Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Antimicrobial Activity of the Solvent Extracts from of Chestnut

밤 부위별 추출물의 항균활성

  • Kim Yong Doo (Department of Food Science and Technology, Sunchon National University) ;
  • Cho Duk Boung (Department of Food Technology, Gwangju Health college) ;
  • Kim Kyung Je (Department of Food Science and Technology, Sunchon National University) ;
  • Kim Ki Man (Department of Food Science and Technology, Sunchon National University) ;
  • Hur Chang Ki (Department of Food Science and Technology, Sunchon National University) ;
  • Cho In Kyung (Department of Food Science and Technology, Nambu University)
  • Published : 2005.06.01
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Abstract

To develop natural food preservatives, ethanol and water extracts were prepared from chestnut. Antimicrobial activities were examined about 10 microoganisms which were food-borne pathogens and food-poisoning microoganisms, food-related bacteria and yeasts. Ethanol extract exhibited the antimicrobial activity for the microoganisms tested, except lactic acid bacteria and yeast Especially, minimum inhibitory concentrations(MIC) of the ethanol extracts were determined as 0.5 mg/mL in chestnut leaf and 1.0 mg/mL in chestnut balk against bacteria. Antimicrobial activity of the ethanol extracts was not destroyed by the heating at $121^{\circ}C$ for 15 min, and not affected by pH $3{\sim}9$. The ethanol, extract of chestnut exhibiting the high antimicrobial activities was fractionated in the other of diethylether and butanol fractions. The highest antimicrobial activity against bacteria was shown in the ethanol fraction.

새로운 식품개발 및 천연 보존료 개발의 일환으로 물, 에탄올, 에칠아세테이트로 추출한 항균활성 물질을 몇 종의 병원균과 식중독균 식품과 관련이 있는 세균, 젖산균 및 효모 등 10개 균주에 대하여 항균활성 검색을 하였으며, 항균력이 강한 밤잎과 수피 에탄올 추출물을 용매 계통분획하여 각 분획별 항균활성을 조사하였다. 또한 에탄올 추출물의 최소저해농도, 추출물에 함유된 항균성물질의 열안정성 pH 등을 조사하였다. 밤 잎과 수피의 항균활성은 에탄올 추출물과 물 추출물이 10균주 중 세균에 대하여 항균활성이 강하였으나, 젖산균 및 효모에 대해서는 항균활성이 나타나지 않았다. 밤잎과 수피를 핵산, 디에칠에테르, 에칠아세테이트 및 물로 용매계통분획하여 얻은 각 분획물의 항균활성은 에칠아세테이트와 물층에서 강한 항균활성을 보였고 균주별로 일반세균은 항균활성이 나타났으며, 효모와 젖산균에서는 항균활성이 나타나지 않았다. 최소저해농도는 밤나무 잎 0.5 mg/mL 이었고, 수피 추출물에서는 1 mg/mL이었다. 밤 잎과 수피의 에탄올 추출물에 함유되어 있는 항균활성 물질은 $121^{\circ}C$에서 15분간 가열한 후에도 그 활성이 유지된 것으로 보아 열에 안정하였으며, pH의 변화에도 항균활성의 변화가 거의 없는 것으로 나타났다.

Keywords

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