A total of 12 multicomponent solutions of various compositions were developed in which we attempted to blend calcium and phosphoric salts, which usually precipitate and form sediments. Among the medicines of similar composition and purpose registered in Lithuania, there is none containing all three important macroelements: Ca, Mg, and P. After the tests, one of the solutions tested – C2 – was registered in Lithuania and was manufactured by AB Ukmergės Biofabrikas (Lithuania) for several years. Production technology of the developed preparation – Kamavetas – is patented (patent No. LT 4509 B. 1999 05 25). Kamavetas is the first preparation created and manufactured in Lithuania, which contains Ca, Mg, and P salts and glucose. It is convenient to use, because the animal receives several mineral substances within a single infusion.

In this master work the influence of calcium ions on the cadmium mobility in the sandy and clay soils was investigated. Work subject - samples of Orthieutric Fluvisol and Calcaric-Endohypogleyic Luvisol topsoils taken from arable lands in Balbieriskis distirict. Work objective - to investigate the influence of calcium ions on the cadmium adsorption-desorption processes in the model systems of different kind of soil-Cd(NO3)2-Ca(NO3)2 simulating pH, Cd2+ and Ca2+ amounts. Work methods - the investigated soil samples were agitated for 1 hour with Cd(NO3)2 and Ca(NO3)2 solutions of various concentrations. The solutions were made in the 0.03M NaNO3 for the constant ionic strength maintaining. The Cd amounts in the equilibrium solution after the adsorption were determined with atomic absorption spectrometer (AAS). The Cd desorption was investigated in the samples after adsorption using 0.05M NH4-EDTA (pH 7) solution as extractant. The Cd amount in extract was determined with AAS. Work results - results of the research showed that in the clay soil were accumulated more mobile Cd ions under the influence of Ca ions than in the sandy soil. The clay soil adsorbed for 25 % less and desorbed for 77 % more mobile Cd ions than sandy soil. When soil contamination with Cd was increased from 8 till 40 mg/kg, the Cd adsorption increased about 17 % in both alkaline (pH 8) and acidic (pH 4) medium, while in the sandy soil it decreased about 7 % at pH 8 and increased about 3 % at pH 4. The... [to full text]