National Repository of Grey Literature 66 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Nursing Care in Patient with Acute Myocardial Infarction
Němec, Pavel ; Sojková, Monika (advisor) ; Burišková, Klára (referee)
The aim of this bachelor thesis is to identify the characteristics of prehospital and hospital care of patients with acute myocardial infarction. The theoretical part of the thesis summerizes clinical symptoms, diagnostical procedures and treatment of such patients. There is mentioned the importance of preventive steps, also. The differences in prehospital and hospital nursing care of acutelly ill patient are examined in detail. The practical part of the thesis uses data of Pilsen Region Rescue Service and analyzes the incidence of acute myocardial infarction in this area. Furthermore, two case studies discuss the appropriateness of nursing care. Key words: acute myocardial infarction, interventional treatment, nursing care, nursing diagnose, interventional treatment, patient
The effect of incubation temperature on cognition and brain cellular composition in geckos Paroedura picta
Polonyiová, Alexandra ; Němec, Pavel (advisor) ; Sedláček, František (referee)
The effect of incubation temperature on different morphological, physiological, cognitive and behavioral characteristics in reptiles is a well-studied topic, although the underlying mechanism leading to the differences between individuals incubated at different temperatures remains largely unknown. In this thesis I studied the effect of incubation temperature on cognitive abilities and the number of neurons and non-neuronal cells in the gecko Paroedura picta incubated at two different temperatures, 24řC and 30řC. The geckos were tested in two cognitive tasks with simulated predatory attack. 14-day-old hatchlings were tested in a Y-maze, while 6-months-old geckos were tested in an arena with shelters of different colors. After testing, the number of neurons and non- neuronal cells in several parts of the brain were estimated using the isotropic fractionator in selected individuals. Although incubation temperature did not affect the success in the cognitive task in hatchlings, it did affect the total time needed to find the shelter. This difference remained significant also in adult geckos. The number of neurons, which was used as a proxy for the information processing capacity of the brain, did not affect success in the cognitive tasks. However, absolute brain size correlated with success in the...
Optimization of the Production Line Supply Process
Kremzová, Jana ; Němec, Pavel (referee) ; Videcká, Zdeňka (advisor)
The bachelor's thesis deals with the supply process optimization of the production line in the JKVB, s. r. o. company. It is based on the analysis of the supply process and focuses on finding its bottlenecks. As part of the solution, a methodology for determining the optimal amount of material on the line, including its application, is proposed. The whole proposal is evaluated by four criteria. These are return on investment, work productivity, ergonomics and space saving.
Cone mosaic in the retina of ray-finned fishes and its function for vision
Konvičková, Zuzana ; Musilová, Zuzana (advisor) ; Němec, Pavel (referee)
Ray-finned fishes comprise more than half of the vertebrate diversity, and they developed many unique strategies and adaptations to inhabit miscellaneous water environments. This thesis is dedicated to vision, which is an indispensable sense for most fishes. Special focus is laid on photoreceptor morphology and their arrangement in a two-dimensional pattern - cone mosaic. There are three morphological types of photoreceptors commonly found in ray-finned fishes - rods, single cones, and double cones. Triple and quadruple cones that have never been observed in any other vertebrate group sometimes occur too. In this thesis, I discuss the structure and function of individual photoreceptors. While rods are randomly distributed across the retina, cones often form a regular mosaic. Several basic mosaic types can be distinguished according to the position of double cones. Row and square mosaics are the most prevalent. Basic patterns can be further modified in certain fish species. In this thesis, I describe basic patterns, I focus on mosaic development, and I investigate the reasons for regular photoreceptor arrangement. The type of mosaic partly reflects phylogeny, but it is also strongly influenced by the environment and life strategy of the fish. Active fishes inhabiting bright environments are likely...
Electronically adjustable active load for support of laboratory work – feasibility of an implementation
Němec, Pavel ; Hruboš, Zdeněk (referee) ; Šotner, Roman (advisor)
This master’s thesis deals with active electronic loads focusing mostly on alternating input signals. The principles and modes of both DC and AC loads are described, as well as the most important parameters of MOSFET transistor which is used as the main power component. It deals with designing a regulation circuit of an AC load in detail. This work also discusses the possibilities of realisation of the remaining parts of the device. At the end of the thesis the function of the designed regulation circuit is verified by simple measurements on a prototype.
