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排序方式: 共有43条查询结果,搜索用时 15 毫秒
1.
Veselov Mark S. Ivanenkov Yan A. Yamidanov Renat S. Osterman Ilya A. Sergiev Petr V. Aladinskiy Vladimir A. Aladinskaya Anastasia V. Terentiev Victor A. Ayginin Andrey A. Skvortsov Dmitry A. Komarova Katerina S. Chemeris Alexey V. Baimiev Alexey Kh. Sofronova Alina A. Machulkin Alexey E. Petrov Rostislav A. Maklakova Svetlana Yu. Bezrukov Dmitry S. Filkov Gleb I. Zainullina Liana F. Maximova Marina A. Zileeva Zulfiya R. Kartsev Victor G. Vakhitova Yulia V. Dontsova Olga A. 《Molecular diversity》2020,24(1):233-239
Molecular Diversity - A series of 5-oxo-4H-pyrrolo[3,2-b]pyridine derivatives was identified as novel class of highly potent antibacterial agents during an extensive large-scale high-throughput... 相似文献
2.
Komleva N. V. Lapshina M. A. Kostyuk G. V. Ivanov A. V. Parkhomenko I. I. Papina R. I. Sen´ V. D. Terentiev A. A. 《Russian Chemical Bulletin》2015,64(5):1178-1182
Russian Chemical Bulletin - The relationship between the lipophilicity, cytotoxic effects, and intracellular accumulation for potential antitumor agents, viz., amino complexes of platinum(IV) with... 相似文献
3.
The local and global nonlinear dynamics of a two-degree-of-freedom model system is studied. The undeflected model consists
of an inverted T formed by three rigid bars, with the tips of the two horizontal bars supported on springs. The springs exhibit an elasto-plastic
response, including the Bauschinger effect. The vertical rigid bar is subjected to a conservative (dead) or non-conservative
(follower) force having static and periodic components. First, the method of multiple scales is used for the analysis of the
local dynamics of the system with elastic springs. The attention is focused at modal interaction phenomena in weak excitation
at primary resonance and in hard sub-harmonic excitation. Three different asymptotic expansions are utilised to get a structural
response for typical ranges of excitation parameters. Numerical integration of the governing equations is then performed to
validate results of asymptotic analysis in each case. A full global nonlinear dynamics analysis of the elasto-plastic system
is performed to reveal the role of plastic deformations in the stability of this system. Static 'force-displacement' curves
are plotted and the role of plastic deformations in the destabilisation of the system is discussed. Large-amplitude non-linear
oscillations of the elasto-plastic system are studied, including the influence of material hardening and of static and sinusoidal
components of the applied force. A practical method is proposed for the study of a non-conservative elasto-plastic system
as a non-conservative elastic system with an 'equivalent' viscous damping.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
4.
The local and global nonlinear dynamics of a two-degrees-of-freedom model system conveying fluid is studied. The undeflected model consistsof an inverted T formed by three rigid rods, with the tips of the twohorizontal rods resting on the viscous foundation. The foundationexhibits a visco-elasto-plastic response, including the Bauschingereffect. The vertical rigid rod of an annular cross-section is subjectedto a conservative (dead) force. Also, it conveys fluid having bothstatic and pulsation components. First, the method of multiple scales isused for the analysis of the local dynamics of the system withvisco-elastic response. Attention is focused on modal interactionphenomena in weak excitation at primary resonance and on hardsub-harmonic excitation. Two different asymptotic expansions areutilised to get a structural response for typical ranges of excitationparameters. Numerical integration of the governing equations is thenperformed to validate the results of asymptotic analysis in each case. Afull global nonlinear dynamics analysis of the visco-elasto-plasticsystem is performed. The role of plastic deformations in thedestabilisation of the system is discussed. Large-amplitude nonlinearoscillations of the visco-elasto-plastic system are studied, includingthe influence of material hardening and of static and periodiccomponents of pulsating fluid. Chaotic regimes of motion with andwithout plastic effects are considered. The results of the analysis maybe used in devices composed of a rather short tube connected to a notcompletely fixed foundation resting on the soil exhibitingelasto-plastic behaviour. 相似文献
5.
