Analysis of heteromorph ammonoids by differential geometry
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Internal Geometry and Evolution of Moulins, Storglaciären, Sweden
Abstract The initial conditions needed for formation of moulins are crevasses and a supply of melt water. Water pouring into a crevasse may fill it until it overflows at the lowest point, which is normally near the margin. However, as the crevasse deepens, it intersects englacial channels through which the water can d…
Acid‐Subsoil Amelioration: II. Gypsum Effects on Growth and Subsoil Chemical Properties
Abstract In many highly weathered soils crop exploitation of subsoil moisture reserves is severely curtailed by toxic levels of Al. Since vertical movement of lime is usually extremely slow in such soils, specialized mechanical and/or chemical procedures are required to overcome the problem. A field experiment with ma…
Polymerization of monomers containing functional silyl groups. 5. Synthesis of new porous membranes with functional groups
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of monomers containing functional silyl groups. 5. Synthesis of new porous membranes with functional groupsJae Suk Lee, Akira Hirao, and Seiichi NakahamaCite this: Macromolecules 1988, 21, 1, 274–276Publication Date (Print):January 1, 1988Publication History P…
Recent advances in aerospace refractory metal alloys
The development of refractory metal alloys for aerospace applications is reviewed. Refractory metals are prime candidates for many high temperature aerospace components because of their high melting points and inherent creep resistance. The use of refractory metals is often limited, however, by poor room temperature p…
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.
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…