Materials Literature
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Sandvik Bioline High‐N and 316 LVM are two austenitic stainless steels especially developed for biomaterial applications. Their resistance to localized corrosion was investigated by electrochemical methods including cyclic potentiodynamic polarization and potentiostatic polarization measurements in a phosphate‐buffere…
A novel family of photochromic amorphous molecular materials based on dithienylethene, 1-(5-{4-[bis(4-methylphenyl)amino]phenyl}-2-methylthiophen-3-yl)-2-(2-methylbenzo[b]thiophen-3-yl)-3,3,4,4,5,5-hexafluorocyclopentene (1o) and 1,2-bis(5-{4-[bis(4-methylphenyl)amino]phenyl}-2-methylthiophen-3-yl)-3,3,4,4,5,5-hexaflu…
Integral membrane proteins carry out some of the most important functions of living cells, yet relatively few details are known about their structures. This is due, in large part, to the difficulties associated with preparing membrane protein crystals suitable for X-ray diffraction analysis. Mechanistic studies of mem…
Electrochemical copolymerization of diphenylamine (DPA) with aniline (ANI) has been carried out in aqueous sulfuric acid medium using a pulse potentiostic method (PPSM). The polymeric films were electrodeposited by employing different tunable parameters like pulse width ( P w ) , pulse number ( P n ) etc., and the fil…
The detection of specific sequences of DNA bases in a single strand can be achieved by hybridization of a known sequence of synthetic DNA. Due to the low concentrations usually used, a fluorescent label is required to detect the probe. Surface enhanced resonance Raman scattering (SERRS) also has the required sensitivi…
The effect of surface chemistry on the proliferation and adhesion of SV-40 human corneal epithelial cells was investigated. The surface chemistry of substrates was controlled by the deposition of self-assembled monolayers (SAMs) terminated with the following functional groups: -CF3, -CH3, -CO(2)H, and -NH(2). SAMs of…
This paper describes a new amorphous wide-band gap semiconductor with photoluminescence (PL) at room temperature. The amorphous PbTiO3 was prepared by a sol–gel-like process in powder and thin film form. The optical property and the PL behaviour showed a direct relation to the amorphous structure. The PL peak energy c…
The ternary compound Ti3SiC2 possesses an unusual combination of metallic and ceramic properties, such as, high electrical conductivity, good oxidation resistance and remarkable refractoriness. Stoichiometric mixtures of the elemental Ti, Si and C powders were heated under various conditions and the reactions among th…
Reactions of 2,6-diphenylphenol (HOdpp) and rare earth metals, in the presence of mercury, at elevated temperatures in sealed tubes followed by extraction with toluene yielded homoleptic tris(aryloxo)lanthanoid(III) complexes, [Ln(Odpp)3] (Ln = Y (1), La (2), Ce (3), Pr (4), Nd (5), Gd (6), Ho (7), Er (8), Lu (9)). Si…
Metal capped carbon nanotubes, prepared by catalytic decomposition of benzene, have been applied as a magnetic force microscope tip. The particles at the end of nanotubes were about 35 nm in diameter, which were found to be Ni3C from the electron diffraction pattern. The other end of the nanotubes was attached on the…
In acetone and at ambient temperature, the dinuclear manganese complex of TPTN is able to catalyse the oxidation of several alkenes to the corresponding epoxides with high turnovers numbers (up to 900) using H2O2 as oxidant.
Polyaniline–emeraldine base (EB) fiber with excellent mechanical and electrical properties have been spun from highly concentrated (20% w/w), EB/N-methyl-2-pyrrolidinone (NMP)/2-methylaziridine (2 MA) solution. These solutions had gelation times, which varied from hours to days depending on the molar ratio of 2 MA to…
We report detailed measurements of the interlayer magnetoresistance of the layered organic superconductor $\ensuremath{\kappa}--(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}\mathrm{Cu}(\mathrm{SCN}{)}_{2}$ for temperatures down to 0.5 K and fields up to 30 T. The upper critical field is determined from the resistive…
The response of archaea to changes in external NaCl is reviewed and compared to what is known about osmoadaptation and osmoregulation in bacteria and eukaryotes. Cells placed in altered external NaCl exhibit short term and long term responses. The earliest events are likely to be water movement through aquaporin-like…
The paper presents recent work on ferromagnetic NiMnGa films sputter deposited on silicon cantilever substrates. The films are partially crystalline if the substrate is held at room temperature (RT) during the deposition. They become fully crystalline after annealing at 400°C. The internal friction (IF) of the RT depo…
The synthesis, X-ray crystal structures and magnetic properties of the 1-D polymeric coordination compound MnII(NITpPy)4[N(CN)2]2 (NITpPy = 2-(4-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide) are reported. In the crystal structure the [MnII(NITpPy)2]2+ units are linked by N(CN)2− μ-bridging ligands to form on…
Recent works on perpendicular recording media were reviewed, Co-Cr alloy films are still under improvment and show a recording ability of 20 Gbit/in/sup 2/ and beyond. New perpendicular recording media that have high perpendicular anisotropy have been developed. These would be candidate media for ultrahigh density rec…
In crystals of [FeII(N3)2(pyz)]n (pyz = pyrazine), two adjacent Fe2+ ions are bridged via two μ-1,1-N3− ligands along the c axis to afford ferromagnetically coupled linear chains, which are bridged via μ-pyrazine ligands along the b axis to afford 2-D antiferromagnetically coupled layers; these competitive magnetic co…
Mesostructured films deposited on glass substrates by spin coating are studied by X-ray diffraction, small angle X-ray scattering using grazing incidence (GISAXS) and high resolution electron microscopy. The films generally present a gradient of ordering from the air/sol interface to the interior of the film, with a 3…
We report the latest release (version 1.6) of the CATH protein domains database (http://www.biochem.ucl. ac.uk/bsm/cath ). This is a hierarchical classification of 18 577 domains into evolutionary families and structural groupings. We have identified 1028 homo-logous superfamilies in which the proteins have both struc…