pH Regulation in Solid State Culture through the Initial Ratio Between Oxidized and Reduced Sources of Nitrogen. A Model Applicable to the Amylase Production by Aspergillus Oryzae

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1998 English Publisher:Springer Science and Business Media LLCJournal:Biotechnology Techniques, volume 12, pages 411-415 (issn: 0951-208X, eissn: 1573-6784,

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Authors: Torrado, Ana; González Fernández, Pilar; Murado García, Miguel Anxo;

doi: 10.1023/a:1008838701678

handle: 10261/57968

pH Regulation in Solid State Culture through the Initial Ratio Between Oxidized and Reduced Sources of Nitrogen. A Model Applicable to the Amylase Production by Aspergillus Oryzae

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Abstract

In cultures of Aspergillus oryzae on polyurethane foam soaked in an amylaceous effluent, the rates of intake of oxidized and reduced sources of N act as a regulator of the pH in the range 4 to 7. Sinse the intake rates depend on the relative concentrations of both sources, its initial ratio can be used as a resource to control the pH profile, a factor that effects to the accumulation of amylases. A model is proposed which describes the simultaneous intake of different forms of N as a function of its relative concentrations, the biomass present and the growth rate.

CICYT and Xunta de Galicia, projects ALI-789-90, AMB93-0136 and XUGA-40204B-92

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Related Organizations

Spanish National Research Council
Spain
Instituto de Investigaciones Marinas
Spain

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