mn(ii) salen complex immobilized on nano silicagel was prepared by incorporating mn(ii) salen complex into a nanosilica matrix and characterized by tga, xrd, atomic absorption spectroscopy and was successfully applied as catalyst for the oxidation of alcohols. oxidation of a series of alcohols in acetonitrile over immobilized mn(ii) salen complex using tetrabutylammonium peroxymonosulfate (tbao...

This work presents a contribution to the study of process cold production by adsorption from solar energy. In this paper, we discuss comparative operation refrigerator using silica gel-water couple and zeolite-water through dynamic modeling simulation. The mathematical model representing evolution heat mass transfer at each component has been developed. It appears that temperature two adsorbent...

Mn(II) salen complex immobilized on nano silicagel was prepared by incorporating Mn(II) salen complex into a nanosilica matrix and characterized by TGA, XRD, atomic absorption spectroscopy and was successfully applied as catalyst for the oxidation of alcohols. Oxidation of a series of alcohols in acetonitrile over immobilized Mn(II) salen complex using tetrabutylammonium peroxymonosulfate (TBAO...

periments were therefore conducted. Various methods have already been reported for thin layer chromatography of antioxidants by Seher (1), Meyer (2), Davidek and Pokorny (3) and Jonas (4). Seher utilized a two-dimension chromatography with silica gel as the adsorbent and chloroform and benzene as the solvents for development. Gallates and related compounds and NDGA remained at the starting poin...

Caro’s acid-silicagel was found to be a mild and effective catalyst for the one –pot multicomponent condensation of benzyl, aldehydes and ammonium acetate used for synthesis of 2, 4, 5-trisubstituted imidazole derivatives under solvent–free conditions. This catalyst has several advantages such as simple work-up, low cost and reusability.

A micromethod is described for the separation and quantitative determination of individual bile acids in duodenal content and bile. After a mild saponification procedure for splitting the taurine and glycine conjugates, the products are separated by thin-layer chromatography on silicagel layer with the solvent system //0-octane-ethyl acetate-acetic acid (60 ml + 35 ml + 5 ml) and determined by ...

abstract: In this paper we describe the thin layer chromatographic separation of eight of the most frequently used benzodiazepine derivates (alprazolam, bromazepam, chlorazepate potassium, chlordiazepoxide, diazepam, nitrazepam, oxazepam) and their degradation products after acid hydrolysis. Our aim was not only to develop a simple, rapid and efficient method for their separation but also the o...