Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn asymmetric synthesis of MK-0417. Observations on oxazaborolidine-catalyzed reductionsTodd K. Jones, Julie J. Mohan, Lyndon C. Xavier, Thomas J. Blacklock, David J. Mathre, Paul Sohar, E. Tracy Turner Jones, Robert A. Reamer, F. E. Roberts, and E. J. J. GrabowskiCite this:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvated metal atom dispersed catalystsKenneth J. Klabunde, Yong Xi Li, and Beng Jit TanCite this: Chem. Mater. 1991, 3, 1, 30–39Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 January 1991https://pubs.acs.org/doi/10.…
ABSTRACTPublished methods for production of homogeneous edible films from com and wheat proteins were adapted. Barrier and mechanical properties of the edible films were evaluated with procedures commonly used on polymeric films. Mechanical property data included thickness, elongation, tensile strength, tear strength,…
Thermal stabilities of E′, Al, and Ti centers in quartz from the Mannari granite were investigated by electron spin resonance (ESR) with isothermal and isochronal annealing experiments. Second order decay kinetics best explain the results. The closure temperatures at which the ESR clocks start were estimated to be 91°…
Ferroelectric films, PbZr x Ti 1− x O 3 ( x = 0 to 0.6), have been prepared from corresponding metal alkoxides partially stabilized with acetylacetone through the sol‐gel process. The films dip‐coated in an ambient atmosphere were heat‐treated at 400°C for decomposition of residual organics and then at temperatures be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of structure and morphology of syndiotactic polypropylene and epitaxial relationships with isotactic polypropyleneAndrew J. Lovinger, Don D. Davis, and Bernard LotzCite this: Macromolecules 1991, 24, 2, 552–560Publication Date (Print):January 1, 1991Pu…
Abstract The fluorescence properties of surface modified quantum‐sized CdS colloids were investigated by means of static and time‐resolved low temperature fluorescence spectroscopy. All samples investigated had high fluorescence quantum yields already at room temperature and exhibited either exclusively excitonic or a…
The art of forming materials into technologically useful artifacts by manipulation of the dislocation substructure dates back at least 8000 years to the Sumerian coppersmiths.1 Physical understanding of the mechanisms involved, on the other hand, began little more than 50 years ago; modem knowledge suggests that even…
The principle of operation and the design of a scanning Kelvin microprobe for the determination of corrosion potential profiles are described. The profiles of Volta potentials on galvanically coupled metals under humidity films were determined and are compared to profiles for the same metals under dry nitrogen. The re…
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…