas profundidades relativas, assim menos propensas a estratificações térmicas e mais susceptíveis a ação dos ventos que atua como agente na resuspensão de matéria e mistura da coluna de água. Apresentam margens pouco irregulares e forma da bacia côncava que são menos influenciadas pelos processos de a erosão e sedimentação. Variações temporais na...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas morfometria; Lagoas; Limnologia; Planície de inundação; Pantanal Norte 2.05.00.00-9    Ecologia.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/3628

Extracellular production of avicelase by the thermophilic soil bacterium Bacillus sp. SMIA-2
Provedor de dados: 3
Autores: Oliveira, Luciana Ribeiro Coutinho; Universidade Estadual do Norte Fluminense; Barbosa, João Batista; Universidade Estadual do Norte Fluminense; Martins, Meire Lelis Leal; Universidade Estadual do Norte Fluminense; Martins, Marco Antonio; Universidade Estadual do Norte Fluminense.
Nowadays, the isolation of new bacterial strains that produce enzymes with novel properties is a subject of great relevance to the scientific community. This study, in order to search for producers of new cellulase strains, investigated the avicelase production by thermophilic Bacillus sp. strain SMIA-2. The best avicelase activity was observed in a culture medium containing 0.5% (w v-1) avicel and 0.5% (w v-1) corn steep liquor with initial pH 7.5-8.0 incubated at 50oC. When avicel was replaced in the medium by the treated sugarcane bagasse (0.5%, w v-1) the avicelase activity levels were not affected. Studies on the avicelase characterization revealed that the optimum pH of the enzyme was found to be 8.5 and the enzyme retained more than 80% of its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.07.03.00-9 Avicelase; Corn steep liquor; Sugarcane bagasse; Bacillus sp Tecnologia de Alimentos.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17827

Estudos genéticos sôbre o milho tunicata
Provedor de dados: 43
Autores: Brieger,F. G.
The study of pod corn seems still of much importance from different points of view. The phylogenetical importance of the tunicate factor as a wild type relic gene has been recently discussed in much detail by MANGELSDORF and REEVES (1939), and by BRIEGER (1943, 1944a e b). Selection experiments have shown that the pleiotropic effect of the Tu factor can be modified very extensively (BRIEGER 1944a) and some of the forms thus obtained permitt comparison of male and female inflorescences in corn and related grasses. A detailed discussion of the botanical aspect shall be given shortly. The genetic apect, finally, is the subject of the present publication. Pod corn has been obtained twice: São Paulo Pod Corn and Bolivia Pod Corn. The former came from one half...
Tipo: Info:eu-repo/semantics/article
Ano: 1945
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100007

Estudo comparativo entre métodos de contrôle quantitativo da produção leiteira
Provedor de dados: 43
Autores: Jardim,W. R.; Peixoto,A. M.; Silveira F°,S.; Gomes,F. Pimentel.
This paper deals with the estimation of milk production by means of weekly, biweekly, bimonthly observations and also by method known as 6-5-8, where one observation is taken at the 6th week of lactation, another at 5th month and a third one at the 8th month. The data studied were obtained from 72 lactations of the Holstein Friesian breed of the "Escola Superior de Agricultura "Luiz de Queiroz" (Piracicaba), S. Paulo, Brazil), being 6 calvings on each month of year and also 12 first calvings, 12 second calvings, and so on, up to the sixth. The authors criticize the use of "maximum error" to be found in papers dealing with this subject, and also the use of mean deviation. The former is completely supersed and unadvisable and latter, although equivalent, to...
Tipo: Info:eu-repo/semantics/article
Ano: 1956
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761956000100009

Hereditariedade da homeose
Provedor de dados: 43
Autores: Piza Junior,S. de Toledo.
A preliminary account on the normal development of the imaginai discs in holometabolic Insects is made to serve as an introduction to the study of the hereditary homoeosis. Several facts and experimental data furnished specially by the students of Drosophila are brought here in searching for a more adequate explanation of this highly interesting phenomenon. The results obtained from the investigations of different homoeotic mutants are analysed in order to test Goldschmidt's theory of homoeosis. Critical examination of the basis on which this theory was elaborated are equally made. As a result from an extensive theoretical consideration of the matter and a long discussion of the most recent papers on this subject the present writer concludes that the...
Tipo: Info:eu-repo/semantics/article
Ano: 1944
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761944000100006

Estrategias de reproducción social : el aporte de mujeres protagonistas de trayectos de escolarización para personas adultas en Gran Mendoza
Provedor de dados: 122
Autores: Molina, María Mercedes.
La presente investigación se ubica en el terreno constituido por el cruce de dos vertientes temáticas: la sociología de la educación y los estudios sobre condiciones de existencia de las distintas clases que conforman la estructura social. Dentro de este campo, se abordó la relación entre estrategias de reproducción social y estrategias de escolarización de mujeres residentes en Gran Mendoza. Se han retomado herramientas conceptuales propias de un enfoque de género, pues permiten focalizar el análisis sobre las desiguales relaciones de poder que se instauran entre varones y mujeres al interior de la unidad familiar, a la hora de implementar mecanismos que aseguren la supervivencia del grupo. El objetivo general de la investigación ha consistido en analizar...
Tipo: Tesis
Palavras-chave: SOCIOLOGÍA DE LA EDUCACIÓN; CLASES SOCIALES; ESTRUCTURA SOCIAL; ESCOLARIZACIÓN; FAMILIA; MUJERES; RELACIONES DE PODER; EDUCACIÓN DE ADULTOS; EDUCACIÓN DE LA MUJER; DESOCUPACIÓN; ARGENTINA; MENDOZA [PROVINCIA].
Ano: 2009
URL: http://hdl.handle.net/10469/1384

Analyse des petits pelagiques, sardine et anchois, dans le golfe de Gascogne
Provedor de dados: 5
Autores: Coiffec, Gaelle; Duhamel, Erwan; Biseau, Alain; Danzart, Marc.
Since 1993 the yearly amounts of sardine landings for the Bay of Biscay fishing ports have experienced a constant increase (10,000 tonnes in 1993); on that account sardine is the first species landed in the fishing ports of the Bay of Biscay (15,000 tonnes in 2003). It is sold 0.54 € / kg (constant price over ten years) which means a 8,100 k€ turnover in 2003 and the 12th rank in value landed in the fishing ports of Bay of Biscay. Though anchovy landings have decreased over the last ten years, especially since 2001, this species occupies the 3rd rank of the highest landings (7,300 tonnes) of the Atlantic shoreline in 2003.The decrease of anchovy landings over the last ten years may account for the high increase of its constant sale price of 1.5 € / kg from...
Tipo: Text
Palavras-chave: Purse seiner; Midwater pair  trawler; Sardine; Anchovy; Pelagic; Bay of Biscay; Recrutement; Senneur; Chalutier pelagique; Bolincheur; Sardine; Anchois; Pelagique; Golge de Gascogne.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2287.pdf

Partnering for Farmland Biodiversity Conservation: Civil Society and Farmers Working Hand-In-Hand
Provedor de dados: 21
Autores: Znaor, Darko.
Agriculture has been Macedonia’s backbone for centuries and has always played an important role in Macedonian society. By maintaining landscape and biodiversity through the ages, Macedonian farmers have been the true guardians of an important national treasure – biodiversity. They have been the invisible hand managing landscapes, agricultural habitats and enabling farm-linked biodiversity to provide a range of ecosystem services. Pollination; pest, disease, flood and fire regulation; preservation of genetic resources; and the provision of food, fibre, natural medicine, pharmaceuticals and appealing landscapes are only a few of these services.      Agricultural biodiversity under threat  Many of the Macedonian landscapes and habitats that are important for...
Tipo: Book chapter
Palavras-chave: Farm economics Food security; Food quality and human health Social aspects Networks and ownership Biodiversity and ecosystem services Policy environments and social economy Education; Extension and communication Regulation.
Ano: 2012
URL: http://orgprints.org/26378/1/FINAL%20PUBLICATION%2C%20UK%20version.pdf

Impact des facteurs anthropiques et naturels sur le fonctionnement de quelques populations halieutiques
Provedor de dados: 5
Autores: Prouzet, Patrick.
Researcher since 1974 at CNEXO (National Centre for Exploration of the Oceans), then at IFREMER (French Institute for Exploitation of the Sea), I have at the same time brought to the work of researching the dynamics of exploited ichthyologic populations actions for enhanced improvement and transfer of knowledge to help managers and stakeholders administer these resources and restore them if needed.  This activity led me to play a double role: that of the expert who is asked to set up "a truth judgment" on a given subject or according to a specific question, and that of the scientist faced with the judgment of his peers who strives not to go against his knowledge (i.e., that which is subject to the criticism of the scientific community). This change of...
Tipo: Text
Palavras-chave: Ecosystem; Ichthyology; Populations dynamics; Halieutics.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2167.pdf

Etude des nourriceries de la baie de Seine orientale et de l'estuaire de la Seine. Synthese des connaissances.  Identification d'une nourricerie en estuaire de Seine. Analyse de la fonctionnalite de l'estuaire comme nourricerie
Provedor de dados: 5
Autores: Morin, Jocelyne; Riou, Philippe; Lemoine, Michel; Le Pape, Olivier; Bessineton, Christophe; Vedieu, Christophe; Simon, Serge.
The study carried out from 1995 to 1997 within the framework of "Le Havre" harbour extension project, concerned the description of halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and in the Seine estuary. The main objective was to describe the specific and demographic composition of marine populations as well as their spatio-temporal distribution, and then to assess the biologic and halieutic role of this area. The study also included a research about the dietary needs of fish juveniles living in the estuary. Methodology Five series of surveys were carried out in subtidal and intertidal zones. They were realised in autumn and winter, from September 1995 to March 1997, in an area extending from the...
Tipo: Text
Palavras-chave: Marine population; Halieutic; Biology; Estuary; Seine bay; Nursery.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1576.pdf

Caracterización molecular de Laelia halbingeriana y su propagación in vitro.
Provedor de dados: 32
Autores: Raya Montaño, Yurixhi Atenea.
Laelia halbingeriana pertenece a la familia Orchidaceae y debido a su descubrimiento relativamente reciente, no se ha caracterizado morfológica, cromosómica ni molecularmente. Con la finalidad de conocer la diversidad de esta especie y su posible relación con L. anceps, L. superbiens y L. autumnalis, la caracterización molecular  mediante el análisis de RAPDs se utilizaron 16 iniciadores, cuatro iniciadores mostraron productos de amplificación aceptable. Se observó 60.97 % de polimorfismo que denota gran variabilidad entre las especies de Laelia. Por otra parte se observó que el número cromosómico más común es de 2n=36. Además, en un tercer estudio se desarrolló una metodología para la propagación in vitro de L. halbingeriana se utilizó el medio de MS...
Palavras-chave: Laelia halbingeriana; Marcadores moleculares; Cromosomas; Micropropagación; Aclimatación; Molecular markers; Chromosomae; Micropropagation; Genética; Doctorado; Acclimation.
Ano: 2013
URL: http://hdl.handle.net/10521/2049

Epidemiología y manejo químico de la antracnosis (Colletotrichum gloeosporioides Penz.) y cenicilla (Oidium mangiferae Berthet) en mango (Mangifera indica L.) cv. manila en el trópico subhúmedo de Guerrero, México.
Provedor de dados: 32
Autores: Monteón Ojeda, Abraham.
Se estudió el progreso temporal de epidemias de antracnosis (C. gloeosporioides) y cenicilla (O. mangiferae) en dos huertos de mango (Mangifera indica) sujetos a programa de aspersión periódica de fungicidas de distinto grupo químico, modo de acción, combinación (rotación) y secuencia de aplicación, en concordancia con el desarrollo fenológico de tres flujos florales. El experimento se realizó en el huerto comercial “Las Tunas” en la región del trópico subhúmedo (Costa Grande) de Guerrero, México, durante el ciclo productivo 2010-2011. Las escalas fenológicas utilizadas permitieron identificar la floración plena, amarre inicial (3-5mm Ø) y frutos tamaño (8-15mm Ø) como etapas críticas de infección. El inicio de las epidemias se registró 23-30 días...
Palavras-chave: Mangifera indica; C. gloeosporioides; O. mangiferae; Epidemia; Manejo; Fungicida; Epidemics; Management; Fungicide; Fitopatología; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/752

Utilisation de Posidonia oceanica (L.) Delile comme bio-indicateur de la contamination métallique
Provedor de dados: 5
Autores: Lafabrie, Céline.
The coastal zone of the continental shelf contains a high ecological richness. However, this zone is very fragile towards xenobiotics ; the pollution of this environment can be damaging to the structure of the biocenoses and to the productivity of the ecosystems. Metals, contrarily to numerous contaminants, are normal constituents of the environment at a trace level, but are all toxic above a certain threshold. At the end of the 1970s, several researchers proposed the use of organisms to evaluate the quality of the marine environment ; it is in this context that the bio-indicator concept arises. The seagrass Posidonia oceanica (L.) Delile, endemic of the Mediterranean Sea, has been the subject of several works proposing to use this species to determine the...
Tipo: Text
Palavras-chave: Mediterranean Sea; Human impacts; Metal contamination; Trace metals; Bio indicator; Posidonia oceanica; Méditerranée; Impacts anthropiques; Contamination métallique; Métaux traces; Bio indicateur; Posidonia oceanica.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3082.pdf

