National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Atomization of bismuthane in two flame atomizers for atomic fluorescence spectrometry
Štádlerová, Barbora ; Kolrosová, Marta ; Dědina, Jiří ; Musil, Stanislav
Atomization of bismuthane in the minature diffusion flame and the flame-in-gas-shield atomizer by hydride generation coupled with atomic fluorescence spectrometry.
Hydride generation of bismuth for atomic absorption and fluorescence spectrometry.
Kolrosová, Marta ; Musil, Stanislav (advisor) ; Nováková, Eliška (referee)
This master's thesis deals with the optimization of conditions of chemical hydride generation (HG) of bismuth, its atomization and detection by atomic absorption spectrometry (AAS) and atomic fluorescence spectrometry (AFS). Two types of atomizers were used for atomization of volatile species, a miniature diffusion flame for AAS as well as for AFS and a flame-in-gas-shield atomizer for AFS. At first, the parameters of HG in a flow injection mode were optimized - the concentration of hydrochloric acid, the concentration of sodium borohydride and the volume of the reaction coil. Subsequently, the atomization conditions were optimized using both atomizers. The parameters optimized were hydrogen fraction, total gas flow rate and observation height. Due to the more complicated construction of the FIGS atomizer, more parameters were studied, such as the oxygen flow rate through the capillary and the flow rate of shielding argon required for shielding the free atoms. A special part of the thesis dealt with the optimization of the optical path of the atomic fluorescence spectrometer, the selection of an interference filter and the optimization of a power supply of an electrodeless discharge lamp. It was found that under optimum conditions of generation, atomization and detection excellent detection limits...
Proteomic study of the dentin-enamel junction layer.
Kolrosová, Marta ; Jágr, Michal (advisor) ; Ergang, Peter (referee)
This thesis deals with the analysis of the dentin-enamel junction layer in human third molar teeth. Three different methods of analysis were tested. In the first one teeth were demineralized in EDTA buffer to release the protein layer DEJ. In the other two cases thin slils of dental tissue were preparedand from them the DEJ layer was cut using laser microdissection. Severals methods were tested for extraction of proteins from DEJ samples (for comparsio also from dentin and enamel samples). Extracted proteins were cleavaged into peptides with trypsin. Subsequently, peptides were purified by Stage tips and analyzed by nLC MS/ MS. Using the optimal method over 40 different proteins, for example: apolipoproteins, vimentin, vitronectin, clusterin, biglycan weres found in the sample DEJ. Keywords: proteomics, dentin-enamel junction, laser microdissection, mass spectrometry

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