Results 241 to 250 of about 3,361,719 (297)

Extraction of Nanocellulose from Yerba Mate Residues Using Steam Explosion, TEMPO-mediated Oxidation and Ultra-fine Friction Grinding

Journal of Natural Fibers, 2021
In this work, we evaluated the extraction of nanocellulose from agro-industrial residue of yerba mate (YM, Ilex paraguariensis, St.Hil) sticks through chemical (bleaching and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation), physical ...
Ruan Ezequiel Gemmer, C. Borsoi, B. Hansen, Marcos Aurélio Dahlem Júnior, E. Francisquetti, Lilian Vanessa Rossa Beltrami, A. J. Zattera, André Luis Catto   +7 more
semanticscholar   +1 more source

Cellulose nanowhiskers extracted from TEMPO-oxidized jute fibers

Carbohydrate Polymers, 2012
Cellulose nanowhiskers is a kind of renewable and biocompatible nanomaterials evoke much interest because of its versatility in various applications. Here, for the first time, a novel controllable fabrication of cellulose nanowhiskers from jute fibers with a high yield (over 80%) via a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)/NaBr/NaClO ...
Xinwang, Cao, Bin, Ding, Jianyong, Yu, Salem S, Al-Deyab   +3 more
openaire   +2 more sources

A green approach for aerobic oxidation of benzylic alcohols catalysed by CuI–Y zeolite/TEMPO in ethanol without additional additives

, 2021
An efficient and green protocol for aerobic oxidation of benzylic alcohols in ethanol using CuI–Y zeolite catalysts assisted by TEMPO (TEMPO = 2,2,6,6-tetramethyl-1-piperidine-N-oxyl) as the radical co-catalyst in the presence of atmospheric air under ...
S. Senthilkumar, W. Zhong, M. Natarajan, Chunxin Lu, Binyu Xu, Xiaoming Liu   +5 more
semanticscholar   +1 more source

Industrial Oxidations with Organocatalyst TEMPO and Its Derivatives

Organic Process Research & Development, 2009
The radical TEMPO and its derivatives find a variety of industrial applications as highly selective oxidation catalysts for the production of pharmaceuticals, flavors and fragrances, agrochemicals, and a variety of other specialty chemicals. Reviewing recent notable examples, we show how and why homogeneous and heterogeneous TEMPO-mediated oxidations ...
Rosaria Ciriminna, Mario Pagliaro
openaire   +3 more sources

SiliaCat ® TEMPO: An Effective and Recyclable Oxidizing Catalyst

Topics in Catalysis, 2010
Organically modified silica-based SiliaCat TEMPO is an oxidizing catalyst that can efficiently replace other homogeneous stable nitroxyl radicals. Its high activity, reusability, leach-proof properties, selectivity towards the oxidation of alcohols into aldehydes/ketones and its capacity to carry out the oxidation in either organic solvents or water ...
Annie Michaud, Valerica Pandarus, Lynda Tremblay, Rosaria Ciriminna, Mario Pagliaro, François Béland   +5 more
openaire   +2 more sources

Oxidation pattern of curdlan with TEMPO-mediated system

Carbohydrate Polymers, 2018
In this study, the TEMPO-mediated (TEMPO/NaBr/NaClO) oxidation pattern of curdlan was investigated through comprehensively structural analysis of the corresponding oxidized products. During the structural analysis, infrared spectroscopy (IR), nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography tandem multiple angle laser ...
Rong, Tang, Jie, Hao, Ruijie, Zong, Fangxia, Wu, Yangyang, Zeng, Zhenqing, Zhang   +5 more
openaire   +2 more sources

Hemigramicidin–TEMPO conjugates: Novel mitochondria-targeted anti-oxidants

Biochemical Pharmacology, 2007
Oxidative damage to various cellular constituents (such as, proteins and lipids) mediated by reactive oxygen species (ROS) is thought to be an important mechanism underlying the pathogenesis of a variety of acute and chronic diseases. Mitochondria are the main source of ROS within most cells. Accordingly, there is increasing interest in the development
Mitchell P, Fink, Carlos A, Macias, Jingbo, Xiao, Yulia Y, Tyurina, Jianfei, Jiang, Natalia, Belikova, Russell L, Delude, Joel S, Greenberger, Valerian E, Kagan, Peter, Wipf   +9 more
openaire   +2 more sources

Preparation and characterization of cellulose nanocrystals with high stability from okara by green solvent pretreatment assisted TEMPO oxidation.

Carbohydrate Polymers, 2023
Lu Tang, Bo Wang, Shiru Bai, Bei Fan, Liang Zhang, Fengzhong Wang   +5 more
semanticscholar   +1 more source

Network swelling of TEMPO-oxidized nanocellulose

Holzforschung, 2014
Abstract: This study examines the swelling of TEMPO-oxidized nanofibrillated cellulose (NFCTEMPO, shortly NFC) on both the particle and interparticle levels. The sum of the intraparticle and interparticle swelling is referred to as the network swelling.
openaire   +4 more sources

TEMPO-Mediated Regiospecific Oxidation of Glucosides to Glucuronides

Synlett, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Rakesh N. Desai, Len F. Blackwell
openaire   +1 more source