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91.
Zyatikov I. A. Losev V. F. Prokopiev V. E. Lubenko D. M. Sandabkin E. A. 《Russian Physics Journal》2021,64(3):553-558
Russian Physics Journal - The results of a study of pulse duration of superradiance on molecular nitrogen ions in air under different conditions of focusing a femtosecond laser pulse with a... 相似文献
92.
R. V. Ziatdinova N. A. Losev I. S. Teren’tev A. V. Gerasimov L. S. Yakimova V. G. Evtyugin I. I. Stoikov 《Russian Journal of General Chemistry》2017,87(9):1969-1976
Three stereoisomers (cone, partial cone, and 1,3-alternate) of p-tert-butylthiacalix[4]arene bearing four anchor propyltriethoxysilane substituents at the lower rim were synthesized for the first time. Surface modification of silica nanoparticles (d = 12 nm) with the synthesized macrocycles gave novel hybride thiacalix [4]arene?SiO2 particles. The obtained nanostructured adsorbents were found to efficiently extract nitroaromatic compounds from aqueous solutions. The partial cone and 1,3-alternate thiacalix[4]arene–SiO2 hybrid particles showed affinity to nitrophenols. 相似文献
93.
In this paper, we consider the generalized solutions of the inequality $$ - div(A(x,u,\nabla u)\nabla u) \geqslant F(x,u,\nabla u)u^q , q > 1,$$ on noncompact Riemannian manifolds. We obtain sufficient conditions for the validity of Liouville’s theorem on the triviality of the positive solutions of the inequality under consideration. We also obtain sharp conditions for the existence of a positive solution of the inequality ? Δu ≥ u q, q > 1, on spherically symmetric noncompact Riemannian manifolds. 相似文献
94.
Prof. Dr. Elena V. Boldyreva Sergey G. Arkhipov Dr. Tatiana N. Drebushchak Dr. Valeri A. Drebushchak Dr. Evgeniy A. Losev Dr. Alexander A. Matvienko Dr. Vasily S. Minkov Denis A. Rychkov Prof. Dr. Yurii V. Seryotkin Dr. Jernej Stare Dr. Boris A. Zakharov 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(43):15395-15404
In the present case study of tolazamide we illustrate how many seemingly contradictory results that have been obtained from experimental observations and theoretical calculations can finally start forming a consistent picture: a “puzzle put together”. For many years, tolazamide was considered to have no polymorphs. This made this drug substance unique among the large family of sulfonylureas, which was known to be significantly more prone to polymorphism than many other organic compounds. The present work employs a broad and in‐depth analysis that includes the use of optical microscopy, single‐crystal and powder X‐ray diffraction, IR and Raman spectroscopies, DSC, semiempirical PIXEL calculations and DFT of three polymorphs of tolazamide. This case study shows how the polymorphs of a molecular crystal can be overlooked even if discovered serendipitously on one of numerous crystallizations, and how very different molecular packings can be practically isoenergetic but still crystallize quite selectively and transform one into another irreversibly upon heating. 相似文献
95.
Combinations of oscillations with incommensurate periods are utilized to generate discrete planar structures with non-crystallographic symmetries. Some previously known tilings and results are reconsidered in this context. A new kind of decagonal tiling, its relations with the Penrose tilings, and some experimental reports are discussed. 相似文献
96.
M. A. Bzheumikhova S. V. Koldashov D. S. Losev A. G. Mayorov V. V. Mikhailov A. V. Sidorov A. A. Ulitin 《Bulletin of the Russian Academy of Sciences: Physics》2013,77(5):517-519
Solar modulation of the proton flux in Galactic space radiation during the period from the end of the 23rd to the beginning of 24th cycle of solar activity is investigated using data from the PAMELA magnetic spectrometer and ARINA scintillation spectrometer. The time dependence of proton intensity is plotted, and shows typical features in a form of rises and falls against a main trend. In order to explain these, the correlation between variations in the Galactic proton flux and solar/interplanetary parameters is investigated. 相似文献
97.
Ivan Losev 《Advances in Mathematics》2011,(6):1741
A W-algebra is an associative algebra constructed from a reductive Lie algebra and its nilpotent element. This paper concentrates on the study of 1-dimensional representations of W-algebras. Under some conditions on a nilpotent element (satisfied by all rigid elements) we obtain a criterium for a finite dimensional module to have dimension 1. It is stated in terms of the Brundan–Goodwin–Kleshchev highest weight theory. This criterium allows to compute highest weights for certain completely prime primitive ideals in universal enveloping algebras. We make an explicit computation in a special case in type E8. Our second principal result is a version of a parabolic induction for W-algebras. In this case, the parabolic induction is an exact functor between the categories of finite dimensional modules for two different W-algebras. The most important feature of the functor is that it preserves dimensions. In particular, it preserves one-dimensional representations. A closely related result was obtained previously by Premet. We also establish some other properties of the parabolic induction functor. 相似文献
98.
Optics and Spectroscopy - Abstract—The paper presents the results of a study of the temporal and spectral characteristics of lasing at $${{B}^{2}}\Sigma _{u}^{ + }{-} {{X}^{2}}\Sigma _{g}^{ +... 相似文献
99.
G. B. Demishev S. S. Kabalkina T. N. Kolobyanina T. I. Dyuzheva V. G. Losev 《高压研究》2013,33(5-6):325-327
Abstract The structures of the semiconductors SnAs, InTe, TlS and TlSe have been investigated using high-pressure (HP) diffraction technique-a gasketed diamond anvil cell (DAC)'. The pressure was measured by ruby fluorescence technique. The first order reversible transition from NaCl to CsCl structure was found in SnAs with volume discontinuity 5% the two-phase area extends from 32 to 43 GPa. The volume change V/v,(P) of the SnAs is shown in Figure 1. In agreement with the gomology rule3, the same pressure effect has been found in SnxSb1?x atP=9 GPa2. 相似文献
100.
Chistyakov D. V. Losev S. N. Abdulrazak S. H. Myl’nikov V. Yu. Kognovitskaya E. A. Zadiranov Yu. M. Deryagin N. G. Dudelev V. V. Kuchinskii V. I. Sokolovskii G. S. 《Optics and Spectroscopy》2019,127(5):848-853
Optics and Spectroscopy - A method for generation of droplet quasi-Bessel beams using a conical lens with a rounded tip is demonstrated. The study of the longitudinal distribution of the intensity... 相似文献