Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWavelength-dependent photostable or photoreversible photochromic systemR. Schmidt, W. Drews, and H. D. BrauerCite this: J. Phys. Chem. 1982, 86, 25, 4909–4913Publication Date (Print):December 1, 1982Publication History Published online1 May 2002Published inissue 1 December 1…
Formation of aluminosilicate glasses containing oxides of rare‐earth elements, e.g. Sc, Ce, Pr, Nd, Eu, Gd, Tb, Dy, Ho, Er, and Yb, was studied by melting at 1550°C and air quenching. The upper limit of the amount of rare‐earth oxide which can be incorporated into the aluminosilicate glasses decreases according to the…
Polarized neutron diffraction has been an extremely valuable technique for studying outer electron distributions in magnetic materials through measurements of magnetic form factors. Representative results are presented on the following classes of elemental materials : 3d ferromagnetic metals, paramagnetic metals, rare…
A three-chained peptide from type I collagen, crosslinked by hydroxyaldolhistidine, has been isolated from a tryptic digest of 5 M guanidine.HCl-insoluble bovine skin collagen (a small but as yet unknown percentage of the total collagen in whole skin). OsO(4)/NaIO(4) specifically cleaved the crosslink at its double bo…
Ten cation contaminants, namely Al, Ga, Co, Fe, Mg, Zn, Zr, Ca, Sr, and Ba were investigated for their effects on the electrical properties, microstructures, and discoloration of conductive TiO2 ceramics. It was found that Al, Ga, Co, Fe, and Mg cause discoloration and increase the electrical resistivity by a factor o…
Comparison of the plastic flow properties of transforming metastable austenite, stable austenite, and martensite over a range of temperatures and strain rates allows quantitative estimates of (a) the static-hardening effect of the two-phase mixture and (b) the dynamic-softening effect of the transformation as a deform…
The solubilities of the elements Mg and Ca are determined in monocrystalline silicon. The doping is accomplished using liquid‐phase epitaxy of silicon from Mg/Si or Ca/Si melts. Both Mg and Ca exhibit a strong retrograde solubility. The maximum solubility of Mg in silicon is ; that of Ca in silicon is . The segregatio…
Abstract Mechanical properties of rubber‐modified polymers are not single‐valued functions of rubber/matrix type and rubber content, but also vary with processing conditions. The variations in mechanical properties with processing conditions arise mainly from changes in rubber‐phase dispersion. In our past work, by li…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation, properties, and kinetics of the reaction of manganese(0) radicals Mn(CO)3(R3P)2 with tributyltin hydrideSharon B. McCullen and Theodore L. BrownCite this: J. Am. Chem. Soc. 1982, 104, 26, 7496–7500Publication Date (Print):December 1, 1982Publication History Publ…
From the measurement of three-probe resistivities, which are much larger than two-probe resistivities, we conclude that annealed, nominally pure and nearly stoichiometric NiO single crystals normally have a low-resistivity surface layer which masks the behaviour of the bulk in most electrical measurements. Bulk resist…
Improved one-tier and two-tier designs for a high-pressure–low-pressure (HPLP) apparatus are described together with some of their recent applications. These instruments are used for surface analysis and in situ monitoring of catalytic reactions on small samples with a geometrical surface area of 1 cm2. Catalytic reac…
The structure of cyclohexylsilanetriol C6H11Si(OH)3 has been determined by single-crystal x-ray diffraction methods. The molecule crystallizes in the monoclinic system, space group C2/m, with a=7.876(3), b=6.637(6), c=15.802(11) Å, β=95.51(3)° at −60 °C, and Z=4. The intensities of 1031 independent reflections were me…
The low-temperature phase transitions of tetramethyltetrathiafulvalene thiocyanate are described through magnetic and structural studies. A first transition, which occurs at 160 K, drives the electron gas into a localized state and is shown to be associated with a superstructure formation. Then, the condensation of an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNMR spectroscopic studies on chalcogen compounds. 4. Carbon-13 isotope effect on selenium-77 and tellurium-125 nuclear shielding and its correlation with carbon-selenium bond distances. Tellurium-123 isotope effect on tellurium-125 nuclear shieldingWilly GomblerCite this: J.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWet oxidation of acetic acid catalyzed by Co-Bi complex oxidesSeiichiro Imamura, Akihiro Hirano, and Nariyoshi KawabataCite this: Ind. Eng. Chem. Prod. Res. Dev. 1982, 21, 4, 570–575Publication Date (Print):December 1, 1982Publication History Published online1 May 2002Publis…
X-ray photoelectron spectra and electron-energy-loss spectra (EELS) are presented and interpreted for Pd${\mathrm{H}}_{\mathrm{\ensuremath{\sim}}0.8}$ prepared by in situ loading and cleaning of a 10-\ensuremath{\mu}m foil cooled to 80 K. Hydrogenation induces new states with considerable $d$ character 8 eV in the val…
We have previously reported that glucose can be phosphorylated by phospho-HPr and two sugar-specific pairs of proteins of the Escherichia coli and Salmonella typhimurium phosphoenolpyruvate:glycose phosphotransferase system. Each of the sugar-specific complexes comprises two proteins, lipid, and divalent cation, and e…
Ferroelectric thin films of BaTiO3 have been successfully deposited on n-type silicon substrates at temperatures above 500 °C by rf sputtering in an O2/Ar atmosphere. Analysis by x-ray diffraction patterns show that films deposited at room temperature are amorphous. At temperatures above 500 °C, crystalline BaTiO3 fil…
The widely held view that Al and Fe are transported from A2 to B horizons in podzols in the form of fulvate complexes cannot account satisfactorily for the formation of Bs horizons rich in allophane, although this can be the dominant illuvial horizon in Iron Podzols, and a major feature of the B horizon of Iron Humus…
Iron was ion implanted with He and deuterium (D) and then heated at a constant rate of 2 K/min. The evolving depth distribution of the D was monitored using the nuclear reaction 2D(3He,p)4He, and resulting data were analyzed by applying the diffusion equation with appropriate trapping terms. Two defect traps for D wer…