Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antimicrobial Activities of Scutellaria baicalensis Georgi Against Various Pathogens and Spoilage Bacteria Isolated from Tofu

두부 부패 미생물과 병원성 미생물에 대한 황금의 항균효과

  • Woo, In-Taeck (Faculty of Food Technology and Service, Catholic University of Daegu) ;
  • Park, Kyung-Nam (Faculty of Food Technology and Service, Catholic University of Daegu) ;
  • Lee, Shin-Ho (Faculty of Food Technology and Service, Catholic University of Daegu)
  • 우인택 (대구가톨릭대학교 식품외식산업학부) ;
  • 박경남 (대구가톨릭대학교 식품외식산업학부) ;
  • 이신호 (대구가톨릭대학교 식품외식산업학부)
  • Published : 2007.04.30
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Abstract

Antibacterial activities of Scutellaria baicalensis Georgi (SBG) extract were examined against spoilage bacteria isolated from commercial tofu and various pathogens such as Listeria monocytogenes ATCC 19115, Pseudomonas fluorescens ATCC 21541. Staphylococcus aureus ATCC 29737, Salmonella Typhimurium ATCC 11806, Vibrio parahaemolyticus ATCC 17802, and Aeromonas hydrophila KCTC 2358. Four kinds of spore forming organisms were isolated from commercial tofu and identified as Bacillus sp. KN-4, Bacillus sp. KN-6, Bacillus sp. KN-10 and Bacillus sp. KN-20 using API CHB kit. The SBG extract showed high antibacterial activities and significantly inhibited the growth of the isolated spoilage bacteria and pathogens. The inhibitory effects against the organisms increased as the concentration of the SBG extract increased. The antimicrobial activities of the SBG extract were maintained markedly after heat treatments $(80^{\circ}C/30\;min,\;100^{\circ}C/30\;min\;and\;121^{\circ}C/15min)$. The minimum inhibitory concentrations (MIC) of the SBG extract against the organisms ranged from 1,000 ppm to 5,000 ppm.

두부에서 분리한 부패 미생물 16균주와 6종류의 병원성 미생물에 대한 황금 에탄을 추출물의 항균활성을 조사한 결과 분리 13균주와 병원성 미생물에 대해서 항균활성을 나타내었으며, 두부 부패 미생물인 KN-4, KN-6, KN-10, KN-20에 대하여 황금 에탄을 추출물 0.05% 이상의 농도에서 성장억제 현상을 나타내었다 선발균주를 동정한 결과, KN-4, KN-6, KN-10과 KN-20 공히 Bacillus sp.로 동정되었다. 황금 에탄을 추출물은 Listeria monocytogenes ATCC 19115, Pseudomonas fluorescens ATCC 21541, Staphylococcus aureus ATCC 29273, Salmonella Typhimurium ATCC 21541, Vibrio parahaemolyticus ATCC 17802, Aeromonas hydrophila KCTC 2358에 대해 항균활성을 나타내었으며, 0.5% 이상 농도에서 성장이 억제되었다 황금에탄올 추출물은 $80^{\circ}C$에서 30min, $100^{\circ}C$에서 30 min, $121^{\circ}C$에서 15 min 열처리에 의해, 공시균주에 대한 항균활성이 다소 감소하는 현상을 나타내었으나 열처리 후에도 두부 부패미생물과 공시 병원성 미생물에 대한 항균활성은 뚜렷하게 유지되었다. 두부 부패 미생물과 병원성 미생물에 대한 황금 에탄을 추출물의 최소저해농도는 각각 0.1%와 0.5%이었다.

Keywords

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