Materials Literature
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The filling of thin-walled glass capillaries is tedious and time consuming especially when the powder tends to agglomerate due to extremely fine grinding (<10 t~m) in a micronizing mill. While special devices have been designed for loading capillaries in a dry box (Larsen & Leddy, 1958; Lange & Haendler, 1972), a tech…
Abstract The human central nervous system pharmacology of cis -diamminedichloroplatinum (CDDP) was studied, and trials were initiated of CDDP as a radiosensitizer in the treatment of malignant primary brain tumors. Samples were assayed for platinum using X-ray-dispersive fluorescence spectrometry. Platinum was barely…
Since the serine proteases form the most thoroughly understood family of enzymes, it is of some interest to consider what the two principal physical techniques of studying enzymes, crystallography and nuclear magnetic resonance (NMR), have told us about the details of their enzymatic mechanism. Due to limitations of s…
Abstract The chemisorption of CO on Co(10&1macr;0) has been investigated by LEED, UPS, EELS, Auger and sp measurements. CO is molecularly adsorbed between 100 and 420 K. This can be deduced from UP spectra, EEL spectra and the reversibility of the sp and the LEED results. The initial isosteric heat of adsorption h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface tension of a ternary polymeric solutionJ. D. Pandey and N. PantCite this: J. Am. Chem. Soc. 1982, 104, 12, 3299–3302Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://pubs.acs.org/doi/10.1021/ja0037…
Electrode films of lanthanide diphthalocyanines undergo a series of reversible color changes that make them potentially very attractive as flat-panel color display materials. Research on these compounds has revealed a complex scheme of electrode processes that is not yet fully characterized. The solid organic phases w…
This report reviews research on plant-derived agents that prevent sperm production if taken orally by the male or that incapacitate or kill sperm on contact if used vaginally by the female. It would be of great value to develop fertility inhibitors that are totally selective for reproductive systems and enzymes, and t…
The design and operation of a focusing camera for high-resolution macromolecular crystallography with synchrotron radiation (SR) are described. The performance of this service-oriented instrument is evaluated on the basis of five years of use. Standard procedures for data collection, data processing and data reduction…
The anodic corrosion of gold has been studied in concentrated chloride solutions as a function of chloride concentration and p H. Results are discussed in terms of five potential regions: active, prepassive, active‐to‐passive transition, passive, and transpassive. The existence of with a dissociation constant of the o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of sputtered molybdenum disulfide filmsThomas B. Stewart and Paul D. FleischauerCite this: Inorg. Chem. 1982, 21, 6, 2426–2431Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://pubs.acs.org/doi/10…
This paper postulates a physical model of electric aging and breakdown of polymeric insulated high voltage cables and substantiates this model with results of tests. In accordance with the model, scission of molecular chains and formation of craters at discharging voids are responsible for the electric aging and volta…
Cold-worked Zr—2.5 wt% Nb pressure tubes for Canada Deuterium Uranium pressurized heavy water reactors are made by hot extruding hollow billets into tubes that are cold-worked to size and to develop their tensile strength. All manufacturing steps are closely controlled, and the tubes meet very stringent specifications…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new model of structure and bonding in the boron hydridesA. J. Stone and M. J. AldertonCite this: Inorg. Chem. 1982, 21, 6, 2297–2302Publication Date (Print):June 1, 1982Publication History Published online1 May 2002Published inissue 1 June 1982https://doi.org/10.1021/ic001…
A series of three single-particle detectors for the detection of ions with keV energies has been built and investigated by experiment and by computer simulation. The incident ions hit a converter electrode and produce secondary electrons which are accelerated onto the funnel of a channel electron multiplier (CEM). Exp…
The viscosity of a soda-lime silica glass was measured at high strain rates. The data show non-Newtonian viscous flow in this inorganic oxide glass with the viscosity values below the expected Newtonian value. Following the imposition of large, steady strain rates, the observed stress increases with time to a maximum…
The behavior of unstable regions in the composition plane for III–V quaternary solid solutions made from among Al, Ga, In, P, As and Sb is analyzed, based on the strictly regular solution approximation for solid solutions. Temperature dependences of spinodal isotherms at 400–1000°C show that unstable regions cover a w…
The electronic structures of the Heusler alloys Co 2 MnSn, Co 2 TiSn and Co 2 TiAl are calculated using the SAPW method. The common properties and characteristics of these three alloys are seen in their band structures. Whether or not the orbital angular momentum is quenched in the three alloys is discussed on the bas…
The stimulated emission cross sections of rare-earth transitions depend strongly on the host. The properties that influence the cross sections—line strength, linewidth, and refractive index—are reviewed, and rules for tailoring cross sections are discussed. To illustrate the application of these rules, the largest sti…
The day fractions of nine New Zealand soils and an andesitic pumice, separated using minimal prctreatment, were examined by infrared spectroscopy (IR) and by dissolution in acid oxalate and pyrophosphate reapnts. Allophane, with an Al/Si ratio dose to 2/1, was prcsent in most samples and was estimated quantitatively f…
The unreacted methacrylate groups on the surface of conventional composites and microfilled composites were studied by means of multiple internal reflection infrared spectroscopy. The influences of polymerization time, temperature, and the effect of polishing were studied. We also attempted to relate the results of so…