S. V. Volkov S. V. Kutyakov A. N. Levov E. I. Polyakova Le Tuan An S. A. Soldatova P. B. Terentiev A. T. Soldatenkov 《Chemistry of Heterocyclic Compounds》2007,43(10):1260-1268
It has been established that on heating, 3-benzoyl-4-hydroxy-1-methyl-4-phenylpiperidine is ring-opened in the presence of
arylamines by a type of retroaldol reaction, with subsequent transamination of the intermediate Mannich base and the formation
of 3-arylamino-1-oxo-1-phenylpropanes. When using arylhydrazines this γ-piperidol is recyclized with the formation of 1,3-diarylpyrazoles
and their 4,5-dihydro derivatives. The mass spectral behavior of a series of 3-arylamino-substituted 1-phenylpropanones has
been studied.
__________
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1486–1495, October, 2007. 相似文献
6.
Laihia K Kolehmainen E Nevalainen T Kauppinen R Vasilieva TT Terentiev AB 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2000,56(3):541-546
The radical addition reactions of organobromine compounds, XBr (X = CH2COOMe, PhCH2, CHBr2 and CCl3) with cyclohexene afforded mixtures of cis/trans isomer pairs of 1-X-2-Br-cyclohexanes. In addition to benzyl benzoyloxy derivatives are formed also, when benzoyl peroxide is used as an initiator. Owing to the great difficulties in separating these cis/trans isomer pairs, they are identified directly in their mixtures by NMR spectroscopy. In addition to one-dimensional (ID) 1H, proton decoupled 13C and DEPT-135, also two-dimensional (2D) 13C-13C INADEQUATE as well as 1H-13C HMQC experiments have been used in assigning the signals of each compound in their mixtures. The identification of each isomer was based on comparison of experimental 3J(H,H) coupling constants with theoretical ones based on the well-known Karplus type relationship. The more stable conformation for each isomer was estimated using the semiempirical AM1 molecular orbital method. The calculations support the isomer pair elucidations. 相似文献
7.
8.
The fragmentation patterns of the thioacyl derivatives of 2-aminothiazole and 2-aminobenzothiazole and of their ‘fixed structure’ imino and amino tautomeric forms give evidence of the predominance of the imino tautomer in the molecular ions of the trifluorothioacetyl compounds. On the other hand, the M+˙ ions of the thioacetyl and thiobenzoyl derivatives are mainly the amino tautomers. A rearrangement with elimination of RCN and formation of the 2-thiazolothione (2-benzothiazolothione) ion is characteristic for ail the compounds investigated. Additional evidence for the interpretation of the main fragmentation paths is provided by the mass spectra of the N-trideuteromethyl and N-deuterated derivatives, high-resolution mass spectrometry being used to determine the elemental composition of some selected peaks. 相似文献
9.
Desyatov D. D. Batakov I. S. Terentiev D. A. Ekidin A. A. 《Physics of Atomic Nuclei》2020,83(12):1625-1632
Physics of Atomic Nuclei - Approaches to the system of radioactive waste classification in the USA and the Russian Federation were considered. The variety of sources of radioactive waste generation... 相似文献
10.
V.N. Denisov B.N. Mavrin S.N. Polyakov M.S. Kuznetsov S.A. Terentiev V.D. Blank 《Physics letters. A》2012
We use electronic Raman scattering for studying the band structure of the ns boron acceptor states in diamond. For the first time, the spin–orbit splitting of these acceptor states and the 1s→ns Lyman series of transitions are observed. The spin–orbit splitting linearly increases with n number. Lyman series exhibit fine structure consisting of four bands each. The energy spacing between series is equal to ∼13 meV. Evolution of Raman spectra of the boron-doped diamond with increasing boron concentration is shown. Mott transition is revealed in Raman spectrum. Correct values of Luttinger parameters for diamond are specified. 相似文献