Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Potential of Onion Peel Extract as a Functional Ingredient for Functional Foods

건강기능성식품 기능성원료로서 양파껍질추출물의 품질특성

  • Jeon, Seon-Young (Department of Food and Nutrition, Changwon National University) ;
  • Baek, Jeong-Hwa (Department of Food and Nutrition, Changwon National University) ;
  • Jeong, Eun-Jeong (Department of Food and Nutrition, Changwon National University) ;
  • Cha, Yong-Jun (Department of Food and Nutrition, Changwon National University)
  • 전선영 (창원대학교 식품영양학과) ;
  • 백정화 (창원대학교 식품영양학과) ;
  • 정은정 (창원대학교 식품영양학과) ;
  • 차용준 (창원대학교 식품영양학과)
  • Received : 2012.06.16
  • Accepted : 2012.08.24
  • Published : 2012.09.30
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Abstract

Onion peels is a natural source of high-value functional ingredients produced in the onion industry without suitable processing. The objective of this study was to evaluate characteristics of onion peel extract (OPE), including its biological activities, obtained from solvent extraction in 3 times pilot scales (Lot A, B, and C). Mineral analysis showed that K was present in the largest amount (13,767.56-15,506.78 ppm), followed by Na and Ca at 8,602.44-9,796.00 ppm and 4,255.78-4,903.33 ppm, respectively. The amounts of total phenol, total flavonoid, and quercetin in the OPE were in the ranges of 598.57~626.73, 211.73~233.64, and 93.78~107.29 mg/g, respectively. The biological activities such as antioxidant and effects of fibrinolysis increased in parallel with the concentration of OPE. The $IC_{50}$ value of DPPH radical scavenging activity was in the range of 517.58~557.32 ppm in the OPE. The $IC_{50}$ value for superoxide dismutase (SOD)-like activity was in the range of 11,900.91~12,690.35 ppm. A clear zone of OPE (20,000 ppm) in fibrinolysis test was three times higher than the plasmin as a reference. In conclusion, OPE could be used as a good source of antioxidants and fibrinolytic activities.

본 연구에서는 양파가공부산물인 양파껍질을 이용하여 기능성 식품소재로 개발하고자 양파껍질추출물을 제조하였으며 양파껍질추출물에 대한 생리적 기능성과 같은 품질 특성을 조사하였다. 양파껍질추출물에서는 K가 13,767.56~15,506.78 ppm으로 가장 많은 함량을 차지하였고 Na이 8,602.44~9,796.00 ppm, Ca은 4,255.78~4,903.33 ppm으로 세 번째로 많은 함량을 차지하였다. 그리고 Mg, P, Fe은 각각 1,433.11~1,561.22 ppm, 1,212.44~1,428.89 ppm, 760.67~858.89 ppm의 함량을 차지하였고 Zn은 34.11~66.89 ppm으로 미량 검출되었다. Total phenol 함량은 598.57~626.73 mg/g, total flavonoid 함량은 211.73~238.52 mg/g 범위로 quercetin 함량은 93.67~107.29 mg/g의 범위로 나타났다. 양파껍질추출물의 DPPH radical 소거활성은 100 ppm에서 16.45~17.92%, 200 ppm은 29.96~35.41%, 1,000 ppm은 81.05~84.60%의 소거활성을 보였고, SOD 유사활성은 10,000 ppm에서 31.92~39.29%, 20,000 ppm에서 85.85~91.58%의 활성을 나타내었다. 혈전용해능은 20,000 ppm 농도에서는 plasmin에 비해 약 3배 높은 활성을 가졌다. 따라서 양파껍질 추출물은 항산화력 및 항혈전효과능을 가진 기능성소재로서의 활용 가능성을 보였다.

Keywords

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