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KMID : 0881720120270040479
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Journal of Food Hygiene and Safety
2012 Volume.27 No. 4 p.479 ~ p.486
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Quality Characteristics of Ginger(Zingiber officinale Roscoe) as the Ripening Periods
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Lee Myung-Hee
Kim Kyung-Tack
Lee Kyoung-Hae
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Abstract
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This study was conducted to demonstrate quality characteristics of ginger by making aged ginger(AG) with two methods, the frist method was that ginger was aged at constant temperature and humidity chamber for the duration of 10, 20 and 30 days, and the other method was drying the ginger just after steaming it for 3 hours. As the age was being processed, the volume of ginger’s appearance decreased rapidly and its color seemed to be darker because of the decrease in moisture. In the case of general components, the content of crude ash was depended on aged periods while the content of crude fat was independent with aged periods, and according to the content of crude protein, there was not any significant differences. The main valuable ingredient which is 6-gingerol showed the decreasing trend as it was exposed to heat with more time, and 6-shogaol which is also one of the main valuable ingredients showed high content at T-II(AG-10days). Free sugar and free amino acid of AG decreased as aged period goes by, and this study found that there were lots of essential amino acid (threonine, glutamic acid, alanine, valine, leucine and tyrosine) in ginger. The amount of unsaturated fatty acid of AG was significantly higher than the amount of saturated fatty acid of AG with the approximate ratio of 60:40, and the amount of free fatty acid of AG did not seem any big differences between AG and none AG. Considering both valuable ingredients and nutritive components, T-I (steamed ginger, SG) and T-II which was aged for 10 days were evaluated excellently.
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KEYWORD
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aged ginger(AG), steamed ginger(SG), quality characteristics
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