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Classical-like states of spin s=1/2
(Physical Review A, 1999)
Recently a physically transparent definition of classical-like states of a quantum one-dimensional particle in a potential has been proposed [D. M. Davidovic and D. Lalovic, J. Phys. A. 31, 2281 (1998)]; such states have ...
Extraction of thallium with butyl acetate
(Separation Science and Technology, 1999)
Experimentally obtained extraction isotherms of the system thallium-sulfuric acid-sodium chloride-butyl acetate are presented. The influence of the sulfuric acid and chloride anion concentrations on the extraction equilibria ...
The nuclear quadrupole interaction of Ta-181 in the intermetallic compound Hf2Rh
(Journal of Physics: Condensed Matter, 1999)
The time differential perturbed angular correlation technique has been used to measure the electric field gradient at Ta-181 impurities in the intermetallic compound Hf2Rh. The results of the measurements show the presence ...
Sol-gel derived silicon nitride powders
(Journal of the Serbian Chemical Society, 1999)
The sol-gel synthesis of silicon nitride powders has been studied. The precursor gels were prepared from a colloidal dispersion of silicon dioxide and sucrose, with mole ratios of reactants, C/SiO2, ranging from 2 to 4. ...
Microstructural and mechanical characterization of postweld heat-treated thermite weld in rails
(Materials Characterization, 1999)
This paper describes a comparative study of the hardness characteristics, mechanical properties, microstructures, and fracture mechanisms of the thermite welded rail steel joints before and after heat treatment. It has ...
Vanadyl porphyrins in sedimentary kerogens/asphaltenes: Estimation of the concentration
(Journal of the Serbian Chemical Society, 1999)
A new, rapid method for determining the concentration of vanadyl porphyrins (VO2+-P) associated with the kerogen of bituminous sedimentary rocks, using electron spin resonance (ESR) is described. The method is simple, ...
Determination of metal traces in wine by argon stabilized d.c. arc
(Fresenius Journal of Analytical Chemistry, 1999)
A spetroscopic method for the determination of metal traces (Mn, Cu, Fe) in wine has been developed based on argon stabilized d.c. are plasma at atmospheric pressure. The experimental conditions were optimized using lateral ...
Far-infrared study of impurity local modes in gallium-doped PbTe
(Infrared Physics and Technology, 1999)
We present far-infrared reflection spectra and results of galvanomagnetic measurements of PbTe single crystals doped with gallium between 10 and 300 K. The analysis of the far-infrared reflection spectra was made by a ...
The microstructural changes of cobalt powder in consequence of cold pressing process
(Crystal Research and Technology, 1999)
The application of pressure as a technique for obtaining dense and mechanically strengthen materials has been investigated from the structural aspect by the use of X-Ray Powder Diffraction (XRPD) and Scanning Tunneling ...
Diminished peripheral glucose utilization in elderly persons
(Zeitschrift fur Gerontologie und Geriatrie, 1999)