Materials Literature
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The effect of hydrostatic pressures on thermoelastic martensitic transformations in aged Ti-51at%Ni and ausaged Fe-31.9Ni-9.8Co-4.1Ti (at%) shape memory alloys has been investigated by electrical resistivity measurements under hydrostatic pressures up to 1.5 GPa. The results obtained were as follows: Transformation te…
Tensile deformation and heating experiments have been made in a high voltage electron microscope in order to clarify the mechanism controlling partial dislocation motion in a Fe–Mn–Si shape memory alloy. It is found that a small angle boundary composed of three types of perfect dislocations acts as a dislocation sourc…
In standard Mott electron polarimetry using thin gold film targets, extrapolation procedures must be used to reduce the experimentally measured asymmetries A to the values they would have for scattering from single atoms. These extrapolations involve the dependence of A on either the gold film thickness t or the maxim…
Incorporation of polymers, such as polyethylene glycol (PEG-lipid derivatives, or glycolipids, such as monosialoganglioside GM1; into liposomes results in sterically stabilized liposomes which have several advantages over liposome formulations traditionally used in the past, including reduced recognition and uptake by…
The performance of high-value-added synthetic-fiber products is greatly affected, not only by the properties of the polymer itself, but also by the fiber form and the structure of yarns and fabrics made from the fiber, which can be controlled for particular uses. This paper deals primarily with polyester-fiber fabrics…
Abstract The behaviour in propylene polymerization of catalysts containing ethyl benzoate/methyl p ‐toluate (EB/MPT) or dibutyl phthalate/triethoxy(phenyl)silane (DBP/EPS) as internal/external donor pairs was investigated. Comparing catalyst composition with performance, it appears that no qualitative difference exist…
Polyethylene oxide and polyethylene glycols can be inserted into MPS3 layered materials preintercalated with hydrated metallic cations.
The interaction of IrCl3(tht)3, tht = tetrahydrothiophene, and mesityl (2,4,6-trimethylphenyl, mes)-magnesium bromide in diethyl ether gives Ir(mes)3 as a very air-sensitive crystalline solid. Interaction of partially dehydrated IrCl3 with mesityllithium in Et2O gives the air-stable, paramagnetic Ir(mes)4. Interaction…
Several aluminas were synthesized from aluminium isopropoxide using some organic complexing agents as solvents. The difference in the properties, especially specific surface area, of the aluminas obtained was investigated. The thermal behaviour of the aluminas depended on the complexing abilities of the solvents used.…
Nickel oxide (NiOx) thin films have been prepared on transparent conducting indium tin oxide (ITO) substrates by anodic deposition from a nickel ammine complex solution. Electrochromic (EC) behaviour of these films was observed in a borate buffer solution at pH 10 in the potential range 0–1 V vs. Ag/AgCl; an as-prepar…
The reduction effect on CuCe oxide catalysts with an atomic ratio Cu : Ce = 0.01 has been studied mainly by EPR techniques. The surface species of copper(II) ion pairs and their precursors (Cu2+ ion monomers) were easily reducible by H2, C2H4 and CO. A bronze-like complex (HxCuCeO2) has been obtained before the beginn…
Various derivatives of the title complexes have been synthesized and demonstrated to form stable mesomorphic phases. They provide a new family of thermotropic liquid-crystalline complexes containing a carbon–metal σ-bond and a tertiary phosphine co-ordinated to a transition metal.
The water content of electrochemically deposited polyvinylferrocene films was studied using the electrochemical quartz crystal microbalance. Unhydrated films were introduced into aqueous sodium perchlorate solution. Using cyclic voltammetry, the mass and charge change accompanying electrochemical cycling between oxidi…
The adsorption isotherm and the enthalpy of adsorption of CO2 on oxides of oxygen-deficient magnetite have been studied by adsorption techniques. Oxygen-deficient magnetite was prepared by flowing H2 gas through magnetite powder at 300 °C. Adsorption of CO2 onto oxygen-deficient magnetite was studied in the temperatur…
The effects of phospholipid adsorption onto the polymer surface during adsorption of plasma proteins were investigated. When a polymer with the phosphorylcholine moiety, 2-methacryloyloxyethyl phosphorylcholine (MPC) co-polymer, was treated with dipalmitoylphosphatidylcholine (DPPC) liposome solution, an organized ads…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermotropic properties and conformational studies on poly(triethylene glycol p,p'-bibenzoate) and poly(octamethylene p,p'-bibenzoate)Ernesto Perez, Evaristo Riande, Antonio Bello, Rosario Benavente, and Jose M. PerenaCite this: Macromolecules 1992, 25, 2, 605–610Publication…
The thermally-stable coloured form 5a, obtained by irradiation (λ= 366 nm) of the title compound 4a, contains a rigid inflexible spiroadamantylidene group which results in a five- to nine-fold increase in the quantum efficiency for bleaching compared to the analogous compound 2 having methyl groups in the 7-position.…
All articles of this category The design and synthesis of a molecular shuttle, in which the two components are a cyclobis(paraquat- p -phenylene) tetracationic macrocycle and a linear polyether chain intercepted by a 2,3,5-trisubstituted indole unit and a hydroquinol residue, and terminated by two 4-tritylphenyl ether…
Using self-assembly strategies, catenanes consisting of zinc and free base porphyrins with hydroquinol-containing polyether straps of different lengths interlinked with a tetracationic bipyridinium cyclophane have been synthesised.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of phosphine ligands in gold cluster chemistry. Relativistic SCF calculations on Au2 and Au2(PH3)2Peter Schwerdtfeger and Peter D. W. BoydCite this: Inorg. Chem. 1992, 31, 2, 327–329Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Pu…