Materials Literature
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Global damage indices based on equivalent modal parameters are defined using the vibrational parameters of an equivalent linear structure. In continuum mechanics‐based damage models, effects of the growth and coalescence of microcracks are accounted for through the definition of an internal or local damage variable. D…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, luminescence, and excited-state complexes of the tris(1,10-phenanthroline)- and bis(terpyridine)iridium(III) cationsN. P. Ayala, C. M. Flynn Jr., LouAnn Sacksteder, J. N. Demas, and B. A. DeGraffCite this: J. Am. Chem. Soc. 1990, 112, 10, 3837–3844Publication Date…
The fracture‐toughness‐determining mechanism of silicon carbide with additions of yttria and alumina was studied. Observations of indentation crack profiles revealed that significant crack deflection had occurred. Median deflection angles increased with increased volume fractions of the second phases, which was accomp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBiodegradable film derived from chitosan and homogenized celluloseJun Hosokawa, Masashi Nishiyama, Kazutoshi Yoshihara, and Takamasa KuboCite this: Ind. Eng. Chem. Res. 1990, 29, 5, 800–805Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Publ…
Rylenes are annelated arenes derived formally by coupling all the peri-positions of naphthalene. Several soluble oligorylenes have now been synthesized as models for “polyrylene” 1. R = H. Among the most striking features to emerge in the course of characterizing the compounds were a small HOMO/ LUMO energy gap for th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh turnover rates in pH-dependent alkene epoxidation using NaOCl and square-planar nickel(II) catalystsHeungsik Yoon, Thomas R. Wagler, Kenneth J. O'Connor, and Cynthia J. BurrowsCite this: J. Am. Chem. Soc. 1990, 112, 11, 4568–4570Publication Date (Print):May 1, 1990Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLong-lived nonmetallic silver clusters in aqueous solution: a pulse radiolysis study of their formationPaul. Mulvaney and Arnim. HengleinCite this: J. Phys. Chem. 1990, 94, 10, 4182–4188Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Publish…
Studies of the interaction of oxygen with some transition metal surfaces are limited by activation barriers to adsorption and reaction of O2. These barriers can be surmounted by using oxidants more powerful than O2 to chemisorb oxygen on these surfaces under ultrahigh vacuum (UHV) conditions, but at high ‘‘effective’’…
BaTiO 3 modified with grain‐boundary resident ZrO 2 (≤ 2 wt%) results in substantial chemical modification of the microstructure when sintered at 1320°C for 2 h. These modified regions were seen as core‐shell grains in the micro‐structure and were accompanied by an increase in the internal stress level. The shells had…
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 Y. Hirooka, R. W. Conn, T. Sketchley, W. K. Leung, G. Chevalier, R. Doerner, J. Elverum, D. M. Go…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxazoline having a coumarin moiety as a pendant group. Synthesis and photogelationYoshiki Chujo, Kazuki Sada, and Takeo SaegusaCite this: Macromolecules 1990, 23, 10, 2693–2697Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published ini…
We have investigated reaction‐forming of silicon carbide by the infiltration of carbonaceous preforms using alloyed silicon melts, in order to synthesize composite materials free of the residual silicon phase that has previously limited mechanical properties and upper use temperatures. In this approach, rejection of t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(aryl ether-benzoxazoles)J. G. Hilborn, J. W. Labadie, and James L. HedrickCite this: Macromolecules 1990, 23, 11, 2854–2861Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 May 1990https://pubs.acs.org/doi/10.1021/ma00…
Lipid vesicles (liposomes) containing pH-sensitive fluorophores were used as probes for the study of liposome entry and intracellular fate. Pyranine [8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS)] was entrapped in the liposome aqueous core during preparation to provide a means of detecting internalization into living cell…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT[(MeC5H4)3U]2[.mu.-1,4-N2C6H4]: a bimetallic molecule with antiferromagnetic coupling between the uranium centersRobert K. Rosen, Richard A. Andersen, and Norman M. EdelsteinCite this: J. Am. Chem. Soc. 1990, 112, 11, 4588–4590Publication Date (Print):May 1, 1990Publication…
The off-resonant electronic third-order optical susceptibility is derived in the dipole approximation using the method of averages. These results are studied in detail for the two-, three-, and N-level model to determine the origin of the susceptibility with symmetry considerations. If the matrix elements are independ…
Abstract The anionic polymerization of L‐lactide was studied with four potential initiators of different basicity: potassium benzoate, potassium phenoxide, potassium tert ‐butoxide and butyllithium. Regardless of the solvent, only the two most basic initiators proved to be reactive enough to initiate and maintain the…
The DOPA-rich polyphenolic protein secreted by the marine mussel Mytilus edulis establishes key chemical linkages in a water-resistant adhesive. Molecular cloning of the gene for this remarkable protein reveals its primary structure as one of the most repetitive proteins identified in the animal kingdom. Expression an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInternal reforming development for solid oxide fuel cellsAnthony L. Lee, R. F. Zabransky, and W. J. HuberCite this: Ind. Eng. Chem. Res. 1990, 29, 5, 766–773Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 May 1990https://…
Polyimides can undergo reversible electrochemical reduction/oxidation reactions. The electroactive centers have been identified as involving the aromatic‐carbonyl π‐system of the imide functional groups. The aromatic structure and substitution on the imide moiety affects the redox potentials. The reduced (radical‐anio…