The persistent free radical content in petroleum is of the order 1018 spins/g (1 μmol/g), with higher and lower values found depending on origin different distillation fractions. field radicals was reviewed aim addressing explaining apparent inconsistencies between persistence reactivity. macroscopic average concentration over geological time, but individual species are short-lived reactive. ca...

the antioxidant activity of the different extracts and fractions of aerial parts of otostegia persica (burm.) boiss. were evaluated using beta-carotene bleaching and lipid peroxidation methods. the inhibitory activity of the plant extracts on the peroxidation of linoleic acid were measured by ferric thiocyanate method in comparison to methanolic extracts of green tee, ginkgo biloba, vit.e and b...