Materials Literature
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Large power transformers belong to a class of vital and very expensive components in electric power systems. Accordingly, high demands are imposed on power transformer protective relays. The operating conditions of transformer protection, however, do not make the relaying task easy. Protection of large power transform…
Synthetic organic chemistry normally achieves selectivity by manipulation of the intrinsic reactivity of the substrate, but enzyme use is quite a different principle. The geometry of the enzyme-substrate complex determines enzymatic selectivity, completely overwhelming any normal selective reactivities. Biomimetic che…
The NLO properties of a series of vinylenephenylene complexes with a pendant ferrocene and an end-capping pyridine have been evaluated by the HRS method. The NLO responses (β) are clearly dependent on both the nature of the electron-accepting fragment and the length of the conjugated chain. As seen in some previous wo…
Using glancing angle deposition and templating techniques, we fabricated a number of thin films with unique perforation geometries. Template thin films consisting of columns having the negative of the desired pore shape ( i.e. , arrays of isolated helices or chevrons) were first deposited by glancing angle deposition.…
The secondary arm spacing in Fe–C, Fe–P, Fe–C–P and Al–Cu alloys are numerically predicted using a phase-field model. The calculated arm spacing and the exponent of the local solidification time are compared with the experimental data. Each calculated exponent differs depending on Fe-base or Al-base alloys. The change…
A β-cyclodextrin substituted with amino and carboxymethyl groups on the primary and secondary side respectively, has a positively charged primary face and a negatively charged secondary face at neutral pH, and self-assembles in water into supramolecular tapes that are 50–300 nanometres wide and up to 20 micrometres lo…
The purpose of this study was to reveal the effectiveness of the polymer coated liposomes as a carrier of the anticancer drug doxorubicin in intravenous administration. The size controlled doxorubicin-loaded liposomes (egg phosphatidylcholine : cholesterol = 1:1 in molar ratio) were coated with hydrophilic polymers (p…
Oxygen plasma resistance of low-k organosilica glasses (OSGs) is shown to be strongly dependent on the material structure: a silicon oxycarbide has a higher oxygen plasma resistance compared to a conventional OSG. The silicon oxycarbide is stable at pressures up to 300 mTorr, which is 10 times higher than those of the…
Surface characterization of Al2O3, In2O3–Al2O3 and Ga2O3–Al2O3 prepared by sol–gel method was made focusing on the acid–base properties. Cyclohexanol conversion as a model reaction revealed that acid sites rather than basic sites are present predominantly on the surface. The presence of Lewis acid sites was confirmed…
Recent demonstrations of direct utilization of hydrocarbon fuels have stimulated an automotive interest in solid oxide fuel cells for reformerless auxiliary power units with high power density, high chemical-to-electrical efficiency, and low exhaust emissions. Furthermore, recent designs with small-diameter oxide tube…
A series of difluoro substituted benzoate derivatives: (R)-1-methylheptyl 4-[4-(3-fluoro4-alkyloxybenzoyloxy)-3-fluorobenzoyloxy]benzoates is reported. The short chain members (n = 8 to 10) display a very rich polymesomorphic sequence with anticlinic properties: Cr-SmCA*-SmC*FI-SmC*-SmC*α-SmA-I; the longer chain membe…
Characteristics of open die forging in an AZ31 Mg alloy and a relation between microstructure and mechanical properties of the forged alloy have been investigated for an as-received specimen and an extruded specimen, where the as-received specimen consisted of both elongated coarse grains and equiaxed small grains, an…
Crystallization behavior of BaO-Ln2O3-TeO2 glasses (Ln=La, Pr, Sm, Eu, Er) was examined to prepare transparent crystallized glasses consisting of lanthanide tellurite crystals (Te4+ crystalline compounds) with low phonon energies. Transparent crystallized glasses with fluorite-type Ln2Te6O15 or Ln2Te5O13 nanocrystals…
Ormosils (organically modified silicates) were prepared by the sol–gel process through the incorporation of non-ionic surfactants in the starting solution. Oxazine 1 was used as the fluorescent probe for the achievement of this study. Thus, recording of the absorption and emission fluorescence spectra, as well as meas…
Autogenous veins are the materials of choice for arterial reconstruction. In the absence of autogenous material, prosthetic materials are used. However, vascular prostheses of less than 0.4 cm in diameter have low long-term patency. This study was designed to determine if cells would infiltrate an engineered xenogenei…
Poly(methyl acrylate)-starch graft copolymer was treated with sodium hydroxide. The influence of sodium hydroxide concentration, reaction temperature and duration of treatment were studied. The extent of hydrolysis was assessed by estimating acrylic acid, methyl acrylate and total polymer content before and after trea…
To improve the adhesion between copper metal and Kapton film, cyano and amino groups were introduced onto Kapton film surfaces by a combination of argon plasma treatment and coupling reactions. 3-Aminopropyltrimethoxysilane (APS-1), 3-aminopropyltriethoxysilane (APS-2), 2-cyanoethyltriethoxysilane (CES), and 3-cyanopr…
New nickel(II) bisoxocorrole complexes have been synthesized and characterized. Two nickel bisoxocorrole isomer complexes are formed in a 1:1 ratio when a biscorrole, where an anthracenyl bridge links the two macrocycles in a face to face arrangement, is metallated by nickel in air. Evidence for the insertion of an ox…
Temperature dependencies of the 1H NMR spectra of asymmetric double-decker complexes of DyH(oep)(tpp) (I) and LuH(oep)(tpp) (II), where tpp is tetraphenylporphyrin and oep is octaethylporphyrin, have been analyzed. The kinetic and thermodynamic parameters for intramolecular phenyl ring rotations have been determined.…
This review covers international research on the fabrication, microstructure, properties and applications of glass and glass-ceramic matrix composites reinforced with continuous fibres. The most important research work reported in the scientific literature since the discovery of these composites in the late 60s is rev…