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Determination of perfluorinated compounds using separation methods
Blažková, Eva ; Márová, Ivana (referee) ; Vávrová, Milada (advisor)
The theoretical part of this diploma thesis consists of current matters regarding the presence of perfluorinated organic compounds in living environment elements. The attention has been focused on perfluoroktanoic acid (PFOA), (PFOS), and (FOSA). Physical-chemical characteristics of these organic pollutants and their toxicological and environmental aspects have been described. Possible ways of the pollutants analytical determination have been specified. The experimental part has explored effects of extraction techniques (sonication, pressurized solvent extraction, solid-phase extraction) used for PFAS separation from seats of fire soil sample. Identification of the analytes have been achieved by liquid chromatography/mass spektrometry.
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South-Moravian lignite as a source of carbon nanoparticles
Drozdová, Miroslava ; Taraba, Boleslav (referee) ; Pekař, Miloslav (advisor)
This Master’s thesis deals with isolating carbon nanoparticles from South Moravian lignite using "green" – environmentally friendly methods. This method consists of mechanical-chemical-thermal stressing of lignite using ultrasound, hydrogen peroxide and high temperatures. This work aims to develop recommendations on coal as a source of carbon nanoparticles and based on these recommendations, to design procedures for isolating nanoparticles from South Moravian lignite using environmentally friendly methods. The identified procedures were designed to meet carbon-based particles with an oxidized surface. From the results we can deduct that it is possible to use South Moravian lignite for the preparation of carbon nanoparticles. However, it will be necessary to modify the process further and also to optimize the purification of the obtained particles.
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Evaluation of the effectiveness of selected methodical approaches for disagregation of staphylococcal biofilm biomass
Nosková, Martina ; Konečná, Klára (advisor) ; Jílek, Petr (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Biological and Medical Sciences Subject of study: Bioanalytical laboratory diagnostics in healtcare Student: Bc. Martina Nosková Supervisor: RNDr. Klára Konečná, Ph.D. Title: Evalution of the effectiveness of selected methodical approaches for disagregation of staphylococcal biofilm biomass Background: Evaluation of the impact of selected biochemical and physical approaches on the disaggregation of the biofilm community formed by the bacterium Staphylococcus aureus. For the biochemical approach was chosen enzyme proteinase K, the impact of sonication, shaking with/without glass beads was studied within the physical approaches. Methods: Staphylococcal biofilm was formed in vitro in two methodical configurations - in the wells of a microtiter plate and on pegs (analogy to the Calgary Biofilm Device). To evaluate the degree of consistency of the obtained data, which reflects the homogenity of the biofilm biomass disaggeragation, the "recovery" method, and the method of metabolic activity evaluation, using the Alamar Blue indicator. To express the degree of effectiveness of the chosen approaches on the overall disaggregation of the biofilm community, the method of quantification of biofilm biomass by crystal violet staining was...
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Evaluation of the effectiveness of selected methodical approaches for disagregation of staphylococcal biofilm biomass
Nosková, Martina ; Konečná, Klára (advisor) ; Jílek, Petr (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Biological and Medical Sciences Subject of study: Bioanalytical laboratory diagnostics in healtcare Student: Bc. Martina Nosková Supervisor: RNDr. Klára Konečná, Ph.D. Title: Evalution of the effectiveness of selected methodical approaches for disagregation of staphylococcal biofilm biomass Background: Evaluation of the impact of selected biochemical and physical approaches on the disaggregation of the biofilm community formed by the bacterium Staphylococcus aureus. For the biochemical approach was chosen enzyme proteinase K, the impact of sonication, shaking with/without glass beads was studied within the physical approaches. Methods: Staphylococcal biofilm was formed in vitro in two methodical configurations - in the wells of a microtiter plate and on pegs (analogy to the Calgary Biofilm Device). To evaluate the degree of consistency of the obtained data, which reflects the homogenity of the biofilm biomass disaggeragation, the "recovery" method, and the method of metabolic activity evaluation, using the Alamar Blue indicator. To express the degree of effectiveness of the chosen approaches on the overall disaggregation of the biofilm community, the method of quantification of biofilm biomass by crystal violet staining was...
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South-Moravian lignite as a source of carbon nanoparticles
Drozdová, Miroslava ; Taraba, Boleslav (referee) ; Pekař, Miloslav (advisor)
This Master’s thesis deals with isolating carbon nanoparticles from South Moravian lignite using "green" – environmentally friendly methods. This method consists of mechanical-chemical-thermal stressing of lignite using ultrasound, hydrogen peroxide and high temperatures. This work aims to develop recommendations on coal as a source of carbon nanoparticles and based on these recommendations, to design procedures for isolating nanoparticles from South Moravian lignite using environmentally friendly methods. The identified procedures were designed to meet carbon-based particles with an oxidized surface. From the results we can deduct that it is possible to use South Moravian lignite for the preparation of carbon nanoparticles. However, it will be necessary to modify the process further and also to optimize the purification of the obtained particles.
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|
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Determination of perfluorinated compounds using separation methods
Blažková, Eva ; Márová, Ivana (referee) ; Vávrová, Milada (advisor)
The theoretical part of this diploma thesis consists of current matters regarding the presence of perfluorinated organic compounds in living environment elements. The attention has been focused on perfluoroktanoic acid (PFOA), (PFOS), and (FOSA). Physical-chemical characteristics of these organic pollutants and their toxicological and environmental aspects have been described. Possible ways of the pollutants analytical determination have been specified. The experimental part has explored effects of extraction techniques (sonication, pressurized solvent extraction, solid-phase extraction) used for PFAS separation from seats of fire soil sample. Identification of the analytes have been achieved by liquid chromatography/mass spektrometry.
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