Materials Literature
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Weak-fringing faults have been observed in planar slip bands in a Ti-6 wt% Al alloy by transmission electron microscopy. The magnitude of the contrast was observed to increase with the number of dislocations shearing a particular region in the slip plane, and the fringe contrast was observed to saturate along a slip b…
2-Cyclohexenol (1) is oxidized chemoselectively to 2-cyclohexenone (2a) by the α-Keggin chromium-substituted polyoxometalate (POM) Ia as the catalyst and iodosobenzene as the oxygen source. For the chromium(salen) catalyst IIa the same chemoselectivity in favor of allylic CH oxidation is observed. The manganese-substi…
Abstract A quantitative modelling of the disorder phenomena in layered NbS 2 is presented. The polytypes 2H and 3R are considered and the variations of the intensity profiles for their transformations into each other are calculated in terms of a one-dimensional disorder model.
Abstract The thermal degradation of different polar polyethylene copolymers, ethylene/methylacrylate (EMA), ethylene/ethylacrylate (EEA), ethylene/butylacrylate (EBA), ethylene/methylmethacrylate (EMMA), and ethylene/hydroxyethylmethacrylate (EHEMA), was studied by using thermogravimetric analysis (TGA), infrared anal…
A generalization of a piece-wise linear (PWL) circuit model of hysteresis is presented. The model is defined as superposition of hysteresis operators originated by proper voltages in a simple PWL circuit. Static hysteresis and the dynamic features are governed by different parameters of the model. Moreover, the PWL ci…
2,5-Bis(di-tert-butylfluorosilyl)furan reacts with potassium hydroxide in a 1:2 molar ratio to give 2,5-bis(di-tert-butylhydroxysilyl)furan, O(CRCH)2 [R = SiOH(CMe3)2 (1)]. Compound 1 is very selective in its adduct formation and forms host-guest complexes in the presence of KF [1·1/2KF (2)], H2O [1·H2O (3)], NH3 [1·N…
The Auger parameter in vapour-deposited Mg-Ti alloys (Mg-4.2 at.% Ti, Mg-7.6 at.% Ti, Mg-15.1 at.% Ti, Mg-20.7 at.% Ti, Mg-25.3 at. % Ti and Mg-30.2 at.% Ti) has been measured using high-energy X-ray photoelectron spectroscopy with a Cr Kβ (hv = 5946.7 eV) X-ray source. The charge transfer occurring upon alloying was…
Kiwifruit plants (Actinidia deliciosa cv. Hayward) were grown in Hoagland nutrient solution with calcium nitrate, potassium nitrate, ammonium nitrate or ammonium chloride as the nitrogen source. Plants grown in the solution with nitrate nitrogen displayed a higher oxalate content, greater shoot length and leaf area, a…
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…