Evaluation des effets délétères des métaux et des pesticides sur les gamètes et les premiers stades de développement de l’huître creuse, Crassostrea gigas : application à la problématique de la pollution du Bassin d’Arcachon
Provedor de dados: 5
Autores: Mai, Huong.
The coastal areas are subject to multiple anthropogenic pressures including chemical pollution that can pose a real risk to the sustainability of aquatic species. The Arcachon Bay, macrotidal lagoon located on the French Atlantic coast, is the important ecosystem for oyster farming. But for several years, the oyster farms face lower recruitment and high mortality of oyster spat. Chemical contamination of the environment as a factor that may contribute to the observed effects on oysters has so far not been investigated.The present thesis aimed at evaluating through different approaches, of the potential toxicity of heavy metals and pesticides representative of the Arcachon Bay contamination on the early life stages of the Pacific oyster, Crassostrea gigas....
Tipo: Text
Palavras-chave: Métaux; Huitre creuse; Test embryo-larvaire; Génotoxicité; Test de fertilité; Expression de gènes; Comet assay; Gene expression; Fertilization assay; Pesticides; Metals; Pacific oyster; Embryo-larvae toxicity assay.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00590/70183/68199.pdf

Etude sur la pêcherie de langoustines de mer Celtique
Provedor de dados: 5
Autores: Charuau, Anatole; Chesnier, Véronique; Conan, Gérard; Derennes, Marc; Destanque, Catherine; Guenole, Annie; Isifou, Amadou; Jezequel, Michèle; Miossec, Gilbert; Missaoui, Ichmi; Morizur, Yvon; Rivoalen, Jean-jacques.
Introduction : Since 1978, new measures to better manage lobster fisheries were implemented in the Celtic Sea within the context of Community regulations. Meshing, in particular, was set at 60mm, but many owners, in order to maintain sufficient leeway vis-à-vis the regulations and to avoid administrative hassles adopted at the outset fish meshing at 70mm, even 80mm. Certain habits aiming to compensate for the losses due to these increases were established: Adoption of better-performing trawls, increase in the secondary catch and enlargement of the fisheries. At the same time, especially because of strong demand from international bodies, OEM and especially EEC, knowledge about the lobster spread and more reliable assessments were achieved, the main problem...
Tipo: Text
Palavras-chave: Stock assessment; Norway lobster; Celtic sea; Nephrops Norvegicus; Crustacea; Lobster fishery; Mer Celtique; Nephrops Norvegicus; Crustacea; Effort Peche; Sex Ratio; Capture; Relation Taille Poids; Maillage; Chalut; Gestion stock; Peche.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/rapport-2337.pdf

Report of the Working Group on the Ecosystem Effects of Fishing Activities (WGECO), 11-18 April 2012, Copenhagen, Denmark
Provedor de dados: 5
Autores: ICES.
The 2012 meeting of WGECO was held at the ICES HQ in Copenhagen, Denmark from the 11–18 April 2012. The meeting was attended by 27 delegates from 13 countries, and was chaired by Dave Reid (Ireland). The WG addressed seven terms of reference.  a ) MSFD indicator and target evaluation. Request from ACOM;  b ) DCF Indicators on fishing pressures/impacts and possible developments/ improvements in these. Request from ACOM;  c ) Evaluate approaches and propose elements for inclusion for Ecosystem Impact Assessment of bottom fishing. Request from NEAFC;  d ) Indicators of foodweb condition in reference to MSFD Indicator 4;  e ) LFI development;  f ) Review of the state-of-the-art in understanding the combined effects of multiple ecosystem pressures, including...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00089/19999/17662.pdf

Évaluation des conséquences économiques de la gestion des risques sanitaires liés aux proliférations phytoplanctoniques marines
Provedor de dados: 5
Autores: Ami, Dominique; Rochaix, Lise.
General introduction: The setting up of monitoring networks for coastal water quality of the REPHY type by IFREMER was taken from a public health standpoint and fits broadly in with a principle of precaution regarding eating shellfish meant for human consumption. The benefits to be compared with the costs of managing the REPHY network (estimated at FF7.4 million in 1995) are therefore first and foremost the reduction of the risk of poisoning and can be captured by subtracting the sanitation costs that are associated with them. Evaluating these direct benefits is, however, no easy task. The network leads in fact to the reduction of occurrences of poisoning such that the epidemiological data on which such a calculation should be founded diminishes over time....
Tipo: Text
Palavras-chave: Algal bloom; Phytoplankton bloom; Mussel culture; Coastal water; Pollution monitoring; Economic impact; Phytoplancton; Conchyliculture; Eau cotiere; Surveillance pollution; Economie.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-1741.pdf

Etude théorique et pratique de  la pêche a la lumière
Provedor de dados: 5
Autores: Kurc, Georges; Blancheteau, Marc.
Light fishing is an extremely old practice. It most likely originates from distant times when a man, using a flaming torch next to a river, realised that fishes gathered next to the lightened bank. After that, night fishing, using a fire-or "clairon"-, developed in France and other countries. Different types of light generators were used: torches, burning coal positioned on a grid at the back of the boat, and more recently acetylene, fuel or propane lamps. Finally, for about a decade, electric generators using different tensions have been tried out to supply reflectors and produce a powerful and continuous brightness. In France, fire fishing has been practiced for a long time by Mediterranean fishers who, having replaced the traditional gillnet-called...
Tipo: Text
Ano: 1966
URL: http://archimer.ifremer.fr/doc/1966/publication-3971.pdf

L'hydrologie et les courants du détroit de Gibraltar  pendant l'été de 1959
Provedor de dados: 5
Autores: Allain, Charles.
It is difficult to draw a general conclusion for a study so limited in space and in time. We have seen that the hydrological regime in the Gibraltar Strait is subject to rapid fluctuations and the overall nature of the exchange flow between the Atlantic Ocean and the Mediterranean Sea can only be summarised after a large number of observations at permanent stations.In a certain manner, each chapter constitutes a separate study that progressively highlights new elements and that has its own conclusion. For this reason, we content ourselves with a review of the main points that were considered.After a brief historical account of the different oceanographic cruises in the Gibraltar Strait, we examined a vertical section and two horizontal sections of...
Tipo: Text
Ano: 1964
URL: http://archimer.ifremer.fr/doc/1964/publication-4028.pdf

Case studies on fluids and seismicity in submarine environments based on Ocean Bottom Seismometers (OBS) recordings from the Sea of Marmara and application to the Niger Delta
Provedor de dados: 5
Autores: Tary, Jean-baptiste.
The present work addresses the issue on fluids and deformation coupling in marine environments, a subject of crucial importance for natural (e.g. earthquakes, landslides) and industrial (e. g. stability of drilling platforms) hazards. Three case studies are presented: the first two concern the Sea of Marmara (Turkey), an area highly exposed to earthquake hazards due to its proximity to a seismic gap along the North Anatolian Fault; the third concerns an oilfield area situated on the continental slope offshore Nigeria, in the eastern part of the deepwater Niger Delta. The first case study in the Sea of Marmara concerns the microseismic activity below the western escarpment of the Tekirdag Basin. Our work shows that the tectonic activity in this area...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00034/14557/11854.pdf

Marqueurs microsatellites chez l'huître plate Ostrea edulis l. : caractérisation et applications à un programme de sélection pour une résistance au parasite Bonamia ostreae et à l'etude de populations naturelles
Provedor de dados: 5
Autores: Launey, Sophie.
The flat oyster Ostrea edulis L. is the indigenous oyster of the Atlantic as well as the Mediterranean coasts of Europe.  Its commercial exploitation dates back to Antiquity but its breeding is now threatened by two parasitic protozoa, among which Bonamia ostreae. Various aspects of the genetics of this species' natural and farmed populations have been studied with the aid of microsatellite markers.  At first, the implementation and the screening of two partial genomic libraries made it possible to identify 28 new microsatellite loci. Analysis of the segregation of 12 of these loci and of two enzymatic loci shows that most microsatellite loci are transmitted in a Mendelian way, but some loci have significant segregation distortions. Moreover, seven linkage...
Tipo: Text
Palavras-chave: Microsatellites markers; Parasite; Bonamia ostreae; Oyster; Ostrea edulis; Marqueurs microsatellites; Parasite; Bonamia ostreae; Huître; Ostrea edulis.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/these-1919.pdf

Approche dynamique et intégrée de l’évaluation d’un socio-écosystème côtier. Application à la lagune de Thau, son état écologique et ses bouquets de services écosystémiques sur la période 1970-2018
Provedor de dados: 5
Autores: Derolez, Valerie.
The Thau lagoon is one of the largest Mediterranean coastal lagoons and it supports many uses such as shellfish farming and fishing, priority activities of the territory, and more recently recreational activities. Since the 1960s, the increase in anthropogenic inputs, linked to the sudden growth of the population, led to microbiological contaminations of shellfish and degraded status of the lagoon, with negative impacts at sanitary, ecological and socio‐economic levels. Since the 1970s, the considerable work carried out on the waste water system on the watershed has made it possible to restore the lagoon, which then began an oligotrophication trajectory, a process that has still few been studied in coastal environments. Subject to a variety of pressures...
Tipo: Text
Palavras-chave: Lagoon; Eutrophication; Oligotrophication; Ecological status; Ecosystem services; Socio‐ecosystem; Thau.; Lagune; Eutrophisation; Oligotrophisation; État écologique; Services écosystémiques; Socio‐écosystème; Thau.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00662/77364/78938.pdf

Impact of macroalgal dredging on dystrophic crises and phototrophic bacterial blooms (red waters) in a brackish coastal lagoon
Provedor de dados: 5
Autores: Guyoneaud, R; De Wit, R; Matheron, R; Caumette, P.
The Prevost lagoon (Mediterranean coast, France), was subject to annual dystrophic crises caused by the biodegradation of opportunistic macroalgae (Ulva lactuca) in the past. These crises result in anoxic waters with subsequent blooms of Purple Sulphur Bacteria (red waters) which, by oxidizing sulphide, contribute to the reestablishment of oxic conditions in the water column. Mechanical dredging of the macroalgal biomass has been carried out in the lagoon since 1991 with the aim of preventing the ecological and economic disturbances caused by such crises. Dredging began just before the phototrophic bloom when the water was already hypoxic (O-2 = 0.7 mg . L-1) and contained sulphilde (H2S = 7.3 mg . L-1) and purple patches of phototrophic bacteria...
Tipo: Text
Palavras-chave: Milieu lagunaire; Macroalgues; Crise dystophique; Eaux rouges; Bactéries phototrophes; Lagoons; Macroalgae; Dystrophic crisis; Red waters; Phototrophic bacteria.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43658/43216.pdf

Effet des conditions environnementales sur le développement des pathologies à Vibrio dans les élevages de crevettes en Nouvelle-Calédonie
Provedor de dados: 5
Autores: Lemonnier, Hugues.
Shrimp aquaculture in New Caledonia is a developing industry, exclusively based on the species Litopenaeus stylirostris. However, it is subject to mortalities during grow out as observed all over the world. Since 1993, shrimp reared during the cold period are affected by a disease named "syndrome 93". As a consequence, the whole industry has become seasonal and produces essentially during the warm season. The climatic conditions during the periods of transition between the two main seasons could be responsible for an environmental stress and the origin reason for mortality outbreaks. Stocking density is the main risk factor. It increases the probability of the appearance and development of the epizooty in the pond. The "Summer Syndrome", a septicemic...
Tipo: Text
Palavras-chave: New Caledonia; Risk factors; Environmental stress; Vibriosis; Epizooty; Pond management; Eutrophication; Pond health; Shrimp; Litopenaeus stylirostris; Peneids; Aquaculture; Nouvelle  Calédonie; Facteur de risque; Stress environnemental; Vibrioses; Pratiques d'élevage; Eutrophisation; Santé de l'écosystème bassin; Crevette; Litopenaeus stylirostris; Pénéides; Aquacultre.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-2643.pdf

Evaluation du descripteur 8 « Contaminants dans le milieu » en France Métropolitaine.
Provedor de dados: 5
Autores: Mauffret, Aourell; Chiffoleau, Jean-francois; Burgeot, Thierry; Wessel, Nathalie; Brun, Melanie.
Good Environmental Status (GES) for descriptor 8 of MSFD is reached when concentrations of contaminants are at levels not giving rise to pollution effects. According to the decision 2017/848/CE, descriptor 8 is defined by four criteria: concentration in the relevant matrices (sediment, biota) (D8C1), effects of chronic contamination to the marine organisms (D8C2), duration and spatial extent of acute pollution events (D8C3), effects of acute contamination to the marine organisms (D8C4). The GES for descriptor 8 is assessed at the level of four marine subregions (SRM), including: Channel – North Sea (MMN), Celtics Seas (MC), Bay of Biscay (GdG) and the Occidental Mediterranean Sea (MO). In order to achieve GES, each indicator of descriptor 8 should respect...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57294/59374.pdf

Hydrologie variations saisonnieres de la situation thermique du Golfe de Gascogne en 1967
Provedor de dados: 5
Autores: Vincent, André; Kurc, Georges.
Knowledge of the hydrological regime of an oceanic sector such as the Gulf of Gascony is of vital interest for an ecological study of fish and other marine species. We have of course many data on this region where the Institute of Maritime Fishing has been conducting its research for 50 years now.  But what was missing was a systematic seasonal study of the entire Gulf covering several years.  A study of this kind, limited to the continental shelf but linked to more extensive research that will be published at a later time, was undertaken in 1967. The subject of this paper is its first results.   The method used consisted in plotting a network of 134 stations in the sector delineated by the French coast, the mouth of the English Channel, a line linking the...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-3155.pdf

