Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-Temperature Single-Crystal X-ray Diffraction Studies of Potassium and (Cesium, Potassium) Titanyl ArsenatesPaul A. Northrup, John B. Parise, L. K. Cheng, L. T. Cheng, and E. M. McCarronCite this: Chem. Mater. 1994, 6, 4, 434–440Publication Date (Print):April 1, 1994Publ…
Abstract Pseudomonas oleovorans was grown separately on the methyl, ethyl and tert ‐butyl esters of octanoic, nonanoic and decanoic acid in attempts to obtain poly(β‐hydroxyalkanoates), PHAs, with ester groups at the terminal position of the β‐substituent. The growth rate increased from methyl to tert ‐butyl esters, b…
Abstract Tri- and dibromination of methyl-, dimethyl-, and trimethylbenzenes with N-bromosuccinimide were accomplished by photothermal reaction with a tungsten lamp in carbon tetrachloride or benzene. (Dibromomethyl)arenes and (tribromomethyl) derivatives were produced depending upon a solvent used and a substituent o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence Spectroscopy of Europium(III) Nitrate, Chloride, and Perchlorate in Mixed Ethanol-Water SolutionsM. J. Lochhead, P. R. Wamsley, and K. L. BrayCite this: Inorg. Chem. 1994, 33, 9, 2000–2003Publication Date (Print):April 1, 1994Publication History Published online…
Novel functional biodegradable polyesters and polycarbonates have been prepared by copolymerization of either succinic anhydride or carbon dioxide with the glycidyl ethers of protected alditols, such as glycidylisopropyl ideneglycerol and glycidyldiisopropylidenepentitols, and their mixtures with propylene oxide in th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural characterization of 1,3-cyclodisiloxanesHonglae Sohn, Robin P. Tan, Douglas R. Powell, and Robert WestCite this: Organometallics 1994, 13, 4, 1390–1394Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 199…
Obtaining high quality diamond depositions on cemented carbides is hindered by the presence of cobalt. This study deals with the movement of cobalt and its interaction with diamond crystals. The deposition was carried out using a hot-filament chemical vapour deposition method and a CH 4 -H 2 1% gas mixture. Diamond-gr…
Influence of surface charging on creepage discharge propagation in air and SF/sub 6/ gas was investigated. The authors have employed a surface charging system using corona discharges, which permitted the deposition of surface charge on solid dielectrics with a given density distribution. By applying a lightning impuls…
Abstract In this paper, we model the elastic modulus of in ‐ situ composite fibers from polymer blends where a fibrous liquid crystalline polymer (LCP) phase is induced by drawing. We propose a composite model to account for the change of the elastic moduli of the reinforcing LCP phase with the draw ratio of the compo…
We consider field distributions in fractional Talbot planes behind a periodic two-dimensional complex-amplitude transparency that is illuminated by a unit-amplitude plane wave. In the paraxial approximation the field in various fractional Talbot planes is expressed as a sum of contributions from a finite number of poi…
In this study transmission infrared spectra were recorded for 15 uranium oxides previously characterized by X-ray diffraction. The infrared spectra obtained demonstrated that all the uranium oxides studied could be distinguished, even for the closely similar structures of UO 2 and U 4 O 9 . The infrared studies of U 4…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinitiated Graft Poly(organophosphazenes): Functionalized Immobilization Substrates for the Binding of Amines, Proteins, and MetalsHarry R. Allcock, Constance J. Nelson, and William D. CoggioCite this: Chem. Mater. 1994, 6, 4, 516–524Publication Date (Print):April 1, 199…
The cysB gene of Klebsiella aerogenes has been cloned, sequenced and shown to complement the cysteine auxotrophic phenotype of Escherichia coli cysB mutants. The K. aerogenes cysB gene is predicted to encode a protein of 324 amino acid residues that shares approx. 95% sequence similarity with the Salmonella typhimuriu…
We have studied the influence of fabric structure on the stick-slip motion of dynamic frictional force. Autospectral density function analysis demonstrates that the nature of stick-slip motion is periodic and depends on fabric construction. Warp, weft density, and yam irregularity affect stick-slip data and can be obj…
Electrochemical anodization of graphite in trifluoroacetic media, when performed with a sufficiently high current density, leads to exfoliation of graphite. This reaction has been studied using X-ray diffractometry, A.C Impedance Spectroscopy and gas analysis in various experimental conditions. A mechanism is proposed…
Abstract The accessibility of cellulose samples with different supermolecular structure during deuteration has been studied by NMR. It has been established that the content of accessible regions is higher than the content of amorphous regions determined by the X‐ray method. A modified crystalline–amorphous model of ce…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing-Opening Polymerization of Octamethyltetrasila-1,4-dioxane, 2D2. 2. Cyclic Oligomer Formation and Mechanism of the ReactionJulian Chojnowski and Jan KurjataCite this: Macromolecules 1994, 27, 8, 2302–2309Publication Date (Print):April 1, 1994Publication History Published…
Abstract The structure of β -Si 3 N 4 was reinvestigated with X-ray powder diffraction and Rietveld refinement to determine if the space group should be centrosymmetric, P 6 3 / m , or acentric, P 6 3 . Displacement for one sort of the nitrogen atoms N(1) away from the high-symmetry positions are found to be even larg…
The grafting of CrC4 2- and Cr2O7 2- oxometalates has been evidenced on [Cu-Cr] layered double hydroxides by a PXRD study under moderate heating and by Infrared spectroscopy.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPalladium Complexes with the Tridentate Dianionic Ligand Pyridine-2,6-bis(thiocarboxylate), pdtc. Crystal Structure of (n-Bu4N)[Pd(pdtc)Br]Pablo Espinet, Cristina Lorenzo, Jesus A. Miguel, Claudette Bois, and Yves JeanninCite this: Inorg. Chem. 1994, 33, 9, 2052–2055Publicat…