Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFast Neutron Irradiation Effects on Polymers. 1. Degradation of Poly(methyl methacrylate)Shigenori Egusa, Kenkichi Ishigure, and Yoneho TabataCite this: Macromolecules 1979, 12, 5, 939–944Publication Date (Print):September 1, 1979Publication History Published online1 May 200…
The addition of a ${B}_{\mathrm{ij}}{S}_{i}^{x}{S}_{j}^{x}$-type coupling between the tunneling motion of one proton and the tunneling motion of another to the Ising model in a transverse-field Hamiltonian, or the addition of the probably larger ${S}_{i}^{x}{F}_{i}^{x}{Q}_{i}$-type pseudospin phonon coupling (describi…
Commercially pure α-Ti has been plastically deformed by rolling to strains up to 97%. Optical and electron metallographic observations on the deformed material have then been related to changes in the hardness and texture. It is concluded that, at strains of up to 20%, strain twinning is the major mode of deformation,…
Abstract Electron microscopy and dynamic mechanical spectroscopy (DMS) techniques were used to study the morphology and glass transition behavior of simultaneous interpenetrating networks (SIN's), based on three different castor oil derived elastomers, and polystyrene (PS) plastic erosslinked with 1 percent divinyl be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of a phase diagram for the lithium oxide-aluminum oxide (LiO0.5-AlO1.5) systemHarlan J. Byker, Isaac. Eliezer, Naomi. Eliezer, and Reed A. HowaldCite this: J. Phys. Chem. 1979, 83, 18, 2349–2355Publication Date (Print):September 1, 1979Publication History Publish…
Ein komplettes System zur Wasserzerlegung durch Licht (250W‐Lampe) besteht aus den Katalysatoren Pt und RuO 2 sowie dem Sensibilisator Ru(bpy) und dem Acceptor Methylviologen (MV 2+ ). 150 ml Lösung ergaben in 3 h 0.6 ml H 2 und 0.3 ml O 2 . magnified image
Four different film evaluation techniques, prism coupling, reflectance spectroscopy, ellipsometry, and mechanical measurement of a step height, have been compared by measuring the thickness and refractive index of thermally grown silicon dioxide and plasma‐deposited silicon nitride films. The four methods have similar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical reactivity of supported gold. A structural study by small-angle x-ray scattering and x-ray absorption spectroscopyG. Cocco, S. Enzo, G. Fagherazzi, L. Schiffini, I. W. Bassi, G. Vlaic, S. Galvagno, and G. ParravanoCite this: J. Phys. Chem. 1979, 83, 19, 2527–2538Pub…
Abstract Reversible plasticization of nylons with anhydrous ammonia is a new concept. In the present studies, nylons 6 and 11 have been plasticized with anhydrous ammonia and subsequently were solid‐state coextruded below the melting point. The plasticization is attained by a temporary disruption of the strong hydroge…
We present theoretical calculations for energy transfer and two-center optical processes involving simultaneous rare-earth electronic and O${\mathrm{H}}^{\ensuremath{-}}$ vibrational transitions in condensed matter. Along the lines sketched at the 1978 Paris Luminescence Conference [(J. Luminescence 1979)]. We use an…
Biopsies of sutured and grafted primate peripheral nerves were examined by light and electron microscopy after the final set of electrical measurements had been recorded. Inspection of all proximal stumps showed the expected regenerative activity which was not affected by the nature of the nerve repair. Transverse sec…
Transmission electron microscopy of single-cryatal non-stoichiometric spinel (MgO. 3–5 A12O3) deformed in compression at 1500°C have revealed dislocation networks in which the ½〈110〉 dislocations are extended by climb into ¼〈110〉 collinear partials. Dislocation nodes of two types are found, both of the form ½[110] + ½…
The cyclic deformation behaviour of silicon (3%)-iron single crystals has been investigated as a function of the number of cycles and the cyclic hardening curves have been correlated with the change of dislocation microstructures and surface slip patterns. The hardening curve can be divided into two parts, i.e. the ra…
The concentration‐dependence of cathodoluminescence efficiency for the rare earth (RE) activators Ce 3+ , Eu 3+ , Gd 3+ , or Tb 3+ in YAG is compared at 300° and 25°K and extends earlier work by the authors. Competitive recombination processes in the garnet phosphors include recombination at bulk lattice defect center…
Ion implantation has been used to produce crystalline phase transitions in nickel and 316 stainless steel. Doses of ∼1016 to 1017 ions·cm−2 of 40keV P+ at room temperature resulted in an f.c.c. to h.c.p. transition in nickel and an f.c.c. to b.c.c. transition in stainless steel. The orientation relationships between t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectral sensitization of the heterogeneous photocatalytic oxidation of hydroquinone in aqueous solutions at phthalocyanine-coated titanium dioxide powdersFu-Ren F. Fan and Allen J. BardCite this: J. Am. Chem. Soc. 1979, 101, 20, 6139–6140Publication Date (Print):September 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnisotropic mixed-valence systems. Dimers of the delocalized clusters [Ru3O(CH3CO2)6(L)3]n+John A. Baumann, Dennis J. Salmon, Stephen T. Wilson, and Thomas J. MeyerCite this: Inorg. Chem. 1979, 18, 9, 2472–2479Publication Date (Print):September 1, 1979Publication History Pub…
The corrosion rates of copper alloys 706 (90:10 Cu:Ni) and 715 (70:30 Cu:Ni) were measured, using rotating cylinder specimens in sea water that contained oxygen, sulfide, sulfur, and polysulfide, either singly or in combination. In addition a control test was performed using unpolluted deaerated sea water. Corrosion r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new view of the dynamics of singlet cis-trans photoisomerizationR. M. Weiss and A. WarshelCite this: J. Am. Chem. Soc. 1979, 101, 20, 6131–6133Publication Date (Print):September 1, 1979Publication History Published online1 May 2002Published inissue 1 September 1979https://…
We present a model to account for several major observations on growth control of animal cells in culture. This model is tested by means of kinetic experiments which show that exponentially growing animal cells whose ability to synthesize total protein has been inhibited with cycloheximide (by up to 70%) grow at rates…