|
The effects of mating with multiple males on reproductive success of a female: An experimental study in leopard gecko (Eublepharis macularius)
Ševčíková, Pavlína ; Frynta, Daniel (advisor) ; Rehák, Ivan (referee)
The aim of the project was to test female advantages of promiscuous and/or polyandrous mating. Although, previous studies reported improved reproductive success of females copulating with multiple males in many model species, including Eublepharis macularius, this study failed to demonstrate such a benefit of polyandry. Traits reflecting female reproductive success, i.e. the number of produced eggs, egg mass, hatchability, hatchling mass, growth and survival were not influenced by copulation with multiple partners, but some of them were dependent on female condition. Only initial stages of juvenile growth were influenced by female identity and/or investment.
|
|
The application of magnetic particle for DNA isolation from selekted probiotic products for children
Vozárová, Petra ; Rittich, Bohuslav (referee) ; Španová, Alena (advisor)
In the food industry, it is important to correctly identify the species of bacteria and thier properties so that they can be used as a probiotic in dietary supplements. This is performed using DNA diagnostics. In the experimental part, the DNA from four probiotic dietary supplements for children was isolated. Magnetic particles P(HEMA-co-GMA) were tested for isolation. Isolated DNA was amplified by PCR and the presence of DNA of genus Lactobacillus, Bifidobacterium and Bacillus was demonstrated in the products according to the data declared by the manufacturer. The presence of species L.acidophilus, B.animalis in accordance with the data on the product has been demonstrated by PCR with species specific primers. Using PCR, the presence of L.casei, which was declared by the manufacturer, has not been proven in one product at given experimental conditions.
|
|
Tuned semiconductor laser for the diagnostic of the channel waveguides
Ondráček, František ; Skalský, Miroslav ; Čtyroký, Jiří
In contribution is described new measuring set up with tuned semiconductor laser and there are given first results of spectral losses and group refractive index in various channel waveguides by using a resonator method. The waveguides were prepared in special glasses by ion exchanges method and in LiNbO.sub.3./sub. crystal by proton exchange and also by titan difusion. Experimental results have demonstrated accuracy and rate of this arangement. In conclusion we have shown the possibility of the next research.
|
|
Healthy schizophrenia. Influences of Brechtian epic theatre and alienation effect in Czech modern acting
Musilová, Martina ; Hyvnar, Jan (advisor) ; Císař, Jan (referee) ; Just, Vladimír (referee)
The work, Healthy Schizophrenia, Influences of Brechtian Epic Theatre and the Alienation Effect in modern Czech Acting, is divided into two parts. The first section is devoted to acting approaches in Brechtian epic theatre. It is focused on a breakthrough period in Brecht's experimentation, to which belong the stagings of the play Man is Man in 1931, an adaptation of Gorky's The Mother in 1932 and Lehrstücks. This part of the examination is based theoretically on studies of the Street Scene, Alienation Effectsin Chinese Acting, and Notes to the Opera, Rise and Fall of the City of Mahogany. The work also takes into account Brecht's inspirations, including the acting of Mej Lan-fang and American slapstick. The author considers these basic acting principles to be the basis of epic acting: simultaneity of play spaces; description of an event; presentation of and self-presentation of characters; actors presenting character in the third person; speaking directly to public; the actor's attitude as spectator; the principles of quotation and demonstration (of an event, action or of a style); admission of authorship; fragmentary and non-continuous representation of character; the principle of play (playing at a thing); didactics; representation of one's opinions; using an alienation effect; stepping out of a role....
