Ceramic coatings for carbon-carbon composites
Protection des composites carbone-carbone contre l'oxydation: revetements a base de SiC et de Si 3 N 4 , revetements resistants a plus de 1800°C
Materials Literature
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Polar host-guest interaction. Binding of nonionic polar compounds with a resorcinol-aldehyde cyclooligomer as a lipophilic polar host
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolar host-guest interaction. Binding of nonionic polar compounds with a resorcinol-aldehyde cyclooligomer as a lipophilic polar hostYasuhiro. Aoyama, Yasutaka. Tanaka, Hiroo. Toi, and Hisanobu. OgoshiCite this: J. Am. Chem. Soc. 1988, 110, 2, 634–635Publication Date (Print)…
Dynamics in spinodal decomposition of polymer mixtures
Un mixing kinetics and ordering processes of polymer mixtures quenched into thermo-dynamically unstable states are reviewed with particular emphasis on (i) universality in the polymer dynamics in comparison with the dynamics for other systems, such as small molecular fluid mixtures, metallic alloys and inorganic glass…
High-resolution electron-beam induced deposition
A finely focused electron beam is used as a source of energy to decompose molecules, e.g., organometallics or hydrocarbons, adsorbed on the surface of a substrate. Films deposited by these means can be used as etch mask for reactive ion etching, as an absorber for various types of radiation, or directly as part of a d…
Raman spectroscopy of low-dimensional semiconductors
Raman spectroscopy is widely used to study the vibrational and structural properties of single crystals. More recently, in the fields of chemistry, physics, and engineering, interest in the properties of small objects has arisen. Small objects include microcrystalline materials, artificially layered semiconductor stru…
Generation of photon energy deposition kernels using the EGS Monte Carlo code
The EGS Monte Carlo code was used to generate photon energy deposition kernels which describe the energy deposited by charged particles set in motion by primary, first scattered, second scattered, multiple scattered and bremsstrahlung plus annihilation photons. These were calculated for a water medium irradiated with…
On electrically driven pattern-forming instabilities in planar nematics
The theoretical description of the threshold and near-threshold behavior of electrohydrodynamic convection in nematic liquid crystals in the (low-frequency) conduction regime is reconsidered. We present essentially the full three-dimensional linear stability analysis of the basic state and a major part of the weakly-n…
In‐situ photopolymerization of an oriented liquid‐crystalline acrylate
Abstract The photoinitiated polymerization of 4‐biphenylyl 4‐(6‐acryloyloxyhexyloxy)benzoate ( 1 ) in its oriented liquid‐crystalline state was studied. Monomer 1 has a thermotropic nematic phase between 88°C and 98°C, a monotropic nematic phase between 76°C and 88°C, and a monotropic smectic phase below 76°C. The ori…
Liposomes as drug carriers : recent trends and progress
This book is about liposomes and their uses in drug delivery. Conventional use of drugs is marred by side effects due to indiscriminate drug action, inability of drugs to reach areas in need of pharmacological intervention and drug premature inactivation and secretion. Liposomes incorporating drugs can direct these to…
Surface and near-surface chemistry of oxide materials
1. The Theory of Ceramic Surfaces (A.M. Stoneham, P.W. Tasker). 2. Electronic and Geometric Structure of Defects on Oxides and their Role in Chemisorption (V.E. Henrich). 3. Selected Experimental Methods in the Characterization of Oxide Surfaces (H. Hirschwald). 4. Surface Reactivity of Oxide Materials in Oxidation-Re…
Polyaniline: Solutions, Films and Oxidation State
The emeraldine oxidation state of polyaniline in its base form, “emeraldine base” can be solution-processed to yield large flexible films which can be doped to the metallic conducting regime (σ ∼ 1-5 S/cm). The approximate solubility of emeraldine base at room temperature in 80% aqueous acetic acid, 60% and 88% aqueou…
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Elongational data on a large number of polyethy lene sam pies with different structures and their blends are presented in order to evaluate the influence of the molecular weight and molecular weight distribution for a given degree of long chain branching. The elongational viscosity rises with the number of branch poi…
An experimental 512-bit nonvolatile memory with ferroelectric storage cell
An experimental 512-b random-access memory based on ferroelectric-capacitor storage cells has been successfully fabricated and tested. The device was designed solely for use in process development and electrical characterization and includes onboard test circuitry for that purpose. The internal timing of the memory is…
Ultrastructure processing of advanced ceramics
Experimental investigations and applications of advanced ceramics are discussed in reviews and reports presented at the Third International Conference on Ultrastructure Processing of Ceramics, Glasses, and Composites held in San Diego in February 1987. Sections are devoted to precursors and chemistry for ultrastructur…
Synthesis of a novel amphiphilic porphyrin carrying water-soluble polyether side chains of controlled chain length. Formation of a cofacial molecular assembly in aqueous media
A novel amphiphilic porphyrin carrying poly(oxyethylene) side chains of controlled chain length was obtained by polymerization of epoxyethane initiated by an aluminium porphyrin [(5,10,15,20-tetraphenylporphyrinato)-aluminium chloride] in the presence of a porphyrin with phenolic substituents [5,10,15,20-tetrakis(4′-h…
Electroactive films of [Cu(dpp)2]+ covalently attached to polypyrrole (dpp = 2,9-diphenyl-1,10-phenanthroline)
A copper(I) complex containing two entwined dpp ligands (dpp = 2,9-diphenyl-1,10-phenanthroline), each covalently linked to a pyrrole sub-unit, has been synthesized; electropolymerization of the complex generates a conductive film on platinum or glassy carbon, which can be reversibly de- and re-metallated.
Energy Levels of Molybdenum, Mo I through Mo XLII
The energy levels of the molybdenum atom, in all stages of ionization for which experimental data are available, have been compiled. Ionization energies, either experimental or theoretical, and experimental g-factors are given. Leading components of calculated eigenvectors are listed.
The electrochemical doping reactions of the conducting ladder polymer benzimidazobenzophenanthroline (BBL)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe electrochemical doping reactions of the conducting ladder polymer benzimidazobenzophenanthroline (BBL)K. Wilbourn and Royce W. MurrayCite this: Macromolecules 1988, 21, 1, 89–96Publication Date (Print):January 1, 1988Publication History Published online1 May 2002Publishe…
Polymer welding relations investigated by a lap shear joint method
Abstract A lap shear joint method was used to study strength development during welding of polystyrene surfaces‐ The surfaces previously had not been in contact and care was taken to insure rapid wetting of the interface. The shear stress at failure, τ f was measured at room temperature as a function of contact time,…
Analysis of heteromorph ammonoids by differential geometry
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.