|
|
Gas Boiler - 220 t/h
Flodr, Jan ; Ryšavý, Milan (referee) ; Skála, Zdeněk (advisor)
For set parameters of a steam and a boiler feed water is designed a thermal and dimensional plan of the boiler, allowing high efficient requests. A boiler is used for combustion of blast furnace gas contains 10% of a natural gas used as a stabilisation element.
|
|
|
Fireplace Inserts
Ptáček, Martin ; Štelcl, Otakar (referee) ; Fiedler, Jan (advisor)
The goal of this thesis is examination of automatic controller in various operating modes on fireplace inlay Venus 12.1.W. The work compares few measurement, always with measurment without automatic controller In this measurements are evaluated the emissions of CO, CO2, oxygen content in the flue duct gasses and the temperature in the flue duct are listed here and the efficiency is calculated for different operating modes. Conclusion contains overall summary of this thesis. At the end there is a search of manufacturers not only in Czech Republic
|
|
|
Effect of species composition change of forests on the quality of litter and derived soil organic matter
Roblíková, Věra ; Jandová, Kateřina (advisor) ; Bartuška, Martin (referee)
Climate change will alter the species composition of forests, which will cause changes in litter amounts and quality and potentially affect the carbon content and its stability in forest soils. With the knowledge of inputs to the biogeochemical carbon cycle, we can design methods of forest management and effectively mitigate climate change with forest cover. The aim of this thesis is to summarize information about i) change in species composition of temperate forests in Europe and the Czech Republic, ii) differences in litter amount and quality, iii) effect of litter quality on the stability of carbon in soils. I propose a master's thesis with an observational and experimental investigation of forest species change's effect on carbon content in soils. Climate change will shift species ranges northward and to higher altitudes. While species do not differ in the production of above-ground litter, they differ in the quality of above-ground litter and the quantity and quality of below-ground litter. The rate of decomposition is affected by the litter quality of tree species. Through their effect on the fauna, tree species affect the amount of carbon stored in the mineral horizon. However, the effect of litter quality on carbon stability in mineral horizons is unknown, in terms of both the density fractions of...
|
|
|
Determination of the stoichiometry of the copper complexes with dehydrosilybine A
Klimková, Kateřina ; Mladěnka, Přemysl (advisor) ; Hrdina, Radomír (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Candidate: Kateřina Klimková Supervisor: Assoc. Prof. Přemysl Mladěnka, Pharm. D., Ph.D. Consultant: Assoc. Prof. Kateřina Valentová, Ph.D. Title of Thesis: Determination of the stoichiometry of the copper complexes with dehydrosilybin A Silymarin, the standardized extract of the milk thistle (Silybum marianum), is a widely used approved over-the-counter drug that is recommended for a number of liver diseases. Silymarin contains as one of its components 2,3-dehydrosilybinA, which has an appropriate metal binding site in its structure. In general, flavonolignans, due to their structure, can interact with transition metals in the gastrointestinal tract by forming complexes. This property can be useful for the protection against excessive amounts of metals in the body. The aim of this in vitro study was to analyse the interaction of 2,3-dehydrosilybin A with copper, which plays a crucial role in the organism as a cofactor of many enzymes. Although being an essential element, it can, however, be toxic at elevated levels. Stoichiometry, as one of the most important characteristics of the complex, was determined by UV-Vis spectrophotometry in four (patho)physiological pH conditions (4.5; 5.5; 6.8; 7.5)...
|
|
|
Diet quality impact on growth and survival of freshwater zooplankton species
Sýkorová, Veronika ; Sacherová, Veronika (advisor) ; Nedbalová, Linda (referee)
Food quality has a significant influence on freshwater zooplankon. It influences its growth rate and development generally. By quality we understand a certain stoichiometric ratio of the main biogenic elements (carbon, nitrogen, phosphorus) in the biomass of food. Ecological stechiometry is helping to understand the balance of chemical elements in ecological interactions and processes. Freshwater zooplankton consists mostly of two groups of organisms: rotifers (Rotifera) and crustaceans (Crustacea) - cladocerans (Cladocera) and copepods (Copepoda). Each of this groups requires different quality of food. Most of filtering cladocerans are fast- growing organisms, which need a phosphorus-rich food for their fast development (small C:P ratio in food) and vice versa for most of the copepods. The food offered is not always ideal for all members of zooplankton, that is why various pre- and post- absorptional mechanisms developed to help them to cope with unsuitable food. The ability to survive unvafourable conditions is closely linked to the zoolpankton's reactions to unsuitable C:N:P ratio in its food. The C:N:P ratio in food of zooplankton also influences the species distribution in water bodies. Key words: stoichiometry, food quality, zooplankton
|
|
|
Determination of the stoichiometry of the copper complexes with dehydrosilybine A
Klimková, Kateřina ; Mladěnka, Přemysl (advisor) ; Hrdina, Radomír (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Candidate: Kateřina Klimková Supervisor: Assoc. Prof. Přemysl Mladěnka, Pharm. D., Ph.D. Consultant: Assoc. Prof. Kateřina Valentová, Ph.D. Title of Thesis: Determination of the stoichiometry of the copper complexes with dehydrosilybin A Silymarin, the standardized extract of the milk thistle (Silybum marianum), is a widely used approved over-the-counter drug that is recommended for a number of liver diseases. Silymarin contains as one of its components 2,3-dehydrosilybinA, which has an appropriate metal binding site in its structure. In general, flavonolignans, due to their structure, can interact with transition metals in the gastrointestinal tract by forming complexes. This property can be useful for the protection against excessive amounts of metals in the body. The aim of this in vitro study was to analyse the interaction of 2,3-dehydrosilybin A with copper, which plays a crucial role in the organism as a cofactor of many enzymes. Although being an essential element, it can, however, be toxic at elevated levels. Stoichiometry, as one of the most important characteristics of the complex, was determined by UV-Vis spectrophotometry in four (patho)physiological pH conditions (4.5; 5.5; 6.8; 7.5)...
