Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleOrbital reversal in (oxalato)copper(II) linear chainsJ. J. Girerd, O. Kahn, and M. VerdaguerCite this: Inorg. Chem. 1980, 19, 1, 274–276Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://pubs.acs.org/doi/…
Abstract The initial stage of the suspension polymerization of poly(vinyl chloride) (PVC) is characterized by the formation of colloidally stable micron‐sized grains of PVC inside the polymerizing ca. 150 μm vinyl chloride droplets. The fate of these micron‐sized PVC grains depends upon the agitation conditions. If no…
Abstract High pressure CO 2 sorption data in polycarbonate (PC) are reported as a function of temperature and thermal history. The bulk physical structural changes produced by annealing at 125 and 135°C were monitored by density and thermal property changes. The sorption data are analyzed by the dual sorption model wh…
The quantitative determination and depth profiling of fluorine in the surface region of various substrates using nuclear reaction microanalysis was studied. Differential cross sections and excitation functions for the reaction 19 F(p, α 0 ) 16 O and 19 F(p, α γ) 16 O were investigated in great detail, especially in th…
R. G. Godden and D. R. Thomerson, Analyst, 1980, 105, 1137 DOI: 10.1039/AN9800501137
Abstract The isothermal crystallization of isotactic polypropylene at different temperatures in the presence of fibrous substrates has been investigated. It is shown that preferential transcrystalline growth occurs at the fiber surface and that changes in nucleation density in the bulk material adjacent to the fibers…
Twenty‐one mineral soils of different physicochemical properties were used in this study. Soil suspensions, 30 grams of soil in 150 ml of distilled water, were shaken for 96 hours at 200 rpm and 25±1°C. The activity of H4SiO4°, maintained in soil suspensions after shaking for 96 hours, was higher than quartz, cristoba…
A pyrolysis-gas chromatograph with flame photometric detection is used to determine the levels of certain nonvolatile, aliphatic sulfur-containing additives in polymers. The additive is extracted from the polymer with a suitable solvent, 2 μl of the solution is placed on the pyrolyzer ribbon, and the solvent evaporate…
(Ni, Co)3Al4 is a ternary phase in the Al-Ni-Co system, the homogeneous range at room temperature being 55-58.5 A/0 Al, 26-35 A/0 Ni, and 10-15.5 A/0 Co. It belongs to the cubic system with space group Oh10-Ia3d. There are 112 atoms per unit cell, the lattice spacing at room temperature being α = 11.3962?.This structu…
A practical technique is presented for the numerical solution of general three-dimensional electrodynamic field problems. Circuit models are derived separately for the electric and magnetic parts of the field. Conventional network-analysis techniques are then developed to isolate the independent closed paths that link…
Cascades of atomic collisions created by high energy particles as a result of irradiation of solids by them are considered. The solution of the problem is based on the investigation of the Boltzmann stationary kinetic equation for moving atoms. For this equation a model scattering indicatrix is constructed with an arb…
Some day hydrogen may be used as a viable energy storage and transport medium within the United States. Hydrogen gas may be used to dilute and extend our present methane supply as a blend or may even be used in its pure elemental form as a primary fuel. Independent of the methods of production, storage, and distributi…
Abstract The dehydrogenation of cyclohexane to benzene on a platinum‐rhenium/aluminium oxide (Pt‐Re/Al 2 O 3 ) catalyst was investigated using both pulse and continuous flow techniques with hydrogen and inert (N 2 , He, Ar) diluents at the following conditions: 1 and 4 atm (1 atm = 101 kPa) total pressure and 432–623…
Chemical shifts, ΔE, of the K-absorption discontinuity in several compounds of copper possessing formal oxidation states between 0 and III have been measured. The shifts show a parabolic dependence on the formal oxidation state as well as on the effective atomic charge, q, on copper. Anomalous chemical shifts shown by…
Al substituted barium ferrite particles BaFe12-xAlxO19 with 0? x ?0.8 have been prepared by ball milling method. X-ray diffraction (XRD) has shown that the average crystallite size for all samples under investigation is in the range 66 76 nm.
The measured (apparent) specific activities of immobilized lactate dehydrogenase, malate dehydrogenase, glucose dehydrogenase, alkaline phosphatase and chymotrypsin decrease with increasing activity loading and increase with decreasing particle diameter and with increasing substrate concentration. The observed inactiv…
Abstract The structure of monoclinic Se 2 O 5 , S. G. P2 1 /c, Z = 4, was solved by direct methods and refined by an anisotropic full matrix least‐squares to R = 0.116 for 855 densitometer intensities. The structure consists of zig‐zag chaines [Se(O)OSe(O) 2 O] n with alternating Se(IV) and Se(VI) atoms. Each Se…
The removal of methyl iodide by absorption onto silver mordenite was studied using a simulated off-gas from the fuel dissolution step of a nuclear fuel reprocessing plant. The methyl iodide absorption of silver mordenite was examined for the effects of NO/sub x/, humidity, iodine concentration, filter temperature, and…
Lines emitted from levels of the 3s(2)3p(4)4s configuration to the ground levels 3s(2)3p(5) of Fe X are observed in both solar and laboratory plasma. Their relative intensities are five to six times stronger than those calculated assuming that the coronal equation is valid. Additional population processes - cascades f…
Abstract Chalcophyllite, Cu 9 Al(AsO 4 ) 2 (SO 4 ) 1.5 (OH) l2 · 18 H 2 O, crystallizes in space group R [unk] with a hex = 10.756 and c hex = 28.678Å. The structure was determined by Patterson and Fourier methods and refined by the least-squares technique to a final R index of 0.056. The dominant structural feature i…