Vol 2, No 5 (2007)
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CHEMISTRY AND TECHNOLOGY OF ORGANIC SUBSTANCES
3-16 350
Abstract
This article presents the results obtained by means of polarographic investigation and EPR spectra in a series of substituted nitro- and meta-dinitrobenzenes in aprotic solvents. The theoretical data obtained with the use of quantum-chemical MOHcalculations with Mac Lachlan correction and INDO were discussed.
17-20 372
Abstract
During the reaction between the norbornadiene and bis-η3 -allyl nickel complexes Niall2 (all-C3H5, 1-CH3C3H4, 2-CH3C3H4) ESR method detected the presence of a paramagnetic nickel (I). The concentration is about 10-4—10-6 of the concentration of nickel imposed into the system. Dependence of paramagnetic particles concentration vs. temperature was detected. Based on the findings the structures of the complexes of nickel (I) are discussed, as well as possible ways of their formation.
21-27 328
Abstract
The new interpretation of physical phenomenon in EPR spectra of fluoroalkyl n-radicals was made. We named this phenomenon the relay charge effect of fluorine hyperfine coupling (RCE-F). The sharp relationship of Fermi contact spin density on 19F nucleus and the radical charge was found out. The orbital origin of current effect was investigated.
CHEMISTRY AND TECHNOLOGY OF MEDICINAL COMPOUNDS AND BIOLOGICALLY ACTIVE SUBSTANCES
28-32 316
Abstract
A cytosine-containing monomer for negatively charged peptide nucleic acids has been prepared for the first time, and the ways of its synthesis have been optimized.
33-36 348
Abstract
Solid-phase Boc-protocol and synthetic strategy of negatively charged peptide nucleic acids has been suggested. New thymine containing negatively charged PNA decamer based on L-glutamic acid and glycine was synthesized.
THEORETICAL BASIS OF CHEMICAL TECHNOLOGY
37-46 406
Abstract
Extractive distillation of cyclohexane – benzene – ethylbenzene – n-propylbenzene mixture with aniline as separating agent in complexes with partially thermally coupled columns was investigated. Manifold of the workable flow sheets were synthesized. Each flow sheet was optimized by the criteria of the scheme minimum energy consumption. The optimal flow sheet was found which is characterized by the energy consumption 17% lower as compared to the best one with two-outlet columns.
47-50 340
Abstract
By numerical simulation methods the possibility of separation of ethanol–water azeotropic mixture by means of a distillation unit, including columns at different pressures was investigated.
CHEMISTRY AND TECHNOLOGY OF INORGANIC MATERIALS
51-56 308
Abstract
The features of formation passivation coverings of cadmium telluride on epitaxial layers CdхНg1-хТе used for manufacturing of matrix photodetectors of the IR-range are investigated. The laws of process of passivation coverings creation by a method of «the hot wall » are established at unitary and repeated use of CdTe source.
57-59 302
Abstract
Cu(II)-complexes with 2(diphenylacetyl)indandione-1,3 and relative (2-phenylethylphenyl)indandione-1,3 (isomers mixture) are synthesized and studied by various methods. These compounds may be employed for the purification of industrial samples.
60-62 405
Abstract
The article is dedicated to the investigation of preliminary purification methods for liquid radioactive wastes from organic admixtures. This impurities complicate localization, concentration and recycling radioactive wastes. Conditions of practically qualitative precipitation 60Co from technological solutions have been founded.
63-67 263
Abstract
In the article necessity of use of the specified parameter of porosity for characterization of PL layers of the porous silicon having more complex structure in comparison with usual porous mediums is shown. The provided parameter of porosity is used for comparison of properties of the porous silicon to it PL characteristics.
MATHEMATICAL METHODS AND INFORMATION SYSTEMS IN CHEMICAL TECHNOLOGY
68-73 397
Abstract
The article is delicated to deduction of the generalized equation of dynamic thermoelasticity in thermal stresses.
74-78 284
Abstract
Synthesis of the automated fuzzy control system of film thickness on calendering, based on management by difference principle and fuzzy control algorithm, is revealed in this article. The algorithm of fuzzy outlet and working of the system of film thickness on calendering is considered.
79-83 280
Abstract
The mechanism of the interaction of the surface layers of the human joint and synovial liquid under the recurrent influence is investigated. The tension distribution in the cartilage thickness and its influence on the physico - mechanical characteristics of the mentioned system is qualitatively described.
ISSN 2410-6593 (Print)
ISSN 2686-7575 (Online)
ISSN 2686-7575 (Online)
