Materials Literature
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Anodizing of magnesium was studied in solutions containing 3 M KOH + 0.6 M KF + 0.21 M Na 3 PO 4 , with and without addition of 0.4 M and 1.1 M of aluminate. At constant applied current, the process occurs in two stages. First, the voltage rises linearly until an initial breakdown occurs. A thin and compact oxide film…
The extracellular matrix (EMC) of muscle is composed mostly of the protein collagen with lesser quantities of other constituents such as proteoglycans also present. The focus of this brief review is the extracellular modification of collagen, critical to forming a stable matrix, called crosslinking. Enzyme-mediated co…
The application of the Jiles-Atherton hysteresis model for numerical modelling of measured magnetic hysteresis characteristics of constructional steel is investigated. Parameter identification is done using the stochastic optimization method "simulated annealing". Modifications of the original model, which were propos…
Low temperature vacuum deposition of tungsten carbide coatings, W1−yCy with compositions that varied from y=0 to 0.9, was investigated. Special attention was given to the production of nanocrystalline carbides with coatings of y>0.5. Previous attempts at producing WC with excess carbon at near room temperatures…
Photo-assembly of reactive liquid crystals by simultaneous diffusion and polymerization can give rise to interesting new polymeric architectures. In this report, the authors summarize recent results, which show how deformation of the molecular helix in a cholesteric network can give rise to interesting new optical pro…
Epoxide hydrolases catalyze the cofactor-independent hydrolysis of reactive and toxic epoxides. They play an essential role in the detoxification of various xenobiotics in higher organisms and in the bacterial degradation of several environmental pollutants. The first x-ray structure of one of these, from Agrobacteriu…
Octahedral M[N(CN)2]2 (M = Cr, Mn) have been prepared and exhibit a spontaneous magnetization below ordering temperatures of 47 and 16 K, respectively, due to a transition to a weak-ferromagnetic ground state. This is contrast to the ferromagnetic ordering observed for octahedral M[N(CN)2]2 (M = Co, Ni).
The present paper reviews the recent progress of studies on growth, characterization and properties of relaxor ferroelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals in Shanghai Institute of Ceramics. Their chemical compositions were selected near the rhombohedral-tetragonal morphotropic phase boundary, more favorable…
The metal ion-implantation of titanium oxide with metal ions (Cr + or V +) at high energy acceleration and the subsequent calcination of these metal ion-implanted TiO 2 in oxygen at around 725 K resulted in a large shift in the absorption spectra toward visible light regions. These catalysts exhibited effective and re…
The synthesis, characterization, and X-ray structure of the first example of an air-stable silver(III) complex of an N-confused tetraphenylporphyrin (5,10,15,20-tetraphenyl-2-aza-21-carbaporphyrin argentate(III) or Ag(III)NCTPP, 7 ) is reported. Crystals of Ag(III)NCTPP·CH 2 Cl 2 belong to the monoclinic space group P…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSelf-Assembled Inverted Micelles Prepared from a Dendrimer Template: Phase Transfer of Encapsulated GuestsVictor Chechik, Mingqi Zhao, and Richard M. CrooksView Author Information Department of Chemistry, Texas A&M University P.O. Box 30012, College Station, Texas 7784…
Assembly of soluble N-ethylmaleimide-sensitive fusion attachment protein receptor (SNARE) proteins between two opposing membranes is thought to be the key event that initiates membrane fusion. Many new SNARE proteins have recently been localized to distinct intracellular compartments, supporting the view that sets of…
Colloidal gel and glass transitions are investigated using the idealized mode coupling theory (MCT) for model systems characterized by short-range attractive interactions. Results are presented for adhesive hard sphere and hard core attractive Yukawa systems. According to MCT, the former system shows a critical glass…
The results of experimental investigations of induced photopleochroism of elementary (Si, Ge), binary (III-V, II-VI), and more complicated diamond-like semiconductors (III-V—III-V solid solutions, ternary compounds I-III-VI and II-IV-V compounds) and photosensitive structures based on them are discussed and generalize…
We have studied the dynamics of grain growth and the pinning effect of grain boundaries on magnetic domain walls in FeCo soft magnetic alloys. It has been found that grain growth takes place at temperatures above 600 °C. The activation energy for grain growth in a disordered state at 820 °C is about 57.4±0.5 kcal/mole…
peak intensities and peak positions. Their results indicated that as the coordination number of the Ti site increases from 4 to 6, the pre-edge intensity decreases and the energy of the peak increases by approximately 0.9 eV for each additional coordinating oxygen atom, starting from around 4969.6 eV for the tetrahedr…
Using a high-pressure (HP) technique, samples of γ-Al 2 O 3 were obtained by compaction at 4.5 GPa, in a toroidal-type apparatus, at room temperature (RT) and at higher temperatures. Compaction at RT produced crack-free, translucent, and dense samples. An improvement of these properties was observed for samples compac…
We have measured the thermoelectric power and conductivity as a function of temperature of a wide range of polypyrrole samples, including a film of soluble polypyrrole synthesized chemically, and wrinkled films synthesized using indium–tin oxide electrodes; other samples investigated include high-conductivity polypyrr…
The concept of functionally graded materials (FGMs), originally developed for the purpose of reducing thermal stress, has now greatly expanded and is being applied to the development of electrical, optical, magnetic, and biochemical materials. Here in Japan, several FGM research projects have been promoted with the su…
Analytic solutions to the mathematical model of an electrochemical capacitor (EC) are used to study cell performance under two types of operating conditions: ( i ) constant current and ( ii ) electrochemical impedance spectroscopy. The analytic solution under constant‐current operation is used to investigate the relat…