Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Factors affecting to the Quality of Korean Soybean Paste, Doenjang

한국 된장의 품질에 영향을 미치는 요인

  • Shim, Hye-Jeoung (Department of Food Science and Nutrition, The Catholic University of Korea) ;
  • Yun, Jeong-hyun (Department of Food Biotechnology, Korea University of Science and Technology) ;
  • Koh, Kyung-Hee (Department of Food Science and Nutrition, The Catholic University of Korea)
  • Received : 2018.08.28
  • Accepted : 2018.10.28
  • Published : 2018.12.31
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Abstract

The quality of Korean doenjang, which was traditionally made for this study, was monitored for physicochemical properties, antioxidant capacity, and sensory properties at six months intervals for three years. The collected data were comprehensively analyzed using the k-means clustering via principal component analysis (PCA) to determine the optimal intake duration and sensory factors associated with acceptance. Doenjang samples were classified with every year interval based on PCA, and then the classified doenjang samples were further grouped into cluster one, two, and three based on the k-means clustering. In Cluster three, doenjang that was aged for thirty and thirty-six months, respectively, showed high total phenolic content, antioxidant capacity, superoxide dismutase like activity, and 2,2-diphenyl-1-picryl-hydrazyl radical scavenging capacity. Interestingly, along with acceptance, the levels of free amino acids and organic acids were higher in Cluster 3. The sensory factors found to be associated with acceptance included umami taste and brown color. In conclusion, this study proposes the intake of doenjang aged for thirty months based on its antioxidant activity and sensory properties although doenjang is usually ready after twelve months of aging.

된장의 최적 섭취 기간을 판단하기 위해 원료 대두로부터 3년 동안 발효 숙성 하면서 6개월 단위로 시료를 채취하여 분석하였다. 이화학적 분석, 항산화력과 관능 검사를 주성분분석과 k-평균 군집 분석하여 종합적인 품질 특성을 평가하였다. 된장의 품질 특성은 PCA에 의해 1년 간격으로 큰 변화가 확인되었고, 군집 분석에 의해 숙성 기간에 따라 각각 cluster 1, 2, 3의 군집으로 분류되었다. 건강기능성과 관련된 항산화력으로 총 페놀함량, SOD 유사활성, DPPH 라디칼 소거 능력은 cluster 3에서 높았다. Cluster 3에서는 맛과 관련된 관능 평가 항목과 유리아미노산, 유기산 등도 높게 나타났다. 기호도 평가도 cluster 3에서 높게 나타났고 기호도에 가장 큰 영향을 준 관능 항목 요인은 감칠맛과 갈색이었다. 따라서 된장은 숙성 12개월 이후부터 섭취 가능하지만 된장의 맛과 건강 기능적 측면을 동시에 고려한다면 숙성 30개월 이후가 된장의 최적 섭취 시기라고 할 수 있다.

Keywords

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