|
|
Effect of vegetation on snow accumulation and snow melt
Pevná, Hana ; Kocum, Jan (referee) ; Jeníček, Michal (advisor)
Effect of vegetation on snow accumulation and snow melt Abstract: This bachelor thesis analyzes the impact of physical-geographic factors on the physical properties and characteristics of the development of snow cover. Results published in the literature are compared with those obtained from experimental measurements in the upper Byst ice River basin in the Ore Mountains during the winter 2009/2010. The paper compares the evolution of snow cover for the actual land cover, forest and open areas. The research of literature and research conducted in the Ore Mountains proved that vegetation significantly affects accumulation and melting of the snow. The process of accumulation in the forest is influenced by snowfall interception in the treetops. Melting snow in a forest area slowed absorption and reflection of sunlight in the treetops. The bachelor thesis demonstrates that in the open areas the snow melted faster than in the forest growth. Keywords: snow cover, snow water equivalent, vegetation, Ore Mountains
|
| |
|
Anti-Corruption Mechanism in Economic Models of Corruption
Krajčová, Jana ; Ortmann, Andreas (advisor) ; Frank, Bjorn (referee) ; Spagnolo, Giancarlo (referee)
This dissertation consists of three chapters that, theoretically and experimentally, address the effectiveness of anti-corruption mechanisms. In the first chapter, I analyze the effects of monitoring on an agent's incentives in a two-period principal-agent model in which the agent decides on his effort and corruptibility. The agent's type and strategy are unknown to the principal. I compare incentive-compatible wages under three different scenarios: 1) the principal does not monitor and only observes output; 2) the principal monitors the agent's effort choice; and 3) the principal monitors the agent's corruptibility. I find that monitoring of effort improves the sorting of types but it might also give the agent more incentive to be corrupt. Monitoring of corruption does not improve the sorting of types but it negatively affects the agent's incentive to be corrupt. In the second and in the third chapter I analyze experimentally how promising as anti-corruption measures leniency policies really are. Buccirossi and Spagnolo (2006) had conjectured, based on theoretical work, that ill-designed legal environments might, in fact, produce results that contradict the intentions of the designers of the leniency policies. And, indeed, I demonstrate, for the first time as far as I know, that real-world subjects...
|
|
Model of cortical focal cerebral ischemia of a rat
Kaštylová, Klára ; Otáhal, Jakub (advisor) ; Brime, Tufikameni (referee)
Model of cortical focal cerebral ischemia of a rat. Aim: Determine the size of the damage of the cerebral cortex in the adult animal based on the length of irradiation a dose of Bengali red. Methods: An experimental study was conducted on specimens of an adult rat. Focal Cerebral ischemia was induced by the application of Bengali red. Assessment of damage cortex was done descriptively and with a special program has been calculated the size of the lesions which were then individually compared. The results: Demonstrate that the most appropriate parameter for comparison to measure the depth of the lesion lesion. Further shows that the lesion depth is dependent on the duration of irradiation, but not a direct linear relationship. And among the used concentrations of rose bengal were found significant differences. Key words: Focal cerebral ischemia, bengal rose, cerebral cortex, photochemical method Powered by TCPDF (www.tcpdf.org)
|
|
Using Neural Networks in the Hierachical Routing
Straka, Martin ; Lokoč, Jakub (referee) ; Štanclová, Jana (advisor)
The objective of the diploma thesis is to show possible utilization of the neural networks for the partitioning needs of the hierarchical routing algorithm. The work proposes a hierarchical approach, which can be useful for the optimal path searching process. We focus on the application of several neural network models to extract hierarchical information from the transportation network data. Introduced models are based on the energy minimization principle and we demonstrate an employment of the deterministic annealing methods (MFA) as quite ambitious in the partitioning process. The experimental part of this work makes use of our findings and propose several suggestions on the proper parametrization of employed neural network models. In the experimental tests, we demonstrate capabilities of the MFA to provide a partitioning task also in case of lack of the global information.
|
|
Anti-oxidative stress response in Drosophila melanogaster - The role of adipokinetic hormone and adenosine
ZEMANOVÁ, Milada
In this thesis, the phenomena of the oxidative stress (OS) and anti oxidative stress responses in insects are described in a comprehensive review, and the outcomes of the experimental work are presented. The focus of the work was on defence reactions and their putative control by the adipokinetic hormone (AKH) and adenosine in the Drosophila melanogaster model. For this purpose, we studied the effect of the paraquat (oxidative stressor) treatment on adult flies and larvae carrying mutations in Akh (Akh1) and adenosine receptor (AdoR1) genes, and in both these genes together (Akh1 AdoR1 double mutant). The initial mortality tests revealed the double mutant Akh1 AdoR1 was more sensitive to OS than either of the single mutants. The AKH synthesis under the OS condition seems to be out of the gene expression control, since the increase of an AKH amount in CNS was not linked with the stimulation of Akh gene expression after a paraquat treatment. Further, the gene expression of the antioxidant enzyme glutathione S transferase D1 (GstD1) increased rapidly with OS, though the enzyme activity increased negligibly regardless of both the OS and mutations. Interestingly, the relative expression of GstD1 gene was minimal in the double Akh1 AdoR1 mutant; thus, it was concluded that both AKH and adenosine are employed in the GstD1 gene expression control. Similarly, AKH and adenosine seem to act in tandem in glutathione (GSH) regeneration, since the GSH level was significantly lower in all untreated deficient flies with the maximal effect in the Akh1 AdoR1 double mutant; accordingly, the reduction in the GSH level was enhanced by paraquat treatment. Altogether, the important roles of both AKH and adenosine in the anti oxidative stress response in D. melanogaster were demonstrated.
|
guest ::
