Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman frequencies and core size for low- and high-spin nickel porphyrinsDongho Kim, Y. Oliver Su, and Thomas G. SpiroCite this: Inorg. Chem. 1986, 25, 22, 3988–3993Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published iniss…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic and spectroscopic study of pyrazine-bridged iron(II) halide complexesJohn S. Haynes, John R. Sams, and Robert C. ThompsonCite this: Inorg. Chem. 1986, 25, 21, 3740–3744Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published in…
In the intermetallic compound Fe 3 Si there are two non-equivalent Fe sites, one (C) with cubic symmetry and another (T) with tetrahedral symmetry. Impurities from the first transition row show a marked tendency at thermal equilibrium to occupy one or other of the two types of sites preferentially; impurities from the…
Abstract Hardwood fibers of aspen in the form of chemithermo‐mechanical pulp (CTMP) have been used as reinforcement in linear low density polyethylene (LLDPE). The effect of composite treatment (immersion in boiling water, heat exposure at 105°C for seven days or at a temperature of −40°C) on resulting mechanical prop…
Abstract Sorption and transport of several inert gases (He, Ar, N 2 , and CH 4 ) in miscible blends of PMMA and PVF 2 are reported as a function of pressure at 35°C. For each gas, the permeabilities are independent of pressure for all blend compositions. Sorption isotherms are linear for rubbery compositions (PVF 2 ‐r…
Summary Friction and wear between casing and tool joint have been measured on full-scale equipment. The results show that the most important mud property, with respect to lubricity and protection against wear, is its ability to form a film that separates the two steel surfaces. Results from small-scale tests are shown…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectric stimulus-response behavior of liquid-crystalline viologenIwao. Tabushi, Kazuo. Yamamura, and Kazuhiko. KominamiCite this: J. Am. Chem. Soc. 1986, 108, 20, 6409–6410Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published inissu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStrong antiferromagnetic exchange in a bromide-bridged copper dimer, bis(.mu.-bromo)bis[bromobis(tetramethylene sulfoxide)copper(II)]. Structure, susceptibility, and magnetostructural correlationsC. P. Landee and R. E. GreeneyCite this: Inorg. Chem. 1986, 25, 21, 3771–3775Pu…
The sphere lens with a spherical gradient-index (GRIN) was prepared for the first time by two modified suspension polymerization techniques. The index change of the 0.05–3.0-mm diam GRIN sphere was 0.02–0.04, and the index profile was almost quadratic. The optimum condition minimizing the spherical aberration of the G…
Abstract The objective of this investigation is to show that rapid hydrolysis can be achieved by passage of aqueous cellulosic suspensions (2–10% solids) through capillaries followed by sudden decompression and post‐treatment under dilutes acid conditions. Through detailed experimentation within the 200–240°C temperat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTritriptycene: a D3h C62 hydrocarbon with three U-shaped cavitiesAbdollah. Bashir-Hashemi, Harold. Hart, and Donald L. WardCite this: J. Am. Chem. Soc. 1986, 108, 21, 6675–6679Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElastic modulus of isotactic polypropylene in the crystal chain direction as measured by x-ray diffractionChie Sawatari and Masaru MatsuoCite this: Macromolecules 1986, 19, 10, 2653–2656Publication Date (Print):October 1, 1986Publication History Published online1 May 2002Pub…
Abstract The rapid rise in the popularity of the McCrone Micronizing Mill for sample preparation in routine quantitative analytical x‐ray powder diffractometry (XRPD) has led to the present examination of material obtained with the device and a comparison with material produced by the widely used Tema Mill. Specimens…
The teeth of the sea urchin Lytechinus variegatus grow continuously. The mineral phase, a high magnesium calcite, grows into single crystals within numerous compartments bounded by an organic matrix deposited by the odontoblasts. Electron microscopic examination of glutaraldehyde-fixed Ethylene Diamine Tetra acetic ac…
Abstract An X-ray powder diffraction study of a vermiculitized chlorite in an amphibole schist near Limoges, France, shows the following weathering sequence: chlorite → ordered interstratified chlorite/vermiculite → vermiculite. Mössbauer spectroscopy indicates that vermiculitization proceeded by the release of ferrou…
In a chiral smectic C liquid crystal, a bend type deformation of the C-director induces a polarization charge. We have shown that due to the screening effect by impurity ions the free energy of the electrostatic interaction of the polarization charge is renormalized into the distortion free energy density associated w…
A new method for obtaining thin films of doped molecular materials in a complete absence of oxygen is described. It consists in simultaneously subliming under vacuum the electroactive compound—a metallophthalocyanine—and the electron acceptor or electron donor doping agent. The extent of doping is controlled by the re…
Abstract The heat denaturation of pepsinized bovine nonfibrillar and fibrillar collagen was studied by differential scanning calorimetry. For fibrillar preparations that had been rapidly precipitated with stirring at low ionic strength, then resuspended at physiological ionic strength, multiple denaturational transiti…
Lyotropic nematic mesophases doped with different concentrations of ferromagnetic grains are observed in a polarizing microscope. A minimum concentration of the grains is obtained above which a collective behavior of the nematic matrix is observed. The results are discussed in terms of the elastic continuum theory of…
Abstract The clay and bulk mineralogy of soil and till from 26 Adirondack watersheds was studied. The materials consist typically of quartz, K-feldspar, plagioclase, mica, vermiculite, and kaolinite. Talc, smectite, halloysite, and hornblende are present in some samples. The clay fraction of the soils is composed pred…