Materials Literature
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We investigate the propagation of temperature perturbations in an array of coupled nonlinear oscillators at finite temperature. We evaluate the response function at equilibrium and show how the memory effects affect the diffusion properties. A comparison with nonequilibrium simulations reveals that the telegraph equat…
Epoxidized soybean oil at various concentrations was cured with amine curing agent. The prepared matrices were chemically modified with three types of bismaleimides, namely N, N ′ -bismaleimido4,4 ′ -diphenylmethane (BMI-1), 1,3-bis(maleimido)benzene (BMI-2) and 3,3 ′ -bis(maleimidophenyl) phenylphosphine oxide (BMI-3…
Abstract The synthesis and characterization of a series of nematic SWNT‐polyazomethine composites are described. The composites were prepared by in situ polymerization in the presence of 1 wt % of chemically modified SWNTs in such a way that they were either dispersed or covalently bonded to the polymeric matrix. The…
Abstract The dependence of humidity adsorption in porous silicon (PS) layers on the fabrication conditions (current density and oxidation) has been investigated. As‐prepared and additionally oxidized PS layers have been investigated using physical gas (N 2 ) adsorption measurement at 77 K, water vapor adsorption measu…
First-principles calculations predict that, in the antiferromagnetic state, ${\text{Ho}}_{5}{\text{Ge}}_{4}$ should adopt a unique monoclinic structure with an unusual distortion in the $ac$ plane, making it a unique member of a broadly researched ${R}_{5}{T}_{4}$ family of compounds that are best known for their gian…
We report the results of an experimental study of a colloid fluid confined to a quasi-one-dimensional (q1D) ribbon channel as a function of channel width and colloid density. Our findings confirm the principal predictions of previous theoretical studies of such systems. These are (1) that the density distribution of t…
The semiconductor CdS is generally found in the wurtzite structure. Prior experimental and theoretical results confirm that the semiconductor CdS nanoparticles maintain a wurtzite structure for diameters greater than 6 nm. There is disagreement in the literature for sizes smaller than 6 nm. We use the density-function…
Abstract Relaxations in chitin have been investigated in the temperature range 298–523 K using impedance spectroscopy in the frequency range 10 −1 –10 8 Hz. The objective was to detect a glass‐transition temperature for this naturally occurring, semicrystalline polysaccharide. The impedance study was complemented with…
Abstract Polypyrrole/polyacrylonitrile, polyaniline/polyacrylonitrile, and poly(3,4‐ethylenedioxythiophene)/polyacrylonitrile composite fibres were fabricated successfully by in situ polymerization. The morphologic observations confirmed the uniformly‐covered polyacrylonitrile fiber surface by conductive conjugated po…
NMR spectroscopy was applied for quantitative and qualitative characterization of the chemical composition and microstructure of a series of poly(3-hydroxybutyrate-co-3-hydoxyvalerate) copolymers, P(3HB-co-3HV), synthesized by mixed microbial cultures at several different feeding strategies. The monomer sequence distr…
Vanadium chloromethoxide was prepared by the methanolysis of VCl 4 . The addition of water with a H 2 O:vanadium molar ratio ranging between 0 and 16 changed the solution color from green to deep blue at a rate increasing with water concentration. UV−vis, Fourier transform infrared, Raman, and electron paramagnetic re…
Abstract In this article, the chemistry of interfacial adhesion between different additive systems has been dealt with to develop a high performance nanocomposite and in the process, a comprehensive study on the reinforcing effect of nanosilica has been carried out. The base polymer was considered as the blends of Pol…
In the system we consider, a pair of large hard spheres, whose surface separation is fixed at a prescribed value, is immersed in a binary mixture comprising small and medium hard spheres. The density profiles of the medium and small spheres near the large spheres are calculated using the three-dimensional integral equ…
D-3-hydroxybutyrate dehydrogenase from Alcaligenes faecalis catalyzes the reversible conversion between D-3-hydroxybutyrate and acetoacetate. The enzyme was crystallized in the presence of the substrate D-3-hydroxybutyrate and the cofactor NAD(+) at the optimum pH for the catalytic reaction. The structure, which was s…
Abstract In order to understand the contribution of nanoparticle surface area to the properties of nanocomposite materials, hydroxyapatite nanoparticles with different specific surface areas (60 m 2 · g −1 and 111 m 2 · g −1 ) were synthesized using reverse microemulsion and processed into nanocomposites. Experimental…
We present the anomalies at ∼200 K in electrical resistivity, transmittance and reflectance in the far-infrared region, and the magnetic susceptibility of α'-(BEDT-TTF) 2 IBr 2 [BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene]. This phase transition is investigated by infrared, Raman, and far-infrared spectroscopies.…
Thermal electron beam (EB) technologies are becoming more and more attractive especially because they are ecologically friendly and energy saving on the one hand and highly precise, excellently controllable and highly productive on the other hand.Using three-dimensional energy transfer fields, the interaction conditio…
Abstract Composite compounds based on hemp and flax fibers in triethyl citrate plasticized starch acetate were prepared by melt processing. For better properties and processability, compounds with plasticizer contents in the range 20–35 wt% were screened. Composites were prepared with fiber contents up to 50 wt%. The…
The interaction of the PTA (PTA = 1,3,5-triaza-7-phosphaadamantane) ruthenium complex trans-[RuCl(2)(PTA)(4)] (trans-1) with visible light in chloroform and in water has been studied at room temperature. The complex trans-1 isomerizes to the cis isomer in CHCl(3) with radiation of lambda > 416 nm (Phi(434 nm) (CHCl(3)…
Five Chinese coal chars were prepared in a flat flame flow reactor that can simulate the conditions of real pulverized coal combustion. The kinetics of the NO−char reaction at 1273, 1373, 1473, and 1573 K was studied in a drop tube furnace. A new model of the high-temperature NO−char reaction that took into account th…