Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition State of the Silicon-Directed Aldol Reaction: An ab Initio Molecular Orbital StudyBenjamin W. Gung, Zhaohai Zhu, and Rebecca A. FouchCite this: J. Org. Chem. 1995, 60, 9, 2860–2864Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Hydroxide Ion on the Cis-Trans Thermal Isomerization of Azobenzene DerivativesAna M. Sanchez and Rita H. RossiCite this: J. Org. Chem. 1995, 60, 10, 2974–2976Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1…
The corrosion behaviour of glassflake epoxy coatings on steel substrate with and without an adhesion promoter was examined by electrochemical impedance spectroscopy. The impedance data show that an improvement in the protective behaviour of the coating is connected with a large increase in the resistance in the pores…
Accurate prediction of the thermomechanical responses of particle beds in fusion blankets depends strongly on the availability of experimental data on their thermal properties as a function of the blanket operating conditions. In this study, a series of experiments is conducted to measure the effective thermal conduct…
The usefulness of x‐ray photoelectron spectroscopy to study surface structural aspects of polymer electrolytes has been demonstrated by its application to complexes of poly(ethylene oxide) with lithium perchlorate or copper perchlorate in various molar ratios. The binding energies for various core level electrons of t…
Morphological investigations of specimens of Navicula gregaria, N. cryptocephala, N. cryptocephala var. exilis, N. capitatoradiata, N. veneta and N. phyllepta were performed using light and electron microscopy. Both type and modem samples were examined. The typification of each taxon was reviewed; Patrick's typificati…
The prediction of core losses in a rotating electrical machine generally requires a numerical approach (finite element or integral method). However, the magnetic characteristics obtained through a standard Epstein facility and inserted in the numerical models predict losses which are quite different from those obtaine…
Several grades of 18% chromium-8% nickel stainless steel (SS) with varying sulfur contents and immersed in 3% sodium chloride (NaCl) demonstrated essentially passive behaviors, with local depassivation events monitored as sharp negative changes in the free corrosion potential. Electrochemical desulfurization or trappi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudy of the Activity and Deactivation of Ni-YSZ Cermet in Dry CH4 Using Temperature-Programmed TechniquesRichard T. Baker and Ian S. MetcalfeCite this: Ind. Eng. Chem. Res. 1995, 34, 5, 1558–1565Publication Date (Print):May 1, 1995Publication History Published online1 May 2…
Abstract 12 bis‐ and tris(maleimide)s were synthesized and characterized and their reactions with polyamides in the melt were examined. It was found that the double bonds of the maleimides react with terminal amino groups of the polyamides to form elastomeric networks. The chemical and physical properties of these ela…
Single phase γ′-Fe4N type (Fe1−xNix)4N compounds (0≤x≤0.6) have been synthesized by heating iron-nickel oxalates under a mixture stream of NH3 and H2. The compounds were investigated by x-ray diffraction and Mössbauer spectroscopy. The results confirm that the lattice constants decrease with increasing content of nick…
The switching behaviour of 1,3,6,8-tetrakis-((S)-2-(heptyloxy)propanoyloxy)pyrene was studied near room temperature in a monotropic columnar phase. The switching angle (optical tilt angle) increases linearly with the applied electric field from 0° to c. ± 10° at ± 0.35°/(V μm −1), then rapidly increases to its upper l…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced Electron Transfer from Eosin and Ethyl Eosin to Fe(CN)63- in AOT Reverse Micelles: Separation of Redox Products by Electron-Transfer-Induced HydrophobicityErnesto Joselevich and Itamar WillnerCite this: J. Phys. Chem. 1995, 99, 18, 6903–6912Publication Date (Pri…
A two-dimensional nonisothermal mathematical model has been developed to simulate a tube-and-shell configuration, catalytic membrane reactor. The three-layer membrane consists of an inert large-pore support, an o2 semipermeable dense perovskite layer and a porous catalytic layer. The model is applied to the simulation…
Abstract Nonisothermal crystallization kinetic data obtained from differential scanning calorimetry (DSC) for a poly(ethylene terephthalate) are corrected for the effects of temperature lag between the DSC sample and furnace using the method of Eder and Janeschitz‐Kriegl which is based on experimental data alone witho…
The adsorption of y-aminopropyltriethoxysilane (y-APS) onto stainless steel substrates has been investigated by Low-Energy Electron Induced X-ray Spectrometry (LEEIXS). Results reported in this work show the influence, on the film thickness, on the one hand, of silane concentration, pH, aging time and alcohol/water ra…
A novel and convenient method of monitoring the internal surface area of a porous silicon layer formed on an n-type substrate has been developed. The technique has been employed during electrochemical growth and subsequent chemical leaching of porous silicon layers in hydrofluoric acid/ethanol. The method involves per…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic versus Antiferromagnetic Exchange in Five Structurally Analogous Carboxylate-Bridged Trinuclear Ferrous ComplexesDavid P. Goldberg, Joshua Telser, Cecilia M. Bastos, and Stephen J. LippardCite this: Inorg. Chem. 1995, 34, 11, 3011–3024Publication Date (Print):M…
Deals with the qualitative and quantitative analysis of the tailorability of lightweight wool fabrics, as well as studies related to the interaction between the ease of tailorability and performance characteristics of wool fabrics. The role of mechanical/physical properties of fabric in the making‐up process as regard…
The phase behavior of the three-component PEO-PPO-PEO/dextradwater system has been studied. Pluronic L64, P105, and F68 were used, and they are members of a family of triblock copolymers with the structure PEO-PPO-PEO, where PEO is poly(ethy1ene oxide) and PPO poly- (propylene oxide). Moreover, these triblock copolyme…