Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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The Antioxidant Ability of Grape Seed Extracts

포도씨 추출물의 항산화성

  • Jang, Jae-Kweon (Department of Food Biotechnology, Chungkang College of Cultural Industries) ;
  • Han, Ji-Young (HaiTai Food Confectionery Research Center)
  • 장재권 (청강문화산업대학 식품생명과학과) ;
  • 한지영 (해태제과 연구소)
  • Published : 2002.06.01
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Abstract

The study was carried out to evaluate the antioxidant activity of grape seed extracts by measuring acid value, peroxide value (POV), thiobarbituric acid reactive substances (TBARS value) and electron donating ability by 1,1-dipheny1-2-pycryl hydrazil (DPPH) method. Total phenol content of freeze dried crude solvent extracts increased in the order of ethanol>acetone>hot water. Among extracts, the total phenol content of 70% ethanol extract of grape seed (GSE) was the highest, 51%. Besides the total phenol, the other major components of GSE were crude carbohydrate (29.63%), crude protein (3.38%) and crude lipid (2.84%). The acid values of crude rice bran oil containing GSE or several antioxidants at the concetration of 0.01% were 52.3 for the control, 0.5 for GSE, 2.3 for dibutyl hydroxytoluene (BHT), 45.0 for tertiarybutyl hydroxy quinone (TBHQ), 29.9 for tocopherol and 37.7 for ascorbic acid. The POVs for linoleic acid methyl ester in the presence of 0.01% antioxidants were 1220 meq/kg in control, 55 meq/kg in GSE, 104 meq/kg in BHT, 952 meq/kg in tocopherol and 71 meq/kg in GSE, 37% in BHT, 37% in tocopherol and 52% in ascorbic acid. The electron donating abilities by DPPH in the presence of 0.01% antioxidants were 95.3% in GSE, 75.0% in BHT, 96.3% in tocopherol and 98.2% in ascorbic acid. These results indicated that the antioxidants activities of GSE were significantly higher than those of several antioxidants compared.

지방질 식품에 대한 천연항산화제로서 포도씨의 항산화력을 비교하기 위해 용매를 달리하여 추출하고, 그 추출물을 동결건조하여 건조수율, 페놀함량, 일반성분 및 항산화 효과를 측정하였다. 건조수율과 총 페놀함량은 70%(v/v) 에탄올을 용매로 하여 가열조건에서 추출하였을 때 각각 4.3%와 51%로 가장 높은 결과를 나타내었으며 일반성분함량은 섬유질이 가장 높았고 회분과 단백질 및 조지방이 3% 내외로 함유되어 있었다. 70% 에탄올 포도씨 추출물(GSE)과 기존 항산화제인 ascorbic acid, ${\alpha}-tocopherol$ 및 BHT 들과의 항산화 효과를 비교하였을 때 산가, 과산화물가, TBARS에서 GSE가 가장 높은 항산화활성을 보였고 DPPH에서의 전자공여능도 95% 정도의 높은 항산화활성을 나타내었다.

Keywords

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