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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Dehydration of Carrot Slice Using Polyethylene Glycol and Maltodextrin and Comparison with Other Drying Methods

폴리에틸렌 글리콜과 말토덱스트린 첨가에 의한 당근 절편의 탈수, 건조와 기존 건조 방법과의 비교

  • Published : 2009.01.31
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Abstract

Carrots were dried using 30, 50, and 80% polyethylene glycol (PEG) or maltodextrin as a dehydrating agent, and the dried carrots were compared with the freeze dried and hot-air dried in terms of rehydration ratio, color, carotene content, and sensory evaluation. The amount of moisture loss during drying of carrots using PEG or maltodextrin increased with increasing concentration of dehydrating agent. Rehydration ratio as well as carotene content of the PEG-treated carrots were greater than those of freeze-dried or hot-air dried carrots. Regarding color and sensory evaluation of the dried carrots, the PEG-treated and maltodextrin-treated carrots were better than freeze-dried or hot-air dried carrots. These results suggest that drying of carrots using PEG or maltodextrin is a very efficient method because of its good rehydration capacity and minimal destruction of nutrients and cell structure.

폴리에틸렌글리콜과 말토덱스트린을 30, 50, 80% 농도로 처리하여 당근 절편을 건조한 후 동결건조와 열풍건조 처리된 시료와 복원율, 색도, 카로틴 함량, 관능평가 등을 비교, 분석하였다. 당근의 건조시간에 따른 탈수 양은 두 탈수제 모두 탈수제의 농도가 높을수록 최종 탈수되는 수분량이 많게 나타났으며 폴리에틸렌글리콜의 탈수 양이 말토덱스트린보다 많았다. 폴리에틸렌글리콜 처리 당근의 복원율과 카로틴 함량은 다른 건조 방법에 의한 시료보다 61, 67% 정도 높게 나타났다. 또한 색도와 관능 평가에서는 두 탈수제 첨가 처리에 의한 건조방법이 동결건조와 열풍건조와 비교하여 보다 우수한 것으로 분석되어졌다. 따라서 본 연구 결과, 폴리에틸렌글리콜과 말토덱스트린을 이용한 당근의 건조는 시료의 영양 성분 손실 및 세포의 파괴를 최소화하고 신선한 시료 본래의 상태로 복원될 수 있는 효율적인 건조 방법이라고 판단된다.

Keywords

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