Претраживање
Приказ резултата 1-10 од 64
Graphic simulation of STM images of Si(111)7X7 surface
(Trans Tech Publications Ltd., 1997)
The posibilities of graphic STM image simulation at atomic level are indicated. The presented procedure takes into account various types of deformation on the surface near the Fermi level. A clean Si(111)7X7 surface is ...
Low temperature processes during the synthesis of lanthanum lead borosilicate glasses
(Serbian Chemical Society, Belgrade, 1997)
Low temperature processes during the synthesis of PbO-B 2 O 3 -SiO 2 -La 2 O 3 glasses were studied by thermal analysis of the batch mixture of glasses and X-ray powder diffraction analysis of samples that crystallized ...
Elimination of vanadium and arsenic from VKCs catalysts
(Marcel Dekker Inc, New York, 1997)
Vanadium and arsenic eliminations from an alkaline leaching solution of spent VKCs catalysts were studied. To this end, several commercial resins or polymers synthesized in the laboratory were evaluated in a solid-liquid ...
The influence of the sintering regime on the stability of the SmCo5 phase
(Elsevier, Amsterdam, 1997)
The purpose of this investigation was to establish the correlation between the sintering conditions (temperature and time) and the stability of the SmCo5 phase, expressed by the intensity of its most important diffraction ...
Synthesis and formation mechanism of submicrometre spherical cordierite powders by ultrasonic spray pyrolysis
(Chapman Hall Ltd, London, 1997)
Cordierite powders containing very pure submicrometre spherical particles have been synthesized by the ultrasonic spray pyrolysis. Aqueous solutions of silicic acid, Al(NO3)(3) . 9H(2)O and MgCl2 . 6H(2)O were used as ...
Development of an integrated system for air pollutant dispersion modelling
(Inderscience Publishers, 1997)
A complex expert system for air pollutant dispersion modelling (ScalEx) is currently being developed at Faculty of Technology and Metallurgy in Belgrade. The project goal is to develop a powerful software system as an ...
Effect of substituents on the C-13 NMR chemical shifts of para-substituted alpha-phenyl-beta-pyridylacrylic acids
(Elsevier, Amsterdam, 1997)
The C-13 NMR spectra of para-substituted alpha-phenylcinnamic and 3- and 4-pyridylacrylic acids, with a wide range of substituents effects, were determined in deuterated dimethylsulfoxide (DMSO-d(6)). The effect of ...
Comparison of critical ΔT-values with R-parameters of thermally shocked alumina refractories
(Expert Fachmedien GmbH, 1997)
The thermal shock stability of ceramic materials can be characterized using critical temperature difference or resistance parameters. Resistance parameters R and Rst are used in this paper. Two ways of representing thermal ...
Boron and phosphorus doped glassy carbon: I. Surface properties
(Pergamon-Elsevier Science Ltd, Oxford, 1997)
The effects of boron and phosphorus incorporation in phenolic resin precursor on the surface properties of glassy carbon (GC) have been studied. Characterization of the surface properties using X-ray photoelectron spectroscopy ...
Recent advances in homogeneous and heterogeneous asymmetric catalysis with nitrogen-containing ligands
(Baltzer Sci Publ Bv, Bussum, 1997)
Nitrogen-containing chiral ligands are being used more and more in asymmetric catalysis. This article is an overview of results published in 1993-1996 in this field and tries to open new perspectives for this type of ligand, ...