Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidative electropolymerization of iron and ruthenium complexes containing aniline-substituted 2,2'-bipyridine ligandsColin P. Horwitz and Qi ZuoCite this: Inorg. Chem. 1992, 31, 9, 1607–1613Publication Date (Print):April 1, 1992Publication History Published online1 May 2002…
Monte Carlo calculations have been performed in order to study the kinetics of carrier trapping in sparsely populated systems. The method of calculation overcomes the problem of a ‘very large number’ of carriers participating simultaneously in the relaxation process. The algorithm of the simulation is described. The c…
Abstract Chemical reaction fouling of heat exchangers involves deposition that is caused by chemical reactions which occur in the fluid, or on the surface itself. The factors which influence fouling of organic fluids via autoxidation and thermal decomposition processes are described and the dependence of the rate of t…
ABSTRACT Isolates of the centric diatom, Thalassiosira weissflogii Grun., were maintained in exponential growth under constant, favorable conditions for nearly 2 years. During this interval, each culture underwent periodic increases and decreases in mean cell size, a behavior predicted for diatom populations alternati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface free energy characteristics of polyfluorinated silane filmsElek Lindner and Ernest AriasCite this: Langmuir 1992, 8, 4, 1195–1198Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 April 1992https://pubs.acs.org/doi…
Abstract Fluropolymers, especially polytetrafluoroethylene (PTFE), have good fire‐resistance properties, but their application is limited by concerns over the toxicity of their thermal decomposition products. In experiments using a tube furnace system similar to the DIN 53 436 method, the 30‐minute (+ 14 days observat…
Cristallisation dans Pna2 1 avec a=8.447, b=7.3789, c=5.1408A, Z=4; affinement jusqu'a R=0.0188. D'apres la distribution des charges electroniques, l'orbitale 2p vacante de l'atome B(1) coordine triangulairement est essentiellement occupee par des electrons appartenant a des paires libres des atomes O(1) et O(2) lies…
A comprehensive thermal test program was conducted on a 2000 kVA cast-resin dry type transformer with 300 embedded thermocouples to determine the hottest spot temperature allowance and to obtain data to develop mathematical models. Nineteen thermal test runs were performed at different loads, tap positions, and core e…
The preference of some New Zealand soils to retain potassium over calcium under simulated field conditions has been measured by using Gaines and Thomas selectivity coefficients. All samples showed a preference for potassium over calcium (and magnesium), although the soils contained much more exchangeable calcium than…
The recently developed "Giant" magnetostrictive material, Terfenol-D, has been applied to development of a new class of adaptive actuators for vibration control. Terfenol-D offers the highest strain (ΔL/L > 10 -3 ) and energy density (1.4-2.5 x 10 4 J/m 3 ) of any commercially available material.
Abstract The ring‐opening polymerization of ϵ‐caprolactone was investigated in dependence on the most important reaction parameters. It was found that the monomer conversion is above all determined by polymerization temperature just as type and concentration of initiator. High yields of polymer can be obtained by init…
The optical band gap (${\mathit{E}}_{0}$) and thermal diffusivity (\ensuremath{\alpha}) of bulk ${\mathrm{Ge}}_{\mathit{x}}$${\mathrm{Sb}}_{5}$${\mathrm{Se}}_{95\mathrm{\ensuremath{-}}\mathit{x}}$ and ${\mathrm{Ge}}_{\mathit{x}}$${\mathrm{Sb}}_{10}$${\mathrm{Se}}_{90\mathrm{\ensuremath{-}}\mathit{x}}$ glasses have bee…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of cage-type sulfur-bridged cobalt(III)zinc(II) polynuclear complexes. Crystal structure of spontaneously resolved [{Co(aet)3}4Zn4O]Br6 (aet = 2-aminoethanethiolate)Takumi Konno, Takayuki Nagashio, Kenichi Okamoto, and Jinsai HidakaCite this: Inorg.…
We study a system of hard spherocylinders with rotational freedom in which the length-to-diameter ratio of the spherocylinder L/D is large. The asymptotic expressions for the one-particle distribution function and the free-energy functional in the limit L/D\ensuremath{\rightarrow}\ensuremath{\infty} are found. The vir…
The artificial photosynthesis of ammonia , that is, the fixation of N 2 and conversion to NH 3 , is a fascinating research goal about which there are repeated reports of success in the literature. This communication now shows amongst other results why the obvious methods, in particular the heterogeneous catalysis of t…
The morphological change of natural pores with densification was examined in an alumina green body. The liquid‐immersion technique was used for observing pores inside the body before and after sintering. In this technique the specimen is made transparent by an adequate immersion liquid and observed with a transmission…
Abstract The clay-polysaccharide interaction is of practical importance in the formation and stabilization of soil aggregates. This study examined the adsorption of three synthetic polysaccharides (PSS) and one soil PSS on Silver Hill illite. The adsorption of PSS was influenced by both the adsorbed cations on the ads…
We measured the Raman spectrum associated with the transverse optical (TO) phonon of cubic SiC (β-SiC) whiskers as a function of stress using a diamond anvil cell (for hydrostatic stress, X) and an individual whisker microtension apparatus (for uniaxial stress along [111], P). These experiments were used to calibrate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnionic polymerization of lactones. 14. Anionic block copolymerization of δ-valerolactone and L-lactide initiated with potassium methoxidePiotr Kurcok, Jan Penczek, Jan Franek, and Zbigniew JedlinskiCite this: Macromolecules 1992, 25, 9, 2285–2289Publication Date (Print):Apr…
A ruling engine for large and/or high-groove density gratings is developed. A hybrid driving method that uses a piezoelectric device and a screw-nut mechanism is adopted to achieve stop-and-go blank motion with a closed-loop control system. Several test gratings, including a ruled area of 300(width) x 200(groove lengt…