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	Provedor de dados BJM (2) BABT (1) Autor Lemos,Judith Liliana Solórzano (2) Pereira Junior,Nei (2) Bon,Elba P.S. (1) Gomes,Eleni (1) Pavezzi,Fabiana Carina (1) Santana,Maria de Fátima Ebole (1) Silva,Roberto da (1) Mais... Palavra-chave Aspergillus awamori (3) Beta-xylosidase (1) Cassava starch (1) Catabolic repression (1) Corn starch (1) Endoxylanases (1) Glucoamylase (1) Potato starch (1) Saccharomyces cerevisiae (1) Thermostability (1) Xylanases (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2008 (1) 2002 (1) 2000 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Influence of some sugars on xylanase production by Aspergillus awamori in solid state fermentation BABT Lemos,Judith Liliana Solórzano; Pereira Junior,Nei. Aspergillus awamori showed high extracellular endoxylanase (100 U/ml) and beta-xylosidase activities (3.5 U/ml) when grown on milled sugar cane bagasse as the principal carbon source without treatment. Partial characterization of xylanases showed that the apparent values of Km were 3.12 ± 0.05 mg/ml for endoxylanase (in birchwood xylan) and 0.45 ± 0.05 mM for beta-xylosidase (in p -nitrophenyl beta-D-xylanopiranoside). Corresponding values of Vmax were 6.63 ± 0.02 and 0.078 ± 0.02 mumol/min. Gradual repression of endoxylanase activity was observed when increasing concentrations of glucose and xylose (1, 2, 4, 6 and 8 g of carbohydrate / 4 g of sugar cane bagasse) were added to production media. In contrast, beta-xylosidase activity was stimulated using low... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus awamori; Endoxylanases; Beta-xylosidase; Catabolic repression. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600005 Production and characterization of glucoamylase from fungus Aspergillus awamori expressed in yeast Saccharomyces cerevisiae using different carbon sources BJM Pavezzi,Fabiana Carina; Gomes,Eleni; Silva,Roberto da. Glucoamylase is widely used in the food industry to produce high glucose syrup, and also in fermentation processes for production beer and ethanol. In this work the productivity of the glucoamylase of Aspergillus awamori expressed by the yeast Saccharomyces cerevisiae, produced in submerged fermentation using different starches, was evaluated and characterized physico-chemically. The enzyme presented high specific activity, 13.8 U/mgprotein or 2.9 U/mgbiomass, after 48 h of fermentation using soluble starch as substrate. Glucoamylase presented optimum activity at temperature of 55ºC, and, in the substratum absence, the thermostability was for 1h at 50ºC. The optimum pH of activity was pH 3.5 - 4.0 and the pH stability between 5.0 and 7.0. The half life at... Tipo: Info:eu-repo/semantics/article Palavras-chave: Glucoamylase; Aspergillus awamori; Saccharomyces cerevisiae; Corn starch; Potato starch; Cassava starch. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100024 Thermal stability of xylanases produced by Aspergillus awamori BJM Lemos,Judith Liliana Solórzano; Bon,Elba P.S.; Santana,Maria de Fátima Ebole; Pereira Junior,Nei. The effect of temperature on the activity and stability of endoxylanase and beta-xylosidase from Aspergillus awamori was investigated. The growth of A. awamori in milled sugar cane bagasse produced predominantly extracellular endoxylanase (30 U/ml) and lower amounts of beta-xylosidase (1.3 U/ml). Grown in sugar cane bagasse as the principal carbon source, the microorganism produced a quite stable beta-xylosidase in a temperature range of 35-55°C, but it exhibited a lower thermostable endoxylanase. The thermostability of endoxylanase was enhanced through addition of polyhydric alcohols, mainly 2 M xylitol and sorbitol solutions. Particular stability upon storage (100%) was found for endoxylanase at -4°C for 165 days. Yet for beta-xylosidase, an activity... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus awamori; Thermostability; Xylanases. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300010 Registros recuperados: 3 Primeira ... 1 ... Última

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