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A comparative study of the Bivalvia (Mollusca) from the continental shelves of Antarctica and Brazil Biota Neotropica
Passos,Flávio Dias; Magalhães,Frederico Thomaisino.
During identification of bivalve molluscs collected in Antarctica, a rich taxonomic bibliography was gathered, stimulating comparisons with the Brazilian malacofauna. We listed a total of 68 and 368 known shallow-water species (less than 200 m depth) from Antarctica and Brazil, respectively, in order to find species, families and superfamilies in common, and to investigate how these malacofaunas differ in regard to these representative groups and their life habits. There are 23 superfamilies absent in Antarctica, but present in Brazil with at least one species; the reverse does not occur, as all superfamilies known from Antarctica are also recorded from Brazil. The number of Brazilian species is higher, being composed of a mixture of taxa from different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Checklist; Shallow waters; Brazilian fauna; Antarctic fauna.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100014
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A comparative study of tocopherols composition and antioxidant properties of in vivo and in vitro ectomycorrhizal fungi IPB - Escola Superior Agrária
Reis, Filipa S.; Ferreira, Isabel C.F.R.; Barros, Lillian; Martins, Anabela.
In aerobic organisms, the free radicals are constantly being produced during the normal cellular metabolism. The antioxidant properties of many organisms and particularly of wild mushrooms with their content in antioxidant compounds such as tocopherols, can detoxify potentially damaging forms of activated oxygen. Herein, a comparative study of tocopherols composition and antioxidant properties of in vivo (fruiting bodies) and in vitro (mycelia) ectomycorrhizal fungi: Paxillus involutus and Pisolithus arhizus. Tocopherols were determined by high performance liquid chromatography (HPLC) coupled to a fluorescence detector. The antioxidant properties were studied in terms of DPPH radical-scavenging activity, reducing power and inhibition of β-carotene...
Tipo: Article Palavras-chave: Paxillus involutus; Pisolithus arhizus; Fruiting bodies/mycelia; Tocopherols; HPLC-fluorescence; Antioxidant activity.
Ano: 2011 URL: http://hdl.handle.net/10198/3880
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A comparative study on the production of ethanol from lignocellulosic biomass by chemical and biological method Nature Precedings
Shaheed SM; Rohit JP; Madhan R; Selvakumar K.
Ethanol derived from non-edible biomass is renewable and a clean source of energy. It is independent of the food industry and it is economically feasible. The first generation biofuel or bioethanol is still not a very convenient source of energy as it prominently depends on the availability of grains. The main objective of this work is to develop an industrious efficient process to produce ethanol from lignocellulosic biomasses like wood and leaf in a lab scale. Two processes were compared. The first process involved an alkaline pre-treatment of the powdered biomass followed by dilute acid hydrolysis. The second process involved an alkaline treatment followed by direct hydrolysis of the biomass by use of a fungal species obtained from rotting wood....
Tipo: Manuscript Palavras-chave: Biotechnology.
Ano: 2011 URL: http://precedings.nature.com/documents/6579/version/1
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A comparison between Joint Regression Analysis and the Additive Main and Multiplicative Interaction model: the robustness with increasing amounts of missing data Scientia Agricola
Rodrigues,Paulo Canas; Pereira,Dulce Gamito Santinhos; Mexia,João Tiago.
This paper joins the main properties of joint regression analysis (JRA), a model based on the Finlay-Wilkinson regression to analyse multi-environment trials, and of the additive main effects and multiplicative interaction (AMMI) model. The study compares JRA and AMMI with particular focus on robustness with increasing amounts of randomly selected missing data. The application is made using a data set from a breeding program of durum wheat (Triticum turgidum L., Durum Group) conducted in Portugal. The results of the two models result in similar dominant cultivars (JRA) and winner of mega-environments (AMMI) for the same environments. However, JRA had more stable results with the increase in the incidence rates of missing values.
Tipo: Info:eu-repo/semantics/article Palavras-chave: AMMI models; Genotype by environment interaction; Joint regression analysis; Missing values; Durum wheat.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000600012
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"A comparison between sugar consumption and ethanol production in wort by immobilized Saccharomyces Cerevisiae, Saccharomyces Ludwigii and Saccharomyces Rouxii on Brewer's Spent Grain" BJM
Mohammadi,Aniseh; Razavi,Seyyed Hadi; Mousavi,Seyyed Mohammad; Rezaei,Karamatollah.
