Materials Literature
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The adoption of as a new red ‐emitting primary in color television has stimulated investigation of a new class of phosphors obtained by appropriate substitutions in . Substitution of Y 3+ by Gd 3+ and Lu 3+ provides equally efficient hosts for Eu 3 + with no significant spectral differences. Substitution of Y 3+ by La…
Abstract The original fringed micelle model of a crystalline polymer solid assumed two phases, submicroscopical bundled chain crystals embedded in an amorphous matrix. Every macromolecule passed alternately through crystalline and amorphous regions. This model ideally represented the crystallization with highly stretc…
Stress corrosion cracking of α‐brass was studied in nearly neutral ammoniacal copper sulfate. Under the test conditions, this solution produced a thin, adherent oxide film on the brass. Microstructural studies of the fracture surfaces suggest that alternate formation and rupture of this film leads to initiation and pr…
Geometrical shapes of interstices of two types of closest packing of uniform spheres, 1) hexagonal closest packing, 2) face centered cubic closest packing are studied, and the structures of interstices of these two types of packing are used to represent those of the actual foamed elastomers. Equivalent elastic constan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDichloro(phthalocyanino)siliconMichael K. Lowery, Albert J. Starshak, John N. Esposito, Paul C. Krueger, and Malcolm E. KenneyCite this: Inorg. Chem. 1965, 4, 1, 128Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 Janu…
Lundgren, D. G. (Syracuse University, Syracuse, N.Y.), R. Alper, C. Schnaitman and R. H. Marchessault. Characterization of poly-beta-hydroxybutyrate extracted from different bacteria. J. Bacteriol. 89:245-251. 1965.-Poly-beta-hydroxybutyrate (PHB) from different bacterial genera was studied with regard to its crystal…
Summary Phase-equilibrium relations have been determined at 1000 kg/cm 2 water pressure for compositions within the system NaAlSi 3 O 8 -KalSi 3 O 8 -NaAlSiO 4 -KAlSiO 4 in the area adjacent to the temperature minimum. The composition and temperature of the minimum are Ne 50 Ks 19 Qz 31 and 750° ± 7° C respectively. T…
An electron microscope study on the cell wall of the diatom Cylindrotheca fusiformis was carried out using stereoscopic and sectioning techniques. Material prepared by an enzyme treatment or by a mechanical method showed that the wall consists of two major components: a silica shell and organic material. Vapor of hydr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared Study of Adsorption of Ammonia on Dry γ-Alumina1J. B. PeriCite this: J. Phys. Chem. 1965, 69, 1, 231–239Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 January 1965https://pubs.acs.org/doi/10.1021/j100885a034…
The dependence of the Raman-scattered intensity on exciting frequency is investigated theoretically for the case where this frequency is close to an absorption line or absorption band of the scattering crystal. Both spontaneous and stimulated Raman scattering are discussed. For scattering by electronic levels of impur…
Abstract A theoretical model for interstitial liquid flow in a stationary or moving foam was devised by relating the physical structure of the foam to the physical properties of the surfactant and the foam movement. This was accomplished through a differential momentum balance within a typical capillary (Plateau borde…
The Hamiltonian (Pauli approximation) which gives rise to the spinrotation coupling tensor and the electron spin g tensor is set up for a 2Σ polyatomic molecule. A relationship between the spin-rotation interaction and the Zeeman effect is suggested. The magnitudes of those terms which prevent this relationship from b…
Beta‐ray spectroscopy and radiotracer techniques have been used to study the transport of metal and oxygen during anodic oxidation. Both species are mobile during oxide film growth on Al, Nb, Ta, and W, but in Zr and Hf only oxygen transport is observed. Radiotracer measurements showed that the amount of metal dissolv…
Kinetic data for the formation of metal complexes obtained by various methods show that the complex formation of ML from metal ion, M, and ligand, L, can be described in terms of a rapid pre-equilibrium, involving formation of an outer sphere complex M(H 2 O)L, which then loses water in the rate-determining step of in…
A general method for the calculation of orbital energy differences within a partially filled l-shell of a central ion in an inorganic chromophore is described. The angular overlap model covers σ, π and δ anti-bonding (as well as bonding) effects, and it is shown that the consequence of the model is identical with that…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared and Gravimetric Study of the Surface Hydration of γ-AluminaJ. B. PeriCite this: J. Phys. Chem. 1965, 69, 1, 211–219Publication Date (Print):January 1, 1965Publication History Published online1 May 2002Published inissue 1 January 1965https://pubs.acs.org/doi/10.1021/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the Colloidal Hydrated Calcium Silicates. II. Solubility Relationships in the Calcium Oxide-Silica-Water System at 25°S. A. Greenberg and T. N. ChangCite this: J. Phys. Chem. 1965, 69, 1, 182–188Publication Date (Print):January 1, 1965Publication History Pub…
A. W. Johnson and I. T. Kay, J. Chem. Soc., 1965, 1620 DOI: 10.1039/JR9650001620
An investigation of the permeation rate of electrolytic hydrogen through Armco iron single crystals and polycrystals by an electrochemical technique is described. The variation of the permeation rate with cathodic overpotential has been determined in alkaline , alkaline cyanide, acidic , acidic iodide, acidic napthale…
The oxidation of MoSi 2 , Mo 5 Si 3 , and Mo 3 Si has been studied at temperatures of 1300°–2000°K, and at oxygen partial pressures of 2–20 Torr. Below 1970°K, at oxygen pressures around 10 Torr, measurements of the rate of total oxygen consumption vs. time show an initial period of high linear rate, an intermediate r…