Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effects of Washing-water Temperature and Packaging Type on the Quality of Fresh-cut Crown Daisies

세척 쑥갓의 선도 유지에 미치는 세척수 온도와 포장 형태의 영향

  • Chang, Min-Sun (Postharvest Technology Research Group, Korea Food Research Institute) ;
  • Kim, Byeong-Sam (Postharvest Technology Research Group, Korea Food Research Institute) ;
  • Kim, Gun-Hee (Department of Food Nutrition, Duksung Women's University)
  • 장민선 (한국식품연구원 유통연구단) ;
  • 김병삼 (한국식품연구원 유통연구단) ;
  • 김건희 (덕성여자대학교 식품영양학과)
  • Published : 2008.04.30
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Abstract

The effects of hydrocooling and packaging type on the quality attributes of fresh-cut crown daisies (Chrysanthemum coronarium var. spatiosum) were investigated by examining weight loss, respiration, vitamin C content, total chlorophyll content, microbial load, and sensory properties during storage at 4 and 10$^{\circ}C$. Fresh crown daisies were trimmed and washed with cold water (1 and 5$^{\circ}C$) as well as tap water (10$^{\circ}C$) 3 times each for 30 sec. They were then packaged in PP (polypropylene) film bags or PETE (polyethylene terephthalate) trays, and stored for 9 days at 4 and 10$^{\circ}C$, respectively. In general, weight loss was reduced as a result of the washing and packaging. The respiration rate increased slowly during storage at 4$^{\circ}C$, and the vitamin C and total chlorophyll contents of the crown daisies packaged in PETE trays decreased gradually during storage. Finally, the treatments consisting of hydrocooling and then packaging in PETE trays resulted in approximately 1-2 log CFU/g reductions in microbial load.

쑥갓을 1 및 5$^{\circ}C$의 냉각수와 10$^{\circ}C$의 지하수를 이용하여 세척한 후 PP film bag과 PETE tray에 포장하여 4 및 10$^{\circ}C$에서 9일간 저장하며 중량감모, 호흡율, 표면색, 비타민 C 함량, 미생물분석 및 관능적 품질변화를 조사하였다. 4$^{\circ}C$에서 저장한 경우 저장 3일째까지 1 및 5$^{\circ}C$의 냉각수로 세척한 쑥갓은 감모의 변화가 적었으며 호흡속도는 1 및 5$^{\circ}C$ 냉수 세척 처리하여 PETE tray로 포장하여 4$^{\circ}C$에서 저장한 경우 24.76 및 28.42 mg >$CO_2$/kg/hr로 서로 비슷한 값을 나타내었다. 표면색 변화에 있어서는 처리 구별 L, a, b값이 크게 변하지 않았으며 비타민 C는 4$^{\circ}C$의 저장 고에서 저장한 경우가 10$^{\circ}C$에서 저장한 경우보다 비타민 C 함량 이 높게 유지되었다. 4$^{\circ}C$에서 저장하고 1$^{\circ}C$ 냉각수로 세척한 후 PETE tray로 포장한 쑥갓의 총균수는 1.99 ${\times}$ 104 CFU/g, 대장균군수는 2.33 ${\times}$ $10_1 CFU/g로 무처리구 및 5-10$^{\circ}C$ 세척수로 세척한 경우에 비하여 1 log scale 정도 더 낮게 나타났으며 모든 처리구에서 E. coli는 검출되지 않았다. 관능적인 품질에 있어서도 1$^{\circ}C$냉수로 세척하고 PETE tray로 포장하여 4$^{\circ}C$에서 저장한 쑥갓의 신선도가 5 및 10$^{\circ}C$의 세척수로 세척하고 저장한 경우보다 효과 적인 것으로 나타났다.

Keywords

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