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Zymological Properties of Foxtail Millet Wine-making by Isolated Strains from Nuruk  

Yu, Cheol-Hun (Faculty of Horticultural and Life Science, Cheju National University)
Hong, Sung-Yeun (Woori Nong San Mul Agricultural Co.)
Koh, Jeong-Sam (Faculty of Horticultural and Life Science, Cheju National University)
Publication Information
Applied Biological Chemistry / v.45, no.3, 2002 , pp. 138-144 More about this Journal
Abstract
In order to improve the quality of foxtail millet wine, zymological properties by isolated strains from Nuruk were investigated. Saccharomyces sp Y5-1 as brewing yeast, Aspergillus sp. M6-3, Aspergillus awamori 6970, and Aspengillus usamii mut. shirousamii 6959 (KCTC) as saccharifying molds were used, respectively. Acid content, soluble solids, color (b) and alcohol contents were increased during fermentation. Ethanol concentration of millet wine made with Nuruk by Aspergillus awamori 6970 and Aspergillus usamii mut. shirousamii 6959 were higher than the other, 10.6 and 10.1% respectively. Citric acid was only detected on $1{\sim}2$ day starting fermentation. Oxalic acid, lactic acid and acetic acid of millet wine were high in the wine made of Nuruk by Aspergillus usamii mot. shirousamii 6959, Aspergillus awamori 6970 and traditional Nuruk, respectively. During fermentation, glucose and xylose was higher than the others. Xylose was increased, but most of other sugar were decreased during fermentation. Acetone, ethyl acetate, methanol, ethanol, n-propanol, iso-buthanol and iso-amyl alcohol were detected In the wine made with Nuruk by Aspergillus awamori and Aspergillus usamii mut. shirousamii, iso-imyl alcohol and ethanol were high. On sensory evaluation, the wine made with Nuruk by Aspergillus usamii mut. shirousamii was the best on color and taste.
Keywords
foxtail millet wine; zymological property; Aspergillus; Saccharomyces; Nuruk;
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