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The effect of yttrium and samarium oxide nanoparticles on plant development
 Brandová, Zuzana ; Soudek, Petr (advisor) ; Petrová, Šárka (referee)
This thesis is based on hydroponic experiment conducted on Hordeum vulgare with nanoparticles of rare earth elements in concentration 2·10-4 mol/L and REEs chlorides in concentration 3·10-4 mol/L. The comparison of the the effect on their acumulation of another nanoparticles in the sloution and normal medium is included as well. In this case the hydroxyapatite NPs were chosen in the same concentration as yttrium and samarium NPs. The role of type and form of the elements on their acumulation and impact is also studied. Negative effect of REEs was proven by enzymatic analysis that detects reducting enzymes and determination of plant pigment levels by high performance liquid chromatography. Because both types of substances can reduce reactive oxygen radicals. Acumulation of REEs was determined by ICP spektrometry. Key words: nanoparicles, reare earth elements, reductive enzymes, plant pigments, acumulation, oxidative stress
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