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Free Radical Scavenging Ability and Quality Characteristics of Yanggaeng Combined with Grape Juice

포도즙을 첨가한 양갱의 품질특성 및 유리기 소거능

  • Park, Cho-Hee (Dept. of Food and Nutrition, Chungnam National University) ;
  • Kim, Kyoung-Hee (Dept. of Food and Nutrition, Chungnam National University) ;
  • Yook, Hong-Sun (Dept. of Food and Nutrition, Chungnam National University)
  • 박초희 (충남대학교 식품영양학과) ;
  • 김경희 (충남대학교 식품영양학과) ;
  • 육홍선 (충남대학교 식품영양학과)
  • Received : 2013.11.22
  • Accepted : 2014.08.07
  • Published : 2014.08.30

Abstract

We investigate the quality characteristics and free radical scavenging ability of yanggaeng prepared with different amounts of grape juice (GJ). GJ was incorporated into yanggaeng at different levels (containing 50, 100, 150, and 200 g of GJ in yanggaeng, respectively) based on the total weight of water. Sugar contents showed a significant increase; however, pH showed a decrease with increasing levels of GJ. In terms of color, lightness and yellowness decreased significantly but redness increased with increasing levels of GJ. In a texture profile analysis, hardness were increased; however, springiness, cohesiveness, gumminess, and chewiness decreased with increasing levels of GJ. Total polyphenol content and 1,1-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity increased significantly as the GJ concentration increased in the formulation. The sensory evaluation indicated that yanggaeng containing the 150 g level of GJ showed the best preference in terms of color, taste, texture, flavor, and overall acceptance. These results suggest that grape juice may be a useful ingredient in yanggaeng to improve quality and antioxidant potential.

본 연구에서는 포도즙의 양(0 g, 50 g, 100 g, 150 g, 200 g)을 다르게 첨가하여 포도 양갱을 제조하고, pH, 당도, 색도, 기계적 물성, 총 페놀 함량, DPPH, 관능평가를 실시하였다. 포도양갱의 pH는 포도즙의 첨가량이 증가할수록 pH 값이 낮아지면서 유의적인 차이를 보였으며, 당도는 대조군이 1.47 Brix로 가장 낮게 나타났고, 포도즙 첨가량이 증가할수록 당도가 점점 높아져 유의적인 차이를 보였다. 색도는 명도값(L값)과 황색도(b값)이 포도즙 첨가량이 증가할수록 감소하였으나, 적색도(a값)는 그와 반대로 증가하였다. 물성 측정 결과, 포도즙 첨가가 증가할수록 경도는 증가하는 경향을 보였지만, 탄력성, 응집성, 점착성, 씹힘성은 모두 감소하는 경향을 보였다. 총 페놀 함량은 포도즙 첨가량이 증가할수록 높은 값을 보였으며, DPPH radical 소거능도 총 페놀 측정 결과와 마찬가지로 대조군에서 가장 낮은 활성을 나타내었으며, 포도즙 첨가가 증가할수록 높은 항산화 활성을 보였다. 관능평가 결과, 색, 향, 맛 등의 전체적인 기호도에서 포도즙 150 g 첨가군이 가장 높은 점수를 받았다. 이상의 결과를 종합하여 볼 때 항산화 실험에서 포도즙 200 g 첨가군의 결과가 가장 좋았으나, 관능검사 결과, 포도즙 150 g 첨가군을 가장 선호하는 결과를 함께 고려해 볼 때는 포도즙 150 g이 첨가된 양갱시료의 실용화가 바람직 할 것으로 사료된다.

Keywords

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