The reversible adsorption of acetate on polycrystalline Au and Pt surfaces was investigated with broadband sum-frequency generation (SFG) and cyclic voltammetry. Specifically adsorbed acetate as well as coadsorbed sulfuric acid anions are observed for the first time with SFG and give rise to dramatically different SFG intensities on Au ...

A novel and straightforward method for the surface acetylation of cellulose nanowhiskers by transesterification of vinyl acetate is proposed. The reaction of vinyl acetate with the hydroxyl groups of cellulose nanowhiskers obtained from cotton linters was examined with potassium carbonate as catalyst. Results indicate that during the ...

... MEMBRANE. This technique was applied to the study of the effect of heat treatment on modified cellulose acetate mem- branes. ...

We used two chemical modifiers, tetranitromethane (TNM) and acetic anhydride, which specifically target accessible tyrosine and lysine residues, respectively, to modify Syrian hamster recombinant PrP(90-231) (rPrP) and PrP27-30, aiming at finding locations of conformational change. Modified proteins...

... a high-performance liquid chromatography system with a Waters C18 column (4.5 mm � 15 cm). The mobile phase was 15 mM acetic acid-sodium acetate (pH 4.0) containing 27 ml/L acetonitrile, ... ...

A versatile method was used to prepare modified surfaces on which metallic silver nanoparticles are immobilized on an organic layer. The preparation method takes advantage, on one hand, of the activated reactivity of some alkyl halides with Ag-Pd alloys to produce metallic silver nanoparticles and, on the other hand, of the facile production of an ...

... Porous flat cellulose membranes were successfully regenerated from flat formamide-modified cellulose acetate membranes. ...

... Accession Number : ADD408688. Title : Delrin Acetal Resin, Improving the Surface of Injection Moldings,. Corporate Author ...

In recent years, many procedures based on surface modification have been suggested to improve the biocompatibility and biofunctionality of orthopedic titanium-based implants. In this contest, the development of a new titanium-based biomaterial that could be covalently modified with biologically active molecules (i.e., RGD-peptides, growth factors, etc.) ...

... 44 Synthesis and Reactivity of Silyl-Ketene Acetal-Modified Polysiloxanes Preparation of Polysiloxanes with High Dielectric Constrants by ...

... Title : Synthesis and Reactivity of Silyl-Ketene Acetal-Modified Polysiloxanes Preparation of Polysiloxanes with High Dielectric Constraints. ...

In this study, we investigated the influence of the surface modified BaTiO3 nanoparticles on the electrical, thermophysical and micromechanical properties of ethylene-vinyl acetate (EVM) vulcanizates. Gamma-aminopropyl triethoxysilane was used as a silane coupling agent for the surface treatment of the BaTiO3 ...

Lithographic properties of a variety of acetal-derivatized styrene based polymers are reported. The structural modifications in the polymers involve varying the size of the pendent acetal moiety. the lithographic performances of the resists containing structurally modified acetals were found to be superior to the ...

...2011-07-01 2011-07-01 false Modified polymer of vinyl acetate and quaternary ammonium...Chemical Substances § 721.8658 Modified polymer of vinyl acetate and quaternary ammonium...substance identified generically as modified polymer of vinyl acetate and quaternary...

... 2010-07-01 false Modified polymer of vinyl acetate and quaternary ammonium...Substances § 721.8658 Modified polymer of vinyl acetate and quaternary ammonium...substance identified generically as modified polymer of vinyl acetate and quaternary...

Biological processes may be used to convert gas phase substrates, such as H(2)S, CH(4), CO, H(2), and CO(2), to useful products. Utilization of these substrates is often a mass transfer limited process, first requiring absorption across the gas-liquid interface and diffusion through the culture medium to the cell surface, prior to reaction. This article presents a method for ...

A study has been made of the adsorption of three homologues in the N-alkylpyridinium chloride series from water and salt solutions, over a wide range of concentrations, on cellulose acetate ultrafiltration membranes, Grades UAM-500 and UAM-150. When adsorption takes place from true solutions, the membrane surface is hydrophobized. In the region of micellar ...