Hydrologie de la Mediterranee occidentale (secteur meridional et Golfe du Lion), en automne 1963 Campagne de la « Thalassa » du 12 octobre au 27 novembre
Provedor de dados: 5
Autores: Allain, Charles; Furnestin, Jean.
The western basin of the Mediterranean was the subject of follow-up hydrological observations during these last few years by ships of the Institute of Maritime Fishing. Knowledge of the thermohaline structure over the far-flung sectors of the coastal strip, that of the fronts that form upon contact with the various opposing masses of water, also that of the particularly active vertical movements in this sea were in fact necessary for attempting to locate the various marine species in their respective habitat. It is in this way that during the summer of 1957, the President Theodore Tissier undertook a campaign that encompasses the sectors of the Alboran Sea, the Catalan Sea, the Gulf of Lion and western Corsica. The results of these observations were...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-3154.pdf

Croissance des juvéniles du merlu (Merluccius merluccius) des eaux septentrionales de la Tunisie à partir de l'analyse des microstructures des otolithes
Provedor de dados: 5
Autores: Khoufi, Widien; Elleboode, Romain; Jaziri, Héla; El Fehri, Safouène; Bellamy, Elise; Ben Meriem, Sadok; Romdhane, Mohamed; Mahe, Kelig.
Hake (Merluccius merluccius) is widely distributed in the Atlantic Ocean and the Mediterranean Sea. It is one of the most exploited demersal fish. In Tunisia, hake is captured from the north to the south (KHOUFI et al., 2010). Hake is an important species of economic interest and thus the subject of a large literature, but its biology remains insufficiently known, particularly on terms of age and growth estimations, which are essential for stock assessment and management. Otolith microstructure provides a useful tool for age determination of juvenile hake, based on daily increment deposition (ARNERI &amp; MORALES-NIN, 2000; MORALES-NIN et al., 2005; KACHER &amp; AMARA, 2005; BELCARI et al., 2006). Consequently, we studied growth and estimated age, using...
Tipo: Text
Palavras-chave: Merluccius merluccius; Microstructure journalière; Phase pélagique; Taux de croissance; Merluccius merluccius; Daily microstructure; Pelagic phase; Growth rate.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22681/20416.pdf

Fonctionnement des marais maritimes atlantiques: échanges d'énergie et effets des flux aquacoles diffus
Provedor de dados: 5
Autores: Bel Hassen, Malika.
French estuaries, from the Atlantic coast to the English channel, have been characterized by a poor phytoplankton biomass. The turbidity has always been considered as the limiting factor for phytoplankton. Estuarine ecosystems are situated at the boundary between the land and the sea. Consequently, they are subject to an enrichment by nutrient loadings from upland ecosystems. Although it has been demonstrated that a part of the nutrient loadings support an important benthic production. The part, which escapes to the estuarine benthic and planktonic food web and is exported to adjacent estuarine ecosystems, still remains undetermined. Quantifying the nu trient and particulate matter exchange between a macrotidal Bay, the Fier d'Ars, and the adjacent ocean...
Tipo: Text
Palavras-chave: Aquaculture; Exportation; Matière dissoute; Fiers d'Ars; Systèmes d'Information Géographique; Importation; Usages; Lumière; Micorphytobenthos; Modélisation; Nutriments; Matière organique; Matière particulaire; Phytoplancton; Sédimentation; Aquaculture; Export; Dissolved matter; Fier d'Ars Bay; Geographic Information Systems; Import; Land use; Light; Microphytobenthos; Modelling; Nutrients; Organic matter; Particulate matter; Phytoplankton; Sedimentation.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00450/56185/57738.pdf

Étude prospective de l'exploitation des coquillages au large des côtes d'Aquitaine Volet : Ressources et première approche économique
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Duclercq, Benoit; Morandeau, Gilles; De Casamajor, Marie-noelle.
Introduction: With the objective of diversifying current fishing and at the request of professionals in Aquitaine, the Regional Commission of Maritime Fishing and Marine Breeding (CRPMEM) of Aquitaine has started a discussion about the possibilities of opening a shellfishery. In the context of this course of action, and because of the absence of information on the presence and size of the resource, the CRPMEM of Aquitaine asked IFREMER's Halieutic Resources Laboratory of Aquitaine (LRHA) for assistance in acquiring information on the subject. At the same time, a prospective analysis study of the exploitation of shellfish off the coast of Aquitaine—regulation and business section—was performed by the CRPMEM of Aquitaine (Coiffec, 2006).  At that same time,...
Tipo: Text
Palavras-chave: France; North east atlantic; Aquitaine coasts; Fleet; Geographical zones; Sampling; Bivalvia; Shellfish fisheries.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2217.pdf

Etude des nourriceries de la Baie de Seine orientale et de l'estuaire de la Seine
Provedor de dados: 5
Autores: Morin, Jocelyne; Riou, Philippe; Bessineton, Christophe; Vedieu, Christophe; Lemoine, Michel; Simon, Serge; Le Pape, Olivier.
This study, carried out from 1995 to 1997, within the framework of "Le Havre" harbour extension project, concerned halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and the Seine estuary . The main objective was to describe the specific and demographic composition of marine populations and their spatio-temporal distribution, and so assess the biological and halieutic role of this area. This study also included a research about the dietary needs of fish juveniles living in the estuary.  Autumn and winter surveys results show that the estuary and area under direct influence are the richest from a biological and halieutic point of view. The mouth estuary isthe richest area in terms of diversity of...
Tipo: Text
Palavras-chave: Bay of Seine; Estuary; Food; Trophic; Juvenile; Nursery; Baie de Seine; Estuaire; Alimentation; Trophique; Juvénile; Nourricerie.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1507.pdf

Synthèse des pêcheries 2000 - Flotte Mer du Nord, Manche, Atlantique
Provedor de dados: 5
Autores: Berthou, Patrick; Daures, Fabienne; Guyader, Olivier; Merrien, Claude; Jezequel, Michele.
This summary of the French fisheries of the North Sea/English Channel/Atlantic for the year 2000 is done in the context of the programme "Halieutic Information Systems" that has as its goal the creation of a permanent and operational observatory of fishing. It brings together several types of data: statistical data of administrative origin, data from the IFREMER pollsters network, economic data and data acquired during sea campaigns. This first annual summary of French fisheries, meant for all actors in the fishing industry (from research to professionals and managers) and the general public, is limited to the Atlantic coast. The first part of this document contains an overall description of the English Channel Atlantic fleet, that is, all trades included....
Tipo: Text
Palavras-chave: Fishing gear; French fisheries; Fishing fleet; Species; Metier; Atlantic Ocean; Channel; North Sea; Pêcheries françaises; Flottille de pêche; Engins de pêche; Espèces; Métier; Atlantique; Manche; Mer du Nord.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-2629.pdf

The opening of the Indian Ocean : what is the impact on the East African, Madagascar and Antarctic margins, and what are the origins of the aseismic ridges ?
Provedor de dados: 5
Autores: Thompson, Joseph Offei.
Gondwana, formed during the Pan-African Orogeny between 720 and 550Ma, composed of Archean and Paleoproterozoic Cratonic cores surrounded by accreted progressively younger terrains of Mesoproterozoic and Neoproterozoic age. The event saw the closure of a number of large ocean basins and the collision of several cratonic blocks to form the largest unit of continental crust (Pangea) on earth for more than 200Ma from the Late Neoproterozoic 550 Ma to the Carboniferous at about 320 Ma. Its subsequent fragmentation has been a subject of several studies over the past five decades, yet the very important question of the initial geometry of the super-continent remains enigma. Current reconstruction models of the Indian Ocean are characterized by large gaps,...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52637/53483.pdf

Evolution à moyen terme d'un écosystème estuarien : le bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Soletchnik, Patrick.
The Marennes Oléron Bay, the main French oyster culture basin, is an estuarine zone which is subject to anthropic pressure. Meteorological parameters such as temperature, insolation, pluviometry determine, for the most part, the water temperature and salinity conditions for each season and control the nutrient fluxes, as well as the primary and secondary production of the basin. The average air temperature (Météo -France) stays around 12.5°C between 1950 and 1980, then rises more than 1°C in 20 years. In those 50 years, average insolation drops from 198 hours to 176 hours, corresponding to an 11% decrease. Seasonal distribution of water inputs shows that spring pluviometry increased by 30% between the 1950's and the last two decades. Precipitations also...
Tipo: Text
Palavras-chave: Ressource trophique; Crassostrea gigas; Production primaire; Bassin Marennes Oléron; Ecosystème.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/acte-3381.pdf

Motivations et présentation du programme « Bassins versants et transmission des pollutions au littoral »
Provedor de dados: 5
Autores: Merceron, Michel; Le Bozec, Gildas.
As for its physical layout, Brittany is characterised by a very dense water system, catchment areas that are mostly of small size (a few dozen square kilometres) and a very significant line of coasts with regard to its surface area. These environments, very close and interdependent, are rich with life, and yet have been affected for many years by dramatic incidents of contamination: the proliferation of marine green algae and the degradation of the quality of the surface fresh waters are the most visible manifestation of this. Among the incidents of contamination that affect these environments—many of them are brought mainly and crucially by continental waters—are those originating from agriculture.  Over the last 30 years, Brittany has experienced very...
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/acte-2840.pdf

Report of the Regional Co-ordination Meeting for the North Sea and Eastern Arctic (RCM NS&amp;EA) 2014. Swedish University of Agriculture Sciences (SLU Aqua) Lysekil, Sweden 08-12 September 2014
Provedor de dados: 5
The RCM NS&amp;EA met in Lysekil (Sweden) between 8-12 September 2014. The main purpose of the RCM is coordinate the National Programmes (NP) of the Member States (MS) in the North Sea region for 2015. The Data Collection Framework (DCF) is under revision to adapt it to the changes in the current Common Fishery Policy (CFP). In 2015, a landing obligation will be introduced to pelagic fisheries in EU waters. In the following years, this landing obligation will be extended to all fisheries. The landing obligation will affect the biological sampling and it is likely that already in 2015 changes in the scientific sampling need to be introduced. At present there is little clarity about the conditions or rules of how exempt discards at-sea may take place....
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00226/33683/32050.pdf

Sea Turtle Conservation on Bonaire. Sea Turtle Club Bonaire 1997. Project Report
Provedor de dados: 16
Autores: Schuit, M.; Put, A.L.L.M. van; Valkering, N.P.; Eijck, T.J.W. van.
The Sea Turtle Club Bonaire (STCB) is a non-governmental, non-profit organization. Its main goal is the conservation of the sea turtles that occur on Bonaire. To reach this goal, annual projects are undertaken, such as research and the promotion of public awareness on sea turtle conservation. The STCB undertakes research in order to monitor the nesting activity of the two sea turtles species which nest on Bonaire: the hawksbill turtle ( Eretmochelys imbricata ) and the loggerhead turtle ( Caretta caretta). Regular beach surveys are performed in order to locate and record the crawls. Nests are excavated to determine the number of eggs, the hatching success and to obtain information on the non-hatched eggs. Turtle nesting activity was observed from late...
Tipo: Article / Letter to the editor
Ano: 1998
URL: http://www.repository.naturalis.nl/record/506329

Seychelles tuna bulletin: Year 2008
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transhipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transhipment. Readers should note that many of the figures presented here are subject to revision (usually upwards)...
Tipo: Other
Palavras-chave: Tuna fisheries; Purse seiners; Catch statistics.
Ano: 2009
URL: http://hdl.handle.net/1834/5187

Seychelles tuna bulletin : first quarter 1996
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners Principal Points - The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1996
URL: http://hdl.handle.net/1834/5195

Seychelles tuna bulletin: second quarter 1997
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners PRINCIPAL POINTS The total purse seine tuna catch for the Western Indian Ocean...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1997
URL: http://hdl.handle.net/1834/5213

Seychelles tuna bulletin: third quarter 1997
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners. PRINCIPAL POINTS: The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1997
URL: http://hdl.handle.net/1834/5206

Seychelles tuna bulletin: Year 2009
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transhipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transhipment.  Readers should note that many of the figures presented for longline fishing vessel are subject to...
Tipo: Other
Palavras-chave: Purse seiners; Tuna fisheries; Catch statistics.
Ano: 2010
URL: http://hdl.handle.net/1834/5188

Seychelles tuna bulletin : fourth quarter 1995
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (‘logbooks’) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most purse seiners are fishing in the Mozambique Channel. The long liners are generally slow in returning logbooks. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners Principal Points - The total...
Tipo: Other
Palavras-chave: Catch statistics; Purse seiners; Tuna fisheries.
Ano: 1996
URL: http://hdl.handle.net/1834/5193

Seychelles tuna bulletin: first semester 2002
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table.  PURSE SEINERS PRINCIPAL POINTS:  The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 2002
URL: http://hdl.handle.net/1834/5214

Seychelles tuna bulletin: Year 2010
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transhipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transhipment.  Readers should note that many of the figures presented for longline fishing vessel are subject to...
Tipo: Other
Palavras-chave: Purse seiners; Tuna fisheries; Catch statistics.
Ano: 2011
URL: http://hdl.handle.net/1834/5191

