Antimicrobial Activity of Extracted by Supercritical Fluid from Origanum vulgare, Cinnamomum cassia, Chamaecyparis obtusa and Scutellariae baicalensis

오레가노, 육계, 편백 및 황금의 초임계 유체 추출물의 항균 활성

  • 김우진 ((주)케이엠에이치 생명공학연구소) ;
  • 조준영 ((주)케이엠에이치 생명공학연구소) ;
  • 최창숙 ((주)케이엠에이치 생명공학연구소) ;
  • 윤기선 ((주)케이엠에이치 생명공학연구소) ;
  • 이원규 (아주대학교 분자과학기술학과) ;
  • 유연우 (아주대학교 분자과학기술학과)
  • Published : 2008.04.29

Abstract

The variety of functional plants has an attention for new natural food preservation and natural antiseptic development. The extracts from functional plants with various methods (ethanol extraction, hot water extraction and supercritical fluid extraction) tested antimicrobial activity against 10 strains including the pathogenic and food poisoning bacteria, the yeast and fungi. The antimicrobial activities of supercritical fluid extracts were shown higher than ethanol extract and hot water extract when tested with disc-diffusion method and minimum inhibitory concentration (MIC). Antimicrobial activity of supercritical fluid extract was two times higher than ethanol extract in Cinnaonomum cassia. In addition, the supercritical fluid extractions of Chamaecyparis obtuas and the C. cassia showed the higher yield than Origanum vulgare and Scutellariae baicalensis. The supercritical fluid extract of C. cassia showed an antimicrobial activity against all strains tested. The supercritical fluid extract of S. baicalensis showed strong antimicrobial activity on Listeria monocytogenes. Supercritical fluid extraction of O. vulgare and C. obtuas showed strong antimicrobial activity on Salmonella typhimuriium. In MIC test, C. obtuas was shown the best natural material for the preparation of natural antimicrobial agent by supercritical fluid extraction. In conclusion, these results suggest that supercritical fluid extraction technique was effective to obtain functional ingredient with higher antimicrobial activity in the development of new antimicrobial reagent from natural materials.

다양한 기능성을 갖는 식물체를 대상으로 새로운 천연 식품보존제 및 방부제 개발의 일환으로 다양한 방법으로 추출한 항균환성 물질을 몇 종의 병원성균과 식중독균, 효모, 곰팡이 등 10개 균주에 대하여 항균활성 검색을 하였다. 각 추출방법에 따른 추출 수율을 보면 편백과 육계 초임계 추출물의 수율이 가장 높았지만, 오레가노와 황금의 경우에는 초임계 추출물의 수율이 가장 낮았다. 그러나 항균활성 실험에서 disc-diffusion method 및 최소억제농도 (MIC) 실험 결과 유기용매 추출 및 열수 추출보다 초임계 추출의 경우가 항균활성이 모든 시료에서 높은 것으로 나타났다. Disc-diffusion method에서 육계 초임계 추출물의 경우 에탄올 추출물보다 항균활성이 두 배정도 높게 나타났고, 10개 균주에 대해 모두 항균활성을 나타냈다. 황금 초임계 추출물은 L. monocytogenes에 강한 항균활성을 보였고, 오레가노와 편백의 초임계 추출물은 S. typhimurium에 강한 항균활성을 보였다. 최소억제농도 (MIC)에서는 편백 초임계 추출물이 다른 초임계 추출물에 비해 강한 항균활성을 보였으며, 그 다음으로 육계, 황금, 오레가노 초임계 추출물의 순으로 항균활성을 나타내었다. 따라서 천연물을 이용한 항균제 개발에 있어 초임계 추출방법이 항균력이 높은 기능성 성분을 추출해 내는데 가장 효과적인 추출방법인 것으로 판단된다.

Keywords

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