Materials Literature
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Several cyclam incorporating silica gels have been synthesised using three different methods, including a sol–gel approach. These various materials show different textures and the macrocycle contents can reach values up to 1.5 mmol g−1. Cu(II) and Co(II) complexes of these modified silica gels have been studied. Final…
The intercalation of a cationic azobenzene derivative into the interlayer space of magadiite was conducted by the ion exchange reactions between magadiite and p-[2-(2-hydroxyethyldimethylammonio)ethoxy]azobenzene bromide. X-Ray diffraction and elemental analysis confirmed the formation of the p-[2-(2-hydroxyethyldimet…
Chromium dioxide films on TiO 2 (110) single crystals have been grown by using chemical vapor deposition. The average growth rate was ∼1.8 nm·min - 1 . Powder X-ray diffraction indicated that the films were highly (110) textured. X-ray photoelectron spectroscopy showed that the CrO 2 films were continuous and no other…
Kusber, W.-H. & Jahn, R. 2002 (17 May 2002): Annotated list of diatom names by Horst Lange-Bertalot and co-workers. – Version 1.0.
The effects of several commonly used heat treatment schemes on the microstructures of two Ti–Nb–Ta–Zr alloys aimed at biomedical applications were studied in this work using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The specimens were water quenched from 790°C and then aged at temp…
This paper provides an elementary introduction into modeling of localized inelastic processes such as cracking or formation of shear bands. The basic concepts are explained using a simple one-dimensional example. It is shown that a stress-strain law with softening used in a standard continuum description leads to phys…
The hitherto poorly understood phenomenon of anomalous slip in body-centred cubic (bcc) metal crystals, constituting a striking violation of Schmid's law of resolved shear stresses in limited ranges of temperature and crystallographic orientation of the stress axis, is shown to be a natural consequence of the fact tha…
CuAlO 2 is a delafossite‐type compound and is a known p ‐type semiconductor. Transparent CuAlO 2 thin films were prepared using a sol–gel technique. The films with an Al/Cu atomic ratio of 1.0 consisted of CuAlO 2 , Cu 2 O, and CuO after heat treatment at 800°–900°C in nitrogen gas. The electrical resistivity of the f…
Glutamine 114 of OYE1 is a well conserved residue in the active site of the Old Yellow Enzyme family. It forms hydrogen bonds to the O2 and N3 of the flavoprotein prosthetic group, FMN. Glutamine 114 was mutated to asparagine, introducing an R-group that is one methylene group shorter. The resultant enzyme was charact…
The relationship between primary and secondary recrystallization texture of grain oriented silicon steel, of which process is the only one case applying the secondary recrystallization phenomenon in the steel industry, was examined. The specimens with various kinds of the primary texture were obtained by changing the…
Silk fabrics were treated with O2, N2, and H2 plasmas for deep dyeing and good color fastness to rubbing. C.I. (Color Index) Reactive Black 5 was used as a dye, and color deepness was evaluated by total K/S. All plasma-treated silk fabrics showed weight loss, especially by O2 plasma. Total K/S of dyed silk fabrics tre…
Protein adsorption on polymer particles has significant importance in biomedical applications, both in vitro and in vivo. It has, therefore, been studied from all viewpoints for the last two decades, but the results were inconsistent
The corrosion behavior of Al 2024-T3 and C26000 brass exposed to artificial seawater and Luria Bertani medium has been studied using electrochemical impedance spectroscopy. Tests were performed in sterile media and in the presence of three strains of bacteria. A Bacillus subtilis biofilm was genetically engineered to…
Injecting aqueous solutions of hydrogen peroxide (H2O2) into hot flue gases can convert nitric oxide (NO) to higher oxidation states (NO2,HNO2, and HNO3), which can then be removed in a wet scrubber. The optimum temperature for such conversion is 500°C (930°F), at which H2O2 is thermally “activated” (split into free r…
The dynamic pattern formation and the beam-steering characteristics of cholesteric gratings were studied. Films with a planar cholesteric texture and various thickness to pitch length ratios ( d / p ) were fabricated. An optical microscope was used to observe the stripe patterns of the cholesteric gratings formed by a…
Reaction of the mononuclear ‘complex ligands’ [Re(CO)3Cl(L)] [L = 2,2′-bipyrimidine (bpym) or 2,3-bis(2-pyridyl)pyrazine (bppz)] with a Ln(β-diketonate)3 unit affords the heterodinuclear complexes [Re(CO)3Cl(μ-bpym)Ln(fod)3] and [Re(CO)3Cl(μ-bppz)Ln(tta)3]; one member of each series has been structurally characterised.
The experimental determination by means of DSC together with a thermodynamic analysis of the two-component phase diagram of octylcyanobiphenyl (8CB)+ octyloxycyanobiphenyl (8OCB) has been performed. The thermodynamic consistency of the two-component system has been proved and similar excess Gibbs energies for mixtures…
Experimental investigations of the transport phenomena (electric conduction; Seebeck, Hall, and Nernst-Ettingshausen effects) in PbTe and Pb 1− x Sn x Te solid solutions with high content of In impurity (up to 20 at. %) at temperatures of up to 400 K are reviewed. Many properties of these substances are similar to tho…
In the last decade the sol‐gel process became a promising method to synthesize materials in form of coatings, nanoscale powders and porous systems. Several products or devices made with such a process already exist on the market. This paper briefly reviews the state of the art in the development of electrochromic coat…
The steady-state and impedance response of a solid metal point electrode in contact with a solid, oxygen-ion conducting electrolyte in atmospheres was derived for three reaction mechanisms, involving gaseous species or species adsorbed on the surface of the electrode and/or the electrolyte. The overall electrochemical…