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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Effect of oxidative stress on telomere lenght in \kur{Drosophila melanogaster}
 SZAKOSOVÁ, Klára
Oxidative stress is caused by an imbalance between high production of reactive oxygen species and ability of organism to detoxify them or counteract their effects. The chromosomal ends telomeres - are specialized nucleoprotein structures protecting chromosome ends from DNA damage. Telomeres of Drosophila melanogaster are arrays of specific non-long terminal repeated (LTR) retrotransposons HeT-A, TART and TAHRE. This thesis evaluates effects of exposure of paraquat, which is a strong oxidative stress inducer, on telomere length and transcription activity in Drosophila.
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Effect of oxidative stress on antioxidant enzymes in \kur{Drosophila melanogaster}.
 SZAKOSOVÁ, Klára
Oxidative stress reflects an imbalance between reactive oxygen species and antioxidant defense, which can result in cellular damage. The reactive radicals can interact with cell components, including proteins, lipids and nucleic acid. Antioxidant enzymes are the main defense against oxidative stress, representing by two the most important enzymes, catalase and superoxide dismutase. In this thesis I studied the effect of oxidative stress on activity of antioxidant enzymes in Drosophila melanogaster and Locusta migratoria, after exposure to the herbicide paraquat.
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