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Related to pyrocatechol: resorcinol


 (pī′rō-kăt′ĭ-kôl′, -kŏl′, -kōl′)
A biologically important phenol, C6H6O2, having two hydroxyl groups attached to the benzene ring, used in dyeing, tanning, photography, and as an antiseptic. Also called catechol.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌpaɪrəʊˈkætɪˌtʃɒl; -kɒl) or


(Elements & Compounds) another name for catechol
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈkæt ɪˌkɔl, -ˌkɒl)

a colorless, crystalline derivative of benzene, C6H6O2, used chiefly in photography, for dyeing, and as a reagent.
Also called pyrocatechol.
[1875–80; catech (u) + -ol1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
In this study, it was found that the roots's chloroform extract (48.66[+ or -]1.23 [micro]g pyrocatechol eguivalent/mg extract) had higher phenolic contents than the others, while the one containing least phenolics was the stems's chloroform extract (22.68 [+ or -]1.10 [micro]g pyrocatechol eguivalent/mg extract).
orientalis were determined with the Folin-Ciocalteu reagent using Slinkard and Singleton's method (1977), pyrocatechol was used as a standard for phenolic compound (18).
Effect of Electron-Beam Irradiation on PPO Activity Using Pyrocatechol as Substrate in Agaricus Brunnescens Fruit Bodies During Storage at 4[degrees]C.
We then repeated this process for the remaining suspect candidates with DF [greater than or equal to] 20, and we confirmed an additional two novel EOAs: Pyrocatechol and 2'-Hydroxyacetophenone (and/or its isomer 3'-Hydroxyacetophenone).
In addition, CGA intervention solely increased 2-ethylhydracrylic acid, pyrocatechol, and 3-hydroxybenzoic acid, accompanied by decreased 4-deoxyerythronic acid, nicotinamide, asparagine, D-arabitol, fructose, D-mannose, 5-hydroxyindoleacetic acid, and 2-hydroxyglutarate.
Pyrocatechol violet (PV) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) were purchased from TCI (Tokyo, Japan).
Simpson, "Equilibrium modelling of interferences in the visible spectrophotometric determination of aluminium(III): comparison of the chromophores chrome azurolS, eriochrome cyanine R and pyrocatechol violet, and stability constants for eriochrome cyanine R-aluminium complexes," Analytica Chimica Acta, vol.
Reagents 1,1-diphenyl-2picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), sulphanilamide, N-(1-naphthyl) ethylenediamine dihydrochloride (NED), ethylenediamine tetraacetic acid (EDTA), pyrocatechol violet, sodium nitrite, aluminium chloride, butylated hydroxytoluene (BHT), and all commercial standards were purchased from Sigma-Aldrich (Germany).
Tg-HbI Phenols [mathematical [K.sup.p.sub.m] expression not reproducible] Guaiacol 0.15 0.54 Pyrocatechol 0.097 7.28 L-DOPA 1.44 1.97 Phenol 1378.55 1.07 Hydroquinone 108.25 1.62 Tg-HbII Phenols [mathematical [K.sup.p.sub.m] expression not reproducible] Guaiacol 0.39 0.40 Pyrocatechol 0.087 0.37 L-DOPA 2.65 1.25 Phenol 4.49 1.81 Hydroquinone 5.77 10.09 Note: Michaelis-Menten constants for phenols.
Polyphenol oxidase (PPO): PPO activity in brinjal leaves was determined by adding 50 u L leaf extracts to 3 mL of a solution comprising 100 mM Potassium Phosphate buffer in specified circumstances (pH 6.5 and 25 mM pyrocatechol).
[31] further found that at 37[degrees]C and pH 7.4 various phenolic substances such as pyrogallol, pyrocatechol, 1,2,4-benzenetriol, and catechin, as well as polyphenol rich extracts of tea and coffee, generated significant amounts of [H.sub.2][O.sub.2] in both the presence and the absence of metal ions.
For determination of niobium in the steel proposed several methods based on the use of complexes of Nb (V) c tetrazolium salts and poly-phenols (4-nitropirokatehin, 2,3-dihydroxynaph-thalene and pyrocatechol [9].