The immobilization of Saccharomyces cerevisiae DSM 70424, Saccharomyces ludwigii DSM 3447 and Saccharomyces rouxii DSM 2531 on brewer's spent grain and then ethanol production and sugar consumption of these immobilized yeasts were investigated. The aim of this study was to investigate the abilities of these three immobilized yeasts for producing alcohol for brewing at two temperatures (7 and 12 °C) using two different sugar levels (one at original level supplied in the brewery and one with 2.5% (w/v), added glucose to the wort). Increasing both parameters resulted in higher alcohol production by all the yeasts studied. At 7 °C and with original wort density the ethanol content at the end of fermentation was 2.7% (v/v) for S. cerevisiae, 1.7% for S....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brewer's spent grain; Fermentation; Immobilization; Saccharomyces cerevisiae; Saccharomyces ludwigii; Saccharomyces rouxii.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000200025
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A Comparison of Auction and Choice Experiment: An Application to Consumer Willingness to Pay for Rice with Improved Storage Management AgEcon
Su, Lianfan; Adam, Brian D.; Lusk, Jayson L.; Arthur, Frank.
Experimental auction and discrete choice experiment are two popular value elicitation methods. Theoretically they should yield the same results but empirical results have been mixed (e.g., Lusk and Schroeder 2004, 2006; Corrigan et al. 2010.) This study uses both methods to determine consumers’ willingness to pay (WTP) for rice with improved insect control and for rice stored using Integrated Pest Management (IPM). This study investigates two potential reasons – anchoring and information – for why some studies have found apparent inconsistencies between auction and choice experiment results. Results indicate that consumers’ WTP derived in the auction and choice experiments are significantly different. Consumers’ average bids in the auction are higher than...
Tipo: Conference Paper or Presentation Palavras-chave: 2nd price auction; Choice experiment; Price level; Information; Consumer/Household Economics; Crop Production/Industries.
Ano: 2011 URL: http://purl.umn.edu/103975
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A comparison of dung beetle assemblage structure (Coleoptera: Scarabaeidae: Scarabaeinae) between an Atlantic forest fragment and adjacent abandoned pasture in Paraná, Brazil Rev. Bras. Zool.
Lopes,José; Korasaki,Vanesca; Catelli,Lizandra L; Marçal,Viviani V. M; Nunes,Maria Paula B. P.
The study was conducted at the Mata dos Godoy State Park in Londrina, state of Paraná, Brazil. Baited pitfall traps were installed in the forest, in adjacent abandoned pasture land, and on the borders between these two environments. Every two weeks, from June 1999 to May 2000, the traps were placed for 24 hours and the material was collected every 12 hours. The 4687 specimens of Scarabaeinae collected belong to 13 genera and 27 species. The most frequent species were Onthophagus catharinensis (Paulian, 1936) (22.1%), Onthophagus hirculus (Mannerhein, 1829) (20.1%), Dichotomius mormon (Ljungh, 1799) (13.1%), Sulcophanaeus menelas (Laporte, 1840) (12.8%), and Eurystemus parallelus (Dalman, 1824) (10.6%). The other species collected amounted to less than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coprophagous beetle; Ecological indicator; Forest fragment; Pitfall; Scarabaeidae.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100011
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A comparison of foraging between the South American and Cabot's Tern in southern Brazil Biota Neotropica
Fracasso,Hélio Augusto Alves; Branco,Joaquim Olinto; Barbieri,Edison.
Despite being widely distributed in South America and having relatively large populations, little is known about the trophic ecology of the South American Tern (Sterna hirundinacea) and Cabot's Tern (Thalasseus acuflavidus). In Brazil, South American and Terns Cabot's breed in mixed colonies from the state of Espírito Santo to Santa Catarina. Here, we describe results of a study of the feeding ecology of these two species during the reproductive seasons of April to October of 2003, 2005 and 2006 from Cardos Island, Santa Catarina, Brazil. A total of 6248, 5140, and 4006 fishes were delivered to chicks or females by South American Terns; and 1157, 628 and 98 fish and or other prey items by Cabot's Terns during the breeding seasons of 2003, 2005, and 2006,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cabot's Terns; South American Terns; Feeding ecology; Prey; Foraging.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300016
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A Comparison of Imputation Methods under Large Samples and Different Censoring Levels (PowerPoint) AgEcon
Lopez, Jose Antonio.
PowerPoint Presentation
Tipo: Conference Paper or Presentation Palavras-chave: Imputation methods; Multiple imputation; Censored prices; Protein demand; Elasticities; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Research Methods/ Statistical Methods; C81; Q11; R21.
Ano: 2011 URL: http://purl.umn.edu/109894
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A comparison of Indonesian and Vietnamese approaches to agriculture in the ASEAN-China FTA AgEcon
Vanzetti, David; Setyoko, Nur Rakhman; Ngoc Que, Nguyen; Trewin, Ray.
Both Indonesia and Vietnam, as members of ASEAN, have negotiated a free trade agreement with China (ACFTA). ASEAN Member States can independently negotiate their tariff reductions. Both countries are generally aware of the opportunities access to the large Chinese market may present, but both are concerned to differing degrees about being flooded with Chinese imports, including agricultural products. As the time for implementation approaches, Indonesia has expressed a desire to renegotiate its tariff reduction schedules to protect sensitive sectors, including agriculture. By contrast, Vietnam, just over the border from China and with a history of informal trade, seems more accepting of the prospects. A global general equilibrium model, GTAP, is used to...
