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Possibilities of determination of metalocompounds present in living systems
Hauerlandová, Petra ; Zemanová, Jana (referee) ; Vitoulová, Eva (advisor)
This bachelor thesis deals with the topic of metallomics. There are explained basic concepts and definitions, differences between the metal-binding proteins and metalloproteins. This thesis also deals with metallothioneins and theirs basic types. The study describes possible interactions of metals and organic compounds. Attention is paid to interactions between metals and peptides or proteins. There are given examples of some essential metals, which are linked to important organic compounds, which are necessary for the proper function of the organism. Mainly there are described enzymes necessary for the human body. There are also referred organic compounds of toxic metals. Another part of the thesis is devoted to analytical methods used for determination of metallocompounds. There are described methods for separation and detection, which are combined for qualification and quantification of metallocompounds. There are referred examples of the determination of some metallocompounds.
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Analysis of elements in nutrition supplements
Motlová, Tereza ; Navrátilová, Jana (referee) ; Vitoulová, Eva (advisor)
This bachelor thesis deals with food supplements, mineral elements and their determination in dietary supplements. The aim of this thesis was to elaborate a literature review focused on the food supplements, mineral elements, which are used in food supplements, and methods for determination of mineral elements in nutrition supplements. Forepart of this bachelor treats of food supplements, their basic categories, mineral elements which are contained in nutrition supplements and their effects in case of their oversupply (at high doses) or lack (at low concentrations) in a human body. Other part of this thesis is concerned with options of mineral elements determination in food supplements. Thereinafter, the thesis deals with ways of preparing samples for determination and analytical methods which are used for determination of mineral elements in nutrition supplements. Food supplements are foodstuffs which serve to direct consumption. Supplements differ from casually foodstuffs by high contents of vitamins, mineral elements and others matters which have nutrition and physiological effect. Food supplements are manufactured in order to achieve a diet completion of common user with positive impact on human health.
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Methodology for determining the chemical composition of water glasses
Flídrová, Michaela ; Bartoníčková, Eva (referee) ; Kalina, Lukáš (advisor)
The bachelor thesis deals with the methodology of determination of the chemical composition of water glasses. The aim was to find a more suitable method than the colorimetric analysis used by one of the domestic water glass manufacturers. The current procedure can be used to determine the content of Me2O (Na2O, K2O, Li2O), however, in the determination of SiO2 the method is inaccurate since the color change of the indicator during the second titration is very slow and therefore the equivalence point is ambiguous. The main aim of this work was to find a suitable method for the complex determination of the chemical composition of water glasses, which is compared with other methods used in the analytical chemistry of silicate materials. A very promising method is the conductometric titration with a volumetric hydrochloric acid solution, which provides an accurate, fast and instrumentally inexpensive method of chemical determination.
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Advanced Magnesium Alloys Surface Modification by Ni-P Based Coatings
Kosár, Petr ; Pacal, Bohumil (referee) ; Nový,, František (referee) ; Havlica, Jaromír (advisor)
The dissertation thesis deals with the modification of the surface of advanced magnesium alloys with Ni-P based coatings. At the beginning of the theoretical part, the structures of the used magnesium alloys and the influence of individual alloying elements on their properties are characterized. In the following part of the thesis the current knowledge in the field of electroless deposition on metal substrates is summarized. The theoretical part of the thesis is closed with contemporary research study in the field of clarification and determination of possible mechanism of electroless deposition. For the subsequent investigation of the mechanism of electroless deposition on magnesium alloys, it was necessary to characterize the microstructure and composition of individual magnesium alloys in the first phase of the experimental part. The exact composition of elements was determined using glow discharge optical emission spectroscopy and scanning electron microscopy with EDS was used for composition of phases of magnesium alloys. Using scanning electron microscopy and detailed elemental analysis of the coated magnesium substrate, it was found that for optimal Ni-P coating deposition on magnesium alloys, acid pickling prior coating is required in a mixture of acetic acid and sodium nitrate. Using the XPS method, it was found that the phosphorus atom in the sodium dihydride-diphosphate reducing agent has a + V charge. 4 At the end of the experimental part scanning electron microscopy and detailed elemental analyses were used for monitoring of the Ni-P particles nucleation and growth in the first 120 seconds of the coating process.
