Materials Literature
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Compression testing of micropillars was used to investigate the gain boundary effect on the strength of metals which is especially interesting in ultra fine grained and nanocrystalline metals. Single and bicrystal micropillars of different sizes and crystallographic orientations were fabricated using a focused ion bea…
Generation of charged nanoparticles in the gas phase has been frequently reported in many chemical vapor deposition (CVD) processes. In an effort to confirm whether charged nanoparticles are generated during the synthesis of silicon films by CVD, a differential mobility analyzer combined with a Faraday cup electromete…
The ion and proton transfer numbers were measured by emf method in La1 − x Sr x Sc1 − y Mg y O3 − α (x = y = 0.01–0.20) system in reducing hydrogen-containing atmosphere in the range of temperatures from 630 to 920°C and pH2O from 0.61 to 2.65 kPa. Total ionic, proton, and oxygen conductivities of this system was meas…
Diamondoid molecules were synthesized from adamantane (C 10 H 16 ) using low-temperature plasmas generated in supercritical xenon. The carbon content of the synthesized materials was verified by energy dispersive X-ray spectroscopy, while micro-Raman spectroscopy measurements confirmed that the synthesized materials c…
X-ray photoelectron spectroscopy (XPS) is a promising technique employed for the study of conducting polymers and their composites. XPS was used to study the surface chemistry of polyaniline-mixed cellulose ester (PANI-ME) composite membranes prepared by various chemical oxidative polymerization techniques such as ins…
Ichthyosis vulgaris is an inherited disorder of keratinization that results in asteatotic scales on extensor surfaces of the arm, legs, and trunk. A combination-therapy approach with a physiological lipid-based barrier repair topical emulsion and ammonium lactate 12% lotion applied topically was shown to be effective…
Fibre reinforced composites have gained use in a variety of applications. The performances of these composites may suffer when the material is exposed to adverse environments for a long period of time. Kenaf fibre reinforced unsaturated polyester composites were subjected to water immersion tests in order to study the…
Breakdown lifetime for treeing is enormously extended for polymers when they are doped with nano fillers. It includes a budding process and a growing process. The latter process is mainly determined by erosion due to partial discharge attack, and thus suppressed by existing nano fillers. The former process is not so c…
A giant concentration of nitrogen vacancy defects has been revealed by the electron paramagnetic resonance (EPR) method in a detonation nanodiamond sintered at high pressure and temperature. A high coherence of the electron spins at room temperature has been observed and the angular dependences of the EPR spectra indi…
In this paper an attempt is made to study accurately, the potential and electric field distribution for different types of ceramic disc insulators used for high voltage transmission and distribution systems. The computer simulations are carried out by using a commercially available software package. The potential and…
Previous studies of the surface plasmon resonance (SPR) from alloy nanoparticles of gold and silver have focused on bulk studies of the nanoparticles in solution. Here, we present a selection of data observed from individual alloy nanoparticles using highly spatially resolved electron energy-loss spectroscopy (EELS).…
This work aims at studying the role of interface properties on the rheological behavior of non-compatibilized and compatibilized polymer blends. Blends of polymethylmetacrylate (PMMA) with polystyrene (PS) and PS functionalized with oxazoline (PSOX) with concentrations of up to 20 w/w of the dispersed phase were used.…
This paper reports possible applications of microvaristor filled silicone rubber at composite insulators. Different insulator variations fitted with microvaristor filled sheds or shanks have been investigated. The insulators are dimensioned for Um= 170 kV and Um= 420 kV. Different variations of the 420 kV type were te…
Lactivicin (LTV) is a natural non-beta-lactam antibiotic that inhibits penicillin-binding proteins and serine beta-lactamases. A crystal structure of a BS3-LTV complex reveals that, as for its reaction with PBPs, LTV reacts with the nucleophilic serine and that cycloserine and lactone rings of LTV are opened. This str…
We conducted dynamic viscoelastic and birefringence measurements for dynamically homogeneous mixtures, polystyrene (PS)/4-pentyl-4′-cyanobiphenyl (5CB), to examine the orientational coupling between PS segments and 5CB molecules. It was also investigated whether dynamic homogeneity was correlated with orientational co…
Abstract A review is given on the effect of neutron irradiation on the microstructure and properties of Zr–Nb and Zr–Nb–Fe (Sn,O) alloys. The in-reactor performance of Zr alloys is dependent on their composition and microstructure, and even small changes in the composition and processing lead to substantial changes in…
Highly stable eta(2)-porphyrin Ru(II) pi complexes have been synthesized. The formation of the eta(2) pi bond has been facilitated through pi-pi stacking interactions between the porphyrin and the planar ligand on Ru. pi coordination of ruthenium to porphyrin results in dramatic changes in the aromaticity and electron…
Nephrogenic systemic fibrosis (NSF) is a recently described, debilitating systemic disease most commonly seen in patients with renal insufficiency. Exposure to gadolinium-containing contrast agent has been associated with the onset of symptoms. The epidemiology, pathogenesis, clinical manifestation, diagnosis, histolo…
Introduction. Rhizopus stolonifer is the causal agent of Rhizopus rot disease in various fruit and vegetables. Materials and methods. The effect of chitosan was evaluated in vitro on mycelial growth, sporulation, morphological characteristics and germination of spores of three isolates of R. stolonifer (from peach, pa…
It is shown by microindentation that the defect structure of nanocrystalline titanium obtained by rolling at low temperature is quite uniform. The presence of texture was manifested as a small difference of the average values of the hardness H¯V and the standard deviation in the measurements in the roll plane and in a…