Materials Literature
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Abstract A new approach for developing fundamental equations of oxygen permeation through thin mixed‐conducting oxide ceramic is presented considering both surface reactions on membrane‐gas interfaces and the diffusion of charged species in the bulk oxide. The essence of this work is the coupling of surface reactions…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrigin of Polychromism of Cis Square-Planar Platinum(II) Complexes: Comparison of Two Forms of [Pt(2,2'-bpy)(Cl2]R. H. Herber, M. Croft, M. J. Coyer, B. Bilash, and A. SahinerCite this: Inorg. Chem. 1994, 33, 11, 2422–2426Publication Date (Print):May 1, 1994Publication Histo…
The dielectric properties of 〈100〉-oriented epitaxial ${\mathrm{SrTiO}}_{3}$ films as used in high-${\mathit{T}}_{\mathit{c}}$ heterostructures have been studied as a function of temperature and applied electric field by using in situ grown heterostructures (Mg/${\mathrm{SrTiO}}_{3}$/${\mathrm{SrTiO}}_{3}$:Nb and Au/$…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward Ligand-Driven Light-Induced Spin Changing. Influence of the Configuration of 4 Styrylpyridine (stpy) on the Magnetic Properties of FeII(stpy)4(NCS)2 Complexes. Crystal Structures of the Spin-Crossover Species Fe(trans-stpy)4(NCS)2 and of the High-Spin Species Fe(cis-s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegiochemistry and Conformation of Poly(3-hexylthiophene) via the Synthesis and the Spectroscopic Characterization of the Model Configurational TriadsGiovanna Barbarella, Alessandro Bongini, and Massimo ZambianchiCite this: Macromolecules 1994, 27, 11, 3039–3045Publication D…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTropylium Ion Formation from Toluene: Solution of an Old Problem in Organic Mass SpectrometryChava LifshitzCite this: Acc. Chem. Res. 1994, 27, 5, 138–144Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 May 1994https://pub…
Abstract Pure polycrystalline Al (99.998%) was oxidized in dry oxygen and water. The surface products formed were analysed by ESCA. The thicknesses of the amorphous Al 2 O 3 formed during oxidation for 1 h in dry oxygen at 25°C and 250°C are 14 and 20 Å, respectively. During exposure of the oxidized sample to water a…
The safety and magnetic resonance (MR) imaging potential of BMS 180549, a new superparamagnetic iron oxide contrast agent, were evaluated in a phase I, open-label, placebo-controlled study involving 41 healthy subjects. No clinically significant postdose changes in physical examination findings, vital signs, or electr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox Processes on Pure Ceria and on Rh/CeO2 Catalyst Monitored by X-Ray Absorption (Fast Acquisition Mode)J. El Fallah, S. Boujana, H. Dexpert, A. Kiennemann, J. Majerus, O. Touret, F. Villain, and F. Le NormandCite this: J. Phys. Chem. 1994, 98, 21, 5522–5533Publication Da…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular Organization of Imidazolyl-Porphyrin to a Slipped Cofacial DimerYoshiaki Kobuke and Hidekazu MiyajiCite this: J. Am. Chem. Soc. 1994, 116, 9, 4111–4112Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 May 199…
Abstract The α‐relaxations in homogeneous polymer blends are often compared with the corresponding relaxations in their pure components, an effect that has long been associated qualitatively with concentration fluctuations. A novel “fluctuation model” describes very accurately the observed dielectric relaxation curves…
We have performed a thermodynamical analysis of the phase diagrams for ${\mathrm{ZrO}}_{2}$-CaO and ${\mathrm{ZrO}}_{2}$-MgO solid solutions which has demonstrated that differential heats of mixing are important parameters determining the stabilization of the cubic phase of ${\mathrm{ZrO}}_{2}$ by impurities. It is sh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCooperativity of the Coil-Globule Transition in a Homopolymer: Microcalorimetric Study of Poly(N-isopropylacrylamide)E. I. Tiktopulo, V. E. Bychkova, J. Ricka, and O. B. PtitsynCite this: Macromolecules 1994, 27, 10, 2879–2882Publication Date (Print):May 1, 1994Publication H…
A micromechanics method based on the Mori-Tanaka averaging scheme is used to predict the effective thermomechanical properties of composite materials reinforced by Shape Memory Alloy (SMA) fibers. Both elastic stiffness changes and transformation strains are taken into account in the constitutive modelling of the SMA…
From an analysis of current data on 16 protein structures with defined nucleotide-binding sites consensus motifs were determined for the peptide segments that form such nucleotide-binding sites. This was done by using the actual residues shown to contact ligands in the different protein structures, plus an additional…
The pathway of poly-beta-hydroxybutyric acid (PHB) exhibits a mode of transcriptional control induced by environmental stress. A new cybernetic model for coordinated regulation of stress-induced metabolism was developed to predict the growth and the synthesis of PHB in Alcaligenes eutrophus. A plausible objective for…
Chemical relaxation experiments were conducted on sintered samples of calcium‐doped lanthanum chromites by abruptly changing the oxygen partial pressure in the atmosphere and following the time change of conductivity. The re‐equilibration kinetics was analyzed by fitting the relaxation data to the solutions of Fick's…
Two methods are used to develop nondivergent, compact, sum-over-states formulas for dynamic hyperpolarizabilities up to fifth order. Expressions for both atoms and molecules are given; those at fourth and fifth order for the first time. The fifth-order formula is related to such nonlinear optical phenomena as stimulat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuasirelativistic Pseudopotential Study of Species Isoelectronic to Uranyl and the Equatorial Coordination of UranylPekka Pyykkoe, Jian Li, and Nino RunebergCite this: J. Phys. Chem. 1994, 98, 18, 4809–4813Publication Date (Print):May 1, 1994Publication History Published onl…
The modified embedded atom method (MEAM), an empirical extension of the embedded atom method (EAM) that includes angular forces, has been used to examine the interface between a silicon substrate and a thin overlayer of nickel. A brief review of the MEAM is given and parameters are determined for the Si-Ni system. As…