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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Study on Antioxidant Activities of Extracts from Different Parts of Korean and Iranian Pomegranates

국내산과 이란산 석류 부위별 추출물의 항산화 활성

  • Jin, So-Yeon (Dept. of Traditional Dietary Life Food, Graduate School, Sookmyung Women's University)
  • 진소연 (숙명여자대학교 전통문화예술대학원 전통식생활문화전공)
  • Received : 2011.04.14
  • Accepted : 2011.07.04
  • Published : 2011.08.31
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Abstract

This study analyzed the functional components and antioxidant activities of pomegranate juice and pomegranate husk, endocarp and seed extracts by comparing Korean and Iranian pomegranates. Korean pomegranate husk (KPH) had the highest total polyphenol content among the pomegranate extracts, and total phytoestrogen content was highest in Korean pomegranate endocarp (KPE). Iranian pomegranate endocarp (IPE) and Iranian pomegranate husk (IPH) showed the highest flavonoid levels. Overall, Korean pomegranate had more functional components than those in Iranian pomegranate. KPE had the highest DPPH radical scavenging activity and superoxide dismutase like-activity among all of the extracts, and KPH had the highest nitrite scavenging activity. IPE showed the highest superoxide anion scavenging activity. The ABTS$^+$ assay also indicated that IPH had the highest antioxidant activities. This study also showed that the more total polyphenols, flavonols, and phytoestrogens the pomegranate contained, the higher antioxidant activities. A positive correlation was observed between total polyphenol, flavonol and phytoestrogen levels and antioxidant activities. Korean pomegranates contained more functional components and had higher antioxidant activity than those of Iranian pomegranates. Additionally, pomegranate endocarp and seed extracts were better than pomegranate juice in terms of functional components and antioxidant activity. These results suggest that pomegranate husk, endocarp and seed extracts as well as pomegranate juice may have value as natural antioxidants with their high quality functional components and antioxidant activity.

이란산과 국내산 석류를 착즙하여 과즙과 부산물로 버려지는 외피, 내피, 씨의 4부분으로 나누어 기능성 성분과 항산화능을 분석하였다. 석류 부위별 추출물의 기능성 성분 중 총 페놀 함량은 국내산 석류 외피가 210 mg/g${\pm}$8.08로 가장 높았고, 플라보노이드의 함량은 이란산 석류 내피와 이란산 석류 외피가 가장 높았다. Phytoestrogen 함량은 이란산에 비해 국내산 석류 내피에서 96.04 ${\mu}g/mL$로 가장 높게 측정되어 전반적으로 이란산 석류보다 국내산 석류의 기능성 성분의 함량이 높았다. 부위별 석류 에탄올 추출물의 DPPH 라디칼 소거활성과 SOD 유사활성, 환원력은 국내산 석류 내피의 활성이 가장 높았고 superoxide anion 소거활성에서는 이란산 석류 내피의 활성이 가장 높았다. ABTS$^+$ 소거활성에서는 이란산 석류 외피의 항산화능이 가장 높게 측정되었고, 아질산염 소거활성은 국내산 석류 외피추출물이 가장 높았다. 또한 석류의 총 폴리페놀, 플라보노이드, 식물성 에스트로겐의 양이 높을수록 항산화성이 높아 양의 상관관계를 나타냈다. 이상의 결과에 따르면, 기능성 성분은 국내산 석류에서 함량이 높았고 항산화활성은 각 항산화 측정방법에 따라 조금씩 차이가 있지만 대체적으로 국내산 석류의 항산화능이 높게 분석되었다. 또한 부위별로 비교해 본 결과 석류는 과즙보다 껍질과 씨 부분 특히 내피에 기능성 성분의 함량이 많고 항산화 활성도 높게 나타났다. 따라서 과즙 착즙 시 버려지는 부산물인 석류의 외피와 내피는 기능성 성분 및 항산화성이 우수하여 식품의 산화방지를 위한 천연 항산화제로서의 가치가 있을 것으로 사료된다.

Keywords

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