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Catechol (/ ˈ k æ t ɪ tʃ ɒ l / or / ˈ k æ t ɪ k ɒ l /), also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C 6 H 4 (OH) 2. It is the ortho isomer of the three isomeric benzenediols .
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In 1866, Henry Watts listed catechol as oxyphenic acid. [7] In 1867, August Kekulé called catechol bihydroxylbenzol (dihydroxybenzene). [8] By 1868, catechol was being listed as pyrocatechol. [9] By 1879, the Journal of the Chemical Society was recommending that catechol be called "catechol", and in the following year, it was listed as such ...
In humans, catechol-O-methyltransferase protein is encoded by the COMT gene. [8] Two isoforms of COMT are produced: the soluble short form (S-COMT) and the membrane bound long form (MB-COMT). As the regulation of catecholamines is impaired in a number of medical conditions, several pharmaceutical drugs target COMT to alter its activity and ...
Their investigation constitutes a major chapter in the history of physiology, biochemistry, and pharmacology. Adrenaline was the first hormone extracted from an endocrine gland and obtained in pure form, before the word hormone was coined. [2] Adrenaline was also the first hormone whose structure and biosynthesis was discovered.
Even when not imported several times in different forms, loanwords from French generally have a more restrictive or specialised meaning than in French: e.g. legume (in Fr. légume means "vegetable"), gateau (in Fr. gâteau means "cake").
It has been demonstrated that plants are able to use the hydroxamate-type siderophores ferrichrome, rhodotorulic acid and ferrioxamine B; the catechol-type siderophores, agrobactin; and the mixed ligand catechol-hydroxamate-hydroxy acid siderophores biosynthesized by saprophytic root-colonizing bacteria. All of these compounds are produced by ...
en bloc as a group. en garde "[be] on [your] guard". "On guard" is of course perfectly good English: the French spelling is used for the fencing term. en passant in passing; term used in chess and in neurobiology ("synapse en passant.") En plein air en plein air lit. "in the open air"; particularly used to describe the act of painting outdoors ...