Cellular scaling rules for dog brains: Effect of domestication and miniaturization of dog breeds
Salajková, Veronika ; Němec, Pavel (advisor) ; Chaloupková, Helena (referee)
The process of domestication of the grey wolf (Canis lupus) resulted in more than 350 dog breeds attesting for an immense phenotypic plasticity of this species, reflected in the enormous variation of sizes, shapes and behavioural profiles of today's dogs. The differences in body size can be 50-fold, which exceeds the body size variation of all recent canids. The differences in brain size are significantly smaller, only about 2.5-fold. It is also well known that, compared to their wolf ancestor, dogs, and especially small breeds, have reduced brain size. However, up till now, no comparative data about neuron numbers in different dog breeds are available. In this thesis, I use the isotropic fractionator to assess number of neurons and glial cells in eight dog breeds and three species of wild canids. When compared across dog breeds analysed, the differences in neuron numbers are lower than the differences in brain size - it seems that small breeds compensate for smaller brains with higher neuronal density. Interestingly, miniaturization of dog breeds is associated with brain size reduction that is smaller than expected from brain-body scaling reported for wild canids and seems to be accompanied by compensatory increase of neuronal density. Thus, brains of small dogs are bigger and harbour more neurons...
Evolution of the telencephalon in amniotes
Stehlík, Patrik ; Němec, Pavel (advisor) ; Druga, Rastislav (referee)
Structural organization of the telencephalon differs starkly among mammals, birds and non-avian reptiles. No clear homologue of the mammalian six-layered cerebral cortex has been identified in other vertebrate groups. In the last century, this topic has sparked heated disscussions in the field of comparative neurobiology. Available data point to clear homologies between telencephalic subpallial regions among all amniotes. Many hypotheses have been proposed about homologies within the pallium that offer contrasting reconstructions of the evolution of the aminote telencephalon. While earlier hypotheses suggest homologies at the level of neural circuits and embryological territories, the most recent hypothesis suggests homology at the level of individual cell types possessed by a last common ancestor of reptiles, birds and mammals. The resulting diametrically different structures have been organized by different developmental mechanisms. However, recent transcriptomic data are in direct conflict with these claims, and support the hypothesis which assumes that higher cognitive functions in both major lineages of amniotes evolved independently by expansion of different embryonic fields. The aim of this bachelor's thesis is to provide comprehensive information about the proposed homologies and hypotheses...
Distribution of photoreceptor types in retina of fishes from extreme environments
Remišová, Kateřina ; Musilová, Zuzana (advisor) ; Němec, Pavel (referee)
Cichlid visual system is highly adaptive to the environment. Fish visual abilities are deter- mined by composition of opsin-based photosensitive pigments located in photoreceptor cells (rods and cones) as well as their distribution. In this thesis, four species of Lake Barombi Mbo cichlids were targeted: Stomatepia mariae, Konia eisentrauti, Konia dikume and Myaka myaka. Shallow-water cichlids K. eisentrauti and S. mariae express these types of cone opsin genes: LWS, RH2A (RH2Aβ more than RH2Aα), SWS2A and SWS2B. Contra- rily, both seasonally deep-water M. myaka and deep-water K. dikume lack expression of SWS2B and LWS in their retinae, but they express SWS2A and RH2Aα more than RH2Aβ, which corresponds to modified light conditions in deep water - a dimmer habitat lacking marginal parts of the spectrum (i.e., ultraviolet and red wavelengths). The photoreceptor distribution of selected species was investigated by means of fluorescent in situ hybridi- zation (FISH) in order to understand the performance and evolution of their visual per- ception with emphasis on the effect of depth. Distinctively, cichlid cones are arranged in a retinal mosaic consisting of short-wavelength sensitive single cones, each surrounded by four long-wavelength sensitive double cones. In this thesis, the same arrangement is...
Cellular scaling rules for brains of gallinaceous birds
Zhang, Yicheng ; Němec, Pavel (advisor) ; Kratochvíl, Lukáš (referee)
Galliform birds (Galliformes) make up together with anseriform birds (Anseriformes) the clade Galloanserae, the sister group of Neoaves and the most basal clade of Neognathae. However, to date no quantitative data on cellular composition of their brains have been available. Here, I used the isotropic fractionator to determine numbers of neurons and non-neuronal cells in specific brain regions of 15 species of galliform birds. I find that cellular scaling rules for galliforms differ starkly from those for songbirds and parrots. When compared to these crown avian lineages, galliform birds feature lower degree of encephalization, a proportionally smaller telencephalon, small telencephalic and dominant cerebellar neuronal fractions, generally lower neuronal densities and larger glia/neuron ratios. Consequently, their brains and especially their forebrains harbor much smaller absolute numbers of neurons than those of equivalently sized songbird and parrots, the fact that undoubtedly constrains cognitive abilities of galliforms. However, this not to say that galliform birds are "bird brains" with low numbers of neurons and a limited ability to learn. Because they have high neuronal densities, their relatively small brains contain about equal numbers of neurons as brains of equivalently sized rodents and...

National Repository of Grey Literature : 66 records found   1 - 10nextend  jump to record:
See also: similar author names
19 NĚMEC, Pavel
31 NĚMEC, Petr
1 Němec, P.
31 Němec, Petr
1 Němec, Přemysl
Interested in being notified about new results for this query?
Subscribe to the RSS feed.