Materials Literature
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Abstract Crystallographic studies of micro-inclusions in diamond coat, carried out by analytical electron microscopic techniques, show that structures possessing rhombohedral symmetry form a significant fraction of the population of well-crystaUised particles. They are, however, less frequent than apatite or biotite,…
Shape memory alloy reinforced composites are an extremely versatile class of materials with adaptive characteristics that may be exploited for damage control, active structural acoustic control, dynamic tuning, and shape control. In order to design structures reliably with embedded shape memory alloy actuators, a fund…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of seven-coordinate tantalum(I) and niobium(I) complexes with cis carbonyl and alkyl isocyanide ligandsEdmund M. Carnahan, R. Lynn Rardin, Simon G. Bott, and Stephen J. LippardCite this: Inorg. Chem. 1992, 31, 25, 5193–5201Publication Date (Pri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConformations of polymer melts between parallel surfaces: comparison of the Scheutjens-Fleer lattice theory with Monte Carlo simulationsGrant D. Smith, Do Y. Yoon, and Richard L. JaffeCite this: Macromolecules 1992, 25, 25, 7011–7017Publication Date (Print):December 1, 1992P…
Abstract Perfluoro(vinyl ether) derivatives are extremely versatile monomers in preparing a variety of functional fluoropolymers. In this paper, two challenging topics in the development of novel fluoropolymers will be introduced. Carboxylated perfluoro(vinyl ether) can be copolymerized with tetrafluoroethylene to aff…
Abstract Raman scattering on commercial filters containing CdSe x S 1– x microcrystals is reported. The composition x is determined by the difference between CdS‐ and CdSe‐like LO phonon frequencies. A simple phonon confinement model in the microcrystals is suggested to explain the observed red‐shift of the Raman freq…
Attached populations of corrosion enhancing sulfate-reducing bacteria (SRB) and organic acid-producing bacteria (APB) were measured on steel plugs at an oil field water injection plant near Wainwright, Alberta. The sample plugs were colonized to ca. 10 6 SRB/cm 2 . Counts for APB ranged from 10 2 to 10/cm 2 . Scanning…
Dielectric properties have been studied for single crystals of various TMMnC (N(CH3)4MnCl3)-type compounds; TMMnC, TMMnB, TMNiC, TMNiB, TMCdC, TMCdB, and TMCuC, Dielectric constants show stepwise anomalies at the structural phase transitions of these compounds. In TMCdB, ferroelectricity is found below the Curie tempe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and bonding in M8C12 clustersZhenyang Lin and Michael B. HallCite this: J. Am. Chem. Soc. 1992, 114, 25, 10054–10055Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.acs.org/doi/10.1…
The use of tannic acid to inhibit metal corrosion has been a controversial issue, particularly in relation to its application to rusted steel prior to painting. In this work, the protective efficiency of aqueous solutions of tannic acid applied on uncontaminated rusted steel is studied. This is done by investigating t…
I develop a new method of ray tracing that can be used to analyze the refraction or reflection of rays by both uniaxial and biaxial crystals.
Abstract A photochromic spiroindolinonaphthoxazine derivative, 1,3,3‐trimethyl‐9′‐hydroxy‐spiro[indoline‐2,3′(3 H )‐ naphtho[2,1‐ b ][1,4]oxazine] 3 was synthesized by condensation of 1,2,3,3‐tetramethylindolenium iodide 1 and l‐nitroso‐2,7‐dihydroxynaphthalene 2 . Further, two new derivatives, 5 and 7 , were prepared…
Dielectric measurements have been performed in both the deuterated and undeuterated proton glass rubidium ammonium dihydrogen arsenate ${\mathrm{Rb}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$(${\mathrm{NH}}_{4}$${)}_{\mathit{x}}$${\mathrm{H}}_{2}$${\mathrm{AsO}}_{4}$ along the tetragonal a axis. Ammonium concentrations x…
The polarized fluorescence of a total of 12 ${\mathrm{Ho}}^{3+}$ ion centers present in ${\mathrm{CaF}}_{2}$- and ${\mathrm{SrF}}_{2}$-type crystals and having a variety of ${\mathrm{Ho}}^{3+}$ ion symmetries has been analyzed to give possible model assignments. In contrast to the earlier results for ${\mathrm{SrF}}_{…
The precipitation of oxygen has been investigated for 2 MeV electron irradiated silicon samples, with irradiation doses 1015–1018 cm−2, at an annealing temperature of 900 °C for up to 444 h. The samples initially contained either different concentrations of the vacancy-oxygen (VO) center created at the irradiation, or…
Abstract Results on solution‐blended poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) blends are reported. Dichloroacetic acid was used as the cosolvent for blending. PEEK and PEI are confirmed to be miscible in the melt. The glass transition, T g , behavior obeys the simple Fox equation or the Gordon‐Taylo…
The tissue distribution and normal tissue toxicity of cisplatin (cDDP) administered as poly-lactide-co-glycolide (PLAGA) microspheres, developed for loco-regional administration of cDDP to the liver, were studied in Wag/Rij rats. Venoportal administration of this formulation resulted in a reduction in total systemic a…
The compressive creep behavior of single‐crystal 6H α‐SiC was measured for orientations parallel to and at 45° to [0001]. Deformation of the 45° orientation was dominated by basal slip. Steady‐state creep rates above 10 ‐7 /s were measured at temperatures as low as 800°C. An activation energy of 277 kJ/mol and a stres…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic spectrum of allyl and allyl-d5 radicals: the B[12A1] .rarw. X[12A2], C[22B1] .rarw. X[12A2], and D[12B2] .rarw. X[12A2] band systemsJoel A. Blush, David W. Minsek, and Peter ChenCite this: J. Phys. Chem. 1992, 96, 25, 10150–10154Publication Date (Print):December 1…
The liquid wetting and retention properties of cotton, polyester, and their blends and other woven fabrics, each containing a single fiber type, were investigated using a previously established method. Several aspects of liquid retention properties of woven fabrics were discussed, i.e., distribution of liquid uptake,…