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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Combined Treatment of Chlorine Dioxide Gas, Mild Heat, and Fumaric Acid on Inactivation of Listeria monocytogenes and Quality of Citrus unshiu Marc. during Storage

이산화염소 가스 훈증, 중온 열수 및 푸마르산 병합처리가 감귤의 미생물학적 안전성 및 저장 중 품질에 미치는 영향

  • Kim, Hyun Gyu (Department of Food Science and Technology, Chungnam National University) ;
  • Min, Sea Cheol (Department of Food Science and Technology, Seoul Women's University) ;
  • Oh, Deog Hwan (Department of Food Science and Biotechnology, Kangwon National University) ;
  • Koo, Ja Jun (Eco Biotech) ;
  • Song, Kyung Bin (Department of Food Science and Technology, Chungnam National University)
  • Received : 2016.04.11
  • Accepted : 2016.05.24
  • Published : 2016.08.31
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Abstract

Combined treatment of chlorine dioxide ($ClO_2$) gas, mild heat, and fumaric acid was performed to reduce microbial growth and maintain quality of Citrus unshiu during storage at $4^{\circ}C$. Citrus unshiu fruits were treated with $ClO_2$ gas (15 or 30 ppmv), mild heat (40, 50, or $60^{\circ}C$), and fumaric acid (0.1, 0.3, or 0.5%). Combined treatment of 15 or 30 ppmv $ClO_2$ gas, $50^{\circ}C$ mild heat, and 0.5% fumaric acid reduced populations of inoculated Listeria monocytogenes by 3.5~3.7 log CFU/g. In addition, combined treatment decreased populations of yeast and molds in Citrus unshiu by 2.54 log CFU/g after 30-day storage at $4^{\circ}C$. Combined treatment also reduced the decay rate by 48% after 30 days of storage compared with the control. Total solid content, titratable acidity, and color values were not significantly affected by the combined treatment. Therefore, combined treatment of $ClO_2$ gas, mild heat, and fumaric acid can be a useful hurdle technology to improve microbial safety and quality of Citrus unshiu during storage.

감귤의 저장 중 미생물학적 안전성 확보 및 품질 향상을 위해 0.5% 푸마르산과 $50^{\circ}C$ 열수 세척처리 후 15, 30 ppmv 이산화염소 가스 훈증 처리하여 $4{\pm}1^{\circ}C$에서 30일간 저장하였다. 푸마르산, 열수 세척처리, 15와 30 ppmv 병합처리 시 접종된 Listeria monocytogenes를 3.5~3.7 log CFU/g 감소시켰다. 또한, 감귤의 병합처리 후 30 ppmv 병합처리구에서 저장 30일 후에 효모 및 곰팡이 수에 있어서 2.54 log CFU/g의 감소 효과를 나타냈고, 대조구와 비교하여 부패율을 48% 낮추는 효과를 보였다. 저장 중 당도, 산도는 대조구와 비교하여 유의적인 차이를 나타내지 않았고, 병합처리는 감귤 시료의 표면 색도에 부정적인 영향을 끼치지 않았다. 따라서 본 연구 결과 이산화염소 가스, 중온 열수 세척, 푸마르산 병합처리는 감귤 시료의 품질에 영향을 끼치지 않으면서 미생물학적 안전성 및 품질을 향상할 수 있는 효과적인 허들기술이라고 판단된다.

Keywords

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