Materials Literature
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Surfaces of implantable and blood contact-devices accumulate adsorbed and denatured proteins. This anomalous layer of proteins may help trigger unwanted events such as activation of coagulation systems and, perhaps, chronic inflammation. Because, in many experimental systems, the purposeful coating of surfaces with al…
Terphenyls with two lateral ortho-fluoro-substituents have proved to be excellent host materials for ferroelectric (SC∗) mixtures. The compounds reported here are biphenyls with the same arrangement of lateral substituents but with a trans-4-alkylcyclohexylethyl moiety as one of the terminal substituents. Such three r…
A method to determine the thermal diffusivity in thin films, based on the measurement and analysis of thermal waves induced by a modulated infrared laser, is demonstrated. A nearly exact mathematical description, independent of the film geometry and including surface heat losses, is presented. It is shown that the in-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA quantitative scale for the oxidizing strength of oxidative fluorinatorsKarl O. Christe and David A. DixonCite this: J. Am. Chem. Soc. 1992, 114, 8, 2978–2985Publication Date (Print):April 1, 1992Publication History Published online1 May 2002Published inissue 1 April 1992ht…
In this work recycled polyolefins from municipal solid wastes, composed of 95% polyethylene (PE) and 5% polypropylene (PP), are reinforced with chemico thermomechanical pulp fiber, and the resulting material is formed by compression and in jection molding. Tensile properties are presented as function of fiber concentr…
A common feature of stable quasicrystals, high-${\mathit{T}}_{\mathit{C}}$ ferroelectrics, and high-${\mathit{T}}_{\mathit{c}}$ superconductors is that their unusual physical properties are correlated with characteristic crystal stuctures that are often vicinal to structural instabilities. We describe a statistically…
Subcritical crack growth of macroscopic cracks in two Al 2 O 3 ceramics is investigated with single‐edge‐notched bending specimens under constant load. The resulting v ‐ K I ‐curves are in complete contrast to the behavior of natural cracks. In spite of the monotonic increase of the externally applied stress intensity…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular origin of supramolecular self-assembling in statistical copolymersChristopher Hilger, Martin Draeger, and Reimund StadlerCite this: Macromolecules 1992, 25, 9, 2498–2501Publication Date (Print):April 27, 1992Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of the galloaluminate GaO4Al12(OH)24(H2O)127+ polyoxocation by MAS NMR and infrared spectroscopies and powder x-ray diffractionSusan M. Bradley, Ronald A. Kydd, and Colin A. FyfeCite this: Inorg. Chem. 1992, 31, 7, 1181–1185Publication Date (Print):April 1,…
Electrochemically prepared poly(3‐methylthiophene) films on both platinum and 430 stainless steel (430SS) rotating disk electrodes (RDEs) were characterized for various galvanostatic electropolymerization conditions. Both applied current density and rotation rate affected subsequent redox capacity, polarization and se…
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…