• The Korean Journal of Food And Nutrition
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• v.11 no.1
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• pp.82-87
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• 1998

To study of production of Panax ginseng leaf tea, after harvested the leaves in July, August, and September as ripening season, the content and composition of ginseng saponin were investigated. 1. Crude saponin contents in the leaves were a about 16.5%, and they were found to be lower in the leaf harvested in September than those harvested in July or August. 2. As similar patterns were observed with month to month in ginsenoside, sum of major ginsenosides of -Re, -Rd and -Rg1 was fixed about 70% of saponin at harvested in each month. And minor components were ginsenoside -Rb1, -Rb2 and -Rc as in order. 3. The ratio of protopanaxadiol(PD)/protopanaxatriol(PT) was revealed reduction of 1.13 of harvested in July to 0.85 of those in September gradually. The contents of protopanaxadiol were high in the leaves of August and protopanaxatriol was high in those September.

• Journal of Ginseng Research
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• v.25 no.3
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• pp.107-111
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• 2001

Fresh Panax gineng C.A. cultivated in Korea(Korean red ginseng) was found to be ineffective as anticarcinogenic or cancer preventive in experimental animal model or in human case-control and cohort study. However, when treated with heat, the fresh ginseng, white ginseng were highly effective cancer preventives. Four compounds including 20(S)-ginsenoside Rh$_1$(Rh$_1$), 20(S)-ginsenoside Rh$_2$(Rh$_2$), 20(S)0-siwenoside Rg$_3$(Rg$_3$) and sinsenoside Rg$\sub$5/ were consequently purified from Korean red ginseng, and they were tested by Yun\`s 9 week medium-term anticarcinogenicity test model. Rg$_3$ and Rg$\sub$5/ statistically significantlydecreased the incidence of benzo(a)pyrene-induced mouse lung tumor, Rh$_2$showed tendency of decrease, and Rh1 showed no effect. It is, therefore, concluded that Rg$_3$ and Rg$\sub$5/ are active anticarcinogenic components in res ginseng and they either singularly or synergistically act in the prevention of cancer.