National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Vulnerable benthic water bug species \kur{Aphelocheirus aestivalis }(Fabricius, 1794) (Heteroptera: Aphelocheiridae): distribution and habitat preference in the Czech-Austrian border area of the Lužnice river basin
BAUER, Martin
The occurence, ditribution, habitat preference of benthic water bug Aphelocheirus aestivalis, and structure of macroinvertebrate benthic communities were studied in the upper Lužnice River basin. A. aestivalis is distributed only in a lower part of the upper Lužnice river basin. It inhabites stony biotopes of Dračice river (= Reissbach in the Austrian side), Lužnice river downstream from Suchdol nad Lužnicí, Old part of Lužnice river, Nová řeka river, and Nežárka river. This species occurs only in the rocky and sandy bottom where current speds and dissolved oxygen are both high in the investigated area. Prefered microhabitats are represented by sand and coarse gravel, that overline the larger boulders, rocks, dead woods or rootlets of trees growing in banks and sandy places with submerged plants. Though the Lužnice river has numerous sites of character of prefered habitats and microhabitats also upstream from Suchdol nad Lužnicí, any specimens of A. aestivalis were never found upstream from this small city and in the Koštěnický potok brook (mouth of this right side tributary into Lužnice river is located dovnstream from Suchdol nad Lužnicí). The macroinvertebrate benthic communities in the sites with occurence of A. aestivalis include larvae of following species of water insects: Cloeön dipterum, Baetis vernus, Ephemera danica, Ephemerella ignita, Heptagenia sulphurea (Ephemeroptera); Isoperla cf. rivulorum, Leuctra cf. albida (Plecoptera); Hydropsyche pellucida or incognita, H. angustipennis, Limnephilus sp., Molanna angustata, Polycentropus flavomaculatus, Potamophylax sp. (Trichoptera). Dominant and most abundant insects were Hydropsyche larvae. It is possible to suppose that the larvae of Baetis, Ephemerella (Ephemeroptera) and Hydropsyche (Trichoptera) larvae are prefered prey of A. aestivalis in the investigated area. The Lužnice river is characteristic by often floods including the destructive ones. Chemical parameters of water change espec
Cryptococcus neoformans virulence factors
Bauer, Martin ; Kuthan, Martin (advisor) ; Abrhámová, Kateřina (referee)
Cryptococcus neoformans is an opportunistic pathogenic yeast causing around 600 000 deaths annually. Its ability to cause a chronic infection is given by multiple virulence factors, which include the ability to grow in high temperature, polysaccharide capsule, oxidative stress tolerance and the expression of surface proteins. Unusual and resistant titan cells, which develop through the process of titanization, and the process of phenotypic switching can also be included. Despite intensive research, these virulence factors are yet to be fully described. Inducing factors of titan cells and participating signalling pathways are known. However, a complete model of titanization does not yet exist. So far, the mechanism of phenotypic switching is also unknown. In this work the current knowledge of virulence factors of C. neoformans is presented and summarised.
Phenotypic switching and cell differentiation in yeast Cryptococcus neoformans
Bauer, Martin ; Kuthan, Martin (advisor) ; Abrhámová, Kateřina (referee)
Cryptococcus neoformans is an opportunistic pathogenic yeast causing around 600 000 deaths annually. Its ability to cause a chronic infection is given by the emergence of different morfotypes. These morphotypes differ in cell structures and mechanisms (virulence factors) which have an influence on the resistance to stress factors encountered in the host. This work first describes molecular mechanisms of formation of these virulence factors. Next, it presents morphotypes occurring during infection and the hypovirulent pseudohyphal morphotype. However, this morphotype is interesting because of a modification in the signalisation leading to its manifestation. Finally, described signalling pathways present possible ways of regulating the virulence factors, and so the manifestation of different morphotypes. Understanding these signalling pathways could ultimately lead to improving the development of new drugs, given that Cryptococcus neoformans is highly resistant to the existing ones. Keywords: Cryptococcus neoformans, phenotypic switching, titan cells, cell differentiation, virulence, Vad1, Rim101, Usv101, RAM
The conception of power unit arrangemet on aircraft
Bauer, Martin ; Klement, Josef (referee) ; Píštěk, Antonín (advisor)
This bachelor´s thesis deals with conceptions of the power unit arrangements on aircrafts. There is an overview of the conceptions in the various categories of the aircrafts. It brings out the advantages and the disadvantages in terms of aerodynamics, strength, design, operational performance and safety.

See also: similar author names
4 BAUER, Martin
1 BAUER, Miroslav
12 Bauer, Michal
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