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Hyaluronan-albumin system dynamics
Jarábková, Sabína ; Smilek, Jiří (referee) ; Chytil, Martin (advisor)
The bachelor thesis deals with the hyaluronan and albumin system dynamics. In this study was to use these methods: interfacial rheology, tensiometry, method of maximum pressure in the bubble and UV-VIS spectrophotometry. The measurements were used with various concentrations of albumin and a constant concentration of hyaluronan( high molecular and low molecular too) and then conversely. All solutions were measured and the obtained data were compared with the results of BSA in buffer without HA. Solutions were prepared with citrate-phosphate buffer of pH about 4. Were observed interaction between HA and BSA.
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Hydrogels based on cationic polyelectrolytes
Jarábková, Sabína ; Lehocký,, Marián (referee) ; Pekař, Miloslav (advisor)
This diploma thesis deals with the study of physical hydrogels based on positively-charged polyelectrolyte. The study is to investigate the interaction of selected positively-charged polyelectrolytes with oppositely charged surfactants in water and in physiologicla saline solution (0.15 M NaCl). The influence of the process for preparing hydrogels. Hydrogels were prepared by dry or wet. Were tested solubilization abilities hydrogels prepared using the hydrophobic dye oil red O were also measured rheological properties of the hydrogels prepared using frequency oscillatory tests and flow tests, depending on the concentration of the polymer or surfactant. For the rheological experiments suggest that chitosan is capable of forming rigid hydrogels with better mechanical properties than the dextran in the presence of both surfactants. Selected samples were also carried out experiments using fluorescent sold prodan, nile red and -naphthol as fluorescent probes. And in selected experiments was determined by solids content in percentage depending on the concentration used polyelectrolytes or surfactants.
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Time-temperature superposition principle used for study of rheological properties of polymer materials
Kadlec, Martin ; Jarábková, Sabína (referee) ; Smilek, Jiří (advisor)
This bachelor thesis provides a study of the “time-temperature superposition” principle and its applicability to hydrogels. According to current research, honey was chosen due to its simple viscoelastic properties (Newtonian liquid) as a suitable material for optimalization procedure. The knowledge obtained during optimization was further applied to real hydrogel materials, namely the agarose gel was selected as an example of thermoreversible hydrogel, as well as the hyaluronan and dextran gels as examples of hydrogels formed by the interaction of the polyelectrolyte with the opposite charged surfactant. By using the “time-temperature superposition” principle, a considerable increase in the range of the observed oscillation frequencies was achieved for all chosen samples, which led to gain of information about storage and loss or complex modulus, which could not be achieved by classical oscillatory test. Although master curves were generated for all the samples examined, curves for storage and loss modulus could be created separately only for hydrogels formed by the interaction of the polyelectrolyte with the opposite charged surfactant. For this reason, this group of hydrogels appears to be more suitable materials for the application of the “time-temperature superposition” principle.
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Business Plan Proposal for a Selected Company
Jarábková, Sabína ; MBA, Pavel Indruch, (referee) ; Konečná, Zdeňka (advisor)
The main aim of this diploma thesis was compiling a draft business plan for the establishment and further development of the chosen company. It was chosen a franchise concept with fashion clothing. The first part of this work focuses on theoretical knowledge on the matter, which were subsequently used in other parts of practical work. The analytical part is focused on analysis of the environment (external and internal), choosing a suitable location for the business plan and the conditions franchise concept. The actual business plan is then compiled in the design of the work, with an emphasis on the financial aspects of the project.
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Time-temperature superposition principle used for study of rheological properties of polymer materials
Kadlec, Martin ; Jarábková, Sabína (referee) ; Smilek, Jiří (advisor)
This bachelor thesis provides a study of the “time-temperature superposition” principle and its applicability to hydrogels. According to current research, honey was chosen due to its simple viscoelastic properties (Newtonian liquid) as a suitable material for optimalization procedure. The knowledge obtained during optimization was further applied to real hydrogel materials, namely the agarose gel was selected as an example of thermoreversible hydrogel, as well as the hyaluronan and dextran gels as examples of hydrogels formed by the interaction of the polyelectrolyte with the opposite charged surfactant. By using the “time-temperature superposition” principle, a considerable increase in the range of the observed oscillation frequencies was achieved for all chosen samples, which led to gain of information about storage and loss or complex modulus, which could not be achieved by classical oscillatory test. Although master curves were generated for all the samples examined, curves for storage and loss modulus could be created separately only for hydrogels formed by the interaction of the polyelectrolyte with the opposite charged surfactant. For this reason, this group of hydrogels appears to be more suitable materials for the application of the “time-temperature superposition” principle.
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Business Plan Proposal for a Selected Company
Jarábková, Sabína ; MBA, Pavel Indruch, (referee) ; Konečná, Zdeňka (advisor)
The main aim of this diploma thesis was compiling a draft business plan for the establishment and further development of the chosen company. It was chosen a franchise concept with fashion clothing. The first part of this work focuses on theoretical knowledge on the matter, which were subsequently used in other parts of practical work. The analytical part is focused on analysis of the environment (external and internal), choosing a suitable location for the business plan and the conditions franchise concept. The actual business plan is then compiled in the design of the work, with an emphasis on the financial aspects of the project.
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Hydrogels based on cationic polyelectrolytes
Jarábková, Sabína ; Lehocký,, Marián (referee) ; Pekař, Miloslav (advisor)
This diploma thesis deals with the study of physical hydrogels based on positively-charged polyelectrolyte. The study is to investigate the interaction of selected positively-charged polyelectrolytes with oppositely charged surfactants in water and in physiologicla saline solution (0.15 M NaCl). The influence of the process for preparing hydrogels. Hydrogels were prepared by dry or wet. Were tested solubilization abilities hydrogels prepared using the hydrophobic dye oil red O were also measured rheological properties of the hydrogels prepared using frequency oscillatory tests and flow tests, depending on the concentration of the polymer or surfactant. For the rheological experiments suggest that chitosan is capable of forming rigid hydrogels with better mechanical properties than the dextran in the presence of both surfactants. Selected samples were also carried out experiments using fluorescent sold prodan, nile red and -naphthol as fluorescent probes. And in selected experiments was determined by solids content in percentage depending on the concentration used polyelectrolytes or surfactants.
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Hyaluronan-albumin system dynamics
Jarábková, Sabína ; Smilek, Jiří (referee) ; Chytil, Martin (advisor)
The bachelor thesis deals with the hyaluronan and albumin system dynamics. In this study was to use these methods: interfacial rheology, tensiometry, method of maximum pressure in the bubble and UV-VIS spectrophotometry. The measurements were used with various concentrations of albumin and a constant concentration of hyaluronan( high molecular and low molecular too) and then conversely. All solutions were measured and the obtained data were compared with the results of BSA in buffer without HA. Solutions were prepared with citrate-phosphate buffer of pH about 4. Were observed interaction between HA and BSA.
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