Details

Autor(en) / Beteiligte

• Shi, Y
• Wang, W
• Kang, J
• Jia, Z
• Wang, Y
• Su, B
• Yao, S
• Lin, N
• Zheng, R

Titel

Reaction of hydroxyl radical with phenylpropanoid glycoside and its derivatives by pulse radiolysis

Ist Teil von

• Science China. Life sciences, 1999-08, Vol.42 (4), p.420-426

Ort / Verlag

China: Springer Nature B.V

Erscheinungsjahr

1999

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The reaction of hydroxyl radical with 1 phenylpropanoid glycoside (PPG), cistanoside C, and its 3 derivatives: 1-0-beta-D-2-(p-hydroxyphenyl)-ethanyl-glucose, 6-O-(E)-femloyl-glucose and 6-O-(E)-p-hydroxy-cinnarnoylglucose isolated from folk medicinal herbs was investigated by pulse radiolysis technique respectively. The reaction rate constants were determined by analysis of built-up trace of absorption at lambda(max) of specific transient absorption spectra of PPG and its derivatives upon attacking . OH. All four compounds react with . OH at close to diffusion controlled rate (1. 03 x 10(9)-19.139 x 10(9) L . mol(-1) . s(-1)), suggesting that they are effective . OH scavengers. The results demonstrated that the numbers of phenolic hydroxyl groups of PPG and its derivatives are directly related to their scavenging activities. By comparing the reaction rates of . OH with 1-O-beta-D-2-(p-hydroxyphenyl)-ethanyl-glucose, 6-O-(E)-feruloyl-glucose or 6-O-(E)-p-hydroxy-cinnomoyl-glucose, it is evident that the phenylethyl group is more impofiant than phenylacryloyl group for scavenging . OH.