scispace - formally typeset
Search or ask a question

Showing papers on "DPPH published in 1977"


Journal ArticleDOI
TL;DR: It was concluded that the DPPH method is reliable for tracking antioxidant disappearance in simple nonbiological systems, but in complex biological systems, at least under certain circumstances, it cannot be relied upon for measuring changes in lipid antioxygenic potential.

9 citations


Journal ArticleDOI
TL;DR: In this article, magnetic susceptibility measurements were performed on DPPH-benzene complex in a temperature range of 300-2.2 K and in a field range of 6-20 kOe.
Abstract: Magnetic susceptibility measurements are performed on DPPH-benzene complex and solvent-free DPPH in a temperature range of 300-2.2 K and in a field range of 6–20 kOe. The experimental values are quite different in these two cases and a pair model with a singlet-triplet state is proposed.

3 citations


Journal ArticleDOI
TL;DR: In this article, a study was made of the interaction of thermal polyphenylacetylene (PPA) and PPA decomposed by heat (PPAD) with diphenylpicryl hydrazyl (DPPH).
Abstract: A study was made of the interaction of thermal polyphenylacetylene (PPA) and PPA decomposed by heat (PPAD) with diphenylpicryl hydrazyl (DPPH). Concentrations of polymer molecules active in the reaction with DPPH were determined. It was shown that PPA contains two and PPAD contains more than two types of reacting molecule of different reactivities. Effective rate constants and effective activation energies of reactions were determined. It was shown that the concentration of polyphenylacetylene molecules active in reaction with DPPH exceeds by two orders of magnitude the concentration of paramagnetic centres in polymers.