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21.
N. T. Denisov S. A. Mironova N. I. Shuvalova A. E. Shilov 《Russian Chemical Bulletin》1998,47(10):2025-2027
The reduction of CO by the nitrogen-fixing systems Ti(OH)3−Mo(OH)3 and MgTi2O4−Mo(OH)3 was studied in aqueous and water-methanol media; in the latter,14CO was used as the reagent. The main reaction product is methanol, whose yield in the H2O−MeOH−KOH mixture is almost an, order of magnitude higher than that in an aqueous alkaline solution. The data obtained were
compared to those for the reduction of N2
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10 pp. 2081–2083, October, 1998. 相似文献
22.
O. A. Zalevskaya E. G. Vorobieva I. A. Dvornikova I. N. Alekseev E. V. Mironova D. B. Krivolapov I. A. Litvinov A. V. Kuchin 《Russian Journal of Coordination Chemistry》2011,37(3):211-214
The reaction of (1R,2R,5R)-3-[{2-[(2-hydroxybenzylidene)amino]ethyl}imino]-2,6,6-trimethylbicyclo[3.1.1]heptan-2-ol with lithium tetrachloropalladate was studied. A chiral palladium(II) complex was thus obtained and its structure was confirmed by NMR spectroscopy and X-ray diffraction analysis. 相似文献
23.
We consider a solution to the phase problem in optics as applied to registering and analyzing amplitude-phase structures of 1) d optical fields that form or transfer images and 2) transfer or spread functions of the medium where optically inhomogeneous fields propagate or those of the systems forming fields and producing distortions. The influence of the medium is characterized by the modulation function and is described by the operation of multiplication. In order to measure the amplitude and phase field characteristics and transfer or spread functions, we use an original development of the modulation-spectral method proposed earlier by the authors. There are two variants of optical schemes considered. They include identical parts designed to form the light field to be processed. Using the first optical system, one forms the spectrum of spatial frequencies and introduces the first additional space modulation in the plane of spatial frequencies. The second optical system is placed in the same plane to form the image of the investigated field in the input plane of the developing scheme after passing the transmitting medium. In the first variant, the second part of the scheme contains at the input the third optical system forming the spatial spectrum in the registration plane. At the input of this scheme, the second additional spatial modulation is introduced. In the second variant, the third optical system forms the image of the developing scheme input plane in the registration plane. The second additional spatial modulator is placed in the spatial frequency plane of the third optical system. In the output, in both cases four independent two-dimensional intensity distributions are registered, which allow one to solve the formulated problem. 相似文献
24.
A simple method for determining and subsequent eliminating geometrical distortions, including chromatic aberrations, introduced by an imaging system is described. A virtual calibration object is transferred onto a plane surface and is photographed using a tested optical system. The image is compared by the correlation method with digital original matched with camera angle using projective transformations. 相似文献
25.
The results of an analysis of thermo-gravitational convection in Czochralski single-crystal growth from a melt under periodic temperature field conditions are presented. The numerical modeling is based on solving the unsteady 3-D Navier-Stokes and heat conduction equations in the Boussinesq approximation. It is shown that using different heating regimes for the crystal medium provides additional opportunities for controlling heat and mass transfer. 相似文献
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Minzanova S. T. Mironov V. F. Khabibullina A. V. Arkhipova D. M. Mironova L. G. Ryzhkina I. S. Sergeeva S. Yu. Murtazina L. I. Smolobochkina F. R. Milyukov V. A. 《Russian Chemical Bulletin》2019,68(2):405-410
Russian Chemical Bulletin - The formation of stable complexes of pectin polysaccharides with 1-(2-hydroxyethyl)-4,6- dimethyl-1,2-dihydropyrimidin-2-one (Xymedon drug) was shown by UV and IR... 相似文献
30.
V. V. Bakharev A. A. Gidaspov I. A. Litvinov E. V. Mironova 《Journal of Structural Chemistry》2008,49(1):181-184
An X-ray diffraction study of 2-methoxy-4-pyrrolidinyl-6-trinitromethyl-1,3,5-triazine was carried out. The crystals are triclinic;
C9H11N7O7; M = 329.25; a = 8.536(1) Å, b = 9.378(2) Å, c = 9.7401(8) Å; α = 79.13(1)°, β = 73.974(8)°; γ = 72.76(1)°; V = 710.8(2) Å3, d
c = 1.54 g/cm3, Z = 2, space group P1ˉ. The molecule on the whole is planar, except the pyrrolidine ring, which has a twist conformation. No significant π-π interactions and hydrogen bonds of C-H⋯N or C-H⋯O type were found in the crystal, and the
molecule packing is stabilized only due to van der Waals interactions.
Original Russian Text Copyright ? 2008 by V. V. Bakharev, A. A. Gidaspov, I. A. Litvinov, and E. V. Mironova
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Translated from Zhurnal Strukturnoi Khimii, Vol. 49, No. 1, pp. 187–189, January–February, 2008. 相似文献