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

  • 제33권9호
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  • Pages.1573-1579
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  • 2004
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  • 1226-3311(pISSN)
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  • 2288-5978(eISSN)
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

  • 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
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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.

This study was conducted to develop intermediate material for new processed food from sweet pumpkin. Osmotic dehydration was carried out as pretreatment before drying. After the sweet pumpkins were pretreated under optimized osmotic dehydration conditions, they were dried by three drying methods (hot air drying, vacuum drying and cold air drying). The moisture contents of dried sweet pumpkin products by osmosis treatment (sucrose) and hot air drying, vacuum drying, and cold air drying were 14.48, 14.09 and 13.87%, respectively. Cold air drying preserved more vitamin C content and showed lower color difference than hot air drying and vacuum drying. As a result of microscopic analysis, cold air dried sweet pumpkin was observed regular tissue, while hot air and vacuum dried sweet pumpkins were observed a cell collapse following the loss of water.

키워드

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