밤 삽피의 페놀산 조성과 항산화 활성

Phenolic Acid Composition and Antioxidative Activity of Chestnut Endoderm

  • Kim, Young-Chan (Dept. of Food Science and Technology, Kyungpook National University) ;
  • Kim, Mi-Yeon (Dept. of Food Science and Technology, Kyungpook National University) ;
  • Chung, Shin-Kyo (Dept. of Food Science and Technology, Kyungpook National University)
  • 발행 : 2002.08.31

초록

밤 삽피의 천연 항산화제로서의 이용 가능성을 검토하기 위하여 밤 삽피로부터 유리형(EPA), 에스데르형(EPA), 결합형(BPA) 페놀산 획분을 분리하였다. 각 획분의 수율은 유리형 0.794%, 에스테르형 1.236%,결합형이 1.937%였으며 이중 페놀성 화합물의 함량은 에스테르형이 65.19%로 가장 높았다. Gas chromatography로 각 획분의 페놀산의 조성과 함량을 조사한 결과 유리형 획분에서 gallic acid(4.63%), ellagic acid(3.49%), salicylic acid(3.19%), gentisic acid(1.5%)가, 에스테르형 획분에서 gallic acid(13.4%), ellagic acid(11.6), protocatechuic acid(0.9%)가 주요 페놀산으로 확인 되었으며,결합형 획분에서는 gallic acid는 확인되지 않고 다른 획분에 비하여 sinapic acid(1.33%)가 높은 함량을 보였다. 이들 획분의 항산화성을 DPPH 라디칼 소거능, hydroxyl radical 소거능, 지질과산화물 생성 억제 시험으로 조사한 결과 유리형, 에스데르형, 결합형 획분의 순으로 항산화 활성이 우수한 것으로 조사되었다.

Free, soluble esterified and insoluble bounded phenolic acids were separated from Eungi chestnut endoderm. The composition and contents of phenolic acid were analyzed by gas chromatography, and their antioxidant activity was examined by DPPH assay, 2-deoxyribose oxidation, and ferric thiocyanate method. Gallic, ellagic, salicylic, and gentisic acids in free phenolic acid fraction, gallic, ellagic, and protocatechuic acids in soluble esterified fraction, sianpic and gentisic acids were the major phenolic acids in insoluble bounded fraction. Marked differences were observed in the phenolic acid composition and contents among the fractions. Free phenolic acid fraction showed the strongest antioxidant activity. Results revealed chestnut endoderm could be a potential antioxidant source containing gallic and ellagic acids.

키워드

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