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 Ultraviolet-C with Aqueous Chlorine Dioxide or Fumaric Acid on the Postharvest Quality of Strawberry Fruit "Flamengo" during Storage

"플라멩고" 딸기의 수확 후 Ultraviolet-C와 이산화염소수 또는 푸마르산 병합 처리에 따른 저장 중 품질에 미치는 영향

  • Kim, Ju-Yeon (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Kim, Hyun-Jin (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Lim, Geum-Ok (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Jang, Sung-Ae (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)
  • 김주연 (충남대학교 농업생명과학대학 식품공학과) ;
  • 김현진 (충남대학교 농업생명과학대학 식품공학과) ;
  • 임금옥 (충남대학교 농업생명과학대학 식품공학과) ;
  • 장성애 (충남대학교 농업생명과학대학 식품공학과) ;
  • 송경빈 (충남대학교 농업생명과학대학 식품공학과)
  • Published : 2010.01.30
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Abstract

The combined effect of 50 ppm aqueous chlorine dioxide ($ClO_2$) or 0.5% fumaric acid with $5 kJ/m^2$ ultraviolet-C (UV-C) on the postharvest quality of "Flamengo" strawberries was examined. After non-thermal treatment, the samples were stored at $4\pm1^{\circ}C$ for 12 days. The combined treatment of fumaric acid/UV-C reduced the initial populations of total aerobic bacteria and yeast and molds in the strawberries by 2.09 and 2.02 log CFU/g, respectively, compared to those of the control. In addition, after 12 days of storage the yeast and molds population in the combined treatment was 1.72 log CFU/g, compared to 5.10 log CFU/g for the control, resulting in a significant decrease of 3.38 log CFU/g. Postharvest treatments used in this study caused negligible changes in the color of the strawberries. Sensory evaluation results indicated that the combined postharvest treatment provided better sensory scores than did the control. In particular, the overall acceptability scores were higher for the combined treatment groups after 5 days of storage. These results suggest that combined treatment of either 50 ppm $ClO_2$ or 0.5% fumaric acid with $5 kJ/m^2$ UV-C can be useful for maintaining the quality of strawberries.

수출용 딸기 "플라멩고" 품종의 수확 후 미생물학적 안전성 확보와 저장성 증대를 위해, 50 ppm 이산화염소수 또는 0.5% 푸마르산 용액과 5 $kJ/m^2$ UV-C 조사 병합처리에 따른 저장 중 미생물 수 감소 및 품질 변화에 미치는 영향을 조사하였다. 비가열 처리 후, 딸기는 $4\pm1^{\circ}C$에서 12일 동안 저장하면서 실험을 수행하였다. 딸기의 초기 미생물 수에 있어서 대조구와 비교하여, 푸마르산-UV-C 병합 처리구에서 총 호기성 세균과 효모 및 곰팡이를 각각 2.09, 2.02 log CFU/g 감소시켰다. 또한, 저장 12일에 푸마르산과 UV-C 병합 처리구의 효모 및 곰팡이 수는 1.72 log CFU/g으로 대조구의 5.10 log CFU/g과 비교하여 3.38 log CFU/g의 유의적인 차이로 가장 큰 감균 효과를 나타냈다. 비가열 처리구는 대조구와 비교하여 딸기의 저장 중 Hunter 색도 값에 부정적인 영향을 끼치지 않았다. 관능검사에 있어서는 병합 처리구가 대조구와 다른 처리구보다 높은 점수를 얻어 저장 중 관능적 품질유지에도 효과가 있는 것으로 나타났다. 특히, 딸기의 종합적 기호도는 저장 5일부터 두 병합 처리구가 높은 점수를 나타냈다. 따라서 본 연구결과, 50 ppm 이산화염소 또는 0.5% 푸마르산과 UV-C 조사의 병합처리가 수확 후 딸기의 저장 유통 중에 오염될 수 있는 위해미생물의 감소와 외관적 품질유지에 효과적인 살균 처리기술이라고 판단된다.

Keywords

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