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Characterization and Volatile Flavor Components in Glutinous Rice Wines Prepared with Different Yeasts of Nuruks  

Kim, Hye-Ryun (Traditional Food Research Division, Korea Food Research Institute)
Kwon, Young-Hee (Traditional Food Research Division, Korea Food Research Institute)
Jo, Sung-Jin (Traditional Food Research Division, Korea Food Research Institute)
Kim, Jae-Ho (Traditional Food Research Division, Korea Food Research Institute)
Ahn, Byung-Hak (Traditional Food Research Division, Korea Food Research Institute)
Publication Information
Korean Journal of Food Science and Technology / v.41, no.3, 2009 , pp. 296-301 More about this Journal
Abstract
In order to investigate the effect of different yeasts (La Parisienne (LP), Y18-2, Y54-3, Y90-2, Y90-9 and Y272-7) from nuruks on the quality of Glutinous rice wines, physicochemical properties and volatile flavor components were evaluated. Glutinous rice wines prepared with different yeasts were analyzed for ethanol, pH, total acid, amino acid, soluble solid, coloring degree, UV absorbance, reducing sugar, organic acid, free sugar and volatile compounds. After fermentation for 17 days, the ethanol contents ranged from 13.40 to 14.50%, while the total acid levels were from 0.33 to 0.44%. The amino acid contents in six samples ranged from 0.13 to 0.18%, while soluble solid contents ranged from 12.1 to $14.7^{\circ}Bx$. The glutinous rice wine prepared with LP showed the highest level of coloring degree, soluble solid and reducing sugar among six samples. Organic acid contents of the glutinous rice wine prepared with LP had the highest levels of lactic acid and acetic acid, while the glutinous rice wine prepared with Y90-9 had the highest level of succinic acid. In all glutinous rice wines tested, the most abundant free sugars were glucose followed by maltose. Volatile flavor components in the glutinous rice wines were identified by using GC-MSD. Nineteen esters, ten alcohols, eight acids, one aldehyde and one miscellaneous compound were identified in the glutinous rice wines. Using relative peak area, it was found that other than ethyl alcohol, hexadecanoic acid ethyl ester was the major component, predominantly found in the range of 2.73-10.41%. Phenylethyl alcohol, isoamyl alcohol, ethyl oleate, ethyl linoleate and tetradecanoic acid ethyl ester were some of the major volatile components present through the fermentation, respectively. Overall, it was shown that different yeast strains from nuruks greatly affected chemical and volatile characteristics of the glutinous rice wines.
Keywords
volatile flavor component; glutinous rice wine; yeast; fermentation;
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Times Cited By KSCI : 11  (Citation Analysis)
Times Cited By SCOPUS : 7
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