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Study on PHa biosynthesis by cyanobacteria
Drinka, Jakub ; Kouřilová, Xenie (oponent) ; Obruča, Stanislav (vedoucí práce)
This bachelor thesis concerns with the effect of selected environmental stresses towards the viability of cyanobacterial species Synechocystis sp. PCC 6803 and Synechocystis salina CCALA 192. Both strains were studied via flow cytometry using the appropriate fluorochromes while also observing the applicability of these stains and precision of this method in the analysis of cyanobacterial cultures. In spite of the optimization being carried out, fluorescein diacetate was not suitable for the analysis of these cells because of their autofluorescence interfere with the fluorochrome emissions. Therefore, SYTOXTM Blue Dead Cell stain was used for the further experiments. A cryoprotective effect of polyhydroxybutyrate was observed during the freezing-thawing cycles. On the other hand, the culture rich in PHB seemed to be less resistant towards the oxidative stress induced by the hydrogen peroxide, probably justifiable by the state of chlorosis. Furthermore, this thesis deals with the increase/decrease in biomass concentration and intracellular PHB pool as a response to the external carbon source addition, analysed by the gas chromatography paired with FID detection. The most intesive cell growth in Synechocystis sp. PCC 6803 was detected in the presence of sodium acetate combined with gamma-butyrolactone while the highest PHB content in the medium supplied with acetate and 1,4-butanediol. Nevertheless, Synechocystis salina CCALA 192 showed markedly higher polyhydroxybutyrate accumulation under both photoautotrophic and mixotrophic conditions, the only non-suitable substrate was gamma-butyrolactone.
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Interakce živočišných buněk s organickými polovodiči
Schildová, Veronika ; Thalerová, Sandra (oponent) ; Víteček,, Jan (vedoucí práce)
Bakalářská práce se zabývá studiem biokompatibility organických polovodičů. V teoretické části byly popsány organické polovodiče, jejich vlastnosti, výhody a příklady vybraných zařízení na bázi organických polovodičů. Dále byla definována biokompatibilita a možnosti jejího stanovení, mezi které patří testy cytotoxicity, test stability materiálů, test adheze buněk aj. Poslední část byla zaměřena na buněčné kultury, optimální podmínky kultivace a složení média pro in vitro testování biokompatibility. V praktické části jsou prezentovány výsledky stanovení biokompatibility sledovaných materiálů. Pro testování byly použity 3T3 myší fibroblasty.
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Study on PHa biosynthesis by cyanobacteria
Drinka, Jakub ; Kouřilová, Xenie (oponent) ; Obruča, Stanislav (vedoucí práce)
This bachelor thesis concerns with the effect of selected environmental stresses towards the viability of cyanobacterial species Synechocystis sp. PCC 6803 and Synechocystis salina CCALA 192. Both strains were studied via flow cytometry using the appropriate fluorochromes while also observing the applicability of these stains and precision of this method in the analysis of cyanobacterial cultures. In spite of the optimization being carried out, fluorescein diacetate was not suitable for the analysis of these cells because of their autofluorescence interfere with the fluorochrome emissions. Therefore, SYTOXTM Blue Dead Cell stain was used for the further experiments. A cryoprotective effect of polyhydroxybutyrate was observed during the freezing-thawing cycles. On the other hand, the culture rich in PHB seemed to be less resistant towards the oxidative stress induced by the hydrogen peroxide, probably justifiable by the state of chlorosis. Furthermore, this thesis deals with the increase/decrease in biomass concentration and intracellular PHB pool as a response to the external carbon source addition, analysed by the gas chromatography paired with FID detection. The most intesive cell growth in Synechocystis sp. PCC 6803 was detected in the presence of sodium acetate combined with gamma-butyrolactone while the highest PHB content in the medium supplied with acetate and 1,4-butanediol. Nevertheless, Synechocystis salina CCALA 192 showed markedly higher polyhydroxybutyrate accumulation under both photoautotrophic and mixotrophic conditions, the only non-suitable substrate was gamma-butyrolactone.
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Interakce živočišných buněk s organickými polovodiči
Schildová, Veronika ; Thalerová, Sandra (oponent) ; Víteček,, Jan (vedoucí práce)
Bakalářská práce se zabývá studiem biokompatibility organických polovodičů. V teoretické části byly popsány organické polovodiče, jejich vlastnosti, výhody a příklady vybraných zařízení na bázi organických polovodičů. Dále byla definována biokompatibilita a možnosti jejího stanovení, mezi které patří testy cytotoxicity, test stability materiálů, test adheze buněk aj. Poslední část byla zaměřena na buněčné kultury, optimální podmínky kultivace a složení média pro in vitro testování biokompatibility. V praktické části jsou prezentovány výsledky stanovení biokompatibility sledovaných materiálů. Pro testování byly použity 3T3 myší fibroblasty.
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