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	Provedor de dados BABT (1) BJM (1) Autor Lemos,Judith Liliana Solórzano (2) Pereira Junior,Nei (2) Bon,Elba P.S. (1) Santana,Maria de Fátima Ebole (1) Palavra-chave Aspergillus awamori (2) Beta-xylosidase (1) Catabolic repression (1) Endoxylanases (1) Thermostability (1) Xylanases (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2002 (1) 2000 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 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 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: 2 Primeira ... 1 ... Última

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