Materials Literature
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Samples of crystalline hydroxyapatite [Ca5OH(PO4)3 HA] were prepared by precipitation from aqueous media under a variety of experimental conditions (temperature, concentration of reagents, rates of addition of the reagents, and seeding). The resultant products showed a wide range of particle sizes, i.e., specific surf…
Abstract Aromatic polyphosphonates of high molecular weights were prepared from phenylphosphonic dichloride and bisphenols having rigid ring structures by the two‐phase polycondensation in organic solvent–aqueous alkaline solution system with phase‐transfer catalyst at 0°C or below. The effects of reaction solvent and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic route to [Fe6S9(SR)2]4- clusters (R = alkyl). Their spectroscopic and magnetic properties and the solid-state structures of [Fe6S9(SCH2Ph)2]4- and [(Fe6S9(SMe)2)2Na2]6-Henry Strasdeit, Bernt Krebs, and Gerald HenkelCite this: Inorg. Chem. 1984, 23, 13, 1816–1825Pub…
Measurements on two systems (each with porosity φ=0.38) show that the ultrasonic response of fluid saturated granular composites is not easily predicted in terms of the acoustic properties of the individual constituents. In particular, systems comprised of unconsolidated glass and Plexiglas grains exhibit anomolous be…
Applying the theoretical results outlined in the first paper of this series, numerical estimates have been obtained for density fluctuation, Raman, and concentration fluctuation scattering losses in a number of materials which are under consideration as candidates for ultralow loss fiber-optic applications. The materi…
Isocitrate dehydrogenase kinase can use ATP but not other nucleoside triphosphates as a phosphate donor. It responds hyperbolically to both ATP and isocitrate dehydrogenase. The kinase is inhibited sigmoidally by low concentrations of DL-isocitrate and hyperbolically by ADP, AMP, NADPH, phosphoenolpyruvate and several…
The first measurements of infrared birefringence of liquid crystals are reported. Continuous birefringence spectral data were calculated from measurements of phase differences which occur when monochromatic polarized light propagates through a medium with an anisotropic refractive index. It was found that molecular ab…
We present a simple derivation of the mean square end-to-end distance 〈R2〉 of a linear flexible chain as a perturbation series in the dimensionless excluded volume parameter zd. Our results, to orders six and four in space dimension d=3 and 2, respectively, are 〈R2〉= Ll[1+ (4)/(3) z3−2.075 385 396 z23+6.296 879 676 z3…
Abstract Chemical activity diagrarns, prepared to illustrate the properties expected if mixed-layer mont-morillonite/illite is regarded as a solid solution, are compared to those derived from a treatment of these materials as a mixture of two phases. If the system is a solid solution, the coexisting aqueous solution s…
Abstract An experimental study of the development of phase morphology, rheological properties, and processing behavior of mechanical blends of a polystyrene (PS) and a high density polyethylene (PE) is presented. Phase morphologies were determined by scanning electron microscopy for (i) products prepared in a screw ex…
We consider two ways to calculate the self-diffusion coefficient of interacting Brownian particles. The first approach is based on the calculation of the mean square displacement of a Brownian particle starting from the Smoluchowski equation. In the second approach the self-diffusion coefficient is obtained as the pro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, proton NMR, and structural characterization of binuclear ruthenium porphyrin dimersJames P. Collman, Craig E. Barnes, Paul N. Swepston, and James A. IbersCite this: J. Am. Chem. Soc. 1984, 106, 12, 3500–3510Publication Date (Print):June 1, 1984Publication History…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA model for the metal-support effect enhancing carbon monoxide hydrogenation rates over platinum-titania catalystsM. Albert Vannice and Chakka SudhakarCite this: J. Phys. Chem. 1984, 88, 12, 2429–2432Publication Date (Print):June 1, 1984Publication History Published online1…
A cathodoluminescence detector attached to a transmission electron microscope has been used to record visible optical-emission spectra from individual dislocations of known type in type IIb diamond over a range of temperatures. The polarization of the emission has also been determined from individual dislocations and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the thermal decomposition of benzenesulfinyl azideTom J. Maricich, Christos N. Angeletakis, and Ragnvald MjangerCite this: J. Org. Chem. 1984, 49, 11, 1928–1931Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility of magnesium hydrogen phosphate trihydrate and ion-pair formation in the system magnesium hydroxide-phosphoric acid-water at 25.degree.CR. M. H. Verbeeck, P. A. M. De Bruyne, F. C. M. Driessens, and F. VerbeekCite this: Inorg. Chem. 1984, 23, 13, 1922–1926Publicat…
Abstract not Available.
Abstract Laboratory tests have been developed that evaluate realistically the protective performance of clothing materials and garments. Test conditions are chosen to stress the high temperature resistance of materials in the same manner as in an industrial flash fire exposure. A second degree burn in human tissue is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA review of nonlinear optical organic materialsSantanu BasuCite this: Ind. Eng. Chem. Prod. Res. Dev. 1984, 23, 2, 183–186Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June 1984https://doi.org/10.1021/i300014a001RIGHTS…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman study of aqueous rare earth nitrate solutions in liquid and glassy statesH. Kanno and J. HiraishiCite this: J. Phys. Chem. 1984, 88, 13, 2787–2792Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June 1984https://pub…