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Impact of temperature and drought on gliadins content in two varieties of wheat
Seidlová, Kateřina ; Brázda, Václav (referee) ; Hrstka, Miroslav (advisor)
This bachelor’s thesis focuses on the effect of high temperature and drought on protein content of gliadin fraction on two varieties of wheat. Chosen varieties were Hyfi and Julie, cultivated at 26, 29, 32, 35 and 38 °C during flowering in watering controlled conditions. The condition for ‘wet’ samples was at least 70 % soil moisture and for ‘dry’ samples less than 30 % soil moisture. After harvesting, the seeds were milled into flour from which the gliadins were extracted with 2-chlorethanol. A-PAGE method was used for gliadin separation, quantification was carried out through computer densitometry. A significant genotype effect was discovered. Whilst temperature ranging from 26-38 °C with simultaneous drought stress had no significant effect on gliadin content of Hyfi variation, gliadin content of Julie variation shown obvious maximum at 32 °C. Therefore, Hyfi variation shown better resistance to heat stress than Julie variation. Both variations had higher gliadin content under drought stress than under good watering conditions.
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Influence of heating water temperature on efficiency of heating system
Hliboký, Samuel ; Poláčik, Ján (referee) ; Pospíšil, Jiří (advisor)
The content of this bachelor thesis is to describe ways of increasing efficiency of heating in a family house. Thesis is divided into theoretical and practical part. The theoretical part is dealing with principle of function of gas boilers and ways of decreasing the temperature of water in heating system. The practical part of thesis includes economic-technical evaluation of replacement of standard gas boiler by condensing boiler, based on return of investment.
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Indukce autogenie biologicky aktivními látkami u druhu \kur{Culex quinquefasciatus Say}
ŠEFČÍK, David
The main aim of this study was determinate which factors could induce autogeny and compare differences between autogenous and anautogenous populations of mosquitoes. All experiments were done with \kur{Culex quinquefasciatus Say}. Effects on temperature and food on the inductuion of autogeny were studied. Autogenous females usually don´t have to receive a blood during the first ovarian cycle. Our results confirmed that autogeny can be induced by temperature and different food high nutritive level.
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Changes of microclimate in a sedge-grass marsh within the last 40 years
Dušek, Jiří ; Stellner, Stanislav ; Hudecová, S.
The average, maximum and minimum air temperatures have been gradually increasing since 1977 to 2017. The air temperature rise was not the same in all periods of the year. We found different increases for individual months. The daily mean air temperature rose significantly in the growing period (April-August). The precipitation characteristics have been changing in the sedge-grass marsh too. The observed trends differ among months in sign as well as in the magnitude, and they are consistent with the air temperature changes. We found that extreme precipitation seems to occur significantly more frequently in recent years compared to the period before 2000. Awareness of these changes is important for possible positive human intervention when a desirable wetland ekosystem function is threatened.\n
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Effect of temperature on life cycle of zygomycetes
Matoušková, Barbora ; Kubátová, Alena (advisor) ; Nováková, Alena (referee)
This thesis is aiming on zygomycetes, their importance, their current position in the Fungi kingdom and above all their ecological demands. The paper summarizes the influence of temperature on their life cycle (i.e. primarily on the growth, reproduction and production of metabolites). It focuses mainly on psychrophilic and thermophilic species and describes the mechanisms of adaptation to unfavorable living conditions. To investigate the influence of temperature, zygomycetes are exceptionally suitable model organisms, e.g. in the order Mucorales we can find relatives growing in diametrically different environments. Among the mechanisms of extreme temperature adaptation for zygomycetes are in particular trehalose production, a change in the degree of saturation of membrane phospholipids and the production of membrane stabilizing agents - sterols, glycolipids and sugar alcohols. Key words: temperature, growth, reproduction, life cycle, habitat, extremophiles, Mucoromycotina, Mortierellomycotina
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Interactions in solutions and gels of stimuli-responsive polymer systems investigated by NMR spectroscopy
Konefał, Rafał ; Spěváček, Jiří (advisor) ; Hrabal, Richard (referee) ; Štěpánek, Miroslav (referee)
Stimuli-responsive (stimuli-sensitive, intelligent, or smart) polymers are polymer materials which, after small external stimuli, evidently change their physical or chemical properties. Smart polymers can be classified according stimuli they respond to such as: temperature changes, mechanical stress, light irradiation, ultrasonic treatment, application of external magnetic as well as electric field, changes of pH, ionic strength, addition of the chemical agents and presence of biomolecules and bioactive molecules. Stimuli-responsive synthetic polymer systems has attracted considerable attention due to wide range of applications, i.e. controlled drug delivery and release systems, diagnostics, tissue engineering and 'smart' optical systems, as well as biosensors, microelectromechanical systems, coatings, and textiles. Among the types of stimuli for this dissertation temperature, pH and reactive oxygen species (ROS) responsive polymer systems were studied. In case of thermoresponsive polymers, when polymer chains are molecularly dissolved in a good solvent, changes (increasing or decreasing) of temperature result in insolubility (globular nanoparticles formation) of polymer chains, called temperature induced phase-separation. pH responsive polymers change properties such as: solubility, volume (gels),...
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Temperature measurement of a machine tool
Novotný, Petr ; Merenus, Ondřej (referee) ; Hermanský, Dominik (advisor)
The aim of this work is to get acquainted with the problems of temperature measurement, various types of non-contact temperature measurement and types of non-contact gauges. It also tries to explain the basic concepts and knowledge from the field of machine tools and their thermal load. Part of the thesis is to test this knowledge using measurements at Intemac Solutions s.r.o. The acquired knowledge is then evaluated using graphs and tables.
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Utilization of absorption systems in the heating systems
Vidlák, David ; Špiláček, Michal (referee) ; Pospíšil, Jiří (advisor)
Main goal of this work is familiarization with basic features of absorption heat pumps and it’s growing importance on the market. In the first part of the work there is a research for clarifying facts associated with such pumps. In the introduction there are descriptions of basic information from the field of heating industry and its connections to our systems. Next there is a brief analysis of price changes in electricity and heat in the last five years. Main part of the analytical section is a description of the used absorption system. Second part of the work is focused on the calculation of the absorption system itself. First there is calculated internal and external part of the device according to the parameters from GE Power s.r.o. After this step there are parametric studies based on changes of key parameters of the default device for a demonstration of the behavior of a heating pump. In the end of the work there is a integration of the unit into the heating cycle for variations including flue gas condenser and using a cooling water from the turbine condenser.
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CFD simulation of air flow inside a car cabin
Kučera, Cyril ; Elcner, Jakub (referee) ; Pokorný, Jan (advisor)
The diploma thesis deals with CFD simulating the air flow inside the car using the numerical calculation program Star-CCM+. The aim of the thesis was to prepare 3D geometry, resp. realistic model of the real car, preparing boundary conditions including material properties, simulating the steady state of the environment and evaluating the speed and temperature of the car cabin. The paper presents the results of the temperature distribution and air velocities in the cabin during the winter, spring and summer conditions in HVAC on and HVAC off modes. The monitored air temperatures and surface temperatures of the car parts are compared with the measured data. The average difference between simulation and measurement was at air temperatures of 2.3 °C and surface temperatures of 3.4 °C.
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