Materials Literature
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The presence of radial-axial hydride in pressure tubes in CANDU reactors is to be avoided since it can result in significant reductions in fracture toughness. Fabrication procedures produce tubes which have little radial-axial hydride when hydrided without stress. A quantitative technique for evaluating the susceptibi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of metal ions with humic acid-like models. Part 4. Synthesis, spectral properties, and crystal and molecular structure of tetrakis(.mu.-2,6-dimethoxybenzoato)diaquadicopper(II) and of bis(.mu.-2,6-dimethoxybenzoato)bis(.mu.-acetato)diaquadicopper(II), a case of a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAliphatic semidiones. 44. Spin probes derived from dithiolsGlen A. Russell, W. C. Law, and Mary ZaletaCite this: J. Am. Chem. Soc. 1985, 107, 14, 4175–4182Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://…
Abstract The last comprehensive review of tire-cord adhesion to rubber was reported by T. Takeyama and J. Matsui in Rubber Reviews for 1969. They covered this subject in depth from its scientific beginnings and dealt mostly with rayon, nylon, and polyester tire-cord adhesion. The objective of this present review will…
Time domain fluorescence spectrometry offers a versatile and powerful approach to the analysis of heterogeneous emitting systems. In this paper we describe a new approach, based on software, to the acquisition of phase and modulation resolved spectra. Mixtures of fluorophores with different lifetimes can be analyzed i…
Abstract The reaction of pyromellitic dianhydride (PMDA) and aromatic diamine in an aprotic solvent such as dimethylacetamide (DMAc) gives a solution of poly(amic acid). The effects of certain variables on the polymerization and some additives on the stability and imidization of the poly(amic acid)s were studied. It w…
A nonequilibrium periodic structure is induced by a magnetic field H applied to an aligned lyotropic uniaxial nematic phase of disodium cromoglycate–water. A series of parallel lines perpendicular to H represents boundaries between 180° out-of-phase regions of director reorientation. The distance between the lines dec…
A three-dimensional high-order finite-element scheme is proposed for finding the modes of dielectric-loaded cavities of arbitrary shape. New light is shed on the presence of spurious solutions. Results for an empty rectangular box are compared with exact solutions, A loaded rectangular box is also analyzed.
An investigation was made as to the effect of trace impurities, particularly bismuth and boron, on etching morphology and capacitance of aluminum electrolytic capacitor foil. It was found that as little as 2 wt‐ppm bismuth in foil strongly accelerated surface etching, inhibited tunneling, and consequently lowered capa…
The pairwise, long-range attractions experienced by a polymer chain in poor solvent, are resisted by the screened (two-body) and by the three-body interactions. While the former are due to the nonzero effective chain thickness and are especially important for relatively short chains, the latter arise from interdepende…
It is demonstrated that the slip flow Reynolds equations for ultra low clearance gas bearings can be derived from kinetic theory by an approximation scheme appropriate for arbitrary Knudsen numbers. Thus the usefulness of the slip flow Reynolds equation is extended to cases where it would not be expected to hold.
Abstract Dielectric results at frequencies between 6 × 10 −4 and 10 5 Hz are given for the β relaxation region of poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), poly(butyl methacrylate) (PBMA), and poly(isobutyl methacrylate) (PisoBMA). Apparent activation energies and relaxation strengths are calc…
Measurements are presented of the magnetization of mild steel, at field strengths between 100 A/m and 1200 A/m, for hysteretic and anhysteretic conditions. Magnetization was parallel or perpendicular to an applied uniaxial stress. The experimental results showed that tension parallel to the field or compression perpen…
The percolation properties of two-dimensional rotationally invariant granular random elastic networks (the disk model) are studied by use of both numerical simulations and finite-size scaling analysis. For the case of normal--empty-bond random networks, an exponent f\ensuremath{\approxeq}3.2\ifmmode\pm\else\textpm\fi{…
X-ray dichroism is observed at the L absorption edges of Pt in K2PtCl4, and the anomalous scattering tensor for Pt in this square-planar complex is measured in experiments with linearly polarized synchrotron radiation. For special azimuthal settings the diffraction intensities of some reflections depend on only one or…
Abstract Phyllosilicates in samples from Gulf Coast cores and the Martinsburg Formation near Lehigh Gap, Pennsylvania (which together represent a continuous sequence from mudstone to slate) are shown by TEM studies to possess imperfections on a massive scale and to exhibit a progressive increase in perfection through…
Reverse-phase chromatography, aqueous gel exclusion, and nonaqueous gel exclusion were assessed as procedures for preparative fractionation of the tumor-localizing product hematoporphyrin derivative. Porphyrin accumulation, fluorescence, and photodynamic cytotoxicity were monitored using the murine Sarcoma 180 tumor.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of pore volume distribution from size exclusion chromatography dataKarel. JerabekCite this: Anal. Chem. 1985, 57, 8, 1595–1597Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTArtificial allosteric system. 2. Cooperative 1-methylimidazole binding to an artificial allosteric system, zinc-gable porphyrin-dipyridylmethane complexIwao Tabushi, Shinichi Kugimiya, Michael G. Kinnaird, and Tomikazu SasakiCite this: J. Am. Chem. Soc. 1985, 107, 14, 4192–4…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of oxygen atom transfer from high valent iron porphyrins to olefins: implications to the biological epoxidation of olefins by cytochrome P-450Thomas Kodadek, Scott A. Raybuck, James P. Collman, John I. Brauman, and Lisa M. PapazianCite this: J. Am. Chem. Soc. 1985,…