Seychelles tuna bulletin : first quarter 1995
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort report forms (1ogs') returned from the fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is now shown at the head of each table. Principal Points Purse seiners - The revised total catch for the Western Indian Ocean for 1994 is now 272,192 t. This is the...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1995
URL: http://hdl.handle.net/1834/5215

Seychelles tuna bulletin: first semester 1998
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners. PRINCIPAL POINTS: The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1998
URL: http://hdl.handle.net/1834/5202

Seychelles tuna bulletin : first quarter 1997
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a del{--y in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners. PRINCIPAL POINTS: The total purse seine tuna catch for the Western Indian...
Tipo: Other
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries.
Ano: 1997
URL: http://hdl.handle.net/1834/5211

Seychelles tuna bulletin : third quarter 1995
Provedor de dados: 20
Data used to generate the tables and figures presented here are based on daily catch and effort forms (‘logbooks') returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as ore data become available. The date upon which the SFA database was closed prior the generation of the statistical tables is shown at the head of each table. Purse seiners Principal Points - The revised total purse seine tuna catch for the Western...
Tipo: Other
Palavras-chave: Catch statistics; Purse seiners; Tuna fisheries.
Ano: 1995
URL: http://hdl.handle.net/1834/5217

Some aspects of respiration in &lt;i&gt;Artemia salina&lt;/i&gt; L.
Provedor de dados: 27
Autores: Decleir, W.; Vos, J.
The most striking phenomenon in the physiology of &lt;i&gt;&lt;i&gt;Artemia&lt;/i&gt; salina&lt;/i&gt; L. is the diapause phase under the form of a cyst in the gastrula stage. Thus for example, can dried cysts resist to extreme stress conditions, without affection of their hatchability after hydration. They withstand complete dehydration exception made for some traces of residual water (Whitaker, 1940); they resist to a temperature of 100°C for more than an hour (Hinton, 1954) , and can be kept at the absolute zero temperature for an indefinite period (Skoultchi and Morowitz 1964). Eventhough hydrated cysts are less tolerant of these "extravagant" conditions, they nevertheless are only slightly sensitive to anoxia for periods up to 5 months (Dutrieu,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemia salina.
Ano: 1977
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3556

Criteria for the a-biotic and biotic realm: environment and ecology
Provedor de dados: 21
Autores: van Mansvelt, J.D.; Znaor, Darko.
This work is an interdisciplinary, cross-cultural, widely-calibrated checklist for EU sustainable landscape management, which is intended to serve both as an analytical tool of reference as well as a design tool for local, regional and European policy making on sustainable developments.    The tool has been developed out of a multidisciplinary study in EU countries which was designed to find out what would be the overall requirements for a sustainable management of the landscape of rural areas. Could these stipulations be brought together in a comprehensive system with sufficient consistency to comply with the notion that the landscape is an entity, which should be managed accordingly? Cooperation of the scientific experts with those involved in the...
Tipo: Book chapter
Palavras-chave: "Organics" in general Soil quality Farm economics Farming Systems Food security; Food quality and human health Crop husbandry Social aspects Air and water emissions Soil Values; Standards and certification Biodiversity and ecosystem services Food systems Policy environments and social economy Landscape and recreation Environmental aspects Farm nutrient management.
Ano: 1999
URL: http://orgprints.org/26410/1/601502.gif

Analysis of black holes in our knowledge concerning animal health in the organic food production chain
Provedor de dados: 21
Autores: Kijlstra, Aize; Groot, Maria; Roest, van der, Joop; Kasteel, Daniella; Eijck, Ineke.
Although a large body of research on health aspects can be found via the web or in conference proceedings, only few papers reach the peer reviewed literature. This aspect makes it difficult to judge the quality of available data that relate to health aspects associated with organic livestock production.     Many data deal with "on farm case type studies" which often do not lead to a direct relation between certain management procedures and incidence of certain health aspects.    The principle that organic held animals are in better condition concerning their health as compared to conventionally held animals has not yet been proven. Well-controlled studies are needed to show the effects of organically held animals on innate and adaptive immune responses and...
Tipo: Report
Palavras-chave: Health and welfare.
Ano: 2003
URL: http://orgprints.org/1034/1/IDhiaten.pdf

Market Review of the Welsh Organic Arable Sector, 2007
Provedor de dados: 21
Autores: Hitchings, Roger; Clarke, Sarah; Trump, Andrew.
The supply situation for Welsh organic arable production  Organic production in Wales has been developing steadily in the last five years, with particular emphasis on organic cattle and sheep production. This was despite over-supply conditions in some sectors, notably dairy, following the very rapid growth in 1999/2000. The area of organic arable production has tracked this increase albeit at a lower level. It is also a more complex situation than might be thought because of the different ways in which a cereal crop or mixture might be harvested. This sector is one of the least surveyed in the UK with the exception of the annual Scottish Organic Market Link Producer Survey carried out by SAC with SEERAD funding.  Between the end of 2002 and end of 2005,...
Tipo: Report
Palavras-chave: Cereals; Pulses and oilseeds Markets and trade.
Ano: 2007
URL: http://orgprints.org/11072/2/Arable_market_review_2007_report.pdf

Technique of green mulch spreading
Provedor de dados: 21
Autores: Schäfer, Winfried; Väisänen, Jaana; Pihala, Marjo.
Finland’s policy of subsidising the conversion to organic production precipitated the rapid growth of organic farming in the 1990’s. As a consequence, many stockless farms encountered the problems of nitrogen deficit, poor grain quality, and weed control. Since the spreading of green mulch on cash crops is very common especially in tropical agriculture, organic fertilisers like green mulch may be an alternative that would compensate for the prohibition on the use of mineral N-fertilisers. However, one problem is that presently there is no appropriate technique available to substitute for the strenuous handwork of spreading green mulch.     The main subject of this research report is the technique of green mulch spreading. Between 1994 and 1997, a green...
Tipo: Report
Palavras-chave: Composting and manuring.
Ano: 2001
URL: http://orgprints.org/608/1/tukimusselostus79.pdf

Bundesprogramm Ökologischer Landbau (BÖL): Tier
Provedor de dados: 21
The Federal Organic Farming Scheme (FOFS):  This scheme is a temporary funding source (2002 – 2007/2008) especially to support the whole organic farming sector (incl. research) in Germany.  In the summer of 2001, the Federal Ministry of Consumer Protection, Food and Agriculture commissioned a project team comprised of representatives from associations and science and headed by the Federal Agricultural Research Centre to develop a proposal for a package of measures to foster organic farming in Germany. A hearing of representatives from trade and industry, associations, consultancy, science and administration laid the foundation for the team's work.  Based on this work, the Federal Minister of Consumer Protection, Food and Agriculture Renate Künast decided...
Tipo: Research Programme description
Palavras-chave: Animal husbandry.
Ano: 2023

INTELLECTUAL PROPERTY PROTECTION AND THE INTERNATIONAL MARKETING OF AGRICULTURAL BIOTECHNOLOGY: FIRM AND HOST COUNTRY IMPACTS
Provedor de dados: 31
Autores: Goldsmith,   Peter D.; Ramos,   Gabriel; Steiger,   Carlos.
The protection of intellectual property rights has been a contentious issue over the last 20 years.  Industrialized nations have moved to knowledge-based economies and simultaneously trade barriers have fallen, making intellectual property vulnerable.   Adding to this vulnerability are conflicting international institutional environments, belief systems, and economic realities. The debate over IPR protection has become a significant global trade issue pitting the net- technology producing North against the net-technology consuming South.  The North maintains a comprehensive IPR institutional environment and actively employs enforcement mechanisms.  The South on the other hand, is more conflicted.  While in the last ten years many Southern countries have...
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2001
URL: http://purl.umn.edu/20672

EMPOWERING POOR RURAL WOMEN IN INDIA: EMPIRICAL EVIDENCE FROM ANDHRA PRADESH
Provedor de dados: 31
Autores: Deininger,   Klaus W.; Galab,   Shaik; Olsen,   Tore.
Even though overall growth in India has recently accelerated, it has largely bypassed rural areas and agriculture; in fact it is agreed that the ratio of rural to urban poverty has increased. As a consequence, some of the marginalized groups in a society that is already characterized by a high level of inequality in opportunities and segregation along lines of, gender, caste, and social status, are widely reckoned to not have benefited from overall growth. To enable women and backwards castes to expand their livelihood opportunities, a vast range of government programs have been initiated and large amounts of resources are being channeled to poor areas. An increasingly popular approach to do so relies on the concept of Community Driven Development (CDD)...
Tipo: Conference Paper or Presentation
Palavras-chave: Community/Rural/Urban Development.
Ano: 2005
URL: http://purl.umn.edu/19123

NAFTA, GATT, AND AGRICULTURE IN THE NORTHERN ROCKIES AND GREAT PLAINS
Provedor de dados: 31
Autores: Smith,   Vincent H.
Over the past seven years, the U.S. government has been involved in trade negotiations that have led to one bilateral and two multilateral agreements whose provisions have substantive implications for U.S. agricultural trade. The first of these sets of trade negotiations led to the bilateral Canada-United States Free Trade Agreement (CFTA). The second resulted in the current multilateral General Agreement on Tariffs and Trade (GATT) which was implemented on January 1, 1995. The third set of negotiations, initiated under the Bush Administration, led to the multilateral North American Free Trade Agreement (NAFTA), which was approved by Congress in November 1993 and implemented on January 1, 1994. The three agreements signed by the U.S. since the late 1980's...
Tipo: Working or Discussion Paper
Palavras-chave: NAFTA; GATT; Agriculture; Agricultural and Food Policy; Q1; F1.
Ano: 1997
URL: http://purl.umn.edu/29175

Continuity and change: Land and water use reforms in rural Uzbekistan. Socio-economic and legal analyses for the region Khorezm
Provedor de dados: 31
Autores: Wehrheim,   Peter; Schoeller-Schletter,   Anja; Martius,   Christopher; Djanibekov,   Nodir; Bobojonov,   Ihtiyor; Rudenko,   Inna; Lamers,   John P.A.; Muller,   Marc; Schieder,   Tina; Cai,   Ximing; Hirsch,   Darya; Wall,   Caleb.
Decades of Soviet rule have left a heritage of environmental and social problems in Central Asia. The demise of an entire ecosystem at unprecedented pace, the "Aral Sea Syndrome", is the most prominent of the undesired outcomes of the focus on agricultural production that has dominated land and resource use and continues till today. The international outcry over this ecological crisis has delegated other – and maybe more urgent – problems to a second pane. Rural livelihoods are rapidly deteriorating, unemployment is high, and rural poverty widespread. Ecological aspects, although strongly affecting everyday life in rural areas – such as water and soil salinity and environmental pollution – are not the fore most concern to the local population, as the...
Tipo: Book
Palavras-chave: Agribusiness; Community/Rural/Urban Development; Crop Production/Industries; Industrial Organization; Institutional and Behavioral Economics; International Relations/Trade; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/92320

Russlands Weg vom Plan zum Markt: Sektorale Trends und regionale Spezifika. Eine Analyse der Produktivitäts- und Effizienzentwicklungen in der Transformationsphase.
Provedor de dados: 31
Autores: Voigt,   Peter.
More than ten years after the departure of the Central and Eastern European Countries (CEEC) towards market economy and democracy now it seems to be possible as well as necessary to analyse the present settings, the developments so far, and relevant problems faced during the transition. The main tasks are making the transition process empirically transparent and investigate its determinants. This has to be done in order to understand the particular trends and – based on that – to conceptualise sustainable policy concepts as well as adjusted reform measures. According to this challenge an analytical dilemma arise regarding a general focus on the subject on hand side (universal validity of the results) and the desire for diversified and precisely answers to...
Tipo: Thesis or Dissertation
Palavras-chave: Community/Rural/Urban Development; Industrial Organization; Institutional and Behavioral Economics; Labor and Human Capital; Land Economics/Use.
Ano: 2004
URL: http://purl.umn.edu/93021

A RÉGIÓK EURÓPÁBAN
Provedor de dados: 31
Autores: Horvath,   Gyula.
Az Európai Unió kohéziós politikájának megvalósítását elősegítő intézmény – az 1–3 milliós népességű régió – Európa-szerte az érdeklődés középpontjában áll. A különböző államberendezkedésű országokban az ún. NUTS 2 régiók közjogi státusza eltérő. A régiók egy része fejlesztési és statisztikai célokat szolgál csupán, más részük ezek mellett kiterjedt közigazgatási jogosítványokkal is rendelkezik. Ez utóbbiak képesek komplex fejlesztési feladataik hatékony megoldására. A régiók intézményesülésének számtalan előfeltétele van. Az állami funkciók modernizálása, a regionális fejlődést befolyásoló tényezőkben bekövetkezett vál-tozások, a területi érdekérvényesítés, az etnikai-kulturális szempontok figyelembe vétele, illetve az európai integráció egységesítő...
Tipo: Journal Article
Palavras-chave: Regionális politika; Európai Unió; Kohéziós politika; Területi közigazgatás; Regional policy; European Union; Cohesion policy; Regional administration; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2007
URL: http://purl.umn.edu/57671

Genetically Modified Food and International Trade: The Case of India, Bangladesh, Indonesia and the Philippines
Provedor de dados: 31
Autores: Gruere,   Guillaume P.; Bouet,   Antoine; Mevel,   Simon.
Replaced with revised version of paper 07/27/07.
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007
URL: http://purl.umn.edu/9917

