Self-disproportionation during

Interestingly, it is reported that the scalemic samples melted with sublimation. These compounds could be good candidates for the ongoing interest on self-disproportionation during sublimation. 

The photodissociation rate coefficients are included as source and sink terms in a system of time-dependent continuity equations for the atmosphere. Modem values for vertical (eddy) diffusion and solar photon flux are utilized. The system of 2nd-order ordinary differential equations is solved by integration, and yields chemical species abundances as a function of time and altitude. The isotope atmospheric chemistry includes only SO2 isotopologue photodissociation reactions and production of SO isotopologues. Additional isotopic reactions such as SO2 oxidation by OH, SO photolysis, SO disproportionation during self-reaction, and SO dimmer formation, have been neglected. My objective here is to focus only on SO2 photolysis as a S-MIF mechanism. 

Self-Disproportionation of Enantiomers During the Purification by Achiral-Phase HPLC... 

FIG. 4 Self-disproportionation of Michael adduct enantiomers during the purification on achiral HPLC column. 

The phenoxy radicals are relatively long-lived and can undergo self-disproportionation, recombination vith alkylperoxy radicals, or isomeric rearrangement followed by recombination. The resulting compounds may have some stabilization activity. Propionate-type hindered phenols constitute a special class in this category during reaction, the phenol is transformed into phenolic cinnamates, which are known to be efficient chain-breaking antioxidants [Eq. (85)]. 

Parker, S.L., Fu, Y., McAllen, K. et al. Up-regulation of brain nicotinic acetylcholine receptors in the rat during long-term self-administration of nicotine disproportionate increase of the alpha6 subunit. Mol. Pharmacol. 65 611, 2004. 

Recently Rota et al. (1999) demonstrated that dichlorofluorescein fluorescence cannot be used re-hably to measure 02 " in cells because 02- itself is formed during the conversion of dichlorofluorescin to dichlorofluorescein by peroxidases. The disproportionation of superoxide forms H2O2 which, in the presence of peroxidase activity, will oxidise more dichlorofluorescin to dichlorofluorescein with self-amplification of the fluorescence. Because the deacetylation of dichlorofluorescin diacetate, even by esterases, can produce H2O2, the use of this probe to measure H2O2 production in cells is problematic. 

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