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Registros recuperados: 63
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A concentração geográfica da produção de ovinos: comparativo dos resultados dos Censos 1995/96 e 2006 AgEcon
Lima, Roberto Arruda de Souza.
Os resultados preliminares do Censo Agropecuário mostraram que o rebanho ovino no Brasil é menor do que apontavam estudos anteriores. Para compreender esse resultado é necessário, entre outros estudos, verificar a evolução do efetivo no período. O objetivo do presente trabalho foi mensurar a concentração do rebanho ovino no Brasil, nos anos de 1995/96 e 2006. Para tanto, utilizou-se a metodologia do índice T de Theil e da análise tabular dos dados. Os resultados demonstraram redução da concentração do rebanho entre as Unidades da Federação. Apesar de se verificar concentração do rebanho pela análise tabular, esta não foi fortemente caracterizada pelo índice T de Theil, que mensurou a distribuição do rebanho em relação à área das Unidades da Federação....
Tipo: Conference Paper or Presentation Palavras-chave: Ovinocultura; Concentração; Índice T de Theil; Sheep; Concentration; Theil index; Livestock Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/113999
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A hemicelulose das sementes de Hymenaea parvifolia Huber e seu emprego na cremagem do latex de seringueira. Repositório Alice
MORS, W. B..
1946
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Latex; Seringueira; Tecnologia; Cremagem; Semente; Hemicelulose; Hymenaea parvifolia; Concentração; Amazônia; Brasil; Rubber tree; Technology; Seed; Concentration; Cremation.
Ano: 1946 URL: http://www.alice.cnptia.embrapa.br/handle/doc/379772
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A magyar zöldség-gyümölcs kisárutermelők nagy láncoknak történő értékesítési lehetőségei AgEcon
Seres, Antal; Szabo, Marton.
A multinacionális láncoknál a közvetlen kisárutermelői beszállítóknak a speciális „réspiaci” termékeknél, illetve a nagy termelők között szabadon hagyott piaci réseken van mozgáslehetőségük. E termékek kivételével a közvetlen kisárutermelői beszállításoknak nincs jövője, mert elaprózott kínálattal nagy számban nem léphetnek be a beszállítói körbe. Hatékonysági követelmények miatt előbb-utóbb a hazai láncoknál is erősödik a beszerzés koncentrációja, és ez itt is csökkenti a közvetlenül beszállító kisárutermelők ma még lényegesen nagyobb lehetőségeit. A nagy üzletláncok üzletpolitikája olyan követelményeket támaszt, amelyeket a kisárutermelők a réspiaci termékek kivételével külön-külön nem tudnak teljesíteni. Ezért közös termeltető és értékesítő...
Tipo: Journal Article Palavras-chave: Koncentráció; Nagy kereskedelmi láncok; Beszállítás; Kisárutermelők; Zöldség-gyümölcs; Concentration; Large retail chains; Supply; Small farmers; Fruit and vegetables; Farm Management; International Relations/Trade.
Ano: 2009 URL: http://purl.umn.edu/92484
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A prática da concentração do latex. Infoteca-e
WISNIEWSKI, A.; ROHNELT, R. C..
1947
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Latex; Concentração; Preservação; Cremagem; Análise; Química; Tecnologia; Concentration; Preservation; Cremation; Analysis; Chemistry; Technology.
Ano: 1947 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/387999
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A RATIONALE FOR CAPTIVE SUPPLIES AgEcon
Love, H. Alan; Burton, Diana M..
Tipo: Conference Paper or Presentation Palavras-chave: Captive supplies; Concentration; Meat industry; Poultry industry; Agribusiness.
Ano: 1997 URL: http://purl.umn.edu/25948
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Allelopathic effects of Rhynchosia capitata on germination and seedling growth of mungbean Planta Daninha
Ali,H.H.; Tanveer,A.; Nadeem,M.A.; Javaid,M.M.; Kashif,M.S.; Chadhar,A.R..
Experiments were conducted to evaluate the allelopathic influence of Rhynchosia capitata on germination and seedling growth of mungbean (Vigna radiate) along with identification of the phytotoxic substances responsible for this activity. Water extracts of root, shoot, leaf, fruit and whole plant were prepared by soaking them in water in a ratio of 1:20 (w/v) for 24 h. All the extracts affected germination and seedling growth of mungbean, but higher inhibition was seen with R. capitata leaf water extracts. A linear decrease in the germination characteristics of mungbean was observed with the decrease in the concentration of leaf extract from 5% to 1%. The soil-incorporated residues (1-4% w/w) of R. capitata stimulated the growth of root and hypocotyl at low...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phytotoxic; Phenolic; Allelopathy; Residues; Concentration; Water extracts.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300002
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An Overview of the Canadian Agriculture and Agri-Food System AgEcon
This 2008 report provides an economic overview of the Canadian agriculture and agri-food system. It is meant to be a multi-purpose reference document to provide: an introduction to the agriculture and agri-food system; a snapshot of structural changes that are occurring throughout the system in response to various factors; and background data and information to inform public discussions on challenges and opportunities facing the Canadian agriculture and agri-food system. The 2008 report begins with a special feature describing recent developments in global commodity markets when prices rose dramatically over the past year. It continues by reviewing each segment of the system, going upstream from consumers to food distribution, food, beverage and...
