Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Cold Pasteurization of Frozen Crushed Garlics using Electron Beam Irradiation and the Stability of Bioactive Components

냉동다진마늘에 대한 전자선 살균 효과와 생리활성 성분의 안정성

  • Lee, Hyun-Gyu (School of Food Science and Biotechnology, and Food Bio-industry Research Institute, Kyungpook National University) ;
  • Jo, Yunhee (School of Food Science and Biotechnology, and Food Bio-industry Research Institute, Kyungpook National University) ;
  • Kwon, Joong-Ho (School of Food Science and Biotechnology, and Food Bio-industry Research Institute, Kyungpook National University)
  • 이현규 (경북대학교 식품공학부.식품생물산업연구소) ;
  • 조윤희 (경북대학교 식품공학부.식품생물산업연구소) ;
  • 권중호 (경북대학교 식품공학부.식품생물산업연구소)
  • Received : 2015.12.21
  • Accepted : 2016.01.20
  • Published : 2016.02.29
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Abstract

Recently, the market for ready-to-use vegetables has increased largely due to consumer demands, which led to the production of minimally-processed frozen crushed garlic products. This study was designed to determine the effect of electron beam irradiation (0-7 kGy) on microbial decontamination, bioactive compounds, and antimicrobial activities of frozen crushed garlic obtained from Korea and China. The microbial counts (total bacteria, yeasts & molds) were reduced from log 3-4 CFU/g to non-detectable levels as a result of irradiation at 4 kGy. Irradiation treatment at 4 kGy did not affect the amount of alliin, allicin, total pyruvate, and total thiosulfinate of crushed garlic, however, this dose induced insignificant changes in antibacterial activities against pathogenic bacteria including Bacillus subtilis, Staphylococcus aureus, Salmonella enteritidis, Vibrio parahaemolyticus, and Yersinia enterocolitica. Therefore, electron beam irradiation less than 4 kGy can be considered suitable to improve the microbial decontamination without altering the biological activity of frozen garlics.

시판 냉동다진마늘에 대한 전자선 살균 효과를 알아보고, 유효성분 및 항균활성에 대한 영향을 확인하기 위해 국산 및 중국산 시료에 대해 실험하였다. 냉동다진마늘은 4 kGy 이상의 조사처리에서 ND 이하의 미생물 수준을 나타내어 살균 효과가 있음을 확인하였다. 시료의 수분은 국산에 비해 중국산에서 유의적으로 높은 함량이었으나, 조사에 따른 차이는 없었고, 전반적 색차는 4 kGy 이상의 선량에서 유의적으로 증가하였다. 마늘의 total thiosulfinate 및 total pyruvate 함량은 살균을 목적으로 한 7 kGy 범위의 전자선 조사에서 비교적 안정하였다. 마늘의 alliin 및 allicin 함량은 4 kGy 범위의 전자선 조사에 영향을 받지 않으나, 7 kGy 선량에서는 특히 중국산 시료에서 유의적으로 감소하였다. 마늘의 에탄올 추출액은 Y. enterocolitica 균주를 포함한 7종의 병원성균에 대해 우수한 항균효과를 나타내었고, 조사선량의 증가에 따라 clear zone이 감소하는 경향을 나타내었다. 이상의 결과, 냉동다진마늘에 대한 4 kGy 범위의 전자선 조사는 생리활성 성분의 변화 없이 미생물학적 품질을 개선시킬 수 있는 적정 선량으로 확인되었다.

Keywords

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