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排序方式: 共有393条查询结果,搜索用时 46 毫秒
31.
K.R. Allakhverdiev M.A. Nizametdinova E.Yu. Salaev R.M. Sardarly N.Yu. Safarov E.A. Vinogradov G.N. Zhizhin 《Solid State Communications》1980,36(6):527-532
The lattice vibration spectra of TlS and TllnSe2 crystals were investigated by infrared reflectivity in the wavenumber range from 20 to 5000 cm?1. The frequencies of K = 0 phonons were determined by Kramers-Kronig analysis of the spectra. All five infrared active lattice vibrations predicted by the group theoretical analysis were identified. The normal coordinates of vibrations for five infrared active phonons were determined. In the approximation which does not take into consideration long range Coulomb interaction values of the force constant and effective changes are obtained for TlSe, TlS and TllnSe2 crystals. 相似文献
32.
Teruyuki Hakoda Muhammed Alamgir Zaman Chowdhury Akihiko Shimada Koichi Hirota 《Plasma Chemistry and Plasma Processing》2009,29(6):549-557
The decomposition of dimethyl sulfide (DMS) at initial concentrations of 4.5–18.0 ppmv in air was studied under electron-beam
(EB) irradiation. Doses to decompose 90% of input DMS were 2.5 kGy for 4.5 ppmv, 3.4 kGy for 10.6 ppmv, and 3.9 kGy for 18.0 ppmv.
HCOOH, (CH3)2SO, and trace CH3OH and (CH3)2SO2 were produced as irradiation products in addition to CO2 and CO. Application of an O3 decomposition catalyst to an irradiated sample gas led to an enhancement in the oxidation of DMS and its products into CO2 and the decomposition of O3. For 10.6 ppmv DMS/air, the mineralization ratio increased from 41% via only EB irradiation to 100% via the combination treatment
at 6.3 kGy. The yield of CO2 to COx increased from 5.3 to 87.6% by combination with catalytic oxidation. This combination treatment enables the irradiation energy
used to deodorize gas streams containing DMS to be reduced. 相似文献
33.
Summary Love wave travelling in a layer of uniform thickness overlying a half-space is assumed to be incident on two parallel but
staggered perfectly weak half-planes lying in the upper layer. The diffracted field is calculated using the modified Wiener-Hopf
technique and contour integration method. The diffracted waves satisfy the dispersion relations appropriate to different regions
formed by the perfectly weak half-planes.
To the memory of M. H. Kazi 相似文献
34.
B. I. Zaslavskii R. A. Safarov 《Journal of Applied Mechanics and Technical Physics》1973,14(5):624-629
On the basis of experimental observations and theoretical analysis of flow structure in the neighborhood of the triple point, it is shown that one should reject the condition for equality of the angle of deflection of flows passing through the Mach front and the two other fronts and replace it with some supplementary condition. The system of consistency equations in the indicated region is closed by an equation which is obtained under the assumption of the extremality of the deflection angle of a flow passing through the incident and reflected fronts. Calculations of the pressure drops behind the shock fronts agree with experimental data in this case.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 5, pp. 26–33, September–October, 1973.The authors thank S. A. Khristianovich for consideration of the work and advice. 相似文献
35.
36.
M. A. Kukaniev M. M. Akbarova Z. G. Sangov S. S. Safarov D. M. Osimov 《Chemistry of Heterocyclic Compounds》2010,46(5):605-607
A one-reactor method has been developed for the synthesis of 3-methyl-6-R-6H-thiazolo[4,3-b]-1,2,4-triazolo[4,3-d]-1,3,4-thiadiazoles
by the condensation of aromatic aldehydes, thioglycolic acid, and 4-amino-5-methyl-1,2,4-triazole-3(2H)-thione in a sulfuric
acid medium. 相似文献
37.
Mohammad Zaman Kassaee Hassan Masrouri Farnaz Movahedi Reza Mohammadi 《Helvetica chimica acta》2010,93(2):261-264
An efficient solvent‐free method for the synthesis of various 3,4‐dihydropyrimidin‐2(1H)‐ones using TiO2 as a recyclable heterogeneous catalyst is described. Compared to known methods, satisfactory results are obtained with excellent yields, short reaction times, and simplicity in the experimental procedure. 相似文献
38.
Annagiev M. Kh. Safarov R. S. Adygezalov Kh. M. Yagubov A. I. 《Russian Journal of Applied Chemistry》2010,83(1):171-173
The modified forms of bentonite are formed by treating it with salts of various metals. Their nature, force and molecule number
per 1 cm2 are investigated. Also quantity of basic centers on their surface was determined by phenol adsorption. 相似文献
39.
Muminov A. T. Muminov T. M. Norboev K. Osmanov B. S. Salikhbaev U. S. Safarov A. N. Skvortsov V. V. Suleymanov R. D. 《Technical Physics》2011,56(9):1345-1352
Scattering of bremsstrahlung electron beam (E
e
= 6.25 MeV) collimated with a vertical divergence δγ ≈ ±60 μrad and incident on the mercury surface at glancing angles α = −37, −83, and −140 μrad is studied on the 118-m-long
path length. The specular reflection effect is detected in the spectral and angular distributions of γ quanta with energies
up to 3 MeV. The reflection coefficients vary from 0 to ∼17% depending on the angles of incidence and the γ quanta energy. 相似文献
40.
M. R. Zaman 《Journal of Radioanalytical and Nuclear Chemistry》1999,240(2):691-692