Tipo: Report Palavras-chave: Agriculture; Agri-food; Gross Domestic Product; GDP; Employment; Exports; Imports; Innovation; Inflation; Farm typology; Farm income; Government support; Program payments; Profitability; Processing; Concentration; Water; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Labor and Human Capital; Land Economics/Use; Livestock Production/Industries; Marketing; Production Economics; Productivity Analysis; Public Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/46805
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An Overview of the Canadian Agriculture and Agri-Food System 2009 AgEcon
This 2009 report provides an economic overview of the Canadian agriculture and agri-food system. It is meant to be a multi-purpose reference document to provide: an introduction to the agriculture and agri-food system; a snapshot of structural changes that are occurring throughout the system in response to various factors; and background data and information to inform public discussions on challenges and opportunities facing the Canadian agriculture and agri-food system. Charts and tables with brief accompanying texts are used to summarize information and to provide base performance indicators. The 2009 report begins with a special feature which describes indicators to benchmark competitiveness of the Canadian agriculture and agri-food sector at the...
Tipo: Report Palavras-chave: Agri-food; Competitiveness; Consumers; GDP; Employment; Exports; Imports; Innovation; Inflation; Farm typology; Income; Government support; Program payments; Profitability; Processing; Concentration; Water; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Labor and Human Capital; Land Economics/Use; Livestock Production/Industries; Marketing; Production Economics; Productivity Analysis; Public Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/59885
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Analytical Methods for Virus Detection in Water and Food ArchiMer
Bosch, Albert; Sanchez, Gloria; Abbaszadegan, Morteza; Carducci, Annalaura; Guix, Susana; Le Guyader, Soizick; Netshikweta, Rembuluwani; Pinto, Rosa M.; Van Der Poel, Wim H. M.; Rutjes, Saskia; Sano, Daisuke; Taylor, Maureen B.; Van Zyl, Walda B.; Rodriguez-lazaro, David; Kovac, Katarina; Sellwood, Jane.
Potential ways to address the issues that relate to the techniques for analyzing food and environmental samples for the presence of enteric viruses are discussed. It is not the authors' remit to produce or recommend standard or reference methods but to address specific issues in the analytical procedures. Foods of primary importance are bivalve molluscs, particularly, oysters, clams, and mussels; salad crops such as lettuce, green onions and other greens; and soft fruits such as raspberries and strawberries. All types of water, not only drinking water but also recreational water (fresh, marine, and swimming pool), river water (irrigation water), raw and treated sewage are potential vehicles for virus transmission. Well over 100 different enteric viruses...
Tipo: Text Palavras-chave: Enteric viruses; Gastroenteritis; Hepatitis; Detection; Concentration.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00031/14191/11465.pdf
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Assessing Competition in the U.S. Beef Packing Industry AgEcon
Ward, Clement E..
Tipo: Journal Article Palavras-chave: Beef; Cattle; Competition; Concentration; Market structure; Meatpacking; Pricing; Agribusiness; Livestock Production/Industries; L13; Q13.
Ano: 2010 URL: http://purl.umn.edu/94758
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ASYMMETRIC PRICE RELATIONSHIPS IN THE U.S. BROILER INDUSTRY AgEcon
Bernard, John C.; Willett, Lois Schertz.
This study presents a testing methodology to analyze potential price asymmetries among the farm, wholesale, and retail levels of the U.S. broiler industry. Lag length, direction of causality and power of the integrators in the industry have allowed the wholesale price to become the center, causal price in the market. Asymmetric price transmissions, however, are limited. While downward movements in the wholesale price are passed on more fully to growers than increases in the wholesale price, only consumers in the North Central region of the U.S. share a larger portion of wholesalers' price increases than price decreases.
Tipo: Journal Article Palavras-chave: Asymmetry; Broilers; Concentration; Granger causality; Price transmission; Demand and Price Analysis; Livestock Production/Industries.
Ano: 1996 URL: http://purl.umn.edu/15125
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Az élelmiszerlánc szereplői közötti kapcsolatok hazánkban AgEcon
Popp, Jozsef; Juhasz, Aniko.
