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Comparison of different types of commercial lithium-ion batteries and their properties under low temperature
Bičák, Tomáš ; Máca, Josef (referee) ; Libich, Jiří (advisor)
The diploma thesis deals with the issue of lithium-ion batteries. Describes development, technologies and materials used. The diploma thesis describes the operating principle, characteristics, advantages and disadvantages. The work is focused on the characteristic properties of commercial lithium-ion batteries under standard conditions and at reduced temperatures. At reduced temperatures, changes in properties due to low temperatures are observed. Furthermore, in this work they compare the measured values with the values given by the manufacturers.
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Very low temperature measurement
Mráz, Dominik ; Harabiš, Vratislav (referee) ; Chmelař, Milan (advisor)
This bachelor thesis is focused on low temperature measurement, respectively on temperature sensors classsification, their accuracy, temperature range and linearity. It deals especially in use of these sensors in cryogenic applications. It contains temperature sensor block diagram, including the description of each block. It also contains schematic designs with description of each design’s function, components and the reason why it’s used. Additionally the realization of the temperature sensor is described and it’s testing.
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Design of a Non-Resonant General Purpose Sample Holder for Terahertz Electron Paramagnetic Resonance Spectroscopy
Martínek, Tomáš ; Sojka, Zbigniew (referee) ; Neugebauer, Petr (advisor)
Cílem diplomové práce je navrhnout konstrukční řešení držáků vzorků pro vysokofrekvenční elektron paramagnetickou resonanci. Předmětem návrhu je vytvořit jednoduchý zamykací systém pro spojování mikrovlnného vlnovodu a držáku vzorku. Dále navrhnout systém s řešením držáku pro více vzorků. Toto unikátní provedení držáku povede k několikanásobné úspoře celkového času měření vzorků. Poslední návrh spočívá v optimalizaci držáku vzorku s možností naklápění osy, kterou lze díky přímému napojení na piezoelektrický rotátor pootáčet s přesností na miliradiány. Oba typy držáku vzorku jsou navrženy s ohledem na automatizaci měření.
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Very low temperature measurement (to -160 of degrees Celsius)
Vlček, Josef ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
his semestral thesis deals with measurement of low temperatures (down to -160 degrees Celsius). This thesis describes basics of cryotherapy and its practical implementation. It also deals with different types of temperature sensors which means theoretical description of their work, thein advantages and disadvantages. The main goal is to put a recommendation of which of this sensors is the most suitable for practical implementation of the thermometer.
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Jak rostliny vnímají chlad: omická analýza
Karšulinová, Daniela
Plants of temperate zones have developed a sophisticated mechanism that helps them cope with freezing conditions. This process is called cold acclimation. From an agronomical point of view, comprehending this process is necessary to ensure crop yield and quality. This thesis entitled: "Jak rostliny vnímají chlad: omická analýza" describes the molecular mechanism behind the cold acclimation process, specifically the role of light and selected photoreceptors in this process. In the experimental part of the thesis, a mutant line (UVR8 line12-monomer) of model organism Arabidopsis thaliana, which has a partially activated signaling of the UV-B, and the control line (Ws-4) were used. These lines were exposed to cold and UV-B radiation to further study the interaction of the cold signaling pathway and UV-B radiation signaling. LC-MS profiling identified more than 6000 proteins, of which 3472 significantly changed their abundance. Moreover, lipidome analysis was performed using TLC Proteomic analysis revealed an increased abundance of proteins involved in biosynthesis of jasmonic acid. Based on this, a validation experiment with exogenous application of methyl jasmonic acid was performed.
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Comparison of different types of commercial lithium-ion batteries and their properties under low temperature
Bičák, Tomáš ; Máca, Josef (referee) ; Libich, Jiří (advisor)
The diploma thesis deals with the issue of lithium-ion batteries. Describes development, technologies and materials used. The diploma thesis describes the operating principle, characteristics, advantages and disadvantages. The work is focused on the characteristic properties of commercial lithium-ion batteries under standard conditions and at reduced temperatures. At reduced temperatures, changes in properties due to low temperatures are observed. Furthermore, in this work they compare the measured values with the values given by the manufacturers.
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Design of a Non-Resonant General Purpose Sample Holder for Terahertz Electron Paramagnetic Resonance Spectroscopy
Martínek, Tomáš ; Sojka, Zbigniew (referee) ; Neugebauer, Petr (advisor)
Cílem diplomové práce je navrhnout konstrukční řešení držáků vzorků pro vysokofrekvenční elektron paramagnetickou resonanci. Předmětem návrhu je vytvořit jednoduchý zamykací systém pro spojování mikrovlnného vlnovodu a držáku vzorku. Dále navrhnout systém s řešením držáku pro více vzorků. Toto unikátní provedení držáku povede k několikanásobné úspoře celkového času měření vzorků. Poslední návrh spočívá v optimalizaci držáku vzorku s možností naklápění osy, kterou lze díky přímému napojení na piezoelektrický rotátor pootáčet s přesností na miliradiány. Oba typy držáku vzorku jsou navrženy s ohledem na automatizaci měření.
