Materials Literature
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Photon correlation spectroscopy was performed on a dilute bcc colloidal crystal in a thin-film cell to measure its response to thermal fluctuations with wave vectors along lattice symmetry directions. The phonon dispersion curves show a definite harmonic-lattice behavior for longitudinal and transverse modes. We prese…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemplate syntheses of 1,2-alkene dichalcogenide chelates via the addition of activated acetylenes to biscyclopentadienyltitanium pentachalcogenidesC. Mark Bolinger and Thomas B. RauchfussCite this: Inorg. Chem. 1982, 21, 11, 3947–3954Publication Date (Print):November 1, 1982…
New details of NADPH binding to Lactobacillus casei dihydrofolate reductase have become visible as a result of crystallographic refinement to an R factor of 0.152 at 1.7 A resolution. Conformational torsion angles for bound NADPH have been extensively revised and specific interatomic contacts responsible for cofactor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemoval and recovery of arsenous oxide from flue gases. A pilot study of the activated carbon processRoger L. Player and Huibert J. WouterloodCite this: Environ. Sci. Technol. 1982, 16, 11, 808–814Publication Date (Print):November 1, 1982Publication History Published online1…
Abstract Drawn nylon 6 filaments were subjected to swelling treatment with benzyl alcohol and aqueous solution of phenol and formic acid under slack condition and under tension. The pretreated samples were dyed with a disperse dye Foron Yellow SE‐FL (C.I. Disperse Yellow 42). A considerable increase in the equilibrium…
The paper discusses effects of bending on domain configurations and losses of HI-B sheets with stress coating. Two-dimensional loss topograms were determined using a new test system based on raster-scanning the specimen surface with a thermistor. For longitudinal bending, considerable loss increases resulted. Transver…
This paper discusses the effects of demagnetization on domain configurations of HI-B sheets with stress coating. Demagnetization frequency was varied between 5 Hz and 1 KHz. As frequency increased, considerable refinement of main domains resulted, especially for wide domains. Its extent was a maximum close to 10 Hz an…
Abstract A phosphorus‐ and nitrogen‐containing polyl is prepared by condensing tetrakis(hydroxymethyl)phosphonium chloride with diethanol amine in aqueous medium. The newly synthesized polyol‐bis(hydroxymethyl)‐ N , N ‐bis(2‐hydroxyethyl)aminomethylphosphine oxide (AMPO) is used in the preparation of rigid polyurethan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrthorhombic vs. monoclinic structures for the α and γ phases of poly(vinylidene fluoride): an analysisS. Weinhold, M. A. Bachmann, M. H. Litt, and J. B. LandoCite this: Macromolecules 1982, 15, 6, 1631–1633Publication Date (Print):November 1, 1982Publication History Publish…
Abstract A laboratory cutting and chipping test for off-the-road, (OTR) and heavy duty, (HD) tires has been developed that predicts service performance with reasonable speed and accuracy. It makes possible the investigation of many compounding factors quickly and inexpensively. A test can be made on a sample in the sh…
Experimental results for some physical properties of Li 2 O‐B 2 O 3 and SrO‐B 2 O 3 glasses with high modifier content showed anomalies in the composition dependence of many properties such as thermal expansion coefficient, transformation temperature, softening temperature, density, and refractive index at 30 to 33 mo…
We develop a model of superexchange interactions in W-hexagonal ferrites. We analyse all possible interactions and classify the exchange energies from structural considerations. The spin configuration deduced from the model is in agreement with experimental results. Finally, the effect of preferential substitutions on…
The dielectric behavior of (1‐ x )(Sr 0.5 Pb 0.25 Ca 0.25 ) TiO 3 ‐x(Bi 2 O 3 ·3TiO 2 ) was studied using x=O to 8.25 mol%. Around the point at which x equals 1.56 mol%, the following phenomena were observed: (1) At −;22°C, the weak field permittivity increased substantially with a dc bias field, becoming more than tw…
Recent redetermination of the melting curve of albite, NaAlSi3O8, has raised questions about possible nonequilibrium states in viscous silicate liquids near their liquidus temperatures and about the thermodynamic description of albite melt at high P and T. Solid solubility of excess nepheline in albite, and of excess…
The diffusion of Cs + , Rb + , and K + ions was measured in three grades of vitreous SiO 2 by the radiotracer‐sectioning technique or Rutherford, backscattering spectroscopy. The values of the diffusion coefficient, D , at 1000°C decrease strongly with increasing ionic radius, changing by about two and one‐half orders…
Abstract The spectra of the creation of long‐lived Frenkel defects (F, H and α, I pairs) by 7.5 to 9.0 eV photons and the thermal annealing of defects created at exciton decay or at the recombination of electrons with holes are measured in KCl crystals by the luminescence methods at 4.2 K. Pairs of defects with variou…
Magnetic and thermal properties of Co100−xTax(11≤x≤25) and Co100−xWx(13≤x≤25) amorphous films deposited by rf diode sputtering have been investigated. In both systems, structural changes of these films from crystalline to amorphous lead to a drastic decrease of their coercive force Hc and the absolute value of saturat…
New CaO‐P 2 P 5 glass ceramics were prepared by crystallizing glass rods or plates unidirectionally in a temperature‐gradient furnace. The unidirectionally crystallized glass showed extremely high bending strength (∼500 to 600 MN/m 2 ) even when subjected to a severe abrasion treatment with Sic paper. Scanning electro…
The deterioration of polyethylene and polyvinyl chloride cable materials in the containment building of an operating nuclear reactor has been investigated. Since the maximum dose experienced by the cable materials was only 2.5 Mrad during ∼12 yr of operating life, the extent of material degradation was surprising. Lab…
Loss separation measurements were made on regular grain oriented 3% Si steels of four sheet thicknesses, one thickness of high permeability oriented 3% Si steel, two grades of nonoriented Si steel, a low carbon steel, a primary recrystallization oriented low alloy iron sample, and an amorphous metal sample. The Bn dep…