Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethane Oxidative Coupling: Technical and Economic Evaluation of a Chemical Cogenerative Fuel CellDouglas Eng, Po-Hung Chiang, and Michael StoukidesCite this: Energy Fuels 1995, 9, 5, 794–801Publication Date (Print):September 1, 1995Publication History Published online1 May…
Abstract This paper reviews three flexible PVC formulations using various types of alumina trihydrate (ATH) and magnesium hydroxide [Mg(OH) 2 ]. Smoke values are compared. In two of the formulations, Mg(OH) 2 has better smoke values than ATH; in a third formulation, ATH has better smoke values than Mg(OH) 2 . However,…
Abstract 3‐Methyl‐1,3‐pentadiene has been polymerized with the Al(C 2 H 5 ) 2 Cl/Nd(OCOC 7 H 15 ) 3 /Al[CH 2 CH(CH 3 ) 2 ] 3 system to crystalline polymers consisting essentially of cis‐1,4 units (≥80%). NMR examination has shown that the polymers have an isotactic structure. This conclusion was confirmed by X‐ray ana…
The Fr\'eedericksz transition is a nonuniaxial, nonchiral nematic liquid crystal (LC) in the presence of the electric E field is considered using the Curie symmetry principle. All possible symmetries of (i) the LC point symmetry group ${\mathit{G}}_{\mathit{N}}$, (ii) the strong boundary LC orientation at the infinite…
An approach to quantitative evaluation of surface plasmon resonance (SPR) measurements is given. In order to determine thicknesses and refractive indices, measured SPR curves were fitted numerically with a theoretical model based on the Fresnel equations. The model also takes into account additional roughness layers,…
The morphology of (0112) twins studied in Zn is described as well as interfacial defects. Twin boundaries are usually made up of three types of interface: straight parts parallel to the K1 (0112) composition plane, growing parts involving a series of geometrically well defined steps separated by (0112) boundary portio…
The influence of the microstructure and the grain boundary potential barrier layer on the electrical breakdown of barium titanate positive temperature coefficient (PTC) ceramics was studied. Samples of various grain sizes were prepared by adjusting the amount of Sb substitution into Ba sites in barium titanate PTC cer…
Article Erfahrungen mit der quantitativen Bestimmung der Versetzungsdichte im Transmissionselektronenmikroskop / The Quantitative Measurement of Dislocation Density in the Transmission Electron Microscope was published on September 1, 1995 in the journal Practical Metallography (volume 32, issue 9).
Abstract Silyl trifluoromethanesulfonates are inactive for the polymerization of cyclosiloxanes in the complete absence of trifluoromethanesulfonic (triflic) acid, but polymerization occurs in its presence. Using a triflic ester as tagged silyl triflate (benzyldimethylsilyl triflate) the degree of polymerization ( DP…
Abstract Forensic investigations have been using fiber scanning electron microscopy to identify the cause of textile damage. This study was modeled after previously documented cases with the aims to create fabric damage under a known series of conditions, to examine the fiber's fracture morphology, to photograph SEM f…
The electron distribution in the coenzyme-substrate adduct of aspartate aminotransferase was changed by replacing active-site Arg386 with alanine and introducing a new arginine residue nearby. [Y225R, R386A]Aspartate aminotransferase decarboxylates L-aspartate to L-alanine (kcat = 0.04 s-1), while its transaminase act…
Single crystals of sodium metaperrhenate, NaReO 4 , have been obtained by oxidation of rhenium metal with sodium nitrate under high pressure- high temperature conditions (modified Belttype apparatus, 4 kbar, 400 °C, Au-capsules). The crystals are tetragonal, space group I4 1 /a, with a = 5.3654(4), c = 11.732(2) Å and…
Measurements of free surface velocity profiles of high-purity titanium samples under shock-wave loading were performed to study the dynamic strength and phase transition parameters. The peak pressure of the initial compression waves was within the range of 4 to 40 GPa, and the load duration was vaned between 10−8 and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompound I and II Analogs of a ChlorinK. Jayaraj, A. Gold, R. N. Austin, D. Mandon, R. Weiss, J. Terner, E. Bill, M. Muether, and A. X. TrautweinCite this: J. Am. Chem. Soc. 1995, 117, 35, 9079–9080Publication Date (Print):September 1, 1995Publication History Published onlin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrostructure of Poly[(R,S)-.beta.-hydroxybutyrate] by 13C NMRPhilippa J. Hocking and Robert H. MarchessaultCite this: Macromolecules 1995, 28, 19, 6401–6409Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September…
The angular distributions of Cu particles sputtered from a cylindrical (post) magnetron were measured in a pinhole arrangement at various working gas pressures. The differentially pumped pinhole camera—described in a previous article—allows measurements in a pressure range up to 10 Pa and samples the three-dimensional…
Abstract The viscoelastic behavior of acrylonitrile‐butadiene‐styrene (ABS) terpolymers is studied in the molten state. First, the behavior of the styrene‐acrylonitrile (SAN) matrix is determined. Then, the effect of the degree of grafting on ABS rheological properties is emphasized. A critical degree of grafting (DGc…
Abstract A scanning electron microscope (SEM) can be used to measure the dimensions of the microlithographic features of integrated circuits. However, without a good model of the electron‐beam/specimen interaction, accurate edge location cannot be obtained. A Monte Carlo code has been developed to model the interactio…
Abstract Isotactic polypropylene (PP) with MFIs of 0.43 to 44.5 g/10 min were added with 0 to 10 ppm of γ-quinacridone, a β-crystal nucleator of PP. Flexural test specimens were injection-molded from the PPs at constant molding conditions and the structures and properties have been studied. 1) The crystallization temp…
Abstract The reversible interconversion of dihydroazulene (DHA) and vinylheptafulvene (VHF) can be utilized to switch a number of physical properties. This communication reports on a fluorescent switch. By a multistep sequence involving an [8 + 2] cycloaddition route 9‐anthracenyl‐1,4‐phenylene was covalently attached…