Materials Literature
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Structural Steels with higher strength are recently required. Therefore, environmental degradation by hydrogen, delayed fracture, should be afraid. Absorbed hydrogen contents in structural steels have been investigated by thermal hydrogen analysis. Hydrogen entry into steel has been directly measured by electrochemica…
Abstract Rubber compounds are reinforced with fillers such as carbon black and silica. In general, filled rubber compounds show smooth rheological behaviour in measurement of Mooney viscosity or Mooney scorch time. Variation in rheological behaviour was studied in terms of the filler composition using natural rubber c…
A new method for disruption of Gram-negative bacterium Ralstonia eutropha by supercritical CO(2) for poly(beta-hydroxybutyrate) (PHB) recovery is proposed. The effects of different parameters such as exposure time, pressure, temperature, volume of methanol as a modifier, and culture history on cell disruption efficien…
The first near-infrared photoluminescent liquid-crystalline material has been made by doping the nematic liquid-crystalline matrix MBBA with the lanthanide(III) β-diketonate complexes [Nd(dbm)3(phen)], [Er(dbm)3(phen)] and [Yb(dbm)3(phen)], respectively. The photoluminescence intensity of the ytterbium(III) sample inc…
In low and intermediate temperature solid oxide fuel cell (SOFC) stacks, ferritic stainless steels are among the most promising materials to construct the interconnect, which is simultaneously exposed to a fuel on the anode side and an oxidant on the cathode side. However, the corrosion behavior of stainless steels un…
Solid Lipid Nanoparticles (SLN) are already under investigation as a pharmaceutical tool able to change the pharmacokinetic and biodistribution of carried molecules. SLN are able to target drugs to lymph after duodenal administration and to overcome the Blood Brain Barrier (BBB). In this study, superparamagnetic SLN h…
A brief review is presented of a novel method of high-frequency magnetic resonance spectroscopy, which sweeps the frequency at a fixed magnetic field, including zero field. We describe the main features of this frequency-domain spectrometer which works in the spectral range from 30 GHz to 1.5 THz and at magnetic field…
The isomorphous insertion of 1–2 wt% of Ti into the MFI framework leads to a Titanium silicalite-1 (TS-1) material, which is an active and highly selective catalyst in a remarkable number of low-temperature oxidation reactions with aqueous H2O2 as oxidant. Such Ti(IV) species exhibit a local Td-like symmetry, forming…
A terpyridine ligand is covalently linked to a hexamolybdate cluster through the Mo-N imido bond, paving the way for the preparation of hybrids containing covalently bonded transition metal complexes and polyoxometalate clusters.
A new bisurea gelator derived from 2,6-diaminopyridine has been developed. It efficiently gelates common organic and liquid crystalline (LC) solvents by forming elongated self-assembled fibres in solvents. X-Ray crystallography and 1H NMR measurements reveal that two urea groups in pyridine-based bisurea compounds for…
The substitutional range and cell parameter evolution of fast oxide-ion conductors La2−xRxMo2−yWyO9 (R = Nd, Gd) are investigated. In the whole series, the cubic β-La2Mo2O9 structural type is stabilized at room temperature. The effects on reducibility of both single and double substitutions are presented. Lanthanum su…
The hydrothermal reaction of MoO3, [Ni(CH3CO2)2] x 4H2O, tpypyz, ethylenediphosphonic acid and water yields the 2D material [[Ni4(tpypyz)3][Mo5O15(O3PCH2CH2PO3)]2] x 23H2O (1 x 23H2O), constructed from [Mo5O15(O3PCH2CH2PO3)]4- clusters linked in one-dimension through the ethylene tethers of the diphosphonate component…
α-Al2O3 Nanobelts and nanosheets with different morphologies and sizes have been successfully synthesized by a simple chemical route from H2O and Al in an argon atmosphere. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations show that the as-synthesized α-Al2O3 nanostructures con…
A chemical approach to high surface area titanium nitride based materials is presented using a ligand-assisted ammonolysis reaction of solid TiCl4 complexes at 973 K. The specific surface area of the materials ranges from 37 to 230 m2 g−1 depending on the solid precursor and is higher as compared with conventional gas…
We investigate how the normal energy transport is realized in one-dimensional quantum systems using a quantum spin system. The direct investigation of local energy distribution under thermal gradient is made using the quantum master equation, and the mixing properties and the convergence of the Green-Kubo formula are…
Photochromic researches on spiropyrans, spirooxazines, naphthopyrans, chalcones, diarylethenes, and fulgides published in 2002 have been reviewed. Photochromic compounds are classified into two categories, thermally reversible compounds such as spiropyrans, spirooxazine, naphthopyrans, and chalcones, and thermally irr…
Rate of hydrogen permeation was measured under static as well as dynamic mechanical deformation conditions. Cylindrical tensile test specimens were used for the study and hydrogen permeation was measured electrochemically. It was observed that the hydrogen diffusivity decreased as plastic deformation increased for the…
Various π-conjugated polymers have been obtained by using organometallic polycondensations mediated by organotransition metal complexes. For example, Ni(0) complex-promoted dehalogenation polycondensation of dihaloaromatic compounds X-Ar-X affords poly(arylene)s, -(-Ar-)-n. Pd-catalyzed polycondensation gives poly(ary…
Oxidative thermal degradation of organically modified montmorillonite (OM) and muscovite was studied using conventional and high-resolution TGA. Analysis of the ultra thin alkylammonium film covering the mineral surface revealed a correlation between thermal stability and extent of cation exchange. In the final stage…
Au–Ag and Au–Cu nanoparticles of various compositions were synthesized in chloroform and their physical properties were characterized by employing various techniques such as UV-Visible spectroscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The synthesized alloy nanoparticles of diameter c…