Materials Literature
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A p-band theory calculation is reported on a single layer of graphite, the nomenclature and methods of molecular orbital theory being used. Interaction between non-nearest neighbours at increasing distances is included to determine the extent of significant electron interaction. A criterion to determine this limit is…
The photoluminescence (PL) and electroluminescence (EL) from single‐crystal Mn‐doped centered at 580 nm was investigated. The PL was quenched by surface modification with poly(vinylferrocene). The effect of p H and temperature on the EL of in aqueous and butyronitrile solutions upon reduction of peroxydisulfate ion wa…
Positional parameters ( x, y, z ) and anisotropic Debye–Waller factors B ⊥ (normal to the xy plane) and B || (parallel to the xy plane) have been determined for the Fe and Cl atoms in FeCl 3 within the space group R {\bar 3} with a = 6.065, c = 17.42 Å. These are (0, 0, 1/3), B Fe⊥ = 1.75 and B Fe|| = 1.2 Å 2 for the…
We have investigated higher-order packing entropy effects on the fundamental elastic properties of a liquid-density nematic system of hard spherocylinders as a function of molecular geometrical anisotropy by starting with the systematic density-functional formalism. We have constructed the free energy and the direct p…
The polarised absorption and reflectance spectra of the three TCNQ salts pyridinium (TCNQh, triethylammonium (TCNQh and thermally damaged quinolinium (TCNQh indicate that the absorption features are governed by reflection characteristics. The maximum reflectance curve shows a broad minimum which corresponds to a negat…
Abstract It was proved that there are two isomorphic series of mixed crystals in the CeO 2 La 2 O 3 systems from 0 to 14 mol% CeO 2 ‐mixed crystals based on the La 2 O 3 structure and from 32 to 100 mol% CeO 2 ‐mixed crystals based on the CeO 2 structure. The oxides were obtained by co‐precipitation of oxalates, foll…
Abstract The solubilities of a series of symmetrical tetraalkylammonium salts, R4NX (R=CH3–n-C8H17, including i-C4H9 and i-C5H11; X=Cl, Br, I, NO3, and ClO4), in water have been determined over the temperature range between 5 and 45 °C. The solubilities of these salts were found to be strongly dependent upon both the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(Cyclopentadienyl)ruthenium complexes of 3-methoxyestrone. A high-field NMR and x-ray crystallographic studyRobert M. Moriarty, Yi Yin Ku, U. S. Gill, Richard Gilardi, Richard E. Perrier, and Michael J. McGlincheyCite this: Organometallics 1989, 8, 4, 960–967Publication Date…
Moisture layers with low layer conductivity are characterized by low power dissipation, e.g. 50 mW for the epoxy resin model post insulator under investigation. Under those conditions, no temperature-related dry zones appear, but micro partial discharges (PDs) cannot be excluded. The appearance of these discharges dep…
Abstract Orthorhombic α‐S 8 and quenched liquid sulfur have been irradiated by mercury or xenon high‐pressure lamps at temperatures of 2 – 70 K and the radicals produced detected by ESR spectroscopy. Depending on the sample, sample temperature, radiation wavelength, and microwave power three sulfur radicals (α, β, β')…
Abstract A detailed quantitative comparison between thin section electron microscopy, utilizing the chlorosulfonation technique, and the Raman low‐frequency acoustical mode (LAM) in determining the crystallite size distribution in polyethylenes having narrow distributions is made. Three different polyethylene systems…
A multilayer structure is described for use in a number of radiation detectors. The structure consists of alternating layers of metal and amorphous silicon (a-Si). The absorption of radiation mainly occurs in the metal layers, while electron-hole pairs are generated in the a-Si layers by the emitted secondary particle…
A water phase during the travel in long gas transport pipes will accumulate increasing amounts of Fe/sup 2+/ corrosion product. For a pipeline with an unprocessed well stream of gas, liquid hydrocarbon, and condensed water, the Fe/sup 2+/ buildup in the water phase can have a major influence on the corrosion of carbon…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPiezochromism: pressure-induced rearrangements of thermochromic and related copper(II) complexes containing asymmetrically substituted ethylenediamineKevin L. Bray, Harry G. Drickamer, Edward A. Schmitt, and David N. HendricksonCite this: J. Am. Chem. Soc. 1989, 111, 8, 2849…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSustained and damped pH oscillation in the periodate-thiosulfate reaction in a continuous-flow stirred tank reactorGyula Rabai, Mihaly T. Beck, Kenneth Kustin, and Irving R. EpsteinCite this: J. Phys. Chem. 1989, 93, 7, 2853–2858Publication Date (Print):April 1, 1989Publicat…
The phase diagram of the liquid crystal n-propyl-4'-n-decyloxy-biphenyl-4-carboxylate [3(10)OBC] and 4-propionyl-4'-n-heptanoyloxy-azobenzene (PHOAB) binary mixture has been investigated by heat-capacity studies and optical observations. The heat-capacity data reveal a continuous change in the character of the smectic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical and experimental determination of the lithium and sodium superoxide bond dissociation energiesJohn M. C. Plane, B. Rajasekhar, and Libero BartolottiCite this: J. Phys. Chem. 1989, 93, 8, 3141–3145Publication Date (Print):April 1, 1989Publication History Published…
Abstract Strains of Mycobacterium and Nocardia isolated because of their ability to use di(2‒ethylhexyl) phthalate (DEHP) as sole carbon source also grew on diethyl, diisooctyl, and butyl benzyl phthalates. As the two bacteria grew on DEHP, they excreted products that increased the solubility of DEHP and diisooctyl, d…
Work-associated rhinitis and asthma occurred in a subject exposed to methyl tetrahydrophthalic anhydride (MTHPA) used as a curing agent in an epoxy resin system. He displayed bronchial hyperreactivity in provocation with methacholine, as well as skin prick test positivity and specific immunoglobulin E (IgE) serum anti…
A review of the basic experimental results connected with the formation of long-living metastable states in the incommensurate phases of ferroelectric crystals and related phenomena is given. The interpretation and appropriate physical mechanisms underlying the global hysteresis phenomena associated with these states…