Antioxidant Activity of Different Lipid Extracts from Mackerel Viscera

고등어 내장으로부터 추출한 지질성분의 항산화효과

  • 변대석 (부산수산대학교 식품영양학과) ;
  • 정용실 (부산수산대학교 식품영양학과) ;
  • 홍정화 (인제대학교 식품영양학과)
  • Published : 1995.02.01

Abstract

To utilize the mackerel viscera effectively, antioxidant substances were extracted and the effects on the oxidation were evaluated. Total lipid(TL) extracted from mackerel viscera were fractionated into hexane extracts, tetracarbon chloride($CCl_4$)-methanol(1 : 1, 1 : 3, 1 : 9, v/v) extracts, phospholipid(PL), phosphatidylcholine(PC), and PC free fracitons(PCF). Inhibition of fish oil oxidation was investigated using these fractions. Hexane fraction showed lower antioxidant activity compared to the TL or $CCl_4-methanol$ fractions(C-M) ; in addition, antioxidant activities increased as polarity of C-M increased. Significant antioxidant activities were observed with PL, PC, and PCF ; among them, PC was the most effective. To determine the antioxidant activity of PC, effects of natural or synthetic antioxidant were compared. Addition of PC to fish oil proved to enhance antioxidant activity the antioxidant activity of phospholipids was derived mainly from PC.

미이용자원의 효율적인 이용을 위해서 고등어 내장으로부터 항산화물질을 추출하여 그 효과를 알아보고자 본 실험을 행하였다. 내장으로 부터 총지질을 추출하여 다시 헥산 추출물, 사염화탄소-메탄올 추출물(1 : 1, 1 : 3, 1 : 9, v/v), 인지질, 포스파티딜콜린(PC), PC를 제외한 나머지 인지질획분(PCF)로 추출하여 $40^{\circ}C$ 항온기에서 10일간 산화억제실험을 하였다. 그 결과 헥산 추출물은 총지질이나 사염화탄소-메탄올 보다 산화억제 효과가 낮았고 사염화탄소-메탄올(1 : 1, 1 : 3, 1 : 9, v/v) 추출물은 극성이 높을수록 효과가 컸다. 극성지질인 인지질(PL)과 인지질을 구성하는 포스파티딜콜린(PC)과 그 나머지 획분(PCF=PC free PL)도 모두 현저한 산화억제 효과를 나타내었으며 그 중에서도 PC가 가장 효과적인 것을 알 수 있었다. PC의 항산화 효과를 알아보기 위해 천연 및 합성산화제와의 효과를 비교한 결과 PC첨가군이 다른 항산화제 보다 2~3배 산화억제력이 높게 나타났다. 이상의 결과를 종합해보면 인지질의 항산화작용을 인정할 수 있으며 그 주체는 PC임을 알 수 있다. 수산폐기물로 부터 항산화물질의 이용이라는 대단히 긍정적인 결과와 함께 어유의 산화안정효과에 대단히 큰 영향을 미치리라고 예상된다.

Keywords

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