Химия

The researching process of reforming hexane on commercial platinum-rhenium and high-silicon zeolitic catalysts was studied. Implemented realization of the process in unhydrogen conditions instead of manufactural reforming process was found to be effective for producing high-octane components automobile of fuels. The whole reactions taking place on high-silicon zeolitic catalysts at 300°C are shown to produce a higher output of iso-paraffinic hydrocarbons which is responsible for refine of the petrol fractions in comparison with Pt/fRe/AlzOs catalysts. 

Liquid-phase oxidation of acetaldehyde with heterogeneous coppercobaltic catalysts was studied by for the first time. As the result we were known, that the catalytic system which contains of cobalt and copper of fixed complexes on silicagel was found to produce about 80% an output of acetic anhydride. The possibility of multiple-using of heterogenization complexes of cobalt and copper in reaction of acetaldehyde oxidation is improved.

Recent data on chemical substances and materials used in combustioloy for cultivating human skin cells are summarized, The chemical composition of polymeric film biomaterials of various composition, thermosensible substrates, complex cell matrices is considered.

The field of application of indispensable alpha-amino acids, including nutrient media for cultivating keratinocytes in combustiology, is outlined. Considered are some approaches to separation of alpha-amino acids with the aid of zonal electrophoresis on a cellulose matrix in terms of differencts between: molecular masses (alanine — phenilalanine, alanine —triptophane); isodielectric points ( lysine — asparagine acid), and ionic association with surfactants.

The synergetic effect of iridium (IV) and rhodium (Ill) on the rate of indicative reaction of arylamines oxidation by periodate ions in the weak-acidic medium is estimated. The range of catalysts concentration is determined where the additivity of optical density is observed. The kinetic regularities of arylamines catalytic oxidation by periodate ions in the weak-acidic medium in the presence of a-,B-cyclodexrines is studied. The probable reason of synergetic effect in reactions of arylamines catalytic oxidation is established.

The purposeful synthesis of the nitrodiphenylamines sulfoderivatives is realized for the expansion area of the using of redox reagents diphenylamines (DPA) series. Optimal conditions of the synthesis of new reagents (0-, m-, p- пио РАЗА) is determined. Acid-basic equilibriums, redox properties, spectral characteristics of o-, m-, pnitroDPASA and their oxidized forms are investigated. The oxidation processes of p-nitroDPASA by different oxidants are studied in the acid and basic media.

One of the directions of the improvement secondary school effectiveness and perfection of its work is implementing the system of special studies. It means the introduction of elective courses in special subjects into the syllabus of 10 and 11 forms. We have worked out two versions of the following courses: «Introduction in pharmaceutical chemistry» and «Laboratory methods of researches in clinic».

Matrix mesogen compositions on the base of phenyl esthers of alkylbensoic acid derivatives and cyanobiphenyls with various nematic and smectic compounds and ionogenic additives are used to show the principal possibility to extend temperature range of smectic Sa phase existence, to change its anisotropic characteristics and to improve information displays work parameters.

An end-stage technology of processing the products of arsenic-containing lewisite detoxification has been developed with reference to chemical disarmament. The production of pure (99.0 to 99.9995 wt% Аз2Оз) commercial arsenic oxide (III) is a feature of the technology.

A methodology of making and effective usage of composite materials based on multicomponent natural and technogenic raw materials has been developed, which implies the implementation of: a proper theoretical concept; some established relations between the master characteristic function, process parameters and performance indices; physicochemical and information criteria of matrix selection; a system of computer graphic studies; a manufacturing technique to afford excellent performance and multifunctionality for the composites.