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|Type:||Artigo de periódico|
|Title:||Galacto-oligosaccharides Production Using Permeabilized Cells of Kluyveromyces marxianus|
|Abstract:||Galacto-oligosaccharides are non-digestible carbohydrates and are recognized as important prebiotics for than stimulation of the proliferation of lactic acid bacteria and bifidobacteria in the human intestine. GOS can be produced by a transgalactosylation reaction catalysed by beta-galactosidase enzyme, and microorganisms can be used as a source of beta-galactosidase. In this work, a process for producing GOS using permeabilized cells of Kluyveromyces marxianus CCT 7082 was proposed. The effects of the concentrations of lactose and enzyme, temperature and pH were studied using a fractional design followed by a central composite rotatable design. The optimum conditions for galacto-oligosaccharides production were found to be: lactose concentration 500 g/L, enzyme concentration 10 U/mL, 45 degrees C and pH 7.0. Under optimized conditions, the GOS concentration, yield and productivity were 83 g/L, 16.5% and 27.6 g/L. h, respectively.|
|Editor:||Berkeley Electronic Press|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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