Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and defects in fully syndiotactic polypropyleneAndrew J. Lovinger, Bernard Lotz, Don D. Davis, and F. J. Padden Jr.Cite this: Macromolecules 1993, 26, 14, 3494–3503Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue…
Sub-micrometer-sized particles of poly(L-lactic acid) may be formed by using near-critical or supercritical carbon dioxide as an antisolvent to precipitate poly(L-lactic acid) from droplets of methylene chloride solution sprayed into a carbon dioxide continuous phase. Particle sizes may be controlled by varying the de…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDimensionality of manganese(II)-copper(II) bimetallic compounds and design of molecular-based magnetsHumberto O. Stumpf, Yu Pei, Olivier Kahn, Jorunn Sletten, and Jean Pierre RenardCite this: J. Am. Chem. Soc. 1993, 115, 15, 6738–6745Publication Date (Print):July 1, 1993Publ…
The production of OH radicals by dissociation of water vapor in oscillating argon bubbles is studied theoretically to examine a possible mechanism for the emission of the 310-nm line observed in sonoluminescence experiments. Accurate models are used for the calculation of the temperature field in the gas and for the d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of an octanuclear iron(III) cationC. Delfs, D. Gatteschi, L. Pardi, R. Sessoli, K. Wieghardt, and D. HankeCite this: Inorg. Chem. 1993, 32, 14, 3099–3103Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue 1…
Anhydrous glasses in the series x Li 2 O + (1 ‐ x )P 2 O 5 have been prepared and characterized in the range 0 ≤ x ≤ 0.5. FT‐IR spectroscopy and glass transition temperature measurements have been used to explore the structure and a key physical property of the low‐alkali phosphate glasses. The structure of v ‐P 2 O 5…
Diamonds grown by the temperature-gradient method using a nickel catalyst and sufficient nitrogen getter to produce barely detectable nitrogen absorption in the defect-induced one-phonon region have a deep brown colour which we show results from continuum absorption whose threshold lies around 1.7eV. In these diamonds…
The electrical conductivity of chemically synthesized and annealed polyaniline has been investigated. The room-temperature conductivity varies with the time and the temperature of annealing, and exhibits a maximum peak on its time-dependence curves for the polymer annealed above 120 °C. The time showing the maximum pe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and high-resolution optical spectroscopy of bis[2-(2-thienyl)pyridinato-C3,N'](2,2'-bipyridine)iridium(III)Mirco G. Colombo and Hans U. GuedelCite this: Inorg. Chem. 1993, 32, 14, 3081–3087Publication Date (Print):July 1, 1993Publication History Published online1 M…
The effects of electrode resistance and electrochemical polarization on potential measurements made with reference electrodes in various locations are demonstrated for electrodes with full‐width tabs and idealized polarization characteristics. Nonuniform current distribution, which changes during discharge, can lead t…
The hydrolytically unstable polyphosphazenes, poly [(imidazolyl) (methylphenoxy) phosphazenes] and poly [ethyl glycinato) (methylphenoxy) phosphazenes], were studied as potential polymeric supports for cells in tissue regeneration. For bone repair, their specific function would be to support osteoblast growth, forming…
To meet the future goals of reduced emissions produced by gas turbine combustors, a better understanding of the process of formation of various pollutants is required. Both empirical and analytical approaches are used to provide the exhaust concentrations of pollutants of interest such as NOx, CO, and unburned hydroca…
The adsorption of CO on Pd(111) and Pd(100) have been studied using infrared reflection–absorption spectroscopy over a wide range of CO pressures and temperatures. A strong dependence of CO adsorption on the initial conditions was found for Pd(111) while CO adsorption on Pd(100) was essentially independent of the cond…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDonor-acceptor diphenylacetylenes: geometric structure, electronic structure, and second-order nonlinear optical propertiesC. Dehu, F. Meyers, and J. L. BredasCite this: J. Am. Chem. Soc. 1993, 115, 14, 6198–6206Publication Date (Print):July 1, 1993Publication History Publis…
The super duplex stainless steel SAF 2507, with a typical composition of ~25%Cr, 3·8%Mo, ~7%Ni, and 0·27%N, has been isothermally heat treated in the temperature range 700–1030°C for times between 1 min and 72 h. The influence of heat treatment on impact toughness and pitting corrosion resistance has been investigated…
ABSTRACT Edible films were cast from solutions of sodium or calcium caseinate and from emulsions of these proteins with acetylated monoglyceride, beeswax, and stearic acid. The water vapor permeabilities of the films were evaluated at 25°C using the ASTM E96–80 method, modified to calculate the % relative humidity at…
Abstract The direct oxidation of CH 4 to H 2 and CO in O 2 and in air at high temperatures over alumina foam monoliths coated with high loadings of Pt and Rh has been simulated using a 19‐elementary‐step model of adsorption, desorption and surface reaction steps with reaction parameters from the literature or from fit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModel identification and control of solution crystallization processes: a reviewJames B. Rawlings, Stephen M. Miller, and Walter R. WitkowskiCite this: Ind. Eng. Chem. Res. 1993, 32, 7, 1275–1296Publication Date (Print):July 1, 1993Publication History Published online1 May 2…
Ballistic and diffusive phonon transport under small time and spatial scales are important in fast-switching electronic devices and pulsed-laser processing of materials. The Fourier law represents only diffusive transport and yields an infinite speed for heat waves. Although the hyperbolic heat equation involves a fin…
It is demonstrated that hysteresis in the magnetostriction k is coupled to hysteresis in the magnetization M because of the dependence of the magnetostriction on the magnetization. At the same time, when stress is present, the magnetization is in turn coupled to the behavior of the part of the magnetostriction associa…