The Korean Journal of Food And Nutrition (한국식품영양학회지)

The Korean Society of Food and Nutrition (한국식품영양학회)
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Quality Characteristics of Soybean Curd With Omija Extract

오미자 추출물을 첨가한 두부의 품질특성

  • Kim, Jwa-Suk (Dept. of Home Economics Education Education Research Institute, Gyeongsang National University) ;
  • Choi, Sun-Young (Dept. of Home Economics Education Education Research Institute, Gyeongsang National University)
  • 김좌숙 (경상대학교 가정교육과, 교육연구원) ;
  • 최선영 (경상대학교 가정교육과, 교육연구원)
  • Published : 2008.03.31
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Abstract

This study used Omija extract as a natural congelation to compare and analyze soybean curd's physicochemical and sensory quality characteristics in order to improve functional benefits and taste of soybean curd. When Omija extract concentration increased, protein content went up considerably while crude fat and yield significantly decreased. In the pH change, the group with Omija extract were lower than control and the change was not much noticeable but slightly checked as the storage period was extended. The turbidity tended to increase as the storage period was longer. In the acidity change, the group with 0.5% Omija extract showed rapid increase on the 4th day after starting storage, and it can be interpreted that decomposition started at the moment. As the storage period was extended, brightness and yellowness remarkably decreased and redness considerably enhanced: higher concentration Omija extract worked to decreased brightness and to increase yellowness and redness. In accordance with the storage period, hardness, brittleness and gumminess increased and springness decreased, but there was no considerable change in cohesiveness: in accordance with the concentration, hardness, brittleness and gumminess significantly increased, but there was no considerable change in cohesiveness. In terms of sensory quality, the group with 1% of Omija extract showed the best appearance, flavor, taste and after swallowing results. The group with 1% Omija extract was the most preferred, $4.89{\pm}0.32$ in the overall preference. In conclusion, adding Omija extract can improve soybean curd's physicochemical and sensory quality characteristics. Moreover, the extracts can be expected to play an important role in encouraging Omija's value and widening its appliances to various food.

Keywords

References

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