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Analysis of the Selected Company by the Selective Methods
Volková, Ludmila ; Tihlařík, Michal (referee) ; Hanušová, Helena (advisor)
This master´s thesis is focused on analysis of the company which is situated in the pro-duction of plastic windows and profile systems. Analysis of the actual state is made through the analysis of the inner and outer environment, financial situaction is estimated with the Kralicek Quick Test. Thesis includes suggestions and recommendations which will cause improvement of the situation at general in following years.
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Schim Valve of Hydraulic Suspension Damper
Reisch, Martin ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This bachelor thesis is focusing on the problem of the shim valve in a hydraulic suspension damper, its pressure drops and the effect of different modifications of the valve on the properties of the complete damper. In the first part, an overview of the shim assemblies used on the shim valve is made and the influence of the different assemblies on the damping properties of the shock absorber is described. The effect of the different parameters of the shims (thickness, radius, position) on the overall stiffness of the shim assembly is described. In the next section, an overview of analytical models for the calculation of stiffness and pressure drops on the shim valve is developed and a FEM methodology for the calculation of valve stiffness is established. All computational methods are compared with measured data on a real damper throughout the paper.
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Vertical gradients of atmospheric aerosols chemical composition
Kovářík, Jiří
The aim of this work is to obtain data on the chemical composition of aerosols at two heights (4–5 metres above ground and at 230 metres on the atmospheric tower’s measurement platform). The following and sampling techniques will be used: Aerosol Mass\nSpectrometry) – in combination with PMF (Positive Matrix Factorisation), Aerosol Chemical Speciation Monitor and Particle Into Liquid Sampler coupled with Ion Chromatography.
Plný tet:  PDF
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Methods of provenance determination of marbles
Dontová, Kateřina ; Přikryl, Richard (advisor) ; Kuchařová, Aneta (referee)
Determination of provenance of marble from sculptures or architecture, which make part of our cultural heritage, make some of the principal goals of material investigation of artefact and/or archaeological findings. Light-coloured marbles used in antiquity are amongst the most studied types of natural stone. Various methods and approaches, employed for marble provenance, rank to the most developer. Moreover, antique marbles take advantage of having the largest datasets for provenance determination. This bachelor thesis focuses on the review of the main scientific methods which have been used for marble provenance studies during past 130 years. Mineralogical-petrographic description together with thin-section microscopy makes the basis of such studies. Traditional qualitative description has evolved into more precise quantitative study with the help of computer-based image analysis methods allowing for obtaining sound quantitative data (grains size, grain shape etc.). After-2WW period is characterised by adoption of various analytical methods, which employ different chemical characteristics of marbles. Along with trace elements studies (e.g. by INAA, LA-IC-MS), most of the recently used analytical methods focus on the C and O stable isotopes. Each of the methods has also some limitations, therefore...
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Methodology for determining the chemical composition of water glasses
Flídrová, Michaela ; Bartoníčková, Eva (referee) ; Kalina, Lukáš (advisor)
The bachelor thesis deals with the methodology of determination of the chemical composition of water glasses. The aim was to find a more suitable method than the colorimetric analysis used by one of the domestic water glass manufacturers. The current procedure can be used to determine the content of Me2O (Na2O, K2O, Li2O), however, in the determination of SiO2 the method is inaccurate since the color change of the indicator during the second titration is very slow and therefore the equivalence point is ambiguous. The main aim of this work was to find a suitable method for the complex determination of the chemical composition of water glasses, which is compared with other methods used in the analytical chemistry of silicate materials. A very promising method is the conductometric titration with a volumetric hydrochloric acid solution, which provides an accurate, fast and instrumentally inexpensive method of chemical determination.
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