Characteristics of Takju (a Cloudy Korean Rice Wine) Prepared with Nuruk (a Traditional Korean Rice Wine Fermentation Starter), and Identification of Lactic Acid Bacteria in Nuruk
2014
Park, J.H., Sejong University, Seoul, Republic of Korea | Chung, C.H., Sejong University, Seoul, Republic of Korea
Five takju prepared using four types of nuruk (a traditional Korean fermentation starter made of malted wheat; non-cooked, naturally inoculated) labeled SH, SS, JJ, and SJ, and one type of koji (cooked, inoculated with an inoculum) labeled MN, were compared. Titratable acidity, pH, sugars, ethanol, amino acids, organic acids, and microbial changes in samples were measured, and the sensory properties were evaluated. Titratable acidity, alcohol, and organic acid content increased as sugar contents decreased. The overall ethanol concentration of all takju increased over time, reaching a maximum of 13.08-14.96% (w/v) at 7-21 days. The total amino acid contents of takju prepared with nuruk, except for one (SJ), were higher than the takju prepared with koji (MN). Lactic acid bacteria were also isolated from the starters. Sequence analysis of 16S rRNA genes (500-600bp) of 223 isolates revealed that the major strains were in the genera of Leuconostoc, Weissella, Pediococcus, and Lactobacillus.
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