Materials Literature
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Abstract Polymers with conductivities from 8.6 × 10 0 to 7.3 × 10 −6 (ω cm) −1 at 2–12 kbar were prepared by zinc‐chloride‐catalyzed condensation of polycyclic aromatic hydrocarbons, heterocycles, and quinones with pyromellitic dianhydride, tetrabromophthalic anhydride, and tetrachlorophthalic anhydride at 450°C. Thes…
The piezoelectric resonance method was adopted in order to measure piezoelectric and elastic constants of polyvinylidene fluoride films over the temperature range from −40 to 60 °C and at pressure up to 3 kbar. We have shown that the glass transition temperature increases with pressure, dTg/dP being approximately equa…
Atom Probe Field-Ion Microscopy and Transmission Electron Microscopy have been used to characterize the microstructure and to determine the changes that occur during long-term low-temperature aging of primary coolant pipes used in pressurized water nuclear reactors. The cast CF 8 type stainless steel forms a mixture o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe mean excitation energy for stopping power I, the Bragg rule, and chemical and phase effects. Application of a statistical treatment to the determination of I for chemically bound particlesEfstathios KamaratosCite this: Chem. Rev. 1984, 84, 6, 561–576Publication Date (Pri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of proton ionization from poly(vinylammonium salts)Edwin A. Lewis, Thomas J. Barkley, R. Renee Reams, Lee D. Hansen, and Thomas St. PierreCite this: Macromolecules 1984, 17, 12, 2874–2881Publication Date (Print):December 1, 1984Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structural characterization of a cationic rhenium selenoxoformaldehyde complexFred B. McCormickCite this: Organometallics 1984, 3, 12, 1924–1927Publication Date (Print):December 1, 1984Publication History Published online1 May 2002Published inissue 1 December 1…
A family of variable-index spherically symmetric lenses is presented that provide the light focusing at two (or three) points, subject to an appropriate division of the aperture.
A procedure which permits the evaluation of the stress-strain field in an elastomeric seal is presented. Such a procedure is based upon a mechanical modeling of the elastomer and on the employ of finite elements which can cope with high strains. Finally, the above-mentioned procedure is checked against experimental re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleSingle-crystal EPR spectra of tetra-n-butylammonium bis(isotrithione-3,4-dithiolato)cuprate(II) (copper-63)Joachim Stach, Reinhard Kirmse, Wolfgang Dietzsch, Ruth Maria Olk, and Eberhard HoyerCite this: Inorg. Chem. 1984, 23, 26, 4779–4780Publication Date (Print):December 1, 198…
The solubility of 17 beta-oestradiol (E2) in aqueous solutions of polyethylene glycol (PEG) 400 has been measured at 35 degrees C. Up to 80% w/w PEG the solubility data conform to a log linear equation ln S = ln Sw + f sigma where S is the E2 concentration in the water/cosolvent mixture, Sw is E2 solubility in water,…
Measurements of Mössbauer absorption spectra of 57 Fe : La 2 Ni O 4 at 297, 77, and 4.2 K provide evidence, at the lowest temperatures, of magnetic order in a sample containing 57 Fe 3 + -ion impurities and some La 2 + n Ni 1 + n O 4 + 3 n intergrowth. Mössbauer emission spectra of 57 Co : La 2 Ni O 4 at 77 and 4.2 K…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTByproduct identification in the terephthalic acid production process and possible mechanisms of their formationPaolo Roffia, Pierangelo Calini, Luigi Motta, and Sergio TontiCite this: Ind. Eng. Chem. Prod. Res. Dev. 1984, 23, 4, 629–634Publication Date (Print):December 1, 19…
The bremsstrahlung cross section has been studied by measuring the activity induced in $^{63}\mathrm{Cu}$ by electrodisintegration and when thin radiators of Cu, Mo, Ta, and Th were placed in the electron beam just ahead of the target. The electron energies were varied from 13.5 to 60 MeV for the electrodisintegration…
Natural and synthetic fibres and fabrics have been modified in cold plasma conditions in order to impart new qualities to support materials. Both static and dynamic installations designed to this aim are presented. Improved hydrophilicity, dyeability and flamme retardancy properties were achieved by grafting with eith…
Abstract The anodic oxidation of NH 2 OH on Pt in neutral and acid solutions was studied using CV, RRDE and Mass Spectroscopic Cyclic Voltammetry. Thus, the i /ϕ‐curves obtained could be correlated to the rates of formation of the gaseous products N 2 , N 2 O t NO and NO 2 . Three anodic waves were distinguished, each…
ABSTRACT The initial epivalve of Rhoicosphenia curvata (Kütz.) Grun. differs from vegetative valves in having a strongly arched section, a wide hyaline marginal strip, no pseudosepta, an unthickened margin, and a terminal raphe fissure at the head pole. The initial epivalve is of the D type, with short raphe fissures.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray and neutron diffraction study of [P(CH2C6H5)(C6H5)3]+[HIr4(CO)11]-Robert Bau, Michael Y. Chiang, Chiau Yu Wei, Luigi Garlaschelli, Secondo Martinengo, and Thomas F. KoetzleCite this: Inorg. Chem. 1984, 23, 26, 4758–4762Publication Date (Print):December 1, 1984Publicati…
Abstract Extended x‐ray absorption fine‐structure (EXAFS) measurements were used to determine the near‐neighbor environment of the neutralizing cation in several ionomer system. The observed structure is compared to that existing in analogous low‐molecular‐weight crystalline salts. A wide variety in the degree of loca…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCofacial assembly of partially oxidized metallomacrocycles as an approach to controlling lattice architecture in low-dimensional molecular solids. Synthesis and properties of cofacially joined silicon and germanium hemiporphyrazine polymersCarl W. Dirk and Tobin J. MarksCite…
Abstract Chloroform is decomposed by irradiation with ultrasonic waves to yield a large number of products. The major products are various unsaturated compounds. Decomposition occurs only in the presence of a monoatomic‐ or diatomic gas. Free radicals and carbenes are postulated as intermediates of sonolysis which can…