Materials Literature
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We have investigated the pressure dependence of the superconducting transition temperature ${\mathit{T}}_{\mathit{c}}$ of elemental arsenic up to 41 GPa both experimentally and theoretically. Our measurements indicate that a peak in ${\mathit{T}}_{\mathit{c}}$ occurs at the rhombohedral--simple-cubic structural phase…
An investigation has been carried out to demonstrate the possibility of using the electrochemical potentiokinetic reactivation (EPR) method for determining the degree of sensitization of 12% Cr ferritic stainless steels. EPR tests were conducted on as-received and thermal-treated samples of a commercial heat of steel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSteroid moieties attached to macromolecular petroleum fraction via di- or polysulfide bridgesP. Adam, B. Mycke, J. C. Schmid, J. Connan, and P. AlbrechtCite this: Energy Fuels 1992, 6, 5, 553–559Publication Date (Print):September 1, 1992Publication History Published online1…
Powder materials having the composition Pb 0.88 Ba 0.12 (Zn 1/3 Nb 2/3 ) 0.30 (Mg 1/3 Nb 2/3 ) 0.50 Ti 0.20 O 3 were prepared by a two-step calcination method. All the constituent oxides, except for PbO, were precalcined, and then the resulting mixtures were postcalcined with PbO to obtain powders having the desired c…
Variation of the saturation magnetization, the electrical resistivity, the Hall parameters, and the Seebeck coefficient with quenching temperature was measured in cobalt ferrites, Co/sub x/Fe/sub 3-x/O/sub 4/ (x=0.94, 0.97, 1.00, and 1.03). With increasing quenching temperature, the saturation magnetization of cobalt…
The reflectance and transmittance of dielectric thin films at oblique angles of incidence have strong polarization effects. For some applications these effects are undesirable. A nonpolarizing beam splitter design concept is shown, which is based on the fact that in a quarter-wave stack at lambda(o) two effective indi…
The SAXS behavior of six selected samples of a set of polyetherester thermoplastic elastomers based on polybutylene terephthalate (PBT) as hard segments and polyethylene glycol (PEG) as soft segments in ratios 41/59, 49/51, 57/43, and 75/25 wt. % was studied under and without stress. Three different glycols with M n o…
A number of different experimental techniques have been used to probe the details of structural changes on the binding of Ca(II) to the large number of known calcium-binding proteins. The use of luminescent lanthanide(III) ions, especially terbium(III) and europium(III), as substitutional replacement for calcium(II),…
This paper proposes new types of one and two-dimensional electrooptic (E-O) lenses of simple structure. The two-dimensional lens is composed of two one-dimensional E-O lenses which are arranged to converge light beams perpendicular to each other. The refractive index distribution of the lens is calculated using the fi…
This introductory textbook emphasizes the fundamental principles of textile science and describes the basic processes of fabric manufacturing. The presentation comprises five parts: fibers, yarns, fabrics, colors and finishes, and fabric end uses. The fibers section contains chapters on fiber classification, theory, a…
Measurements of the frequency dependence of the room-temperature ferromagnetic resonance (FMR) linewidth have been performed in well-characterized barium hexaferrite single crystals at millimeter-wave frequencies. A shorted waveguide measurement technique was used to obtain very clean FMR profiles in the frequency ran…
Abstract In conventional multiphase Rietveld refinement, now being used for quantitative phase determination, the crystal structure of each phase needs to be known in order to generate a calculated standard pattern of the phase to be refined against the measured XRD pattern. This is a disadvantage when the structural…
Abstract Diagenetic K-feldspar overgrowths from the Permo-Triassic continental clastic sediments of the Elgin area in Scotland were examined using conventional petrographic techniques and transmission electron microscopy to investigate the mechanisms of feldspar authigenesis. The detrital K-feldspar in these rocks is…
An experiment was conducted to determine whether controlled internal drug release devices-type G (CIDR-G) could be used in conjunction with the ram effect to advance the breeding season and lambing and thereafter could be reapplied to stimulate breeding of ewes to produce a second lambing in late summer. Finn crossbre…
By means of Monte Carlo simulations, we examine the behavior of random packings of hard ellipses formed by pouring into a two-dimensional container. The particles pack so that their semimajor axes are preferentially aligned with the horizontal, and their orientational alignment increases with increasing aspect ratio.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric normal mode spectroscopy in the ordered and disordered states of diblock copolymersB. Stuehn and F. StickelCite this: Macromolecules 1992, 25, 20, 5306–5312Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1…
Three {V3O13} units linked to form a ring that encloses the central V atom are found in the VV title compound. The VIV/VV cluster consists of a layered structure composed of three {V2As2O4} rings. These are further examples of the exotic structures which are par for polyoxometalates. They show the profound influence t…
Abstract Oligomers of α‐pinene ( 1 ) with relatively high molecular weight (number‐average molecular weight M n = 1140, weight‐average molecular weight M w = 2590) were obtained with the binary catalyst AlCl 3 /SbCl 3 in toluene at − 15°C ([AlCl 3 ] 0 = 42,5 mmol · L −1 , mole ratio SbCl 3 /AlCl 3 = 0,50). The yield w…
The anomalous dielectric absorption current of BaTiO 3 ceramics when an electric field is applied at above the Curie point was measured. The results cannot be explained by the famous Maxwell-Wagner double layer theory. The total charge of the charging and discharging absorption current was more than 1000 µC/cm 2 . The…
Abstract An improved procedure for the anionic polymerization of hexamethylcyclotrisiloxane (D 3 ) initiated by a monofunctional lithium derivative is reported. The initiator seeding solution is preferably prepared in benzene, and tetrahydrofuran is used as a cosolvent which makes the presence of additional promoters…