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http://dx.doi.org/10.3746/jkfn.2012.41.8.1176

Changes in Microbial and Physicochemical Properties of Single-Brewed Makgeolli by High Hydrostatic Pressure Treatment during Fermentation  

Ha, Su-Jeong (Dept. of Food and Nutrition, Kookmin University)
Yang, Seung-Kuk (Dept. of Food and Nutrition, Kookmin University)
In, Ye-Won (Dept. of Food and Nutrition, Kookmin University)
Kim, Yun-Ji (Division of Convergence Technology, Korea Food Research Institute)
Oh, Se-Wook (Dept. of Food and Nutrition, Kookmin University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.41, no.8, 2012 , pp. 1176-1181 More about this Journal
Abstract
This study was conducted to examine changes in the microbial and physicochemical properties of single-brewed Makgeolli in response to high hydrostatic pressure (HHP) treatment during various fermentation stages. HHP was applied in 2-day intervals at 400 MPa for 5 min during fermentation at $25^{\circ}C$. As a result, lactic acid bacteria showed 5~6 log reduction and reappeared at approximately 3~6 log cfu/mL as fermentation proceeded. Yeast also showed 5~6 log reduction but did not reappear during later fermentation period. HPP treatment did not result in any alcohol production on day 0 and 2. However, HPP treatment altered the pH and titratable acidity by reducing the number of microorganism. Reducing sugar contents of the samples increased continuously to 8.99% in 0 day treated sample and 5.01% in 2 day treated sample, whereas untreated Makgeolli contained 1.53% reducing sugars on 6 day due to alcohol conversion by yeast. Based on these results, HPP treatment during various fermentation stages altered the physicochemical properties of Makgeolli by changing the microbial community.
Keywords
Makgeolli; non-thermal technology; high hydrostatic pressure; physicochemical properties; microbial properties;
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Times Cited By KSCI : 16  (Citation Analysis)
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