Materials Literature
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Exciplex formation dynamics of photoexcited copper(II) tetrakis (4‐ N ‐methylpyridyl) porphyrin (Cu(II)(TMpy‐P4)) with added poly(dA‐dT) 2 and poly(dG‐dC) 2 has been investigated by using femtosecond transient absorption and nanosecond and picosecond transient Raman spectroscopic methods. It was observed that the deca…
The characterisation of the local structure of disordered materials is one of the major applications of x-ray absorption fine structure (XAFS) spectroscopy. XAFS site sensitivity has been widely exploited to describe the radial distribution around specific types of atoms in multicomponent systems such as doped borate…
The first-order Raman spectra of Eg (2) (186cm-1) and Eg (4) (1385cm-1) modes in NaNO3 crystal were measured in the temperature range of 77-473 K and the linewidths at these temperatures were obtained. The temperature dependence of the linewidths was analyzed using the phonon dispersion curves calculated on the basis…
The effect of porosity on the elastic constants for X-ray stress analysis in sintered alumina was analyzed on the basis of four micromechanics models: Reuss' model, Voigt's model, Mori-Tanaka's model (MT model) and Self-consistent model (SC model). The X-ray elastic constant E'X/(1+v'X(E'X=Young's modulus, v'X=Poisson…
"This paper presents a study of porous silicon layer of » 1 mm thickness, formed electrolytically in crystalline p-Si, by Xray diffraction at grazing incidence, photoluminescence (PL) at 6 K and room temperature, C-V measurements, and charge version of deep level transient spectroscopy (DLTS). The C-V measurements per…
We have investigated magnetization and magnetic anisotropy in Ni/Pd multilayer films, prepared by dc magnetron sputtering at 7 mTorr Ar sputtering pressure. Interestingly, enhanced magnetization was found in this system, due to the polarization of Pd. Delicate in situ stress and ex situ magnetostriction measurements w…
The microscopic Ising-like model of the order-disorder phase transition in improper ferroelastic crystals is presented. For such a system, the spin-strain coupling can be written in terms of four-spin interactions. Three-dimensional Monte Carlo simulation shows that for a certain strength of the four-spin interaction…
This paper has reported on the development of an accurate finite element model of an induction motor suffering from rotor faults. The model has been used to provide a clearer understanding of how such faults are manifest in the line current and should therefore aid the development of more accurate condition monitoring…
A model is described for the densification of particulate reinforced ceramic matrix composites when the degree of shrinkage is large. A rule of mixtures model can be used to describe the degree of densification in cases where there is no interfacial reaction between the reinforcement and the matrix. The model is illus…
There has been much recent discussion on the issue of the deposition and release of macromolecular structural data [see editorials in Nature, 391, 617 (1998) and Nature Structural Biology, 5, 83±84 and 165±166 (1998) and the letter from Wlodawer et al. in Science, 16 January 1998]. These editorials and letters rightly…
In order to clarify wire diameter dependency of corrosion rate of steel wires, which have been widely used in various fields, immersion tests and polarization tests in pH 5.9 and pH 2.5 NaCl solutions were conducted to high carbon steel wires with 0.1 to 1.0mm in diameter. It was found that the corrosion rate was larg…
An improvement of methods in fibroin hydrolysates preparation significantly enlarges their applications to practical use. Acidic hydrolysis by hydrochloric acid is one of the methods for silk fibroin depolymerization. A low yield of final product and long time of the process are the demerits of this method. Possibilit…
Cleansers for the human skin are characterized by their delipidizing, dehydrating and protein-influencing effects. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Crystallization behavior of synthetic cis-1, 4 polyisoprene (IR), mixed with 0.4×10-2mol/kg_??_4.8×10-2mol/kg saturated fatty acid, was investigated by dilatometry at -25 and -15°C. The crystallization of IR was abruptly promoted by the addition of saturated fatty acids higher than 1.0×10-2mol/kg, such as stearic acid…
Effects of alloying of Al and Si on anodic polarization of Fe-10Cr alloys have been studied in order to assess the possibility of obtaining a lower Cr content stainless steel. Experimental mesurements have been made on anodic polarization curves in 0.05-1.0 kmol·m−3 H2SO4 aqueous solution, pitting potentials in 3.5%Na…
Some series of novel nematic liquid crystalline tolans having high birefringence and low viscosity with a high NA (Nematic-to-Isotropic) transition temperature were developed in order to improve the response time of Supertwisted Nematic-Liquid Crystal Display (STN-LCD). Some nematic liquid crystalline mixtures of the…
Based on a solute atoms diffusion model, contribution from soluble nitrogen to the high-temperature strength was numerically examined for ferritic heat-resisting Fe-Cr-N and Fe-Mo-N alloys. The solute distribution around a moving dislocation was determined by simulating the jump process of interstitial and substitutio…
Constant-compression speed testing was performed using a 99.999 mass% aluminum polycrystal with a grain size of 1.0 mm at temperatures ranging from 413 to 653 K and initial strain rates ranging from 1.67×10−1 s−1 to 1.67×10−5 s−1. The true stress-true strain curves showed a variation from a single peak type to multipe…
The effects of silicon addition on microstructures and tensile properties for Ti-6Al-4V alloy casting were investigated. And the possibility of microstructure control for Ti-6Al-4V-Si alloys by hot-working was discussed. Fine blocky Ti5Si3 intermetallic compounds were precipitated during solidification and cooling at…
The phonon dispersion relations in a CsH 2 PO 4 crystal in a paraelectric phase by means of a rigid molecular-ion model are calculated. The phonon spectra in the quasi-harmonic approximation at various values of temperature and hydrostatic pressure are obtained. The condensation of A u external phonon branch in the ce…