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Intranet Design to Support Internal Business Processes
Francová, Nela ; Petráš, Dušan (referee) ; Kříž, Jiří (advisor)
This bachelor thesis deals the database design of intranet solution to support business processes in a selected company. In the first part the thesis deals with the explanation of basic terms and methodologies. Then it describes analysis of the current situation in the company. Based on this analysis and also on requirements of company management I proposed the database design of intranet to streamline business operations.
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Effect of terminal electron acceptors on biogeochemical processess and phosphorus cycle in sediment
Jan, Jiří ; Borovec, Jakub ; Petráš, D. ; Osafo, Nana O. A. ; Tomková, Iva ; Hubáček, Tomáš
This study focuses on the phosphorus (P) release from sediment of inflow part of Vranov reservoir under different availability of terminal electron acceptors, mainly dissolved O2 and NO3-. To understand the cycling of P in sediments, sediment cores were incubated for five weeks in three parallel variations that simulated: i) anoxia with depleted NO3-, ii) O2 saturated water column and iii) O2 saturated water column in the presence of high concentrations of NO3-. Evaluating the release of P and the impact of Iron (Fe) and its metabolism in sediment under the different conditions, water above the sediments was monitored, porewater composition and different P fractions in the sediment were analyzed.
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Intranet Design to Support Internal Business Processes
Francová, Nela ; Petráš, Dušan (referee) ; Kříž, Jiří (advisor)
This bachelor thesis deals the database design of intranet solution to support business processes in a selected company. In the first part the thesis deals with the explanation of basic terms and methodologies. Then it describes analysis of the current situation in the company. Based on this analysis and also on requirements of company management I proposed the database design of intranet to streamline business operations.
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Bacteria deactivation and removal from Wastewater and polluted Air
Kimmer, D. ; Vincent, I. ; Dudák, J. ; Bergerová, E. ; Petras, D. ; Lev, J. ; Holba, Marek ; Kalhotka, L. ; Mikula, Přemysl ; Kořínková, R. ; Kubáč, L.
Procedures permitting to prepare homogeneous functionalized nanofibre structures based on polyurethanes modified by phthalocyanines (PCs) by employing a suitable combination of variables during the electrospinning process are presented. Compared are filtration and bacteria deactivation properties of nanostructures without PCs, modified in bulk and with PCs embedded into polyurethane chain by a covalent bond protecting the release of active organic compound during the filtration process. Finding that the functionalized nanofibre structures have an effect on bacterial growth was confirmed by microbiological, physico-chemical and molecular biological analyses, such as the inoculation in a nutrient agar culture medium, flow cytometry and real-time polymerase chain reaction.
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Effect of Morphology of Nanostructures to Filter Ultrafine Particles
Kimmer, D. ; Vincent, I. ; Fenyk, J. ; Petráš, D. ; Zatloukal, M. ; Sambaer, W. ; Ždímal, Vladimír
Selected procedures permitting to prepare homogeneous nanofibre structures of the desired morphology by employing a suitable combination of variables during the electrospinning process are presented. A comparison (at the same pressure drop) was made of filtration capabilities of planar polyurethane nanostructures formed exclusively by nanofibres and space nanostructures having bead spacers or structures formed by a combination of micro-and nanofibres, through which ultrafine particles of ammonium sulphate 20 - 400 nm in size were filtered. The structures studied were described using a new digital image analysis technique based on black and white images obtained by scanning electron microscopy.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22013111915280 - PDF
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Preparation and Characterization of Nanofibrous Catalysts for Environmental Applications
Soukup, Karel ; Topka, Pavel ; Hejtmánek, Vladimír ; Petráš, D. ; Šolcová, Olga
The aim of the study was focused on detailed description of the influence of the preparation of palladium and platinum catalysts supported on polymeric nanofibers based on poly(2,6-dimethyl-1,4-phenylene) oxide on their catalytic performance. The catalytic activity of the prepared electrospun catalysts was investigated by means of model reaction based on total oxidation of methanol. Nanofibrous catalyst supports were prepared by electrospinning technique, which represents currently the most using method to produce polymeric nanofibrous mats. This technique is based on the polymeric fiber elongation under the influence of the electrostatic field between two opposite charged electrodes (capillary electrode and the grounded plate).
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22013110613400 - PDF
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Photo-Electrochemical Properties of Hierarchical Nanocomposite Structure: Carbon Nanofibers/TiO2/ZnO Thin Films
Hubička, Zdeněk ; Kment, Štěpán ; Gregora, Ivan ; Čada, Martin ; Olejníček, Jiří ; Klusoň, Petr ; Petras, D. ; Krýsa, J. ; Jastrabík, Lubomír ; Dytrych, Pavel
In this contribution we report on photoelectrochemical functionality of the multilayers system consisting of CNF's/photoactive anatase TiO2/ conductive ZnO thin films. Recently the thin phthalocyanines films has been prepared and studied individually.
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Application of Nanofibres in Filtration Processes
Kimmer, D. ; Vincent, I. ; Petras, D. ; Fenyk, J. ; Zatloukal, M. ; Sambaer, W. ; Slobodian, P. ; Salmela, H. ; Lehtimaki, M. ; Ždímal, Vladimír
The metod making possible to achieve the requireed of the nanofibres is demonstrated on the influence of telative humidity and solvent type on the fibre- forming process taking place in an electrostatic field. the effect of homogenity of the nanofibre deposition on the collection substrate is assessed empoying images from scanning electron microscopy (SEM) and tests of filtering abilities oh the nanofibre layers. Also, some measurements obtained when nanofibres were used in filtation of air, liquids and dispersions of carbon nanotubes in a liquid are presented.
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