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semiquinone
(redirected from semiquinones)

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semiquinone [‚sem·ē·kwə′nōn]
(organic chemistry)
A radical ion intermediate formed in the oxidation of a hydroquinone to a quinone.
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Oxidation of catechols to semiquinones and quinones is a mechanism of tumor initiation not only for endogenous estrogens, but also for synthetic estrogens such as hexestrol and diethylstilbestrol, a human carcinogen.
Catechol quinones of estrogens in the initiation of breast, prostate, ... by Life Extension
5] from six cities and found large quantities of radicals with characteristics similar to semiquinones (Dellinger et al.
Origin and health impacts of emissions of toxic by-products and fine ... by Dellinger, Barry / Environmental Health Perspectives
The very low levels of nitrogen, sulfur, and oxygen (Table 2) indicate that amines, nitro compounds, oxides of sulfur, quinones, hydroquinones, or semiquinones are not likely to be the BDS constituents that are primarily responsible for its biologic activity.
Combustion-derived ultrafine particles transport organic toxicants to ... by Penn, Lynn / Environmental Health Perspectives
 
 
 
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