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Derivatization of Sodium Hyaluronate as a Possible Tool for Increasing of the Stability of Model Artificial Synovial Fluid
Hrochová, Eliška ; Mravec, Filip (referee) ; Kalina, Michal (advisor)
This master thesis deals with the optimization of the procedure of modification of hyaluronic acid structure for the use in the artificial synovial liquids. Based on the literature research, the amino acid alanine was used for the modification of carboxylic group in the glucuronic acid. The main subject of study is the improvement of the stability and mechanical properties of synovial liquid. DLS microrheology, macrorheology, thermogravimetric analysis (TGA), multi-angle light scattering with flow-field flow fractionation (AF4-MALS) and infrared spectroscopy (FTIR) were used for characterization. The theoretical part of this theses submits review of the musculoskeletal system, role of hyaluronic acid in metabolism and summary of synovial liquid. The experimental part focuses on the measurement of the stability and mechanical properties of three artificial samples (first with no modification, second with modified hyaluronic acid and third with modified hyaluronic acid and chondroitin sulphate). These samples were compared with real horse synovial fluid and artificial viscosupplement Orthovisc®.
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Preparation and Characterization of Mechanical Properties of Artificial Synovial Liquids
Hrochová, Eliška ; Sedláček, Petr (referee) ; Kalina, Michal (advisor)
This bachelor thesis deals with the optimization of preparation of artificial synovial liquids. The main subjects of study are the mechanical properties of real and artificial synovial fluid samples. DLS microrheology, thermogravimetric analysis (TGA) and infrared spectroscopy (FTIR) were used for characterization. The theoretical part of this thesis is represented by a literature research of a methods of preparation of artificial synovia and summary of definitions of rheological terms. The experimental part focuses on the preparation and characterization of the artificial synovial liquids originating from the published patent US 8716204. In the framework of the bachelor thesis, this preparation was optimized in several partial steps (method of dispersion of components, choice of molecular weight of hyaluronic acid, nature and ionic strength of used dispersion medium). The prepared optimized sample of synovial fluid was in following experimental characterization steps compared in terms of material characteristics and mechanical properties with the real horse synovial fluid sample. By modifying the process based on the aforementioned patent, an artificial synovial fluid could be formed. That meets the viscoelastic nature of the real matrix and that is stable over time.
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Derivatization of Sodium Hyaluronate as a Possible Tool for Increasing of the Stability of Model Artificial Synovial Fluid
Hrochová, Eliška ; Mravec, Filip (referee) ; Kalina, Michal (advisor)
This master thesis deals with the optimization of the procedure of modification of hyaluronic acid structure for the use in the artificial synovial liquids. Based on the literature research, the amino acid alanine was used for the modification of carboxylic group in the glucuronic acid. The main subject of study is the improvement of the stability and mechanical properties of synovial liquid. DLS microrheology, macrorheology, thermogravimetric analysis (TGA), multi-angle light scattering with flow-field flow fractionation (AF4-MALS) and infrared spectroscopy (FTIR) were used for characterization. The theoretical part of this theses submits review of the musculoskeletal system, role of hyaluronic acid in metabolism and summary of synovial liquid. The experimental part focuses on the measurement of the stability and mechanical properties of three artificial samples (first with no modification, second with modified hyaluronic acid and third with modified hyaluronic acid and chondroitin sulphate). These samples were compared with real horse synovial fluid and artificial viscosupplement Orthovisc®.
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Preparation and Characterization of Mechanical Properties of Artificial Synovial Liquids
Hrochová, Eliška ; Sedláček, Petr (referee) ; Kalina, Michal (advisor)
This bachelor thesis deals with the optimization of preparation of artificial synovial liquids. The main subjects of study are the mechanical properties of real and artificial synovial fluid samples. DLS microrheology, thermogravimetric analysis (TGA) and infrared spectroscopy (FTIR) were used for characterization. The theoretical part of this thesis is represented by a literature research of a methods of preparation of artificial synovia and summary of definitions of rheological terms. The experimental part focuses on the preparation and characterization of the artificial synovial liquids originating from the published patent US 8716204. In the framework of the bachelor thesis, this preparation was optimized in several partial steps (method of dispersion of components, choice of molecular weight of hyaluronic acid, nature and ionic strength of used dispersion medium). The prepared optimized sample of synovial fluid was in following experimental characterization steps compared in terms of material characteristics and mechanical properties with the real horse synovial fluid sample. By modifying the process based on the aforementioned patent, an artificial synovial fluid could be formed. That meets the viscoelastic nature of the real matrix and that is stable over time.
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Chinese environmental policy and the factors of its dynamics
Hrochová, Eliška ; Druláková, Radka (advisor) ; Havlová, Radka (referee)
Chinese environmental policy has been going through transition since 2006. This shift has been represented in investments in renewable energy, energy efficiency and control of pollution. The theses tries to find out the factors of this dynamics through an analysis of potential influences. It comes to an conlusion that the shit in chinese policy has been driven mainly by its domestic issues, whereas the impact of the external milieu has been present but limited.
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