Materials Literature
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The aim of this study was to analyze the microhardness of two resin-modified glass ionomer cements (Vitremer; Fuji II LC); two polyacid-modified composite resins (Freedom; F2000) and a hybrid composite resin (Prodigy), at different depths from the upper surface. Six hemi-cylinders (3 mm height; 3 mm radius) per tested…
Feasibility of designing composites from carbon nanotubes and nanodiamond clusters is discussed based on atomistic simulations. Depending on nanotube size and morphology, some types of open nanotubes can be chemically connected with different facets of diamond clusters. The geometrical relation between different types…
Doped ceria (CeO2) compounds are fluorite type oxides which show oxide ionic conductivity higher than yttria stabilized zirconia, in oxidizing atmosphere. As a consequence of this, considerable interest has been shown in application of these materials for 'low temperature operation (500–650 °C)' of solid oxide fuel ce…
Hydroxyapatite (HA) whiskers with uniform morphology and good crystallinity were successfully prepared by a precipitation-hydrolysis method in moderately acid solution at 85-95 °C for 48-120 h, their lengths were in the range of 50-150 mum and aspect ratios (length/diameter) in the range of 40-100. The precipitates fo…
As-quenched Fe90Zr7B3 alloy has been crystallized at 773, 923 and 973 K, it is found that the specimens annealed at 773 and 923 K have grains with the same size, but the one annealed at 773 K has a thick amorphous matrix and a broad grain size distribution. Big domains and smooth domain walls are observed in the speci…
A range of simple aromatic amines were used to modify Pt microcylinders with insulating electrosynthesised polymers generated amperometrically in the presence or absence of a typical globular protein, bovine serum albumin (BSA), at neutral pH. Sensitivity to a typical interference species, ascorbic acid (AA), and the…
An unique trinickel(II) complex has been synthesized and characterized using the novel triplesalen ligand H6talen which bridges three NiII-salen units in a meta-phenylene linkage.
The platinum diimine dithiolate complex, [Pt(2,2′-bipyridyl-5,5′-dicarboxylicacid)(3,4-toluenedithiolate)] ([Pt(5,5′-dcbpy)(tdt)]) and its tetrabutylammonium salt [TBA]2[Pt(5,5′-dcbpy)(tdt)] have been prepared, spectroscopically and electrochemically characterised and attached on to TiO2 substrate to be used as solar…
The phase evolution of yttrium oxide and lanthanum oxide doped zirconia (Y2O3–ZrO2 and La2O3–ZrO2, respectively) from their tetragonal to monoclinic phase has been studied using UV Raman spectroscopy, visible Raman spectroscopy and XRD. UV Raman spectroscopy is found to be more sensitive at the surface region while vi…
The influence of the pH at the electrode/solution interface on precipitation by means of electrochemistry was studied both theoretically and experimentally in pure calcocarbonic aqueous solutions. This interfacial pH was measured at the electrode by using a pH sensor-grid assembly in a submerged impinging cell. A mode…
Hot-melt extrusion technology (HME) was used to prepare muco-adhesive matrix films containing 10% w/w clotrimazole (CT) intended for local drug delivery applications for the oral cavity. This study was aimed at the production and characterization of these drug delivery systems for the prophylaxis and treatment of oral…
Pt nanoparticle-supported conducting nanotubules of polypyrrole prepared by a template method exhibited excellent catalytic activity and stability for the electrooxidation of methanol in comparison to Pt supported on conventionally synthesised conducting polypyrrole.
Ten homologues of a new class of asymmetric bent-shaped compounds have been synthesized. Their mesophase behaviour was investigated by polarizing microscopy, X-ray diffraction, dielectric and electro-optical measurements. The long-chain members of the series C8–C16 exhibit the switchable antiferroelectric SmCP phase.…
carbon composites were prepared from a homogeneous suspension in which vanadium pentoxide sol and acetylene black powder were mixed with acetone acting as a surfactant. The composite was loaded on indium-tin oxide (ITO)-coated glass, and then the magnesium intercalation property and the high-rate charge-discharge perf…
Roger Davey gives his personal view on why crystallization and crystal chemistry have become red-hot topics and on the big scientific and technical issues facing the area.
The application of the pulse-radiolysis time-resolved microwave conductivity technique, "PR-TRMC", to the determination of intracolumnar charge carrier mobilities within mesomorphic discotic materials is described. A review is given of the mobility values obtained for the large variety of materials which have been stu…
The corrosive behavior of Ti and its alloys in fluoride media is well known. Based on electrochemical studies, this paper describes the effect of fluoride ions on the passive behavior of Ti6Al4V alloy in lactated Ringer's serum. The open circuit potential of the alloy in the serum, which lies in the passive region of…
An experimental investigation is performed of the crystal structure and magnetic and electrical properties of anion-deficient compositions of La 1− 3+ Ba x 2+ Mn3+O 3− 2/2− (0≤x≤0.30) which do not contain manganese ions of different vacancies. It is found that all reduced samples are single-phase perovskites with O-or…
A family of aluminium complexes supported by dianionic amine bis(phenolate) ligands are described. Treatment of ligand precursors H2O2NNPy or H2O2NNMe [H2O2NNPy = (2-C5H4N)CH2N(CH2-2-HO-3,5-C6H2(tBu)2)2; H2O2NNMe = Me2NCH2CH2N(CH2-2-HO-3,5-C6H2(tBu)2)2] with 1.1 molar equivalent of AlMe3 in toluene affords MeAl(O2NNPy…
Water-vapor sorption isotherms, relative humidity (RH) controlled powder X-ray diffraction (XRD) data, and new and previously published multi-nuclear NMR spectroscopic data for a wide range of layered double hydroxides (LDHs) provide greatly increased understanding of the effects of hydration state on the structure an…