Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Effects of Antioxidant Activities in Ethanol Extract of Apple Peel, Grape Peel, and Sweet Potato Peel as Natural Antioxidant

천연 항산화제로의 활용을 위한 사과, 포도, 및 고구마 껍질 에탄올 추출물의 항산화 효과

  • Kim, Mi-Ja (College of Biotechnology & Bioengineering, Sungkyunkwan University) ;
  • Kim, Young Gi (Dept. of Conversing Technology, Graduate School of Venture, Hoseo University) ;
  • Kim, Hyun-Soon (Dept. of Conversing Technology, Graduate School of Venture, Hoseo University) ;
  • Cheong, Chul (Dept. of Convergence Industry, Seoul Venture University) ;
  • Jang, Ki-Hyo (Dept. of Food & Nutrition, Kangwon National University) ;
  • Kang, Soon Ah (Dept. of Conversing Technology, Graduate School of Venture, Hoseo University)
  • 김미자 (성균관대학교 생명공학대학) ;
  • 김영기 (호서대학교 벤처전문대학원 융합공학과) ;
  • 김현순 (호서대학교 벤처전문대학원 융합공학과) ;
  • 정철 (서울벤처대학원대학교 융합산업학과) ;
  • 장기효 (강원대학교 식품영양학과) ;
  • 강순아 (호서대학교 벤처전문대학원 융합공학과)
  • Received : 2014.03.21
  • Accepted : 2014.06.12
  • Published : 2014.06.30
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Abstract

This study examined the antioxidant capacities of apple peel, grape peel, and sweet potato peel. The antioxidant activities were evaluated using total phenolic contents, total flavonoids contents, DPPH radical scavenging activity, ABTS radical cation scavenging activity, FRAP reducing power, and ORAC assay. The total phenolic (7.76 ${\mu}M$ quercetin equivalent/g peel) and total flavonoids (1.03 ${\mu}M$ quercetin equivalent/g peel) contents in apple peel were significantly higher than in grape peel and sweet potato peel (P<0.05). The scavenging activities of DPPH and ABTS radicals of a 70% ethanol extract of apple peel was 3.2-4.6 and 2.8-5.4 times high than those of grape and sweet potato peel, respectively. In addition, the FRAP reducing power and ORAC assay of 70% ethanol extraction from apple peel were significantly higher than those of the other samples. Therefore, apple peel can be used efficiently as a natural antioxidant.

본 연구에서는 천연 항산화제로써의 활용을 위해 부산물인 사과 껍질, 포도 껍질과 고구마 껍질의 에탄올 추출물의 총 폴리페놀, 총 플라보노이드, DPPH 라디칼 소거능, ABTS 양이온 소거능, FRAP 환원능과 ORAC 지수를 측정하였다. 결과적으로 총 폴리페놀과 총 플라보노이드의 함량은 사과 껍질 1g에 각각 7.76 ${\mu}M$ quercetin 당량과 1.03 ${\mu}M$ quercetin 당량으로 존재하여 포도 껍질과 고구마 껍질 보다 유의적으로 다량 함유되어 있는 것으로 관찰되었다. 또한 DPPH 라디칼 소거능은 사과껍질 1 g이 각각 포도 껍질보다는 3.2배, 고구마 껍질보다는 4.6배로 나타났고, ABTS 양이온 소거능 또한 사과껍질 1g이 각각 포도 껍질보다는 2.8배, 고구마 껍질보다는 5.4배로 강력하게 소거하는 것으로 나타났다. 뿐만 아니라, FRAP 환원능과 ORAC 지수 또한 사과 껍질이 포도 껍질이나 고구마 껍질보다 유의하게 우수한 것으로 나타났다. 이와 같은 결과로 사과껍질을 이용한 천연 항산화제로의 활용이 가능할 것으로 사료된다.

Keywords

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