Materials Literature
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The temperature dependence of the pyroelectric coefficient γd of (Na½Bi½)TiO3 ceramics has been measured. It was found that this crystal is a perspective material for using as a sensitive element of the pyroelectric radiation detectors steadily working in the temperature range of ∽ 20—60°C (γd = 2.5 ' 10-8C cm-2 °C-1;…
Abstract The creep behavior of ultrahigh‐modulus polyethylene monofilaments has been studied over the temperature range 20–70°C. A wide range of samples was examined in an attempt to determine the influence of draw ratio, molecular weight, copolymerization, and crosslinking by γ irradiation Prior to drawing. Results a…
Angle-resolved ultraviolet photoemission spectroscopy (ARUPS) has been used to study the p(2×1) oxygen-induced reconstruction of Cu(110). While there is agreement between experimental groups that the O atoms sit in the long-bridge site along the 〈001〉 Cu directions, there are two proposed models for the reconstruction…
Abstract Thin films of polystyrene (PS) are bonded to copper grids and crosslinked with electron irradiation. When the films are strained in tension regions of local plastic deformation, either crazed or plane stress deformation zones (DZs), nucleate and grow from dust particles. the nature of the local deformation, a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNovel triicosahedral structure of the largest metal alloy cluster: hexachlorododecakis(triphenylphosphine)-gold-silver cluster [(Ph3P)12Au13Ag12Cl6]m+Boon K. Teo and Kelly KeatingCite this: J. Am. Chem. Soc. 1984, 106, 7, 2224–2226Publication Date (Print):April 1, 1984Publicatio…
A new method has been developed to study non-equilibrium transport and energy relaxation phenomena in disordered organic and inorganic semiconductors. Given a distribution of localized states, the mean-square displacement and average energy of the excitation may be evaluated as functions of initial energy and time. Th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase transformations of liquid crystalline side-chain oligomersH. Stevens, G. Rehage, and H. FinkelmannCite this: Macromolecules 1984, 17, 4, 851–856Publication Date (Print):April 1, 1984Publication History Published online1 May 2002Published inissue 1 April 1984https://pub…
Alkali metals adsorbed on transition metal surfaces do not only change the electronic properties of these metals but alter also their chemical reactivity. This effect is well known in heterogeneous catalysis as the promotion of metallic catalysts by alkali additives. The more fundamental physics of this effect is bein…
Lower critical solution temperature (LCST) behavior in polymer blends is shown to be the result of the compressible nature of the system, the directional-specific character of the intermolecular interactions, or a combination of both. Certain random copolymer-homopolymer blends are examples of the first possibility. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox conduction in single and bilayer films of redox polymerP. G. Pickup, W. Kutner, C. R. Leidner, and Royce W. MurrayCite this: J. Am. Chem. Soc. 1984, 106, 7, 1991–1998Publication Date (Print):April 1, 1984Publication History Published online1 May 2002Published inissue 1…
A search has been made for regional differences in macromolecular synthesis in the axolotl embryo at a stage when the principal regions have become determined but terminal differentiation has not yet begun. The epidermis of the neurula makes a number of abundant proteins which are not made elsewhere. Some of these are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConcentration dependent relaxation times of linear polymers in dilute solutionsM. MuthukumarCite this: Macromolecules 1984, 17, 4, 971–973Publication Date (Print):April 1, 1984Publication History Published online1 May 2002Published inissue 1 April 1984https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOne- and two-electron reduction of aluminum and tin pyridylporphyrins. A kinetic spectrophotometric studyS. Baral, P. Hambright, and P. NetaCite this: J. Phys. Chem. 1984, 88, 8, 1595–1600Publication Date (Print):April 1, 1984Publication History Published online1 May 2002Pub…
Abstract Bulk mineralogy, clay fraction mineralogy and layer ratio in interstratified illite-smectite were studied in three Upper Miocene profiles, up to 200 m deep and representing very low sedimentation rates (∼80 mm/10 3 yr) with environments of sedimentation ranging from hypersaline (gypsum deposits) to brackish.…
Synthese hydrothermale a partir d'un melange stœchiometrique de Bi 2 O 3 et Bi 2 S 3 avec une solution NaOH a 10% comme solvant, a 673 K et 98 MPa. Cristallisation dans Pnnm avec a=3,874, b=11,916 et c=3,840 A, Z=2; affinement jusqu'a R=0,057. Antiprisme carre autour de Bi. Les liaisons Bi-O formant des tetraedres OBi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-sensitized photooxidation of protoporphyrin IX and related free-base porphyrins in natural and model membrane systems. Evidence for novel photooxidation pathways involving amino acidsMarianne Krieg and David G. WhittenCite this: J. Am. Chem. Soc. 1984, 106, 8, 2477–2479…
If the diffraction pattern from crystalline proteins is recorded with shorter wavelengths than is customary the radiation damage may be reduced and absorption corrections become less important.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the chain conformation in uniaxially stretched poly(dimethylsiloxane) networks by small-angle neutron scatteringMichel Beltzung, Claude Picot, and Jean HerzCite this: Macromolecules 1984, 17, 4, 663–669Publication Date (Print):April 1, 1984Publication Histor…
As the largest CuS cluster known to date, [Cu12S8]4⊖ occupies a special position. It is the first copper(I) complex containing exclusively sulfidic ligands that has been isolated. The Ph4P salt is formed on reaction of CuCl2·2H2O with EtS⊖ and Li2S in the presence of Ph4PBr.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the complexation of iron(II) with ferrozineJames C. Thompsen and Horacio A. MottolaCite this: Anal. Chem. 1984, 56, 4, 755–757Publication Date (Print):April 1, 1984Publication History Published online1 May 2002Published inissue 1 April 1984https://pubs.acs.org/do…