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1.
2.
Lushnikov S. A. Kachalova L. A. Verbetsky V. N. Agafonov S. S. 《Crystallography Reports》2020,65(3):433-435
Crystallography Reports - Hydride phases have been synthesized based on ZrMoV and ZrMo1.5V0.5 pseudobinary intermetallic compounds with a cubic structure of С15 Laves phases (sp. gr. Fd$$bar... 相似文献
3.
P. M. Lushnikov 《Journal of Experimental and Theoretical Physics》1998,86(3):614-627
A nonlinear theory is presented for the formation of hexagonal optical structures in a photorefractive medium equipped with
a feedback mirror. Oppositely directed beams in photorefractive crystals are unstable against the excitation of sideband waves.
It is shown here that as this instability evolves to its nonlinear stage, the three-wave interaction between weak sideband
beams does not stabilize it, but rather leads to explosive growth of the amplitudes of beams whose transverse wave vectors
form angles that are multiples of π/3. As a result, sideband beams at these angles are found to be correlated. A range of parameters is found in which four-wave
interactions saturate the explosive instability, which explains the appearance of stable hexagons in the experiment. Outside
this region, nonlinearities of higher order saturate the explosive instability, and the process of hexagon generation must
be studied numerically. Matrix elements are obtained for the three-and four-wave interactions as functions of the distance
to the feedback mirror, and an equation for the time evolution of the sideband wave amplitudes is derived that describes the
hexagon generation. A comparison is made with experimental results for the photorefractive crystals KNbO3 and BaTiO3.
Zh. éksp. Teor. Fiz. 113, 1122–1146 (March 1998) 相似文献
4.
5.
Alan Rigter Jan PM Langeveld Drophatie Timmers-Parohi Jorg G Jacobs Peter LJM Moonen Alex Bossers 《BMC biochemistry》2007,8(1):6
Background
The common event in transmissible spongiform encephalopathies (TSEs) or prion diseases is the conversion of host-encoded protease sensitive cellular prion protein (PrPC) into strain dependent isoforms of scrapie associated protease resistant isoform (PrPSc) of prion protein (PrP). These processes are determined by similarities as well as strain dependent variations in the PrP structure. Selective self-interaction between PrP molecules is the most probable basis for initiation of these processes, potentially influenced by chaperone molecules, however the mechanisms behind these processes are far from understood. We previously determined that polymorphisms do not affect initial PrPC to PrPSc binding but rather modulate a subsequent step in the conversion process. Determining possible sites of self-interaction could elucidate which amino acid(s) or amino acid sequences contribute to binding and further conversion into other isoforms. To this end, ovine – and bovine PrP peptide-arrays consisting of 15-mer overlapping peptides were probed with recombinant sheep PrPC fused to maltose binding protein (MBP-PrP). 相似文献6.
We propose using a nonlinear phase-shift interferometric converter (NPSIC), a new device, for lumped compensation for nonlinearity in optical fibers. The NPSIC is a nonlinear analog of the Mach-Zehnder interferometer and provides a way to control the sign of the nonlinear phase shift. We investigate a potential use of the NPSIC for compensation for nonlinearity to develop a dispersion-managed system that is closer to an ideal linear system. More importantly, the NPSIC can be used to essentially improve single-channel capacity in the nonlinear regime. 相似文献
7.
S. I. Bobrovskii D. E. Lushnikov Yu. G. Bundel' 《Chemistry of Heterocyclic Compounds》1989,25(12):1360-1364
The acylation and carbomethoxylation of 2-methylindolizine were studied. In most cases minor amounts of the 1-substituted isomers were isolated in addition to the usual products of substitution in the 3 position. The data from the PMR and mass spectra of the 2-methyl-3- and 1-acylindolizines obtained are discussed.See [1] for Communication 4.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1634–1638, December, 1989. 相似文献
8.
9.
Metal/superconductor/semiconductor (Ag/Hg-1212/CdSe) hetero-nanostructures have been fabricated using pulse-electrodeposition
technique and are characterized by X-ray diffraction (XRD), full-width at half-maximum (FWHM) and scanning electron microscopy
(SEM) studies. The junction capacitance of Ag/Hg-1212, Hg-1212/CdSe and Ag/Hg-1212/CdSe heterojunctions is measured in dark
and under laser irradiation at room temperature. The nature of the junction formed and built-in-junction potentials were determined.
The increase in carrier concentration across the junction due to photo-irradiation has been observed. 相似文献
10.
A. I. Fedoseev S. G. Lushnikov S. N. Gvasaliya S. Kojima 《Physics of the Solid State》2006,48(6):1102-1105
The behavior of acoustic phonons in crystals of a relaxor ferroelectric, namely, the lead scandium tantalate PbSc1/2Ta1/2O3 (PST), is studied in the vicinity of the diffuse phase transition. The behavior of longitudinal and transverse acoustic phonons in a PST single crystal is examined using Brillouin scattering. The phonon subsystem is found to behave anomalously in the vicinity of T = 297 K, which can probably be assigned to the existence of a phase transition. Analysis of the results obtained yields the values of the elastic moduli C11, C12, and C44 for the cubic phase of the crystal over a wide temperature range. 相似文献