Materials Literature
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Abstract A combination of two semipermeable microporous hydrophilic polymer films, inserted between two different fabrics (internal and external), proposed for some kinds of protective clothing, when it is necessary to protect the room atmosphere against particles (causing illness) emitted from human body, and to ensu…
Single crystalline zinc oxide (ZnO) nanowires have been grown on Si (100) substrates by a vapor-liquid-solid (VLS) process at temperatures in the range 850-950 °C in an inert atmosphere. The VLS-grown ZnO nanowires have been characterized in detail using X-ray diffraction (XRD), field emission scanning electron micros…
Abstract Photochromic properties of methylacrylate monomers and polymers containing azobenzene groups with heterocyclic sulfonamide functionalities viz sulfisomidyne (4-amino-N-[2,6-dimethylpyrimidyn-4-yl]benzenesulfonamide) and sulfamethoxazole (4-amino-N-[5-methylisoxazol-3-yl]benzenesulfonamide) substituents were i…
The integrated-intensity ratio R of the L β and L α lines in x-ray emission spectra of 3 d transition metal oxides was measured. The magnitude of the ratio was found to depend nonmonotonically on the atomic number of the 3 d elements, with a sharp rise in the middle of the series. In terms of the theory of one-electro…
Within the framework of severe reactor accident studies, we present experimental and numerical parametric studies on debris bed coolability. Data are provided by the SILFIDE multidimensional experimental facility at Electricité de France. The bed is composed of inductively heated steel sphere beads (diameters ranging…
Abstract This paper demonstrates the use of two‐dimensional (2D) correlation spectroscopy in the characterization of the sodium molybdate structures that include and are intermediate between the hexagonal and orthorhombic forms; this series of sodium molybdates is produced by varying the preparation conditions, partic…
Abstract The thermal spin transitions of iron(II) spin-crossover compounds [Fe(PM-iPA)2(NCS)2] (1) and [Fe(PM-iPA)2(NCSe)2] (2) (PM-iPA = N-(2′-pyridylmethyl)-isopropylamine) have occurred at T1/2 = 267 K and 376 K without thermal hysteresis. No light-induced excited spin state trapping (LIESST) effect was observed fo…
Abstract The hydrolytic and thermal stability of random copolyesters of ε ‐caprolactone ( ε ‐CL) and ca. 30 mol‐% 2‐oxepane‐1,5‐dione (OPD) have been investigated. Compared with poly( ε ‐caprolactone) (PCL) of a comparable molecular weight, the hydrolytic degradation of the copolyester is faster in a phosphate buffer…
Pewter, a tin-rich alloy, has been widely used for ornamental and utilitarian purposes for the last 400 years because it is durable, relatively easily worked, resistant to corrosion, and similar to silver in appearance. Pewter plates and implements have been recovered and examined from what is believed to be the wreck…
Calcium (Ca(2+)) fluoroionophores are useful in cell-based functional assays of G-protein coupled receptor (GPCR) activation or ion channel modulation. In this paper we describe new calcium probes that improve or overcome certain deficiencies in existing probes. These new fluoroionophores are based on acylation of ami…
The drape attributes of fabrics, number of folds, depth of folds and evenness of folds were measured together with the drape coefficient. The relationship between these measurements and the subjective evaluation of the fabric drape was modelled for each end‐use on a neural network using back propagation, which can cor…
The microstructures of two hot-pressed Si3N4 ceramics, with 3.33 and 12.51 wt% Lu2O3 additive, have been characterized using transmission electron microscopy. The microstructures of both samples consisted of elongated β-Si3N4 grains and a secondary phase, contained in pockets surrounded by the grains, with a crystalli…
Pouco se conhece sobre a diversidade de solos em ambientes altimontanos do Brasil apesar da acentuada valorização ecoturística atual. Foram estudados atributos químicos, físicos, mineralógicos e micromorfológicos de dez perfis de solos altimontanos em dois transectos do domínio quartzítico do Parque Estadual do Ibitip…
The oxidation product of the binuclear copper (I) complex Cu2L(ClO4)2 (L = N,N'-bis-(6-methyl-2-pyridil) (2'-pyridyl)methyl m-xylylidene imine) has been isolated and structurally characterised. In the cupric species, [Cu2L(Me-O)2](ClO4 )2, the metal centres are bridged by two methoxide groups, and the oxygenation of t…
We describe the preparation and characterization of a new double perovskite of formula Ba 2 MnMoO 6 . It has been obtained in polycrystalline form by thermal treatment, in a H 2 /N 2 flow, of previously decomposed citrate precursors. This material has been studied by X-ray (XRD) and neutron powder diffraction (NPD): i…
We present measurements of the temperature dependence of the pyroelectric effect in congruently melting strontium–barium–niobate doped with cerium and chromium in the range of the relaxor phase-transition. The influence of the doping concentration on the transition temperature is shown and discussed with respect to th…
Argininosuccinate synthetase reversibly catalyzes the ATP-dependent condensation of a citrulline with an aspartate to give argininosuccinate. The structures of the enzyme from Thermus thermophilus HB8 complexed with intact ATP and substrates (citrulline and aspartate) and with AMP and product (argininosuccinate) have…
The aim of this work was to demonstrate the possibility of obtaining enantiotropic liquid crystals containing a single phenyl group over a wide temperature range but without hydrogen bonding. We report the synthesis and characterization of several alkoxy monophenyl compounds linked by a thioester group to a 2-(perfluo…
The microstructural and texture evolution of cold rolled low stacking fault energy fcc Fe‐30Mn‐3Al‐3Si alloy was investigated as a function of the cold rolling strain. The alloy was melted and cast in a vacuum induction furnace, hot rolled and annealed before being cold rolled at three different strains: ε = 0.035, e…
This paper investigates the dielectric properties of various N/sub 2//SF/sub 6/ gas mixtures based upon a cylindrical spacer model with adhering particle on the surface tinder homogeneous field conditions. The investigation involves a comparison with pure SF/sub 6/. The flashover field strength for clean and particle…