Materials Literature
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It was suggested a new conception of identification of wear intensity of lubricated steel friction surfaces by size and distribut6ion of micromechanical characteristics in thin undersurface level, deformated by friction. Suggested criterion characterize antiwear features of lubrication oils.
In our work we form the principles of organizational and technological design of robotized technological complexes for manufacturing large-scale, non-rigid, spatial structures with great number of short-length welding joints. The algorithm of design process is also considered.
This article provides the analysis of the concept of «sign», gives an overview of main characteristics of «semiosphere», pointes out the ground of misunderstanding of cross-cultural adds; detenmines the types of signes and thein connection.
In the accepted model of formation of chip we were based on hydrodynamical laws, and also on reological appearances taking place during relative movement of particles of the body. Theoretical expressions for definition of pressure on a true rake of the tool were obtained.
The article is devoted to transformation of a course policy of Bank of Russia and introduction of "a basket of currencies " consisting of Euro and US dollar. Since February, 2005 the currency basket is one of major factors of a monetary and credit policy of Bank of Russia influencing on formation of a real rouble exch…
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By using mercaptosuccinic acid-cerium(IV) sulfate and mercaptosuccinic acid-KMnO4 redox systems in acid aqueous medium, the polymerization of acrylamide monomer was performed at room temperatures. Water soluble acrylamide polymers which contain mercaptosuccinic acid end-groups were synthesized. The dependence of polym…
Cladding materials development is crucial to realize highly efficient and high-burnup operation over 100GWd/t of so called Generation IV nuclear energy systems, such as supercritical-water-cooled reactor (SCWR) and lead-cooled fast reactor (LFR). Oxide dispersion strengthening (ODS) ferritic/martensitic steels, which…
The phonon-induced relaxation dynamics of charge carriers in a PbSe quantum dot is studied for the first time by ab initio density functional theory in the time-domain. The picosecond time scale of the relaxation and the absence of the phonon bottleneck are rationalized by relatively high electron and hole state densi…
We have synthesized and structurally characterized the monolanthanide-containing polyanions [Ln(beta2-SiW11O39)2]13- (Ln = La (1), Ce (2), Sm (3), Eu (4), Gd (5), Tb (6), Yb (7), Lu (8)). Synthesis was accomplished by reaction of the respective lanthanide ion with the monolacunary Keggin-type precursor [beta2-SiW11O39…
Thin solid films of salmon deoxyribonucleic acid (DNA) have been fabricated by treatment with a surfactant and used as host for the laser dye sulforhodamine (SRh). The DNA films have an absorption peak at approximately 260 nm owing to absorption by the nitrogenous aromatic bases. The SRh molecules in the DNA films hav…
Dense liquid phases, metastable with respect to a solid phase, but stable with respect to the solution, have been known to form in solutions of proteins and small-molecule substances. Here, with the protein lumazine synthase as a test system, using dynamic and static light scattering and atomic force microscopy, we de…
Large-scale and highly oriented single-crystalline ZnO nanotubes on conductive glass substrates have been realized by a two-step solution approach, which involves the electrodeposition of oriented ZnO nanorods and subsequently coordination-assisted selective dissolution along the c -axis to form tubular structure caus…
Thermoelectric properties of nanostructured skutterudite CoSb3 have been reported. Nanosized CoSb3 powders were synthesized through a solvothermal route. The bulk materials with average grain sizes of 250 and 150nm were prepared by hot pressing and spark plasma sintering from the solvothermally synthesized CoSb3 powde…
In the present study, an ultrahigh-resolution system was applied as a simple and convenient technique to characterize the extent of metal nanoparticle agglomeration in solution and to visualize nanoparticle agglomeration, uptake, and surface interaction in three cell phenotypes under normal culture conditions. The exp…
Anisotropic magnetotransport measurements are reported on ${\mathrm{Fe}}_{1∕4}\mathrm{Ta}{\mathrm{S}}_{2}$ single crystals grown by vapor transport. Both the magnetization and resistivity are extremely anisotropic, with the magnetic moments aligned parallel to the $c$ crystallographic direction. ${\mathrm{Fe}}_{1∕4}\m…
Nanostructuring materials can radically change their properties. Two interesting examples highlighted here are nanoscale porosity inducing biodegradability, and nanoscale confinement affecting the physical form of an entrapped drug. Mesoporous silicon is under increasing study for drug-delivery applications, and is th…
Ar ∕ CH 4 ∕ H 2 gas mixtures have been used to deposit microcrystalline diamond, nanocrystalline diamond, and ultrananocrystalline diamond films using hot filament chemical vapor deposition. A three-dimensional computer model was used to calculate the gas phase composition for the experimental conditions at all positi…
The existence of a large thermoelectric figure of merit in (AgSbTe2)15(GeTe)85 has been known for many years. However, the nature of the crystallographic transformation in these materials from a high-temperature cubic to a low-temperature rhombohedral polymorph and its effect on electrical transport has not been clear…
Course and performance of crystallization of mold flux 37 CaO, 2MgO, 40SiO25Al2O35Na2O, 11CaF2at 1 300 ~ 1 000 °C have tested and studied. Results showed that as cooling rate was ≤2℃／s, crystallization ratio of the flux was 100% ； and as cooling rate was 0. 1 °C/s, dendritic crystal precipitated at first in flux, then…