Materials Literature
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Are thiophene rings and chains more easily deformed than those in polyphenylene, polyfuran and polypyrrole? The conformation has great influence on the conjugation lenght of the polymers and therefore on their optical and electronic properites. Data obtained from an extremely rare X‐ray structure determination of an α…
Immunomagnetic beads (IMB) were used to recover thermophilic sulfate-reducing bacteria from oil field waters from oil production platforms in the Norwegian sector of the North Sea. IMB coated with polyclonal antibodies against whole-cell antigens of the thermophilic Thermodesulfobacterium mobile captured strains GFA1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonlinear optical properties of polyanilines and derivativesJohn A. Osaheni, Samson A. Jenekhe, Herman Vanherzeele, Jeffrey S. Meth, Yan Sun, and Alan G. MacDiarmidCite this: J. Phys. Chem. 1992, 96, 7, 2830–2836Publication Date (Print):April 1, 1992Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure and nonlinear optical properties of push-pull polyenes: theoretical investigation of benzodithia polyenals and dithiolene polyenalsF. Meyers, J. L. Bredas, and J. ZyssCite this: J. Am. Chem. Soc. 1992, 114, 8, 2914–2921Publication Date (Print):April 1, 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrically conductive polyaniline-copolymer latex compositesP. Beadle, S. P. Armes, S. Gottesfeld, C. Mombourquette, R. Houlton, W. D. Andrews, and S. F. AgnewCite this: Macromolecules 1992, 25, 9, 2526–2530Publication Date (Print):April 27, 1992Publication History Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility of aluminosilicates in alkaline solutions and a thermodynamic equilibrium modelHubert A. Gasteiger, William J. Frederick, and Robert C. StreiselCite this: Ind. Eng. Chem. Res. 1992, 31, 4, 1183–1190Publication Date (Print):April 1, 1992Publication History Publishe…
Citrate synthase (CS), which has been denatured in either guanidine hydrochloride (GdnHCl) or urea can be assisted in its renaturation in a variety of ways. The addition of each of the assistants--bovine serum albumin (BSA), oxaloacetate (OAA), and glycerol--promotes renaturation. In combination, the effect of these s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThionine in the cage of zeolite LGion Calzaferri and Niklaus GfellerCite this: J. Phys. Chem. 1992, 96, 8, 3428–3435Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 April 1992https://pubs.acs.org/doi/10.1021/j100187a047h…
ABSTRACT Most biominerals appear to be composites of organic material and mineral. Whether biosilica is such a composite is unresolved because of a lack of evidence for such organic components. We present evidence that organic material exists within diatom biosilica and can be extracted using HF/NH 4 F solutions from…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalysis by heteropoly compounds. 20. An NMR study of ethanol dehydration in the pseudoliquid phase of 12-tungstophosphoric acidKwan Young Lee, Takeo Arai, Shinichi Nakata, Sachio Asaoka, Toshio Okuhara, and Makoto MisonoCite this: J. Am. Chem. Soc. 1992, 114, 8, 2836–2842P…
This article presents a survey of the literature on X-ray diffraction by mesomorphic comb-like polymers. Special emphasis is placed upon two points: it is often possible to study the localization of the backbone in the smectic phases by considering the intensities of the Bragg reflections from the layers. It is also p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrigin of orientation phenomena observed in layered Langmuir-Blodgett structures of hairy-rod polymersStefan Schwiegk, Thomas Vahlenkamp, Yuanze Xu, and Gerhard WegnerCite this: Macromolecules 1992, 25, 9, 2513–2525Publication Date (Print):April 27, 1992Publication History P…
The phenomenon of pressure-induced crystalline →amorphous phase transformation in ice Ih has been studied with constant-pressure molecular dynamics calculations. It was found that although the temperature dependency of the transformation pressure resembles that of the extrapolated melting curve, the actual mechanism i…
Ferroelectric thin films are playing a growing role as key elements in variety of devices. For various techniques of ferroelectric thin film preparation, the sol-gel processing is one of the most promising. In comparison with different deposition techniques, we survey the intrinsic advantages and the recent improvemen…
Electron hopping in redox polymer-modified electrodes requires coincident ion movement to maintain electroneutrality, and transport effects can arise due to either process. In this paper, the equation for diffusion/migration by electron hopping is used with the classical Nernst-Planck equation for mobile ionic species…
It is well known that charge carrier mobilities μ in molecularly doped polymers, determined by transient photoconductivity experiments, depend on the temperature T, the mean distance p between dopant molecules and the electric field E. Recently introduced deconvolution procedures have made possible the systematic anal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-spin chemical bonding of metal monocarbonothioyl and -carbonyl [MCS and MCO] (M = Sc, Ti, V, Cr, Cu)G. H. JeungCite this: J. Am. Chem. Soc. 1992, 114, 9, 3211–3213Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 Apr…
An experimental study of formative times and the Topler's constant approach to modeling the breakdown event is presented. The authors deal with the dependence of formative time and Topler's constant on the macroscopic parameters of the insulation. Results obtained were statistically treated and the Topler's constant d…
We observed a spontaneous transition from a vertical chevron texture to a striped texture (striped ``bookshelf'' texture) in a surface-stabilized film of ferroelectric liquid crystal mixture (ZLI 4237-000, from E. Merck). The transition takes place gradually, at temperatures more than 20 \ifmmode^\circ\else\textdegree…
The copper(I) complexes [Cu(4-Xdmpz)] 3 (where X = H, Cl, Br, I and CH 3 ; dmpz = 3,5-dimethylpyrazolate) and the copper(II) complexes [Cu(4-Xdmpz) 2 ] x have been synthesized and characterized. Qualitative solubility, infrared spectroscopic, and differential scanning calorimetric studies are reported for all complexe…