Reactivation of a supported gold catalyst for acetylene hydrochlorination
A novel high activity, carbon supported, gold catalyst for acetylene hydrochlorination which can be successfully reactivated by HCl treatment is reported.
Materials Literature
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Dynamic Preisach models of hysteresis
Novel Preisach-type models of hysteresis are introduced. Their distinctive feature is their ability to describe dynamic properties of hysteresis nonlinearities. The identification problem of fitting dynamic Preisach models to experimental data is discussed. Some recommendations concerning numerical implementation of t…
Foam Rheology: III. Measurement of Shear Flow Properties
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Saad A. Khan, Carol A. Schnepper, Robert C. Armstrong; Foam Rheology: III. Measurement of Shear F…
Electrostrictive strain and pyroeffect in the region of phase coexistence in Na0.5Bi0.5TiO3
Local maxima and other singularities distinguish the temperature range 200-320°C in the electrostrictive versus temperature graph of Na0.5Bi0.5TiO3, known from other experiments as a region of coexistence of phases. Investigation of the pyroeffect in virgin Na0.5Bi0.5TiO3 single crystals reveals the existence of polar…
Reduced halides of the rare-earth elements
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduced halides of the rare-earth elementsGerd MeyerCite this: Chem. Rev. 1988, 88, 1, 93–107Publication Date (Print):January 1, 1988Publication History Published online1 May 2002Published inissue 1 January 1988https://pubs.acs.org/doi/10.1021/cr00083a005https://doi.org/10.1…
Structure of skin layer in injection‐molded polypropylene
Abstract The structure of skin layer in injection‐molded polypropylen which displayed a clear two‐phase structure of skin and core has been studied by means of wide‐angle x‐ray diffraction, small‐angle x‐ray scattering, melting behavior, density, dynamic viscoelasticity, and tensile test. In skin layer, the c‐axis and…
The selection of experimental conditions in temperature-programmed reduction experiments
The effect of experimental conditions on temperature-programmed reduction (t.p.r.) profiles has been studied. In the case of t.p.r. curves that include several reduction steps an inadequate selection of these parameters leads to distorted profiles; these distortions may produce a complete loss of resolution for the di…
Insulators for High Voltages
This book provides a guide to the whole field of high voltage insulators as used in electrical power networks, traction and production. It covers historical development of the shapes - sometimes strange ones - of modern types, describes the principles materials both ceramic and polymeric and their fabrication, explain…
Molybdenum oxide bronzes with quasi-low-dimensional properties
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolybdenum oxide bronzes with quasi-low-dimensional propertiesMartha GreenblattCite this: Chem. Rev. 1988, 88, 1, 31–53Publication Date (Print):January 1, 1988Publication History Published online1 May 2002Published inissue 1 January 1988https://pubs.acs.org/doi/10.1021/cr000…
Model for Long‐term Phosphate Reaction Kinetics in Soil
Abstract A simplified reaction kinetics model for long‐term P‐sorption in soils receiving large quantities of P‐rich animal manure is presented. Results from soil analyses for samples taken in 84 fields in nine different soil types indicate that the oxalate extractable P provides a good estimation of total P. Sorption…
Generalized Preisach model of hysteresis
The model has the following advantages over the classical Preisach (1935) model. First, it relaxes the congruency property of the classical model, which results in a broader area of applicability. For example, the hysteresis loops exhibited by the Stoner-Wohlfarth (1948) magnetic particles can be described by the nonl…
Advances in the Synthesis of Iodoaromatic Compounds
All articles of this category Iodoaromatic compounds are useful synthetic reagents for fine organic synthesis. Advances in the synthesis of aromatic iodo derivatives of various classes by the Sandmeyer reaction, direct iodination, iododethallation, and other methods are examined. Data concerning the synthesis of polyi…
LiCaAlF/sub 6/:Cr/sup 3+/: a promising new solid-state laser material
LiCaAlF/sub 6/:Cr/sup 3+/ (Cr/sup 3+/:LiCAF) exhibits an intrinsic (extrapolated maximum) slope efficiency of 67%. For comparison, the intrinsic slope efficiencies of BeAl/sub 2/O/sub 4/:Cr/sup 3+/ (alexandrite), Na/sub 3/Ga/sub 2/Li/sub 3/F/sub 12/:Cr/sup 3+/ and ScBO/sub 3/:Cr/sup 3+/ were found to be 65, 28, and 26…
Minimal surfaces and structures: from inorganic and metal crystals to cell membranes and biopolymers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMinimal surfaces and structures: from inorganic and metal crystals to cell membranes and biopolymersSten Andersson, S. T. Hyde, Kare Larsson, and Sven LidinCite this: Chem. Rev. 1988, 88, 1, 221–242Publication Date (Print):January 1, 1988Publication History Published online1…
Carrier Scattering in Metals and Semiconductors
The transport properties of solids, as well as the many optical phenomena in them are determined by the scattering of current carriers. This book elucidates the state of the art in the research on the scattering mechanisms for current carriers in metals and semiconductors, and describes experiments in which these mech…
Two-dimensional thermal oxidation of silicon. II. Modeling stress effects in wet oxides
For pt.I see ibid., vol.ED-34, p.1008-17 (May 1987). The authors propose that the stress from two-dimensional oxide deformation affects the kinetic parameter in the Deal-Grove model (1965). In particular, the viscous stress associated with the nonuniform deformation of the oxide is identified as the fundamental force…
Gelation of aqueous gelatin solutions. I. Structural investigation
We have investigated the structural modifications of aqueous gelatin solutions for various thermal treatments and different concentrations. The structure is explored at different microscopic levels, putting into evidence the conformational coil ⇄ helix transition of the proteic chains (by optical rotation), the supram…
Dynamics of curved fronts
In recent years, much progress has been made in the understanding of interface dynamics of various systems: hydrodynamics, crystal growth, chemical reactions, and combustion. Dynamics of Curved Fronts is an important contribution to this field and will be an indispensable reference work for researchers and graduate st…
Photochemistry and radiation chemistry of colloidal semiconductors. 23. Electron storage on zinc oxide particles and size quantization
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry and radiation chemistry of colloidal semiconductors. 23. Electron storage on zinc oxide particles and size quantizationMarkus Haase, Horst Weller, and Arnim HengleinCite this: J. Phys. Chem. 1988, 92, 2, 482–487Publication Date (Print):January 1, 1988Publicati…
Wall Slip Corrections for Couette and Parallel Disk Viscometers
Often for slurries, gels, emulsions, and foams inhomogeneous fluid properties at solid boundaries create “apparent wall slip.” The reduced fluid viscosity at the boundary creates a thin layer of fluid having a large velocity gradient that can be treated as a “slipping layer”. In measurements of fluid viscosity it is n…