Materials Literature
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Electrochemistry of some β‐Substituted Polythiophenes: Anodic Oxidation, Electrochromism, and Electrochemical Deactivation, Tsai, Eric W., Basak, Sanjay, Ruiz, Jose P., Reynolds, John R., Rajeshwar, Krishnan
The anisotropic displacements of selected rigid groups in bovine ribonuclease A have been refined from X-ray diffraction data by the application of the rigid-body TLS model. The rigid groups chosen were the side chains of tyrosine, histidine and phenylalanine and the planar side chains of aspartic acid, glutamic acid,…
The bifunctional rat liver enzyme 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (ATP:D-fructose-6-phosphate 2-phosphotransferase/D-fructose-2,6-bisphosphate 2-phosphohydrolase, EC 2.7.1.105/EC 3.1.3.46) is constructed of two independent catalytic domains. We present evidence that the kinase and bisphosphatase h…
A convenient synthesis of a number of oligomeric thiophcnes and oligomeric methyl-, and ethyl-substituted thiophenes as building blocks for novel conducting polymers is reported. The synthesis is based on a NiCl2(dppp) (dppp = Ph2PCH2CH2CH2;PPh2) catalyzed coupling reaction between appropriately substituted bromothiop…
Although many proteins are known to be regulated via reversible phosphorylation, little is known about the mechanism by which the covalent modification of seryl, threonyl, or tyrosyl residues alters the activities of the target systems. To address this question, modified versions of Bacillus subtilus HPr, a protein co…
The structure of chemisorbed CO on the steps of Pt(112) {Pt[3(111)×(001)]} was monitored as a function of coverage by the digital electron stimulated desorption-ion angular distribution method (ESDIAD), digital low-energy electron diffraction (LEED), and temperature-programmed desorption (TPD). The ESDIAD method appli…
C 3 H 7 NO cristallise dans Pnam avec affinement a 110 K jusqu'a 0,034. Existence de liaisons hydrogene qui ont un effet significatif sur la conformation de la molecule
Rod-shaped scattering, referred to as crystal truncation rod (CTR) scattering in X-ray diffraction, can also be observed in optical diffraction patterns obtained from the surface profile image of high-resolution electron micrographs. The characteristics of the CTR scattering are shown to be in agreement with those obs…
A drastic drop of the electrical resistivity was observed on a ferroelectric insulator BaTiO 3 surface, after KrFlaser irradiation in air at atmospheric pressure. The temperature dependence of the resistivity was employed to demonstrate semiconducting behavior. Such behavior was seen when the resistance was measured i…
The behavior of melts in severe accident sequences affects the nature (composition and fission product inventory) of the debris released from the vessel upon lower head failure in unmitigated accidents and the coolability of debris at various stages in managed accidents. Core melting progressed further in the Three Mi…
Article Zur chemischen und thermischen Stabilität von Fluortensiden / The Chemical and Thermic Stability of Fluorosurfactants was published on December 1, 1989 in the journal Tenside Surfactants Detergents (volume 26, issue 6).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUV resonance Raman enhancement of vinyl stretching in ferric protoporphyrin IX: conjugation and preservation of the vinyl .pi. .fwdarw. .pi.* transitionValentino L. DeVito and Sanford A. AsherCite this: J. Am. Chem. Soc. 1989, 111, 26, 9143–9152Publication Date (Print):Decem…
<div class="htmlview paragraph">A Task Force on Corrosion has been established by the Automotive Applications Committee of the American Iron and Steel Institute. The Task Force is composed of technical representatives from the North American sheet steel producers and experts from the major automakers and pretrea…
This study is the first to make a direct comparison between the distorting mirror and the distorting videocamera with the same group of nonclinical subjects. It also establishes the internal consistency, the test-retest reliability and the convergent validity of both techniques. Analysis indicates, as with other studi…
The water absorption behavior of tungsten oxide films has been studied by infrared attenuated total reflection (ATR) spectroscopy. Our results indicate that most of the water in the film is present in the initial stage of deposition and hardly any water is added at greater thicknesses. It is also seen that the water c…
The thermal diffusivity D of three metallic glasses Fe80B20, Fe40Ni40P14B6, and Fe32Ni36Cr14P12B6 has been measured from 160 to 500 K by the laser-flash radiometry method and the thermal conductivity K has been calculated from these data. The accuracy of D and K is 6% and 8%, respectively. The electronic contribution…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT5,10,15,20-Tetrakis(.alpha.,.alpha.,.alpha.,.alpha.-o-(N-tert-butyl-carbamoyl)phenyl)porphyrin: synthesis and redox properties of zinc(II) and copper(II) complexesLeonin Leondiadis and Michel MomenteauCite this: J. Org. Chem. 1989, 54, 26, 6135–6138Publication Date (Print):D…
Inelastic neutron scattering studies have been performed on ferroelectric ${\mathrm{KNbO}}_{3}$ in its orthorhombic phase at room temperature. Dispersion curves up to 10 THz have been determined for phonons propagating along the [101], [010], and [111] pseudocubic directions. A detailed intensity map of the inelastic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConcerning the miscibility of PVC-PVAc blendsDorab E. Bhagwagar, Carl J. Serman, Paul C. Painter, and Michael M. ColemanCite this: Macromolecules 1989, 22, 12, 4654–4656Publication Date (Print):December 1, 1989Publication History Published online1 May 2002Published inissue 1…
Abstract Die Synthese von 2‐(9‐Anthryl)‐1,8a‐dihydro‐1,1‐azulendicarbonitril ( 1a ) über das Tetrahydroazulen 5a , ausgehend von 8‐Methoxyheptafulven ( 3 ) durch [8 + 2]‐Cycloaddition, wird beschrieben. Durch Bestrahlung mit sichtbarem Licht wird 1a in das Vinylheptafulven 2a umgelagert. Dieses wiederum kann unter the…