Hazánkban a válság miatt a keresleti oldalról növekedni képtelen piacon a kiskereskedelmi szereplők a kötelező éves növekedést immár csak a piac újraosztásával érhetik el, ami a kiskereskedők között kíméletlen – horizontális – versenyt eredményez. Ennek eszköze az alapvető termékek esetében a minél alacsonyabban tartott ár. Ezért a kereskedelmi láncok és beszállítóik kapcsolata vegyes képet mutat. A nagy, tőkeerős, elsősorban nemzetközi élelmiszer-feldolgozók és mezőgazdasági beszállítók számára még így is jövedelmező lehet a kereskedelmi láncok által biztosított széles körű piaci jelenlét. Ezzel szemben a hazai szinten nagy, de nem elég tőkeerős hazai beszállítók alkupozíciója rendkívül kényes, számukra még veszteség mellett is létkérdés a kereskedelmi...
Tipo: Article Palavras-chave: Élelmiszerlánc; Beszállítók; Vevői erő; Koncentráció; Verseny; Food supply chain; Food suppliers; Buyer power; Concentration; Competition; Agribusiness; International Relations/Trade; Marketing.
Ano: 2011 URL: http://purl.umn.edu/119886
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Business concentration in the Hungarian food retail market AgEcon
Juhasz, Aniko; Seres, Antal; Stauder, Marta.
Retail market consolidation and its effects on micro enterprises and corner shops present a long-term challenge to the Hungarian retail grocery market. The authors hope this study will help the concerned parties deal with this challenge. The study is one of the first attempts at a comprehensive analysis, and employs concentration tables and concentration ratios. It is based on a database from all businesses, including partnerships and individual entrepreneurs, and focuses on the quantifiable trends and the magnitude of market concentration regarding retail sales and specific areas affected by the consolidation process. Our research revealed that, by 2004, concentration in the retail food market was at a high level, considerably higher than the overall...
Tipo: Journal Article Palavras-chave: Grocery retail; Concentration; Micro enterprises; Small grocery (corner) shops; Hungary; Agribusiness.
Ano: 2008 URL: http://purl.umn.edu/46443
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Commodity Payments, Farm Business Survival, and Farm Size Growth AgEcon
Key, Nigel D.; Roberts, Michael J..
In the last 25 years, U.S. crop farms have steadily declined in number and grown in average size, as production has shifted to larger operations. Larger farms tend to receive more commodity program payments because most payments are tied to a farm’s current or historical production, but whether payments have contributed to farm growth is uncertain. This study uses farm-level data from the census of agriculture to determine whether there is a statistical relationship between farm commodity program payments and greater concentration in production. The analysis indicates that, at the regional level, higher commodity program payments per acre are associated with subsequent farm growth. Also, higher payments per acre are associated with higher rates of farm...
Tipo: Report Palavras-chave: Agricultural payments; Farm size; Farm survival; Concentration; Consolidation; Government payments; Commodity programs.; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Farm Management.
Ano: 2007 URL: http://purl.umn.edu/55968
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Comportamento da clorofila em procedências de grevílea (Grevillea robusta Cunn.) no Noroeste do Paraná. Infoteca-e
MARTINS, E. G.; RIBASKI, J.; NEVES, E. J. M..
Avaliou-se, de três a quatro anos de idade, as concentrações de clorofila a, clorofila b clorofila total e, a relação clorofila a/b de quatro diferentes procedências de grevílea (Grevillea robusta Cunn.), nos períodos de verão e inverno, plantadas na Região de Nova Esperança. Os resultados possibilitaram as seguintes conclusões: 1) em média, a grevílea na região de Nova Esperança, apresentou concentrações 30,42% mais elevadas de clorofila a em relação a clorofila b, no verão e concentrações 24,07% mais elevadas de clorofila a em relação a clorofila b, no inverno. 2) em média, a grevílea na região de Nova Esperança, apresentou concentração de 27,34% mais elevada de clorofila total, no verão, quando comparada com o inverno. 3) As procedências australianas...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Grevillea robusta; Clorofila; Concentração; Paraná; Chlorophyll; Concentration; Espécie exótica; Grevilha; Produção.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/306542
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Concentração do crédito rural no Estado da Bahia no período de 1999 a 2003 AgEcon
Almeida, Paulo Nazareno Alves; Lima, Roberto Arruda de Souza; Santos, Vinicius Correia; Almeida, Andreia Ferraz Chaves; Shirota, Ricardo.
O crédito rural é uma das principais políticas de fomento à agricultura, porém os recursos têm sido distribuídos de forma desigual, privilegiando o Sul e o Sudeste brasileiros. O objetivo do presente trabalho foi mensurar a concentração do crédito agrícola na Bahia, dividido em suas mesorregiões, no período de 1999 a 2003. Para tanto, utilizou-se a metodologia do índice T de Theil e da análise tabular dos dados. Os resultados demonstraram concentração do crédito entre as mesorregiões baianas. Apesar de se verificar concentração do crédito pela análise tabular, esta não foi fortemente caracterizada pelo índice T de Theil, que mensurou a distribuição do crédito em relação ao valor da produção. A despeito da elevação do índice no período analisado,...
