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
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.
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
 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