Materials Literature
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A theoretical approach is presented for predicting the strengthening of brittle materials subjected to a residual stress distribution represented by a polynomial series. In the approach, the stress intensity factor for a surface crack is derived incorporating the effect of crack closure. The crack‐closure distance is…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe strain energy of diphenylcyclopropenone: a reexaminationArthur Greenberg, Reginald P. T. Tomkins, Mark Dobrovolny, and Joel F. LiebmanCite this: J. Am. Chem. Soc. 1983, 105, 23, 6855–6858Publication Date (Print):November 1, 1983Publication History Published online1 May 2…
A model for Schottky barrier‐like heterojunction photoelectrodes is presented. This model allows the calculation of the current‐voltage curves for such electrodes under different conditions of illumination and electrochemical charge transfer. SnO 2 ‐ coated n‐type Si electrodes in contact with the redox systems K 3 /…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRadical anions and radical trianions of tetracyanoarenoquinodimethanes. An ESR and ENDOR studyFabian Gerson, Rene Heckendorn, Dwaine O. Cowan, Arawinda M. Kini, and McRae MaxfieldCite this: J. Am. Chem. Soc. 1983, 105, 24, 7017–7023Publication Date (Print):November 1, 1983Pu…
This paper is related to a new method recently proposed by Australian authors for the study of lamellar gratings in electromagnetic theory. The present authors first recall the principle of this method and make some theoretical comments. Then they describe how numerical difficulties which appear in normal incidence an…
Experimental evidence from the literature is presented to demonstrate that adsorption of chemical substances in soils and related materials is significantly influenced by competition from other adsorbing chemicals. Both organic and inorganic ions are capable of competing for adsorption sites on soils. Potential compet…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMembrane-filter, direct-transfer technique for the analysis of asbestos fibers or other inorganic particles by transmission electron microscopyGarry J. Burdett and Anthony P. RoodCite this: Environ. Sci. Technol. 1983, 17, 11, 643–648Publication Date (Print):November 1, 1983…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSulfide bronzes: preparation and characterization of (RE)Pd3S4 (RE = Rare Earth)Douglas A. Keszler and James A. IbersCite this: Inorg. Chem. 1983, 22, 23, 3366–3367Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published inissue 1 Nove…
The intermediate phase (IP) between α and β phases of quartz, which has been reported previously by the present authors, was studied by a fine-beam X-ray Laue method. Then, one could find satellite reflections. The analysis shows that IP has a sinusoidal and displacive modulated structure which is characterized by 6 w…
A new route for synthesis of unsymmetrically substituted porphyrins is described. The route follows the earlier approach through pyrromethanes, tripyrrin hydrobromides, and a,c-biladiene dihydrobromides, except that the pyrromethane intermediate is elongated in an initially “clockwise” direction to give a benzyl tripy…
Simultaneous mechanical and molecular characterization of a composite system has been attempted with respect to the interface. The mechanical properties of an E-glass cloth/ y-methacryloxypropyltrimethoxysilane (γ-MPS)/bisphenol-A-fumarate polyester resin composite system were studied as a function of the amount of γ-…
The rate of olefin oxygenation catalyzed by synthetic metalloporphyrins is examined, employing sodium hypochlorite as the oxygen atom source. The rate of epoxidation and the stability of the catalyst are shown to be dependent on the nature of the axial ligand employed. A rationale for this effect is presented and anal…
Abstract Poly( p ‐phenylene), poly(2,6‐naphthylene), poly(2,7‐naphthylene), poly(1,5‐naphthylene), and poly(1,4‐naphthylene) were prepared by nickel‐catalyzed polycondensation of Grignard reagents from the corresponding dibromides. The polymers were annealed in vacuo. Doping with SbF 5 markedly increase the conductivi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective ring-opening polymerization of di-O-methylated and di-O-benzylated 1,4-anhydro-.alpha.-D-ribopyranoses and structure proof of synthetic cellulose-type polysaccharide (1 .fwdarw. 4)-.beta.-D-ribopyranan and (1 .fwdarw. 5)-.alpha.-D-ribofurananToshiyuki Uryu, Junichi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular Photochemical Electron Transfer. 1. EPR and Optical Absorption Evidence for Stabilized Charge Separation in Linked Porphyrin-Quinone MoleculesAlan R. McIntosh, Aleksander Siemiarczuk, James R. Bolton, Martin J. Stillman, Te Fu Ho, and Alan C. WeedonCite this:…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuasirelativistic SCF-X.alpha. scattered-wave study of uranocene, thorocene, and ceroceneNotker Roesch and Andrew Streitwieser Jr.Cite this: J. Am. Chem. Soc. 1983, 105, 25, 7237–7240Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Publi…
This paper describes detailed studies on the chlorination of vulcanized elastomer surfaces by an organic chlorine donor and the bonds obtained between such surfaces using a polyamide-cured epoxy adhesive. The bonds produced with a range of commercially important elastomers were found to retain their strength during ex…
A piezoelectric ceramic actuator element with multilayer internal electrodes has been investigated. It was fabricated by multilayer ceramic capacitor techniques. An individual internal electrode has the same area as the element cross section area. It has no piezoelectric inactive part, so that it shows original strain…
X-ray absorption edge and extended x-ray absorption fine structure studies have been undertaken on resting (ferric) horseradish peroxidase, HRP compound I (HRP-I), HRP compound II (HRP-II), and several highly oxidized synthetic iron porphyrins that may have relevance as models for the iron site in horseradish peroxida…
Two-photon dye-laser excitation is used to observe numerous sharp $4{f}^{7}$ levels of ${\mathrm{Eu}}^{2+}$ in Ca${\mathrm{F}}_{2}$ and Sr${\mathrm{F}}_{2}$ which are overlapped by the $4{f}^{6}5d$ band, and thus inaccessible to single-photon spectroscopy. $4{f}^{7}$ excited states belonging to the $^{6}I$ and $^{6}D$…