Materials Literature
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Specimens of nacre from the pearl oyster Pinctada margaritifera were loaded in bending to various fractions of the load needed to cause fracture. For a small number of cycles, less than about 1000, no changes in compliance or strength were found if the load was less than about 60% of the load necessary to cause failur…
Abstract Primary amine and pyridine‐initiated polymerizations of L‐proline‐ N ‐carboxyanhydride (Pro‐NCA) at 20 or 100°C yield exclusively or predominantly 10 3 ‐helices. Only primary amine‐initiated polymerizations in 1,4‐dioxane at 100°C result in partial formation of 3 1 ‐helices. The stability of both 10 3 ‐ and 3…
In order to estimate the influence of the helium pressure on the corrosion of ferritic and austenitic materials, tests were carried out under 2 absolute bar in a circuit without helium recirculation and under 50 bar in the AIDA loop. In both cases the partial pressures of impurities were 1.500, 50, 450, and 50 μatm fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCobalt-59 NMR of a cobalt(III) spin-crossover compoundGil Navon and Wolfgang KlaeuiCite this: Inorg. Chem. 1984, 23, 17, 2722–2725Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August 1984https://pubs.acs.org/doi/10.1…
Article Die Kristallstruktur von Na4CaSi3O9 und dessen strukturelle Beziehungen zu K4SrGe3O9 und Ca3Al2O6 was published on August 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 166, issue 1-4).
Hannelore Håkansson, R. Ross, (755)-(757) Proposals to Designate Conserved Types for Cymbella C. Agardh and Cyclotella (Kützing) Brébisson, and to Conserve Rhopalodia O. Müller against Pyxidicula Ehrenberg (All Bacillariophyceae), Taxon, Vol. 33, No. 3 (Aug., 1984), pp. 525-531
Large errors are possible in critical-angle measurements of the refractive index of optical absorbers. These arise from the dependence of the reflectivity and transmissivity of a plane optical interface on the imaginary part of the complex relative refractive index. The errors are calculated directly from the Fresnel…
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More
Abstract Experimental techniques have been developed to produce and measure large amplitude one dimensional compression and shear waves in a polyurethane elastomer (Solithane 113). Experimental measurements consisted of time‐resolved compression and shear amplitude measurements at different distances from the impact s…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation U. Bertocci, F. I. Thomas, E. N. Pugh; Technical Note: Stress Corrosion Cracking of Brass in Aqueous Ammon…
Abstract CsCu 2 Cl 3 und CsCu 2 Br 3 wurden auf trockenem Wege durch Synproportionierung von Gemengen CsX/2 CuX (X = Cl, Br) bzw. CsCuCl 3 mit der Gefäßwand eines Cu‐Bömbchens als metallischem Substrat in Form von Einkristallen erhalten. Es ist für CsCu 2 Cl 3 (CsCu 2 Br 3 ): a = 950,75(9) (987,3(1)), b = 1189,8(2) (1…
The electron density distribution in a crystal of MnTiO3 has been investigated with the single-crystal X-ray diffraction method. A small amount of partial disorder was observed in the cation arrangement of the crystal examined. Deformation densities were observed around the Mn 2+ ion and these are presumed to be due t…
The hot wire method for the measurement of thermal conductivity is generalised to the configuration where the wire separates the half-spaces of homogeneous materials, having different thermal conductivities and diffusion constants. This configuration has several advantages since it enables the construction of a measur…
Abstract We report polarized photon correlation measurements of bulk poly(phenylmethyl siloxane) (PPMS) with a molecular weight of about 2500 at different pressures from 1 to 1750 bar and temperatures between 269 and 308 K. In the Frequency range accessible by present‐day digital correlators, the time correlation func…
Abstract Tarnishing layers grown on copper exposed to air contaminated by traces of sulfur dioxide and/or hydrogen sulfide were detected by a coulometric and characterized by a chemical method. Depending on the nature of the corrosive gas, or on the use of a gas mixture, it was found that sulfate, sulfide, oxides or a…
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Abstract Raman and infrared vibrational spectra have been recorded for o ‐phthalic acid as a single crystal, as a powder and in solution. The proposed assignment of the observed frequencies was made on the basis of a normal coordinate analysis and symmetry considerations of the crystal spectrum, which allowed the sepa…
Abstract In this article we review the synthesis and morphology and the physical and mechanical properties of two‐component interpenetrating polymer networks (IPNs) from polyurethane and epoxy polymers; the corresponding pseudo‐IPNs and grafted IPNs are also discussed. A comparison was made of full IPNs, pseudo‐IPNs,…
The Raman spectra of 2H–NbS 2 and 2H–TaS 2 have been analyzed in terms of a valence-force-field (VFF) model that incorporates four parameters. Analytic expressions for the Brillouin-zone-centre phonon frequencies have been obtained from the model and used in conjunction with the Raman frequencies to evaluate the four…
Several spectroscopic techniques are used to investigate the stoichiometry and properties of ATP complexes with lanthanide(III) (Ln(III)], ions. The ATP2-lanthanide(III) complex predominates at millimolar ATP levels and dissociates to the 1:1 complex with a Kd of 300 +/- 50 microM for the Eu(III) case. Two independent…