Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLight scattering and heterogeneities in low-loss poly(methyl methacrylate) glassesYasuhiro Koike, Norihisa Tanio, and Yasuji OhtsukaCite this: Macromolecules 1989, 22, 3, 1367–1373Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of cadmium selenide molecular clusters in zeolite Y: EXAFS and x-ray diffraction studiesKarin Moller, Mike M. Eddy, Galen D. Stucky, Norman Herron, and Thomas BeinCite this: J. Am. Chem. Soc. 1989, 111, 7, 2564–2571Publication Date (Print):March 1, 1989Publicat…
SUMMARY The reaction of copper and zinc were studied by adding the metal nitrate to a 4g:50ml suspension of calcite and water which had been equilibrated for two days, and then equilibrating for a further three days. Zinc behaved in a similar manner to cadmium in forming a surface‐solid solution of Zn χ Ca 1‐χ CO 3 as…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFive-coordinate complexes of 21-thiaporphyrin. Preparations, spectra, and structures of iron(II), nickel(II), and copper(II) complexesLechoslaw Latos-Grazynski, Jerzy Lisowski, Marilyn M. Olmstead, and Alan L. BalchCite this: Inorg. Chem. 1989, 28, 6, 1183–1188Publication Da…
Abstract The passivation of nickel has been studied in 1 M NaOH and 0.5 M H 2 SO 4 by XPS. An electrochemical specimen preparation and transfer to an ultra‐high vacuum, without contact with oxygen, permits a detailed examination of the oxide growth with potential and time resolution. Quantitative evaluation of the dat…
A computer model for predicting the distribution of steep-fronted surges in the line-end coils of machine windings is described. The model uses certain aspects of previous models combined to achieve simplification of solution while retaining accuracy. The solution technique is based on multiconductor transmission line…
The advent of laser Raman microprobe (LRM) instruments has permitted researchers to analyze minute (≥ 1 μm) phases in situ in their rock matrix. Geologists prefer to study such samples in polished thin-sections (in which a rock wafer is fixed with a mounting medium onto a glass slide and thinned to 30 μm thickness) or…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence studies of the conformational changes of poly(methacrylic acid) with pHA. F. Olea and J. K. ThomasCite this: Macromolecules 1989, 22, 3, 1165–1169Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and reactivity of a monomeric pentamethylcyclopentadienyliridium(III) imido complexDavid S. Glueck, Frederick J. Hollander, and Robert G. BergmanCite this: J. Am. Chem. Soc. 1989, 111, 7, 2719–2721Publication Date (Print):March 1, 1989Publication Histor…
The genus Sellaphora Mereschkowsky is resurrected to include those naviculoid diatoms with an H-shaped plastid containing an invaginated pyrenoid; a particular, characteristic series of conformational and positional changes in the plastid and nucleus during the cell cycle; gametangia that produce one gamete apiece and…
A model describing the dependence of the protonation level and the oxidation potential of polyaniline as a function of pH of equilibration and oxidation state has been derived. It is assumed that amine and imine sites do not function independently. Predictions are compared with previous experimental data.
The results of a study of the dielectric properties of a room-temperature ferroelectric liquid crystal in the frequency range from 5 Hz to 13 MHz are presented here. Measurements of complex electric permittivity versus temperature have been taken on aligned samples of different thicknesses with the electric measuring…
The paper presents the major steps of a mathematical procedure that permits the simulation of Electron Channeling Pattern @CP) maps of any mineral species for which unit-cell constants, the atomic species and their equivalent positions are known. The basis of calculation is the Bragg equation, the structure factor d a…
The optical properties of holographic kinoforms are described. It is shown that paraxial designs are not adequate for f/Nos. less than F/10. A nonparaxial design is introduced that retains the high diffraction efficiency of the paraxial designs, yet also produces an unaberrated diffracted wavefront for the design wave…
In order to investigate the factors affecting the interaction of polyurethanes and blood, a series of poly(tetramethylene oxide)-based polyurethane block copolymers was synthesized with systematically varying levels of ion incorporation in the hard segment block. A bimolecular nucleophilic substitution reaction was us…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface organometallic chemistry in the chemical vapor deposition of aluminum films using triisobutylaluminum: .beta.-hydride and .beta.-alkyl elimination reactions of surface alkyl intermediatesBrian E. Bent, Ralph G. Nuzzo, and Lawrence H. DuboisCite this: J. Am. Chem. Soc…
Cu x S thin films with a wide range of sheet resistances (r Square Operator ) and optical transmittance (T%), indicating different composition x, have been obtained from chemical baths constituted from copper(II) chloride, triethanolamine and thiourea at appropriate pH (10-12). Depending on the deposition parameters,…
P(VDF-TrFE) copolymers with approximately 30 mol% of TrFE content exhibit above room temperature a ferroelectric transition of first order type with a large thermal hysteresis. We present recent investigations of the ferroelectric phase and of the phase transition using several techniques: second harmonic generation o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe biosynthesis and characterization of poly(β-hydroxyalkanoates) produced by Pseudomonas oleovoransRichard A. Gross, Christopher DeMello, Robert W. Lenz, Helmut Brandl, and R. Clinton FullerCite this: Macromolecules 1989, 22, 3, 1106–1115Publication Date (Print):March 1, 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompatibilizing effect of block copolymers added to the polymer/polymer interfaceSpiros H. Anastasiadis, Irena Gancarz, and Jeffrey T. KobersteinCite this: Macromolecules 1989, 22, 3, 1449–1453Publication Date (Print):March 1, 1989Publication History Published online1 May 20…