ISSN:
0268-2575
Keywords:
Acetobacter
;
bioconversion
;
primary alcohols
;
acids
;
flavour
;
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
--The biotransformation of four alcohol substrates (butanol, 2-methylbutanol, 3-methylbutanol and 2-phenylethanol) into their acids was studied using a strain of Acetobacter aceti. Bioconversion yields depended on the molecular structure of the alcohol. Biotransformation of high concentrations of alcohols was possible until the precursor reached an inhibiting concentration (3·8 g dm-3 for butanol and 3-methylbutanol, 4·2 g dm-3 for 2-methylbutanol). In contrast, biotransformation of 2-phenylethanol decreased when alcohol concentration was higher than 0·3 g dm-3. Dissolved oxygen concentrations and pH conditions of the medium were important factors in improving bioconversion. Transformation of 2-methylbutanol into the corresponding acid was increased when dissolved oxygen partial pressure increased from 60 to 80% and regulation at pH 6 allowed an increase in the production of butyric acid from butanol. © 1997 SCI.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
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