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	Bioaccumulation and toxicity of selenium compounds in the green alga Scenedesmus quadricauda UMYSOVÁ, Dáša Three strains of the green alga Scenedesmus quadricauda were selected to be specifically resistant to the presence of high concentrations of inorganic Se. The strain SeIV was found to be resistant to high doses of selenite, the strain SeVI was resistant to selenate, and the strain Se(IV+VI) to the presence of both Se compounds. It has been shown that both the dose and chemical form of Se are the critical factors in the cellular response. In this PhD. thesis are results from experiments with the resistant strains (activity of thioredoxin reductase, content of selenium and selenomethionine, effect of sulphur deficiency). Detailed record
	Selekce kmenů zelené řasy Scenedesmus quadricauda rezistentních vůči selenu Umysová, Dáša ; Hlavová, Monika ; Vítová, Milada ; Doušková, Irena ; Bišová, Kateřina ; Zachleder, Vilém Three mutant strains of the green alga Scenedesmus quadricauda were selected to be specifically resistant to the presence of high concentration of inofganic Se. The growth curves at the presence of various concentrations of selenite, selenate or misture of both compounds were monitored. Detailed record
	Aktivita thioredoxin reduktázy v divokém a selen rezistentích kmenech řasy Scenedesmus quadricauda rostoucích v přítomnosti anorganických sloučenin selenu Vítová, Milada ; Umysová, Dáša ; Doušková, Irena ; Rucki, M. ; Zachleder, Vilém We have selected resistant strains of Scenedesmus quadricauda able to tolerate high selenium concentration up to 400 mg/L added either as selenate Na2SeO4 (strain SeVI) or selenite Na2SeO3 (strain SeIV). We have investigated activity of selenoprotein thioredoxin reductase (TR) in both wild type and Se-resistant strains. Concomitantly, a total amount of organically bound selenium was evaluated in biomass dry weight. We have found that activity of TR rapidly increases in the SeVI resistant strain in the presence of selenate, while no effect on TR activity was found in SeIV resistant strain and only slight increase in wild type in the presence of selenite Detailed record
	Odstranění CO2 ze spalin pocházejících ze spalovny komunálního odpadu a produkce biomasy pomocí mikroskopických řas Doušková, Irena ; Doucha, Jiří ; Novák, P. ; Umysová, Dáša ; Vítová, Milada ; Zachleder, Vilém A municipal waste incinerator flue gas was used as a source of CO2 for cultivation of the alga Chlorella vulgaris, in order to decrease production costs of the biomass and to bioremediate CO2 simultaneously. The following results were obtained during the experiments: The utilization of the flue gas for a photobioreactor agitation and CO2 supply was proved to be convenient. A growth rate of algal cultures on the flue gas was even higher when comparing with the control (pure CO2 in air). The toxicological analysis of the produced biomass showed only a slight excess of mercury while all the others compounds (other heavy metals, PAHs, PCDD/Fs and PCBs) were below the limits required by foodstuff legislation Detailed record

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