|
|
|
Intraspecific variability in seeds nutrient stoichiometry
Kesl, Tomáš ; Mašková, Tereza (advisor) ; Konečná, Marie (referee)
Immediately after germination, the plants depend on the nutrients stored in the seed from which they germinated, until the nutrient intake is completely replaced by the mature leaves and roots. Nutrients in seeds are important for early development of vegetative organs. Their content and concentration in seeds can be influenced by various factors such as nutrient availability in soil, latitude, temperature, photoperiod, granivory and competition. This bachelor's thesis summarizes current knowledge about intraspecific and interspecific variability of seed nutrient stoichiometry, specifically nitrogen, phosphorus and carbon, as they most often limit plant growth. For all three elements, common and different trends can be observed, both at the intra-species and inter-species level. The only trend comparable between the intra-species and inter-species level is correlation of carbon seed concentration and latitude, while at the inter-species level there is also the opposite trend of negative correlation of latitude and carbon concentration in seeds. Other observed trends are not comparable between the intra-species and inter-species level. It is not possible to compare these trends, as there is lack of studies on the variability of seed nutrient stoichiometry. Therefore it is necessary to focus on seed...
|
|
|
Gas Boiler - 220 t/h
Flodr, Jan ; Ryšavý, Milan (referee) ; Skála, Zdeněk (advisor)
For set parameters of a steam and a boiler feed water is designed a thermal and dimensional plan of the boiler, allowing high efficient requests. A boiler is used for combustion of blast furnace gas contains 10% of a natural gas used as a stabilisation element.
|
|
|
Determination of the stoichiometry of the copper complexes with dehydrosilybine A
Klimková, Kateřina ; Mladěnka, Přemysl (advisor) ; Hrdina, Radomír (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Candidate: Kateřina Klimková Supervisor: Assoc. Prof. Přemysl Mladěnka, Pharm. D., Ph.D. Consultant: Assoc. Prof. Kateřina Valentová, Ph.D. Title of Thesis: Determination of the stoichiometry of the copper complexes with dehydrosilybin A Silymarin, the standardized extract of the milk thistle (Silybum marianum), is a widely used approved over-the-counter drug that is recommended for a number of liver diseases. Silymarin contains as one of its components 2,3-dehydrosilybinA, which has an appropriate metal binding site in its structure. In general, flavonolignans, due to their structure, can interact with transition metals in the gastrointestinal tract by forming complexes. This property can be useful for the protection against excessive amounts of metals in the body. The aim of this in vitro study was to analyse the interaction of 2,3-dehydrosilybin A with copper, which plays a crucial role in the organism as a cofactor of many enzymes. Although being an essential element, it can, however, be toxic at elevated levels. Stoichiometry, as one of the most important characteristics of the complex, was determined by UV-Vis spectrophotometry in four (patho)physiological pH conditions (4.5; 5.5; 6.8; 7.5)...
|
|
|
Digestate Grate Boiler
Krejčiřík, Jiří ; Milčák, Pavel (referee) ; Lisý, Martin (advisor)
This master thesis deals with the properties of digestate in combustion, design of construction solution of digestate boiler and experimental verification of boiler parameters. The first chapter deals with the properties of digestate as a fuel. It is followed by a chapter dealing with the existing measured results on a similar boiler. This is followed by a stoichiometric calculation of the digestate boiler. The next chapter is devoted to combustion chamber models. This chapter is followed by a chapter with experimental verification of chamber models and combustion process tuning. The last chapter contains design of construction and operational measures.
|
guest ::
