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Hydrogen sulfide production by Saccharomyces cerevisiae UCD 522 in a synthetic grape juice medium deficient of thiamin (vitamin B ) and/or pyridoxine (vitamin B ).

08:00 EDT 12th September 2019 | BioPortfolio

Summary of "Hydrogen sulfide production by Saccharomyces cerevisiae UCD 522 in a synthetic grape juice medium deficient of thiamin (vitamin B ) and/or pyridoxine (vitamin B )."

The impacts of thiamin and pyridoxine along with YAN on alcoholic fermentation and hydrogen sulfide production by S. cerevisiae were studied. Using a synthetic grape juice medium, three fermentation trials were conducted; (a) 2 x 3 factorial design with thiamin (0, 0.2, or 0.5 mg L ) and YAN (60 or 250 mg L ) as variables, (b) 2 x 3 factorial design with pyridoxine (0, 0.25, or 0.5 mg L ) and YAN (60 or 250 mg L ) as variables, and (c) 3 x 3 factorial design with thiamin (0, 0.2, or 0.5 mg L ) and pyridoxine (0, 0.25, or 0.5 mg L ) as variables in media containing 60 mg L YAN. Although the progress of fermentations were affected by thiamin or pyridoxine, YAN had a larger impact than either vitamin. H S production was significantly lower with increasing amounts of thiamin in those fermentations under low YAN (60 mg L ) while even lower amounts (<30 µg L ) were produced under high YAN (250 mg L ) with or without the vitamin. The highest amounts of H S were synthesized in those fermentations without any pyridoxine (>110 µg L ), with the lowest production in media with pyridoxine and high YAN (<20 µg L ).

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Name: Letters in applied microbiology
ISSN: 1472-765X
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