The Relevance and Implications of the Environmental Kuznets Curve Under Stock Effects and Non-Linearities: A Hysteresis Based Approach
Provedor de dados: 31
Autores: Ranjan,   Ram; Shortle,   James S.; Marshall,   Elizabeth P.
A number of studies in the past have come up in order to explain and verify the observation made by Grossman and Kruger that that there may exist an inverted U-shaped relationship between environmental pollution and income.  While some studies have found this relationship to hold true for certain pollutants, other studies have rejected this hypothesis based upon empirical observations of certain other pollutants.  Further, most of these results have been derived from cross-sectional observation of such patterns across countries and therefore have given rise to further sckepticism.  Though a number of empirical estimates of this relationship exist in the literature, there have been very few attempts to explain a theoretical basis for such a pattern....
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/22147

HOW CONFIDENT CAN WE BE IN CGE-BASED ASSESSMENTS OF FREE TRADE AGREEMENTS?
Provedor de dados: 31
Autores: Hertel,   Thomas W.; Hummels,   David; Ivanic,   Maros; Keeney,   Roman.
With the proliferation of Free Trade Agreements (FTAs) over the past decade, demand for quantitative analysis of their likely impacts has surged. The main quantitative tool for performing such analysis is Computable General Equilibrium (CGE) modeling. Yet these models have been widely criticized for performing poorly (Kehoe, 2002) and having weak econometric foundations (McKitrick, 1998; Jorgenson, 1984). FTA results have been shown to be particularly sensitive to the trade elasticities, with small trade elasticities generating large terms of trade effects and relatively modest efficiency gains, whereas large trade elasticities lead to the opposite result. Critics are understandably wary of results being determined largely by the authors' choice of trade...
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade.
Ano: 2003
URL: http://purl.umn.edu/28690

THE URUGUAY ROUND AGREEMENT ON AGRICULTURE: AN EVALUATION
Provedor de dados: 31
Autores: Josling,   Timothy E.; Honma,   Masayoshi; Lee,   Jaeok; MacLaren,   Donald; Miner,   William M.; Sumner,   Daniel A.; Tangermann,   Stefan; Valdes,   Alberto.
Contact for this paper: Laura Bipes/University of Minnesota/Department of Applied Economics/ 1994 Buford Avenue./ St. Paul, MN 55108 USA.  From the start, agriculture played a central role in the Uruguay Round of GATT trade negotiations.  The Punta del Este Declaration called for a solution to the problems facing agricultural trade through modified trade rules and an agreement to lower protection levels.  It was recognized that such an improvement implied negotiations on the national farm policies as well as just trade policies.  The time that it took to reach agreement reflected the political sensitivity and technical complexity of this task.   The Agreement embodied in the Final Act of the Uruguay Round breaks new ground for agriculture, and takes a big...
Tipo: Report
Palavras-chave: International Relations/Trade.
Ano: 1994
URL: http://purl.umn.edu/14621

Impacts of Agricultural Nutrient Regulation in a Heterogeneous Region
Provedor de dados: 31
Autores: Parker,   Douglas D.; Lichtenberg,   Erik.
Nonpoint sources of water pollutants, in particular, nutrients like nitrogen and phosphorus, are increasingly a focus of US water pollution policy.  In most cases, agriculture is the largest contributor of these pollutants, in part because, until recently, it has largely remained unregulated.  Recently, however, a number of initiatives have targeted nutrient runoff and leaching from animal agriculture.  Many states have promulgated new nutrient management regulations stipulating that manure be disposed of in ways that limit runoff and leaching to acceptably low levels.  Stricter state regulations have been especially common in the Mid-Atlantic and Southeast, where excess nutrients have proven particularly problematic (Gollehon et al.).  In 2003, the US...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/20249

Anatomical study of the brain stem of the Cebus apella monkey
Provedor de dados: 195
Autores: Marques, Karina do Valle; Prada, Irvênia Luiza de Santis; Silva, Zenon; Liberti, Édson Aparecido.
Objective: To perform an anatomical study of the external morphology of the brain stem of the Cebus apella monkey,describing its characteristics and comparing data with those found in literature regarding other primates, other mammals and mano Material and Method: The analysis of the external morphology of the brain stem of the Cebus apella was performed in 14 specimens. Results and Conclusions: The general organization of the structures of the brain stem of the Cebus apella is similar to that of other primates, including mano The following structures are evident on the anterior aspect of the brain stem: pyramis bulbi, decussatio pyramidum, oliva, pedunculus cerebellaris medius and pedunculus cerebri, as well as the apparent origin of the cranial nerves...
Tipo: Info:eu-repo/semantics/article
Ano: 2005
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3135

Anatomical study of the brain stem of the Cebus apella monkey
Provedor de dados: 195
Autores: Marques, Karina do Valle; Prada, Irvênia Luiza de Santis; Silva, Zenon; Liberti, Édson Aparecido.
Objective: To perform an anatomical study of the external morphology of the brain stem of the Cebus apella monkey,describing its characteristics and comparing data with those found in literature regarding other primates, other mammals and mano Material and Method: The analysis of the external morphology of the brain stem of the Cebus apella was performed in 14 specimens. Results and Conclusions: The general organization of the structures of the brain stem of the Cebus apella is similar to that of other primates, including mano The following structures are evident on the anterior aspect of the brain stem: pyramis bulbi, decussatio pyramidum, oliva, pedunculus cerebellaris medius and pedunculus cerebri, as well as the apparent origin of the cranial nerves...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brains stem; Medulla oblongata; Pons; Mesencephalon; Cranial nerves; Capuchim monkey; Cebus apella Tronco encefálico; Médula oblongata; Pons; Mesencéfalo; Nervios craneales; Mono prego; Cebus apella tronco encefálico; Bulbo; Ponte; Mesencéfalo; Nervos cramanos; Macaco prego; Cebus apella.
Ano: 2005
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3135

Additional to 'Diaeta naturalis'
Provedor de dados: 24
Autores: Linné, Carl von.
Collection of early notes on very different subjects, probably written during the first years of Linnaeus's student life. Many have been struck through, indicating they have been used in another of Linnaeus's manuscript, or published.  Some have pagination.  Includes the following material: - list of illnesses and pathological symptoms under the heading 'Evacuatorii'. Latin; - list of species of the genus "Erica". Latin and Swedish; - medical notes, Latin and Sweidsh. Short reference to 'Elizabeth Blackwell, Herbarium curiosum, Lond 1737 tab 500'. In 1739, von Haller wrote to Linnaeus alerting him to this new publication. See Albrecth von Haller to Carl Linnaeus, 11 January 1739, "The Linnaean correspondence", linnaeus.c18.net, letter L0270. Drawings of...
Tipo: Collection
Ano: 2023

Pressão de pré-compressão e comportamento hídrico de um Nitossolo Vermelho distroférrico em função do tamanho de agregados - DOI: 10.4025/actasciagron.v27i3.1464
Provedor de dados: 1
Autores: Pereira, Joaquim Odilon; UFERSA; Benez, Sérgio Hugo; UNESP; Silva, Suedêmio de Lima e; UNIOESTE; Queiroz, Manoel Moisés Ferreira de; UNIOESTE; Costa, João Candido Bracarense; UNIOESTE; Tabile, Rubens André; UNIOESTE.
A compactação do solo tem sido assunto de intensivas pesquisas nos últimos anos, mas os mecanismos que implicam no processo de compactação dos solos agrícolas ainda permanecem pouco conhecidos. A pressão de pré-compressão tem sido freqüentemente usada como um critério de avaliação da susceptibilidade do solo à compactação. A contribuição do tamanho de agregados do solo e o efeito do teor de água foram investigados na compactação de um Nitossolo Vermelho distroférrico, denotando textura muito argilosa. Amostras de solo deformado, constituído de agregados menores de 2,5 mm A1 e agregados de 9,3 mm a 19,4 mm A2, foram submetidas a ensaio de compressão uniaxial drenado. O índice de compressão, a pressão de pré-compressão e o comportamento hídrico do solo foram...
Palavras-chave: 5.01.01.00-5    Ciência do Solo compressão uniaxial; Compactação do solo; Pressão de pré-compressão 5.01.01.00-5    Ciência do Solo.
Ano: 2005
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1464

Características produtivas do capim-braquiária submetido a intervalos de cortes e adubação nitrogenada durante três estações - doi: 10.4025/actascianimsci.v32i4.8574
Provedor de dados: 2
Autores: Maranhão, Camila Maida de Albuquerque; UESB; Bonomo, Paulo; UESB; Pires, Aureliano José Vieira; UESB; Costa, Alexsandro Cotrim Pimentel Ribeiro; UESB; Martins, Giselle Caroline Fernandes; UESB; Cardoso, Elisangela Oliveira; UESB.
Objetivou-se com este estudo avaliar a produtividade do capim-braquiária submetido a diferentes intervalos de cortes e adubação nitrogenada, nos períodos do verão, do outono e do inverno. O experimento foi instalado na Universidade Estadual do Sudoeste da Bahia em área já estabelecida de Brachiaria decumbens cv. Basilisk. Foi conduzido em esquema fatorial 5 x 2, sendo cinco intervalos de cortes (21, 28, 35, 42 e 49 dias) e duas doses de nitrogênio (0 e 200 kg N ha-1). O delineamento utilizado foi o de blocos ao acaso com quatro repetições. As variáveis analisadas foram: altura do dossel (cm), teor de matéria seca (%), produção de matéria seca total (PMS, ton ha-1) e produção diária de matéria seca (kg MS dia-1). A adubação aumentou em 40,8% a altura da...
Tipo: Pesquisa de campo
Palavras-chave: 5.04.04.00-8 Altura; Brachiaria decumbens; Produção diária; Teor de matéria seca 5.04.04.01-6 Height; Brachiaria decumbens; Daily production; Dry matter rate.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/8574

Etude comparative des caractéristiques écophysiologiques et des performances de croissance de l'huître creuse Crassostrea gigas diploïde et triploïde en milieu contrôlé
Provedor de dados: 5
Autores: Haure, Joel; Fortin, Adeline; Dupuy, Beatrice; Nourry, Max; Palvadeau, Hubert; Papin, Mathias; Penisson, Christian; Martin, Jean-louis.
Introduction: Marine farming in France is currently very widely dominated by oyster farming. French oyster production totals 148,467 tons, for a turnover of close to 280 million euros, making France the leading European producer. The two main species concerned are the cup oyster, Crassostrea gigas (140,000 tons) and the flat oyster, Ostrea edulis (2,000 tons), the production of which has collapsed since 1970 following successive epizootics of Marteilia refringens and Bonamia ostreae. French oyster farming is thus in a situation of quasi single-crop farming, with more than 90% of tonnage pertaining to the cup oyster (FAO data from 1993).  This situation of quasi single-crop farming leads to the pessimistic observation that one hypothetical crisis in the...
Tipo: Text
Palavras-chave: Growth; Ecophysiology; Oyster; Crassostrea Gigas; Eeproduction; Milieu Controle; Croissance; Triploide; Diploide; Ostreidae; Huitre; Crassostrea Gigas; Ecophysiologie; Reproduction.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-1509.pdf

Diversité et différentiation génétiques des populations de tortues vertes (Chelonia mydas) dans les sites de ponte et d'alimentation du sud-ouest de l'océan Indien : application aux stratégies de conservation de l'espèce
Provedor de dados: 5
Autores: Taquet, Coralie.
The green turtle (Chelonia mydas) is an emblematic species of marine life. However, nowadays it is subject to many threats (poaching, by-catch). Even if there is deep growing measures for its protection, the green turtle still is an endangered species and it is listed in Appendix I of Washington Convention (CITES). In order to elaborate efficient conservation and management plans, perfect knowledge of green turtle biology, but also of its population structure and their characteristics, are needed.  In this thesis, we have assessed genetic structure of green turtle populations in the South-Western Indian Ocean by using genetic tools. In all, 1551 tissue samples have been collected from our study zone and from our control site French Polynesia (37 samples)....
Tipo: Text
Palavras-chave: Management units; Microsatellites; Mitochondrial DNA; Foraging sites; Nesting sites; South Western Indian Ocean; Population genetics; Chelonia mydas; Green turtle; Unités de gestion (MUs); Microsatellites; ADN mitochondrial; Sites d'alimentation; Sites de ponte; Génétique des populations; Chelonia mydas; Tortue verte.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3532.pdf

Finalisation d’un outil préopérationnel FlowCAM / ZooPhytoImage. Action9 - FlowCAM ZooPhytoImage. Livrable n° 3. Rapport final
Provedor de dados: 5
Autores: Wacquet, Guillaume; Lefebvre, Alain; Colas, Florent; Grosjean, Philippe.
Today, the most widely used method for the analysis of samples within the REPHY network, is the microscopy. However, this method has several drawbacks: different skill level depending on the analyst, taxa may be misidentified, analyst subject to fatigue and loss of concentration, non-quantifiable errors. That is why different axis of development have been proposed to adapt the FlowCAM and ZooPhytoImage to the requirements of REPHY network which are the accuracy and repeatability of the measurement. The purpose of these new tools being to provide a tangible gain of time for analysts compared to the observations with optical microscope. The analysis time being a key point of this system, studies were conducted in order to achieve a fast acquisition. To have...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00363/47440/47465.pdf

