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	Provedor de dados BABT (2) Autor Malvessi,Eloane (2) Silveira,Mauricio Moura da (2) Hendges,Diogo Henrique (1) Montanari,Queli (1) Palavra-chave Aspergillus niger (1) Double-surface bioreactor (1) Endo-polygalacturonase (1) Enzyme stability (1) PH (1) Pectinase (1) Polygalacturonase (1) Production medium (1) Solid-state fermentation (1) Submerged process (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 2004 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Production and characterization of endo-polygalacturonase from Aspergillus niger in solid-state fermentation in double-surface bioreactor BABT Hendges,Diogo Henrique; Montanari,Queli; Malvessi,Eloane; Silveira,Mauricio Moura da. Endo-polygalacturonase (endo-PG) production by Aspergillus niger T0005/007-2 in solid medium with 170 mm of height was evaluated in a cylindrical double surface bioreactor in 96-h experiments. Cell concentration close to 92 mg.g -¹ dm (mg per g of dry medium) in the standard condition (static) was achieved, whereas in tests under forced aeration of 1.4 and 2.8 L.min-1. Kg-1 mm (L of air per minute per Kg of moist medium) and with the central shaft fungal biomass attained approximately 100 mg.g-1 dm. Superior endo-PG activity was obtained with the central-shaft system, 78 U.g-1 dm (units per g of dry medium). Forced aeration and pressure pulse showed no positive effect on the production of endo-PG, 45 U.g-1 dm and 28 U.g-1 dm, respectively. None of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus niger; Double-surface bioreactor; Endo-polygalacturonase; Solid-state fermentation; Enzyme stability. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200005 Influence of medium composition and pH on the production of polygalacturonases by Aspergillus oryzae BABT Malvessi,Eloane; Silveira,Mauricio Moura da. A liquid medium containing wheat bran, salts and a source of inducer (pectin) was found to be suitable for the production of exo- and endo-polygalacturonases by Aspergillus oryzae CCT3940. Induction of polygalacturonases by purified pectin was significantly higher than when rinds of citrus fruits were used as inducer. A. oryzae growth was favoured by pH close to 4, although a drop of pH to around 3 was needed for enzymes production. Afterwards, decreasing activities were observed with the normal increase in pH to near neutrality. The highest activities were achieved with an initial pH of 4 and controlled when it decreased to a value slightly below 3 (159 units endo-PG.mL-1 at 83 h and 45 units exo-PG.mL-1 at 64 h), being the loss in polygalacturonases... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pectinase; Polygalacturonase; Submerged process; Production medium; PH. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500004 Registros recuperados: 2 Primeira ... 1 ... Última

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