Fabrication of Silicon Microstructures Based on Selective Formation and Etching of Porous Silicon
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Statistics of free-radical polymerizations revisited using a fragment approach. 1. Bifunctional monomers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStatistics of free-radical polymerizations revisited using a fragment approach. 1. Bifunctional monomersRoberto J. J. WilliamsCite this: Macromolecules 1988, 21, 8, 2568–2571Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published inissu…
Melt rheological properties of nickel powder filled polypropylene composites
Abstract The melt rheological properties of nickel powder filled polypropylene composites were investigated. The effect of filler concentration on shear stress‐shear rate data, melt viscosity and melt elasticity parameters were determined by using a capillary rheometer. The study shows that the materials follow a powe…
Inorganic Aspects of the Blood Chemistry of Ascidians. Ionic Composition, and Ti, V, and Fe in the Blood Plasma ofPyura chilensisandAscidia dispar
Iron, titanium, and vanadium analysis were performed on the tunicates Pyura chilensis Molina, 1782, and Ascidia dispar, and the inorganic chemistry of blood was investigated. The major ionic characterization of the blood plasma and cytosolic solutions were determined. Gel chromatography was used to secure information…
Absorption, fluorescence, and electron spin resonance investigation of tervalent cerium activated LaMgAl11O19
Single crystals of the magnetoplumbite (MP)-like compounds La1−xCex MgAl11O19 (0≤x≤1) have been grown from the melt by the flame fusion method. These crystals have been characterized by optical absorption and fluorescence which occur between 4f and 5d levels as well as by electron spin resonance at 20 K. For dilute sa…
Formation of singlet molecular oxygen (1.DELTA.gO2) in a solution-phase photosensitized reaction. 2. A comment on static quenching
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of singlet molecular oxygen (1.DELTA.gO2) in a solution-phase photosensitized reaction. 2. A comment on static quenchingKai Kong Iu and Peter R. OgilbyCite this: J. Phys. Chem. 1988, 92, 16, 4662–4666Publication Date (Print):August 1, 1988Publication History Publis…
Relationship between Plasma Parameters and Carbon Atom Coordination in a-C:H Films Prepared by RF Glow Discharge Decomposition
Amorphous C:H films were prepared by rf glow discharge decomposition from CH 4 using a permanent magnet system to apply a static magnetic field perpendicular to the rf electric field. The structure and properties of a-C:H films have been investigated systematically with respect to the hydrogen content, hardness and co…
Sensitization and photoredox reactions of zinc(II) and antimony(V) uroporphyrins in aqueous media
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSensitization and photoredox reactions of zinc(II) and antimony(V) uroporphyrins in aqueous mediaK. Kalyanasundaram, J. A. Shelnutt, and Michel GraetzelCite this: Inorg. Chem. 1988, 27, 16, 2820–2825Publication Date (Print):August 1, 1988Publication History Published online1…
Dynamical scaling, domain-growth kinetics, and domain-wall shapes of quenched two-dimensional anisotropicXYmodels
The domain-growth kinetics in two different anisotropic two-dimensional XY-spin models is studied by computer simulation. The models have uniaxial and cubic anisotropy which leads to ground-state orderings which are twofold and fourfold degenerate, respectively. The models are quenched from infinite to zero temperatur…
Stereochemical configuration of polyfumarates as studied by 13C nuclear magnetic resonance spectroscopy
Abstract The 125 MHz 13 C NMR spectra of some poly(dialkyl fumarates) (PDAF) and poly(dicycloalkyl fumarates) (PDCF) prepared by radical polymerization are measured in CDCl 3 solution at 60°C. The multiplet resonances of the main‐chain carbon atoms and the ester carbonyl carbon atoms are assigned to stereochemical tri…
