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1.
A. O. Manyashin A. I. Fomenko V. N. Storozhenko N. T. Berberova 《Russian Journal of Electrochemistry》2003,39(11):1240-1244
Stoichiometry and kinetics of reactions of 2,6-diphenyl-4-chloropyrylium, 4-chloroflavylium, 4-bromoflavylium, and 4-iodoflavylium perchlorates with nucleophiles N,N-dimethylaniline and n-phenylenediamine are studied using cyclic voltammetry and spectroscopy. Nucleophilic substitution in these compounds proceeds via the formation of a charge-transfer complex, which converts into a radical ion pair as a result of the electron transfer. Heterolytic clevage of the C–Hal bond occurs at the stage of pyranyl (flavanyl) radical. 相似文献
2.
I. A. Tutorskii A. I. Belogorokhov A. A. Ishchenko P. A. Storozhenko 《Colloid Journal》2005,67(4):491-496
The structure of the particles of nanocrystalline silicon synthesized in argon plasma with added oxygen is studied. An amorphous shell composed of silicon oxide is formed on the surface of silicon nanoparticles. The particles form clusters with a fractal structure. The adsorption of nitrogen on a powder of nanocrystalline silicon at 77 K is studied, and adsorption isotherms obtained for nanocrystalline silicon and nonporous silica adsorbents with identical specific surface areas are compared. The values of surface fractal dimension of powdered nanocrystalline silicon are calculated using the Frenkel-Halsey-Hill equation for multilayer adsorption under the dominant contribution of van der Waals or capillary forces. It is shown that surface fractal dimension is a structure-sensitive parameter characterizing both the morphology of clusters and the structure (roughness) of the surface of particles and their aggregates.__________Translated from Kolloidnyi Zhurnal, Vol. 67, No. 4, 2005, pp. 541–547.Original Russian Text Copyright © 2005 by Tutorskii, Belogorokhov, Ishchenko, Storozhenko. 相似文献
3.
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Wijkens P Jastrzebski JT van Der Schaaf PA Kolly R Hafner A van Koten G 《Organic letters》2000,2(11):1621-1624
A general method for the functionalization of Si-Cl terminated carbosilane dendritic molecules via organolithium or organomagnesium reagents is described. Quantitative exchange of the bromine atoms of 4-bromophenyl-functionalized dendrimers affords polylithiated species that are valuable starting materials for further functionalization, e.g., into pyridyl alcohols. The latter were successfully applied as catalyst precursors in a ruthenium-mediated ring-closure metathesis reaction. 相似文献
5.
V. B. Ganenko V. A. Gushchin Yu. V. Zhebrovskij A. A. Zybalov L. Ya. Kolesnikov O. G. Konovalov Yu. V. Kulish S. V. Marekhin M. P. Rekalo A. L. Rubashkin P. V. Sorokin Yu. O. Storozhenko A. Eh. Tenishev 《Zeitschrift für Physik A Hadrons and Nuclei》1992,341(2):205-216
The polarization observables Σ,P y ,T 1,P y ⊥ ,P y ∥ are derived in proton polarization measurements of the \(\vec \gamma d \to \vec pn\) reaction, using a linearly polarized photon beam of energies between 300 and 600 MeV for c.m.s. proton emission angles of 90° and 120°. A multipole analysis is performed in the framework of the gauge-invariant pole model considering theγN→πN amplitudes and the deuteron structure without dibaryon resonances and with different sets of isovector and isoscalar dibaryon resonances. It is shown that the inclusion of dibaryon resonances substantially improves agreement with experimental data. 相似文献
6.
É. A. Storozhenko 《Mathematical Notes》1976,19(2):113-120
We obtain necessary and sufficient conditions such that, for f(x) from LP(0, 1), the integral
0
1
¦f (x)¦qdx (0<p<1,p<q<p(1 –p)–1) is convergent, or for f LP[0, 1] for all p 1, the integral
0
1
e¦f(x)¦dx is convergent.Translated from Matematicheskie Zametki, Vol. 19, No. 2, pp. 187–200, February, 1976. 相似文献
7.
P. A. Storozhenko A. A. Grachev A. O. Klochkov V. I. Shiryaev 《Russian Journal of Applied Chemistry》2013,86(3):387-393
Continuous organomagnesium synthesis of a number of organic derivatives of 14th group elements of the periodic table was examined in a column apparatus with an agitator. An effect of a molar ratio of reactants, temperature in a reaction zone, and other factors was studied on the yield and composition of the products. 相似文献
8.
G. V. Stepanov D. Yu. Borin E. Yu. Kramarenko V. V. Bogdanov D. A. Semerenko P. A. Storozhenko 《Polymer Science Series A》2014,56(5):603-613
This work is focused on the magnetic response of magnetoactive elastomer (MAE) based on silicone polymer matrices filled with magnetic particles of magnetically hard NdFeB-alloy. Viscoelastic properties of MAE were studied by the method of oscillation shear. After magnetization in an external magnetic field of 2 T MAE samples demonstrate more than two-time increase in the storage and loss moduli and 25% increase in the loss factor. Performed study of the damping properties of the materials has shown that the oscillation time of the pendulum hammering the magnetized sample is in two times shorter than in case of the non-magnetized sample. Viscoelastic and damping properties of MAE are defined by magnetic interactions between the magnetized particles of the magnetic filler. 相似文献
9.
10.
Gordeev SN Zhukov AA de Groot PA Jansen AG Gagnon R Taillefer L 《Physical review letters》2000,85(21):4594-4597
We report on transport measurements of YBa 2Cu 3O (7-delta) single crystals with different oxygen contents in the geometry B, J ||ab (J perpendicularB). Our data show that the vortices become confined between the Cu-O planes below a well-defined temperature at which the effective size 2xi of the vortex core is approximately equal to the period of the Cu-O layers. This confinement strongly increases the vortex liquid freezing temperature. A new melting line is found separating a vortex liquid and a smectic phase, which shows an oscillatory field dependence reflecting differences between commensurate and incommensurate smectic states. 相似文献