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| Registros recuperados: 223 | |
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| Fafchamps, Marcel; Gabre-Madhin, Eleni Z.. |
| Based on original trader surveys, this paper examines how agricultural traders operate in Benin and Malawi. Results indicate that the largest transaction costs are search and transport. The use of modern technology is limited. Search methods rely principally on personal visits by the trader, and quality control requires the presence of the trader at the time of purchase. This increases costs, as the trader has to travel a lot, and makes it difficult for trading enterprises to grow. Since enterprises remain very small, personal transport and search time represent a non-negligible share of marketing costs. |
| Tipo: Journal Article |
Palavras-chave: Traders; Transaction costs; Transport; Storage; Search; Marketing. |
| Ano: 2006 |
URL: http://purl.umn.edu/57022 |
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| Silva, Gutierres Nelson; Grossi, José Antônio Saraiva; Carvalho, Marcela Silva; Kuki, Kacilda Naomi; Goulart, Samuel de Melo; Pimentel, Leonardo Duarte. |
| Macauba fruits are oil-rich drupes with high moisture content at harvest. This feature can affect the chemical properties of the oil and increase the costs of biodiesel production. Therefore, it is necessary to adopt postharvest strategies to ensure oil quality. The aim of this work was to evaluate the effect of drying macauba fruit on the quality of the pulp oil. Husked and dehusked fruits were dried at 60°C and then stored. At 0, 15, 45, 100, and 180 days after storage, fruit samples were retrieved, and the oil from the pulp was evaluated for physicochemical parameters. The removal of the husk from the fruits considerably reduced the drying time compared to that of the husked fruits. Drying prevented deterioration of the fruit even after 180 days of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata; Post-harvest; Storage; Bioenergy; Armazenamento de Produtos Agrícolas. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/43451 |
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| Corte,Viviana Borges; Borges,Eduardo Euclydes de Lima e; Gonçalves,José Francisco de Carvalho; Silva,Mirian Sousa. |
| The decay of seeds is irreversible and at best can only be delayed by applying techniques that reduce the velocity of the metabolic reactions involved. There is little information on the biochemistry of tropical forest tree seeds related to their storability. It was investigated the influence of the composition of lipids and soluble sugars of two storage compartments, the cotyledons and the embryonic axis, of Melanoxylon brauna Schot. (Leguminosae- Caesalpinioideae), a hardwood known as black brauna, seeds stored at 20 ºC for 0, 3, 6, 9 and 12 months (natural ageing) and for 0, 24, 48, 72 and 96 hours at 40 ºC (accelerated ageing). The levels of fatty acids and monosaccharides varied differentially in each of the embryo storage compartments. Changes in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbohydrates; Forest; Lipids; Native species; Storage. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222010000300017 |
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| MELO, R. F. de; OLIVEIRA, A. R. de; DEON, D. S.; ANJOS, J. B. dos; BIANCHINI, P. C.; FERNANDES JUNIOR, P. I.; CUNHA, T. J. F.; SILVA, M. S. L. da. |
| A barragem subterrânea se destaca dentre as tecnologias de armazenamento de água de chuva na região Semiárida brasileira, sendo difundida nas comunidades rurais pelo Programa P1+2. Nessa Região, as irregularidades pluviométricas comprometem a sustentabilidade agrícola, sendo este cenário agravado com as mudanças climáticas. Pesquisas nessas condições podem resultar em recomendações de manejo sustentáveis para as diferentes disponibilidades hídricas. Além disso, o uso de práticas agroecológicas integradas à tecnologias de captação e armazenamento de água de chuva contribuem para aumentar a resiliência dos sistemas frente às mudanças climáticas (Figura 1). Este Projeto teve como objetivo reduzir os riscos de sistemas agrícolas familiares do Semiárido por... |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Água de chuva; Chuva; Captação D´água; Armazenamento; Irrigação; Barragem Subterrânea; Agricultura Sustentável; Rain; Storage; Water harvesting; Sustainable agriculture; Dams (hydrology). |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1137195 |
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| FIORAVANTE,JÚLIA BORIN; SOUZA,VANESSA RODRIGUES DUARTE DE; RODRIGUES,ROSANE DA SILVA; DIAZ,PATRÍCIA DE OLIVEIRA; MOREIRA,ANGELITA DA SILVEIRA. |
| ABSTRACT In this study, to increase the preservation of phenolic bioactive compounds and antioxidant activity in blueberry pulp, heat treatment associated with addition of xanthan gum was used. A commercial mixture of blueberries (Powerblue, Climax and Bluegen cultivars) was added with 0.08% (w/w) citric acid and subjected to heat treatment by direct heating until 90 °C in conventional open pan (OP) and by direct application of steam (AS); both with and without the addition of xanthan pruni (OPX and ASX), followed by pulping. Samples of only frozed fruits were considered as control. The five treatments remained under freezing and were evaluated until 90 days of storage for antioxidant activity, phenols, flavonoids and total monomeric anthocyanins. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blueberry; Vaccinium ashei; Fruit pulp; Heat; Fruit technology; Storage. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000300902 |
