Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Biological Activities of Solvent Fractions of Capsicum annuum Leaves

고추잎 용매 분획물의 생리활성

  • 김지혜 (경상대학교 대학원 응용생명과학부ㆍ농업생명과학연구원) ;
  • 정창호 (경상대학교 대학원 응용생명과학부ㆍ농업생명과학연구원) ;
  • 심기환 (경상대학교 대학원 응용생명과학부ㆍ농업생명과학연구원)
  • Published : 2003.12.01
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Abstract

Biological activities of solvent fractions obtained from Cnsicum annuum leaves, being used in material of functional food, were examined by the methods of DPPH scavenging activity, reducing power, nitrite scavenging activity, antimicrobial activity and inhibitory effect on tyrosinase activity. The highest yield was obtained from water fraction, where as the lowest yield was obtained from ethyl acetate traction, 16.9% and 0.6%, respectively. Hydrogen donating activity of Capsicum annuum leaves in increased with increasing amount of extract. Reducing power of the ethyl acetate fraction is increased as the amount of extract is increased. Even in the presence of 900 $\mu\textrm{g}$ of ethyl acetate fraction, reducing power was significantly higher than it was fer the control in which there was no extract. Among the various solvent fractions, ethyl acetate fraction showed the strongest scavenging effect on hydrogen peroxide. Nitrite scavenging effects of all concentrations diminished at higher pH, while in the case of pH 1.2, it showed a nitrite scavenging effect of more than 90% at concentration above of ethyl acetate fraction 500 $\mu\textrm{g}$. Among the various solvent fractions from methanol extract of Capsicum annuum leaves, ethyl acetate and butanol fraction showed the strongest antimicrobial activity. Antimicrobial activity of ethyl acetate fraction was 20 mm against Bacillus cereus, 18 mm against Staphylococcus aureus and 17 mm against Streptococcus mutans. Ethyl acetate fraction showed the strongest of inhibitory activity of tyrosinase.

고추잎을 기능성식품의 재료로 이용하기 위한 방안을 모색하기 위하여 각 용매 분획물을 이용하여 생리활성 즉, 전자공여효과, 환원력, 아질산염 소거효과, 항균활성 및 tyrosinase 저해활성에 대하여 조사하였다 추출수율을 조사한 결과 물 분획층에서 16.9%로 가장 높은 추출수율을 나타낸 반면 에틸아세테이트 분획층 0.6%로 가장 낮은 추출수율을 나타내었다. 전자공여효과는 전반적으로 농도가 상승함에 따라 증가하였으며, 환원력도 분획물의 농도가 높아짐에 따라 점차적으로 증가하는 것을 볼 수 있었는데, 특히 ethyl acetate 분획물 0∼600 $\mu\textrm{g}$을 첨가하였을 때는 환원력의 증가가 크게 나타나지 않았으나, 900 $\mu\textrm{g}$이상 첨가구에서는 추출물을 첨가하지 않은 대조구와 비교하여 환원력이 매우 증가하는 것으로 나타났다. 고추잎 분획물을 농도별로 첨가하여 아질산염 소거효과를 측정한 결과 pH가 증가함에 따라 아질산염 소거효과가 감소하는 경향을 나타내었으며, ethyl acetate fraction에서 가장 높은 소거효과를 나타내어 500 $\mu\textrm{g}$을 첨가하였을 때 90%이상의 아질산염 소거효과를 나타내었으며, 농도가 증가함에 따라 아질산염 소거효과도 점차적으로 증가하는 경향을 나타내었다. 고추잎 각 분획물의 항균활성은 ethyl acetate 및 butanol 분획물에서 높게 나타났으며, 각 균주에 대한 clear zone의 직경을 확인한 결과 gram 양성균인 Bacillus cereus에서 20 mm로 항균활성이 가장 높게 나타났고, Staphylococcus aureus 18 mm, Streptecoccus mutans 17 mm순으로 주로 gram 양성균에서 높은 활성을 나타내었다. Tyrosinase 저해활성은 에틸 아세테이트 분획물에서 가장 높은 저해 활성을 나타내었다.

Keywords

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