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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Combined Treatment of Aqueous Chlorine Dioxide with Ultraviolet-C on the Quality of Red Chicory and Pak Choi during Storage

이산화염소수와 Ultraviolet-C 병합 처리에 따른 레드 치커리와 청경채의 저장 중 품질에 미치는 영향

  • Kim, Hyun-Jin (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Song, Hyeon-Jeong (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Song, Kyung-Bin (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University)
  • 김현진 (충남대학교 농업생명과학대학 식품공학과) ;
  • 송현정 (충남대학교 농업생명과학대학 식품공학과) ;
  • 송경빈 (충남대학교 농업생명과학대학 식품공학과)
  • Received : 2010.11.15
  • Accepted : 2010.11.30
  • Published : 2011.02.28
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Abstract

The combined effects of 10 kJ/$m^2$ ultraviolet-C (UV-C) with 50 ppm aqueous chlorine dioxide ($ClO_2$) on the qualities of red chicory and pak choi were examined. After the treatment, the samples were stored at $4{\pm}1^{\circ}C$ for 7 days. The combined treatment of $ClO_2$/UV-C reduced the initial populations of total aerobic bacteria in the red chicory and pak choi by 2.64 and 2.55 log CFU/g, respectively, compared to those of the control. Also, the populations of yeast and molds in the red chicory and pak choi by combined treatment were reduced by 2.41 and 2.00 log CFU/g, respectively. In addition, after 7 days of storage the total aerobic bacteria populations in the red chicory and pak choi were reduced to 3.71 and 3.93 log CFU/g, compared to 6.31 and 6.62 log CFU/g for the control, resulting in a significant decrease. Hunter L, a, and b values of red chicory and pak choi were not significantly different among the treatments. Non-thermal treatment caused a negligible change in sensory evaluation. These results suggest that the combined treatment of 50 ppm $ClO_2$ with 10 kJ/$m^2$ UV-C can be useful for maintaining the qualities of red chicory and pak choi.

신선 채소 중 레드 치커리와 청경채의 미생물학적 안전성 확보를 위해 50 ppm 이산화염소수와 10 kJ/$m^2$ UV-C 조사 병합 처리에 따른 저장 중 미생물 수 및 품질 변화에 미치는 영향을 처리 후 $4{\pm}1^{\circ}C$에서 7일 동안 저장하면서 실험하였다. 레드 치커리와 청경채의 총 호기성 세균 수는 대조구와 비교 시, 이산화염소수와 UV-C 병합 처리구에서 2.64, 2.55 log CFU/g 감소시켰으며, 효모 및 곰팡이는 2.41, 2.00 log CFU/g 감소시켰다. 또한, 레드 치커리와 청경채의 저장 7일 후, 이산화염소수와 UV-C 병합 처리구의 총 호기성 세균수는 3.71, 3.93 log CFU/g으로 대조구와 비교할 때, 2.60, 2.69 log CFU/g의 유의적인(p<0.05) 차이를 나타냈다. 병합 처리는 대조구와 비교하여 레드 치커리와 청경채의 저장 중 Hunter 색도 값에 부정적인 영향을 끼치지 않았다. 관능검사에 있어서도 병합 처리구가 대조구보다 저장 중 관능적 품질 유지에도 효과가 있는 것으로 나타났다. 따라서 본 연구결과, 50 ppm 이산화염소수와 10 kJ/$m^2$ UV-C 조사의 병합 처리가 레드 치커리와 청경채의 저장 중에 오염될 수 있는 위해미생물의 감소와 외관적 품질유지에 효과적인 처리 기술이라고 판단된다.

Keywords

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