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Silver Nanodispersions Processing
Hubová, Jana ; Dittrich, Milan (advisor) ; Šnejdrová, Eva (referee)
ABSTRAKT- EN The features of instability of silver nanosuspensions prepared by two alternatives of reduction Tollens method were studied. Sodium borohydride and maltose were selected and used as reduction agent. The samples used differ from the aspects of particle size and their zeta potential. These two parameters were monitored during the process of reverse dialysis and following process of spray drying by using of manitol as carrier. As nanodispersion stabilizers were tested protective colloids - gelatin hydrolysate, polyvinylalcohol and poloxamers.
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Host-parazite coevolution in aquatic environments
Hubová, Jana ; Petrusek, Adam (advisor) ; Votýpka, Jan (referee)
Antagonistic coevolution is a major driving force in the evolution of host and parasite. Parasites create on their host a time delay, negative frequency-dependent selection, which leads to oscillations in both genotypes of antagonists, as suggested by the Red Queen hypothesis derived for coevolution of host and parasite. The most commonly used systems for the study of host-parasite coevolution in an aquatic environment are (thanks to their features): diatom Asterionella and chytrid Zygorhizidium, aquatic snail Potamopyrgus and trematods Microphallus, water fleas Daphnia and their microparasites. Coevolution between host and parasite causes a number of phenomena, such as maintenance of genetic polymorphism, temporal oscillations of genotype frequencies, the persistence of sexual reproduction, parasite local and host adaptations. This thesis summarizes the current knowledge on the coevolution of the above-mentioned three host-parasite systems in the aquatic environment. Key words: Red Queen hypothesis, host-parasite coevolution, negative frequency-dependent selection, aquatic environments, Asterionella formosa, Potamopyrgus antipodarum, Daphnia.
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Microparasites and fecundity of Daphnia at environmental gradients of canyon-shaped reservoirs
Hubová, Jana ; Petrusek, Adam (advisor) ; Macháček, Jiří (referee)
The original aim of my diploma thesis was examination of fixed samples of cladocerans from the Daphnia longispina species complex from reservoirs Vír and Vranov for the presence of 4 groups of microparasites: microsporidia, oomycetes, the protozoan Caullerya mesnili, and the yeast Metschnikowia bicuspidata. The next aim was to determine the effect of parasites on Daphnia fecundity, and determination of their spatial and temporal distribution within reservoirs. From the total number 4452 of examined Daphnia females, however, only 56 individuals were infected. This number was not sufficient for the planned analyses. As I recorded for all examined individuals the clutch size, I thus dealt to a large extent with an alternative issue: the temporal and spatial variation of, and the influence of environmental factors on Daphnia fecundity. Both studied reservoirs are characteristic by canyon-shaped profile that allows formation of environmental gradients on the horizontal as well as vertical axis. The results confirm that reservoir identity, season, and location within the reservoir (or gradient of food supply) have all significant effects on fecundity. During my work I have encountered difficulties associated with determining microparazites from fixed zooplankton samples. The appendix section of my thesis...
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Microparasites and fecundity of Daphnia at environmental gradients of canyon-shaped reservoirs
Hubová, Jana ; Petrusek, Adam (advisor) ; Macháček, Jiří (referee)
The original aim of my diploma thesis was examination of fixed samples of cladocerans from the Daphnia longispina species complex from reservoirs Vír and Vranov for the presence of 4 groups of microparasites: microsporidia, oomycetes, the protozoan Caullerya mesnili, and the yeast Metschnikowia bicuspidata. The next aim was to determine the effect of parasites on Daphnia fecundity, and determination of their spatial and temporal distribution within reservoirs. From the total number 4452 of examined Daphnia females, however, only 56 individuals were infected. This number was not sufficient for the planned analyses. As I recorded for all examined individuals the clutch size, I thus dealt to a large extent with an alternative issue: the temporal and spatial variation of, and the influence of environmental factors on Daphnia fecundity. Both studied reservoirs are characteristic by canyon-shaped profile that allows formation of environmental gradients on the horizontal as well as vertical axis. The results confirm that reservoir identity, season, and location within the reservoir (or gradient of food supply) have all significant effects on fecundity. During my work I have encountered difficulties associated with determining microparazites from fixed zooplankton samples. The appendix section of my thesis...
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Host-parazite coevolution in aquatic environments
Hubová, Jana ; Petrusek, Adam (advisor) ; Votýpka, Jan (referee)
Antagonistic coevolution is a major driving force in the evolution of host and parasite. Parasites create on their host a time delay, negative frequency-dependent selection, which leads to oscillations in both genotypes of antagonists, as suggested by the Red Queen hypothesis derived for coevolution of host and parasite. The most commonly used systems for the study of host-parasite coevolution in an aquatic environment are (thanks to their features): diatom Asterionella and chytrid Zygorhizidium, aquatic snail Potamopyrgus and trematods Microphallus, water fleas Daphnia and their microparasites. Coevolution between host and parasite causes a number of phenomena, such as maintenance of genetic polymorphism, temporal oscillations of genotype frequencies, the persistence of sexual reproduction, parasite local and host adaptations. This thesis summarizes the current knowledge on the coevolution of the above-mentioned three host-parasite systems in the aquatic environment. Key words: Red Queen hypothesis, host-parasite coevolution, negative frequency-dependent selection, aquatic environments, Asterionella formosa, Potamopyrgus antipodarum, Daphnia.
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Silver Nanodispersions Processing
Hubová, Jana ; Dittrich, Milan (advisor) ; Šnejdrová, Eva (referee)
ABSTRAKT- EN The features of instability of silver nanosuspensions prepared by two alternatives of reduction Tollens method were studied. Sodium borohydride and maltose were selected and used as reduction agent. The samples used differ from the aspects of particle size and their zeta potential. These two parameters were monitored during the process of reverse dialysis and following process of spray drying by using of manitol as carrier. As nanodispersion stabilizers were tested protective colloids - gelatin hydrolysate, polyvinylalcohol and poloxamers.
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Performance measurement and management of ThyssenKrupp Výtahy, s.r.o.
Hubová, Jana ; Vávrová, Hana (advisor) ; Brabec, Martin (referee)
This master thesis focuses on checking the status of performance measurement and management of ThyssenKrupp Výtahy, s.r.o. and on implementation of financial analysis for years 2007-2012. The first part is concentrated mainly on the current state of performance measurement and management and introduction of IT background including introduction of the reporting system and their use in performance management. The second part is dedicated to the financial analysis to find the weaknesses in performance management using vertical and horizontal analysis of financial statements, ratio indicators, credibility and bankruptcy models, EVA indicator and a comparison with the sector average, and to summarize the results and to provide recommendations.
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Management of projects financed from the EU and their impact
Hubová, Jana ; Potluka, Oto (advisor) ; Svitáková, Jiřina (referee)
The thesis evaluates management of projects financed from the EU, that were implemented in Slovakia, and their impact on microeconomic and macroeconomic level. Objects of the thesis are three national and two demand-oriented projects. Management evaluation is carried out by presenting the procedures and by evaluating and comparing planned and actual physical indicators of the projects. Impact evaluation is also accomplish by comparing values of planned and actual physical indicators.
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