Hydrologie du Maroc atlantique
Provedor de dados: 5
Autores: Furnestin, Jean.
Many oceanographers acknowledge the particular features of the waters from the continental shelf-also called continental waters, but which should be called coastal waters. Less saline than offshore waters, coastal waters are often warmer in the summer and colder in the winter, at least in temperate regions. Given their shallowness and their proximity to the coast, coastal waters are subject to currents and mixing that are highly influenced by tides, waves, floods and various atmospheric factors. These features make for a mixed area where classic hydrological features are obscured by local and seasonal variation and not expressed as clearly as in offshore waters. This may be one of the reasons why oceanographers have concentrated their efforts on offshore...
Tipo: Text
Ano: 1959
URL: http://archimer.ifremer.fr/doc/1959/publication-4470.pdf

Poissons des côtes nord-ouest africaines (Campagnes de la « Thalassa » 1962 et 1968)
Provedor de dados: 5
Autores: Maurin, Claude; Bonnet, Marc.
From the second half of the 19th century, several oceanographic ships prospected the northwest coasts of Africa, but they only did so in passing. Their main zone of research was more extensive or farther from European coasts. Under these conditions, the area of knowledge remained limited for a long time, in this region, to shallow waters. Even just ten years or so ago, documents dealing with the ecology and nature of the sea beds more than 200 metres down were rare, in spite of the exploitation of which these sea beds were the target after the end of the First World War. It was to fill this gap, at least partially, that during the year 1962, from 6 November to 12 December, the Institute of Fishing's research ship, the Thalassa, conducted a mission for...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3135.pdf

Composition and structure of recent marine sediments in the Netherlands
Provedor de dados: 16
Autores: Straaten, L.M.J.U. van.
Ch. I. The environment of the Dutch Wadden Sea, as well as that of the estuaries in the southwestern part of the Netherlands can be divided into three sub-zones: (1) the channel floors (sensu lato), i.e. the areas below mean low tide level, (2) the tidal flats (sensu stricto), between the levels of mean low and mean high water and, (3) the salt marshes, above the level of mean high tide. The channel floors are composed, either of older sediments, which have been laid bare by erosion of the tidal currents, or by new deposits, formed in the channels themselves. The latter are predominantly of sandy character, but may show locally high contents of muddy material, especially in sheltered bays. The tidal flats consist for the greater part of sand. Slightly...
Tipo: Article / Letter to the editor
Ano: 1954
URL: http://www.repository.naturalis.nl/record/505622

The Shallow-water Octocorallia of the West Indian Region
Provedor de dados: 16
Autores: Bayer, Frederick M.
The alcyonarian fauna of the West Indies is prolific and conspicuous and has been known for many years, with the natural result that a great many more species have been described than actually exist. The deep-water fauna, which received little attention prior to the work of VERRILL, was thoroughly reviewed by DEICHMANN in 1936. The shallow-water and reef fauna was the subject of a series of extensive papers by KUKENTHAL and his collaborators, KUNZE, MOSER, RIESS, BIELSCHOWSKY, and TOEPLITZ, but this ambitious study appears to have been based upon inadequate collections and its usefulness is seriously limited by the number of synonyms and misidentifications that it contains. No comprehensive survey of the fauna exists, and there is no satisfactory guide for...
Tipo: Article / Letter to the editor
Ano: 1961
URL: http://www.repository.naturalis.nl/record/506065

Organic viticulture and wine-making: development of environment and consumer friendly technologies for organic wine quality improvement and scientifically based legislative framework. Deliverable: D 2.7 Public report about first round qualitative  consumer research and market needs
Provedor de dados: 21
Autores: Stolz, Hanna; Schmid, Otto.
This survey of consumers’ perceptions and expectations regarding organic wine and viticulture in the selected case study countries of Italy (IT), France (FR), Germany (DE) and Switzerland (CH) was conducted within the framework of the EU research project ORWINE (Organic viticulture and wine-making: development of environment and consumer friendly technologies for organic wine quality improvement and scientifically based legislative framework).  The objectives of the study were to investigate consumers’ knowledge and expectations regarding organic wine and viticulture, their preferences regarding different labelling concepts, and their perceptions regarding sulphites and/or the use of other additives. Consumers’ perceptions of organic table grapes and of...
Tipo: Report
Palavras-chave: Markets and trade; Consumer issues.
Ano: 2007
URL: http://orgprints.org/10608/1/stolz%2Dschmid%2D2007%2DORWINE_d2.7_consumers_research.pdf

Az élelmezés-, energia- és környezetbiztonság összefüggései
Provedor de dados: 31
Autores: Popp,   Jozsef; Potori,   Norbert.
A 2006/2007. gazdasági évtől a legtöbb mezőgazdasági termék ára gyors emelkedésnek indult és rekordokat döntött. A FAO élelmiszerár-indexe 2006 januárja és 2008 januárja között több mint 60 százalékkal emelkedett. Árkilengések persze korábban is előfordultak, de a legutóbbi ársokkot azonban számos tényező együttesen idézte elő. Ezek felsorolásánál első helyen említhető a világ gabona- és olajosmagkészleteinek megcsappanása: a Föld élelmiszermérlege évtizedek óta nem mutatott ilyen szűkös tartalékokat. Ehhez egyértelműen hozzájárult a rövidlátó gazdaságpolitika is. Ugyanakkor a média hajlamos az élelmiszerárak ugrásszerű növekedését inkább a feltörekvő gazdaságok (pl. Kína és India) élelmiszer-fogyasztási szerkezete átalakulásának és a bioüzemanyag-gyártás...
Tipo: Journal Article
Palavras-chave: Élelmiszerárak; Fogyasztási struktúra; Bioüzemanyag-gyártás; GM növények; Agrárpolitika; Food prices; Structure of consumption; Manufacture of bio-fuels; GM crops; Agricultural politics; Agricultural and Food Policy; Environmental Economics and Policy; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/58897

ESONET - European Seas Observatory NETwork. Network of Excellence (NoE). Periodic activity report : version #1 30 June 2009
Provedor de dados: 5
Autores: Puillat, Ingrid; Lietard, Cecile; Rolin, Jean-francois; Person, Roland.
During the first year, the main ESONET working groups were constituted at WP level and the core groups of each ESONET node were initiated with varying progress. The related activities were starting in WPs and in some regions but not all. Consequently the main general objectives of this 2nd reported period were:  - to increase the level of integration on regional nodes by encouraging the involvement of the partners associated with nodes to participate in ESONET activities, for instance by encouraging the submission of proposals for the 2nd call for demo missions. - to encourage the level of integration across ESONET nodes, for instance by preparing a more formal call for exchange of personnel. WP leaders also made efforts to increase participation in their...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00151/26221/24292.pdf

Evaluation du taux de survie des captures indésirées de langoustines "Nephrops norvegicus" pêchées au chalut de fond dans le golfe de Gascocgne
Provedor de dados: 5
Autores: Merillet, Laurene; Kopp, Dorothee; Morandeau, Fabien; Mehault, Sonia; Rimaud, Thomas; Piton, C.
In the context of the reform of the Common Fishing Policy (CFP) undertaken by the European Union and implemented since 1st January 2014, the discarding of unwanted catches will gradually be forbidden. Article 15 of the CFP lays down a landing obligation for all species subject to European quotas and will come into force between 2015 and 2019 according to the species and the zones. The Regulation allows several exemptions including one for "species for which scientific proof shows high survival rates, due to the characteristics of the fishing gear, the fishing methods and the ecosystem" (EU Regulation No. 1380/2013). In particular, Nephrops were identified by the International Council for the Exploration of the Sea (ICES) as one of the species having the...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00378/48953/49357.pdf

Structure, root systems and periodicity of savanna plants and vegetations in Northern Surinam
Provedor de dados: 16
Autores: Donselaar-ten Bokkel Huinink, W.A.E. van.
From July 1958 to May 1959 an investigation was carried out of the relation between physiognomic characteristics of the vegetation and the habitat on some savannas in the vicinity of Zanderij, Surinam. Root systems, structure, periodicity and characteristics of the leaves were considered, both of the species separately and of the vegetation types. Nine vegetation types were studied which were described floristically by Heyligers (1963) and Van Donselaar (1965). The vegetation types differ in structure. The available types of structure are: low and sparse vegetation of tussocks of grasses and sedges; dense vegetation of both low and high tussocks of grasses and sedges; high and closed vegetation of tussocks of grasses and sedges, with or without a...
Tipo: Article / Letter to the editor
Ano: 1966
URL: http://www.repository.naturalis.nl/record/534725

Proeven over den invloed van golven op een strand. In verband met enkele waarnemingen aan de Nederlandsche kust
Provedor de dados: 16
Autores: Timmermans, P.D.
In order to throw more light on the formation of submarine bars and offshore bars or barrier beaches and the minor shore forms beach cusps and ripple marks a series of experiments was made in the new laboratory for experimental geology of the Geological Institution of the University at Leiden. The experiments were carried out in a tank, measuring six by four meters and half a meter in depth in which waves could be produced artificially varying in height from two to about twelf centimeters. The effects of waves on sandy beaches running parallel to or approaching the beach at an angle of fifteen degrees were traced, the beach itself having a slope of two, four or six degrees. Finally especially to detect possible rules for the formation of beach cusps in...
Tipo: Article / Letter to the editor
Ano: 1933
URL: http://www.repository.naturalis.nl/record/505868

Biología, ecología y explotación de la raya platana Atlantoraja platana (Günther, 1880), (Chondrichthyes, Rajidae), del golfo San Matías
Provedor de dados: 20
Autores: Coller, N.M.
La “raya platana” (Atlantoraja platana), es una especie endémica del Atlántico Sudoccidental, habita desde los 22º S (Uruguay y sur de Brasil) hasta los 42º S, región del Golfo San Matías (Argentina). El área de estudio del presente trabajo fue el Golfo San Matías (41º- 42º S y 64º- 65º O). El material analizado (778 hembras y 709 machos) fue colectado durante muestreos mensuales de las capturas desembarcadas por los barcos pesqueros de la flota local (muestreos de desembarque); muestras extraídas a bordo de las embarcaciones pesqueras por el programa de observadores a bordo, durante los años 2004 y 2005 y los meses de marzo, abril y mayo de 2006; y durante la realización de campañas de investigación pesquera (primavera de 2004, 2005 y 2006). Se describió...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Ecology; Feeding behaviour; Age (biological); Growth; Coastal environment; Morphology (animal); Reproduction (biology); Spatial distribution; Population dynamics; Abundance.
Ano: 2012
URL: http://hdl.handle.net/1834/5235

Welfare benchmarking and herd health plans on organic dairy farms (OF0343)
Provedor de dados: 21
Autores: Anon,.
Introduction  In response to the recommendations of recent studies on the health and welfare of dairy cattle (Whay et al. 2003) and to assist farmers to meet legislative requirements, promoting farm animal welfare and meeting consumer demand, this study investigated, by means of farmer interviews, the effectiveness of herd health and welfare assessment and benchmarking as a farm management tool. The aims of the study were to  • offer support to the organic farming sector and provide detail relevant to all dairy farms utilising herd health plans;   • provide information to both organic dairy farmers and their veterinary advisors on the most important elements of herd health plans and the benefits of their effective implementation; and   • identify the...
Tipo: Report
Palavras-chave: Dairy cattle; Knowledge management; Health and welfare.
Ano: 2005
URL: http://orgprints.org/10776/1/welfare_benchmarking_and_herd_health_plans_on_organic_dairy_farms_of0343.pdf

The use of homeopathic nosodes in the prevention of mastitis in organic dairy herds (OF0186)
Provedor de dados: 21
Autores: Anon,.
Mastitis is the most significant disease affecting the health, welfare and economic productivity of dairy cattle and is recognised by Defra as a major economic and welfare concern. Research into the efficacy of homeopathic treatments and of management control of mastitis on organic dairy farms have both been identified as research priorities in recent Defra funded reviews of organic dairy farming.  This study examined the use of a specific mode of homeopathic treatment in the prevention of mastitis and quantified the effect that the year-round, prophylactic use of nosodes, supplied to the cattle in the drinking water, had on the number of clinical cases of mastitis on somatic cell counts within herds.    Context and background  Organic dairy farming is a...
Tipo: Report
Palavras-chave: Dairy cattle; Technology transfer; Health and welfare.
Ano: 2005
URL: http://orgprints.org/10774/1/the_use_of_homeopathic_nosodes_in_the_prevention_of_mastitis_within_organic_dairy_herdsof0186.pdf

Subsistence Agriculture in Central and Eastern Europe: How to Break the Vicious Circle?
Provedor de dados: 31
Autores: Abele,   Steffen; Frohberg,   Klaus.
Subsistence agriculture is probably the least understood and the most neglected type of agriculture. In a globalised, market-driven world, it remains at the same time a myth and a marginal phenomenon. Empirically, subsistence agriculture for a long time seemed to be restricted to developing countries, with only a few cases reported in Western Europe (CAILLAVET and NICHELE 1999; THIEDE 1994). Governmental support offered to subsistence agriculture was mainly done through agricultural development policies, the main objective being to have subsistence farmers participate in markets. The strategy was to make farmers produce more by introducing new technologies and consequently bring their output to the market. Failures of such attempts were numerous, yet...
Tipo: Book
Palavras-chave: Agribusiness; Community/Rural/Urban Development; Consumer/Household Economics; Farm Management; Financial Economics; Institutional and Behavioral Economics.
Ano: 2004
URL: http://purl.umn.edu/93082

