نتایج جستجو برای: oxidation polymerization

تعداد نتایج: 147020  

Journal: :Journal of Food Biochemistry 2021

The oxidation of oleuropein and 3-hydroxytyrosol by oxidases laccase, tyrosinase, peroxidase has been studied. use a spectrophotometric method another chronometric made it possible to determine the kinetic parameters Vmax KM for each enzyme. highest binding affinity was shown laccase. antioxidant capacities these two molecules have characterized, finding very similar primary capacity between th...

Journal: :Journal of Research Updates in Polymer Science 2021

Chemical modification of chloromethylstyrene - styrene copolymer throughout reaction p-substituted carboxylic acid group bis-(4,4`-dibromo)-4``-triphenylamine with the chloromethyl attached to a phenyl was carried out on soluble and polymeric cross-linked copolymer. oxidation neutral triphenylamine antimony pentachloride in dichloromethane solvent gives corresponding cation radical salt counter...

Journal: :Catalysis Communications 2022

Catalysis in pharma manufacturing processes is typically homogeneous, expensive and with hard catalyst recovery/regeneration. Herein an enzyme-inspired dry-powder molecularly imprinted polymeric (MIP) system was designed for fast, selective oxidation of a cholesterol derivative easy regeneration. The strategy involved the synthesis template-monomer (T:M) complex followed by crosslinked polymeri...

Journal: :Journal of the American Chemical Society 2004
Shuhui Qin Dongqi Qin Warren T Ford Daniel E Resasco Jose E Herrera

Polymer brushes with single-walled carbon nanotubes (SWNT) as backbones were synthesized by grafting n-butyl methacrylate (nBMA) from the ends and sidewalls of SWNT via atom transfer radical polymerization (ATRP). Carboxylic acid groups on SWNT were formed by nitric acid oxidation. The ATRP initiators were covalently attached to the SWNT by esterification of 2-hydroxyethyl 2'-bromopropionate wi...

Journal: : 2021

It was advised to use aliphatic, cycloaliphatic, aromatic petroleum resins and their derivatives obtained by oxidation of with a mixture hydrogen peroxide acetic acid as bitumen polymer-modifiers. Petroleum were ionic polymerization unsaturated compounds liquid pyrolysis products under the influence titanium tetrachloride-diethylaluminium chloride catalyst. established that maximum values adhes...

Journal: :Electroanalysis 2022

This work summarizes the electrochemical response of flavanone carbon composite electrodes in comparison with Nafion®-coated electrodes, for use as voltammetric pH sensors both buffered and low-buffered media. Square wave measurements suggest peak potential achieved from polymerization after electron-proton oxidation responds accuracy to solutions coated non-coated a shift 55.1 mV 54.6 per unit...

Journal: :Journal of the American Chemical Society 2011
Klaudia Wagner Robert Byrne Michele Zanoni Sanjeev Gambhir Lynn Dennany Robert Breukers Michael Higgins Pawel Wagner Dermot Diamond Gordon G Wallace David L Officer

An electroactive nitrospiropyran-substituted polyterthiophene, poly(2-(3,3''-dimethylindoline-6'-nitrobenzospiropyranyl)ethyl 4,4''-didecyloxy-2,2':5',2''-terthiophene-3'-acetate), has been synthesized for the first time. The spiropyran, incorporated into the polymer backbone by covalent attachment to the alkoxyterthiophene monomer units, leads to multiple colored states as a result of both pho...

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