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A new procedure of phosphogypsum purification in order to diminish the content of radionuclides
(Hungarian Journal of Industrial Chemistry, 2002)
Phosphogypsum obtained by "wet procedure" for phosphoric acid production is actually calcium-sulphate dihydrate, CaSO 4 ·2H 2 O, which contains a high percent of impurities as well as radionuclides, originating from the ...
On theta-connectedness and theta-closure spaces
(Elsevier, Amsterdam, 2002)
Let (X, T) be a topological space. A point x is in the theta-closure of A, denoted by cl(theta) A, if each closed neighbourhood of x intersects A. The pair (X, cltheta) is a closure space, also called a neighbourhood space. ...
Microcalorimetry in the identification and characterization of the most reactive active sites of heterogeneous catalysts
(Springer/Plenum Publishers, New York, 2002)
The microcalorimetric technique has been applied to investigate the strongest active sites of zeolites, heteropolyacids and perovskites. The differential heats of adsorption of carbon monoxide, ammonia and oxygen were ...
The effect of new herbicides on the grain yield of inbred lines of maize
(Fresenius Environmental Bulletin, 2002)
In these experiments, the reaction of 24 inbred lines of maize to the new herbicides Equip (formasulfuron), Callisto (mesotrione) and a combination of Motivel (nicosulfuron) with Banvel 480 S (dicamba) was investigated. ...
Study of corrosion resistance of chromium-nickel steel in calcium-hypochlorite solution
(Bulletin of Electrochemistry, 2002)
The purpose of this paper is to study the corrosion resistance of different samples bf chromium-nickel steel in calcium-hypochlorite solution, by potentiodynamic method. Corrosion resistance of Cr-Ni special steels is ...
Cell immobilisation by electrostatic droplet generation
(Bundesforschungsanstalt Landwirtschaft (Fal), Braunschweig, 2002)
This paper reviews the feasibility of electrostatic droplet generation for the production of uniform hydrogel microbeads and applications of this technique for cell immobilization. This is a novel extrusion technique that ...
Beer brewing with immobilized yeast cells - Current experiance and recent results
(Univ Zagreb, Zagreb, 2002)
Immobilization of yeast cells offers many potential advantages in beer brewing and during the recent years, it has gained increasing interest in brewing industry. Over free cell systems, such as higher cell densities and ...
Phase transformations and thermal effects of mechanically activated BaCO3 -TiO2 system
(Ferroelectrics, 2002)
Phase transformations and thermal effects of BaTiO 3 ceramics due to influence of mechanical activation were investigated. Equimolar mixture of BaCO 3 and TiO 2 powders was activated in high energy vibromill for various ...
Phase transformations and thermal effects of mechanically activated BaCO3-TiO2 system
(Taylor & Francis Ltd, Abingdon, 2002)
Phase transformations and thermal effects of BaTiO3 ceramics due to influence of mechanical activation were investigated. Equimolar mixture of BaCO3 and TiO2 powders was activated in high energy vibromill for various ...
Morpho-anatomical variability in different Canada thistle populations
(European Weed Research Soc, Wageningen, 2002)