Materials Literature
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The aim of this work is to describe a methodology for nonlinear magnetic field calculation applied on two-dimensional (2-D) finite element taking into account a static hysteresis model. The scheme is based upon the definition of modified governing equation derived from Maxwell's equations considering the magnetization…
Abstract X‐ray photoelectron spectroscopy has been in use for the study of materials for 30 years and with considerable success. In retrospect, however, it is clear that the many insights arising from work undertaken in the initial decade (the 1970s) are not well known to new users of the technique. Many of the simple…
Environmental scanning electron microscopy (ESEM) is a technique capable of imaging volatile and/or insulating samples in their natural state, without prior specimen preparation. It is thus a powerful potential tool for the study of the structure and dynamics of emulsions and other complex liquid systems, at a resolut…
In this paper, the analytic algorithm using equivalent magnetization curves is proposed for analysis of the three-phase transformer with wound-core in consideration of a step-lap joint or noncut structure. Influences of differences in step-lap joints and noncut structures on equivalent magnetization curves are examine…
The deformation of partially stabilized zirconia ZrO 2 (Y 2 O 3 ) with various pore morphologies is studied. During the synthesis of bar and lamellar ceramic structures, an effect of mechanical instability is discovered. This effect, along with the purely elastic behavior of the ceramic and the accumulation of microda…
Five new inorganic supramolecular complexes, [Hg6P4Cl3](SnCl3) (I), [Hg6As4Cl3](SnCl3)Hg0.13 (II), [Hg6As4Br3](SnBr3) (III), [Hg6Sb4I3](SnI3)Hg0.16 (IV), and [Hg7P4Br3](SnBr3) (V), have been prepared and their structures determined by X-ray single crystal experiments. They all crystallize in the cubic space group P213…
Tumor-selective macromolecular ligands containing 5-(p-Carbonyloxyphenyl)-10,15,20-triphenylporphyrin (HPTP) moiety (PHEA-DTPAHPTP and PAEA-DTPA-HPTP) were prepared by the incorporation of diethylenetriaminepentaacetic acid (DTPA) and 5-(p-hydroxylphenyl)-10,15, 20-triphenylporphyrin (HPTP) as the tumor-selective grou…
Heterogen katalysierte Sharpless-Epoxidierung: Ein Weinsäurederivat wurde auf der Oberfläche von SiO2 und in den Mesoporen von MCM-41 fixiert (siehe Bild). So erhaltene chirale Titan-Katalysatoren sind bezüglich Umsatzzahl und Enantioselektivität genauso effektiv wie entsprechende Komplexe in Lösung, und das Epoxidier…
The thickness change of extruded low density polyethylene (LDPE) foam as a function of the blowing agent and aircounter diffusion during the post-extrusion aging process is modeled. The blowing agent and air counter diffusion equations are coupled with the viscoelastic equations to model the foam volume shrinkage and…
We have prepared magnetic anisotropic polycrystalline hexaferrites Ba(ZnTi)/sub x/Fe/sub 12-2x/O/sub 19/ with high orientation degrees f and low dielectric loss tangent tg/spl delta//sub /spl epsiv// by standard ceramic techniques with magnetic alignment of the grains' c axis during wet pressing and in flowing-oxygen…
EBSD orientation mapping has been used to derive subgrain boundary misorientation distributions in a series of hot deformed and etched NaCl samples. The main objective of this study has been to examine the influence of data processing, noise caused by angular resolution limits and step size on the subgrain misorientat…
We have studied metallic and oxidized chromium layers on thin ordered alumina films grown on a NiAl(110) substrate using x-ray photoelectron spectroscopy. The interaction between the chromium layers and the substrate has been characterized after deposition at room temperature and after oxidation at 300 and 700 K. Our…
Abstract Tofu, containing high viscosity chitosan dissolved in a δ-gluconolactone solution, was prepared and physico-chemical properties, microstructure, textural properties and sensory characteristics were investigated. Moisture content and pH of the chitosan tofu were slightly lower than those of the control tofu. T…
We present an inclusive macroscopic model of ferromagnetic hysteresis. We developed the model from a Stoner-Wohlfarth approach by adding the mean-field or nearest-neighbor interactions and the effect of pinning. The model includes features of the Jiles-Atherton model in the previous Atherton-Beattie extension of the S…
The influence of the tin octanoate catalyst on the physical and thermal properties of RTV 5370 polysiloxane rubbers has been studied. To assess the likely influence of crosslinking on a number of physical and thermal properties in polysiloxanes, model siloxane networks (representing networks of well defined compositio…
We explore the origin of visible photoluminescence in nanoscale silicon cones fabricated by reactive ion etching in silicon-on-insulator substrates utilizing rough silver films as masks. Photoluminescence (PL) visible to the naked eye was observed after oxidation and annealing. Samples oxidized at 900 °C exhibit inten…
Carbon steel (CS) coupons covered with an artificial biofilm—which consisted of 0.6% agarose and diluted activated sludge (150 mg/L) from a municipal wastewater plant—were exposed to synthetic wastewater. When only one side of the coupon was covered with the artificial biofilm, mass loss of the steel coupon reached 0.…
Poly(L-lactide)–poly(ethylene glycol) (PLA–PEG) multiblock copolymers with predetermined short blocks (Mn ≤ 3000) were synthesized by polyesterification of PLA diols with PEG diacids in the presence of dicyclohexycarbodiimide and dimethylamide pyridine. The molecular structure and morphological features of the resulti…
This paper presents the iron-loss analysis of an induction motor model core. We have analyzed the induction motor model by using the improved finite-element method considering the vector magnetic properties, which means the relation between the magnetic flux density B vector and the magnetic field strength H vector. A…
Abstract An investigation on in situ polymerization of styrene in deproteinized natural rubber (DPNR) latex and high ammonia natural rubber (HANR) latex was carried out. The ratio of styrene to dry rubber was fixed at 25 : 75 by weight. It was observed that, at reaction temperature of 60 °C and reaction time of 10 hou…