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http://dx.doi.org/10.7732/kjpr.2012.25.4.473

Changes of Ginsenosides and Physiochemical Properties in Ginseng by New 9 Repetitive Steaming and Drying Process  

Jin, Yan (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Kim, Yeon-Ju (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Jeon, Ji-Na (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Wang, Chao (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Min, Jin-Woo (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Jung, Sun-Young (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Yang, Deok-Chun (Korean Ginseng Center for Most Valuable Product, and Ginseng Resource Bank, Kyung Hee University)
Publication Information
Korean Journal of Plant Resources / v.25, no.4, 2012 , pp. 473-481 More about this Journal
Abstract
This study was conducted to investigate the contents of ginsenosides and physiochemical properties of Panax ginseng after 9 times steaming and drying treatment by using the new auto steamer which is more fast and simple than previous report. In the process of steaming and drying, the content of six major ginsenosides such as Rg1, Re, Rb1, Rc, Rb2 and Rd were gradually decreased. On the other hand, the content of seven minor ginsenosides includes Rh1, 20(S)-Rg2, 20(R)-Rg2, 20(S)-Rg3, 20(R)-Rg3, Rk1 and Rg5 were gradually increased. We observed the protopanxadiol ginsenosides such as Rb1, Rb2, Rc and Rd were converted into 20(S)-Rg3, 20(R)-Rg3, Rk1 and Rg5; similarly protopanxatriol ginsenosides of Rg1 and Re were converted into Rh1, 20(S)-Rg2 and 20(R)-Rg2. Based on the result of fresh ginseng, the contents of reducing sugar, acidic polysaccharide and total phenolic compounds were gradually increased and reached to maximum at 7 times repetitive steaming process of the fresh ginseng. Whereas DPPH radical scavenging activities were gradually decreased to 68% at 7 times steaming. New auto 9 repetitive steaming and drying process has similar production with original methods, but content of benzo(a)pyrene were not almost detected comparatively taking less time. The present results suggested that this method is best for the development of value-added ginseng industry related products.
Keywords
Panax ginseng; Ginsenoside; Steaming; Physiolochemical properties;
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