oxidation of different types of 1,4-dihydropyridines with diphenylpicrylhydrazyl (dpp) and benzoyl peroxide (bz2o2) as free radical oxidizing agents to pyridine derivatives is reported and a mechanism for this oxidation is also proposed.

the polymer supported hypochlorite ion is a facile selective oxidizing agent for the oxidation of various alcohols to aldehydes and ketones. similarly is successfully oxidizes various hantzsch type 1,4- dihydropyridines to corresponding pyridines.

In this paper, the wear resistance and antifriction of epsilon phase layer and diffusion layer of gas nitrided D2 steel and M2 steel have been studied. The changes m wear mechanism of epsilon phase under the load from 20N to 200N are analysed. When the load is lighter than 100N, it is mainly oxidizing wear on friction surface. The adhesion, peeling off and abrasive wear appear on friction surfa...

The polymer supported hypochlorite ion is a facile selective oxidizing agent for the oxidation of various alcohols to aldehydes and ketones. Similarly is successfully oxidizes various Hantzsch type 1,4- dihydropyridines to corresponding pyridines.

By exposing to NaClO aqueous solution (commercial bleach), NiBr2 is transformed quantitatively into an insoluble nickel oxide hydroxide species. This compound contains large surface area and is a beneficial heterogeneous catalyst for oxidizing numerous organic materials. The oxidation of aldehydes and primary alcohols to carboxylic acids and secondary alcohols to ketones is showed wi...

Frank, Leonard (The Johns Hopkins University School of Hygiene and Public Health, Baltimore, Md.). Proline metabolism in Escherichia coli. II. Regulation of total growth of a proline auxotroph by a proline-oxidizing system. J. Bacteriol. 86:781-784. 1963.-With a simple kinetic model, it was shown that a proline-requiring mutant of Escherichia coli was subject to growth limitation on proline by ...

Herein, we report on nano-sized Mn oxide/carbon nanotubes, graphene and graphene oxide as water-oxidizing compounds in artificial photosynthesis. The composites are synthesized by different and simple procedures and characterized by a number of methods. The water-oxidizing activities of these composites are also considered in the presence of cerium(IV) ammonium nitrate. Some composites are effi...

Transmission electron microscopy (TEM) has been used to study the rutile TiO2 (100) surface in an oxidizing environment. By changing annealing conditions, TiO2 surfaces with different morphologies are obtained. We report a new centered (2 · 2) surface reconstruction on this surface. Our experimental data indicates that this is a meta-stable, oxygen deficient structure formed as the disordered s...