Materials Literature
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Mechanics of textile fabrics by modelling of equilibrium of forces is difficult to apply broadly in practical applications. An alternative, which offers more promise for industrial utility in computer-aided design, is the energy-based approach described by Hearle and Shanahan (1978 a, b). The paper reviews the basic p…
We present a full characterization of the anhydrous layered material K2SrTa2O7 related to Ruddesden–Popper type phases. The unit cell, determined from powder X-ray diffraction, is tetragonal with a = 3.9858(1) Å and c = 21.785(1) Å (space group I4/mmm, Z = 2). The layered structure allows spontaneous water intercalati…
An intensely sweet polyoxypregnane glycoside, telosmoside A15 (15), was isolated from an Asian Asclepiadaceae plant, Telosma procumbens, collected in Vietnam. This is the first time a sweet pregnane glycoside has been found, and its sweetness intensity is 1000 times greater than that of sucrose. From the same plant, 1…
Protection of Iron Against Corrosion Using a Polyaniline Layer: II. Spectroscopic Analysis of the Layer Grown in Phosphoric/Metanilic Solution , Bernard, Marie Claude, Joiret, Suzanne, Hugot-Le Goff, Anne, Long, Pham Duy
Biodegradable microspheres were prepared with poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV, 85:15 by mole ratio of hydroxybutyrate to hydroxyvalerate) by an water-in-oil-in-water (W/O/W), oil-in-water (O/W) and oil-in-oil (O/O) solvent evaporation method for the sustained release of anti-cancer drug, 5-fluoroura…
Changes produced after hydrothermal treatments at 400 °C and at different pressures in a set of Lu-saturated smectites have been compared with those occurring in a mixture of 2SiO 2 :1Lu 2 O 3 . The effect of the mineralogical composition of the smectite on the reactivity has been analyzed. The growth of a new crystal…
Large numbers of identical and stable SE(R)RS [surface-enhanced (resonance) Raman]-active media, which are convenient to handle and manipulate but sufficiently inexpensive that they can be used once and then discarded, have been prepared by isolating nanoparticles from Ag and Au sols in hydrophilic polymer gels. The p…
Polycrystalline diamond films and diamond powders, treated with elementary fluorine, chlorine trifluoride or anhydrous hydrogen fluoride under various conditions, have been examined using spectroscopic and microscopy techniques. Formation of C–F bonds occurs when F2 or ClF3 are used, the surface groups present being t…
The characteristics of partial discharge (PD) occurring within electrical trees in extruded cable insulation, and also at model interfaces between a cable and its accessories, have been investigated. A wideband PD detection system was used that enabled the true shape of the PD pulses to be measured. The rise- and fall…
The continuous ultrasonic devulcanization of natural rubber (NR) filled with various concentrations of carbon black (CB) indicated a minimum of crosslink density and gel fraction at an intermediate amplitude, which is independent of CB content. An attempt was made to improve the efficiency of devulcanization by use of…
Anodic film growth in the passive region was studied using the electrochemical quartz crystal microbalance (EQCM) technique. Samples were produced using physical vapor deposition with the compositions of a 304L stainless steel with additions of 20 atom % Cr, Mo, or W. By simultaneous in situ recording of mass and curr…
The use of perfluoroalkyl-substituted cobalt complexes as catalysts for the oxidation of alkyl aryl sulfides with molecular oxygen/2,2-dimethypropanal has been studied in a fluorous organic biphasic system. The addition of very small amounts of a CoII−tetraarylporphyrin (Co-4) led to increased substrate conversions (6…
Stereospecific formation of the chiral heterodinuclear 3d–4f complexes (Λ–Δ)-[(acac)2Cr(ox)Ln(HBpz3)2] (acac− = acetylacetonate, ox2− = oxalato, HBpz3− = hydrotris(pyrazol-1-yl)borato; Ln = Yb: 1, Dy: 2 where (Λ–Δ) implies the absolute configuration around the octahedral Cr and square antiprismatic Ln moiety, respecti…
We present a generalized finite element model of magnetostriction phenomena where the direct and inverse effects are taken into account. The variational formulation in terms of magnetic vector potential and displacement is used to solve this coupled problem. Different computing steps in 3D and 2D cases are reported.
Small copper(I) oxide, Cu2O, particles dispersed in diamine-terminated poly(ethylene oxide) (PEO-NH2) matrices have been successfully prepared by vacuum evaporation of copper on to molten PEO-NH2, followed by heat treatment. The obtained composites were characterized by TEM, electron diffraction, viscometry, TG–DTA an…
The structural characteristics of several modulations of Al–Co–Ni decagonal quasicrystals and crystalline approximants, all of which are found in and around an Al–Co–Ni decagonal phase with a wide compositional range, are discussed systematically. The structures of a Ni-rich basic structure and the other modulations a…
The organic low- k hybrid-organic-siloxane-polymer (HOSP ® ) has been investigated as an intermetal dielectric. The presence of Si-H and bonds instead of partial Si-O bonds lowers the dielectric constant compared to conventional siloxane-based spin-on glass. However, dielectric degradation occurs due to the destructio…
Galactosemia is an inherited disorder characterized by an inability to metabolize galactose. Although classical galactosemia results from impairment of the second enzyme of the Leloir pathway, namely galactose-1-phosphate uridylyltransferase, alternate forms of the disorder can occur due to either galactokinase or UDP…
The liquid crystalline (LC) order appears in a variety of polymer systems, such as solutions of rod-like molecules (DNA, TMV), solutions of semiflexible molecules (long fragments of DNA), block-copolymer melts, main-chain and side-chain liquid crystalline polymer melts etc. Many LC phases have been observed in these s…
Capability of oxygen store and release of ceria-zirconia solid solution made by attrition mill process was measured by thermo-gravimeter with 1mass% of Pt. Ceria-zirconia solid solution made by conventional heating method of ceria powder with zirconium salt was also characterized for comparison. Capability of oxygen s…