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Cutting ceramics and its effective use
Podešva, Lukáš ; Dvořáková, Jana (referee) ; Humár, Anton (advisor)
In the first part of this diploma thesis there are discribed basic findings about cutting ceramics (sorts, notation, structure, physical-mechanical properties, using, production) and it evaluates this tool material from the aspect of cutting power. The second part focuses on complex data processing about assortment of ceramics cutting materials of significant tool materials producers and comparison of service conditions (kind of mechanided materials, cutting conditions), which are recommend for effective turning by producers.
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Growth of highly doped ZnO nanowires
Andrýsek, Michal ; Macák, Jan (referee) ; Kolíbal, Miroslav (advisor)
This diploma thesis is about ZnO nanowires growth, their doping and analysis. High temperature and pressure oxidation of brass foil and deposition from effusion cell in oxidative atmosphere utilized for nanowires growth. The growth is affected by different temperature and pressure. It has been shown that under certain experimental conditions nanowires can be prepared by the former method. However, the growth was hindered when effusion cell was used.
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Molecular interaction of developing axons with the surface ectoderm
Matějček, Miroslav ; Machoň, Ondřej (advisor) ; Rozbeský, Daniel (referee)
The complex of cranial nerves consists of twelve pairs of nerves, which connect organs of the head with the central nervous system. One of the organs, which are innervated by cranial nerves are whiskers (also known as vibrissae). Whiskers are special type of mammalian hairs, which are innervated by the infraorbital branch of trigeminal nerve. These hairs provide information necessary for orientation in terrain, localisation of prey and locomotion. The potential role of axons in whiskers development has been discussed for many years. However, this hypothesis has not yet been confirmed. In this research we have used murine strains Neurog1 KO and Meis2 cKO with either abnormal or completely missing trigeminal nerve. Thanks to the analysis of embryonic development in these strains we have denied our hypothesis, that axons of trigeminal nerve serve a role in initiation of whisker follicles. In Meis2 cKO embryos we observed malfunction in formation of whisker follicles. The expression of Meis2 during the development of whiskers has an influence on various signalling cascades including Fgf, Shh and Bmp. In regards to changes in mentioned signalling cascades we suggest that the whisker follicle development is altered between the first dermal and first epidermal signal.
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Growth of highly doped ZnO nanowires
Andrýsek, Michal ; Macák, Jan (referee) ; Kolíbal, Miroslav (advisor)
This diploma thesis is about ZnO nanowires growth, their doping and analysis. High temperature and pressure oxidation of brass foil and deposition from effusion cell in oxidative atmosphere utilized for nanowires growth. The growth is affected by different temperature and pressure. It has been shown that under certain experimental conditions nanowires can be prepared by the former method. However, the growth was hindered when effusion cell was used.
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Cutting ceramics and its effective use
Podešva, Lukáš ; Dvořáková, Jana (referee) ; Humár, Anton (advisor)
In the first part of this diploma thesis there are discribed basic findings about cutting ceramics (sorts, notation, structure, physical-mechanical properties, using, production) and it evaluates this tool material from the aspect of cutting power. The second part focuses on complex data processing about assortment of ceramics cutting materials of significant tool materials producers and comparison of service conditions (kind of mechanided materials, cutting conditions), which are recommend for effective turning by producers.
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