Microaerophilic metabolism of Pachysolen tannophilus at different pH values |
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| Authors: | Attilio Converti Patrizia Perego José Manuel Domínguez |
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| Institution: | (1) Department of Chemical and Process Engineering  G.B. Bonino , University of Genoa, Via Opera Pia 15, 16145 Genoa, Italy;(2) Departamento de Ingenieria Química, Universidad de Vigo, Campus de Ourense, As Lagoas s/n, 32004 Ourense, Spain |
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| Abstract: | Microaerophilic production of xylitol by Pachysolen tannophilus from detoxified hemicellulose hydrolyzate was optimal between pH values 6.0 to 7.5 when about 90% of xylose was utilized for xylitol production, the rest being fermented to ethanol. At pH values of 3.0 and 12.0, respiration became important, consuming up to 30% of available xylose. A graphic procedure suggests that histamine and cysteine are at the active site of xylose reductase in this yeast. |
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| Keywords: | microaerophilic conditions Pachysolen tannophilus pH variation xylitol production |
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