Fourier transform far-infrared spectroscopic study of cation and anion dynamics in M,X sodalites, where M = lithium(1+), sodium(1+), potassium(1+), rubidium(1+), cadmium(2+); X = chloride, bromide, iodide, perchlorate, hydroxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFourier transform far-infrared spectroscopic study of cation and anion dynamics in M,X sodalites, where M = lithium(1+), sodium(1+), potassium(1+), rubidium(1+), cadmium(2+); X = chloride, bromide, iodide, perchlorate, hydroxideJohn Godber and Geoffrey A. OzinCite this: J. P…
Upper critical fields of periodic and quasiperiodic Nb-Ta superlattices
Upper critical fields have been studied for two series of Nb-Ta superlattices grown by molecular-beam epitaxy with both periodic and quasiperiodic (Fibonacci sequence) layering. X-ray results are presented to characterize the nature and quality of the layering. Positive curvature in the perpendicular upper critical fi…
An X-ray scattering study of the lamellar/nematic/isotropic sequence of phases in decylammonium chloride/H 2 O/NH 4 Cl
An X-ray scattering study is presented of the lamellar/nematic/isotropic sequence in the lyotropic system DACI/H2O/NH4Cl. The whole reciprocal space of monocrystalline samples oriented in magnetic fields are reconstructed from their two dimensional sections on photographic films. Intense diffuse scatterings are observ…
Thermal Surface Modification by Electron Beam High-Speed Scanning
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Influence of Cotton Fiber Strength and Fineness on Fiber Damage during Lint Cleaning
Seven sources of cotton representing a wide range of fiber properties were roller ginned, saw ginned, or saw ginned plus processed through tandem saw lint cleaners or through an aggressive carding-type cleaner (Cottonmaster 1 ). Lint cleaner induced changes in fiber length and nep count were compared to fiber property…
An EXAFS study of cobalt-manganese/silica bimetallic solvated metal atom dispersed (SMAD) catalysts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn EXAFS study of cobalt-manganese/silica bimetallic solvated metal atom dispersed (SMAD) catalystsBeng Jit. Tan, Kenneth J. Klabunde, Tsunehiro. Tanaka, Hiroyoshi. Kanai, and Satohiro. YoshidaCite this: J. Am. Chem. Soc. 1988, 110, 18, 5951–5958Publication Date (Print):Augu…
Effect of Chemical Treatment on Thermal Behavior of Jute Fibers
Two jute fibers, Corchorus capsularis grade 2 and Corchorus olitorius grade 2, were modified to reduce their moisture regain. The fibers were treated with reagents capable of reacting with hydroxyl groups of cellulose, for example, isopropyl triisostearoyl titanate, γ-aminopropyl trimethoxy silane, tolylene diisocyana…
Migration energy calculations for small vacancy clusters in copper
The migration energies of tri- and tetravacancies in copper are calculated to be 0.56 eV and 0.38 eV, respectively, using a new energy minimisation scheme and a first-principles interatomic potential. Comparison with the previously calculated single and divacancy migration energies of 0.82 and 0.55 eV, respectively, i…
A Convenient Synthesis of Fluorobenzaldehydes by KF/Ph4PBr/18-Crown-6 Reagent System
Abstract 4-Fluorobenzaldehyde was easily synthesized from 4-chlorobenzaldehyde by potassium fluoride in the presence of tetraphenylphosphonium halide plus 18-crown-6 or poly(ethylene glycol) dimethyl ether. Several fluorobenzaldehyde derivatives were similarly prepared from the corresponding chloro-derivatives in good…
Ligand field transitions and the origin of zero field splitting in [PPh4][FeCl4] and [NEt4][Fe(SR)4] (R = 2,3,5,6-Me4C6H): a model for the high-spin Fe(III) site in rubredoxin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand field transitions and the origin of zero field splitting in [PPh4][FeCl4] and [NEt4][Fe(SR)4] (R = 2,3,5,6-Me4C6H): a model for the high-spin Fe(III) site in rubredoxinJoseph C. Deaton, Matthew S. Gebhard, Stephen A. Koch, Michelle. Millar, and Edward I. SolomonCite t…