Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of crystallite size and support on the carbon monoxide hydrogenation activity/selectivity properties of iron/carbonValiant K. Jones, Loren R. Neubauer, and Calvin H. BartholomewCite this: J. Phys. Chem. 1986, 90, 20, 4832–4839Publication Date (Print):September 1, 198…
Scale microfossils are locally abundant in rocks of the uppermost Tindir Group and basal beds of the overlying Funnel Creek Limestone in northwest Canada. Co-occurring organic-walled fossils in this microbial mat biota resemble forms described from the Upper Proterozoic but mineralized spicules of Cambrian aspect are…
Abstract A method is given for quantitative analysis of IR spectra of dioctahedral micas in the OH-stretching region, which involves spectral decomposition and correlation of octahedral cation contents with integrated optical densities of the corresponding bands. It provides a basis for the study of order-disorder in…
An engineering fracture mechanics approach was applied to the analysis of the fracture resistance of equine hoof-wall. The relationship between fracture toughness and the morphological organization of the keratin hoof tissue was investigated. Fracture toughness was evaluated using the J-integral analysis method which…
Abstract The mechanism of Ni-Mg substitution has been studied by X-ray absorption spectroscopy in phyllosilicates belonging mainly to the lizardite-nepouite and kerolite-pimelite series. Two types of information were obtained: (1) Analysis of nickel K -edge spectra under high resolution confirmed that Ni atoms were su…
The self consistent field multiple scattering Xa model has been used to calculate the electronic structure and the magnetic coupling constant, J , of planar and pseudotetrahedral [ C U ~ C I ~co]m~p-l exes with the aim of exploiting the actual possibilities of the model to describe the spectral (electronic and EPR) an…
Abstract A novel approach to the determination of crystallite size and lattice strain by means of Total Pattern Analysis is described. Parameters to define the position, magnitude, breadth and shape of individual peaks are obtained by an adaptation of the pattern fitting program of Sonneveld and Visser ( J. Appl. Crys…
Highly conductive and transparent films of Si-doped ZnO have been prepared by rf magnetron sputtering of a ZnO target with SiO 2 or SiO dopant added. Films with resistivity as low as 3.8×10 -4 Ω cm and average transmittance above 85% in the visible region can be produced on low temperture substrates at below 250°C. Gr…
Peroxotungstic acid coated films were investigated for applications to electrochromic display devices. Films coated with peroxotungstic acid aqueous solutions exhibited electrochromism in non-aqueous electrolyte solutions containing Li-salts. A good reversibility for the electrochromic reaction was attained after seve…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUniversal scaling equation for self-diffusion by macromolecules in solutionGeorge D. J. PhilliesCite this: Macromolecules 1986, 19, 9, 2367–2376Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 September 1986https://d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural studies of the hydrogen storage material magnesium nickel hydride (Mg2NiH4). 2. Monoclinic low-temperature structurePeter Zolliker, K. Yvon, J. D. Jorgensen, and F. J. RotellaCite this: Inorg. Chem. 1986, 25, 20, 3590–3593Publication Date (Print):September 1, 1986…
Abstract Strontium cobaltates in the composition range, SrCoO 2.29 ‐SrCoO 2.80 , have been prepared under various conditions with respect to the oxygen pressure and temperature. Samples prepared at high temperatures (above 800°C) crystallized in the brownmillerite or perovskite type Structure Depending on oxygen Defic…
Abstract γ‐phase crystals of isotactic polypropylene (iPP) obtained from low‐molecular‐weight extracts of pyrolyzed polymers are examined by electron microscopy and electron diffraction. γ‐phase crystals differ from α‐phase crystals in three important respects: (i) they are elongated along the b * rather than the a *…
The influence of skin friction on the perception of fabric texture and pleasantness (acceptability) was studied by exposing eight men to a sequence of environmental conditions: neutral (comfortable), hot-dry, hot-humid, and return to neutral. The air and dew point temperatutes ( T a : T dp ) of these conditions were 2…
Quasiperiodic ordering is studies in a GaAs-AlAs Fibonacci superlattice by high-resolution x-ray scattering. The data are consistent with the predicted dense set of diffraction vectors. Moderately large growth fluctuations in the sequential deposition of GaAs and AlAs layers do not appear to disturb seriously the quas…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUse of noble metals in automobile exhaust catalystsJ. T. KummerCite this: J. Phys. Chem. 1986, 90, 20, 4747–4752Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 September 1986https://pubs.acs.org/doi/10.1021/j100411a…
We study the fluctuating nonlinear hydrodynamics of compressible fluids. Development of the appropriate field-theoretical description for this problem requires treatment of nonlinearities which arise through the relationship g=\ensuremath{\rho}V, where g is the momentum density, \ensuremath{\rho} is the mass density,…
The present work pretends to give a quick answer to a professional request, which is to classificate building materials. With that purpose this work analyses some of the different existing systems of classification, creating an operating system to choose a building material attending its specific properties as a const…
The effect of an industrial process of surface treatment ("fire jet") of ornamental rock slabs upon the mineralogical and textural characteristics of an igneous rock known commercially as "Pink Porriño" (Rosa Porriño) rom Galicia (NW Spain), has been studied by optical and electron microscopy. The most important physi…
With the aid of a 400-litre capacity pilot furnace, in which 40 Kg of rice husk is submitted to controlled combustion, an ash (RHA) is obtained for use as an addition, the physicochemical properties of which form the focal point of this work. Results will also be presented for the combustion power of the husk ≃ 4000 k…