Variation of surface area during the thermal decomposition of solids
D. Nicholson, Trans. Faraday Soc., 1965, 61, 990 DOI: 10.1039/TF9656100990
Materials Literature
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Solubility Measurements in the System CaSO4-NaCl-H2O at 35 , 50 , and 70 Cand one atmosphere Pressure
The solubilities in the system CaSO 4 –NaCl–H 2 O, at 1 atm pressure and 35°, 50°, and 70°C, have been determined by approaching the solubility curves from both the undersaturation and supersaturation sides. The experimental runs are of long duration, as much as 3 months; these rates should be commensurate with those…
Influence of CaCO 3 on the Hydration of 3CaO·Al 2 O 3
The influence of CaCO 3 on the hydration of 3CaO Al 2 O 3 containing about 90% C 3 A is studied with compacts of their mixtures proportioned to 0, 2.5, 10, 20, and 50 wt% CaCO 3 . The compacts are exposed to H 2 O in liquid and in vapor phase, the attendant expansion being measured as a function of time. Differential…
Boron: Another Form
A hitherto undescribed form of boron can be prepared by subjecting ordinary forms of boron to pressures exceeding about 100 kilobars and temperatures between about 1500 degrees to 2000 degrees C. The new form has a density of about 2.52 g/cm(3) and yields a characteristic DeBye-Scherrer pattern. No large crystals have…
Neutron irradiation damage in molybdenum
The technique of transmission electron microscopy has been used to study neutron irradiation damage and its behaviour on annealing in molybdenum. Micro-hardness tests were carried out on all specimens before thinning to obtain some indication of the relation between structural effects and the mechanical properties. Th…
Adsorption of Monomeric and Polymeric Amino Corrosion Inhibitors on Steel
The adsorption of 4‐ethylpyridine, 4‐ethylpiperidine, and very low molecular weight poly (4‐vinylpyridines) was studied in cyclohexane solutions containing hydrogen reduced steel powder. Isotherms were obtained for the monomers at 30°C. They show that an amount equivalent to monolayer formation is adsorbed at equilibr…
Rare Earth Activated Phosphors Based on Yttrium Orthovanadate and Related Compounds
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…
Crystalline character in polymers
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…
On the Initiation and Growth of Stress Corrosion Cracks in Tarnished Brass
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…
Deformations of Foamed Elastomers
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…
Dichloro(phthalocyanino)silicon
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…
Characterization of Poly-β-Hydroxybutyrate Extracted from Different Bacteria
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…
Phase-equilibrium studies in the system NaAlSiO4 (nepheline)–KAlSiO4 (kalsilite)–SiO2-H2O
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…
STUDIES ON THE BIOCHEMISTRY AND FINE STRUCTURE OF SILICA SHELL FORMATION IN DIATOMS
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…
Infrared Study of Adsorption of Ammonia on Dry γ-Alumina1
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…
Theory of the resonance Raman effect in crystals
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…
A study of interstitial liquid flow in foam. Part I. Theoretical model and application to foam fractionation
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 relationship between electron spin rotation coupling constants andg-tensor components
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…
The Migration of Metal and Oxygen during Anodic Film Formation
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…
The Kinetics and Mechanism of Formation of Metal Complexes
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…