한국자원식물학회지 (Korean Journal of Plant Resources)

  • 제23권2호
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  • Pages.123-130
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  • 2010
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  • 1226-3591(pISSN)
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  • 2287-8203(eISSN)
한국자원식물학회 (The Plant Resources Society of Korea)
권호 표지

가압열처리가 톱풀과 울릉미역취 어린잎의 항산화 활성에 미치는 영향

Influence of Applied Pressure and Heat Treatment on Antioxidant Activities of Young Leaves from Achillea alpina and Solidago virgaurea subsp. gigantea

  • 투고 : 2009.12.02
  • 심사 : 2010.03.31
  • 발행 : 2010.04.30
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초록

본 연구는 식용 및 약용으로 사용되는 울릉미역취와 톱풀 어린잎의 항산화활성 및 생리활성에 미치는 가압열처리의 영향을 알아보기 위하여 시행하였다. 4월 초순에 충북청원군 노지에서 어린잎을 채취한 직후 가압열처리($121^{\circ}C$, 1.2기압, 15분) 또는 무처리하여 동결건조한 후 분쇄하여 80% 에탄올 용매로 환류냉각추출한 추출물의 총 폴리페놀 및 플라보노이드의 함량, DPPH와 ABTS radical 소거능 및 ferrou ion chelating 정도를 측정 하였다. 톱풀과 울릉미역취의 추출수율은 가압열처리한 울릉미역취에서 가장 높았고(39.55%), 가압열처리한 톱풀 어린잎에서 가장 낮았다(28.15%). 톱풀과 울릉미역취 어린잎은 가압열처리 후 DPPH radical 소거활성이 현저히 감소하여, 각각 $1.506\;mg{\cdot}mL^{-1}$, $0.669\;mg{\cdot}mL^{-1}$씩 $RC_{50}$값이 증가하였다. ABTS radical 소거활성 또한 각각 $0.704\;mg{\cdot}mL^{-1}$, $0.421\;mg{\cdot}mL^{-1}$ 씩 $RC_{50}$값이 증가하였다. 반면 ferrous ion chelate 효과는 가압열처리에 의하여 향상되었으며, 톱풀의 어린잎에서 큰 폭으로 상승하였다. 또한 가압열처리는 총 폴리페놀과 플라보노이드 함량을 감소시켰는데, 특히 톱풀 어린잎에서 감소폭이 컸다. 따라서 본 실험에서는 가압열처리는 울릉미 역취와 톱풀 어린잎의 Ferrous ion clelate 효과를 향상시킬 수 있지만, DPPH 및 ABTS radical 소거능과 총 폴리페놀 및 플라보노이드의 함량을 감소시키는 것으로 나타났다. 또한, 톱풀의 어린잎은 울릉미역취에 비하여 열안정성이 낮아 열처리에 의한 활성의 변화가 큰 것으로 나타났다.

Present studies were conducted to investigate the effects of autoclaving on antioxidant activities of Achillea alpina and Solodago virgurea. At early April, young leaves of 2 species were collected, subjected to autoclaving ($121^{\circ}C$, 1.2 atmospheric pressure, 15 minutes), freezed-dried, grinded, and extracted with 80% ethanol. The same process was repeated with unautoclaved control. Total polyphenol and flavonoid contents, scavenging activities on DPPH and ABTS radicals and ferrous ion chelating effects were analyzed. Extraction yield of autoclaved S. virgurea was 39.55% and A. alpina 28.15%. In both species, autoclaving significantly reduced scavenging activities on DPPH and ABTS radicals. On the contrary, ferrous ion chelating effects increased after autoclaving, especially in young leaves of A. alpina. Autoclaving resulted in decrease of polyphenol and flavonoid contents, especially in the A. alpina. The present experiments demonstrated that autoclaving had negative effects on antioxidant activities of A. alpina and S. virgurea, except in ferrous ion chelating effects. Young leaves of former species were unstable to heat treatment, resulting in big lose of antioxidant activity.

키워드

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