|
|
Study of interaction of HA / biosklo based composites in simulated body fluid
Riša, Juraj ; Švec, Jiří (oponent) ; Bartoníčková, Eva (vedoucí práce)
This work deals with bioceramic materials based of hydroxyapatite, bioglass and their composites. These materials are commonly used in medicine, especially as hard tissue substituents. They can be prepared by different types of syntheses, from which the most common were picked for this work – precipitation of hydroxyapatite and sol-gel method for bioglass. Thermal analysis and X-ray diffraction were used for characterization of prepared powders. This thesis studies mostly their features within the composite materials, which were foamed for better bone stimulation. Properties and possibility in bio application of materials is firstly studied through their interaction in simulated body fluids, which mimics ionic concentration of human plasma. Experimental part covers synthesis of ceramic powders, their characterization, preparation of mixtures and scaffolds foamed through in situ foaming, their sintering at ideal temperatures, characterization of porosity and phase changes due to sintering. Basic tests of apatite formation ability were provided by incubation of prepared scaffolds in simulated body fluid for 3, 7, 14 and 21 days and their assay in scanning electron microscopy. Changes in concentration of Ca2+ a PO4 3- ions as well as in weight of the specimen were tracked within the incubation period.
|
|
|
Úprava laboratorních odpadních vod obsahujících chrom
Riša, Juraj ; Vomáčková, Alena (oponent) ; Pilátová, Ivana (vedoucí práce)
Tématem bakalářské práce je úprava laboratorních odpadních vod obsahujících chrom. Práce se zabývá chromem a jeho formami v odpadních vodách z anorganické laboratoře. Snaží se najít správný způsob zkoncentrování chromu a následného snížení jeho koncentrace v odpadu. Na stanovení koncentrace chromu v odpadu je použita spektrofotometrická metoda s difenylkarbazidem. Zkoncentrování chromu probíhá přímým srážením s chloridem barnatým a následující filtrací za normálního tlaku. Další částí je ekonomický efekt úpravy odpadu a porovnání samotného vývozu se zkoncentrováním.
|
|
|
Study of interaction of HA / biosklo based composites in simulated body fluid
Riša, Juraj ; Švec, Jiří (oponent) ; Bartoníčková, Eva (vedoucí práce)
This work deals with bioceramic materials based of hydroxyapatite, bioglass and their composites. These materials are commonly used in medicine, especially as hard tissue substituents. They can be prepared by different types of syntheses, from which the most common were picked for this work – precipitation of hydroxyapatite and sol-gel method for bioglass. Thermal analysis and X-ray diffraction were used for characterization of prepared powders. This thesis studies mostly their features within the composite materials, which were foamed for better bone stimulation. Properties and possibility in bio application of materials is firstly studied through their interaction in simulated body fluids, which mimics ionic concentration of human plasma. Experimental part covers synthesis of ceramic powders, their characterization, preparation of mixtures and scaffolds foamed through in situ foaming, their sintering at ideal temperatures, characterization of porosity and phase changes due to sintering. Basic tests of apatite formation ability were provided by incubation of prepared scaffolds in simulated body fluid for 3, 7, 14 and 21 days and their assay in scanning electron microscopy. Changes in concentration of Ca2+ a PO4 3- ions as well as in weight of the specimen were tracked within the incubation period.
|
|
|
Úprava laboratorních odpadních vod obsahujících chrom
Riša, Juraj ; Vomáčková, Alena (oponent) ; Pilátová, Ivana (vedoucí práce)
Tématem bakalářské práce je úprava laboratorních odpadních vod obsahujících chrom. Práce se zabývá chromem a jeho formami v odpadních vodách z anorganické laboratoře. Snaží se najít správný způsob zkoncentrování chromu a následného snížení jeho koncentrace v odpadu. Na stanovení koncentrace chromu v odpadu je použita spektrofotometrická metoda s difenylkarbazidem. Zkoncentrování chromu probíhá přímým srážením s chloridem barnatým a následující filtrací za normálního tlaku. Další částí je ekonomický efekt úpravy odpadu a porovnání samotného vývozu se zkoncentrováním.
|
host ::
RSS.