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

한국식품영양과학회 (The Korean Society of Food Science and Nutrition)
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건조방법에 따른 삼투처리 단호박의 품질 특성

Quality Characteristics of Osmotic Dehydrated Sweet Pumpkin by Different Drying Methods

  • 홍주헌 (경북대학교 식품공학과) ;
  • 이원영 (상주대학교 식품공학과)
  • Hong, Joo-Heon (Dept. of Food Science and Technology, Kyungpook National University) ;
  • Lee, Won-Young (Dept. of Food Engineering, Sangju National University)
  • 발행 : 2004.11.01

초록

단호박을 이용하여 새로운 가공제품을 개발하고자 여러가지 잇점을 줄 수 있는 삼투건조를 최적조건에서 처리하고 산업적으로 많이 사용되고 있는 열풍, 진공건조와 새로운 건조방법의 적용을 위해 선정한 냉풍건조를 행한 후 품질특성을 비교 평가하였다. 삼투처리 후 열풍, 진공, 냉풍건조된 단호박의 수분함량은 sucrose로 삼투처리한 경우가 모든 건조 방법에서 glucose 처리구보다 낮았으며, 건조방법에 따른 비타민 C의 함량은 glucose로 삼투처리 후 냉풍건조한 경우가 35.69 ㎎/100 g으로 가장 높게 측정되었다. 전반적으로 침지 용액에 따른 L, a, b값은 유사한 경향이었으며, 냉풍건조가 색도변화가 가장 작게 일어나 생단호박의 색상과 유사하였다. 건조 단호박의 표면구조는 삼투용액과 건조방법에 따라 상이하였는데, 삼투처리 후 냉풍건조된 단호박을 제외하고 열풍 및 진공건조된 단호박의 조직 손상이 크게 나타났다. 건조방법 및 건조시간에 따른 수분함량과 비타민 C함량을 살펴보면 수분함량의 경우 건조효율성을 고려할 때 sucrose로 삼투처리 후 진공건조한 단호박이 가장 우수하였으나, 비타민 C함량에서는 glucose로 삼투처리 후 냉풍건조한 단호박이 가장 양호하였다. 삼투용액에 따른 건조방법별 건조속도는 sucrose로 삼투처리한 단호박의 건조속도가 glucose 처리구보다 빠름을 알 수 있었다.

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