Materials Literature
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TlTaSe 3 was prepared from a fused mixture of Tl 4 Ta 2 Se 11 , Ta and Se in the molar ratio 1:2:1. The compound shows dimorphism with H-TlTaSe 3 , hexagonal, space group P6 3 /mmc, a = 7.2436(6), c = 5.9736(6) Å , c/a = 1.213 and O-TlTaSe 3 , orthorhombic, space group Pnma, a = 9.554(13), b = 3.6244(6), c=14.7271(17)…
The photochemical properties of CaF 2 crystals activated by Ce 3+ and Yb 3+ ions are studied. A model of the photodynamic processes induced by pumping UV or VUV radiation in active media is suggested and experimentally verified. This model explains both the presence of color centers of electronic and hole nature in cr…
We studied the role of inorganic P and Se(IV) in calcite precipitation inhibition in a Panoche Creek, California, soil. Calcite precipitation inhibition by inorganic P and Se(IV) was first examined in simple Ca2+-Na+-Cl−-HCO3− solutions. In these simple solutions, the presence of small quantities (~0.2 mg L−1) of inor…
Abstract The sarkinite, Mn 2 (OH)AsO 4 , mineral has been synthesized in laboratory as pure phase under mild hydrothermal conditions. The decomposition process of the hydroxiarsenate compound is strongly dependent on the atmospheric conditions. The results of the thermal treatment in air or argon are quite different.…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
The objective of this study was to evaluate the relationship between clay mineralogy, specific surface area (SSA) and micromorphology in polygenetic Konza soil series. Physical, chemical and mineralogical analyses were performed on disturbed soil samples, and micromorphological investigations of selected horizons were…
The electron-stimulated luminescence (ESL) from amorphous solid water and crystalline ice films deposited on Pt(111) at 100 K is investigated as a function of the film thickness, incident electron energy (5-1000 eV), isotopic composition, and film structure. The ESL emission spectrum has a characteristic double-peaked…
The Helium blanketing effect on LaNi5-xAlx and ZrCo alloy is researched. Hydrogen absorption and desorption change due to gaseous helium has been investigated by the serial experiments under different conditions. Helium reduces hydrogen absorption and desorption rate, but it would not change the ultimate quantities of…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Abstract Homologous series of 2-oxochromen-6-yl 4-alkoxybenzoates (1-n, n = 2–10) and 4-alkoxybiphenyl-4′-carboxylates (2-n, n = 5–8) can gelate various organic solvents, where the gel–sol transition temperatures are ca. 60 and 90 °C, respectively.
The mechanisms of diffusion via grain boundaries in two-dimensional metals have been studied by method of molecular dynamics. It is established that the diffusion can proceed by two mechanisms, which results in deviations from the Arrhenius law. The first mechanism is related to the formation of chains of atomic displ…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
In order to extend the shelf-life of packaged or coated foods, an antibacterial edible film was developed from soybean meal that had been fermented with Bacillus subtilis under the optimum condition of pH 7.0-7.5 and 33°C for 33 h. The water vapor permeability of the fermented film (86.0 mg/cm 2 .h) was higher than th…
The essential oil distilled from the leaves of Coleus parvifolius Benth. (Labiatae) was studied by gas chromatography and mass spectrometry (GC-MS). The main components were found to be (E)-phytol (42.77%), followed by eicosatrienoate (16.39%), n-tetradecanoic acid (14.42%), octoil (6.54%), 2-methyl-7- octadecyne (5.9…
We have investigated buckling phenomena under axial compression for multiwall carbon nanotubes with the same outer diameter with different wall thicknesses obtained by the extraction of inner shells. According to the Euler's buckling model described by the continuum model, Young's moduli of the nanotube before and aft…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Abstract Films of particulate polyimide‐silica hybrids were produced by a sol‐gel process and were examined in terms of morphological structure and fracture properties at different temperatures, varying from 20 to 250 °C. The fracture toughness characteristics were studied by the “Essential Work of Fracture” method us…
Abstract The equal channel angular pressing (ECAP) of the AZ91 magnesium alloy was tested from 553 K to 693 K. The initial grain size of the investigated alloy in homogenized state was about 150 µm. Samples were deformed through a die characterized by an inner contact angle. During the ECAP process the microstructure…
Die thermische Spritztechnik umfasst Verfahren zum Beschichten von Bauteilen mit verschiedensten Werkstoffen, u.a. zum Schutz gegen Verschleis und Korrosion. Die Verfahren der relativ jungen thermischen Spritztechnik haben in den letzten 20 Jahren in der Oberflachentechnik einen festen Platz eingenommen und werden ihr…