Materials Literature
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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…
The effect of surface treatment in surface stabilized ferroelectric liquid crystal(SSFLC) cells on the smectic layer structure was studied by X-ray diffraction. The surfaces of glass plates were coated with polyimide to produce low- and high pretilt cells. Two different types of diffraction patterns were obtained at r…
The search for new organic conductors has led to a broadly variable class consisting of the radical anion salts of naphthalenetetracarboxylic dianhydride and diimide. The X-ray structure analysis of the complex 1 (single crystal conductivity σ20°C = 10 S cm−1) revealed a stacking of anionic units characteristic of one…
Possible pH variations during crystallization of biological macromolecules by the vapor diffusion method have not been taken into account in most experiments so far reported. The present study demonstrates that when ammonium sulfate is used as the precipitant, pH changes occur due to ammonia transfer following ammoniu…
Abstract The infrared (IR) spectra of almandine-grossular and almandine-pyrope garnet solid solutions have been measured using the powder method. Frequency shifts of a band related to internal vibrations associated with the 8-co-ordinate dodecahedral site are nonlinear in almandine-grossular garnets and mimic the form…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1:1 Adducts of lead(II) thiocyanate with 1,10-phenanthroline and 2,2',6',2"-terpyridineLutz M. Engelhardt, Brenda M. Furphy, Jack M. Harrowfield, Jennifer M. Patrick, and Allan H. WhiteCite this: Inorg. Chem. 1989, 28, 7, 1410–1413Publication Date (Print):April 1, 1989Public…
Abstract A kaolinite-pyridine intercalation compound was prepared using hydrated kaolinite as an intermediate. Hydrated kaolinite having a basal spacing of 10 Å was treated with pyridine to form a well-ordered intercalation compound having a basal spacing of 12.0 Å. Infrared spectroscopy indicated the presence of hydr…
Kupferglimmer, CU3Ni2−x SbO6−x where x = 0.1–0.2, occurs in copper anodes of the CCR Division of Nor and a Minerals Inc. that contain >0.30% Ni and > 200 ppm Sb. The associated anode slimes are also kupferglimmer-bearing. The kupferglimmer in the CCR circuit shows a significant substitution of Sn for Sb, and most of t…
The adsorption of uranium and thorium from aqueous solutions by montomorillonite and vermiculite has been studied. The uranium and thorium concentration of the solutions varied between 100 and 2000 ppm. The behaviour of vermiculite as adsorbent of uranyl ions was found to be identical to montmorillonite, whereas the q…
Abstract A comparison of crystallite thickness distributions, as obtained from thin section electron microscopy, small‐angle x‐ray scattering, and low‐frequency Raman acoustical model (LAM), is discussed in detail. It is shown with the aid of a large number of examples that a reliable numerical estimate of crystal thi…