photooxidation


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photooxidation

[‚fōd·ō‚äk·sə′dā·shən]
(physical chemistry)
The loss of one or more electrons from a photoexcited chemical species.
The reaction of a substance with oxygen and light. When oxygen remains in the product, the reaction is also known as photooxygenation.
References in periodicals archive ?
Comedo formation results from the direct effect of squalene monohydroperoxide and oleic acid from lipogenesis (oleic acid) and UVA photooxidation of squalene (monohydroperoxide) or from the degradative effect of P acmes lipases on triglycerides (oleic acid).
The main degradation mechanism during artificial weathering was photooxidation and, as for thermooxidation, the influence of sodium chloride in the oxidative process (by acting as a catalyst) is the most likely hypothesis for explaining the higher degradation of the geotextile.
Stancato et al., "Photooxidation products of skin surface squalene mediate metabolic and inflammatory responses to solar UV in human keratinocytes," PLoS One, vol.
Hydroperoxides accumulate in the polymer matrix during thermooxidation reaction of PE, unlike the photooxidation reaction, where they do not accumulate [23-25].
The photooxidation of TH in alkaline solution leads to the formation of TC.
Significant evidence of photooxidation was apparent in the Ca[Cl.sub.2] brined, fermented cucumbers, and there was a reduction in texture quality that could not be explained by compositional variation.
Our previous studies showed the beneficial properties of bilberry-derived polyphenolic compounds (quercetin, anthocyanins, protocatechuic acid, ferulic acid, and chlorogenic acid) against ROS production and inflammatory damages induced by photooxidation in the retina [18, 32].
Photooxidation of dyes lead to toxic aromatic amines and hydroxylation [5].
As these compounds are exposed to sunlight upon being released into the water from the iron-containing sediment, investigations into the compounds' photooxidation degradation pathways are underway.
Kalt, "Photooxidation of the phenylazonaphthol AO20 on TI[O.sub.2]: kinetic and mechanistic investigations," Chemosphere, vol.