|
KMID : 0352720110350010060
|
|
Journal of Ginseng Research
2011 Volume.35 No. 1 p.60 ~ p.68
|
|
|
The Chemical and 1,1-Diphenyl-2-Picrylhydrazyl Radical Scavenging Activity Changes of Ginsenosides Rb1 and Rg1 by Maillard Reaction
|
|
Yamabe Noriko
Lee Jin-Gyun
Lee Yong-Jae
Park Chan-Hum
Kim Hyun-Young
Park Jeong-Hill
Yokozawa Takako
Kang Ki-Sung
|
|
|
Abstract
|
|
|
|
The chemical and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity changes of ginsenoside Rb₁-glycine and ginsenoside Rg₁ -glycine mixtures by Maillard reaction were investigated to identify the role of Maillard reaction in the increased antioxidant activity of ginseng by heat-processing. The DPPH radical scavenging activity of Rg₁-glycine mixture was more strongly increased by heat-processing than that of Rb₁-glycine mixture. From the analyses of ginsenosides, Rb₁ was gradually changed into 20(S)-Rg₃, 20(R)-Rg₃, Rk₁ and Rg? by heat-processing. Rg₁ was gradually changed into 20(S)- Rh₁, 20(R)-Rh₁, Rk₃ and Rh₄ by heat-processing. However, the generation of these less-polar ginsenosides was not related to the increased DPPH radical scavenging activity of Rb₁-glycine and Rg₁-glycine mixtures because their DPPH radical scavenging activities were already signifi cantly increased when dried at 50℃, which temperature induce no structural changes of ginsenosides. In the comparison of browning compound levels of Rg₁-glycine and Rb1-glycine mixtures, the extents of Maillard reaction were positively correlated with their increased free radical scavenging activities. Based on the chemical and DPPH radical scavenging activity changes of Rg₁-glycine and Rb₁-glycine mixtures by heat-processing, we clearly identifi ed that the increased free radical scavenging activity of ginsenoside is mediated by the Maillard reaction between sugar moiety of ginsenoside and amino acid.
|
|
|
KEYWORD
|
|
|
Panax ginseng, Ginsenoside Rb₁, Ginsenoside Rg₁, Glycine, 1, 1-Diphenyl-2-picrylhydrazyl radical, Maillard reaction
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|