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 Opuntia ficus-indica and Aloe vera Slices Using Polyethylene Glycol and Comparison with Other Drying Methods

폴리에틸렌글리콜 처리에 의한 백년초, 알로에 절편의 탈수 및 건조와 기존 건조 방법과의 비교

  • Yu, Dong-Jin (Dept. of Food Science & Technology, Chungnam National University) ;
  • Wang, Suk-Mae (Dept. of Food Science & Technology, Chungnam National University) ;
  • Song, Kyung-Bin (Dept. of Food Science & Technology, Chungnam National University)
  • Received : 2010.03.16
  • Accepted : 2010.04.16
  • Published : 2010.07.31
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Abstract

Opuntia ficus-indica and Aloe vera slices were dried using 20, 30, and 40% polyethylene glycol (PEG) 4,000 as a dehydration agent, and the dried samples were compared with the hot-air dried and freeze dried in terms of rehydration ratio, color, and sensory evaluation. The moisture content of the PEG-treated samples decreased with increasing concentrations of polyethylene glycol. The rehydration ratio of the PEG-treated samples was better than those of the hot air-dried or freeze-dried samples. The color of the PEG-treated samples was similar to that of the freeze-dried samples and better than that of the hot air-dried samples. The sensory evaluation of PEG-treated samples was better than those of the hot air-dried or freeze-dried samples. These results suggest that dehydration of Opuntia ficus-indica and Aloe vera slices using PEG is very effective in terms of rehydration ratio and minimal damage of cell structure.

폴리에틸렌글리콜(PEG) 4,000을 20, 30, 40% 농도로 처리하여 백년초와 알로에 절편을 건조한 후, 열풍건조와 동결건조 처리된 시료와 복원율, 색도, 관능평가 등을 비교, 분석하였다. 건조시간에 따른 탈수 양은 두 시료 모두 PEG의 농도가 높을수록 탈수효율이 좋았다. 복원율에서는 열풍건조와 동결건조 처리 시료보다 PEG 처리 시료가 더 높은 복원율을 가졌다. 색도에서는 동결건조와 유사하였고 열풍건조보다는 우수하였다. 관능평가에서는 열풍건조나 동결건조보다 PEG 처리한 시료가 더 우수하였다. 따라서 본 연구 결과, PEG를 이용한 백년초와 알로에 절편의 건조는 시료의 세포파괴를 최소화하고 신선한 시료 본래의 상태로 복원될 수 있는 매우 효율적인 건조방법이라고 판단되며, 건조된 제품을 향후 기능성화장품 원료 등으로의 활용이 가능하다고 판단된다.

Keywords

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