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1.
O. V. Kulikov V. I. Pavlovsky A. V. Mazepa S. A. Andronati 《Chemistry of Heterocyclic Compounds》2003,39(4):485-492
The chemical properties of 8,18-disubstituted 6,16-diphenyl-1,2,3,11,12,13-tetrahydrodibenzo[g,o]-4,14-dioxa-1,5,11,15-tetraazahexadecine-2,12-diones have been studied, including their interaction with N-nucleophiles (hydroxylamine, hydrazine, semicarbazide, and thiosemicarbazide), acidic and alkaline hydrolysis, and methylation. A hypothesis has been made from analysis of the mass spectral data of the thiosemicarbazide on the preferred existence of 6-substituted 4-phenylquinazoline-2-carbaldehydes in the gas phase as the linear tautomer. 相似文献
2.
Physics of Atomic Nuclei - A model of a neural-network-like quantum-mechanical system is considered. The role of neurons is played by quantum-mechanical particles which evolve under the action of... 相似文献
3.
The products of oxidation of ethylenediaminetetraacetic acid by manganese dioxide have been used to synthesize crystals of [Cu(Edda)(Phen)] · 5H2O (Edda is ethylenediamine-N,N′-diacetate, and Phen is 1,10-phenanthroline). The X-ray diffraction analysis of the crystals shows that the N atoms of the Edda and Phen ligands lie in the equatorial plane around the Cu atom, and the O atoms of the Edda ligands are localized in more remote axial positions. The [Cu(Edda)(Phen)] complexes are grouped in pairs at a distance of 3.46 Å between the mean planes of the Phen ligands. Ten water molecules are united by hydrogen bonds into symmetric isolated clusters, and further they form a three-dimensional framework with the [Cu(Edda)(Phen)] complexes. 相似文献
4.
M.V. Chekaylo V.O. Ukrainets G.A. Il'chuk Yu.P. Pavlovsky N.A. Ukrainets 《Journal of Non》2012,358(2):321-327
This is the first comprehensive study of the processes of phase transformations (PT) and chemical reactions (CR) that accompany Ge–Se and Ag–Ge–Se charge material heating in stoichiometric proportions corresponding to GeSe2 compounds, Ag8GeSe6 argyrodite and elementary selenium. The investigation was carried out by means of the differential thermal analysis (DTA) method. The PT in selenium and the main types of PT and CR of the formation of GeSe2, Ag8GeSe6 compounds have been identified. The characteristic heats and temperature ranges of reaction processes have been determined. Ag8GeSe6 and GeSe2 compounds formation has been experimentally demonstrated due to the DTA and X-ray analysis. 相似文献
5.
Physics of Atomic Nuclei - Nowadays, graphene physics is aimed at finding a way to control the band gap of graphene, which is necessary for application of graphene in nanoelectronics. The purpose... 相似文献
6.
Physics of Atomic Nuclei - This study concerns the changes in the topological properties of four-dimensional compact lattice electrodynamics. The requirement of model compactness leads to the... 相似文献
7.
V. V. Braguta S. N. Valgushev O. V. Pavlovsky M. I. Polikarpov M. V. Ulybyshev 《JETP Letters》2013,97(9):517-519
Monte Carlo simulation of graphene in an external magnetic field perpendicular to the plane of graphene has been reported. The calculations have been performed using the effective quantum field theory with a noncompact (3 + 1)-dimensional Abelian gauge field and (2 + 1)-dimensional Kogut-Susskind fermions. It has been revealed that the external magnetic field shifts the semimetal-insulator phase transition point toward higher dielectric constants of the substrate. The phase diagram of the semimetal-insulator phase transition has been plotted in the (dielectric constant of the substrate-magnetic field) plane. 相似文献
8.
A new method based on the Monte Carlo calculation on the lattice is proposed to study the Casimir effect in the noncompact lattice QED. This method can be used for Chern-Simons surfaces (thin metal films) and for dielectric plates. 相似文献
9.
V. I. Pavlovsky S. Yu. Bachinskii N. A. Tkachuk S. Yu. Makan S. A. Andronati Yu. A. Simonov I. G. Filippova M. Gdaniec 《Chemistry of Heterocyclic Compounds》2007,43(8):1029-1037
The condensation of 5-aryl-7-bromo-1,2-dihydro-3H-1,4-benzodiazepin-2-ones with aromatic aldehydes gives 5-aryl-3-arylidene-and
5-aryl-7-bromo-3-hetarylidene-1,2-dihydro-3H-1,4-benzodiazepin-2-ones. X-ray diffraction structural analysis yielded the molecular
and crystal structures of 7-bromo-3-(4′-methoxybenzylidene)-5-phenyl-1,2-dihydro-3H-1,4-diazepin-2-one and showed that this
compound has cis configuration. Radioligand analysis was used to study the affinity of these products toward central nervous
system and peripheral benzodiazepine receptors.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1213–1225, August, 2007. 相似文献
10.
A.N. Obraztsov I.Yu. Pavlovsky V.G. Ralchenko H. Okushi H. Watanabe 《Applied Physics A: Materials Science & Processing》1999,68(6):663-666
A novel method of determination of polycrystalline diamond films’ thermoconductive properties using the photoacoustic effect
is proposed. By this method, we studied the diamond films grown on silicon substrates using chemical vapor deposition technique.
A value of thermal conductivity obtained for the films was less than half that for diamond single crystal. The decrease of
thermal conductivity, as well as characteristic features of optical properties of the films, is explained by the presence
of a large amount of intercrystallite boundaries and other structure defects and admixures detected using Raman and photoluminescent
spectroscopies.
Received: 22 October 1998 / Accepted: 27 January 1999 / Published online: 28 April 1999 相似文献