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11.
Polyakov K. M. Mordkovich N. N. Safonova T. N. Antipov A. N. Okorokova N. A. Dorovatovskii P. V. Veiko V. P. 《Crystallography Reports》2021,66(5):786-790
Crystallography Reports - Crystals of mutants of uridine phosphorylase from Shewanella oneidensis MR-1 at the active-site threonine residue were obtained, and the three-dimensional structures of... 相似文献
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Specific features of magnetic properties of three-component magnetic superlattices based on Fe/Co/Mo
S. D. Antipov G. E. Goryunov A. P. Krasheninnikov V. A. Senina G. V. Smirnitskaya P. N. Stetsenko 《Bulletin of the Russian Academy of Sciences: Physics》2007,71(11):1613-1614
Synthesis of three-component magnetic superlattices based on the Fe/Co/Mo system by cathode sputtering in an electron-oscillating discharge and their complex investigations have been performed for the first time. The fields have been investigated by X-ray diffraction, vibrational magnetometry, and Mössbauer spectroscopy with the use of completely computerized systems. Oscillations of the main magnetic parameters with a change in the Mo thickness and giant spontaneous magnetization have been found. The properties of three-component superlattices are compared with those of the analogous system based on Fe/Mo. 相似文献
15.
A. L. Antipov A. Yu. Bykovsky N. A. Vasiliev A. A. Egorov 《Bulletin of the Russian Academy of Sciences: Physics》2008,72(5):660-663
Multiple-valued logic functions given by the Allen-Givone algebra are proposed for use in optical nonquantum communication channels as tools for generating a set of secret keys of very high dimension. 相似文献
16.
A. S. Kalyuzhnaya A. M. Abakumov M. G. Rozova H. D’Hondt J. Hadermann E. V. Antipov 《Russian Chemical Bulletin》2010,59(4):706-711
The complex oxide Ca7Mn2.14Ga5.86O17.93 was synthesized by the solid-state reaction in a sealed evacuated quartz tube at 1000 °C. Its crystal structure was determined
by electron diffraction and X-ray powder diffraction. The structure can be represented as a tetrahedral framework, viz., the
polyanion [(Mn0.285Ga0.715)15O29.86]19- stabilized by the incorporated cation [Ca14GaO6]19+. The polycation consists of the GaO6 octahedra surrounded by the Ca atoms, which are arranged to form a cube capped at all places. The tetrahedral framework is
partially disordered due to the presence of tetrahedra with two possible orientations in the positions (0, 0, 0) and (x, x,
x) with x ≈ 0.15 and 0.17. The relationship between the Ca7Mn2.14Ga5.86O17.93 structures and related ordered phases with the symmetry F23, as well as the influence of the oxygen content on the ordering
in the tetrahedral framework, are discussed. 相似文献
17.
Yu. A. Lebedev Yu. M. Korolev V. M. Polikarpov L. N. Ignat’eva E. M. Antipov 《Crystallography Reports》2010,55(4):609-614
Samples of polytetrafluoroethylene were studied by X-ray diffraction. A quantitative X-ray powder diffraction analysis of
three components of the polymer was performed for the first time. All samples of polytetrafluoroethylene were found to be
three-phase and consist of one crystalline and two amorphous phases. One of the amorphous phases is composed of low-molecular-weight
products. The structure of the latter phase was established for the first time by X-ray diffraction methods and computer simulation. 相似文献
18.
Dmitrii V. Zagorevskii Tatyana V. Volkova Sergey O. Yakushin Boris G. Antipov Yurii S. Nekrasov 《Journal of mass spectrometry : JMS》1991,26(9):748-750
Fragmentation of the acetyl- and propionyl-ferrocenes under electron impact together with the rupture of C? CO bonds, characteristic of ketones, also includes elimination of water and migration of the OH group to the central metal atom, which is due to keto-enol tautomerization of the acyl group in molecular or fragment ions. 相似文献
19.
R.V. Shpanchenko M.G. Rozova A.M. Abakumov E.I. Ardashnikova M.L. Kovba S.N. Putilin E.V. Antipov O.I. Lebedev G. Van Tendeloo 《Physica C: Superconductivity and its Applications》1997,280(4):3652-280
Bulk superconductivity with Tc up to 94 K has been induced by fluorination of non-superconducting YBa2Cu3O6.11 using XeF2 as a fluorination agent. Strong changes on X-ray patterns were found after fluorination of reduced YBCO. High resolution electron microscopy of superconducting samples showed the presence of a new phase with c ≈ 13 Å which exists as noticeable areas included within a matrix of the 123 structure or which occurs as isolated defects with a limited extension. All fluorinated compounds exhibited a strong disorder along the c-direction resulting in a ‘loss’ of c-parameter on X-ray patterns. The present results demonstrate that fluorine indeed enters the YBCO structure with a significant structural rearrangement for the high level of fluorination. The structure of the fully fluorinated YBa2Cu3O6F2 phase, possibly responsible for superconductivity, has been deduced from high resolution electron microscopy. 相似文献
20.
M. Yu. Kvasnikov O. A. Romanova A. A. Silaeva M. R. Kiselev Yu. M. Korolev E. M. Antipov I. A. Krylova 《Russian Journal of Applied Chemistry》2015,88(11):1870-1876
Specific features of preparation of paint-and-varnish nickel–polymer coatings by joint cathodic electrodeposition of an amine-containing oligomeric electrolyte and nickel were studied. The coatings obtained exhibit layer-by-layer heterogeneity, with the lowest layer constituted by an intermetallic compound of nickel with iron. The coatings are characterized by higher degree of cross-linking compared to the polymer coatings without nickel. A paint-and-varnish formulation based on a nickel–polymer film-forming agent was developed for electrodeposition of corrosion- and wear-resistant coatings. 相似文献