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Use of anti-stress agents to minimize the consequences of stressors on the production of Horticultural Crops
Nosálková, Monika ; Hnilička, František (advisor) ; Dana, Dana (referee)
The objective of the thesis is to research the physiological differences between picked genotypes of Capsicum annuum and the effect of lower temperatures in the beginning of ontogeny. Another objective is to find out how Capsicum annuum plants react to application of anti-stress agent Atonic and to determine the most appropriate physiological indicators of resistence to low temperatures.
Capsicum annuum ranks among thermophilic crops for which the temperature optimum is of 22 - 25 °C during the day and 18 - 20 °C overnight. They are planted at the field station at the time when ground frost may occur. These can cause physiological changes in the plant or even cause her death.
Three varieties were chosen for the experiment: Amy, Eva a Lydia. Plants were divided into a control group and treatment group. Both groups were further divided into two additional groups - with and without the application of Atonic in the beginning of vegetative growth (6th day of exposure to stress). Control group plants were grown at 20 °C and stressed plants were moved into a klimabox with temperature of 5 °C throughout the entire day. Such temperature may occur after planting the plants into an outdoor habitat.
Proline content in leaves of Capsicum annuum and relative discharge of electrolyte was studied in two - day intervals. From the obtained results it can be concluded that the accumulation of proline was the highest for Lydia variety in a stressed scenario with the application of Atonic and the lowest proline content was found in in the Amy variety in a control group. Furthermore, it was discovered that the ontogeny of plants has an effect on the accumulation of proline and relative discharge of electrolyte from the beginning of the measurement. The absolute highest electrolyte discharge was measured in the Lydia variety in a stressed scenario and the lowest one was present in the Amy variety in a control group. These results confirm the hypothesis.
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Changes to the contents of proline and relative electrolyte leakage of the selected genotypes of poppies depending on the influence by low temperature
Kudrna, Jiří ; Hnilička, František (advisor) ; Orsák, Matyáš (referee)
The object of this thesis is to study the effect of low temperatures, proline content and relative elektrolyte leakage in a selected range of varieties of opium poppy.
Experiment included 18 poppy varieties with different contents of morphine. Poppy seeds for this experiment were provided by GB Oseva Pro s r.o., o.z.VÚO Opava a Český mák s.r.o.
Poppy seeds were sown in containers of a size of 7,5x7,5 cm. Used cultivation medium is mixture of garden substrate A with quartz sand in a ratio of 2: 1. Plants were grown under controlled conditions in grow chamber Conviron E8. Before starting the experiment, the temperature was at 10 ° C during day and 5 ° C over night. Light cycle was 13 hours light and 11 hours darkness. The maximum value of irradiance was 800 micromol. The experiment was initiated in phase of rosette develoment. At this developmental stage were the plants exposed to frost temperatures (-5 ° C) over night and chill temperatures (10 ° C) duringthe day. After a week the plants were regenerated for 1 week at 5 ° C over night and 10 C during the day.
All tested plants were in two day intervals measured of proline concentration after exposure to low temperature stress. At the same intervals as proline, were measured the values of relative elektrolyte leakage (Rel%).The obtained results show that the influence of low temperature causes increase of proline level. Control winter-crop variety Zeno exhibited the high kontent of proline (693.33 microg.g -1) in comparison with the spring poppy varieties. After regeneration were afected varieties Lazur, Opal, Buddha, Korneuburger Weisser, Aplaus, Major, Sokol, Zeno reduced the content of proline under the influence of higher temperatures. On the other hand the varieties Ofeus, Tatranský, Opex, Orbis, Maraton, Florián, Marianne and Albin were reversed with an increase of proline level. Proline concentration levels were constant and unchanged in case of varietes Postomi and Akvarel. Values of relative elektrolyte leakage were increased proportionately with length of exposure to low temperatures on the tested plants. The lowest value of membrane damage was after exposure to low temperatures observed in case of variety Zeno (23.53%). In the case of spring varieties was lowest membráně damage estimated in a variety Korneuburger Weisser (44.88%), while the highest was in the variety Orfeus (53.15%). It demonstrated the different responses of individual poppy varieties at low temperature. Most sensitive to low temperature were varieties Orfeus, Postomi, Akvarel, Orbis, Sokol and Marianne. As less sensitive to stress caused by low temperature seems to be spring varieties Opex, Buddha, Korneuburger Weisser, Albín.
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