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| Tu,Zhiming; He,Guangyuan; Li,Kexiu X.; Chen,Mingjie J.; Chang,Junli; Chen,Ling; Yao,Qing; Liu,Dongping P.; Ye,Huan; Shi,Jiantao; Wu,Xuqian . |
| This paper describes an efficient bacterial transformation system that was established for the preparation of competent cells, plasmid preparation, and for the storage in bacterial stocks in our laboratory. Using this method, a number of different plasmids have been amplified for further experiments. Competent cells for bacterial transformation were prepared by the calcium chloride method with an optimum concentration of 75 mM. Three different strains of Escherichia coli that were tested are DH5α, TG1 and XL1 blue, and the most efficient strain being XL1 blue. The optimal optical density (OD600) range for competent cell preparation varied for each of the strains investigated, and for XL1 blue it was 0.15-0.45; for TG1 it was 0.2-0.5; and for... |
| Tipo: Journal article |
Palavras-chave: Competent cells; E. coli; Plasmid; Storage; Transformation. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000100014 |
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| Machado,Francisca Ligia de Castro; Alves,Ricardo Elesbão; Figueiredo,Raimundo Wilane. |
| The objective of this work was to determine the effects of postharvest application of 1-methylcyclopropene (1-MCP) and two calcium salts, applied individually or combined, on firmness and visual quality of fresh-cut muskmelon stored in air, for 18 days. Two sets of fruits, one of them exposed to 1-MCP at 300 nL L-1, were cut into cubes, dipped in deionized water, or in 1% Ca solutions as CaCl2, or in calcium amino acid chelate (Ca-chelate), placed in clamshell containers, and stored in air at 5±1ºC and 90±5% RH, for 18 days. The assay was conducted using an entirely randomized design, with three replications, in a split plot array. Evaluation of visual appearance, color, flesh firmness, total soluble solids, titratable acidity, and pH was performed right... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Shelf life; Firmness; Quality; Storage. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000500003 |
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| Li,Yi; Li,Zhiqiang; Wang,Liangju. |
| ABSTRACT: The compound 5-aminolevulinic acid (ALA) is a key precursor in the biosynthesis of porphyrins, such as chlorophyll, heme and phytochromobilin, and has multiple physiological effects on plants. Varying concentrations of ALA (50mg L-1, 100mg L-1, and 150mg L-1) and water (control) were applied to white stage 'Sweet Charlie' strawberry fruit. All ALA treatments delayed senescence and improved the qualities of strawberries fruit during storage. Among the treatments, 150mg L-1 ALA was the most effective dosage concentration. Exogenously applied ALA significantly reduced the decay index, respiration rate, O2 - production rate (O2 -), H2O2 and malondialdehyde (MDA) content, increased superoxide dismutase (SOD), ascorbate peroxidase activities (APX),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant enzyme; Fragaria × ananassa; Storage; Preharvest; Quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202103 |
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| Matthews,S.. |
| In comparisons of six seed lots of different F1 hybrid cultivars of cauliflower with similarly high laboratory germinations (above 90%) separation in germination was achieved after controlled deterioration (C.D.) at 24% moisture content (m.c.) and 45 0C for 24 hours. This measure of vigour was related to the position of the lots on the seed survival curve and was highly predictive of the longevity of the lots when stored at 15% m.c. and 20 0C for 12 and 16 weeks. When each seed lot was deteriorated at 24% m.c. for increasing times (from 0 to 36 hours) a reduction in the subsequent percentage germination was seen, which, using probit transformed percentages, was significantly and linearly related to the leakage of electrolytes into seed soak water over 24... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cauliflower; Controlled deterioration; Leakage; Electrical conductivity; Storage. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000500011 |
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| Sousa,Adalberto H.; Faroni,Lêda R. A.; Andrade,Gilberto S.; Freitas,Romenique S.; Pimentel,Marco A. G.. |
| The objective of this study was to evaluate the insecticidal activity of diatomaceous earth (DE) at different ambient temperatures on adult Sitophilus zeamais and progeny, using different doses and exposure periods. The experiments were performed in Petri dishes containing 40 g of the whole corn kernel, treated with DE at doses of 0, 0.25, 0.5 and 1.0 kg Mg-1. Each dish was infested with 25 S. zeamais adults and kept at climatic chambers under temperatures of 20, 25, 30, 35 and 40 ºC. The insect mortality was recorded after six and 15 days from the beginning of the bioassays. The grains evaluated at 15 days were separated from insects and kept in the dishes for another 75 days under the same temperature conditions. After this period the effect of ambient... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn weevil; Inert dusts; Storage; Insect control. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000900011 |
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| Registros recuperados: 223 | |
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