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Quality Evaluation of Ginger Dried using a Molecular Press Dehydration Method or Employing a Dehydration Liquid  

Lee, Hyun-Suk (Korea Food Research Institute)
Kim, Byeong-Sam (Korea Food Research Institute)
Cha, Hwan-Soo (Korea Food Research Institute)
Kwon, Ki-Hyun (Korea Food Research Institute)
Publication Information
Food Science and Preservation / v.17, no.4, 2010 , pp. 478-486 More about this Journal
Abstract
The qualities of ginger prepared by an MPD (molecular press dehydration) method using maltodextrin, or dried using reused dehydration liquid, or prepared by freeze-drying or hot-air drying, were compared in terms of approximate overall composition, color, water absorption index, water solubility index, total sugar level, reducing sugar concentration, antioxidant activity, and gingerol content. The approximate composition of ginger prepared by the MPD method was lower in overall biochemical content than were those of gingers prepared using other methods. Ginger prepared by the MPD method retained the original ginger color. The water absorption and solubility index of ginger prepared by the MPD method (using maltodextrin) were better than those of gingers dried using other methods. The total sugar content did not change noticeably upon processing. The reducing sugar content of ginger prepared by hot-air drying was low. The antioxidant activity of ginger prepared by the MPD method was higher than that of freeze-dried and hot air-dried ginger samples, with values lower than those of BHA (3(2)-t-Butyl-4-hydroxyanisole) and BHT (2,6-Di-tert-butyl-4-methylphenol). The gingerol content of ginger prepared by the freeze-drying method was higher than that of gingers prepared by other methods. However, ginger constituents were present in the dehydration liquid used in the MPD method. The results indicate that both the MPD method (using maltodextrin) and the use of reused dehydration liquid are efficient methods by which ginger can be dried.
Keywords
Ginger; Molecular press dehydration method; Quality evaluation;
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Times Cited By KSCI : 12  (Citation Analysis)
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