Materials Literature
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The problem of diffraction from lossless reflection gratings is treated with a modal expansion formulation which incorporates an impedance condition on the mode eigenfunctions along the groove aperture. The theory for both fundamental polarizations is applied to three different grating profiles and is found to yield r…
Abstract Bruchmechanische Werkstoffkenngrößen von 17 Eisen‐Kohlenstoff‐Gußlegierungen der folgenden Sorten wurden in der vorliegenden Arbeit bestimmt: Gußeisen mit Lamellengraphit, Gußeisen mit Kugelgraphit, Temperguß und Stahlguß. Die Geschwindigkeit des Ermüdungsrißwachstums, Δa/ΔN wurde in Luft und Vakuum in Abhäng…
Amorphous Fe-B and zero magnetostrictive Co-Fe-B films have been prepared by rf diode sputtering technique. The anisotropy of the films is reduced by annealing them at 300ÅC in a rotating field. Annealed Co-Fe-B films have small but homogeneous uniaxial anisotropy, and exhibit very low coercivity(0.015Oe) and high eff…
Kinetics for the reaction of hydrogen with plutonium‐1 w/o gallium were measured using powder prepared " in situ ". The rates obeyed a first‐order rate law and were independent of temperature from −29° to 355°C. A pressure dependence proportional to was observed at pressures less than 1 kPa. From 1 to 70 kPa the press…
The magnetization curve and the magnetic viscosity in reverse fields are investigated in sintered SmCo5 magnet alloys. The initial magnetization curve is shown to be close to that of an ideal reversible magnetic material until a field greater than 2500 Oe is applied. At greater forward fields significant pinning takes…
$^{35}\mathrm{Cl}$ nuclear quadrupole resonance measurements around the order-disorder ferroelectric transition in HCl and HCl-DCl mixed crystals are analyzed for possible evidence of pretransitional clusters of biased ferroelectric dipoles in the matrix of the paraelectric phase. It is shown that the hypothesis of an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanistic investigation of the hydroxyl + hydroperoxo reactionMichael J. Kurylo, Odo Klais, and Allan H. LauferCite this: J. Phys. Chem. 1981, 85, 24, 3674–3678Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 Novemb…
Abstract Extinction of the diffusion flames in the stagnation‐point flow above the commercial polymers, poly(methyl methacrylate), polyoxymethylene (two types), polyethylene (three types), and polystyrene, is studied. The extinction data are used in a theory developed to obtain overall rate parameters for gas‐phase co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigher coordinate cyanide and isocyanide complexes. 11. Structural studies of three seven-coordinate isocyanide complexes of molybdenum(II) and tungsten(II)David J. Szalda, John C. Dewan, and Stephen J. LippardCite this: Inorg. Chem. 1981, 20, 11, 3851–3857Publication Date (…
Projectilelike reaction products from the $^{209}\mathrm{Bi}$+$^{136}\mathrm{Xe}$ reaction were studied at a laboratory bombarding energy of 1422 MeV. The fragments were identified by atomic number, and their kinetic energies and angular distributions were measured using three solid-state $\ensuremath{\Delta}E\ensurem…
Abstract The title compound has been synthesized by reaction of MeSnBr 3 and NaHSe in aqueous solution. The X-ray structure determination showed adamantane-like molecules (Sn-Se 253(1), Sn-C 215(1) pm) arranged in a quasi hexagonal-close packing. The atomic coordinates were used for an analysis of the vibrational spec…
The plastic deformation of niobium single crystals, purified by ultra-high-vacuum annealing, has been investigated in tension at temperatures between 77. and 4.2 K. The strongly orientation-dependent behaviour has been demonstrated by studying two tensile axis orientations, C (χ=l°, λ = 47°) and H (χ = 30°, λ = 45°).…
Abstract Die Perowskite Ba 2 B III SbO 6 kristallisieren monoklin (B III La, Pr, Nd) bzw. kubisch (B III Sm, Eu, Gd, Tb, Dy, Yb, Lu, Y). Die Sr‐Verbindungen, Sr 2 B III SbO 6 , besitzen eine monokline (B III Nd, Sm, Eu, Dy), rhombische (B III Yb, Lu, Y, Sc) bzw. kubische (B III In, Ga) Perowskitstruktur. Mit…
Abstract In a model reaction of terephthalic acid with aniline by using triphenyl phosphite in a mixed solvent of pyridine and N ‐methylpyrrolidone (NMP), mono‐ and dianilides were produced with relative yields varying with the content of pyridine in the solvent. The polycondensation of terephthalic acid with aromatic…
Abstract Based on the single, composition‐dependent glass transition criterion, poly‐ϵ‐caprolactone (PCL) was found to be miscible with each of four poly(styrene‐co‐allyl alcohol) (SAA) copolymers with hydroxyl contents between 1.3 and 7.7 wt %. Melting point depression of the PCL in the blends was used to evaluate th…
Dielectric properties of MnO at rf (up to ${10}^{5}$ Hz) along a [111] direction have been measured for the temperature range of 7 to 298 K, with special attention to the region near ${T}_{N}\ensuremath{\simeq}118$ K. A significant anomaly (\ensuremath{\sim}12% drop) in ${K}^{\ensuremath{'}}$, the real part of the die…
Anodic galvanostatic charging of nickel in p H 7.65 borate buffer solution produces a finely porous oxide film which is distinctly different from the passive film of NiO . The porous film which is probably NiOOH can grow to thicknesses in excess of 1000Å. It is reduced to a lower oxidation state during galvanostatic r…
Retention times (Rt) for acrylates, methacrylates, and vinyl monomers were measured with two different columns (C18 Corasil and C8 LiChrosorb) using reverse-phase HPLC in order to obtain their partition coefficients between 1-octanol and water (log P). The log P values of test compounds were determined from the regres…
Electrophoretic and albumin immunological data indicate that the Brachyphyllinae as currently conceived is a natural assemblage, with Erophylla sezekorni and Phyllonycteris aphylla being more closely related to each other than either is to Brachyphylla cavernarum. In both data sets, values that distinguish Erophylla f…
The birefringence in mixtures of 4-cyano-4\ensuremath{'}-octyloxybiphenyl (80CB) and 4-cyano-4\ensuremath{'}-hexyloxybiphenyl (60CB) has been studied near the nematic---to---smectic-$A$ ($\mathrm{NA}$) and smectic-$A$---to---reentrant-nematic ($A{N}^{\ensuremath{'}}$) transitions. There is an overall increase in the b…