|
|
Microtextures and compositional relations in multiple grown garnet formed during subduction of crustal and mantle rocks
Kulhánek, Jan ; Faryad, Shah Wali (advisor) ; Collett, Stephen (referee) ; Konrad-Schmolke, Matthias (referee)
English abstract Studies of rocks from high- to ultrahigh-pressure metamorphic environments in subduction zones play a crucial role in advancing our understanding of Earth's dynamic processes and geodynamic evolution. Such samples, which have experienced Earth's mantle conditions, provide valuable insights into the subduction and exhumation processes associated with the tectonic collision of lithospheric plates. By analysing the mineral assemblages, textures, and chemical compositions of these rocks, we can unravel the complex history of the subducted rocks and determine the pressure-temperature paths experienced during their formation. Additionally, the investigation of high- to ultrahigh-pressure metamorphic rocks aids in constraining the mechanical behaviour of subduction zones, deciphering the fluid-rock interactions and element cycling processes. Such studies contribute to our broader understanding of plate tectonics, the formation of mountain ranges, and the geodynamic processes that shape our planet. This research focuses on the investigation of metapelitic and metabasic rocks from the Saxothuringian zone of the Bohemian Massif and the Western Gneiss Region of the Norwegian Caledonides. The studied rocks have a shared history of being part of subducted material that experienced high- to...
|
|
|
Long-term trends in water quality of pond Světin relation to fish management
Altmann, Martin ; Duras, Jindřich (advisor) ; Vrba, Jaroslav (referee)
Fishpond ecosystems provide many other services besides fish production. One of them is the retention of nutrients and thus ability to change the quality of the through flowing water, thereby ability to influence the overall quality of surface waters. In the case of the fishpond Svět in Třeboň it is also recreation, as the pond is an integral part of the tourism of the town. Water quality in the fishpond and its retention capacity of phosphorus is connected with the fish management and the inflow of nutrients from the catchment basis, especially within a cascade of ponds and densely populated or agricultural regions. This thesis evaluates seasonal (2013, 2015) and long term (2007-2015) trend of water quality of pond Svět in Třeboň in relation to fish management. Furthermore, mass balance was calculated for 2015 and estimated for 2013. The years 2015 and 2013 (the first years of production cycle) varied considerably in amount of annual rainfall. The year 2015 was extremely dry and 2013 very aqueous. Different hydrological conditions caused different seasonal courses in hydrochemistry parameters and its concentrations. The water quality of fishpond Svět is in the most of parameters better in comparison with other production fishponds in the Třeboň region and also the intensity of fish management is...
|
|
|
Hydrology of mountain seepage lakes
Kohn, Tomáš ; Stuchlík, Evžen (advisor) ; Šobr, Miroslav (referee)
The aim of this thesis is a review of the hydrological balance of mountain lakes, focusing on lakes without ground outflow, or with a huge share of seepage upon the outflow. This thesis deals, step by step, with the methods of collecting data for each input and output to the hydrological system. It is also concerned with the possibilities of monitoring ground water movement and rainfall-runoff models.
|
|
|
Efficiency of phosphorus retention in retention dams of the water reservoir Švihov
Čubová, Lenka ; Heřmanovský, Martin (advisor) ; Sychová, Petra (referee)
This work deals with mass balance of phosphorus in the forline water reservoir Švihov in Želivka river. Retention dams Němčice, Trnávka and Sedlice were built to protect the main water reservoir Švihov. Samples for determination of total phosphorus were within the water management monitoring collected and subsequently processed by laboratory staff of Prague state enterprice Vltava River. Monthly flows on inputs and outputs for each tank were obtained from limnigrafice stations. From those dates, which were provided by the state enterprise Vltava River, they were calculated by mass balance of phosphorus in individual tanks. In term of retention of efficacy of those nutrients ballasts tank is in the range 23-48% of the deposited phosphorous. Retention dams favorably influence the quality of surface water, and that transform the incoming nutrients and trap silt from the basin, which are thus not deposited in the water reservoir itself.
|
|
|
The importance of food in disease celiac sprue
Matlášková, Jana ; Faměra, Oldřich (advisor) ; Capouchová, Ivana (referee)
The celiac sprue is an autoimmune disease that affects 1% of the population. The disease is dependent on several factors. One of this factors is a genetic predisposition, which is related to the genome HLA-DQ2 and DQ8. It also depends on the environment - the period of breastfeeding, the period of inclusion the gluten into the diet, and also taking antibiotics. These factors include gluten itself, which works as a trigger of the celiac sprue disease. The gluten is composed of two protein components of prolamin and glutelin. It is contained in wheat, barley, rye, oat and in their hybrids. It appears at creation of paste. If a patient with the celiac sprue disease eats gluten, his autoimmune system doesn´t respond correctly and it starts attacking its own cells, because it´s unable to recognize the difference between its own and foreign cells.
The symptoms of the celiac sprue disease include intestinal problems (diarrhea, abdominal pain), osteoporosis, anemia etc. It is also related to some of the autoimmune diseases such as diabetes mellitus I or dermatitis herpetiformis. Some patients are difficult to diagnose because they don´t have any of these symptoms. Celiac disease leads to the villi in the small intestine damage. The villi may completely disappear when the disease is not long-term treated.
A gluten-free diet is the only way how to treat this disease. It means that a person with the celiac sprue diagnosis has to eliminate from the diet all foodstuffs that contain risk proteins. First of all it is wheat, rye, barely and oats. Gluten may be hidden in some foods and therefore each package must contain allergens used in the product. The product can be labeled as gluten-free only if the amount of gluten is to 20 mg/kg of food. These products are symbolized by a crossed-out grain. People with celiac disease most use the products made by rice, maize, millet and pseudocereals, because they´re gluten-free. This diet is lifelong and needed, because each offense may affect the health of the patient.
|
guest ::
