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1.
2.
S. A. Bulgakova A. I. Mashin I. A. Kazantseva D. E. Kashtanov M. M. Jones G. S. Tsepkov A. V. Korobkov A. V. Nezhdanov 《Russian Journal of Applied Chemistry》2008,81(8):1446-1451
Polymer films with a dispersed liquid crystal were prepared by photopolymerization of (meth)acrylic monomers. The electrooptical properties of these films were studied. The influence exerted by the composition of the monomer mixture, cross-linking agents, and chain-transfer agent on the liquid crystal drop size and on the transmission of the polymer-liquid crystal films was examined. 相似文献
3.
4.
This paper studies isentropic solutions of quasilinear first-order equations with two independent variables and a flux function
that is only continuous. The isentropic solutions are characterized by the requirement that the S. N. Kruzhkov entropy conditions
hold for these solution with the equality sign. It turns out that the existence of a nonconstant isentropic solution imposes
rather strong restrictions on the nonlinearity. In particular, it is shown that on the minimal interval containing the essential
image of the isentropic solution, the flux function satisfies the local Lipschitz condition, and its generalized derivative
is a function of locally bounded variation. Also, it is proved that when the flux function is nonlinear, any isentropic solution
is continuous on nondegenerate intervals.
__________
Translated from Sovremennaya Matematika i Ee Prilozheniya (Contemporary Mathematics and Its Applications), Vol. 33, Suzdal
Conference-2004, Part 1, 2005. 相似文献
5.
V. P. Kolotov A. Yu. Andriyanov S. N. Shilobreeva V. I. Korobkov N. N. Dogadkin B. A. Chapyzhnikov Yu. M. Tsipenyuk 《Journal of Radioanalytical and Nuclear Chemistry》2007,271(3):671-678
It has been shown that gamma-activation significantly extends possibilities of activation autoradiography with respect to
determination of platinum group elements (PGE) in silicate samples. All PGE may be activated by bremsstrahlung with forming
radionuclides having convenient half-lives for autoradiography (hours-days). Digital methods for quantitative 2D-densitometry
of autoradiograph images by means of documents scanners have been developed and discussed. Approaches for increasing selectivity
of analysis by means of autoradiography have been proposed and tested on the real sample containing PGE inclusions (analysis
of decay kinetics while cooling, combination with gamma-ray spectrometry). 相似文献
6.
A. V. Virovets N. V. Podberezskaya M. N. Sokolov I. V. Korobkov V. P. Fedin V. E. Fedorov 《Journal of Structural Chemistry》1993,34(2):292-295
The crystal structure was determined for Nb2S4(S2NCEt2)4 obtained in 48% yield by the reaction of Cs4Nb2S4(NCS)8 with NaS2CNEt2 in water: a=21.181(8), b=6.958(1), c=16.623(6) Å, =133.95(2)o, V = 1764(1) Å3, space group C2/m, Z=2, dcalc=1.708 g/cm3. The measurements were carried out on a Syntex P21 diffractometer with CuK radiation. A total of 2536 reflections were measured, of which 990 were used, Raniso=0.0444. The basic fragment in this molecule is [Nb2(2–S2)2]4+, the Nb–Nb distance in which corresponds to a metal-metal single bond. The molecule is partially disordered over two positions about the twofold axis and mirror plane of the C2/m space group. The dithiocarbamate and disulfide ligands with bidentate coordination form a distorted square antiprism about each of the niobium atoms as in NbS2Cl2. The anomalously large S–S bond length in the S2 ligand [2.282(5) Å] may be attributed to inaccuracy in the determination due to disorder.Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 34, No. 2, pp. 134–138, March–April, 1993. 相似文献
7.
Data of the studies of wetting and spreading in liquid metal-solid metal systems, as well as the modification of various solid surfaces with aqueous surfactant solutions, by the autoradiography technique are reported.Translated from Kolloidnyi Zhurnal, Vol. 67, No. 1, 2005, pp. 26–31.Original Russian Text Copyright © 2005 by Dolzhikova, Bogdanova, Summ, Korobkov. 相似文献
8.
Scott J Gambarotta S Korobkov I Budzelaar PH 《Journal of the American Chemical Society》2005,127(37):13019-13029
The alkylation of the Brookhart-Gibson {2,6-[2,6-(i-Pr)2PhN=C(CH3)]2(C5H3N)} FeCl2 precatalyst with 2 equiv of LiCH2Si(CH3)3 led to the isolation of several catalytically very active products depending on the reaction conditions. The expected dialkylated species {2,6-[2,6-(i-Pr)2PhN=C(CH3)]2}(C5H3N)Fe(CH2SiMe3)2 (2) was indeed the major component of the reaction mixture. However, other species in which alkylation occurred at the pyridine ring ortho position, {2,6-[2,6-(i-Pr)2PhN=C(CH3)]2-2-CH2SiMe3}(C5H3N)Fe(CH2SiMe3) (1), and at the imine C atom, {2-[2,6-(i-Pr)2PhN=C(CH3)]-6-[2,6-(i-Pr)2PhNC(CH3)(CH2 SiMe3)](C5H3N)}Fe(CH2SiMe3) (3), have also been isolated and fully characterized. In addition, deprotonation of the methyl-imino functions and formation of a new divalent Fe catalyst {[2,6-[2,6-(i-Pr)2PhN-C=(CH2)]2(C5H3N)}Fe(mu-Cl)Li(THF)3 (4) also occurred depending on the reaction conditions. In turn, the formation of 4 might trigger the reductive coupling of two units through the methyl-carbon wings. This process resulted in the one-electron reduction of the metal center, affording a dinuclear Fe(I) alkyl catalyst {[{[2,6-(i-Pr)2C6H5]N=C(CH3)}(C5H3N){[2,6-(i-Pr)26H5]N=CCH2}Fe(CH2SiMe3)]}2 (5). Different from other metal derivatives, complex 5 could not be prepared from the monodeprotonated version of the ligand. Its reaction with a mixture of FeCl2 and RLi afforded instead [{2,6-[2,6-(i-Pr)2PhN-C=(CH2)]2(C5H3N)}FeCH2Si(CH3)3][Li(THF)4] (6) which is also catalytically active. All of these high-spin species have been shown to have high catalytic activity for olefin polymerization, producing polymers of two distinct natures, depending on the formal oxidation state of the metal center. 相似文献
9.
D. V. Yanin A. V. Kostrov A. I. Smirnov M. E. Gushchin S. V. Korobkov A. V. Strikovskii V. I. Gundorin V. V. Nazarov M. V. Starodubtsev 《Technical Physics》2012,57(4):468-477
A method of resonant near-field microwave probing is developed for contactless diagnostics of a high-pressure plasma. The
efficiency of this method in measuring the parameters of the plasma of an rf capacitive discharge in argon under atmospheric
pressure is demonstrated. The experimental results are compared with the data obtained using the independent method, the microwave
radiation “cutoff,” and with theoretical estimates. 相似文献
10.
Korobkov S. V. Gushchin M. E. Strikovskiy A. V. Loskutov K. N. Evtushenko A. A. 《Technical Physics》2019,64(1):27-33
Technical Physics - A method for creating a pressure gradient by pulsed injection of air into a large vacuum chamber for laboratory simulation of plasma phenomena in a vertically nonuniform... 相似文献