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Published treatments of peel mechanics are shown to yield inconsistent relations for the dependence of peel force upon the angle of peel. The paradox is resolved by limiting the stress analyses to small bending deformations of the detaching strip in the still-attached region. This condition holds when the moment arm o…
Pd–SnO2 catalysts are more active for CO oxidation than either Pd–SiO2 or SnO2, but are relatively inactive for C2H4 hydrogenation; grinding of Pd–SiO2 and SnO2 mixtures enhances CO oxidation activity, indicating that Pd induces activity on the SnO2 surface.
On analyse les déclins de luminescence, à toutes températures comprises entre 4 et 500 K, des centres Bi3+ incorporés dans les oxydes de terres rares La2O3 et Y2O3, les métaantimoniates CaSb 2O6 et SrSb2O6 avec et sans compensation de charge, et dans l'antimoniate de terre rare Y2LuSbO7. En utilisant de plus les résul…
A matrix variational calculation has been done for electron scattering by atomic O, which includes $2{s}^{2}2{p}^{4}$, $2s2{p}^{5}$, and $2{p}^{6}$ target configurations and all possible single excitations of the $2p$ orbital. Integral and differential cross sections are reported for elastic and inelastic scattering f…
Oxidation on the 2 crystal faces of SiC platelets was studied. The oxidation of the C face followed a simple parabolic law and was oxide‐diffusion controlled, whereas that of the opposite crystal face exhibited a linear growth rate which was surface‐reaction controlled. Previous investigators, who studied the oxidatio…
Abstract
Abstract The distribution of alkali metal picrate complexes of macrocyclic polyether (dibenzo-18-crown-6) between water and benzene was investigated. The polyether-cation complexes were found to be of a 1:1 stoichiometry. The formation of 2:1 complexes was recognized for Rb and Cs in a large excess of the poiyether. T…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation R. Hasegawa, B. E. Argyle, L‐J. Tao; Temperature dependence of magnetization in amorphous Gd‐Co‐M…
Under tensile strain the inhomogeneous surface microstructure of thin polystyrene films gave rise to the formation of ∼300 Å nuclei in which large strains were localized even at the glass transition. At lower temperatures these nuclei coalesced into disk-shaped microneck zones. Fibril formation within these zones and…
A system which accomplishes high−speed, electron−stimulated Auger electron spectroscopy (AES) and x−ray photoelectron spectroscopy with a double−pass cylindrical−mirror analyzer (CMA) is described. The CMA is well suited for AES because of its very high transmission, but has found very limited use in ESCA studies. In…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible oxygenation and autoxidation of a capped porphyrin iron(II) complexJoseph Almog, Jack E. Baldwin, and Joel HuffCite this: J. Am. Chem. Soc. 1975, 97, 1, 227–228Publication Date (Print):January 1, 1975Publication History Published online1 May 2002Published inissue…
The dependence of the steady-state creep rate, εs, on stress, σ, and temperature, T, for pure copper and a two-phase copper–4.04 wt.-% cobalt alloy at 712 K can be described asFor copper, the stress exponent, n, is ∼4.8 and the activation energy for creep, Q c, is ∼ 115 kJ/mol. For the copper–cobalt alloy, n≃5 and Qc≃…
In this article we demonstrate the importance of the indirect interaction via the phonon field between pairs of defects in an amorphous material. Using only the approximate value of the lattice coupling constant it is shown that the exchange interaction is large. The most important conclusion that can be drawn from th…
The electric permittivity of nematic 44′ n-pentylcyanobiphenyl has been measured in the presence of electric and magnetic fields. Values of the permittivity components for the aligned state have been obtained and analysed in terms of the statistical theory of Maier and Meier. The behaviour of bulk samples of the mater…
Extraction of fetal bovine skin at neutral pH and in the presence of protease inhibitors solubilized substantial amounts of type I and type type III collagen and Type III procollagen. Type I and Type III collagen were separated from each other by salt precipitation, and DEAE-cellulose chromatography was used to separa…
The interactions of O2, H2O, CO, CO2, NO, N2O, NO2, H2S and SO2 with evaporated nickel films have been studied over temperatures of 77 to 400 K and adsorbate pressures of 10–8 Torr to several Torr. The reactions range from reversible adsorption at 77 K only (CO2) to complex molecular and dissociative adsorptions leadi…
Kinichiro KAJIKAWA, Toshiki YAMAGUCHI, Shogo KATSUDA, Atsuo MIWA; An Improved Electron Stain for Elastic Fibers Using Tannic Acid, Journal of Electron Micr
The mean escape depths of Si 1s, Si 2p, and O 1s photoelectrons from silicon−silicon dioxide structures were determined over a wide kinetic−energy range with magnesium, aluminum, and chromium x−ray sources. Variations in photoelectron line intensity were measured as a function of oxide film thickness. Film thicknesses…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction of Crystalline Pyrophosphoric Acid and Its SaltsChung Y. ShenCite this: Ind. Eng. Chem. Process Des. Dev. 1975, 14, 1, 80–85Publication Date (Print):January 1, 1975Publication History Published online1 May 2002Published inissue 1 January 1975https://pubs.acs.org/d…
Des amphiboles orthorhombiques participent fréquemment aux paragenèses des amphibolites à sapphirine des Pyrénées. Leur composition, remarquablement alumino-magnésienne, permet d'élargir le domaine de composition actuellement connu pour ces minéraux. Un des échantillons représente le terme naturel le plus proche, actu…