Journal of the Korean Society of Food Culture (한국식생활문화학회지)

Korean Society of Food Culture (한국식생활문화학회)
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Lactobacillus bulgaricus Fermentation Characteristics of Yogurt with added Buckwheat Sprout

Lactobacillus bulgaricus를 이용한 메밀싹 첨가 요구르트의 발효특성

  • Kang, Ha-Ni (Department of Food & Nutrition, Sookmyung Women's University) ;
  • Kim, Chul-Jai (Department of Food & Nutrition, Sookmyung Women's University)
  • 강하니 (숙명여자대학교 식품영양과학과) ;
  • 김철재 (숙명여자대학교 식품영양과학과)
  • Published : 2009.02.28
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Abstract

The principal objective of this study was to investigate the influence of buckwheat sprouts on the acid production and growth of lactic acid bacteria in to which 5 and 10%(w/v) buckwheat sprouts was added, followed by fermentation with Lactobacillus bulgaricus. In yogurt to which 5 and 10% buckwheat sprouts was added, pH was lower and titratable acidity was higher than those of the control. It was also noted significant changes in the number of viable cell counts with differing amounts of added buckwheat sprouts until 12 hours. When the yogurt samples were stored for 12 days at $4^{\circ}C$, the pH and titratable acidity of the yogurt to which 5 and 10% buckwheat sprouts was added were maintained at lower and higher than control levels, respectively. The highest number of viable cell counts was found in the yogurt to which 5% buckwheat sprouts was added. Rutin content was reduced via lactic acid fermentation, but quercetin content increased significantly in the yogurt with added buckwheat sprouts. It may be that the glycosidic bonds connected to rutin were hydrolyzed during fermentation by lactic acid bacteria. The total phenol compound content of the yogurt samples also increased after fermentation. The antioxidative activity of yogurt to which 10% buckwheat sprouts was added was shown to have a 60.95% free radical scavenging effect, which was the highest among all yogurt samples evaluated.

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References

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