Bases para o estudo da genética de populações dos Hymenoptera em geral e dos Apinae sociais em particular
Provedor de dados: 43
Autores: Kerr,Warwick E.
This paper deals with problems on population genetics in Hymenoptera and particularly in social Apidae. 1) The studies on populations of Hymenoptera were made according to the two basic types of reproduction: endogamy and panmixia. The populations of social Apinae have a mixed method of reproduction with higher percentage of panmixia and a lower of endogamy. This is shown by the following a) males can enter any hive in swarming time; b) males of Meliponini are expelled from hives which does not need them, and thus, are forced to look for some other place; c) Meliponini males were seen powdering themselves with pollen, thus becoming more acceptable in any other hive. The panmixia is not complete owing to the fact that the density of the breeding population...
Tipo: Info:eu-repo/semantics/article
Ano: 1951
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761951000100014

Progagación in vitro de Mammillaria coahuilensis var. coahuilensis (Boedeker) Moran y Echinocactus platyacanthus Link &amp; Otto a partir de semilla para su conservación.
Provedor de dados: 32
Autores: Manzo Rodríguez, Sinai Mariana.
Se conoce relativamente poco de la propagación de las cactáceas in vitro. Generalmente se utiliza la semilla, tejido vascular y la activación de las areolas. Sin embargo, son pocas las especies que se multiplican y se preservan por estos medios de propagación. Mammillaria coahuilensis var. coahuilensis (Boedeker) Moran es endémica de Coahuila, Méx. y ha sido sobre recolectada por su valor como planta de ornato y Echinocactus platyacanthus Link &amp; Otto se distribuye del centro al norte del país, a pesar de su amplia presencia, es una especie sobre explotada, principalmente para la elaboración de dulce (acitrón) y como alimento para el ganado. Por esta actividad humana ha sido difícil conseguir planta y al igual que la semilla y por lo tanto se reduce la...
Palavras-chave: Endémica; Reguladores de crecimiento; Medio MS; Vitrificación; Echinocactus platyacanthus; Mammillaria coahuilensis var. coahuilensis; Maestría; Fruticultura.
Ano: 2010
URL: http://hdl.handle.net/10521/156

Progagación in vitro de Mammillaria coahuilensis var. coahuilensis (Boedeker) Moran y Echinocactus platyacanthus Link &amp; Otto a partir de semilla para su conservación.
Provedor de dados: 32
Autores: Manzo Rodríguez, Sinai Mariana.
Se conoce relativamente poco de la propagación de las cactáceas in vitro. Generalmente se utiliza la semilla, tejido vascular y la activación de las areolas. Sin embargo, son pocas las especies que se multiplican y se preservan por estos medios de propagación. Mammillaria coahuilensis var. coahuilensis (Boedeker) Moran es endémica de Coahuila, Méx. y ha sido sobre recolectada por su valor como planta de ornato y Echinocactus platyacanthus Link &amp; Otto se distribuye del centro al norte del país, a pesar de su amplia presencia, es una especie sobre explotada, principalmente para la elaboración de dulce (acitrón) y como alimento para el ganado. Por esta actividad humana ha sido difícil conseguir planta y al igual que la semilla y por lo tanto se reduce la...
Palavras-chave: Endémica; Reguladores de crecimiento; Medio MS; Vitrificación; Echinocactus platyacanthus; Mammillaria coahuilensis var. coahuilensis; Maestría; Fruticultura.
Ano: 2010
URL: http://hdl.handle.net/10521/156

Report of the Expert Meeting on Ciguatera Poisoning. Rome, 19–23 November 2018
Provedor de dados: 5
Autores: FAO; WHO.
Ciguatera poisoning (CP) is reported in historical documents of the sixteenth century. The first report of the organism Gambierdiscus (originally referred to as Goniodoma sp.) dates from October 1948, in Cabo Verde. Today, the term ciguatera identifies poisoning caused by the ingestion of certain reef fish and shellfish from tropical and subtropical regions, especially the South Pacific Ocean, Indian Ocean and the Caribbean Sea. Through the food chain, these fish and shellfish have accumulated certain lipid‑soluble toxins (ciguatoxins [CTXs]) that are produced by dinoflagellates of the genera Gambierdiscus and Fukuyoa. Ciguatera is a worldwide problem that is expanding due, among other reasons, to climate change. In general, CP can be regarded as the most...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00635/74708/74653.pdf

Report of the Working Group on Biology and Assessment of Deep-sea Fisheries Resources (WGDEEP). 20–27 March 2015 Copenhagen, Denmark
Provedor de dados: 5
Autores: ICES.
WGDEEP met at ICES Headquarters in Copenhagen, Denmark on 20–27 March 2015. The group was chaired by Pascal Lorance from France and Gudmundur Thordarson from Iceland. Terms of Reference of the Working Group are given in Section 2. WGDEEP gives advice according to an advice schedule where, in short, half of the stocks advice is given in year y and the other half has advice in year y+1. The excep-tion from this schedule is stocks from Va (Iceland) that have advice annually. Availa-ble time-series for international landings and discards, fishing effort, survey indices and biological information were updated and for all stocks and are presented in Sec-tions 4 to 14 of the report. Significant discrepancies found in previous years for some fisheries between...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00276/38705/37214.pdf

Pollenanalytisch en Geologisch onderzoek van het Onder- en Midden-Pleistoceen van Noord-Nederland
Provedor de dados: 16
Autores: Brouwer, A.
Pollen analytical and geological investigations of the Lower and Middle Pleistocene in the Northern Netherlands. The Pleistocene deposits in the northern part of the Netherlands, form through their extreme thickness up to more than 300 m, a promising object for study from the stratigraphical point of view. The boulder clay of the penultimate glaciation lies in the province of Drente at or near the surface, but in northerly and westerly directions it dips away beneath Upper Pleistocene and Holocene deposits. The Pleistocene deposits below this boulder clay form the subject of the present paper. In the first chapter the existing opinions regarding the stratigraphy are briefly reviewed. Van Cappelle (1888, 1891, 1892a, 1892b) and Lorié (1887a, 1893, 1899)...
Tipo: Article / Letter to the editor
Ano: 1949
URL: http://www.repository.naturalis.nl/record/506021

Controlling internal parasites without anthelmintics (a review) OF0132
Provedor de dados: 21
Autores: Keatinge, Mr Ray.
1.0 Executive summary    1. Internal parasites are a major source of economic loss in grazing ruminants. To a greater or lesser degree, most farms in the UK rely on anthelmintics for control. In most situations these products continue to be highly effective, but anthelmintic resistance is increasing to the limited range of products available, raising serious concerns over the future of worm control.     2. Internal parasites are also of concern on organic farms, where the prophylactic use of anthelmintic is prohibited by the standards for organic production. Organic farms generally rely on grazing management, with restricted use of anthelmintic if required. However, also within the regulations is the absolute requirement to treat individual animals if this...
Tipo: Report
Palavras-chave: Health and welfare.
Ano: 1996
URL: http://orgprints.org/9909/1/Controlling_internal_parasites_without_antelmintics_(a_review)_OF0132.pdf

