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The temperature profiles of growth, thermal death and ethanol tolerance of the cellobiose-fermenting yeast Candida wickerhamii

✍ Scribed by Cecilia Cabeça-Silva; A. Madeira-Lopes; Prof. Dr. N. Van Uden

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
230 KB
Volume
25
Category
Article
ISSN
0233-111X

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✦ Synopsis

The temperature profiles of growth and thcrmel deat.h of tho cellobiose-ferment.ing yeast Candida wickerhamii was associative with the initial maximum, final maximum, optimum and minimum t,emperatures for growth around 38 "C, 35 "C, 31 "C and 3 "C, respcctively. Ethanol enhanccd thermal death by increasing the entropy of ac,tivat ion (entropy coefficient 7.2 entropy units mol-1 1-I), shifted the supraoptimal part of the profile t o lower tcmperstures without disrupting i t and increased the minimum temperhire for gromth. The temperature profile of ethanol tolerance wit.h respect t,o growth disphycd a narrow temperature plateau (18-22 "C) of maximum tolerance (limit 7.4%, v/v, ethmol) while the t.oxic cffects of ethanol increased steeply on either side of the platoau.

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