Tipo: Conference Paper or Presentation Palavras-chave: International Relations/Trade.
Ano: 2011 URL: http://purl.umn.edu/101002
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A comparison of multisensor integration methods for land cover classification in the Brazilian Amazon. Repositório Alice
LU, D.; LI, G.; MORAN, E.; DUTRA, L.; BATISTELLA, M..
Many data fusion methods are available, but it is poorly understood which fusion method is suitable for integrating Landsat Thematic Mapper (TM) and radar data for land cover classification. This research explores the integration of Landsat TM and radar images (i.e., ALOS PALSAR L-band and RADARSAT-2 C-band) for land cover classification in a moist tropical region of the Brazilian Amazon. Different data fusion methods?principal component analysis (PCA), wavelet-merging technique (Wavelet), high-pass filter resolution-merging (HPF), and normalized multiplication (NMM)?were explored. Land cover classification was conducted with maximum likelihood classification based on different scenarios. This research indicates that individual radar data yield much poorer...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Landsat Thematic Mapper; Wavelet multisensor.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/902113
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A comparison of paraffin and resin-based techniques used in bark anatomy Naturalis
Hamann, T.; Smets, E.; Lens, F..
Bark anatomy is an unappreciated discipline in plant systematics, despite its great potential to reveal systematically informative features. In this paper, main reasons for the lack of detailed bark anatomical data in many plant families are identified, including problems with sectioning, terminological issues, and difficulties in observation of dilated stems. We deal with these problems by focusing on two aspects: (1) compare, discuss and improve existing sectioning and maceration techniques using two species with soft and hard bark tissues; and (2) discuss the best way to collect stem bark samples. We hope that this paper will stimulate inclusion of bark anatomical data in future systematic studies.
Tipo: Article / Letter to the editor Palavras-chave: Bark anatomy; Light microscopy; Macerations; Plant systematics; Phloem; Sectioning; 42.54.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/421834
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A Comparison of Price Imputation Methods under Large Samples and Different Levels of Censoring. AgEcon
Lopez, Jose Antonio.
Research paper
Tipo: Conference Paper or Presentation Palavras-chave: Consumer/Household Economics; Demand and Price Analysis; Research Methods/ Statistical Methods; Imputation methods; Multiple imputation; Censored prices; Protein demand; Elasticities.
Ano: 2011 URL: http://purl.umn.edu/104498
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A comparison of soil and water properties in organic and conventional farming systems in England Organic Eprints
Hathaway-Jenkins, L. J.; Sakrabani, R; Pearce, Bruce; Whitmore, A. P; Godwin, R. J..
Organic farming and improvements to agricultural sustainability are often seen as synonymous. However, an extensive European review demonstrated that in practice this is not always true. This study aims to compare the status of soil and water properties between separate fields managed in either an organic or a conventional manner. Soil samples were collected from 16 pairs of farms, throughout England, with both arable and grass fields within each pair on similar soil type. Chemical (nutrients, pesticides, herbicides) and physical (aggregate stability, field capacity, shear strength, soil organic matter, infiltration rates) soil properties were measured in four main soil texture classes in organic and conventional fields. The physical soil properties varied...
Tipo: Journal paper Palavras-chave: Soil quality.
Ano: 2011 URL: http://orgprints.org/18705/1/Hathaway_Jenkins_2011_SUM_paper.pdf
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A comparison of the economic and environmental performances of conventional and organic farming: evidence from financial statements AgEcon
Argiles, Josep M.; Brown, Nestor Duch.
While conventional farming systems face serious problems of sustainability, organic agriculture is seen as a more environmentally friendly system since it favours renewable resources, recycles nutrients, uses the environment’s own systems for controlling pests and diseases, sustains ecosystems, protects soils, and reduces pollution. At the same time organic farming promotes animal welfare, the use of natural foodstuffs, product diversity and the avoidance of waste, among other practices. However, the future of organic agriculture will depend on its economic viability and on the determination shown by governments to protect these practices. This paper performs panel regressions with a sample of Catalan farms (Spain) to test the influence of organic farming...
Tipo: Article Palavras-chave: Organic farming; Conventional farming; Social/environmental/financial performance; Social and environmental accounting; Agribusiness; Environmental Economics and Policy; Farm Management; Q01; Q12; Q51; M41.
Ano: 2011 URL: http://purl.umn.edu/118577
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A Comparison of the Great Mississippi River Floods of 1993 and 2011: Implications for Crop Insurance and Reinsurance AgEcon
Vergara, Oscar.
