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	Provedor de dados Anais da ABC (AABC) (1) BABT (1) Autor Jesus,Paulo C. (1) Joekes,Inés (1) Monte Alegre,Ranulfo (1) Rigo,Maurício (1) Silva,Jane E. S. (1) Palavra-chave Chrysotile (2) Alcoholic batch fermentations (1) Alcoholic continuous fermentations (1) Esters (1) Ethanol (1) Immobilized yeast (1) Lipases (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2003 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Evaluation of the catalytic activity of lipases immobilized on chrysotile for esterification Anais da ABC (AABC) Silva,Jane E. S.; Jesus,Paulo C.. In the present work, the ester synthesis in organic media catalyzed by lipases immobilized on chrysotile was studied. Lipases of different sources (Mucor javanicus, Pseudomonas cepacia, Rhizopus oryzae, Aspergillus niger and Candida rugosa) were immobilized on chrysotile, an inexpensive magnesium silicate, and used for esterification of hexanoic, octanoic and lauric acid with methanol, ethanol, 1-butanol and 1-octanol at 25ºC in hexane as solvent. The best results were obtained with Mucor javanicus lipase and lauric acid giving yields of 62-97% of ester. Tipo: Info:eu-repo/semantics/article Palavras-chave: Chrysotile; Lipases; Esters. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000200003 Ethanol fermentation of a diluted molasses medium by Saccharomyces cerevisiae immobilized on chrysotile BABT Monte Alegre,Ranulfo; Rigo,Maurício; Joekes,Inés. In this work, the catalytic role of chrysotile support on the acceleration of alcoholic fermentation under non-aseptic conditions by Saccharomyces cerevisiae was investigated. The fermentation medium employed consisted only of diluted sugar-cane molasses. In the batch fermentations process with immobilized yeasts, the initial rate of CO2 production increased roughly 27 % during the first 30 minutes, compared to systems containing no chrysotile. A study of continuous alcoholic fermentation with chrysotile in the reactor bed showed a higher ethanol production rate at the different dilution rates investigated compared to similar fermentations without chrysotile. Tipo: Info:eu-repo/semantics/article Palavras-chave: Alcoholic continuous fermentations; Alcoholic batch fermentations; Immobilized yeast; Chrysotile; Ethanol. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400031 Registros recuperados: 2 Primeira ... 1 ... Última

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