• in 1867, August Kekulé realized that catechol was a diol of benzene, so by 1868, catechol was listed as pyrocatechol. (wikipedia.org)
  • Upon mixing the enzyme with the substrate and exposure to oxygen (as when a potato or apple is cut and left out), the colorless catechol oxidizes to reddish-brown melanoid pigments, derivatives of benzoquinone. (wikipedia.org)
  • An enzyme of the oxidoreductase class that catalyzes the reaction between catechol and oxygen to yield benzoquinone and water. (lookformedical.com)
  • C6H4(OH)2 + H2O}}} It can be produced by reaction of salicylaldehyde with base and hydrogen peroxide (Dakin oxidation), as well as the hydrolysis of 2-substituted phenols, especially 2-chlorophenol, with hot aqueous solutions containing alkali metal hydroxides. (wikipedia.org)
  • The oxidation of β-naphthol by Volvox aureus, Lyngbya lagerlerimi and Nostoc linckia , and the oxidation of catechol by Chlorella vulgaris and V. aureus were suggested. (omicsonline.org)
  • Its methyl ether derivative, guaiacol, converts to catechol via hydrolysis of the CH3−O bond as promoted by hydroiodic acid (HI). (wikipedia.org)
  • In the reverse reaction, the 2'-hydroxyisoflavone (2'-hydroxydaidzein) is reduced to an isoflavanone. (qmul.ac.uk)
  • Catechol was first isolated in 1839 by Edgar Hugo Emil Reinsch (1809-1884) by distilling it from the solid tannic preparation catechin, which is the residuum of catechu, the boiled or concentrated juice of Mimosa catechu (Acacia catechu). (wikipedia.org)
  • 1. Fischer, D., Ebenau-Jehle, C. and Grisebach, H. Phytoalexin synthesis in soybean: purification and characterization of NADPH:2'-hydroxydaidzein oxidoreductase from elicitor-challenged soybean cell cultures. (qmul.ac.uk)
  • Catechol is produced industrially by the hydroxylation of phenol using hydrogen peroxide. (wikipedia.org)
  • There was no phenol turn over under anaerobic condition (O 2 - free nitrogen) until air was admitted when phenol removal commenced [ 4 ]. (omicsonline.org)
  • Catechol occurs as feathery white crystals that are very rapidly soluble in water. (wikipedia.org)
  • Two compounds, Compound 1 (1,4-dihydrophenanthrolin-4-one-3-carboxylic acid) and Compound 5 [8-(N-butyl-N-ethylcarbamoyl)-1,4-dihydrophenathrolin-4-one-3-carboxylic acid], with comparable potencies in vivo, were chosen to investigate the effect of the inhibition of the hydroxylation of newly synthesized uterine collagen on the turnover of this protein in vivo. (embl.de)
  • Also acts on 2'-hydroxyformononetin and to a small extent on 2'-hydroxygenistein. (qmul.ac.uk)
  • Catechol has since been shown to occur in free form naturally in kino and in beechwood tar. (wikipedia.org)
  • Catechol occurs as feathery white crystals that are very rapidly soluble in water. (wikipedia.org)
  • These new findings suggest that the current threshold limit value of 0.2 mg/m3 of benzene soluble matter (which indicates PAH exposure) is unacceptable because, after 40 years of exposure, it involves a relative risk of 1.2-1.4 for lung cancer and 2.2 for bladder cancer. (nih.gov)
  • 9/3/2005) TOTAL DESCRIPTORS = 935 MH - 1-Acylglycerol-3-Phosphate O-Acyltransferase UI - D051103 MN - D8.811.913.50.173 MS - An enzyme that catalyzes the acyl group transfer of ACYL COA to 1-acyl-sn-glycerol 3-phosphate to generate 1,2-diacyl-sn-glycerol 3-phosphate. (nih.gov)
  • Hydroquinone is a major benzene metabolite, which is a well-known haematotoxic and carcinogenic agent associated with malignancy in occupational environments. (hindawi.com)
  • Hydroquinone, the major benzene metabolite, is a ubiquitous chemical in the environment due to its widespread application in human and industrial activities. (hindawi.com)
  • use DICARBOXYLIC ACIDS 1970-1979 MH - 3-Phosphoshikimate 1-Carboxyvinyltransferase UI - D051229 MN - D8.811.913.225.735 MS - An enzyme of the shikimate pathway of AROMATIC AMINO ACID biosynthesis, it generates 5-enolpyruvylshikimate 3-phosphate and ORTHOPHOSPHATE from PHOSPHOENOLPYRUVATE and SHIKIMATE-3-PHOSPHATE. (nih.gov)
  • Upon mixing the enzyme with the substrate and exposure to oxygen (as when a potato or apple is cut and left out), the colorless catechol oxidizes to reddish-brown melanoid pigments, derivatives of benzoquinone. (wikipedia.org)
  • Meanwhile, in the oxidative degradation of hydroquinone under a supercritical condition (409.9°C and 24.5 MPa) and subcritical condition (359.9°C and 24.5 MPa), -benzoquinone was to be an important intermediate [ 3 ]. (hindawi.com)
  • Hydroquinone is used in cosmetics (up to 2%) as a depigmenting agent in a number of topical skin creams. (nih.gov)
  • Catechol (/ˈkætɪtʃɒl/ or /ˈkætɪkɒl/), also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C6H4(OH)2. (wikipedia.org)
  • About 20,000 tonnes of catechol are now synthetically produced annually as a commodity organic chemical, mainly as a precursor to pesticides, flavors, and fragrances. (wikipedia.org)
  • This compound belongs to the class of organic compounds known as catechols. (drugbank.com)
  • Small amounts of catechol occur naturally in fruits and vegetables, along with the enzyme polyphenol oxidase (also known as catecholase, or catechol oxidase). (wikipedia.org)
  • HN - 2006(1981) MH - 2-Aminoadipate Transaminase UI - D051307 MN - D8.811.913.477.700.120 MS - A PYRIDOXAL PHOSPHATE containing enzyme that catalyzes the transfer of amino group of L-2-aminoadipate onto 2-OXOGLUTARATE to generate 2-oxoadipate and L-GLUTAMATE. (nih.gov)
  • HN - 2006(1983) MH - 2-Oxoisovalerate Dehydrogenase (Acylating) UI - D050645 MN - D8.811.682.657.350.825 MS - An NAD+ dependent enzyme that catalyzes the oxidation 3-methyl-2-oxobutanoate to 2-methylpropanoyl-CoA. (nih.gov)
  • use AMINO ACIDS, BRANCHED-CHAIN 1979, & KETO ACIDS & VALERATES 1973-1979 MH - 3-Hydroxyanthranilate 3,4-Dioxygenase UI - D050561 MN - D8.811.682.690.416.328 MS - An enzyme that catalyzes the conversion of 3-hydroxyanthranilate to 2-amino-3-carboxymuconate semialdehyde. (nih.gov)
  • use ANTHRANILIC ACID 1974-1979 MH - 3-Isopropylmalate Dehydrogenase UI - D050539 MN - D8.811.682.47.500 MS - An NAD+ dependent enzyme that catalyzes the oxidation of 3-carboxy-2-hydroxy-4-methylpentanoate to 3-carboxy-4-methyl-2-oxopentanoate. (nih.gov)
  • HN - 2006 BX - Arp2-3 Complex MH - Actin-Related Protein 3 UI - D051378 MN - D5.750.78.730.246.750 MN - D12.776.220.525.246.750 MS - A component of the Arp2-3 complex that is related in sequence and structure to ACTIN and that binds ATP. (nih.gov)