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91.
S. F. Marenkin V. M. Trukhan K. K. Palkina T. V. Haliakevich S. G. Mikhailov A. V. Molchanov 《Russian Journal of Inorganic Chemistry》2006,51(5):790-793
High-quality ZnSnAs2 (I) single crystals have been grown. The unit cell parameters of compound I have been refined (a = b = 5.8360(1), c = 11.686(2) Å), and its crystal structure has been determined. 相似文献
92.
Kotsyubynskyy D Molchanov S Gryff-Keller A 《Magnetic resonance in chemistry : MRC》2004,42(12):1027-1036
Investigation of 15N NMR spectra of isotopically enriched creatinine has unequivocally shown that in DMSO-d6 solution it exists as amino tautomer (2-amino-1-methylimidazoline-4-one), which in the presence of acid is protonated at N-3. Free energies of activation of the amino group rotation in creatinine and its cation have been determined to be 56 kJ/mol and 60 kJ/mol, respectively, at 298 K, by performing the simultaneous analysis of the lineshapes of -NH2 proton signals in the whole set of 1H NMR spectra recorded at various temperatures and magnetic fields. These results have been theoretically reproduced by the calculations of molecular structures and energies of creatinine and creatininium cation in their ground states and transition states of the amino group rotation, using DFT (B3LYP) method, involving the influence of the solvent. 相似文献
93.
The results of a calorimetric investigation of a glass-reinforced textolite in uniaxial tension are presented. The specimens were deformed on the interval of strain rates from 0.3 to 10.5 mm/min at test temperatures from –30 to 80°C. The thermal effects are shown to depend on strain rate and test temperature.Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 4, pp. 599–604, July–August, 1971. 相似文献
94.
95.
S. P. Molchanov V. I. Roldughin I. A. Chernova-Kharaeva G. A. Yurasik 《Colloid Journal》2016,78(5):633-640
Experiments have been performed on the formation of ding-shaped deposits upon the evaporation of dispersion droplets on different substrates accompanied by the coffee ring effect. The main attention has been focused on studying the structure of a formed deposit as depending on the initial contact angle of a droplet. It has been established that the deposit structure may vary from ring-shaped to disc-shaped with a decrease in the contact angle. For certain systems, as the initial contact angle is varied, the scenario of droplet evaporation may change and, in some cases, acquire a combined character. Before the onset of pinning, menisci of droplets that are evaporated on modified polymer substrates may initially move not only toward the droplet center, but also in the opposite direction. 相似文献
96.
O. A. Alekseeva M. K. Blomberg V. N. Molchanov I. A. Verin N. I. Sorokina T. Yu. Losevskaya V. I. Voronkova V. K. Yanovskii 《Crystallography Reports》2001,46(4):642-646
The structure of a K0.96Ti0.96Nb0.04OPO4 single crystal was established by the methods of the X-ray diffraction analysis. Additional positions of K atoms were established. In the superionic state, these atoms provide ionic transport in the crystals. 相似文献
97.
An acousto-optic tunable filter that is insensitive to the polarization of incident light is studied both theoretically and experimentally. The fundamental possibility of designing an acousto-optic filter of nonpolarized light is demonstrated. The filter operates in the visible range of electromagnetic waves with λ=480–750 nm and provides a high spatial and temporal resolution. The number of resolvable spots of the filtered image reaches a value of 400×400 with the spectral bandwidth of the device being Δλ=1.7 nm. The results of the processing of optical images formed by arbitrarily polarized light beams are discussed. An acousto-optic filter based on a TeO2 crystal can be used in optics and spectroscopy in the processing of light beams with an arbitrary polarization, as well as in analyzing optical images formed by light beams whose polarization varies with time. 相似文献
98.
Sulyanova E. A. Molchanov V. N. Verin I. A. Sulyanov S. N. Sobolev B. P. 《Crystallography Reports》2009,54(3):516-525
Crystallography Reports - The crystal structure of the ordered phase Sr4Lu3F17 prepared by directed crystallization of the melt has been investigated. The crystals have a trigonally distorted... 相似文献
99.
We study the expansion of a rocket exhaust plume in the direction perpendicular to the rocket motion. We compare numerical
calculations with a self-similar approximation for a strong cylindrically symmetric explosion and show that, if the rocket
velocity V
∞
is high enough and exceeds the sum of the exhaust gas velocity V
e
and the sound velocity V
s
(V
∞
> V
e
+ V
s
), a gasdynamic hole may be formed for a short time around the rocket flight trajectory in the upper atmosphere, where the
plume-gas concentration is less than the ambient-gas concentration at a given altitude. We calculate the density and temperature
profiles of the transversal plume expansion. 相似文献
100.
I. A. Bassina Yu. P. Malkov O. N. Molchanov S. G. Stepanov G. A. Troshchinenko I. M. Zasypkin 《Thermophysics and Aeromechanics》2014,21(2):249-254
Thermodynamic studies of the converter characteristics were performed to produce hydrogen-containing syngas from hydrocarbon fuel (kerosene) with its separated supply for thermo-oxidative and steam reforming. It is demonstrated that the optimal conditions of the converter performance correlate with the oxidant ratio of α > 0.5 at the heattransfer wall temperature of 1200 K. Hydrogen content in the final syngas reaches 60 % by volume, free carbon (soot) deposition in reforming products is excluded, and there is no need to apply walls water cooling in the converter. 相似文献