Materials Literature
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We report on the magnetic properties and electronic structure of ${\mathrm{Cu}}_{2}\mathrm{CrAl},$ and ${\mathrm{Fe}}_{x}\mathrm{TiSn},$ ${\mathrm{Fe}}_{2\ensuremath{-}x}{\mathrm{Ni}}_{x}\mathrm{TiSn},$ and ${\mathrm{Fe}}_{2\ensuremath{-}x}{\mathrm{Co}}_{x}\mathrm{TiSn}$ cubic solid solutions. The analysis of the magn…
Nanocomposites of Ni-Zn with copolymer matrix of aniline formaldehyde in presence of varying concentrations of zinc ions have been studied at room temperature and normal pressure. The absorption spectra of these materialsare recorded by a Hitachi spectro-photometer, model U-3400, in the wavelength range 850-410 nm. Fr…
The complex investigation of copoly(ether-ester) based on poly(butylene terephthalate) (PBT) and poly(tetramethylene oxide) (PTMO) reveals its microphase separated nanodomain structure. Initial morphology includes the stacks of crystalline blocks of α-PBT embedded in amorphous matrix with the different degree of conti…
Dense hot‐pressed β‐Si 3 N 4 blocks were joined using both SiO 2 and SiO 2 ‐Y 2 O 3 powder slurries as bonding interlayers. The assembled specimens (Si 3 N 4 /interlayer/Si 3 N 4 ) were heated in a flowing N 2 atmosphere in the temperature range of 1500°–1650°C. The joining interlayer was clearly distinguished from th…
We report results of controlled devitrification of rare-earth-doped glasses made in order to improve the initial spectroscopic properties of the as-melted glass to obtain crystal-like properties. This study is made to allow the design of reduced-size photonic devices owing to the use of more efficient active materials…
Tetrahydrodipicolinate N-succinyltransferase (DapD) catalyzes the succinyl-CoA-dependent acylation of L-2-amino-6-oxopimelate to 2-N-succinyl-6-oxopimelate as part of the succinylase branch of the meso-diaminopimelate/lysine biosynthetic pathway of bacteria, blue-green algae, and plants. This pathway provides meso-dia…
Poly(ether-esteramide)s with elastic properties were obtained by a palladium(0)-catalyzed carbonylation of telechelic diamines and aromatic diiodides. Microphase separation was evident from differential scanning calorimetry and scanning electron microscopy studies. Dynamic mechanical analyses revealed a typical rubber…
Abstract A novel class of organic‐inorganic polymer hybrids were developed by meltblending up to 50 (v/v) % [about 83 (w/w) %] tin‐based polyphosphate glass (Pglass) and low‐density polyethylene (LDPE) in conventional plastics processing equipment. The creep and recovery behavior of these polymer hybrids at 30°C were…
Variation in the rate of ultrasonic wave propagation in tensile polycrystalline materials has been observed and examined. The regular features exhibited by these phenomena are found to be related to the multiple-stage behaviour of plastic flow curves and to plastic flow localization. It is shown that the observed stra…
The atom movements during the martensitic transformation are described by a combination of two shears: a long-wave primary and a secondary shuffle type shear which occur simultaneously. The primary and part of the secondary shear are equivalent to the Bain distortion, and the rest of the secondary shear corresponds to…
Calcium hexa‐aluminate (CaO·6Al 2 O 3 ) has been prepared from calcium nitrate and aluminum sulfate solutions in the temperature range of 1000°–1400°C. A 0.3 mol/L solution of aluminum sulfate was prepared, and calcium nitrate was dissolved in it in a ratio that produced 6 mol of Al 2 (SO 4 ) 3 ·16H 2 O for each mole…
The isotopically enriched disk samples of 10B4 12C, (10B0.75 11B0.25)4 12C, (10B0.20 11B0.80)4 12C, 10B4 13C, 10B4 (12C0.50 13C0.50), 11B4 (12C0.50 13C0.50), 11B4 12C, 11B4 13C and natural nB4 nC were prepared by the spark plasma sintering method. The thermal diffusivity for each sample was measured by the laser flash…
The kinetics of transient photocurrents in tin-doped a-As2Se3 and a-AsSe films are found to be strongly dependent on the light intensity and temperature, as well as on the glass composition and tin concentration. The experimental results are interpreted in terms of the multiple-trapping model with the photoconductivit…
One of the major product specifications of a crystalline material is the crystal size distribution (CSD). In order to monitor and control the CSD in an industrial crystallization process, on-line sensors are required. Over the years, a number of techniques to measure the CSD have been established. In this paper, three…
A deep analysis of the behavior of transformer winding impedances for high frequencies is performed. The properties of inductance matrices are analyzed, as well as the possibility of making assumptions and their range of validity. The properties of resistance matrices are also analyzed, which has not been made in the…
New liquid crystalline compounds involving intermolecular hydrogen bonding between mesogenic p-n-alkoxybenzoic acids (nABA) (where n denotes the alkoxy carbon number varying from propylto decyl- and dodecyl-) and p-aminobenzonitrile (ABN) are synthesized. The thermal and phase behaviour of these materials is studied b…
The room‐temperature elastic constants of ErVO 4 were considerably smaller than those of isostructural silicate and phosphate analogs. The generally “less‐rigid” crystalline lattice and weaker metal‐oxygen bond‐strength in the RVO 4 (R = rare earth elements) phases indicates that these materials are of interest for po…
The phylogenetic affinities of Lobocharacium coloradoense were investigated by analysis of combined 18S and 26S rDNA data. Results from both parsimony and likelihood methods supported a close alliance among Lobocharacium , Characiosiphon , and Characiochloris. These three taxa formed a clade near the base of the “ Dun…
A promising stress control process is demonstrated to achieve near-zero stress levels in thick porous silicon (PS) films. Stress reduction is necessary for thick PS structures to be used for radio-frequency applications such as on-chip inductors and transmission lines that require very thick (>100 μm) insulatin…
Moldable, cellulosic-based nonwoven composites with excellent thermal insulation properties were fabricated from kenaf, jute, flax, and waste cotton using recycled polyester and substandard polypropylene. The composites of these fibers have excellent shape stability and high tensile and flexural properties coupled wit…