benzoquinone


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benzoquinone

[¦ben·zō‚kwə′nōn]
(organic chemistry)
References in periodicals archive ?
Large quantities of HGA are excreted daily in the urine, where it oxidizes to benzoquinones, which in turn form the melaninlike polymers that cause the discoloration of urine.
Synthesis of 2-methoxy benzoquinone and 2,6-dimenthoxybenzoquinone by selected lactic acid bacteria during sourdough fermentation of wheat germ.
Only one of the benzoquinone chemicals killed ticks, but it was not as toxic as permethrin, Carroll says.
In 1965, the alkylating agent triethyleneimino benzoquinone was the first topical sensitizer used to treat cutaneous disease, but it was abandoned on account of its mutagenic potential.
A search with Beilstein on line revealed that the compound might have 1,4 benzoquinone as a nucleus with hydroxy, methyl and methoxy groups as substituents (A).
Only a small amount (5%) is metabolized via the cytochrome P450 enzyme system to the alkylating metabolite N-acetyl-p- benzoquinone imine (NAPQI) which is responsible for the toxic effect (8).
In this work we will introduce external amino group to the chitosan on the hydroxyl groups rather than amino groups starting from chitin using para Benzoquinone (pBQ) as activating agent and Ethylene Di Amine (EDA) as source of the introduced amino groups.
Similarities between the reactions of dioxygen and alkenes with palladium(0): relevance to the use of benzoquinone and molecular oxygen as stoichiometric oxidants in palladium-catalyzed oxidation reactions.
He and his colleagues have recently found that when attacked, some of the beetles release benzoquinone, which smells vile, at least to people.
The name ubiquinone refers to the ubiquitous presence of these compounds in living organisms and their chemical structure, which contains a functional group known as a benzoquinone.
Frost claims that by producing important intermediates like catechol, adipic acid, hydroquinone, benzoquinone, gallic acid, and pyrogallol - all of which are currently made using cancer-causing benzene - his clean processes can reduce benzene use by 20%.