Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Control of Yam-Putrefactive Psychrotrophic Bacterium Using Clove Oil and Preparation of Functional Fresh-Cut

클로버 오일을 이용한 생마 저온부패균의 제어 및 기능성 생마 신선편이의 제조

  • Ryu, Hee-Young (Department of Food and Nutrition, Andong National University) ;
  • Park, Sang-Jo (Experiment Station of Bioresources, Gyeongbuk Agricultural Technology Administration) ;
  • Lee, Bong-Ho (Experiment Station of Bioresources, Gyeongbuk Agricultural Technology Administration) ;
  • Sohn, Ho-Yong (Department of Food and Nutrition, Andong National University)
  • 류희영 (안동대학교 식품영양학과) ;
  • 박상조 (경북농업기술원 생물자원연구소) ;
  • 이봉호 (경북농업기술원 생물자원연구소) ;
  • 손호용 (안동대학교 식품영양학과)
  • Published : 2007.03.28
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Abstract

Yam has been recognized as healthy food due to its various biological activities, such as anti-obesity, antimicrobial, anticancer and immune-stimulation activities. In this study, antibacterial activities of 800 more natural plant extracts against yam-putrefactive psychrotrophic bacterium, Pseudomonas rhodesiae YAM-12, were evaluated to select a natural preservative, which is useful to long-term storage of yam and fresh-cut production. Finally, the clove oil was selected, and applied for the production of yam fresh-cut. The 1% of clove oil treated fresh-cut showed minor color changes during 31 days storage at $4^{\circ}C$ and the microbial growth was not detected. When the artificially contaminated fresh cut by dipping with P. rhodesiae YAM-12 suspension for 3 min was treated 1% clove oil, the microbial growth was identified to $10^4$ CFU/g from $10^3$ CFU/g with minor color changes. Whereas, treatment of sterilized water, or 100 ppm NaOCl into artificially contaminated fresh cut showed severe putrefaction $(10^8\;CFU/g)$ and color changes. Considering the previous reports that clove oil has antimicrobial, antioxidation, and antithrombosis activity, the use of clove oil into the yam fresh cut will provide market safety and consumer acceptability by prevention of microbial putrefaction and its biological activity.

생마의 저장성 및 접근성 강화에 따른 소비증대 및 유통 안전성을 확보하기 위해, 생마 저온부패균을 효율적으로 제어하는 천연물을 선별하였다. 저온$(4^{\circ}C)$ 및 상온$(30^{\circ}C)$ 부패에 직접적으로 관여하는 Pseudomonas rhodesiae YAM-12 에 대해 다양한 자생 및 약용식물 추출물 800여종의 항균력을 평가하였으며, 그 결과 클로버 오일을 선정하였으며, 이를 이용한 생마 신선편이 개발 가능성을 검토하였다. 건전생마 신선편이에 1%클로버 오일을 3분간 침지하여, $4^{\circ}C$에서 31일간 저장한 경우, 색차의 변화는 거의 나타나지 않았으며, 미생물의 증식 또한 완전히 억제되었다. 한편 P. rhodesiae YAM-12를 인위적으로 오염시키고(초기농도 $10^3$ CFU/g), $4^{\circ}C$에서 14일간 저장한 경우에도, 1%클로버 오일의 처리는 색차 변화를 최소화하며, 미생물증식을 $10^4$ CFU/g로 억제하였다. 반면 무처리, 멸균수 및 NaOCl 처리의 경우에는 심각한 부패와 함께 색차변화로 상품성을 상실하였다. 클로버 오일의 항균, 항산화, 항혈전 활성과 향신료로 사용되어온 점을 고려할 때, 클로버 오일을 처리한 생마 신선편이는 별도의 화학 방부제 처리 없이 생마의 유통안전성 향상 및 부패억제, 기능성 및 향미부여에 유용하게 사용될 수 있을 것으로 판단된다.

Keywords

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