Oilseeds
Mostrando 13-24 de 41 artigos, teses e dissertações.
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13. Estudo da Estabilidade Oxidativa de Amostras de Biodiesel Obtidas a partir de Diferentes Fontes de Oleaginosas / Study of the Oxidative Stability of Biodiesel Samples Obtained from Different Sources of Oilseeds
Biodiesel à definido como sendo uma mistura de Ãsteres alquÃlicos obtido a partir de uma reaÃÃo de transesterificaÃÃo de um triglicerÃdeo (Ãleo vegetal ou gordura animal) com um Ãlcool de cadeia curta, normalmente metanol ou etanol na presenÃa de catalisadores bÃsicos. Entretanto, biodieseis derivados de matÃrias-primas que possuam Ãcidos graxo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/01/2010
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14. Higroscopic properties of castor seeds (Ricinus Comunis L.)
Sorption isotherms of castor seeds were evaluated at 30, 40, 50 and 60ºC using the static gravimetric method. Sigmoid trends were observed for isotherms obtained showing a clear effect of temperature. Experimental values were adjusted using the modified isotherms of Henderson, Halsey, Oswin and Guggenheim-Anderson-de Boer (GAB). Models were compared using f
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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15. Analysis of spectral influence of the NMR CWFP parameters in flow quantitative measurements / Análise da influência dos parâmetros espectrais da RMN-CWFP em medidas quantitativas em fluxo
A seqüência de pulsos RMN-CWFP (Ressonância Magnética Nuclear - Precessão Livre de Onda Contínua) tem encontrado diversas aplicações na ciência. O presente trabalho analisa a grande sensibilidade dessa seqüência em relação a variações de seus parâmetros espectrais, exclusivamente em uma caracterização teórico-experimental da RMN-CWFP em fl
Publicado em: 2009
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16. Avaliação do carvão ativado da torta prensada de Raphanus sativus como adsorvente para a remoção de corantes básicos presentes em soluções aquosas diluídas
The performance of the cold-pressed cake from Raphanus sativus (L. Var.) oilseeds activated carbon, a solid residue from biodiesel production, was evaluated as an adsorbent for basic dyes. The main objective is to use the adsorbent in the treatment of effluents generated by textile industries. Methylene blue (MB) dissolved in dilute aqueous solutions was cho
Publicado em: 2009
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17. Usage competition between oilseeds and biofuels : impact assessment on the brazilian food production
Publicado em: 2007
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18. Avaliação do impacto do programa de biocombustíveis na disponibilidade hídrica do cerrado
This study sought to evaluate the impact of the biofuels programme in the availability of closing water of the cerrado. Currently, the water resources of the cerrado, in the dry season, already suffering from an imbalance because the evapotranspiration in the region do not precipitate in the same place, as the movement atmospheric studies presented by Nation
Publicado em: 2007
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19. Mechanical expelling of peanut and sunflower oils to biodiesel production by basic catalyst / Extração mecanica de oleos de amendoim e de girassol para produção de biodiesel via catalise basica
Biodiesel is a fuel produced from triglycerides found in nature, like vegetable oils and animal fats. It has occupied an important position in Brazil, especially after the creation of a law that authorizes its mixture in diesel. All the focus gave to this new fuel demands a complete study of all productive chain, that comprehend from agriculture sector, by r
Publicado em: 2007
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20. SimulaÃÃo do escoamento da produÃÃo de milho, soja e trigo dos nÃcleos regionais de Cascavel e Toledo / A computational model for simulating the transport of corn, soybean and wheat yield from west parana state region.
Os NÃcleos Regionais de Cascavel e Toledo da Secretaria de Estado da Agricultura e Abastecimento â SEAB â do Paranà estÃo localizados na regiÃo Oeste. O primeiro nÃcleo abrange uma Ãrea agrÃcola de 1.283.062,58 ha e compreende 28 munÃcipios, enquanto o segundo tem Ãrea agrÃcola de 849.732,80 ha e conta com 20 municÃpios. Esses dois nÃcleos regi
Publicado em: 2006
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21. Identification of shortfalls and establishment of a workplan for the success of the Brazilian Biodiesel Program. / Identificação dos gargalos e estabelecimento de um plano de ação para o sucesso do Programa Brasileiro do Biodiesel.
The increasing demand for the development of automotive technologies of less polluting fuel emissions, including that of alternative fuels, has been the way to foster Biodiesel technology, of non-fossil origin, derived from renewable sources, aiming at gradually substituting the use of diesel oil, in the worldwide energetic matrix. The american directive C
Publicado em: 2005
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22. Estudo exploratorio da aplicabilidade dos meios supercriticos para a extração e o processamento de oleos vegetais com enfase em controle aplicado a unidade extratora
Since it was proposed in 20 s, the solvent extraction process for oilseeds has employed petrol-derived solvents. Even thought these extraction agents have been significantly improved in quality, the hexane (nowadays used) still presents detrimental features such as toxicity, non-renewability as well as high flammability. Supercritical solvents, most often th
Publicado em: 1998
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23. Malate Synthase Activity in Cotton and Other Ungerminated Oilseeds: A Survey 1
Extracts from several species and varieties of ungerminated cotton seeds plus homogenates from 18 other oilseeds (representing 11 different families) were examined for malate synthase and isocitrate lyase activity. Malate synthase activities in the various cotton seeds ranged from 35 to 129% of the units per dry seed weight found in Deltapine 16 cotton. For
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24. Occurrence of aflatoxins in oilseeds providing cocoa-butter substitutes.
Four oilseeds providing cocoa-butter substitutes--shea, pentadecima, illipe, and salseed--when tested as substrates for aflatoxin production by two strains of Aspergillus parasiticus, gave varying levels of aflatoxin. Aflatoxins were found at low levels occurring naturally in moldy shea-nuts, but none of 21 commercial shea-nut samples contained greater than