Showing papers on "DPPH published in 1987"

TL;DR: Two types of compounds may be useful as antioxidants in vivo, although 2-imidazolthiones were more reactive than 2-IMIDazolones in the assays using DPPH and the oxidation of oxyhemoglobin.

TL;DR: Calculus of the kinetics of the reaction between the stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) and methylated urates and MNDO calculations indicate that the most stable radical of uric acid is formed by hydrogen abstraction from the 3, 7 or 9 position.