Materials Literature
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Three types of ternary selenides with layered composite crystal structures, (PbSe) 1.14 NbSe 2 [A], (PbSe) 1.14 (NbSe 2 ) 2 [B] and (PbSe) 1.14 (NbSe 2 ) 3 [C], have been prepared and characterized by powder X-ray diffraction, electron diffraction, intercalation and electric resistivity measurement. Results suggest th…
High-temperature single-crystal measurements of metamict zircon were performed up to 2000 K and the recrystallization was monitored using the width and intensity of selected peaks. Full data sets were collected at room temperature, 1573 and 1823 K. The changes in the probability density function (p.d.f.) of the O atom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContribution of physical blocking and electronic effect to establishment of strong metal-support interaction in rhodium/titanium dioxide catalystsJuan P. Belzunegui, Jesus Sanz, and Jose M. RojoCite this: J. Am. Chem. Soc. 1992, 114, 17, 6749–6754Publication Date (Print):Aug…
The properties of the interface between polystyrene (PS) and a random copolymer of polystyrene and poly(parahydroxystyrene) (PPHS) were modified by addition of a diblock copolymer of deuterated polystyrene (dPS) and poly(2-vinylpyridine) (PVP). Segregation of diblock copolymer chains to the interface between the immis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly[3-(4-octylphenyl)thiophene], a new processible conducting polymerQ. Pei, H. Jarvinen, J. E. Osterholm, O. Inganaes, and J. LaaksoCite this: Macromolecules 1992, 25, 17, 4297–4301Publication Date (Print):August 1, 1992Publication History Published online1 May 2002Publish…
Abstract NMR spectra of PF1-1 Floridan palygorskite strongly suggest that Al 3+ occurs only in octahedral coordination. X-ray microanalysis of the palygorskite fibers indicate a chemical composition defined by the atomic ratios: Mg/Si = 0.34, Al/Si = 0.27, and Fe/Si = 0.04. Considering the NMR and CEC data in this rep…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis- and tris(tetrathiafulvalenes) (TTFs) derived from reactions of the TTF-thiolate anionMartin R. Bryce, Gary J. Marshallsay, and Adrian J. MooreCite this: J. Org. Chem. 1992, 57, 18, 4859–4862Publication Date (Print):August 1, 1992Publication History Published online1 May…
Abstract X-ray diffraction patterns were obtained from rock fragments, < 1 μ m randomly oriented freeze-dried powders, and < 1 μ m oriented aggregates for 11 mixed-layered illite/smectite samples (K-bentonites) that cover the range from 14 to 100 percent expandable. In all cases, 00 l and hkl comparisons show no…
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 P. Valkó, M. J. Economides; Volume equalized constitutive equations for foamed polymer solutions.…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEquilibrium constants and the prediction of phase behavior for phenoxy blends with aliphatic polyestersMichael M. Coleman, Xiaoming Yang, Paul C. Painter, and John F. GrafCite this: Macromolecules 1992, 25, 17, 4414–4424Publication Date (Print):August 1, 1992Publication Hist…
We have made a systematic survey of the behavior of colloidal polystyrene latex spheres (PLS's) in critical mixtures of 2,6-lutidine plus water at temperatures where the liquid mixture separates into two immiscible phases. By varying the particle size, particle-surface charge density, and global PLS's concentration, w…
High-spatial-frequency, surface-relief binary gratings have been shown to have diffraction properties that are similar to homogeneous layers of equivalent refractive indices, which depend on the grating characteristics, angle of incidence, and polarization. Thus these gratings in the long-wavelength limit could be use…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-modulus polyethylene fiber structure as shown by x-ray diffractionDavid T. Grubb and Keshav PrasadCite this: Macromolecules 1992, 25, 18, 4575–4582Publication Date (Print):August 1, 1992Publication History Published online1 May 2002Published inissue 1 August 1992https:/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSub-picosecond .DELTA.S = 2 intersystem crossing in low-spin ferrous complexesJames K. McCusker, Kevin N. Walda, Robert C. Dunn, John D. Simon, Douglas Magde, and David N. HendricksonCite this: J. Am. Chem. Soc. 1992, 114, 17, 6919–6920Publication Date (Print):August 1, 1992…
Abstract The application of ultrasonic‐wave energy for the destruction of low concentrations of carbon tetrachloride into nonhazardous end products is described, and the results of experimental work are presented. Process parameters studied included steady‐state temperature, concentration, pH, irradiation time, and th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic-inorganic hybrid materials. 1. Hydrolysis and condensation mechanisms involved in alkoxysilane-terminated macromonomersFrancoise Surivet, Lam Thanh My, Jean Pierre Pascault, and Pham Quang ThoCite this: Macromolecules 1992, 25, 17, 4309–4320Publication Date (Print):A…
A literature review was performed to identify test methods that have been used to examine pitting susceptibility of stainless steels and nickel-base alloys in chloride (Cl–) containing environments. Several techniques were identified and a critical discussion of the electrochemical methods is provided with special att…
In Escherichia coli, p-aminobenzoate (PABA) is synthesized from chorismate and glutamine in two steps. Aminodeoxychorismate synthase components I and II, encoded by pabB and pabA, respectively, convert chorismate and glutamine to 4-amino-4-deoxychorismate (ADC) and glutamate, respectively. ADC lyase, encoded by pabC,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic behavior of nickel(II)-imino nitroxide derivativesDominique Luneau, Paul Rey, Jean Laugier, Elie Belorizky, and Andre CogneCite this: Inorg. Chem. 1992, 31, 17, 3578–3584Publication Date (Print):August 1, 1992Publication History Published online1 May 2002Publis…