The flooding situation in 2011 is similar in nature to the Great Mississippi Flood of 1993, but different in the particulars. First, the timing of the flood within the growing season is different. Second, the two floods occurred in different regions, with the 1993 flood affecting a portion of the Corn Belt and the 2011 flood affecting a region farther south. While floodwaters have inundated several million acres of cropland in 2011, yield losses from delayed planting are expected to be limited. Furthermore, the affected states from the current flood are primarily Group 2 states under the current SRA, which are provided with greater reinsurance protection by the government than the Group 1 states.
Tipo: Report Palavras-chave: Great Mississippi Flood; 1993; 2011; SRA; Crop Insurance Losses; AIR Model; Crop Production/Industries; Risk and Uncertainty; C; Q.
Ano: 2011 URL: http://purl.umn.edu/104897
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A comparison of two agar gel immunodiffusion methods and a complement fixation test for serologic diagnosis of Brucella ovis infection in experimentally infected rams Arq. Bras. Med. Vet. Zootec.
Xavier,M.N.; Sant'Anna,F.M.; Silva,T.M.A.; Costa,E.A.; Moustacas,V.S.; Merlo,F.A.; Carvalho Júnior,C.A.; Dasso,M.G.; Mathias,L.A.; Gouveia,A.M.G.; Lage,A.P.; Santos,R.L..
A infecção por Brucella ovis é considerada uma das principais causas de epididimite e infertilidade em carneiros, resultando em falhas reprodutivas e perdas econômicas significativas em rebanhos ovinos ao redor do mundo. O estudo teve o objetivo de avaliar três testes sorológicos disponíveis para o diagnóstico da brucelose ovina por B. ovis, utilizando 181 soros ovinos. Amostras de soro provenientes de carneiros experimentalmente infectados foram coletadas ao longo de 192 dias pós-infecção (n=117) e durante o período pré-infecção (n=9). Adicionalmente, amostras de soro foram obtidas de ovinos provenientes de um rebanho livre para B. ovis (n=55). As técnicas de imunodifusão em gel de agar (IDGA), utilizando dois antígenos disponíveis comercialmente, e de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ram; Brucella ovis; Serology; Complement fixation; Immunodiffusion.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000400031
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A Competing Risks Model of Land Use Change AgEcon
Towe, Charles A..
Tipo: Conference Paper or Presentation Palavras-chave: Dependent competing risks; Land conversion; Real options; Hazard models; Preservation easements; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/103725
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A Complex Variation of the Parietal and Visceral Branches of the Abdominal Aorta International Journal of Morphology
Unver Dogan,Nadire; Fazliogullari,Zeliha; Yilmaz,Mehmet Tugrul; Uysal,Ismihan Ilknur; Cicekcibasi,Aynur Emine; Ulusoy,Mahinur; Gunaslan,Pervin.
Variations in the branches of the abdominal aorta were determined during a routine abdominal region dissection of a 70-year-old male cadaver. Left gastric artery arose as the first root from antero-lateral of aorta. Coeliacomesenteric trunk occurred as a thick root. After 29.9mm, coeliacomesenteric trunk bifurcated as coeliac trunk and superior mesenteric artery. Coeliac trunk bifurcated as splenic artery and common hepatic artery. These multiple variations which change the normal anatomic structure of the abdominal aorta have to be kept in mind by surgeons, radiologists and anatomists.
Tipo: Journal article Palavras-chave: Abdominal aorta; Coeliacomesenteric trunk; Anatomical variation.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100015
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A composição florística e a diversidade de pteridófitas diferem entre a Floresta de Restinga e a Floresta Ombrófila Densa das Terras Baixas do Núcleo Picinguaba/PESM, Ubatuba/SP? Biota Neotropica
Nóbrega,Giseli Areias; Eisenlohr,Pedro Vasconcellos; Paciência,Mateus Luis Barradas; Prado,Jefferson; Aidar,Marcos Pereira Marinho.
As pteridófitas constituem um componente importante da flora tropical, representando aproximadamente 10% do total de plantas vasculares de florestas tropicais, sendo o grupo dominante entre a vegetação herbácea. O objetivo do trabalho foi verificar se as comunidades de pteridófitas de duas áreas de Mata Atlântica, Floresta de Restinga (FRS) e Floresta Ombrófila Densa de Terras Baixas (FTB), situadas sobre solos notavelmente distintos e separadas por uma grande rodovia, difeririam em sua composição florística e diversidade. Estas duas fisionomias estão localizadas no Núcleo Picinguaba do Parque Estadual da Serra do Mar, Ubatuba, São Paulo (23° 31' a 23° 34' S e 45° 02' a 45° 05' W). Em cada área delimitamos sete parcelas de 20 × 20 m, nas quais os...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Parâmetros edáficos; Seletividade ambiental; Análises multivariadas; Riqueza de espécies.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200015
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