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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Arsenic and arsenic species cycle in environment
 Ševčíková, Kateřina ; Sommer, Lumír (referee) ; Dočekalová, Hana (advisor)
This bachelor thesis, based mostly on literature retrieval, deals with monitoring of individual arsenic compounds in the environment and is also reviewing methods used for their analysis. The experimental part is focused on determination of various arsenic in the Oncorhynchus mykiss tissue by HPLC-UV-HG-AFS. Obtained results showed that the arsenic was present in the tissue of the Oncorhynchus mykiss in form of arsenobetaine, which is common for fishes and other aquatic animals and is not toxic even for consuments.
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Arsenic and arsenic species cycle in environment
 Ševčíková, Kateřina ; Sommer, Lumír (referee) ; Dočekalová, Hana (advisor)
This bachelor thesis, based mostly on literature retrieval, deals with monitoring of individual arsenic compounds in the environment and is also reviewing methods used for their analysis. The experimental part is focused on determination of various arsenic in the Oncorhynchus mykiss tissue by HPLC-UV-HG-AFS. Obtained results showed that the arsenic was present in the tissue of the Oncorhynchus mykiss in form of arsenobetaine, which is common for fishes and other aquatic animals and is not toxic even for consuments.
Detailed record
Effect of environmentally relevant concentration of dexamethasone to fish organism
 BOŘÍK, Adam
Pharmaceutical pollutants have been aim of many recent aquatic environment studies. Due to human activities surface waters are polluted with plenty of substances, including products of personal care, which are ranked among a number of pharmaceuticals. The main goal of this work is to assess the impact of environmentally relevant concentrations of the synthetic glucocorticoid dexamethasone on aquatic organisms through biomarkers of oxidative stress. The principle of this experiment was chronic in vivo exposure model organisms (rainbow trout) to doses of this drug and the subsequent monitoring activities of antioxidant enzyme system in the liver and gill tissues. Experimental results have demonstrated a response enzymatic protection mechanism on the increased production of reactive oxygen species induced by the drug at environmentally relevant concentrations especially in gill tissue. Our results illustrate a real risk that this xenobiotic represents to aquatic organisms.
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