Materials Literature
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The draping behaviour of fabric treated as an orthotropic shell membrane is predicted by using a geometric non-linear finite-element method, and the results are compared with actual behaviour. A drape tester employing photovoltaic cells was designed and constructed to determine the drape coefficient of fabric specimen…
The breakpoint frequency method, which allows determination of the electrochemically active area of a coated metal in seawater, is described. A computer model is used to explain the basis of the breakpoint method, and the model is compared to impedance and visual data from epoxy‐coated steel panels in ASTM artificial…
A crack‐ and pinhole‐free composite membrane consisting of an α‐alumina support and a modified γ‐alumina top layer which is thermally stable up to 1100°C was prepared by the sol–gel method. The supported thermally stable top layer was made by dipcoating the support with a boehmite sol doped with lanthanum nitrate. The…
D. Curran, J. Grimshaw and S. D. Perera, Chem. Soc. Rev., 1991, 20, 391 DOI: 10.1039/CS9912000391
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of highly dispersed cobalt oxide and sulfide catalysts supported on silicaYasuaki Okamoto, Kozo Nagata, Toshinori Adachi, Toshinobu Imanaka, Kazuhiro Inamura, and Toshiyuki TakyuCite this: J. Phys. Chem. 1991, 95, 1, 310–319Publication Date (…
This work introduces a tutorial series on material failure mechanisms and damage models to familiarize nonspecialists with the fundamentals of failure mechanisms in engineering assemblies. Since failure is a complicated concept, four simple conceptual models for failure are discussed: stress-strength, damage-endurance…
Since the discovery of long-lived oligomeric silver clusters in aqueous polyanion solutions it has become possible to investigate the chemical reactivity of silver aggregates over a wide size range, especially in the range where the transition from the atom to the metal takes place.Both oligomeric and metallic particl…
STRUCTURE AND COMPOSITION OF ELECTRODES AND ELECTROLYTES: Techniques for the Study of Solid Ionic Conductors Ellipsometry as an In Situ Probe for Study of Electrode Processes In Situ Characterization of Electrode Processes by Photothermal Deflection Spectroscopy Surface X-Ray Absorption Spectroscopy, EXAFS and NEXAFS…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and ultrastructural studies of styrene-divinylbenzene Polyhipe polymersP. Hainey, I. M. Huxham, B. Rowatt, D. C. Sherrington, and L. TetleyCite this: Macromolecules 1991, 24, 1, 117–121Publication Date (Print):January 1, 1991Publication History Published online1 Ma…
The structure of the cobalt present in carbon-supported Co and Co-Mo sulfide catalysts was studied by means of X-ray\nabsorption spectroscopy at the Co K-edge and by X-ray photoelectron spectroscopy (XPS). Thiophene hydrodesulfurization\nactivities were used to measure the catalytic properties of these catalysts. By c…
Manganese(II)-N,N'-dipyridoxylethylenediamine-N,N'-diacetate-5,5'-bis (phosphate) (MnDPDP) is a paramagnetic complex designed for use as a hepatobiliary agent. The T1 relaxivity of MnDPDP (2.8 [mmol/L]-1.sec-1 in aqueous solution) was similar to that of gadolinium diethylenetriaminepentaacetic acid (DTPA) (4.5 [mmol/L…
Near the sol-gel transition, gelling systems exhibit an extremely slow relaxation of thermally driven density fluctuations. We have made a detailed quasielastic light scattering study of the decay of density fluctuations in reacting silica sol-gels in the pre- and post-gel regimes, and at the gel point. In the pre-gel…
Abstract The harmonic balance method is a technique for the numerical solution of nonlinear analog circuits operating in a periodic, or quasi‐periodic, steady‐state regime. The method can be used to efficiently derive the continuous‐wave response of numerous nonlinear microwave components including amplifiers, mixers,…
An approach to molecular wires based on quasi-one-dimensional linearly conjugated poly-porphyrin systems is outlined and a rationally designed synthesis of the tetrakisporphyrin 9, a strand some 65 Å in length, via the bis(porphyrin)tetraone 2 is described.
The author presents a bibliography and survey of the literature concerned with theory and measurement of the stochastic behavior of pulsating partial-discharge (PD) phenomena that can occur when insulation is subjected to electrical stress. The types of PD phenomena considered include AC and DC generated electron aval…
Erbium-doped fiber has become the central component of nearly all optical amplifiers. Applications reported include repeaters, power amplifiers, preamplifiers, and distributed amplifiers. To date, nearly all the fiber used in these devices has been silica based and fabricated by variations on the major telecommunicati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced electron transfer in the solid state: rate vs. free energy dependence in fixed-distance porphyrin-acceptor moleculesGeorge L. Gaines III, Michael P. O'Neil, Walter A. Svec, Mark P. Niemczyk, and Michael R. WasielewskiCite this: J. Am. Chem. Soc. 1991, 113, 2, 71…
The journal consistently attracts the most important and highly innovative papers from the current research; our commitment to rapid publication ensures that these are published in the fastest time possible. In addition to primary papers from world-renowned experts, the Journal contains authoritative reviews that summ…
Thermodynamics and phase diagrams of materials, A.D.Pelton diffusion in crystalline solids, G.E.Murch statistical theories of phase transitions, K.Binder homogeneous second phase precipitation, R.Wagner transformations involving interfacial diffusion, G.R.Purdy diffusionless transformations, L.Delaey spinodal decompos…
Polyhydroxyalkanoic acids (PHA) are water-insoluble polyesters of alkanoic acids containing a hydroxyl group as at least one functional group in addition to the carboxy group, and possess the general formula shown in Fig. 1. Although some of these polymers are also available from chemical synthesis, many of them are s…