Materials Literature
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Theoretical studies were conducted for thickness measurements using transparent substrates on the external and internal reflection configurations. For three-phase systems consisting of ambient, film, and substrate, the refractive index of the substrate could be optimized to obtain the high sensitivity of an ellipsomet…
Diesel soot powder generated under idle and load engine conditions was pressed into pellets at pressures ranging up to approximately 8.5 GPa. Soot powder was also immersed in acetone in order to obtain soot aggregates without agglomeration. Small-angle x-ray scattering was carried out on the powder, the pellets, and o…
New mesogens are always a source of interest, especially when they possess a non‐conventional architecture. In this article are presented the synthesis and polymorphism of a series of compounds possessing a 1,4‐diaryl‐1‐buten‐3‐yne moiety as the rigid core with an alkoxy chain on each side. Such a core is termed an en…
Magnetic annealing at 800 °C for 3, 15 and 30 minutes was conducted to evaluate the effect of a 17T magnetic field on the microstructure formation of cold rolled Fe-0.75 %Si samples. According to texture measurements magnetic field did not seem to significantly affect the development of grains with Goss orientation, h…
Stents are one method of treatment for stenosis of lumens organ from various causes. The cylindrical metallic stents are composed of alloy wire. After stents are implanted, however, the stenosis may recur due to a tumor or abscess again. It is particularly difficult to remove tumors or abscesses of the bile duct by su…
Bazhenovite was originally reported as a rare, thiosulfate-containing mineral, with the chemical formula CaS 5 ⋅CaS 2 O 3 ⋅6Ca(OH) 2 ⋅20H 2 O. The structure was predicted to be layered, but no structural details were given. A crystal of “bazhenovite” from the pyritized siderite fragments occurring in the melt products…
To study the temperature-dependent structural changes accompanying the phase transformation leadhillite ↔ susannite and to verify the close structural relationships between heated leadhillite and susannite, a leadhillite crystal has been investigated by X-ray single-crystal diffraction methods within the temperature r…
Variations in the thermopower, electrical resistivity, magnetoresistance, thermal expansion coefficients, and their anisotropy with temperature were detected near room temperature in single crystals of weakly doped lanthanum manganites La 1− x A x MnO 3 ( A = Ca, Sr; x = 0.07–0.125) with orthorhombic structure. The re…
The present experiment demonstrates a systematic morphosynthesis of calcium phosphate crystals with controlled morphology in reverse micelles solution of CTAB/n‐pentanol/water/cyclohexane. Well‐defined morphologies of calcium phosphate particles, such as nanowires, tablets, brushlike particles, and fiber bundles, can…
Abstract— Many of the films used in polarizer assemblies in LCDs ( e.g. , triacetyl cellulose or TAC) are produced by a solvent‐casting process, which is known to impart optical anisotropy to the film expressed as finite out‐of‐plane birefringence. This feature of the film could have a significant impact on the optica…
The effect of hydrogenation on the magnetic ordering temperature and magnetostriction of the Tb0.27Dy0.73Fe2 and Tb0.27Dy0.73Co2 compounds with compensated magnetic anisotropy of the rare-earth sublattice was studied. It was established that the incorporation of hydrogen atoms into the crystal lattice of the compounds…
A systematic dielectric study over a frequency range of 100 Hz up to 100 k Hz was carried out on some poly(alkyl methacrylate)s: poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), and poly(butyl methacrylate) (PBMA) blended with polyvinylpyrrolidone (PVP). The compatibility investigation, which was tes…
A generalized mathematical model has been developed for predicting the strength of spun yarns produced by ring, rotor, air-jet and open-end friction spinning systems. The model is based on the translation of fiber bundle tenacity into the yarn tenacity and it is applicable to all spun yarns. The model describes the fa…
The bending moment-curvature relation was derived for generalized elliptical cross-section fibers made of nonlinear material and particular values were found to agree with those already obtained for elliptical cross-section and rectangular cross-section. The bending shape factors, the relation between bending rigidity…
Bu çalışmada, zımparalanmış ağaç malzeme yüzey pürüzlülüğüne kesiş yönü ve zımpara çeşidinin etkileri araştırılmıştır. Bu maksatla, ülkemizde yetişen akasya (Robinia pseudoacacia L.), armut (Pirus communis L.), kestane (Castanea sativa Mill.), sapsız meşe (Quercus petraea Lieble) ve Toros sediri (Cedrus libani A. Rich…
The properties of NiO nanopowders prepared by electrical explosion of a wire in an oxygen-containing atmosphere are presented. Most of the NiO nanopowders are found to be oxygen-enriched, the excess of oxygen depending mainly on the nickel vapor concentration. The dependences of the powder particle size on the oxygen…
This work compares three electrochemical techniques, linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and electrochemical noise (EN), used in the study of corrosion of X52 steel samples in an environment containing a culture of sulfate reducing bacteria (SRB). The study emphasizes the…
The inhmogenmus non-equilibrium molecular dynamics (NEMD) scheme is applied to model phonon heat conduction in thin nickel films. The electronic contribution to the thermal conductivity of the film is deduced from the electrical conductivity through the use of the Wiedemann-Fmnz law. At the average temperature of T= 3…
The intrinsically conducting polymer (ICP), polyaniline (PANI) is synthesized by chemical oxidative polymerization process with the help of water soluble support polymer poly-vinyl alcohol (PVA). The field dependence of the dielectric response is measured in the frequency range 50 Hz-1 MHz and temperature range 140-31…
Abstract Of all the known pillared layered clays (PILC), Al-PILC is the most studied. In spite of that, its use on a commercial scale is not yet possible due to the large amount of water required for its synthesis. The aim of the present work was to take advantage of the beneficial effects of ultrasound radiation for…