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1.
M. P. Evstigneev V. V. Khomich D. B. Davies 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2006,80(5):741-746
The self-association of an antitumor antibiotic, daunomycin (DAU), in various buffer solutions, including water-salt solutions, phosphate buffer, HEPES, and TRIS, was studied by 1D and 2D 1H NMR spectroscopy at 500 MHz. The two-dimensional NOESY spectra and the concentration and temperature dependences of the chemical shifts of antibiotic protons in the solvents studied showed that the self-association parameters of DAU were independent of the type of buffer solutions. The most probable two spatial structures of the dimer of DAU in solution were constructed by the method of molecular mechanics. The mutual orientation of the chromophores was parallel in one structure and antiparallel in the other. 相似文献
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Rogozhkin S. V. Khomich A. A. Bogachev A. A. Nikitin A. A. Khoroshilov V. V. Kulevoy T. V. Fedin P. A. Pryanishnikov K. E. Lukyanchuk A. A. Raznitsyn O. A. Shutov A. S. Zaluzhnyi A. G. Vasiliev A. L. Presniakov M. Yu. 《Physics of Atomic Nuclei》2020,83(11):1519-1528
Physics of Atomic Nuclei - Improved mechanical properties of oxide dispersion strengthened (ODS) steels, the advanced materials for the reactor core, are due to the high density of uniformly... 相似文献
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A. V. Inyushkin V. G. Ralchenko A. N. Taldenkov A. A. Artyukhov A. A. Artyukhov Ya. M. Kravets I. P. Gnidoi A. L. Ustinov A. P. Bolshakov A. F. Popovich A. V. Savelyev A. V. Khomich V. Ya. Panchenko V. I. Konov 《Bulletin of the Lebedev Physics Institute》2007,34(11):329-333
We measured the temperature dependence of thermal conductivity of a polycrystalline CVD diamond with natural isotope composition and an isotope enriched (99.96% 12C) sample at temperatures from 5 to 420 K. The isotope enriched diamond demonstrates a considerable growth of thermal conductivity at temperatures above 80 K compared to the diamond with natural composition of isotopes. At room temperature the thermal conductivity reaches 24.3 W·cm?1K?1, and the isotope effect makes up not less than 34%. 相似文献
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Yu.?V.?PleskovEmail author M.?D.?Krotova V.?G.?Ralchenko A.?V.?Khomich R.?A.?Khmelnitskii 《Russian Journal of Electrochemistry》2005,41(3):304-309
The photocurrent and photopotential for undoped polycrystalline diamond film electrodes prepared by chemical vapor deposition and annealed in vacuum at 1500–1640°C are measured. The metal-like samples (annealed at 1630°C) have a negligible photosensitivity. Judging from the positive sign of the photopotential and the cathodic direction of the photocurrent, the material under study formally behaves as a p-type semiconductor. The photoeffects are presumably caused by structure defects, in particular, the dislocations in diamond crystallites formed close to intercrystalline boundaries during the high-temperature annealing.Translated from Elektrokhimiya, Vol. 41, No. 3, 2005, pp. 343–349.Original Russian Text Copyright © 2005 by Pleskov, Krotova, Ralchenko, Khomich, Khmelnitskii. 相似文献
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B. M. Bulychev T. M. Zvukova A. I. Sizov A. F. Aleksandrov Yu. A. Korobov M. V. Kanzyuba A. V. Khomich 《Russian Chemical Bulletin》2010,59(9):1724-1728
The diamond phase precursor, viz., poly(naphthalenehydrocarbyne) (1), was prepared. Its disordered structure is built of CH fragments with sp3-hybridized carbon atoms, and arene fragments are inserted in the structure. The use of 1 in the process of diamond layer deposition makes it possible to prepare highly qualitative thin diamond coatings with low
roughness and good optical properties. 相似文献
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Khomich E Kashapov M Vatsouro I Shokova E Kovalev V 《Organic & biomolecular chemistry》2006,4(8):1555-1560
Herein we report on the synthesis and ionophore properties of the first asymmetric p-tert-butylcalix[4]-p-R-thiacalix[4]tubes 7a-c (R = t-Bu, H, 1-adamantyl). The target compounds were obtained by the condensation of tosyloxyethoxy-p-tert-butylcalix[4]arene with the corresponding p-R-thiacalix[4]arenes in the presence of K2CO3 in acetonitrile. The complexation with sodium, potassium and rubidium iodides was studied in CDCl3-CD3OD (4:1) medium by means of 1H NMR measurements. It was found that the ionophore properties of calixtubes 7a-c are controlled by the character of the substituents at the upper rim of the thiacalix[4]arene fragment and it was shown that only the molecular tube 7c with an adamantane-containing thiacalixarene unit is capable of quantitatively binding potassium (swiftly) and rubidium (slowly) cations. 相似文献
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