Sintered Glass-Ceramics, Self-Glazed Materials and Foams from Metallurgical Waste Slag.

The materials used for the synthesis of parent glass are 70% wt. metallurgical slag and 30% wt. industrial quartz sand.

Investigations of the hygroscopic properties of ammonium sulfate and mixed ammonium sulfate and glutaric acid micro droplets by means of optical levitation and Raman spectroscopy.

In the presented work an optical levitation technique performed by means of a focused laser beam, Mie and Raman spectroscopy have been utilized for measuring hygroscopic growth curves and composition of laboratory generated single ammonium sulfate (AS) and internally mixed ammonium sulfate-glutaric acid (GA) droplets in the micrometer range. The generated particles have been found to immediately supersaturate (above 45wt% for AS) at 297 K after capturing in the laser beam. Further increase of the relative humidity (RH) up to 85% does not dilute the droplets under the saturation point.

Vacuum-thermic extraction (VTE) of toxic and essential elements from rocks with subsequent AAS determination-II.

The method of vacuum-thermic extraction (VTE) of Pb, Zn, Cd, Bi, Tl, As and Sb from soils with subsequent AAS determination of the elements as described previously [1] was adapted to the analysis of rocks. The design of the quartz extractor was improved and appropriate working conditions for a precise and accurate determination were developed. The method was applied to the analysis of various rock types.

Analytical characterization of some pyrazolones and their copolymers with some vinyl compounds.

Some new pyrazolones have been synthesized and their copolymers with styrene, methylmethacrylate and methacrylic acid prepared. The pyrazolones and their styrene and methylmethacrylate copolymers are insoluble in water but form chelate complexes with some alkaline-earth and transition metal ions. The water-soluble methacrylic acid copolymers do not form complexes with these elements, however, probably because of hydrogen-bonding of the chelating groups to the methacrylic acid carboxyl groups.