Abstract
The course of fermentation of benzaldehyde bySaccharomyces cerevisiae simultaneously fermenting a sugar substrate was studied by a polarographic method and gas chromatography. In single-dose experiments, 0.2% benzaldehyde was fermented. It was fermented within 90–120 minutes, giving rise to 23.1 to 39.2% phenylacetyl-carbinol and 40.5 to 24% benzyl alcohol. The addition of acetaldehyde to the fermentation medium retarded the transformation of benzaldehyde, lowered the formation of benzyl alcohol and raised the yield of phenyl-acetylcarbinol. In four-dose experiments the utilization of the individual doses of benzaldehyde for the formation of phenyl-acetylcarbinol is described.
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