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11.
Krasilnikov OM Vekilov YK Mosyagin IY Isaev EI Bondarenko NG 《J Phys Condens Matter》2012,24(19):195402
The elastic phase transitions of cubic metals at high pressures are investigated within the framework of Landau theory. It is shown that at pressures comparable with the magnitude of the bulk modulus the phase transition is connected with the loss of stability relative to uniform deformation of the crystalline lattice. Discontinuity of the order parameter at the transition point and its equilibrium value are expressed through the second-?to fourth-order elastic constants. The second-,third-?and fourth-order elastic constants and phonon dispersion curves of vanadium under hydrostatic pressure are obtained by first-principles calculations. Structural transformation in vanadium under pressure is studied using the obtained results. It is shown that the experimentally observed at P?≈?69?GPa phase transition in vanadium is the first-order phase transition close to a second-order phase transition. 相似文献
12.
Ant?nio Pereira Brand?o Plamen Koshlukov Alexei Krasilnikov 《Monatshefte für Mathematik》2009,57(2):247-256
Let K be an infinite integral domain, and let A = M
2(K) be the matrix algebra of order two over K. The algebra A can be given a natural
\mathbbZ2{\mathbb{Z}_2} -grading by assuming that the diagonal matrices are the 0-component while the off-diagonal ones form the 1-component. In
this paper we study the graded identities and the graded central polynomials of A. We exhibit finite bases for these graded identities and central polynomials. It turns out that the behavior of the graded
identities and central polynomials in the case under consideration is much like that in the case when K is an infinite field of characteristic 0 or p > 2. Our proofs are characteristic-free so they work when K is an infinite field, char K = 2. Thus we describe finite bases of the graded identities and graded central polynomials for M
2(K) in this case as well. 相似文献
13.
V. V. Krasilnikov S. E. Savotchenko 《Bulletin of the Russian Academy of Sciences: Physics》2010,74(11):1555-1558
Evolution of radiation barrier (vacancies and interstitials) clusters is analyzed under low temperature radiation in the presence
of the most important secondary effects: recombination and formation of divacancy complexes. It is proposed a barrier hardening
model in that mechanisms of mutual annihilation of the vacancy and interstitial barriers and their clusterization play a main
role. It is taken into account reducing barrier densities due to barrier mutual annihilation of two different types and developing
the large clusters by interconnection of two barriers of the same type. 相似文献
14.
L. N. Yuldasheva A. Cruz e Carvalho O. V. Krasilnikov 《Journal of inclusion phenomena and macrocyclic chemistry》2008,60(1-2):65-70
It is believed that the biological effects of chelating agents such as crown ethers are largely related to their ability to
form complexes with ions and/or to facilitate ion transport across membranes. Specific influences are rarely related. Here
we present the evidence that even one of the simplest representatives of the crown ether super-family, 1,4,7,10,13,16-hexaoxacyclooctane
(18-crown-6), is able to affect the activity of Na+, K+-ATPase directly. Using nonlinear regression fitting to kinetic data we have found that the crown ether diminishes the apparent
Michaelis constant, K
m
, and the maximal rate of ATP hydrolysis, V
m
, acting as noncompetitive inhibitors. The apparent dissociation constants, K
i
, for the crown interaction with the free ATPase and with the enzyme-substrate complex were established to be of 77 ± 3 mM
and 21 ± 2 mM, respectively. So 18-crown-6 possesses weak but “direct” pharmacological activity on Na+, K+-ATPase hinders the formation of enzyme–substrate complex and detains the enzyme in this state. 相似文献
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16.
Antônio Pereira BrandãoJr Plamen Koshlukov Alexei Krasilnikov 《Monatshefte für Mathematik》2009,157(3):247-256
Let K be an infinite integral domain, and let A = M
2(K) be the matrix algebra of order two over K. The algebra A can be given a natural -grading by assuming that the diagonal matrices are the 0-component while the off-diagonal ones form the 1-component. In
this paper we study the graded identities and the graded central polynomials of A. We exhibit finite bases for these graded identities and central polynomials. It turns out that the behavior of the graded
identities and central polynomials in the case under consideration is much like that in the case when K is an infinite field of characteristic 0 or p > 2. Our proofs are characteristic-free so they work when K is an infinite field, char K = 2. Thus we describe finite bases of the graded identities and graded central polynomials for M
2(K) in this case as well.
A. Krasilnikov has been partially supported by CNPq and FINATEC. 相似文献
17.
Krymsky G. F. Pravdin M. I. Sleptsov I. E. Krasilnikov A. D. 《Physics of Atomic Nuclei》2019,82(6):747-749
Earlier, we reported on registration of three sequential events with energies greater than 1019 eV with two installations of EAS (Yakutsk and Telescope Arrays) for one day. Here we take into account that a moving relativistic source creates a particle beam due to the Cherenkov effect. In this case, with a certain orientation of the direction of movement of the source relative to the observer and direction of the interstellar magnetic field, there is a mechanism that allows to explain the observed sequence of the recorded events.
相似文献18.
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Ohne Zusammenfassung 相似文献
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