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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Díla Maffea Pantaleoniho, vybrané otázky / Díla Maffea Pantaleoniho vybrané otázky

Asipkova, Hanna January 2010 (has links)
Diplomová práce je zaměřena na významnou italskou osobnost, Maffeo Pantaleoni, a na jeho velký vklad do italské a světové ekonomie. V práci jsou také popsané dva z mnohých problémů, kterými se zabýval italský ekonom na konci 19. a na počátku 20. století; jeho přátelství s Vilfredem Paretem a o skandálu Římské banky, ve kterém Pantaleoni hrál jednu z hlavních rolí. Maffeo Pantaleoni zdůrazňuje důležitost výchozích a konečných pozic pro ekonomické subjekty v díle Výchozí a konečná pozice. Kde ekonom analyzuje a snaží se aplikovat vzájemné působení výchozích a konečných bodů krátkodobých a dlouhodobých časových intervalů v ekonomickém aspektu pomocí příkladů a alegorie. Pomocí druhého díla Některé fenomény ekonomické dynamiky Maffeo Pantaleoni pokračuje ve studiu ekonomů neoklasiků, kteří přesně definovali pojem statiky, a uvádí a vysvětluje dynamiku druhého druhu. Tady autor klade důraz hlavně na vliv rostoucí poptávky na dimenzi podniku a na rozdělení hlavních a specifických výdajů. V obou případech Maffeo Pantaleoni je proti státnímu zásahu a vystupuje pro "svobodnou" ekonomii.
2

Diverzita obojživelníků (Amphibia) a jejich antropogenní ovlivnění na vodních plochách v oboře Holedná

Dokulilová, Martina January 2015 (has links)
In the spring 2014 was observed species numbers and species diversity of amphibians (Amphibia) on six selected water surfaces in a Holedna game preserve, which is located in Brno territory. To determine the numerical and species representation was used a visual method. In total, there were found 5 species in the monitored locations: Smooth Newt (Lissotriton vulgaris), Common Toad (Bufo bufo), Common Frog (Rana temporaria), Agile Frog (Rana dalmatina) and European Tree Frog (Hyla arborea). During the observation, from 18th March to 13th July, there were recorded the numbers of individual amphibians species (Amphibia) and then these data were used to calculate the synecological characteristics (dominance, species diversity, equitability, Jaccard similarity coefficient). Altogether, the most plentiful species was Common Toad (Bufo bufo) and least plentiful species was Europian Tree Frog (Hyla arborea). Representation of individual species in the monitored area was not balanced in relation to species number. Predominant occurrence of eudominant species on the all water surfaces points out to disturbed or artificial biocenosis. Based on observation was evaluated anthropogenic influence, where fragmentation, absence of rainfall, forest management and an admission of the game preserve can be included. Subsequently, the appropriate solutions to increase species diversity were designed.
3

Hodnocení hmotnostních ztrát při výrobě masných výrobků

Štěpánková, Irena January 2007 (has links)
No description available.
4

Populační biologie a ekologie Phyteuma orbiculare L. / Population biology and ecology of Phyteuma orbiculare L.

Fialová, Tereza January 2010 (has links)
Population biology and ecology of the species Phyteuma orbiculare L. Abstract This diploma's thesis deals with Phyteuma orbiculare L. (Round-headed Rampion) from family Campanulaceae. According to the law (MŽP ČR 395/1992 Sb.) the studied species is classified as a seriously endangered species of the Czech flora. Two of its distinguished subspecies (subsp. montanum and flexuosum) are on the Red list of vascular plant species (Procházka 2001) of critically endangered species. One of the outputs of this thesis are grid maps of all localities of the species in the following time intervals: until 1949, 1950 - 1989, 1990 - 1999 and 2000 - 2010. As information sources about location of P. orbiculare I used herbaria collections, literature, botanical databases, and Protected Landscape Area Administrative reports. Some data were obtained from botanical experts and some from my personal field-work. One of the main results of thesis is comparison of the distribution of historical and recent localities of the species. I studied chemical composition of soil, species composition and number of flowering plants amount of populations in 21 recent and 19 historical localities in Czech Republic. Recent localities are richer in species and poorer in nutritive substances than the historical localities. Number of flowering...
5

Odstraňování microcystinů při úpravě pitné vody / Removal of microcystins during drinking water treatment

Vaněčková, Hana January 2015 (has links)
The aim of this diploma thesis is to explore the coagulation phase in water treatment process from two perspectives, the removal of cyanotoxin microcystin and the responses of ecotoxicological indicator species Daphnia magna to different concentration of this toxin, contained in a sample of cyanobacterial water bloom, which was extracted from a dam and was dominated by cyanobacteria Microcystis aeruginosa. The sample was administered in three environmentally relevant concentrations to 6 clones of Daphnia magna, 3 of which had previous experience with M. aeruginosa. Coagulation process was performed under optimal conditions: pH = 6.36; KNK4,5 = 0.26 mmol.l-1 ; Fe = 0.162 mg.l-1 ; DOC = 2.83 mg.l-1 using 10 ml of 0.125M NaHCO3 in two litres of ultrapure water. Individual forms of microcystin were detected in this ratio: 31.6 % MC-LR, 53.6 % MC-RR and 14.8 % MC-YR. The study has shown that under these conditions coagulation does not remove microcystin, e.g. the efficiency of the process is zero. In ecotoxicological study, with growing concentration of cyanobacterial mixture the negative impact on Daphnia magna increased. We have found interclonal variability in responses of D. magna, however, the previous experience with M. aeruginosa had no effect. With growing concentration of cyanobacterial water...
6

Stanovištní nároky a prediktivní modelování výskytu druhu Huperzia selago / Habitat requirements and predictive distribution modelling of Huperzia selago

