Radical oxygen species

Common Names and Recommended lUPAC Names for Nitrogen Oxides and Related Oxygen Radical Species"... 

Eisner, J., Oppermann, M Czech, W., Dobos, G., Schopf, E., Norgauer, J., and Kapp, A. (1994) C3a activates reactive oxygen radical species production and intracellular calcium transients in human eosinophils. Eur. J. Immunol. 24, 518-522. 

As illustrated in Pig. 1, reactions of nonprotein and protein-bound coenzymes and metals with O2 or with H2O2 can serve as routes of production of damaging oxygen radical species. H202 can be formed from the dismutation of O2" (Eqn 4) ... 

Under O2-RIE, contrary to the O2-IBE, etching depth does not linearly increase with etching time, as is typically shown in Fig. 3. Etching begins with a relatively high rate and the rate slows down towards the end with a steady state. This is mainly because, at an initial stage, atoms other than silicon are consumed by oxygen radical species, until the oxidized silicon protection layer is... 

Scheme 2 Proposed mechanism for bicarbonate-mediated peroxidation in SOD. After Cu(II) reduction (i), bicarbonate binds to the anion-binding site (ii). In (iii), HOO" reacts with bicarbonate to form peroxycarbonate (iv). In (v), the oxygen radical species formed [O ] may oxidize endogenous or exogenous substrates. This leaves bicarbonate bound to the anion-binding site (vi). (Ref 17. Reproduced by permission of American Society for Biochemistry Molecular Biology)...

Lipid peroxidation is a problem not only in the edible oil, but also in the human body. Excess production of oxygen radical species and particularly hydroxyl radicals can affect lipid cell membranes to produce lipid peroxides and reactive oxygen species (ROS), which are linked to a variety of diseases, such as cancer and cardiovascular disease, and acceleration of the aging process. 

Table 5.2 lists data for twelve unsaturated oxygenated radical species, linear or cyclic,... 

Bors W, Lengfelder E, Saran M (1976) Reactions of oxygen radical species with methional a pulse radiolysis study. Biochem Biophys Res Commun 70 81-87... 

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