Abstract
Fermentation yeast was newly isolated from a traditional Vietnamese microbial starter for brewing alcoholic beverages, called men. The isolated yeast was identified as a strain of the Saccharomyces cerevisiae and designated as S. cerevisiae Y3. The alcoholic beverage made with 3 yeast strains, Y3, NP01, and K7 from uncooked and cooked nonglutinous rice grains had an ethanol concentration of approximately 11.6 to 14.5% (v/v). Resulting alcoholic beverages made with Y3, NP01, and K7 yeasts had antioxidative activity. The DPPH radical scavenging activity of the alcoholic beverages made with 3 yeast strains is equivalent to approximately 500 to 600 μM Trolox. The DPPH radical scavenging activity of the alcoholic beverage made with Y3 yeast was higher than that of the alcoholic beverage made with NP01 and K7 yeasts. The inhibitory activity of lipid peroxidation of the alcoholic beverages made with Y3 and NP01 yeasts was higher than that of the alcoholic beverages made with K7 yeast.
 Keywords: men, fermentation yeast, antioxidative activity, uncooked fermentation
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