Characterization of an Antioxidant from Sporophyll of Undaria pinnatifida

미역 포자엽에서 분리한 항산화 물질의 특성

  • Yang, Ji-Yeong (Division of Food Science & Biotechnology, Pukyong National University) ;
  • Yu, Mi-Yeong (JChung-Ho Sea Food Co., Ltd.) ;
  • Kim, Sang-Gwon (Division of Food Science & Biotechnology, Pukyong National University)
  • 양지영 (부경대학교 식품생명공학부, 수산식품연구소) ;
  • 유미영 ((주)청호씨푸드) ;
  • 김상권 (부경대학교 식품생명공학부, 수산식품연구소)
  • Published : 2004.12.01

Abstract

Hot water soluble extract from sporophyll of Undaria pinnatifida was examined for antioxidant activity using l,l-diphenyl-picrylhydrazyl (DPPH) and lipid peroxidation assay. The $IC_{50}$ value (7.6 mg/ml) of hot water extract from sporophyll of U. pinnatifida was more higher than ascorbic acid (0.025 mg/ml) and BHT (0.25 mg/ml). The hot water extract from sporoof U. pinnatifida was stable from pH 2 to pH 7 but decreased at alkali pH. The heat stability of hot water extract from sporophyll of U. pinnatifida was stable from $0^{\circ}C$ to $120^{\circ}C$. An effect on an antioxidant activity of hot water extract from sporophyll of U. pinnatifida was studied with various metal ions and EDTA. Antioxiactvity of hot water extract from sporophyll of U. pinnatifida was inhibited by EDTA but increased by adding $Cu^{2+}$, $Co^{2+}$ and $Mn^{2+}$, respectively.

미역포자엽으로부터 열수추출을 통해 항산화물질을 조제하고 항산화와 관련된 특성을 조사하였다. 미역포자엽으로부터 조제한 열수추출물은 시료 양에 따라 2차곡선의 항산화능을 보여주었으며 $IC_{50}$ 의 값은 1.54 mg을 나타내었다. 이는 ascorbic acid 0.005 mg과 BHT 0.05 mg 에 비해서는 높은 값을 나타내었다. 미역포자엽으로부터 조제한 열수추출물의 pH안정성은 산성과 중성에서는 안정하였으나 알카리영역에서는 급격히 감소하였다. 또한 열안정성은 0도에서 120도의 모든 범위에서 안정한 값을 유지하였다. 미역포자엽으로부터 조제한 열수추출물의 금속이온과 EDTA가 항산화능에 미치는 영향을 조사한 결과 $Cu^{2+}$, $Co^{2+}$, $Mn^{2+}$ 등의 금속이온이 활성이 증가하는 결과를 보여주었으며 EDTA는 저해하는 결과를 보여주었다.

Keywords

References

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