Trachtová, Pavla January 2014 (has links)
Studies of the occurrence of montane and boreomontane species in ravines of the sandstone landscape are scarce and the occurrence of these species are explained by the presence of temperature inversion. The question is, which factors limit the occurrence ofthese species in ravines with temperature inversion. The aim of this diploma thesis is to reveal factors that influence the occurrence of Huperzia selago in inverse ravines of sandstone landscape. This work uses a habitat variables recorded directly for populations of H. selago and variables derived from a digital elevation model. These derived variables are also used for creation of two predictive models of geographic distribution of H. selago in the National Park Bohemian Switzerland. When we summarize the most informative variables of predictive models and habitat conditions significantly different from control sites, we get the typical habitat of H. selago. Such sites will likely be found on the rock at the bottom of the valley. Factors that influence the suitability of habitat are: moisture, vegetation type, slope, and distance to the bottom of the valley.
7

Rodičovské chování a rozpoznávání mláďat u gekonů rodu Teratoscincus / Parental behavior and recognition of juveniles in geckos of genus Teratoscincus

Suchomelová, Petra January 2011 (has links)
4 ANNOTATION The diploma thesis deals with parental behavior and recognition of youngs by two kinds of desert geckos of genus Teratoscincus, specifically T. scincus and T. keyserlingii. The geckos inhabit a very extreme environment where it is not easy to survive, especially for the small hatchlings. Therefore, it is probable that small hatchlings live together with their parents in their territory for some time. If the parents tolerated them inside their territory, they would provide them with an indirect form of parental care. In the first part of the thesis the hypothesis that adults tolerate to the presence of juvenile conspecifics and heterospecifics (Eublepharis macularius) was tested. The main goal was to determine whether adults tolerate juveniles generally or whether they recognize juveniles conspecifics. To support the hypothesis of the adults' tolerance of juveniles the eggs of the adult geckos living in pair were left in their terrarium until the hatching of the juvenile. Further, the reaction of adult geckos to the presence of a E. macularius juvenile (small), admitted into the terrarium, was tested. The aim was to find out whether the two kinds of geckos, preying other geckoes in the nature, show predatory behavior toward the E. macularius. The standard experiment was carried out in the second...
8

Pojetí druhu u medvědovitých (Ursidae): praktická, historická a teoretická perspektiva / Concept of species in bears (Ursidae): practical, historical, and theoretical viewpoint

Wagner, Jan January 2012 (has links)
The present thesis surveys topic of taxonomic diversity and phylogeny of bears (Mammalia, Ursidae) and aspects of its contextual setting under effects of changing conceptual and methodological viewpoints. This problem is studied from several perspectives. The historical perspective is represented by a critical overview of the history of specific and infraspecific classification of bears with special respect to mutual influences of this classification and theoretical concepts of species accepted in particular periods. The perspective of material approach is exemplified by a material-based study of taxonomical and phyletic status of selected Pliocene to Middle Pleistocene ursine taxa. Along with deconstruction of some traditional hypotheses this produced a model explaining species diversification in ursine bears and its discussion in terms of factual relevance of included background concepts. In the pre-evolutionary period the bear species were usually understood broadly, as incipient immanent entities, yet exhibiting obvious certain infraspecific variability. This was established using definitions of varieties (mostly not identifiable with present subspecies or infraspecific taxa) considered as unstable modes of particular species. Although, in the post-Darwinian period, the concept and taxonomic...
9

Vývoj početnosti lesních ptáků v České republice / Population trends of forest birds in Czechia

Szarvas, Filip January 2021 (has links)
Currently, most scientific attention focused on bird population trends is centred on birds in the agricultural landscape. Forest bird research, on the other hand, is given far less space, despite the fact that forests in Europe often form a substantial part of the landscape in some parts. Moreover, it is undergoing drastic changes throughout Europe, and especially in the Czech Republic. In the second half of the 20th century, their quality deteriorated due to air pollution, later regenerated, but other additional challenges have emerged, such as global climate change and epidemics of wood-destroying insects. It is therefore possible to assume their fundamental influence on forest bird populations. However, most of the work examining the effects of the forest environment and forest management on bird populations is only very local, limited to ecologically valuable, and therefore quite specific, habitats, or covering only a small number of bird species. However, data on the evolution of forest birds vary across Europe. In Finland, for example, forest birds are declining, while in neighbouring Sweden the trend is the opposite. In this study, I aim to better map what characteristics of forests affect specific species of birds, in research conducted throughout the Czech Republic. I decided to explore...
10

Molekulární taxonomie flebotomů (Diptera: Psychodidae) v Evropě / Molecular taxonomy of sand flies (Diptera: Psychodidae) in Europe

Grešová, Markéta January 2019 (has links)
Phlebotomine sand flies (Diptera, Psychodidae) are small blood sucking insects which are only proven vectors of neglected tropical disease called leishmaniasis. Sand flies of the genus Phlebotomus act as vectors in the Old World and those of genus Lutzomyia are vectors in the New World. However, not all of them are capable of transmitting the disease. It is therefore crutial to conclusively determinate the species and have up-to-date knowledge of their natural occurence. Routine identification based on morphological characters is challenging due to intraspecific variability of these or their possible damage during the capture and preparation. In adition, correct assessment of distinctive cahracters, especially for females, is difficult and requires certain expertise. Thus, approaches of molecular taxonomy have been recently increasingly used for sand flies species determination. This thesis presents usage of DNA sequencing and MALDI-TOF protein profiling for routine determination of sand flies caught in southeastern Europe and adjacent regions, where we have lack of information of present sand flies species. Another part of this thesis focus on closer examination of relations between selected closely related species within species complexes. Key words: Phlebotomus, molacular identification, DNA...

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