Valorisation of glycerol by condensation with acetone over silica-included heteropolyacids

Valorization of Waste Cooking Oil into Biodiesel over Heteropolyacids Immobilized on Mesoporous Silica — A Kinetic Study

Glycerol Valorization: Dehydration to Acrolein Over Silica-Supported Niobia Catalysts

The catalytic dehydration of glycerol to acrolein is investigated over silica-supported niobia catalysts in a continuous fixed-bed gas-phase reactor. Various supported niobia catalysts are prepared and characterized using surface analysis and spectroscopic methods (XRD, UV–Vis, XPS, N2 adsorption), as well as with ammonia adsorption microcalorimetry. Good results are obtained with initial glyce...

evaluation of fat atrophy in patients with dermis fat graft of orbit by ct-scan

چکیده ندارد.

Functionalization of arrays of silica nanochannels by post-condensation.

Functionalized arrays of silica nanochannels (ASNCs) were prepared by post-condensation of amino-functional alkoxysilanes (NH-silanes). The method of post-condensation combines postsynthetic grafting and co-condensation - the classical pathways for the functionalization of mesoporous silica - to afford a convenient one-pot reaction in aqueous medium. The structure of the NH-silanes determines t...

The Fluorescent Condensation Product of N’-methylnicotinamide and Acetone

In 1940 Najjar and Wood (1) detected the presence of an unknown substance appearing in human urine after the ingestion of nicotinic acid and nicotinamide. This material was isolated from urine by Huff and Perlzweig (2, 3) and was shown to be the ion N1-methylpyridinium-3carboxylic acid amide, designat,ed as N1-methylnicotinamide (I in Fig. 1). In an investigation of the chemical properties of t...