Petrology and origin of some phosphorites from the South African continental margin
Abstract Phosphatization of limestones on the Agulhas Bank, southern tip of Africa
Materials Literature
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Modes of inhibiting electrode processes (corrosion included) and their experimental discrimination. I. Definition, nomenclature and classification of modes of inhibition in electrochemical electrode reactions
Abstract As to the modes of inhibiting electrode processes, it belongs to the present tasks of the Working Party “Inhibitors” of the European Federation Corrosion first to elaborate valid formulations in definition, nomenclature and classification and second to present a review on methodology for investigating inhibit…
Perfluoroalkylene‐linked aromatic polyimides. I. Synthesis, structure, and some general physical characteristics
Abstract This paper describes the preparation of a series of novel perfluoroalkylene‐ and ether‐linked aromatic polyimides. Depending on the nature of the precursor diamine, the polyimides were prepared by either melt or solution techniques, the latter via the corresponding poly(amic acids). The polymers were characte…
Analysis of theFe3+−VOCenter in the Tetragonal Phase of SrTiO3
The paramagnetic resonance spectrum of the iron oxygen-vacancy (${\mathrm{Fe}}^{3+}\ensuremath{-}{V}_{o}$) pair in the tetragonal $\frac{I4}{\mathrm{mcm}}$ phase of SrTi${\mathrm{O}}_{3}$ at 78 \ifmmode^\circ\else\textdegree\fi{}K is analyzed in detail. The spectra observed at $K$ band are fully accounted for using th…
The contribution of grain boundary sliding to axial strain during diffusion creep
Grain boundary sliding is necessary during diffusion creep to maintain continuity across the grain boundaries. In this paper it is shown, by use of a two-dimensional hexagonal array, that grain boundary sliding will contribute additional axial strain to the specimen as predicted by R. N. Stevens (1971). It is shown, h…
X-ray Difraction and Polymorphism of Smectic Liqid Crsystals. II. D and E Modifications
The X-ray patterns of two new smectic modifications (smectic D and Smectic E) are investigated. The D-modification is potically isotropic. A cubic structure is presumed. In the E-modification the pattern exhibits three sharp outer rings besides the inner irng, which points to a higher order compared withthe A, B and C…
Shale petrology by electron microprobe; pyrite-chloride relations
Abstract Use of microprobe in analyzing mineralogical-textural relationships in fine-grained materials not readily studied by optical methods
Domains in SmCo5 at Low Temperatures
Domain spacing in SmCo5 is observed to increase by a factor of 1.5 at 78 K as compared with the spacing at room temperature. This indicates a difference in domain wall energy, which may explain the experimentally found difference in coercive force.
Synthesis, stereochemistry, and mechanism of formation of mixed bis(dithiolato)nickel dimers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, stereochemistry, and mechanism of formation of mixed bis(dithiolato)nickel dimersAlvin Hermann and Richard M. WingCite this: Inorg. Chem. 1972, 11, 6, 1415–1420Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 J…
The identification of twins from intensity statistics
The N(z) distribution, the Wilson ratio and variance values have been determined for the case of twinned crystals where non-equivalent reflexions coincide exactly. The results have been applied to a practical example. The structural reasons for twinning may require that only reflexions occurring at relatively large Br…
Reactions and Technological Properties of Sulfur-Treated Asphalt
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions and Technological Properties of Sulfur-Treated AsphaltUgo Petrossi, P. L. Bocca, and Pierpaolo PacorCite this: Ind. Eng. Chem. Prod. Res. Dev. 1972, 11, 2, 214–219Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1…
Iron Compounds Formed by the Aerial Oxidation of Ferrous Salt Solutions
Masao Kiyama, Toshio Takada; Iron Compounds Formed by the Aerial Oxidation of Ferrous Salt Solutions, Bulletin of the Chemical Society of Japan, Volume 45,
Multiple melting transitions in natural rubber
Abstract Detailed studies of the fusion of natural rubber, following isothermal crystallization, has revealed a hitherto undetected low temperature transition which depends on the crystallization temperature. This transition is shown to be a melting phenomenon which is not caused by any polymorphic structural changes.…
Characterization of a d7 iron system. Tetraphenylporphineiron(I) anion
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of a d7 iron system. Tetraphenylporphineiron(I) anionIrwin A. Cohen, David Ostfeld, and Barry LichtensteinCite this: J. Am. Chem. Soc. 1972, 94, 13, 4522–4525Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue…
POTASSIUM‐ALUMINIUM EXCHANGE IN ACID SOILS I. KINETICS
Summary A kinetic method is described and investigated for determining exchangeable Al in acid soils using M NH 4 Cl solutions the pH and leaching rate of which was critical for obtaining accurate and reproducible values. Molar concentrations of ammonium acetate displaced at least part of the Al chelated to functional…
Thermal Analysis of Pressurized Water Reactors
"Thermal Analysis of Pressurized Water Reactors." Nuclear Science and Engineering, 48(2), p. 233
Structural evolution of chromia
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural evolution of chromiaP. Ratnasamy and A. J. LeonardCite this: J. Phys. Chem. 1972, 76, 13, 1838–1843Publication Date (Print):June 1, 1972Publication History Published online1 May 2002Published inissue 1 June 1972https://pubs.acs.org/doi/10.1021/j100657a009https://d…
Intragranular growth of marine aragonite and Mg-calcite; evidence of precipitation from supersaturated seawater
Abstract Textural types and precipitation mechanisms in samples from the Caribbean and Mediterranean regions
USE OF DILUTE CALCIUM CHLORIDE FOR THE EXTRACTION OF PLANT-AVAILABLE ALUMINUM AND MANGANESE FROM ACID SOIL
A method is proposed for the simultaneous extraction of plant-available Al and Mn from acid soils that consists of shaking the soil in 0.02 M CaCl 2 (1:2 ratio) for 1 hr. The method was developed by comparing the amounts of these elements extracted by different concentrations of the salt and by different extraction ti…
Optical and Dielectric Properties of Water in the Vacuum Ultraviolet
The optical and dielectric properties of water in the vacuum ultraviolet are presented and discussed. Optical constants at energies up to 14.6 eV were obtained by a Kramers-Kronig analysis using reflectances measured in this study between 9.2 and 14.9 eV and reflectances calculated from data in the literature below 9.…