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1.
É. I. Evko M. D. Navalikhina A. E. Chalykh M. P. Glazunov 《Russian Chemical Bulletin》1990,39(12):2451-2456
The state of the active phase on the surface of low-percentage nickel catalysts on carbon supports in the presence of new modifiers, mixed series 12 heteropoly compounds (HPC), was investigated. The presence of a modifier causes an increase in the dispersion of the nickel, formation of nickel-HPC associates on the surface of the support, and determines the high dispersion and thermal stability of the Ni particles in reducing medium. Modified nickel catalysts have higher selectivity for coal oils during liquid-phase hydrogenation of coal, and the process takes place with less gas formation.Deceased.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2705–2711, December, 1990. 相似文献
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N. I. Kulesh O. B. Maksimov V. A. Denisenko V. P. Glazunov 《Chemistry of Natural Compounds》2001,37(1):29-31
Orobol, tektorigenin, (-)-medicarpin, (±)-vestitol, and a new isoflavanone, the structure of which was established by chemical transformations and spectral data, were isolated from heartwood ofMaackia amurensis 相似文献
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Ivanova Yu. B. Semeikin A. S. Glazunov A. V. Mamardashvili N. Zh. 《Russian Journal of Organic Chemistry》2010,46(6):917-923
5,15-Bis(pyridin-2-yl)-, 5,15-bis(pyridin-3-yl)-, and 5,15-bis(pyridin-4-yl)-substituted 3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphyrins
were synthesized, and their acid-base properties in ethanol-sulfuric acid were studied by spectrophotometric titration. Concentration
ranges for the existence of mono- and dicationic forms of 5,15-dipyridylporphyrins and the corresponding ionization constants
were determined. The effect of pyridine fragments on the basic properties of alkyl-substituted porphyrins was discussed. 相似文献
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We consider the moduli spaces of hyperelliptic curves, Artin–Schreier coverings, and some other families of curves of this type over fields of characteristic p. By using the Postnikov method, we obtain expressions for the Kloosterman sums. The distribution of angles of the Kloosterman sums was investigated on a computer. For small prime p, we study rational points on curves y
2 = f(x). We consider the problem of the accuracy of estimates of the number of rational points of hyperelliptic curves and the existence of rational points of curves of the indicated type on the moduli spaces of these curves over a prime finite field. 相似文献
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A. V. Khomchenko A. B. Sotsky A. A. Romanenko E. V. Glazunov A. V. Shulga 《Technical Physics》2005,50(6):771-779
A waveguide technique for measuring the absorption coefficient, refractive index, and thickness of thin films is suggested.
It is based on taking the angular dependence of the light beam reflection coefficient in an optical scheme involving a prism
coupler. Application of the technique to determining the parameters of thin-film waveguides, insulating coatings, and metal
films is considered. 相似文献
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