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1.
Grishin D. F. Semyonycheva L. L. Telegina E. V. Smirnov A. S. Nevodchikov V. I. 《Russian Chemical Bulletin》2003,52(2):505-507
Organometallic compounds Cp2TiCl2, (EtC5H4)2NbCl2, and (PriC5H4)2WCl2 were assessed as additives that control polymer chain growth in the polymerization of methyl methacrylate. In the presence of compounds mentioned in amounts comparable with that of the initiator, a uniform process with no gel-effect occured and respective linear increase in the molecular weight of the polymer up to high degrees of the monomer conversion was observed. 相似文献
2.
V. N. Bochkarev A. V. Kisin V. G. Osipov N. P. Telegina N. G. Komalenkova A. N. Polivanov E. A. Chernyshev 《Chemistry of Heterocyclic Compounds》1978,14(1):17-18
Workup of the mixture of products of pyrolysis of cyclotetrasiloxane (Me2SiO)2(MePhSiO)2 yielded 1,3- (I) and 1,5-(o-phenylene)cyclosiloxane (II), the structures of which were established on the basis of data from their IR, PMR, and mass spectra.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 24–25, January, 1978. 相似文献
3.
4.
A. Yu. Stakheev I. S. Mashkovskii G. N. Baeva N. S. Telegina 《Russian Journal of General Chemistry》2010,80(3):618-629
Specific features of the catalytic behavior of supported palladium nanoparticles were analyzed in terms of both the size of
the particles and their interaction with the support. The influence of these factors on the activity and selectivity of palladium
nanoparticles in carbon-carbon bond hydrogenolysis, hydrogenation of aromatic compounds, olefins, and acetylenes, hydrodechlorination,
as well as complete oxidation of organic compounds was discussed. It was shown that the optimal nanoparticle size depends
on the type of the reaction and also such factors as the nature of interaction between the nanoparticles and support, absorptivity
of the substrates and catalytic reaction products, and electronic and crystal structure of the nanoparticles. 相似文献
5.
D. V. Khlopov O. V. Karban M. V. Telegina O. M. Nemtsova I. V. Zhurbin A. V. Smurygin 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2010,4(1):146-151
A method for edge contour extraction of a scanning probe microscope image is proposed. This method is developed to process
an image that has the large size irregularity and/or objects bound together. It is based on definition of the local minimum
points of brightness data function and permits one to obtain the correct edge contour line. The advantages of the proposed
method over traditional methods are demonstrated using model results. This method can be used to process different images. 相似文献
6.
E. A. Tereshina I. S. Tereshina S. A. Nikitin G. S. Burkhanov O. D. Chistyakov I. V. Telegina V. A. Belousova T. Palewski H. Drulis 《Physics of the Solid State》2008,50(1):56-62
Hydrogenated single crystals Er2Fe14Bh x with different hydrogen contents are grown and their magnetic properties are studied for the first time. It is established that both the Curie temperature and the temperature of the spin-reorientation phase transition increase with an increase in the hydrogen content. In the Er2Fe14B single crystal, the contributions of the rare-earth metal and iron sublattices to the magnetic anisotropy decrease upon hydrogenation. However, their compensation occurs at a temperature higher than that in the initial compound Er2Fe14B due to the enhancement of the Fe-Fe and R-Fe exchange interactions. The effect of hydrogenation on the magnetic characteristics of the Er2Fe14B compound with a nanocrystalline structure is investigated. It is revealed that the hydrogenation leads to an increase in the coercive force and the residual magnetization of these alloys. 相似文献
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I. S. Tereshina S. A. Nikitin G. A. Politova A. A. Opalenko E. A. Tereshina I. V. Telegina 《Physics of the Solid State》2009,51(1):92-98
The compounds Tb0.35Dy0.45Er0.2Fe2 − x
Co
x
(0 ≤ x ≤ 2) are synthesized in both polycrystalline and single-crystal states. The composition of the new multicomponent alloys
with compensated magnetic anisotropy is calculated in the framework of the single-ion magnetic anisotropy model with allowance
for the data on the temperature dependences of the magnetic anisotropy constants for RFe2 single crystals. The synthesized compounds are characterized using metallographic, chemical, X-ray diffraction, and thermomagnetic
methods. A combined analysis of the magnetic and magnetoelastic properties is also carried out. It is established that the
high magnetostriction characteristics of the rare-earth intermetallic compounds Tb0.35Dy0.45Er0.2Fe2 − x
Co
x
with a structure of Laves phases are observed in the region of the spin-reorientational phase transition whose temperature
can be varied by properly choosing the Co content. It is found that, in the room-temperature region, the magnetic susceptibility
(dλ/dH) of the composition with x = 1.3 reaches levels in excess of the value of dλ/dH for terphenol D due to the compensation of magnetic anisotropy.
Original Russian Text ? I.S. Tereshina, S.A. Nikitin, G.A. Politova, A.A. Opalenko, E.A. Tereshina, I.V. Telegina, 2009, published
in Fizika Tverdogo Tela, 2009, Vol. 51, No. 1, pp. 85–90. 相似文献
9.
S. A. Nikitin I. S. Tereshina Yu. V. Skourski N. Yu. Pankratov K. P. Skokov V. V. Zubenko I. V. Telegina 《Physics of the Solid State》2001,43(2):290-299
The magnetic anisotropy and spin-reorientation phase transitions in single crystals of the RFe11Ti (R=Lu, Ho, and Er) compounds and their hydrides are investigated. Measurements are carried out on capacitance and torque magnetometers. The magnetic anisotropy constants K 1 and K 2 are determined by the mathematical processing of experimental magnetization curves in terms of the phenomenological theory of the anisotropic ferromagnet magnetization. It is demonstrated that the hydrogenation strongly affects the magnitude and the sign of magnetic anisotropy constants, as well as the spin-reorientation phase transitions. The hydrogenation of the HoFe11Ti compound leads to the change in sign of the magnetic anisotropy constant K 1. The inference is made that a change in the atomic volume and the axial ratio c/a cannot result in the observed effects. A change in the magnetic anisotropy constants upon hydrogenation is primarily due to the change in the interaction of the quadrupole moment of a 4f electron subshell of rare-earth ions with surrounding ions of the crystal lattice and also with valence and conduction electrons. 相似文献
10.
Lakhtin V. G. Sheludyakov V. D. Ivanov P. V. Telegina N. P. Chernyshev E. A. 《Russian Journal of General Chemistry》2003,73(10):1535-1538
Action of water on chloro[chloro(alkoxy)silyl]olefins with various number of chlorines in the unsaturated moiety was studied in acidic and neutral media. Linear and cyclic oligosiloxanes with unsaturated chlorine-containing groups were obtained. Correlation between the hydrolytic stability of the Si-Csp
2 bond and the structure of the starting chlorosilylolefin was explored. 相似文献