Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTotal synthesis of (.+-.)-poitediol and (.+-.)4-epipoitediolRobert C. Gadwood, Renee M. Lett, and Jane E. WissingerCite this: J. Am. Chem. Soc. 1984, 106, 13, 3869–3870Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June…
An electromotive force series for redox couples was defined as a function of oxygen fugacity in a borosilicate melt at 1150°C. The resulting order of relative reduction potentials can be used to estimate the amounts of redox species in glass during processing. The electromotive force series in this melt is comparable…
The origins of the electronic levels of rare earths in the condensed phase and the influence of the glassy matrix on the position of the energy levels and factors responsible for radiative and nonradiative transitions are discussed. Examples are given of rare earth intensity parameters and nonradiative transitions in…
This paper discusses the fundamental aspects of theories describing the electromagnetic surface modes in microcorystals and their optical response. The relationships between the theories are emphasized, and three characteristics of the surface modes are summarized. Observed infrared spectra of MgO microcrystals and Ra…
Diagnostic quality of radiographs and adverse reactions associated with the use of metrizamide and iohexol as contrast agents in lumbar myelography were compared in a prospective randomized double blind study in 350 patients at seven centers. The contrast media were administered in comparable volumes at a concentratio…
Abstract A procedure has been developed for preparing tri‐ O ‐benzylcellulose with higher yields than 90%. In this procedure, cellulose was dissolved in a nonaqueous cellulose solvent, SO 2 –diethylamine (DEA)–dimethyl sulfoxide (DMSO), and then powdered sodium hydroxide was added. To the suspension thus prepared, ben…
Results using a rotating disk electrode (RDE) clarify the mechanism of corrosion of commercial Cu‐9.4Ni‐1.7Fe alloy in aerated 3.4 weight percent NaCl solution at room temperature. The loosely adherent corrosion product (mainly Cu 2 ( OH ) 3 Cl ) formed under rotating conditions consists of two layers. Additional supp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular interactions in photochromic spiropyran-merocyanine polymersEfim Goldburt, Felix Shvartsman, Svetlana Fishman, and Valeri KrongauzCite this: Macromolecules 1984, 17, 6, 1225–1230Publication Date (Print):June 1, 1984Publication History Published online1 May 200…
Die ersten N,N′ ‐Dicyanchinondiimine 3 konnten durch Reaktion von Chinonen 1 mit 2 in Gegenwart von TiCl 4 synthetisiert werden. Mit Anwendungen von 3 befaßt sich der nachstehende Beitrag. magnified image
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe discontinuous high-spin (5T2) .dblharw. low-spin (1A1) transition in solid bis(1,10-phenanthroline-2-carbaldehyde phenylhydrazone)iron(II) bis(tetrafluoroborate): hysteresis effects, concurrent crystallographic phase change, entropy of the transition, and effect of press…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced Raman spectra of an active flavoenzyme: glucose oxidase and riboflavin binding protein on silver particlesRobert A. Copeland, Stephen P. A. Fodor, and Thomas G. SpiroCite this: J. Am. Chem. Soc. 1984, 106, 13, 3872–3874Publication Date (Print):June 1, 1984Pu…
Abstract Middle Jurassic sandstones contain a variety of authigenic clay materials. The origin and distribution of these are related to the influence of several factors, principally depositional pore-fluid chemistry, sandbody geometry and the migration of aggressive fluids. Pore-lining illite, pore-lining chlorite and…
The effects of sulfide contamination (5 ppm) on the corrosion mechanism of Cu‐9.4Ni‐1.7Fe alloy were studied in 3.4 weight percent ( w / o ) NaCl solution at room temperature. Compared to the sulfide‐free solutions ( i ), the thickness of the corrosion products formed in the sulfide solution is much greater, and ( ii…
Abstract This article describes the synthesis of N , N ′‐bis(3,3′‐maleimidophenyl) sulfone (S) and its Michael addition products with (4,4′‐diaminodiphenyl) methane (S‐M), 4,4′‐diaminodiphenyl ether (S‐E), (3,3′‐diaminodiphenyl) sulfone (S‐DDS m ), (4,4′‐diaminodiphenyl) sulfone (S‐DDS p ), (3,3′,3″‐tris aminophenyl)…
We introduce a new experimental technique for directly measuring the energy and momentum scattering rates of hot electrons in dielectrics. Their energy distribution and impact ionization rate at a given electrical field F is a function of \begin{equation*}F^{2} \int^{E}_{0} \gamma_{p}(E)\gamma^{L0}_\mu{ }(E)dE\end{equ…
Il est montre que des techniques de calcul basees sur la minimisation de l'energie cristalline par rapport aux coordonnees atomiques predisent correctement les structures cristallines complexes. Illustration par application a un certain nombre de composes Ti-O et V-O. Deux types de composes sont consideres dans cette…
Abstract An interlaboratory test of the NPL calibration values and methodology for the energy scale of XPS instruments, given in Part 1, has been completed. The NPL calibration values are given for the Cu 3p, Au 4f 7/2 , Ag 3d 5/2 , Cu LMM, Cu 2p 3/2 , and Ag MNN peaks for A1 and Mg Kα radiations to an accuracy of 20…
The first N,N′-dicyanoquinonediimines 3 could be synthesized by reaction of quinones 1 with 2 in the presence of TiCl4. Applications of 3 are discussed in the following article.
Abstract Functionalization of an amorphous ethylene‐propylene copolymer, EPM, has been performed by means of homogeneous grafting reactions of unsaturated molecules such as dibutylmaleate, diethylfumarate, itaconic anhydride, and maleic anhydride, initiated by free radicals. Dicumylperoxide and dibenzoylperoxide have…
The effect of molybdate ion on the corrosion of mild steel in an aggressive, low hardness water was investigated electrochemically. Studies were conducted with molybdate concentration ranging from 50 to 5000 mg/L in waters of pH 3, 5, 7, and 9. The effect of temperature and aeration was also investigated. In deaerated…