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KMID : 1134820100390071024
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Journal of the Korean Society of Food Science and Nutrition
2010 Volume.39 No. 7 p.1024 ~ p.1029
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Dehydration of Opuntia ficus-indica and Aloe vera Slices Using Polyethylene Glycol and Comparison with Other Drying Methods
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Yu Dong-Jin
Song Kyung-Bin
Wang Suk-Mae
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Abstract
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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.
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KEYWORD
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Opuntia ficus-indica, Aloe vera slices, polyethylene glycol, dehydration
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