Role Of Oxygen Species Research Articles

The role of oxygen species in photoconduction of surface oxidized Ge films

Surface oxidized Ge films show photoconduction for photons higher than 2.5 eV at room temperature, which is quite similar to that in Te-Te-oxide films. Based on the similarity of both systems, a model for the mechanism of photoconduction is proposed in terms of photodissociation of oxygen at the semiconductor-oxide interface.

The role of oxygen species in the degradation of selected environmental chemicals

Abstract The relative rates of degradation of some simple aromatic hydrocarbons (benzene, toluene, o‐, m‐, p‐xylene and cumene when dissolved in water) with oxygen species have been determined. The oxygen species were produced photochemically from H2O2, TiO2 and humic substances. The decomposition of these chemicals is faster with TiO2 than with H2O2 or humic substances. The compounds identified are oxygenated products of both the aromatic ring and the side chain.

Generation of reactive oxygen species by Kupffer cells and blood monocytes during intestinal amebiasis in guinea pigs.

The reactive oxygen species generation capacity of Kupffer cells and blood monocytes was studied through chemiluminescence (CL) in guinea pigs, infected intracecally with Entameba histolytica, on days 0, 3, 7, 14 and 21 post infection. There was an elevated response up to the 14th post-infection day. The CL response of these cells was diminished on the 21st post infection day though it was significantly higher than up the controls. The CL response increased exponentially with the severity of cecal lesions. A direct correlation was observed between the CL response of phagocytic cells and cecal lesions of animals. The role of oxygen species in causation of tissue injury during intestinal amebiasis is postulated.