Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Preparation and characteristics of yogurt added with Korean rice wine lees powder

주박 분말 첨가 요구르트의 제조 및 특성

  • Kim, Dong Chung (Department of Integrated Materials Engineering, Chungwoon University) ;
  • In, Man-Jin (Department of Human Nutrition and Food Science, Chungwoon University)
  • Received : 2016.07.29
  • Accepted : 2016.09.02
  • Published : 2016.12.31
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Abstract

This study was performed to evaluate the quality characteristics of curd yogurt with different contents [0.5~2.0% (w/w)] of Korean rice wine lees powder (KRWLP). Yogurt was fermented with commercially available mixed lactic acid bacteria (Lactobacillus acidophilus, Bifidobacterium longum, Streptococcus thermophiles) at $40^{\circ}C$ for 15 h. Acid production (pH and titratable acidity) of yogurts increased with increasing KRWLP content. After 12 hours fermentation, titratable acidity of KRWLP yogurt was 1.19~1.29 % and was higher than that (1.07 %) of yogurt made without KRWLP. And also, the number of viable lactic acid bacterial cell increased and the culture time to obtain maximum number of lactic acid bacteria cell decreased with the addition of KRWLP. The curd stability in yogurt was significantly enhanced by repression of whey separation in KRWLP yogurt. In sensory evaluation, there was a similar preference for KRWLP yogurts and the control. These results suggest that KRWLP can be used as foodstuff to improve the quality characteristics of yogurt.

본 연구에서는 주박 분말을 발효식품에 이용하고자 상업용 Lactobacillus acidophilus, Bifidobacterium longum, Streptococcus thermophilus 혼합 균주를 이용하여 탈지분유와 주박 분말로 요구르트를 제조하고 주박 분말의 첨가량에 따른 요구르트의 발효특성을 조사하였다. 탈지분유에 주박을 0.5~2.0 % 첨가한 결과 적정산도는 주박의 사용량에 비례하여 증가하였으며, 12시간 후 대조구 1.07 %에서 주박 분말 첨가 요구르트는 1.19~1.29 %로 증가하였다. pH의 변화도 적정산도의 변화와 일치하는 경향이었다. 젖산균 생균수는 주박 분말의 첨가량에 비례하여 증가하였으며, 젖산균 수가 최대로 증가하는 시간도 주박 분말의 첨가량이 증가할수록 단축되었다. 대조군은 15시간 후 8.77 log CFU/g로, 2.0 % 첨가군은 9시간 후 8.96 log CFU/g까지 증가하였다. 또한 주박 분말의 첨가량에 따라 유청 비율은 감소하여 주박 분말이 유청 분리를 억제하여 커드의 안정성에 기여하였다. 주박 분말을 첨가한 요구르트는 대조군과 관능적으로 차이가 없었다.

Keywords

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