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Nanotechnology utilization in nuclear industry and research
Skalička, Jiří ; Štefánik, Milan (referee) ; Katovský, Karel (advisor)
This thesis introduces reader to current knowledge of nanomaterials and their usage. It summarises production methods and usage of different materials in nuclear power plants, nuclear research and nuclear medicine. Theoretical part of this thesis is dedicated to possible usage of carbon nanotubes for neutron beam collimation and guides. In experimental part different materials were tested in measuring box connected to horizontal radial channel of VR-1 nuclear reactor and their influence on neutron flux was measured. Tested samples were non-oriented carbon nanotubes, carbon nanofibers, alumina nanowires, oriented carbon nanotubes with several angles of rotation and these samples were compared with results of graphite.
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Using the Microscope for Diagnostics of Structure of Materials and Fault El. Equipment
Cvak, J.
The goal of this thesis is to describe the possibility of using a microscope for documentation of defects and innovation of electrical machines. I used an electron microscope to document carbon brushes and nanomaterials for possible upgrade of the sliding contact. Used microscopes gives us detailed information about the structure of materials at locations with the largest stress in the electrical machine. Collected data can be further analyzed and and carbon brushes can be innovated according to the results.
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Consolidation testing of porous limestone using lime nanomaterials: optimization, assessment of stone mechanical and structural characteristics
Macounová, Dana ; Bayer, K. ; Ghaffari, E. ; Navrátilová, Michaela ; Slížková, Zuzana ; Weber, J.
In consequence of an array of degradation mechanisms there is a change of stone characteristics used in historic objects. One of the negative changes is deterioration of mechanical properties, which may often lead to losses of original substance and gradual disintegration of works of art or handcraft made of stone. To prolong the lifespan of such damaged cultural-heritage objects a process called consolidation is often carried out within the framework of conservation treatment. During the process of conservation treatment the damaged stone is impregnated with a consolidating material, which is to provide the stone with a new binder capable of renewing its cohesion to a certain extent. Currently, a wide range of organic and inorganic consolidating agents of various characteristics is available, from synthetic polymers to silicic acid esters. Long-term experience shows that not only is the consolidating effect of the actual agent important, but also its lifespan and impact on the subsequent aging of the treated stone. Thus, in the past few years more emphasis has been laid on the compatibility or – to express it more precisely – the material similarity of the agents used in the process of conservation and restoration of works of art or handcraft.
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Hygiene Problems Associated with Nanoparticles
LHOTSKÁ, Veronika
Nanotechnology is a rapidly developing branch and its popularity quickly ratchets up. Currently, nanomaterials form parts of a range of products of daily consumption. They are put into foodstuffs, cosmetics, and are used in medical science and technical branches. Nanomaterials are being considerably popularized which has helped them to penetrate into the lay public. The information from media are mostly given in a non-professional way and misrepresented, and taken from the context, they have sensationalist and advertising character. My thesis summarizes the basic finding about nanomaterials, their usage in practice and their effect on man´s health. Two hypotheses were fixed: The usage of nanomaterials is medially popularized but the non-professional public is not informed correctly about it. The lay public is not aware of possible negative effects of nanomaterials on man´s health.
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16th International Symposium on Intercalation Compound - ISIC16. Abstracts Book
Zima, Vítězslav ; Kavan, Ladislav ; Čejka, Jiří ; Lang, Kamil ; Vlček, Milan ; Beneš, L. ; Svoboda, Jan ; Melánová, Klára ; Frumarová, Božena ; Knotek, P. ; Jůza, Josef ; Látalová, Petra
The topic of the papers published in this proceedings is chemistry, properties and applications of intercalation compounds and related materials.
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