Materials Literature
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<div class="htmlview paragraph">Six-component aerodynamic force and moment data are compared from tests of four 1/10-scale truck models at four wind tunnels on the North American Continent. Each model was tested in both a standard and a fuel saver configuration.</div> <div class="htmlview paragraph">…
The optical transmission loss spectrum of an arsenic sulphide glass fiber was measured in a wavelength region between 1.0 and 5.5 µm. Minimum losses of 92 dB/km at 1.85 µm, 78 dB/km at 2.4 µm and 164 dB/km at 5.3 µm were obtained in the fiber with a small tail on the band edge absorption. The fiber was drawn from a hi…
The susceptibility of sensitized Type 304 stainless steel and ASTM A508 Cl 2 steel to SCC in high temperature oxygenated water, as determined using constant extension rate tests, is found to depend upon the velocity of the fluid flowing past the gauge section. This work has demonstrated that in both cases, the failure…
Abstract Die Verbindungen M 4 [Ag 4 O 4 ] mit M LiCs und M 4 [Cu 4 O 4 ] mit M LiRb wurden erneut dargestellt; die Kristallstruktur wurde am K 4 [Ag 4 O 4 ] überprüft. Entgegen unserem ersten Befund [2, 3] (I 4 ) liegt in I 4 m2 zwar die Gruppe [Ag 4 O 4 ] 4− vor, doch sind je zwei O 2− (trans‐Stellung) etwas (0…
Nonferroic phase transitions are defined as the structural transitions occurring with a breaking of translational symmetry within the same crystal class. They involve no new macroscopic tensor components below the transition point, and they are generally identified experimentally through the onset of superlattice refl…
Sodium ion, cesium ion, and water self‐diffusion coefficients in a perfluorinated carboxylate polymer film have been measured. Results are compared to those obtained for a perfluorinated sulfonate polymer, Nafion. Both cation and water diffusion coefficients are very large in these materials in relation to the equilib…
Carbonate-containing apatites prepared from aqueous and non-aqueous media were investigated by ESR, IR, and X-ray diffraction. A typical asymmetric signal at g = 2.0, which many workers have observed in irradiated calcified tissues, is interpreted in terms of CO3(3)- and Co-2 and the trapped electron center, The CO3(3…
Abstract A series of interpenetrating polymer networks, IPN's, and semi‐1 IPN's of poly(n‐butyl acrylate) and polystyrene were prepared. The glass transition behavior via dynamic mechanical spectroscopy (DMS) and the morphology via transmission electron microscopy (TEM) were studied as a function of composition ratio…
Abstract Model hard segments having different chain length and chain terminating groups, such as methyl, ethyl, octyl, and octadecyl, have been synthesized from diphenyl‐methane diisocyanate (MDI) and butanediol and studied by DSC. In the case of short chain ends (i.e., methyl, ethyl, and octyl), hard segments having…
Effect of a transverse magnetic field on the suppression of thermal convection was investigated in a vertical column of melt under a destabilizing temperature gradient (β). The melt height and β were 2.5 cm and 16°C/cm, respectively. At , a turbulent thermal convection occurred as measured by a thermocouple inserted i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyrazolyl-bridged iridium dimers. 2. Contrasting modes of two-center oxidative addition to a bimetallic system and reductive access to the starting complex: three key diiridium structures representing short nonbonding and long and short bonding metal-metal interactionsA. W.…
The kinetics of laser and furnace-induced solid phase epitaxial crystallization of As-implanted amorphous layers (∼0.16 μm) on Si (100) substrates was studied using a time-resolved optical reflectivity technique. Epitaxial rates from 10−10 to 0.2 cm/sec were measured over a temperature range from 750 to 1550 °K at two…
Abstract A synthesis of studies on the photocatalytic oxidation of various compounds (isobutane, propene, alkyltoluenes, butanols, ammonia, halide ions in aqueous solution) is presented, TiO 2 being the main photocatalyst. Comparisons are also made with other n‐type semiconductors: ZrO 2 , V 2 O 5 , Sb 2 O 4 , ZnO, Sn…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure and emission spectrum of the undecacoordinate complex tris(nitrato)-1,4,7,10,13-pentaoxacyclopentadecaneeuropium(III)Jean Claude G. Bunzli, Bernard Klein, Gervais Chapuis, and Kurt J. SchenkCite this: Inorg. Chem. 1982, 21, 2, 808–812Publication Date (Print…
Abstract Poly(caprolactone) (PCL) was blended with poly(chlorostyrene) (PSCI) and chlorinated polypropylene (PPCl). A single glass transition temperature T g was found for these mixtures, indicating their miscibility. PCL crystallizes in these blends when the chlorinated polymer content is not too high. Otherwise, T g…
Terbium, a trivalent lanthanide, effectively substituted for Ca2+ in calmodulin as judged by several criteria: intrinsic fluorescence spectra, altered mobilities on polyacrylamide gel electrophoresis, formation of a stable complex with troponin I or calcineurin, and stimulation of phosphodiesterase. Calmodulin harbors…
We report details and results of experiments in which surface enhanced Raman scattering from molecules is studied as a function of their spacing from a rough silver enhancing layer. Two types of experiments were performed. In the first, an organic monolayer chemisorbed on aluminum oxide is covered with a smooth low Ra…
Abstract Blends of polycaprolactone (PCL) with chlorinated polyethylenes (PECls) having chlorine contents of 25, 30, 36, 42, and 48% by weight were prepared and studied by differential scanning calorimetry and small‐angle light scattering (SALS). It was found that blends made with PECls containing 30% or more chlorine…
This paper describes the structure of bovine pancreatic ribonuclease A, refined by a restrained parameter least squares procedure at 2.0 A resolution, and rebuilt using computer graphics. The final agreement factor (formula see text) is 0.159. The positions of the 951 main chain atoms have been determined with an esti…
Abstract Acetyl sulfate was used as sulfonating agent for the sulfonation of cis ‐1,4‐polyisoprene. IR and NMR spectra showed that the sulfonation was accompanied by extensive cyclization. A series of DSC and loss tangent studies of both the sodium salts and the methyl esters was undertaken. It was found that cyclizat…