Materials Literature
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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…
Acceleration effect of the ternary carbonate of Li/Na/K on the CO2-absorption rate of lithium zirconate was studied. Potassium carbonate additive in lithium zirconate powder clearly produces the absorption-rate acceleration as a result of the formation of the binary carbonate of Li/K, which melts at around 500°C. The…
The CO oxidation with O2 on an active Au/Ti(OH)4* catalyst has been studied using a TAP (temporal analysis of products) transient technique to gain insights into the CO oxidation mechanism. Taking advantage of the TAP system, we have tried to elucidate the controversial mechanism proposed for the CO oxidation on suppo…
The antineoplastic agent paclitaxel (PTX), a microtubule-stabilizing agent, is known to arrest cell cycle progression and induce apoptosis. Mild hyperthermia (HT) also disrupts the microtubule system and triggers apoptosis. We therefore investigated whether concurrent exposure of murine breast cancer cells to 10 micro…
An immiscible polymer-clay nanocomposite has been synthesized consisting of dispersed layers of organically modified montmorillonite (OMOM) in a polybenzoxazine matrix as shown by thermogravimetry, wide angle x-ray diffraction (WAXD), and transmission electron microscopy. Five small protonated amines showed high ion-e…
The structure of pure TeO2 and alkali tellurite glasses has been examined by neutron diffraction and ab initio molecular orbital methods. The experimental radial distribution functions along with the calculated results have demonstrated that the basic structural units in tellurite glasses change from highly strained T…
This paper presents an experimental technique to measure the directional thermal conductivity and thermal diffusivity of materials. A heated thermistor heats the sample and a sensing thermistor placed about 2.5 mm away measures the temperature rise due the heating pulse at the heated thermistor. An empirical relation…
A method for synthesizing polyoxymethylene (POM) film at high deposition rates was achieved via hot filament chemical vapor deposition (HFCVD). Nuclear magnetic resonance spectra show that the structure of the polymer is linear, rather than cross-linked (which plasma enhanced CVD would have produced). The linear struc…
All articles of this category Our studies on synthesis of directly meso-meso -linked and fused porphyrin arrays were reviewed. Ag I -promoted meso-meso coupling reaction of 5,15-diaryl Zn II -porphyrins is advantageous in light of its high regioselectivity as well as its easy extension to large porphyrin arrays. Doubl…
The effect of galvanized corrosion steel sheets and zinc-rich primer coated steel sheets on the perforation corrosion of actual automobiles and the relevant corrosion mechanism was studied. Perforation occurred in 6-7 years for zinc-rich primer coated steel panels inside of door hems and after more than 14 years for g…
A series of iron porphyrins bearing one to eight beta-nitro substituents were synthesized and evalauted as catalysts for hydrocarbon oxidation with H2O2; iron porphyrins bearing five or six beta-nitro groups were the best catalysts for cyclooctene epoxidation and adamantane or anisole hydroxylation without need of a c…