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Xylanolytic enzymes production by Aspergillus niger GS1 from solid-state fermentation on corn stover and their effect on ruminal digestibility Electron. J. Biotechnol.
Regalado,Carlos; Vázquez-Obregón,Immer; García-Almendárez,Blanca Estela; Domínguez-Domínguez,Jorge; Aguilera-Barreyro,Araceli; Amaro-Reyes,Aldo.
Hemicellulosic agricultural by-products such as corn stover (CS) are highly available materials which represent an opportunity to develop value added products. Native Aspergillus niger GS1 was used for solid-state fermentation (SSF) on alkali pre-treated CS (ACS) aimed to optimize xylanolytic enzymes production, and their effect on in vitro ruminal and true digestibility of ACS. Enzyme production was empirically modelled using a fractional factorial design 2(9-5), and the resulting significant factors were glucose, yeast extract and two mineral salts, which were arranged in a Draper-Lin optimization design at two levels. Predicted optimum xylanolytic activity of 33.6 U (mg protein)-1 was achieved at 48 hrs of SSF, and was validated by confirmatory...
Tipo: Journal article Palavras-chave: Aspergillus niger GS1; Corn stover; Digestibility; Solid-state fermentation; Xylanolytic activity.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000200009
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