Bonamia ostreae is a protozoan, affiliated to the order Haplosporidia and to the phylum Cercozoa. This parasite is intracellular and infects haemocytes, cells notably involved in oyster defence mechanisms. Bonamiosis due to the parasite B. ostreae is a disease affecting the flat oyster, Ostrea edulis. The strategies used by protozoan parasites to circumvent host defence mechanisms remain largel...

The organic hydroperoxides tert-butyl hydroperoxide and cumene hydroperoxide are tumor promoters in the skin of SENCAR mice, and this activity is presumed to be mediated through the activation of the hydroperoxides to free radical species. In this study we have assessed the generation of free radicals from organic hydroperoxides in the target cell (the murine basal keratinocyte) using electron ...

We have used spin-trapping techniques to identify radical species formed during the NADPH-stimulated peroxidation of rat hepatic microsomes. Using 5,5-dimethyl-1-pyrroline-1-oxide, we have confirmed the presence of substantial quantities of superoxide but found evidence for the formation of only small quantities of hydroxyl radical. Use of the spin traps N-tert-butyl-alpha-4-pyridylnitrone-1-ox...

Objective: The present investigation was aimed to justify the scientific basis in traditional use of Drynaria quercifolia as anti-inflammatory agent in North-East India. Methods: In-vitro antioxidant activities were evaluated by Reducing power method, Superoxide scavenging method and DPPH radical scavenging method. In-vitro and in vivo anti-inflammatory activity were evaluated using albumin den...

The 2-ethoxycarbonyl-2-methyl-3,4-dihydro-2H-pyrrole-l-oxide (EMPO), an easily prepared pyrroline-N-oxide has been tested as a free radical scavenger. Spin adducts of superoxide, hydroxyl radical, and other free radicals were characterized in phosphate buffer at pH 7.0 and 5.6. At pH 7 in phosphate buffer, the EMPO/O(2)(-*) spin adduct was estimated to be about five times more persistent than i...

Lantadenes are pentacyclic triterpenoids present in the leaves of the plant Lantana camara. In the present study, in vitro antioxidant activity and free radical scavenging capacity of lantadene A was evaluated using established in vitro models such as ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picryl-hydrazyl (DPPH•), hydroxyl radical (OH•), nitric oxide radical (NO•), superoxide ...

Transitional metal oxide nanoparticles as advanced environment and energy materials require very well absorption performance to apply in practice. Although most metal oxides are based on crystalline, high activities can also be achieved with amorphous phases. Here, we reported the adsorption behavior and mechanism of methyl blue (MB) on the amorphous transitional metal oxide (Fe, Co and Ni oxid...

quenched effectively by the in vitro addition of free radical scavengers, e.g. butyl hydroxytoluene, d-ƒ¿-tocopherol and 2, 5-diphenylfuran, while super oxide dismutase, catalase and D-manmtol gave only negligible inhibitions on AOLO-induced liver CL. The luminescence spectrum recorded by a filter spectral analyzing method gave definitive two emission peaks at 585 and 635 nm and broad emission ...