National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Study of photosynthetic response of green algae on presence of selected heavy metals
NOVÁK, Jan
With the world population growth, more and more agricultural areas fall into regions affected by waste products. Therefore it is important to determine their impact on environment toxicity. The aim of this thesis is to evaluate the effect of selected ions of heavy metals (CoSO4, CuSO4, CdSO4, ZnSO4 and K2Cr2O7) on the process of photosynthesis in a selected green algae species (Scenedesmus quadricauda) by means of monitoring of dynamics of oxygen release into solution of nutrient medium. The experiments with individual compounds proceeded by pH 7, temperature 25°C and light 450 ?mol m-2 s-1. Algareact device developed by the company BVT Technologies was used for measuring. Comparison with growth curves Scenedesmus quadricauda by different pH was used for the validation of the method. The method of the measurement of dissolved oxygen in medium is suitable for the measurement of immediate impact of chemical compounds on photosynthetic activity of examined organism. The method is restricted by the fluidity of measured solution. The lowest quantity of oxygen disolved inmedium was measured by CdSO4 in concentration 0,1 M.
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.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.