Concept

Alcool (chimie)

Publications associées (141)

Effect of Mixing and Other Operating Parameters in Sol-Gel Processes

In this work the effect of mixing on a sol-gel process is quantitatively investigated. Titanium dioxide synthesis from titanium tetra-isopropoxide is used as a test reaction. Solutions of titanium alkoxide in isopropyl alcohol and water in isopropyl alcoho ...

2008

Selective removal of acetone and butan-1-ol from water with supported ionic liquid-polydimethylsiloxane membrane by pervaporation

Paul Joseph Dyson, Zhaofu Fei

The use of ionic liq.-polymer in supported ultrafiltration membrane in vacuum pervaporation has been verified. The ultrafiltration membranes were impregnated by two ionic liqs. (1-ethenyl-3-ethyl-imidazolium hexafluorophosphate and tetrapropylammonium tetr ...

2008

Oxidation of suspected N-nitrosodimethylamine (NDMA) precursors by ferrate (VI): Kinetics and effect on the NDMA formation potential of natural waters

Urs von Gunten, Yun Ho Lee

The potential of ferrate (Fe(VI)) oxidation to remove N-nitrosodimethylamine (NDMA) precursors during water treatment was assessed. Apparent second-order rate constants (k(app)) for the reactions of NDMA and its suspected precursors (dimethylamine (DMA) an ...

2008

Apomorphine inhibitors of amyloid-beta (abeta) fibril formation and their use in amyloidosis based disease

Hilal Lashuel

Described is a new class of small molecule inhibitors of amyloid beta protein (Abeta) aggregation, based on apomorphine. These molecules target the nucleation phase of Abeta self-assembly and interfere effectively with aggregation of Abeta 1-40 into amyloi ...

2008

Suppression of leakage currents in GaN-based LEDs induced by reactive-ion etching damages

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Julien Dorsaz, Antonino Francesco Castiglia, Mauro Mosca

Forward and reverse leakage currents in GaN/InGaN multi-quantum well light-emitting diodes (LEDs) are caused by reactive-ion etching (RIE) damages during device patterning. A method to recover the damaged surfaces, based on a chemical etch in KOH: ethylene ...

2008

RGD-Functionalized polymer brushes as substrates for the integrin specific adhesion of human umbilical vein endothelial cells

Nikolaos Stergiopoulos, Harm-Anton Klok, Paolo Silacci, Stefano Tugulu

This report demonstrates the feasibility of surface-initiated atom transfer radical polymerization to prepare thin polymer layers ("brushes") that can be functionalized with short peptide ligands and which may be of use as coatings to promote endothelializ ...

2007

Nongenomic actions of bile acids. Synthesis and preliminary characterization of 23- and 6,23-alkyl-substituted bile acid derivatives as selective modulators for the G-protein coupled receptor TGR5

Johan Auwerx, Kristina Schoonjans

23-Alkyl-substituted and 6,23-alkyl-disubstituted derivatives of chenodeoxycholic acid are identified as potent and selective agonists of TGR5, a G-protein coupled receptor for bile acids (BAs). In particular, we show that methylation at the C-23(S) positi ...

2007

Rapid synthesis of cyclodepsipeptides containing a sugar amino acid or a sugar amino alcohol by a sequence of a multicomponent reaction and acid-mediated macrocyclization

Jieping Zhu

Cyclodepsipeptides incorporating a sugar amino acid, e.g., I, have been synthesized. A three-component reaction of a sugar amino acid (SAA) deriv., an aldehyde, and a dipeptide isonitrile in refluxing methanol afforded the corresponding 5-aminooxazole whic ...

2007

Determination of the bulk cobalt valence state of co-perovskites containing surface-adsorbed impurities

Christian Ludwig

We used thermogravimetric hydrogen reduction and iodometric titration to determine the bulk valence state of cobalt in Co-perovskites containing surface carbonate hydroxide or hydroxyl groups. It could be shown that thermogravimetric hydrogen reduction exp ...

2006

One-Step Conversion of Cellobiose to C6-Alcohols Using a Ruthenium Nanocluster Catalyst

Paul Joseph Dyson, Cheng Zhao, Ning Yan, Huizhen Liu

The one-step conversion of cellulose to C6-alcs. via green and energy efficient approaches has, as far as we are aware, not been reported. Such a process presents a considerable challenge, the two key problems being (1) finding a suitable solvent that diss ...

2006

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