Large expert-curated database for benchmarking document similarity detection in biomedical literature search
Provedor de dados: 5
Autores: Brown, Peter; Tan, Aik-choon; El-esawi, Mohamed A.; Liehr, Thomas; Blanck, Oliver; Gladue, Douglas P.; Almeida, Gabriel M. F.; Cernava, Tomislav; Sorzano, Carlos O.; Yeung, Andy W. K.; Engel, Michael S.; Chandrasekaran, Arun Richard; Muth, Thilo; Staege, Martin S.; Daulatabad, Swapna V.; Widera, Darius; Zhang, Junpeng; Meule, Adrian; Honjo, Ken; Pourret, Olivier; Yin, Cong-cong; Zhang, Zhongheng; Cascella, Marco; Flegel, Willy A.; Goodyear, Carl S.; Van Raaij, Mark J.; Bukowy-bieryllo, Zuzanna; Campana, Luca G.; Kurniawan, Nicholas A.; Lalaouna, David; Huttner, Felix J.; Ammerman, Brooke A.; Ehret, Felix; Cobine, Paul A.; Tan, Ene-choo; Han, Hyemin; Xia, Wenfeng; Mccrum, Christopher; Dings, Ruud P. M.; Marinello, Francesco; Nilsson, Henrik; Nixon, Brett; Voskarides, Konstantinos; Yang, Long; Costa, Vincent D.; Bengtsson-palme, Johan; Bradshaw, William; Grimm, Dominik G.; Kumar, Nitin; Martis, Elvis; Prieto, Daniel; Sabnis, Sandeep C.; Amer, Said E. D. R.; Liew, Alan W. C.; Perco, Paul; Rahimi, Farid; Riva, Giuseppe; Zhang, Chongxing; Devkota, Hari P.; Ogami, Koichi; Basharat, Zarrin; Fierz, Walter; Siebers, Robert; Tan, Kok-hian; Boehme, Karen A.; Brenneisen, Peter; Brown, James A. L.; Dalrymple, Brian P.; Harvey, David J.; Ng, Grace; Werten, Sebastiaan; Bleackley, Mark; Dai, Zhanwu; Dhariwal, Raman; Gelfer, Yael; Hartmann, Marcus D.; Miotla, Pawel; Tamaian, Radu; Govender, Pragashnie; Gurney-champion, Oliver J.; Kauppila, Joonas H.; Zhang, Xiaolei; Echeverria, Natalia; Subhash, Santhilal; Sallmon, Hannes; Tofani, Marco; Bae, Taeok; Bosch, Oliver; Cuiv, Paraic O.; Danchin, Antoine; Diouf, Barthelemy; Eerola, Tuomas; Evangelou, Evangelos; Filipp, Fabian V.; Klump, Hannes; Kurgan, Lukasz; Smith, Simon S.; Terrier, Olivier; Tuttle, Neil; Ascher, David B.; Janga, Sarath C.; Schulte, Leon N.; Becker, Daniel; Browngardt, Christopher; Bush, Stephen J.; Gaullier, Guillaume; Ide, Kazuki; Meseko, Clement; Werner, Gijsbert D. A.; Zaucha, Jan; Al-farha, Abd A.; Greenwald, Noah F.; Popoola, Segun I.; Rahman, Md Shaifur; Xu, Jialin; Yang, Sunny Y.; Hiroi, Noboru; Alper, Ozgul M.; Baker, Chris I.; Bitzer, Michael; Chacko, George; Debrabant, Birgit; Dixon, Ray; Forano, Evelyne; Gilliham, Matthew; Kelly, Sarah; Klempnauer, Karl-heinz; Lidbury, Brett A.; Lin, Michael Z.; Lynch, Iseult; Ma, Wujun; Maibach, Edward W.; Mather, Diane E.; Nandakumar, Kutty S.; Ohgami, Robert S.; Parchi, Piero; Tressoldi, Patrizio; Xue, Yu; Armitage, Charles; Barraud, Pierre; Chatzitheochari, Stella; Coelho, Luis P.; Diao, Jiajie; Doxey, Andrew C.; Gobet, Angelique; Hu, Pingzhao; Kaiser, Stefan; Mitchell, Kate M.; Salama, Mohamed F.; Shabalin, Ivan G.; Song, Haijun; Stevanovic, Dejan; Yadollahpour, Ali; Zeng, Erliang; Zinke, Katharina; Alimba, C. G.; Beyene, Tariku J.; Cao, Zehong; Chan, Sherwin S.; Gatchell, Michael; Kleppe, Andreas; Piotrowski, Marcin; Torga, Gonzalo; Woldesemayat, Adugna A.; Cosacak, Mehmet I.; Haston, Scott; Ross, Stephanie A.; Williams, Richard; Wong, Alvin; Abramowitz, Matthew K.; Effiong, Andem; Lee, Senhong; Abid, Muhammad Bilal; Agarabi, Cyrus; Alaux, Cedric; Albrecht, Dirk R.; Atkins, Gerald J.; Beck, Charles R.; Bonvin, A. M. J. J.; Bourke, Emer; Brand, Thomas; Braun, Ralf J.; Bull, James A.; Cardoso, Pedro; Carter, Dee; Delahay, Robin M.; Ducommun, Bernard; Duijf, Pascal H. G.; Epp, Trevor; Eskelinen, Eeva-liisa; Fallah, Mazyar; Farber, Debora B.; Fernandez-triana, Jose; Feyerabend, Frank; Florio, Tullio; Friebe, Michael; Furuta, Saori; Gabrielsen, Mads; Gruber, Jens; Grybos, Malgorzata; Han, Qian; Heinrich, Michael; Helantera, Heikki; Huber, Michael; Jeltsch, Albert; Jiang, Fan; Josse, Claire; Jurman, Giuseppe; Kamiya, Haruyuki; De Keersmaecker, Kim; Kristiansson, Erik; De Leeuw, Frank-erik; Li, Jiuyong; Liang, Shide; Lopez-escamez, Jose A.; Lopez-ruiz, Francisco J.; Marchbank, Kevin J.; Marschalek, Rolf; Martin, Carmen S.; Miele, Adriana E.; Montagutelli, Xavier; Morcillo, Esteban; Nicoletti, Rosario; Niehof, Monika; O'Toole, Ronan; Ohtomo, Toshihiko; Oster, Henrik; Palma, Jose-alberto; Paterson, Russell; Peifer, Mark; Portilla, Maribel; Portillo, M. C.; Pritchard, Antonia L.; Pusch, Stefan; Raghava, Gajendra P. S.; Roberts, Nicola J.; Ross, Kehinde; Schuele, Birgitt; Sergeant, Kjell; Shen, Jun; Stella, Alessandro; Sukocheva, Olga; Uversky, Vladimir N.; Vanneste, Sven; Villet, Martin H.; Viveiros, Miguel; Vorholt, Julia A.; Weinstock, Christof; Yamato, Masayuki; Zabetakis, Ioannis; Zhao, Xin; Ziegler, Andreas; Aizat, Wan M.; Atlas, Lauren; Bridges, Kristina M.; Chakraborty, Sayan; Deschodt, Mieke; Domingues, Helena S.; Esfahlani, Shabnam S.; Falk, Sebastian; Guisado, J. L.; Kane, Nolan C.; Kueberuwa, Gray; Lau, Colleen L.; Liang, Dai; Liu, Enwu; Luu, Andreas M.; Ma, Chuang; Ma, Lisong; Moyer, Robert; Norris, Adam D.; Panthee, Suresh; Parsons, Jerod R.; Peng, Yousong; Pinto, Ines Mendes; Reschke, Cristina R.; Sillanpaa, Elina; Stewart, Christopher J.; Uhle, Florian; Yang, Hui; Zhou, Kai; Zhu, Shu; Ashry, Mohamed; Bergsland, Niels; Berthold, Maximilian; Chen, Chang-er; Colella, Vito; Cuypers, Maarten; Eskew, Evan A.; Fan, Xiao; Gajda, Maksymilian; Gonzalezlez-prendes, Rayner; Goodin, Amie; Graham, Emily B.; Groen, Ewout J. N.; Gutierrez-sacristan, Alba; Habes, Mohamad; Heffler, Enrico; Higginbottom, Daniel B.; Janzen, Thijs; Jayaraman, Jayakumar; Jibb, Lindsay A.; Jongen, Stefan; Kinyanjui, Timothy; Koleva-kolarova, Rositsa G.; Li, Zhixiu; Liu, Yu-peng; Lund, Bjarte A.; Lussier, Alexandre A.; Ma, Liping; Mier, Pablo; Moore, Matthew D.; Nagler, Katja; Orme, Mark W.; Pearson, James A.; Prajapati, Anilkumar S.; Saito, Yu; Troder, Simon E.; Uchendu, Florence; Verloh, Niklas; Voutchkova, Denitza D.; Abu-zaid, Ahmed; Bakkach, Joaira; Baumert, Philipp; Dono, Marcos; Hanson, Jack; Herbelet, Sandrine; Hobbs, Emma; Kulkarni, Ameya; Kumar, Narendra; Liu, Siqi; Loft, Nikolai D.; Reddan, Tristan; Senghore, Thomas; Vindin, Howard; Xu, Haotian; Bannon, Ross; Chen, Branson; Cheung, Johnny T. K.; Cooper, Jeffrey; Esnakul, Ashwini K.; Feghali, Karine A.; Ghelardi, Emilia; Gnasso, Agostino; Horbar, Jeffrey; Lai, Hei M.; Li, Jian; Ma, Lan; Ma, Ruiyan; Pan, Zihang; Peres, Marco A.; Pranata, Raymond; Seow, Esmond; Sydes, Matthew; Testoni, Ines; Westermair, Anna L.; Yang, Yongliang; Afnan, Masoud; Albiol, Joan; Albuquerque, Lucia G.; Amiya, Eisuke; Amorim, Rogerio M.; An, Qianli; Andersen, Stig U.; Aplin, John D.; Argyropoulos, Christos; Asmann, Yan W.; Assaeed, Abdulaziz M.; Atanasov, Atanas G.; Atchison, David A.; Avery, Simon V.; Avillach, Paul; Baade, Peter D.; Backman, Lars; Badie, Christophe; Baldi, Alfonso; Ball, Elizabeth; Bardot, Olivier; Barnett, Adrian G.; Basner, Mathias; Batra, Jyotsna; Bazanova, O. M.; Beale, Andrew; Beddoe, Travis; Bell, Melanie L.; Berezikov, Eugene; Berners-price, Sue; Bernhardt, Peter; Berry, Edward; Bessa, Theolis B.; Billington, Craig; Birch, John; Blakely, Randy D.; Blaskovich, Mark A. T.; Blum, Robert; Boelaert, Marleen; Bogdanos, Dimitrios; Bosch, Carles; Bourgoin, Thierry; Bouvard, Daniel; Boykin, Laura M.; Bradley, Graeme; Braun, Daniel; Brownlie, Jeremy; Bruhl, Albert; Burt, Austin; Butler, Lisa M.; Byrareddy, Siddappa N.; Byrne, Hugh J.; Cabantous, Stephanie; Calatayud, Sara; Candal, Eva; Carlson, Kimberly; Casillas, Sonia; Castelvetro, Valter; Caswell, Patrick T.; Cavalli, Giacomo; Cerovsky, Vaclav; Chagoyen, Monica; Chen, Chang-shi; Chen, Dong F.; Chen, Hao; Chen, Hui; Chen, Jui-tung; Chen, Yinglong; Cheng, Changxiu; Cheng, Jianlin; Chinapaw, Mai; Chinopoulos, Christos; Cho, William C. S.; Chong, Lillian; Chowdhury, Debashish; Chwalibog, Andre; Ciresi, A.; Cockcroft, Shamshad; Conesa, Ana; Cook, Penny A.; Cooper, David N.; Coqueret, Olivier; Corea, Enoka M.; Costa, Elisio; Coupland, Carol; Crawford, Stephanie Y.; Cruz, Aparecido D.; Cui, Huijuan; Cui, Qiang; Culver, David C.; D'Angiulli, Amedeo; Dahms, Tanya E. S.; Daigle, France; Dalgleish, Raymond; Danielsen, Havard E.; Darras, Sebastien; Davidson, Sean M.; Day, David A.; Degirmenci, Volkan; Demaison, Luc; Devriendt, Koenraad; Ding, Jiandong; Dogan, Yunus; Dong, X. C.; Donner, Claudio F.; Dressick, Walter; Drevon, Christian A.; Duan, Huiling; Ducho, Christian; Dumaz, Nicolas; Dwarakanath, Bilikere S.; Ebell, Mark H.; Eisenhardt, Steffen; Elkum, Naser; Engel, Nadja; Erickson, Timothy B.; Fairhead, Michael; Faville, Marty J.; Fejzo, Marlena S.; Festa, Fernanda; Feteira, Antonio; Flood-page, Patrick; Forsayeth, John; Fox, Simon A.; Franks, Steven J.; Frentiu, Francesca D.; Frilander, Mikko J.; Fu, Xinmiao; Fujita, Satoshi; Galea, Ian; Galluzzi, Luca; Gani, Federica; Ganpule, Arvind P.; Garcia-alix, Antonio; Gedye, Kristene; Giordano, Maurizio; Giunta, Cecilia; Gleeson, Paul A.; Goarant, Cyrille; Gong, Haipeng; Gora, Diop; Gough, Michael J.; Goyal, Ravinder; Graham, Kathryn E.; Grande-perez, Ana; Graves, Patricia M.; Greidanus, Harm; Grice, Darren; Grunau, Christoph; Gumulya, Yosephine; Guo, Yabin; Gurevich, Vsevolod V.; Gusev, Oleg; Hacker, Elke; Hage, Steffen R.; Hagen, Guy; Hahn, Steven; Haller, Dagmar M.; Hammerschmidt, Sven; Han, Jianwei; Han, Renzhi; Handfield, Martin; Hapuarachchi, Hapuarachchige C.; Harder, Timm; Hardingham, Jennifer E.; Heck, Michelle; Heers, Marcel; Hew, Khe F.; Higuchi, Yohei; St Hilaire, Cynthia; Hilton, Rachel; Hodzic, Enisa; Hone, Andrew; Hongoh, Yuichi; Hu, Guoku; Huber, Heinz P.; Hueso, Luis E.; Huirne, Judith; Hurt, Lisa; Idborg, Helena; Ikeo, Kazuho; Ingley, Evan; Jakeman, Philip M.; Jensen, Arne; Jia, Hong; Jia, Husen; Jia, Shuqin; Jiang, Jianping; Jiang, Xingyu; Jin, Yi; Jo, Daehyun; Johnson, Andrew M.; Johnston, Marie; Jonscher, Karen R.; Jorens, Philippe G.; Jorgensen, Jens O. L.; Joubert, Johan W.; Jung, Sin-ho; Junior, Antonio M.; Kahan, Thomas; Kamboj, Sunjeev K.; Kang, Yong-kook; Karamanos, Yannis; Karp, Natasha A.; Kelly, Ryan; Kenna, Ralph; Kennedy, Jonathan; Kersten, Birgit; Khalaf, Roy A.; Khalid, Javaria M.; Khatlani, T.; Khider, Tarig; Kijanka, Gregor S.; King, Sarah R. B.; Kluz, Tomasz; Knox, Paul; Kobayashi, Tatsuya; Koch, Karl-wilhelm; Kohonen-corish, Maija R. J.; Kong, Xiangpeng; Konkle-parker, Deborah; Korpela, Kalevi M.; Kostrikis, Leondios G.; Kraiczy, Peter; Kratz, Harald; Krause, Gunter; Krebsbach, Paul H.; Kristensen, Soren R.; Kumari, Prerna; Kunimatsu, Akira; Kurdak, Hatice; Kwon, Young D.; Lachat, Carl; Lagisz, Malgorzata; Laky, Brenda; Lammerding, Jan; Lange, Matthias; Larrosa, Mar; Laslett, Andrew L.; Leclair, Elizabeth E.; Lee, Kyung-woo; Lee, Ming-yih; Lee, Moon-soo; Li, Genyuan; Li, Jiansheng; Lieb, Klaus; Lim, Yau Y.; Lindsey, Merry L.; Line, Paul-dag; Liu, Dengcai; Liu, Fengbin; Liu, Haiyan; Liu, Hongde; Lloyd, Vett K.; Lo, Te-wen; Locci, Emanuela; Loidl, Josef; Lorenzen, Johan; Lorkowski, Stefan; Lovell, Nigel H.; Lu, Hua; Lu, Wei; Lu, Zhiyong; Luengo, Gustavo S.; Lundh, Lars-gunnar; Lysy, Philippe A.; Mabb, Angela; Mack, Heather G.; Mackey, David A.; Mahdavi, S. R.; Maher, Pamela; Maher, Toby; Maity, Sankar N.; Malgrange, Brigitte; Mamoulakis, Charalampos; Mangoni, Arduino A.; Manke, Thomas; Manstead, Antony S. R.; Mantalaris, Athanasios; Marsal, Jan; Marschall, Hanns-ulrich; Martin, Francis L.; Martinez-raga, Jose; Martinez-salas, Encarnacion; Mathieu, Daniel; Matsui, Yoichi; Maza, Elie; Mccutcheon, James E.; Mckay, Gareth J.; Mcmillan, Brian; Mcmillan, Nigel; Meads, Catherine; Medina, Loreta; Merrick, B. Alex; Metzger, Dennis W.; Meunier, Frederic A.; Michaelis, Martin; Micheau, Olivier; Mihara, Hisaaki; Mintz, Eric M.; Mizukami, Takuo; Moalic, Yann; Mohapatra, D. 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N.; Moultos, Othonas A.; Mukherjee, Maheswari; Nakayama, Kazuhiko; Narayan, Edward; Navaratnarajah,; Neumann, Philipp-alexander; Nie, Jiyun; Nie, Yingjiu; Niemeyer, Frank; Fiona,; Nwaiwu, Ogueri; Oldenmenger, Wendy H.; Olumayede, Emmanuel; Ou, Jianhong; Pallebage-gamarallage, Menuka; Pearce, Simon P.; Pelkonen, Tuula; Pelleri, Maria C.; Pereira, Joana L.; Pheko, Mpho; Pinto, Karina A.; Piovesan, Allison; Pluess, Michael; Podolsky, Illya M.; Prescott, Julie; Qi, Dongchen; Qi, Xingshun; Raikou, Vaia D.; Ranft, Andreas; Rhodes, Johanna; Rotge, Jean-yves; Rowe, Anna D.; Saggar, Manish; Schuon, Robert A.; Shahid, Shaouli; Shalchyan, Vahid; Shirvalkar, Prasad; Shiryayev, Oleg; Singh, Jugpreet; Smout, Michael J.; Soares, Antonio; Song, Chunjiao; Srivastava, Kshitij; Srivastava, Rupesh K.; Sun, Jim; Szabo, Attila; Szymanski, Wiktor; Tai, Chan N. 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Document recommendation systems for locating relevant literature have mostly relied on methods developed a decade ago. This is largely due to the lack of a large offline gold-standard benchmark of relevant documents that cover a variety of research fields such that newly developed literature search techniques can be compared, improved and translated into practice. To overcome this bottleneck, we have established the RElevant LIterature SearcH consortium consisting of more than 1500 scientists from 84 countries, who have collectively annotated the relevance of over 180 000 PubMed-listed articles with regard to their respective seed (input) article/s. The majority of annotations were contributed by highly experienced, original authors of the seed articles....
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00659/77117/78538.pdf