TY - JOUR
T1 - Fermentation and microbial characteristics of Korean traditional fermented milk, Tarak
AU - Jung, Jin Kyoung
AU - Ko, Seong Hee
AU - Oh, Se Wook
AU - Lim, Ji Young
AU - Chun, Taehoon
AU - Kim, SooA
AU - Myoung, Kil Sun
AU - Jang, Sung Seek
AU - Huh, Chul Sung
AU - Han, Young Sook
PY - 2015
Y1 - 2015
N2 - In this study, for modernization of Korean traditional fermented milk, Tarak was made using four kinds of commercial Makgeolli based on the ancient cookbook Suwoonjabbang. Samples of Tarak were periodically collected during 24 h of fermentation at 37°C. After fermentation, changes in pH, titration acidity, and viscosity were analyzed. Fermentation metabolites, including organic acids and free sugars, were analyzed by HPLC. Numbers of yeast and lactic acid bacteria during 24 h of fermentation were measured. The pH of Tarak significantly decreased (P<0.01), whereas its acidity significantly increased (P<0.01) during fermentation. The viscosity increased during 8∼24 h of fermentation until curd was separated in Tarak. The level of ethanol increased from 0.37∼0.52 mg/mL to 0.51∼0.71 mg/mL during 24 h of fermentation. Lactic acid and lactose were the major organic acid and free sugar in Tarak, respectively. The number of lactic acid bacteria increased from 5.23∼6.25 log CFU/mL to 9.87∼10.41 log CFU/mL at the beginning during 24 h of fermentation. The number of yeast increased from 5.14∼6.47 log CFU/mL to 6.99∼7.73 at the beginning during 24 h of fermentation at 37°C. The major strains of Tarak were Pediococcus acidilactici, Lactobacillus fermentun, Lactobacillus curvatus, and Saccharomyces cerevisiae. Therefore, we concluded that Tarak was a fermented milk by both lactic acid bacteria and yeast, which was similar to koumiss or kefir.
AB - In this study, for modernization of Korean traditional fermented milk, Tarak was made using four kinds of commercial Makgeolli based on the ancient cookbook Suwoonjabbang. Samples of Tarak were periodically collected during 24 h of fermentation at 37°C. After fermentation, changes in pH, titration acidity, and viscosity were analyzed. Fermentation metabolites, including organic acids and free sugars, were analyzed by HPLC. Numbers of yeast and lactic acid bacteria during 24 h of fermentation were measured. The pH of Tarak significantly decreased (P<0.01), whereas its acidity significantly increased (P<0.01) during fermentation. The viscosity increased during 8∼24 h of fermentation until curd was separated in Tarak. The level of ethanol increased from 0.37∼0.52 mg/mL to 0.51∼0.71 mg/mL during 24 h of fermentation. Lactic acid and lactose were the major organic acid and free sugar in Tarak, respectively. The number of lactic acid bacteria increased from 5.23∼6.25 log CFU/mL to 9.87∼10.41 log CFU/mL at the beginning during 24 h of fermentation. The number of yeast increased from 5.14∼6.47 log CFU/mL to 6.99∼7.73 at the beginning during 24 h of fermentation at 37°C. The major strains of Tarak were Pediococcus acidilactici, Lactobacillus fermentun, Lactobacillus curvatus, and Saccharomyces cerevisiae. Therefore, we concluded that Tarak was a fermented milk by both lactic acid bacteria and yeast, which was similar to koumiss or kefir.
KW - Fermented milk
KW - Korean traditional fermented milk
KW - Microbial characteristics
KW - Tarak
UR - http://www.scopus.com/inward/record.url?scp=84928622190&partnerID=8YFLogxK
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U2 - 10.3746/jkfn.2015.44.4.602
DO - 10.3746/jkfn.2015.44.4.602
M3 - Article
AN - SCOPUS:84928622190
SN - 1226-3311
VL - 44
SP - 602
EP - 609
JO - Journal of the Korean Society of Food Science and Nutrition
JF - Journal of the Korean Society of Food Science and Nutrition
IS - 4
ER -