Tipo: Conference Paper or Presentation Palavras-chave: Crédito rural; Concentração; Distribuição; Índice T de Theil; Bahia; Rural credit; Concentration; Distribution; Theil index; Agricultural Finance.
Ano: 2008 URL: http://purl.umn.edu/108188
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Concentracao total de uranio e torio em alguns solos brasileiros. Repositório Alice
PEREZ, D. V.; SALDANHA, M. F. da C.; MOREIRA, J. C.; VAITSMAN, D. S..
As amostras dos horizontes diagnosticos superficiais (A) e subsuperficiais (B) de 15 perfis de solos brasileiros foram analisadas com respeito aos teores de U e Th, extraidos apos digestao com Agua regia, pela tecnica de ICP-MS. Os teores de U e Th, determinados no horizonte A, variaram, respectivamente, de 0,001 a 2,115 mg/kg e de 0,003 a 38,080 mg/kg e no horizonte B, respectivamente, de 0,003 a 2,298 mg/kg e de 0,071 a 42,090 mg/kg. Foram verificadas correlacoes significativas e positivas entre os dois elementos analisados com os teores de ferro e de argila nas 30 amostras analisadas.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Solo; Uranio; Torio; Concentracao; Concentration; Uranium; Soils; Thorium.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/87868
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Concentration and purification of Porphyridium cruentum exopolysaccharides by membrane filtration at various cross-flow velocities ArchiMer
Balti, Rafik; Le Balc'H, Romain; Brodu, Nicolas; Gilbert, Marthe; Le Gouic, Benjamin; Le Gall, Sophie; Sinquin, Corinne; Masse, Anthony.
Exopolysaccharides (EPS) from cell-free Porphyridium cruentum media were concentrated then purified (diafiltration) on a 0.14 µm ceramic membrane. The influence of cross-flow velocities on filtration performances was investigated. Mean permeate fluxes equal to 49.8, 68.9 and 81.9 L.h-1. m-2 were obtained during the concentration at 4 bar for respectively cross-flow velocities inside the membrane lumen equal to 2.5, 3.3 and 4.2 m.s-1; 49.7 L.h-1. m-2 for the diafiltration at 3.3 m.s-1. Permeate fluxes were correctly predicted from polysaccharide concentrations (10 % deviation). Volume reduction factors higher than 7.8 were reached. Rejection rates of polysaccharides and proteins varied according to the cross-flow velocities. Thus, the EPS recovery rate or...
Tipo: Text Palavras-chave: Membrane filtration; Exopolysaccharides; Microalga; Concentration; Diafiltration.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00445/55694/57360.pdf
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Concentration in Hungarian Food Retailing and Supplier-Retailer Relationships AgEcon
Juhasz, Aniko; Stauder, Marta.
The paper is a summary about the Hungarian retail sector based on the results of different research projects completed in the last five years. From all of these studies and of course the wide ranging domestic and international literature we had to conclude that the retailers have become more and more the exclusive owner of the information about the consumers and with this they become the new "captains" of the food chain. Thus we always started our research with gathering information about the situation of the Hungarian retail sector because we believed if we want to help those who try to adapt (the suppliers) then we have to know much more about those who dictate (the retailers). Analysing the concentration in company and not branch level we can say that...
Tipo: Conference Paper or Presentation Palavras-chave: Food retailing; Concentration; Market structure; Supplier-retailer relationships; Industrial Organization; D3; L81.
Ano: 2006 URL: http://purl.umn.edu/25766
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Concentration of the trade and the small-scale fruit and vegetable producers – practices in Hungary and in the European Union AgEcon
Kurti, Andrea; Kozak, Anita; Seres, Antal.
This study examines the conflicts arising from the requirements of the food retail chains and their possible solutions, based on an analysis of the foreign and domestic trade literature and on a domestic assessment of 2008. Direct supplies from small-scale producers have future prospects only in the field of niche market products. Only production organisations integrating small-scale producers may be successful in the supply of large quantity products of homogeneous quality. In Hungary, similar organisations – principally POs – still do not have a role comparable to that they fulfil in more developed countries of the European Union in the field of the supplies to the food retail chains. For increasing supplies, the domestic small-scale producers should...
Tipo: Journal Article Palavras-chave: Concentration; Food retail chains; Supply; Small-scale producers; Fruits and vegetables; International Relations/Trade.
Ano: 2010 URL: http://purl.umn.edu/59047
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