Materials Literature
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This paper describes a low cost mobile measurement system for the determination of gold in vivo base around a 153Gd radiation source and a hyper pure germanium detector. Early clinical results are also presented to demonstrate the efficacy of the system.
Many of the in-core components in pressurized water reactors are constructed of austenitic stainless steels. The potential behavior of these components can be predicted using data on similar steels irradiated at much higher displacement rates in liquid-metal reactors or water-cooled mixed-spectrum reactors. Considerat…
Abstract The effect of surface treatment of saw dust on the physico‐mechanical properties of saw dust‐filled polypropylene composites was studied. Whereas the elastomer‐pretreated saw dust decreases the strength of composites, in‐situ addition of interface modifiers, such as maleated polypropylene, m‐phenylene bismale…
Poly(β-phenethyl l-aspartate) was found to exhibit a thermally-induced helixhelix transition between the low temperature (right-handed) and the high temperature (left-handed) forms in the lyotropic cholesteric solution. The transition takes place sharply and reversibly at around 90°C, the birefringent character of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and structures of the osmaborides boridohexadecacarbonylhydridopentaosmium and (dihydroborato)dodecacarbonylhydridotetraosmiumJang Hoon Chung, David Knoeppel, Deborah McCarthy, Anne Columbie, and Sheldon G. ShoreCite this: Inorg. Chem. 1993, 32, 16, 3391–3392Publ…
Small Angle Neutron Scattering experiments were carried out on liquid crystalline “side-on fixed” polyacrylates : we observe that the polymer backbone adopts a prolate conformation in the nematic phase. Such anisotropy of the global backbone is larger for smaller spacer length. In every case we measure at low temperat…
Multifragmentation, following the formation of toroidal and bubble nuclei, is observed with an improved Boltzmann-Uehling-Uhlenbeck model for central $^{92}\mathrm{Mo}$${+}^{92}$Mo collisions. With a stiff equation of state, simultaneous explosion into several nearly equal fragments in a ringlike manner occurs due to…
The relation between catalytic ability for hydrogen evolution reaction and characteristics of nickel‐tin alloys prepared by electroplating was investigated. The catalytic ability was found to strongly depend on preparation conditions. Hydrogen overvoltage was drastically decreased with an increase of the width at half…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase separation behavior of poly(vinyl alcohol) solutions in relation to the drawability of films prepared from the solutionsMasaru Matsuo, Mutsuko Kawase, Yuri Sugiura, Satomi Takematsu, and Chisako HaraCite this: Macromolecules 1993, 26, 17, 4461–4471Publication Date (Pri…
The multiconfiguration Hartree-Fock method for continuum wave functions has been used to calculate the scattering length and phase shifts over extremely low energies ranging from 0 to 1 eV very accurately for electron-helium scattering. The scattering length is calculated very accurately with wave functions computed e…
Linear polyimides are prepared by condensation polynerization which involves the elimination of volatiles. These volatiles are responsible for severe problems encountered in the fabrication of parts, particularly thick and large components. Some success has been attained by reducing the volatile level through p-stagin…
The incommensurately modulated structures of the isostructural blue bronzes of K and Rb with modulation wavevector q = a* + 0.748 (1)b* + 1/2c* at 100 K have been determined by X-ray diffraction. The lattice parameters of the C-centred monoclinic cell for K0.3MoO3 are: a = 18.162 (2), b = 7.554 (1), c = 9.816 (1) angs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDilute-solution chiral optical changes signal the thermally reversible gelation of poly(n-hexyl isocyanate) in hydrocarbon solventsMark M. Green, Chetan A. Khatri, Michael P. Reidy, and Kalle LevonCite this: Macromolecules 1993, 26, 17, 4723–4725Publication Date (Print):Augu…
The effect of sulfide (S2–) ions on the corrosion behavior of an austenitic steel (Uranus B6) in phosphoric acid (H3PO4) solutions was examined. The critical concentration at which the effect of S2– ions became perceptible was determined. Aggressive effects of the ions increased with increases in temperature and oxyge…
ADVERTISEMENT RETURN TO ISSUEPREVArticleA two-dimensional self-consistent-field model for grafted chains: determining the properties of grafted homopolymers in poor solventsKanglin Huang and Anna C. BalazsCite this: Macromolecules 1993, 26, 17, 4736–4738Publication Date (Print):August 1, 1993Publication History Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDoubly-hydrated hexafluoroacetylacetone as a tetradentate ligand: synthesis, magnetochemistry, and thermal transformations of a dimanganese(III) complexElisabeth Bouwman, Kenneth G. Caulton, George Christou, Kirsten Folting, Christophe Gasser, David N. Hendrickson, John C. H…
Cadmium sulphide thin films have been deposited chemically at near room temperature in aqueous ammonia solutions using thiourea as the sulphur source. The composition of the solution was [CdSO4] = 1.4 × 10−2M, [Thiourea] = 2.8 × 10−2 M, [NH3] = 1.74 M. The structure of the layers and the growth mechanism are studied b…
„Metallautismus”︁ ‐ dieser Begriff charakterisiert treffend den Befund, daß im adamantanoiden Eisen(III)‐Chelatkomplex 1 die vier Eisenzentren weder elektronisch noch magnetisch miteinander wechselwirken. Verbunden sind die vier Metallatome über sechs Chelatliganden 2 , die durch Deprotonierung des Kondensationsproduk…
A new method for the design of antireflection coatings is described in which a linearly constrained quadratic programming optimization procedure is used to find an inhomogeneous layer solution that, for a given overall thickness of the layer, corresponds to the global optimum for the problem. The refractive-index prof…
The application of a DC electric field (poling) to a ferroelectric lead zirconate titanate (PZT) ceramic aligns domains in the field direction. The non 180°-domain switches involve mechanical deformations, which are detected as acoustic emission signals. Concurrent with AE signals, electrical current pulses arise from…