Materials Literature
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The temperature dependence of electrical conductivities In WO3-x (O ≤ x ≤ 0·28) has been investigated. These compounds show metallic behaviour for x < 0·10 and non-metallic behaviour for x < 0·10. An Anderson transition takes place for the composition WO2·90 with complete polaronic transport in the non-metallic phase.…
A theoretical evaluation for Peek's law which yields the corona onset gradient is made in air for positive wire/cylinder and positive point/plane geometries. The physical and geometrical parameters used in Meek's criterion take into account the variation of apparent ionization coefficient λ1of air with humidity, press…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrisubstituted heteropolytungstates as soluble metal oxide analogs. 1. The preparation, characterization, and reactions of organic solvent soluble forms of the silicon-niobium heteropolytungstates Si2W18Nb6O778-, SiW9Nb3O407-, and the SiW9Nb3O407- supported organometallic co…
ABSTRACT A bilayer film consisting of stearic and palmitic acids as one layer and hydroxypropyl methylcellulose as the other was prepared. The permeability of this film to water vapor was tested under a variety of conditions involving film composition, temperature and relative humidity. This film exhibited permeabilit…
ABSTRACT Edible films composed of a water soluble, carbohydrate layer (hydroxypropyl methylcellulose) and various kinds of lipid layers were tested for resistance to water vapor permeability. Films were tested at 25°C and a relative humidity differential of 85%. Films containing solid lipids, such as beeswax, paraffin…
While the importance of calcareous deposits to the effectiveness and efficiency of marine cathodic protection is generally recognized, there has been relatively little research directed toward rationalizing the structure and properties of deposits and the role of influential variables in deposit formation. This paper…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of .mu.-oxalato copper(II) binuclear complexes exhibiting expected magnetic propertiesMiguel Julve, Michel Verdaguer, Alain Gleizes, Michele Philoche-Levisalles, and Olivier KahnCite this: Inorg. Chem. 1984, 23, 23, 3808–3818Publication Date (Print):November 1, 1984Pu…
"Light Scattering in Solids IV." Optica Acta: International Journal of Optics, 31(11), p. 1210
The effectiveness of polymeric damping materials in controlling resonant vibration problems has been established through many successful applications. The area of these applications range from aircraft structures to jet engine structures. An effort is underway to develop a viscoelastic damping design guide for use by…
The thermodynamics of stressed crystals that can change phase and composition is examined with particular attention to hypotheses used and approximations made, Bulk and surface conditions are obtained and for each of them practical expressions are given in terms of experimentally measurable quantities.The concept of o…
Electron microscopic morphometric techniques were used to measure accurately the cytoplasm and frustule volumes of 12 naturally occurring planktonic diatoms in the Laurentian Great Lakes. In addition, cytoplasm volumes were measured in 6 other algal species. Estimates of carbon content were then made by converting mea…
X-ray photoelectron spectroscopy has been used to investigate a range of manganese oxide compounds and the initial stages of oxidation of manganese metal. It is shown that the Mn 2p3/2 binding energy, the extent of multiplet splitting of the 3s level, and the O Is : Mn 2p3/2 signal intensity ratio vary systematically…
Nonlinear least-squares curve fitting is used to analyze Ni 2p spectra obtained from various nickel-oxygen compounds and Ni/Al 2 O 3 catalysts. Apart from NiO, which shows a characteristic discrete satellite peak 2 eV from the main 2p 3/2 peak, all other spectra exhibit variable peak asymmetry assigned to multiplet sp…
Measurement of the amount of electric charge (coulombs) generated during electrochemical reactivation from a potential in the passive range to the corrosion potential has been used to detect susceptibility to intergranular attack associated with precipitation of chromium carbides at grain boundaries. The surfaces to b…
A number of models for the analysis of moment structures, such as LISREL, have recently been shown to be capable of being given a particularly simple and economical representation, in terms of the Reticular Action Model (RAM). In contrast to previous treatments, a formal algebraic treatment is provided which shows tha…
A convenient and accurate technique for measuring the birefringence of liquid crystals at discrete wavelengths or as a continuous function of wavelength in the ultraviolet, visible, or infrared spectral regions is described. The method is based on determination of the phase differences which occur when monochromatic p…
The higher second-harmonic efficiency, in powder, of a new organic molecular crystal N-(4-nitrophenyl)-(L)-prolinol (NPP) is reported. Electronic polarizability of NPP molecules relates to that of other para-nitroaniline-like structures such as that of previously reported N-(2,4-dinitrophenyl) methyl alaninate (MAP),…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface selection rules for surface-enhanced Raman spectroscopy: calculations and application to the surface-enhanced Raman spectrum of phthalazine on silverM. Moskovits and J. S. SuhCite this: J. Phys. Chem. 1984, 88, 23, 5526–5530Publication Date (Print):November 1, 1984Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced resonance Raman spectroscopy of Rhodamine 6G adsorbed on colloidal silverPeter Hildebrandt and Manfred StockburgerCite this: J. Phys. Chem. 1984, 88, 24, 5935–5944Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Publishe…
The room-temperature structure of ferroelectric dicalcium lead propionate, DLP, has been determined: it is tetragonal with space group P4 1 (C 4 2 ) or P4 3 (C 4 4 ) with a=12.510(3) AA, c=17.314(2) AA, z=4. One of the six independent propionate groups in the structure is found to have its methyl carbon statistically…