Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Quality Characteristics and Antioxidant Activities of Aged Black Chestnut Inner Shells

숙성 흑율피의 품질 특성 및 항산화성

  • Kim, Jin Ho (Department of Food & Nutrition, Chungnam National University) ;
  • Lim, Won Jeong (Department of Food & Nutrition, Chungnam National University) ;
  • Kim, Mee Ree (Department of Food & Nutrition, Chungnam National University)
  • 김진호 (충남대학교 식품영양학과) ;
  • 임원정 (충남대학교 식품영양학과) ;
  • 김미리 (충남대학교 식품영양학과)
  • Received : 2016.09.30
  • Accepted : 2017.02.11
  • Published : 2017.03.31
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Abstract

The study was conducted to compare quality characteristics and antioxidant activities of aged black chestnut inner shells (ACI) and raw chestnut inner shells (RCI). RCI were aged for 15 days at high humidity and temperature. As storage time progressed, the pH level decreased while acidity increased. The sugar concentration ($^{\circ}Brix$) and reducing sugar concentration (%) increased during storage, whereas L (lightness) decreased. Compared with RCI, L value of ACI was darker than that of RCI after 9 days of storage. In the Hunter color system, L and a (redness) values of ACI were higher than those of RCI, whereas there was no visible difference in degree of aging. Although total phenol contents increased with degree of aging, phenol contents of ACI increased more than those of RCI after 9 days of aging. $IC_{50}$ values for 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radical scavenging activities decreased with degree of aging. Based on these results, it is suggested that aged black chestnut inner shells were appropriate in terms of both physicochemical and antioxidative activities.

본 연구는 항산화성이 우수하지만 폐기물로 버려지는 생율피를 숙성하여 생율피와 숙성 율피의 품질특성과 항산화능을 분석하였다. 환원당과 가용성 고형물 함량은 생율피보다 숙성이 진행됨에 따라 증가하여 시료 간에 유의적 차이를 나타내었다. pH는 숙성기간이 경과함에 따라 감소하였고, 산도는 증가하였다. 명도는 숙성이 진행되면서 감소하였고 적색도는 증가하였으며, 황색도는 점점 감소하는 경향을 나타내었다. 항산화능은 DPPH 라디칼 소거능 및 hydroxy 라디칼 소거능 모두 숙성기간이 경과함에 따라 $IC_{50}$ 값이 낮아져 항산화능이 높아졌는데, 이는 총페놀 함량이 숙성이 진행되면서 증가한 데 기인되었다. 율피를 건조하여 분말화한 후 열수에 타서 차로 관능 평가한 결과, 숙성기간이 경과될수록 단맛은 증가하였고 떫은맛은 감소하였다. 전반적인 기호도는 12일과 15일이 유의적인 차이가 없이 높게 나타났다. 이 같은 결과를 종합해 볼 때 율피를 본 실험조건에서 숙성 시 12~15일이 적당하였으며, 숙성 율피는 생율피보다 항산화성이 더 우수할 뿐 아니라 기호도도 우수한 것으로 나타났으므로 식품가공 시 다양하게 활용할 수 있을 것으로 생각된다.

Keywords

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