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排序方式: 共有237条查询结果,搜索用时 31 毫秒
1.
Ezubchenko I. S. Chernykh M. Ya. Mayboroda I. O. Trun’kin I. N. Chernykh I. A. Zanaveskin M. L. 《Crystallography Reports》2020,65(1):122-125
Crystallography Reports - The effect of trimethylaluminum preflow time on the crystalline quality of AlN films grown by metalorganic chemical vapor deposition on Si(111) substrates has been... 相似文献
2.
Mayboroda I. O. Kolobkova E. M. Grishchenko Yu. V. Chernykh I. A. Zanaveskin M. L. Chumakov N. K. 《Crystallography Reports》2021,66(3):520-524
Crystallography Reports - The formation of β-Si3N4 for subsequent growth of AlGaN and GaN heterostructures of silicon wafers has been studied. It is established that the native oxide layer... 相似文献
3.
Oleksandr P. Demchuk Bohdan V. Bobovskyi Bohdan V. Vashchenko Dr. Oleksandr V. Hryshchuk Artem Skreminskyi Dr. Anton V. Chernykh Dr. Viktoriia S. Moskvina Dr. Olga V. Hordiyenko Prof. Dr. Dmitriy M. Volochnyuk Prof. Dr. Oleksandr O. Grygorenko 《European journal of organic chemistry》2023,26(24):e202300292
Synthesis and physicochemical characterization of all possible cis- and trans-1,3-disubstituted cyclobutane-derived amines and carboxylic acids bearing mono-, di- and trifluoromethyl groups at the C-3 position is disclosed. Tetramethylammonium fluoride (TMAF)- or morpholinosulfur trifluoride (Morph-DAST)-mediated nucleophilic fluorination of appropriate cis- and trans-diastereomeric substrates was used as the key step for the preparation of CH2F- and CHF2-substituted derivatives. To obtain the corresponding cis- and trans-isomeric CF3-substituted derivatives, resolution of known 3-(trifluoromethyl)cyclobutanecarboxylic acid (obtained as a mixture of diastereomers) was applied. The proposed procedures were suitable for the preparation of corresponding fluoroalkyl-substituted cyclobutane-derived amines and carboxylic acids on up to 50 g scale. All 12 building blocks obtained were characterized by measuring dissociation constants (pKa) and lipophilicities (LogP, for model derivatives) to evaluate the effect of the fluoroalkyl substituents on their physicochemical properties relevant to further drug discovery applications. 相似文献
4.
Using a series of mathematical models based on the closed Karman-Howarth equation, the numerical modeling of the dynamics of homogeneous isotropic turbulence was carried out. Computational results agree with known experimental data. Mathematical models are compared. 相似文献
5.
O. I. Shipilova A. O. Khoroshikh A. A. Kolomyltsev A. A. Chernykh V. L. Papernyj N. A. Ivanov 《Bulletin of the Russian Academy of Sciences: Physics》2016,80(1):32-34
The characteristics of LiF films containing Ag nanoparticles prepared via vacuum thermal deposition and magnetron sputtering, and then painted in microwave discharge plasma, are investigated. It is shown that simple and freely available ion-plasma technologies allow us to obtain nanosized LiF layers promising for use in photonics. 相似文献
6.
I. V. Chernykh I. V. Lukiyanchuk V. S. Rudnev P. M. Nedozorov L. M. Tyrina A. Yu. Ustinov 《Russian Journal of Applied Chemistry》2013,86(3):319-325
CuO+M x O y /TiO2+SiO2/Ti composites (M = Mn, Fe, Co, Ni) were produced by plasma-electrolytic oxidation and impregnation, followed by annealing. The elemental and phase composition of these composites were examined and their activity series in CO oxidation was determined. 相似文献
7.
A. A. Shemukhin Yu. V. Balakshin P. N. Chernykh V. S. Chernysh 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2013,7(2):318-321
An experimental setup for medium energy ion scattering spectroscopy allowing materials elemental composition diagnostics has been developed. A target composed of single-crystalline Ge with a smooth surface and structural inhomogeneity several nanometers thick has been prepared for conducting the experiments. Experiments have shown that the depth resolution of the method was 6 Å. 相似文献
8.
The plane unsteady problem on evolution of the local mixed fluid region in a pycnocline is considered. Results of computations
using stationary (fixed) inhomogeneous and orthogonal moving grids are presented. 相似文献
9.
Linear and nonlinear numerical models of dynamics of local density perturbation in a stably stratified medium are constructed.
The influence of viscosity on the process of generation and propagation of internal waves generated by the local density perturbation
in a pycnocline is evaluated. The problem on the dynamics of local density perturbation in the presence of wave background
is considered. 相似文献
10.
A numerical model of the dynamics of turbulence and temperature fluctuations behind a heated grid located in a wind tunnel
is constructed on the basis of closed Kármán-Howarth and Corrsin equations. Results calculated by this model are in reasonable
agreement with available experimental data.
__________
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 50, No. 3, pp. 118–126, May–June, 2009. 相似文献