Journal of Dairy Science and Biotechnology

Korean Society of Dairy Science and Biotechnology (한국낙농식품응용생물학회)
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A Study on the Quality Properties of Yogurt containing Makgeolli (Korea Rice-Wine)

쌀막걸리를 첨가한 요구르트의 품질특성에 관한 연구

  • Lee, Jai-Sung (Central Research Institute Dongwon F&B Co. Ltd.) ;
  • Bae, Inhyu (Dept. of Animal Science and Technology, Sunchon National University)
  • 이재성 (동원F&B 식품과학연구원) ;
  • 배인휴 (순천대학교 생명산업과학대학 동물자원과학과)
  • Received : 2017.06.19
  • Accepted : 2017.06.26
  • Published : 2017.06.30
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Abstract

This study was conducted to evaluate the quality characteristics of yogurt containing 5.0%, 10.0%, and 20.0% rice-wine (RW), which was added during the preparation of yogurt. Changes in pH, total titratable acidity (TA), bacterial lactic acid, yeast population, viscosity, whey separable phenomenon, and cumulative gas production were monitored during the fermentation and storage of yogurt. The pH was decreased following all treatments, and TA and viscosity were gradually increased during fermentation. The pH of RW yogurt was lower than that of the control sample, and TA was higher than the control during fermentation. The viscosity of yogurt containing 5.0% and 10.0% RW yogurt was higher than that of the control sample at 0~6 h. Cumulative gas production and whey separable phenomenon increased as the amount of RW added increased during fermentation. Viscosity was higher in control yogurt than in RW yogurt during storage. The total acceptability, texture, odor, color, sweet taste, and yogurt taste were higher in the control than in all RW groups.

본 연구는 쌀막걸리를 요구르트 제조시 5.0%, 10.0% 그리고 20.0% 비율로 첨가하여 배양중과 저장중에 pH, TA, 생균수, 점도, 유청분리현상, 가스생성량을 측정하였으며, 완제품에 대해 알코올 함량 및 관능을 분석하였다. 배양 중 pH와 TA의 변화는 막걸리 자체 낮은 pH로 인해 대조구에 비해 높은 산생성력을 나타내었으며, 배양 중 유산균수의 결과 대조구보다 첨가구에서 높은 유산균수를 나타내었다. 배양중 점도의 결과 배양 5시간까지 대조구보다 첨가구에서 높은 점성을 나타내었으며, 유청분리현상은 대조구와 5.0% 첨가구에서는 안정성이 확인되었으나 10.0%와 20.0% 첨가구에서는 배양시간이 경과 될 수록 높은 유청분리현상을 확인 할 수 있었다. 배양 중 가스 발생량은 첨가량이 많을 수록 높은 발생량을 보였으며, 저장중 발생량은 저장 4일차부터 모든 시험구에서 점차적으로 감소하는 경향을 나타내었다. 저장 중 알코올 함량은 20.0% 첨가구를 제외한 나머지 시험구에서는 발생되지 않았다. 완제품에 대한 관능검사 결과 전반적인 기호도에서 대조구가 높은 점수를 보였지만 감미료 사용 시 대조구와 유사한 관능평가가 기대된다. 이로써 요구르트 제조시 쌀막걸리를 5.0% 첨가 시 제조 시간 단축 및 쌀 막걸리의 기능성이 가미된 기능성 요구르트 제조가 가능할 것으로 사료된다.

Keywords

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