Materials Literature
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The electron beam of a scanning electron microscope (SEM) is used to charge an unmetallized insulator (Al2O3, Y2O3, SiO2) in vacuum. The charging is found to be stable in time after the e-beam is switched off. The SEM is also used to measure the implanted charge by measuring the resulting electrostatic potential. The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution aluminum-27 and silicon-29 MAS NMR investigation of silica-alumina glassesR. K. Sato, P. F. McMillan, P. Dennison, and R. DupreeCite this: J. Phys. Chem. 1991, 95, 11, 4483–4489Publication Date (Print):May 1, 1991Publication History Published online1 May 2002…
An ellipsoid shell consisting of 30 linked tetragonal VO5, pyramids surrounding a distorted {V4O4}O4 cube-this is one way to describe the title compound (right: solid circles, V; empty circles, O). This cluster is not only of topological interest, however. Its magnetic properties make it a molecular model of the monoc…
The nucleation and crystallization of the Na 2 O · 2CaO · 3SiO 2 (NC 2 S 3 ) glass were studied by differential thermal analysis (DTA), and a (nucleation rate—temperature)‐like curve was determined by plotting either the reciprocal of the temperature corresponding to the crystallization peak maximum, 1/ T p , or the h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of monolith catalysts for power plant nitrogen oxide (No.+-.) emission controlJean W. Beeckman and L. Louis HegedusCite this: Ind. Eng. Chem. Res. 1991, 30, 5, 969–978Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMacroscopic and microscopic thermodynamic observations in swollen poly(vinyl acetate) networksFerenc Horkay, Anne Marie Hecht, Simon Mallam, Erik Geissler, and Adrian R. RennieCite this: Macromolecules 1991, 24, 10, 2896–2902Publication Date (Print):May 1, 1991Publication Hi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectroscopic studies of polypyrrole synthesized with oxidative iron(III) saltsE. T. Kang, K. G. Neoh, Y. K. Ong, K. L. Tan, and B. T. G. TanCite this: Macromolecules 1991, 24, 10, 2822–2828Publication Date (Print):May 1, 1991Publication History Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew high-refractive-index organic/inorganic hybrid materials from sol-gel processingB. Wang, G. L. Wilkes, J. C. Hedrick, S. C. Liptak, and J. E. McGrathCite this: Macromolecules 1991, 24, 11, 3449–3450Publication Date (Print):May 1, 1991Publication History Published online1…
Tryptophan synthase, an alpha 2 beta 2 complex, is a classic example of an enzyme that is thought to "channel" a metabolic intermediate (indole) from the active site of the alpha subunit to the active site of the beta subunit. We now examine the kinetics of substrate channeling by tryptophan synthase directly by chemi…
Abstract An analysis of available methods of dealing with polymer crystallization for process modeling is presented. Problems encountered in using isothermal data to predict nonisothermal results are discussed and illustrated using experimental data for nylon 6. A half‐time analysis is used to evaluate and extrapolate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis[3-tert-butyl-5-(N-oxy-tert-butylamino)phenyl] nitroxide in a quartet ground state: a prototype for persistent high-spin poly[(oxyimino)-1,3-phenylenes]Takayuki Ishida and Hiizu IwamuraCite this: J. Am. Chem. Soc. 1991, 113, 11, 4238–4241Publication Date (Print):May 1, 19…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAtropisomer-specific formation of premicellar porphyrin J-aggregates in aqueous surfactant solutionsDavid C. Barber, Ruth A. Freitag-Beeston, and David G. WhittenCite this: J. Phys. Chem. 1991, 95, 10, 4074–4086Publication Date (Print):May 1, 1991Publication History Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHyperbranched poly(siloxysilanes)Lon J. Mathias and Terrell W. CarothersCite this: J. Am. Chem. Soc. 1991, 113, 10, 4043–4044Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/doi/10.1021/ja00010…
Equations that described the thermodynamic properties of the NaBr+H2O system were obtained from a fit to experimental results for this system. The experimental results included in the fit spanned the range of temperature of approximately 260 to 623 K and the range of pressure from the vapor pressure of the solution to…
The phosphor has been investigated for its application to vacuum fluorescent displays (VFDs) utilizing low‐voltage cathodoluminescence. It is expected that this oxide phosphor does not cause damage to filaments in VFD's, while it is a serious problem for conventional sulfide phosphors. This phosphor shows blue lumines…
We have constructed the metallicity distribution of a sample of 372 kinematically selected halo stars, most having spectroscopically determined abundances, drawn from our southern subdwarf study and the northern program of Laird et al. [AJ, 95, 1843 (l988a); 96, 1908 (l988b)]. We find that the metallicity distribution…
The dynamic response of the electrons at the surface of simple metals, like Na, K and Cs, to an external time varying field is discussed in this paper. Of special interest are the normal modes at a surface, defined theoretically by the poles in the reflection function. The surface plasmon is the best known normal mode…
peer reviewed
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal degradation of poly(methyl methacrylate). 4. Random side-group scissionLewis E. ManringCite this: Macromolecules 1991, 24, 11, 3304–3309Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1 May 1991https://pubs.acs.org/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface science studies of the electronic and chemical properties of bimetallic systemsJose A. Rodriguez and D. Wayne GoodmanCite this: J. Phys. Chem. 1991, 95, 11, 4196–4206Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Published inissue 1…