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Self-Assembled Polymer Systems Based on Poly[(N-2,2-difluoroethyl)acrylamide] as Diagnostic and Theranostic Tracers for 19F Magnetic Resonance Imaging
Kolouchová, Kristýna ; Hrubý, Martin (advisor) ; Matějíček, Pavel (referee) ; Poučková, Pavla (referee)
In this doctoral thesis we describe a series of stimuli-responsive polymers which could be used as diagnostic tools or as smart drug delivery systems with simultaneous diagnosis (theranostics). All hereby mentioned polymers are thermoresponsive copolymers of (N-2,2-difluoroethyl)acrylamide exhibiting lower critical solution temperature in aqueous milieu. This means that they are water-soluble at low temperature while when heated above a certain temperature, they self-assemble into nano- or macro- sized assemblies. Because of the high concentration of fluorine atoms, all these polymers could be used as 19 F MRI tracers. We designed multiple different thermoresponsive, thermo- and pH-responsive, thermo-and reactive-oxygen-species-responsive polymers that could find numerous discussed applications in human medicine. We investigated their physico-chemical properties with 1 H and 19 F nuclear magnetic resonance (NMR), size exclusion chromatography (SEC), elemental analysis, dynamic light scattering (DLS), static light scattering (SLS), small angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and turbidimetry. After the physicochemical optimization of the parameters for the selected applications, their biocompatibility was tested in vitro. Several promising polymers were tested in vivo...
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Activity of hydrolytic enzymes in process of prodution of biogas
Kolouchová, Kristýna ; Tesařová, Eva (advisor) ; Kopečný, Jan (referee)
In this work, the activities of hydrolytic enzymes, functioning in the hydrolytic stage of the production of biogas, have been determined. The activities of -amylase, -xylanase, and -glucosidase have been measured in five samples collected from the following steps of biogas production:. cow dung from the adjacent cowshed, cow manure from the homogenization tank for dosing biogas plant, digester sludge from the outside biogas fermenter, degister sludge from the inside biogas fermenter, and sludge of digestate from digestate tank. Samples for measurement of enzyme activities were provided by agricultural biogas station AGRI FAIR in Deštná, which uses for biogas production cow manure and corn silage The activities of hydrolytic enzymes in the production of biogas are crucial, because degradability of feed material is the limiting factor. Activity of a amylase had highest value in cow dung and cow manure due to food containing high levels of starch. In subsequent phases falls evenly. In the indoor digester and digestate is already depleted substrate and the activity is at zero level. Its activity is almost three times higher than - glycosidase in cow dung and cow manure, but in the last three stages of -glycosidase activity exceeds amylase and its value is nearly stable. -xylanase has...
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Self-Assembled Polymer Systems Based on Poly[(N-2,2-difluoroethyl)acrylamide] as Diagnostic and Theranostic Tracers for 19F Magnetic Resonance Imaging
Kolouchová, Kristýna ; Hrubý, Martin (advisor) ; Matějíček, Pavel (referee) ; Poučková, Pavla (referee)
In this doctoral thesis we describe a series of stimuli-responsive polymers which could be used as diagnostic tools or as smart drug delivery systems with simultaneous diagnosis (theranostics). All hereby mentioned polymers are thermoresponsive copolymers of (N-2,2-difluoroethyl)acrylamide exhibiting lower critical solution temperature in aqueous milieu. This means that they are water-soluble at low temperature while when heated above a certain temperature, they self-assemble into nano- or macro- sized assemblies. Because of the high concentration of fluorine atoms, all these polymers could be used as 19 F MRI tracers. We designed multiple different thermoresponsive, thermo- and pH-responsive, thermo-and reactive-oxygen-species-responsive polymers that could find numerous discussed applications in human medicine. We investigated their physico-chemical properties with 1 H and 19 F nuclear magnetic resonance (NMR), size exclusion chromatography (SEC), elemental analysis, dynamic light scattering (DLS), static light scattering (SLS), small angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and turbidimetry. After the physicochemical optimization of the parameters for the selected applications, their biocompatibility was tested in vitro. Several promising polymers were tested in vivo...
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Activity of hydrolytic enzymes in process of prodution of biogas
Kolouchová, Kristýna ; Tesařová, Eva (advisor) ; Kopečný, Jan (referee)
In this work, the activities of hydrolytic enzymes, functioning in the hydrolytic stage of the production of biogas, have been determined. The activities of -amylase, -xylanase, and -glucosidase have been measured in five samples collected from the following steps of biogas production:. cow dung from the adjacent cowshed, cow manure from the homogenization tank for dosing biogas plant, digester sludge from the outside biogas fermenter, degister sludge from the inside biogas fermenter, and sludge of digestate from digestate tank. Samples for measurement of enzyme activities were provided by agricultural biogas station AGRI FAIR in Deštná, which uses for biogas production cow manure and corn silage The activities of hydrolytic enzymes in the production of biogas are crucial, because degradability of feed material is the limiting factor. Activity of a amylase had highest value in cow dung and cow manure due to food containing high levels of starch. In subsequent phases falls evenly. In the indoor digester and digestate is already depleted substrate and the activity is at zero level. Its activity is almost three times higher than - glycosidase in cow dung and cow manure, but in the last three stages of -glycosidase activity exceeds amylase and its value is nearly stable. -xylanase has...
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