Materials Literature
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Coffee residues from instant coffee plants were used to produce mesoporous activated carbon. A series of carbonization and activation conditions were examined to elucidate the effect of each condition. The specific surface area, mesopore and total pore volumes were evaluated by nitrogen adsorption at 77 K, and the sur…
Oxidative addition of the disulfide compounds naphtho[1,8-cd][1,2]dithiole, 2-tert-butylnaptho[1,8-cd][1,2]dithiole, 2,7-di-tert-butylnaphtho[1,8-cd][1,2]dithiole, 4,5-dithiaacephenanthrylene and the thio/sulfinyl and thio/sulfonyl compounds naphtho[1,8-cd][1,2]dithiole 1-oxide, and naphtho[1,8-cd][1,2]dithiole 1,1-di…
An efficient stepwise template approach has been developed that leads to a novel Ni(II) complex of an unsymmetrical 1∶1∶1 Schiff base derived from o-phenylenediamine, benzoylacetone and salicylic aldehyde [abbreviated as salophbac Ni(II)]. The 3- and 5-hydroxysubstituted salicylic aldehydes lead to complexes containin…
The synthesis and mesomorphic properties of unsymmetrical five-ring bent-core compounds containing a fluorine substituent in one of the arms are reported. A comparison of the properties with the symmetrical compounds having two fluorine substituents indicates that the position of this substituent has an influence on t…
The effects of graded concentrations of Pt, Pd, and Rh salts on spontaneous and PHA-stimulated peripheral blood mononuclear cell (PBMC) proliferation and IFN-gamma, TNF-alpha, and IL-5 release were the focus of this study. Spontaneous PBMC proliferation was inhibited by all 10(-4) M salts (with the exception of PtCl2)…
The optical properties of the oxide compounds PbO and SnO 2 have been investigated experimentally by transmission spectroscopy measurements and theoretically by a full-potential linearized augmented plane wave (FPLAPW) method. The dielectric functions of the rutile TiO 2 has also been calculated. The calculated band-g…
Abstract The dinuclear copper( II ) complexes {[Cu 2 (1,3‐tpbd)(H 2 O)(OAc) 2 ](ClO 4 ) 2 } 0.23 {[Cu 2 (1,3‐tpbd)(H 2 O) 2 (OAc)](ClO 4 ) 3 } 0.77 ·0.77H 2 O ( 1 ), [Cu 2 (1,3‐tpbd)(H 2 O) 2 (OAc) 2 ](ClO 4 ) 2 ·2H 2 O ( 2 ), and the tetranuclear copper( II ) complex [Cu 4 (1,3‐tpbd) 2 (H 2 O) 2 (SO 4 ) 4 ]·8H 2 O (…
To improve the blood compatibility, the surface of polydimethylsiloxane (PDMS) films were irradiated using a CO2-pulsed laser. Acrylamide (AAm) was grafted onto a pre-irradiated surface. The AAm-grafted and laser-treated films were characterized using different techniques. Platelet adhesion and activation onto the AAm…
The superplastic behavior of fine-grained metals is well described by the deformation model in which grain boundary sliding (GBS) is accommodated by slip. This slip accommodation process involves the sequential steps of glide and climb, with climb assumed to be the rate-controlling process. The climb distance during G…
OBJECTIVES: The aim of this study was to compare the electrochemical behaviour of two materials used in oral implantology. METHODS: The resistance to corrosion of Ti grade 2 and the alloy Ti-6Al-4V was studied in an artificial saliva solution. It has been observed that the passivation of titanium by an oxidised layer…
The dynamics of a soft sphere model glass, studied by molecular dynamics, is investigated. The vibrational density of states divided by omega(2) shows a pronounced boson peak. Its shape is in agreement with the universal form derived for soft oscillators interacting with sound waves. The excess vibrations forming the…
Molecular dynamic simulations were carried out for carbosilane dendrimers of the 5th generation immersed in CCl4 solvent at different temperatures. The calculations were accomplished by using the AMBER force field in the united atom approximation. Lennard-Jones particles were considered as the solvent molecules with p…
thereby lowering insulation performance, so that these space charges must be suppressed at the design stage, in terms of the performance characteristics for XLPE insulation material under DC voltage. The following dielectric breakdown characteristics are inherent to DC voltage: • heat generated due to current in the i…
Aqueous peroxotungstates have been studied from pH 0.5 to 9.0, over a range of peroxide concentrations. Although equilibria are not always established, many anions can be identified by 17O NMR because the ratio of deltaO(W anion)/deltaO(known Mo anion) is consistently 79 +/- 3%. They are [WO3(HO2)]-; [WO(OH)(O2)2]-; […
A study has been conducted to examine the effect of a vigorous alkaline scour–bleaching preparation, followed by high temperature dyeing, reduction clearing and a reactive dyeing process on the physical strength of the Ingeo fibre component of an Ingeo fibre/cotton blend. The results indicate that the physical strengt…
The preparation of individual polyacetylene nanofibres has allowed a more probing investigation of the properties of polyacetylene. A significant discovery is that at low temperatures, polyacetylene nanofibres show temperature-independent Zener-type tunnelling, that we suggest is tunnelling of the conjugated-bond patt…
Abstract The flammability of eight halogen‐free styrene resins and one halogen‐containing styrene resin was characterized by UL 94 VB, LOI and cone calorimeter tests. Their burning behaviour was also measured when exposed to three external ignition sources (methenamine tablet, candle, paper ball). Five resins were use…
Abstract Summary: A library of 148 cathodic electrodeposition paints was synthesized and the properties of related amperometric glucose biosensors were evaluated. For this a novel automatic electrochemical robotic system was designed. The automatic biosensor fabrication and characterization sequence involves the elect…
Electrochemical current-potential and impedance measurement techniques have been applied to a ceramic anode based on the mixed electronic and oxide ion conductor Sc 0.15 Y 0.05 Zr 0.62 Ti 0.18 O 1.9 (ScYZT). Significantly better performance is obtained with this anode using a platinum current collector than for platin…
A hexagonal array of optically active ZnO nanoparticles was synthesized in situ on the solid substrate by utilizing a single-layered film of diblock copolymer micelles as a nanostructured template.