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1.
A. S. Parshin G. A. Aleksandrova S. N. Varnakov S. A. Kushchenkov S. G. Ovchinnikov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2007,1(4):462-465
The results of studying Fe/Si and Si/Fe layered structures with different thicknesses of the top layer by reflected electron energy loss spectroscopy are presented. A new method is proposed for the estimation of volume fractions of components in binary systems within the framework of the effective dielectric medium model. 相似文献
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Ivonin I. V. Lavrent'eva L. G. Aleksandrova G. A. Devyat'yarova L. L. 《Russian Physics Journal》2002,45(10):997-1000
The effect of the arsenic concentration in the vapor phase on the growth step distribution over the surface of GaAs epitaxial layers grown in a chlorine-hydride vapor-transport system on substrates with 4° (111)A and (113)A orientations is studied. It is demonstrated that the average distance between steps in the echelon depends on the arsenic concentration and increases with it up to a certain constant value. It is assumed that this is connected with the change in the kink density at the steps. 相似文献
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Conclusions A study was made of the kinetics of the alkaline hydrolysis of some phenyl esters of phosphorus acids. An estimate was made of the contribution made by the induction effect and the p–d conjugation of the phenoxyl group to the free activation energy of the alkaline hydrolysis of the investigated esters.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2794–2796, December, 1972. 相似文献
7.
V. O. Kulagina N. S. Aleksandrova A. B. Sheremetev Yu. A. Strelenko 《Russian Chemical Bulletin》2003,52(6):1447-1448
The reaction of 4,4"-bis(4-nitrofurazan-3-yl-NNO-azoxy)azoxyfurazan with ammonia affords a product of nucleophilic substitution for the furazanyldiazene oxide fragment, while the nitro groups remain intact. 相似文献
8.
P. M. Kochergin I. A. Mazur G. K. Rogul'chenko E. V. Aleksandrova B. E. Mandrichenko 《Chemistry of Heterocyclic Compounds》2001,37(2):224-226
Two novel preparative methods have been developed for the synthesis of 2,3-dihydroimidazo[1,2-a]pyrimidine from 2-aminopyrimidine. These are the reaction with 1,2-dibromoethane and also the reaction with ethylene chloro(bromo)hydrin, subsequent treatment of 1--hydroxyethyl-2-imino-1,2-dihydropyrimidine with thionyl chloride, and cyclization of the intermediate 1--chloroethyl-2-imino-1,2-dihydropyrimidine in the presence of sodium hydroxide. 相似文献
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V. S. Kuts O. V. Zhalko-Titarenko L. F. Tsekhmistrenko V. S. Aleksandrova 《Theoretical and Experimental Chemistry》1989,25(2):158-165
The methods of23Na and7Li NMR, EPR and conductimetry have been used to investigate the intermolecular interactions in systems consisting of the anion-radical salt of an alkali metal and a crown ether, dissolved in acetonitrile. Relations have been established between the structure of the complexes formed in solution, their magnetic resonance characteristics, and their limiting conductance. For solutions of anionradical salts in the presence of an excess of crown ether additional routes for conductance have been identified, connected with electron exchange reactions between the molecules of organic -acids in different charge states.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 173–182, March–April, 1989. 相似文献
10.
L. I. Skvortsova T. P. Aleksandrova V. N. Kiryushov 《Journal of Analytical Chemistry》2005,60(5):439-443
The electrochemical behavior of 2-butyne-1,4-diol was studied at solid platinum, gold, silver, cobalt, nickel, copper, and graphite electrodes. The working surfaces of the electrodes were renewed by cutting a thin 0.5-µm layer in the test solution immediately before recording every voltammogram. 2-Butyne-1,4-diol was oxidized in alkaline solutions at graphite, nickel, silver, and copper electrodes at positive potentials; the voltammograms obtained at these electrodes were suitable for analytical purposes. The dependence of the anodic current of 2-butyne-1,4-diol on its concentration was linear in the range from 0.03 to 0.3 g/L.__________Translated from Zhurnal Analiticheskoi Khimii, Vol. 60, No. 5, 2005, pp. 499–503.Original Russian Text Copyright © 2005 by Skvortsova, Aleksandrova, Kiryushov. 相似文献