Materials Literature
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Collagenous peptides containing the Ehrlich chromogen (EC) were selectively isolated from a tryptic digest of bovine tendon by coupling to a diazotized polyacrylamide support. The isolated p-phenol-azo-EC peptides were purified and characterized by amino acid and sequence analyses. EC occurred in stoichiometric amount…
Model experiments have been conducted on a series of alumina samples in which the microstructures have been tailored to conform to the classical configuratins depicted in the models of final‐stage sintering. Simultaneous measurements of sintered density, grain size, pore number density, and pore size distribution were…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA simple, efficient route to a .mu.6-oxo-centered hexanuclear iron(III) alkoxide complex: preparation and structure of Na2Fe6O(OCH3)18.cntdot.6CH3OHKaspar Hegetschweiler, Helmut W. Schmalle, Hans M. Streit, Volker Gramlich, Hans Ulrich Hund, and Isidor ErniCite this: Inorg.…
The thermal conductivity of chemical-vapor-deposited diamond films on silicon is measured for the case of heat flow parallel to the plane of the film. A new technique uses thin-film heaters and thermometers on a portion of the film which is made to be free standing by etching away the substrate. Effects of thermal rad…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxo alkoxides of vanadium: the structures of the decanuclear vanadium(IV) clusters [V10O16{CH3CH2C(CH2O)3}4]4- and [V10O13{CH3CH2C(CH2O)3}5]-M. Ishaque Khan, Qin Chen, D. P. Goshorn, Hakon Hope, Sean Parkin, and Jon ZubietaCite this: J. Am. Chem. Soc. 1992, 114, 9, 3341–…
In this work, wedge-screw and twist-edge dispirations in liquid crystals were visually observed. In smectic phases, such as the antiferroelectric Sm${\mathit{C}}_{\mathit{A}}$ and the dimeric Sm${\mathit{C}}_{2}$, where the molecules or the mesogenic groups in the adjacent smectic layers tilt in opposite senses, we fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterfacial segment density profiles of end-anchored polymers in a meltRichard A. L. Jones, Laura J. Norton, Kenneth R. Shull, Edward J. Kramer, Gian P. Felcher, Alamgir Karim, and Lewis J. FettersCite this: Macromolecules 1992, 25, 9, 2359–2368Publication Date (Print):April…
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…