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Influence of the Temperature on the Dielectric properties epoxy with ground mica
Ráček, Tomáš ; Havlíček, Svatopluk (referee) ; Polsterová, Helena (advisor)
The paper is focused on theoretical analysis of the basic characteristics of dielectrics, especially on the examination of these qualities at samples of epoxy sealing compound filled with powder mica, and their dependance on the temperature and the content of filling in the material. The measured quantities are inner resistivity, relative permitivity, and loss factor. The paper also deals with the sensitivity of the material to humidity, and through the influence of humidity to the other measured quantities.
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Behaviour of varnish composite in various environmental condtions
Kadlec, Michal ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
The diploma thesis is focused on the preparation of test samples of paint-filled micronized mica and analysis of electrical properties of insulating material values in different environmental conditions. For this purpose, it was created five sets of composite paint primers with different ratio of mica. Samples were gradually exposed to the environment relative humidity of 0%, 33%, 55%, 65% and 75%. For each environment with a defined moisture characteristics were observed in samples exposed to the temperature of 20 to 50 ° C. The diploma paper analyzed the influence of the mass implementation of mica in each set of samples and placed on the surface structure of samples.
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Modification of electroinsulating varnish with ground mica
Drápal, Aleš ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
This master's thesis focuses on composite systems based on varnish combined with different filler ratios of micronized mica. The aim is to analyse impact of the filler on dielectric properties of the varnish, i.e. relative permittivity and loss factor as functions of frequency as well as charging and discharging currents as functions of time. Dielectric mixture formulas are applied on relative permittivity values. Calculated and measured values are compared.
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Impact of the climatic conditions upon the varnishes properties
Mikoláš, Jiří ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
This bachelor's project analysis influence of moisture absorption on dielectric properties of composite material, which was exposured various relative humidity. The composite material consist of epoxide varnish EPOXYLITE TSA 220S by company Epoxylite Ltd. with various weight percentage number micro-ground mica. This experiment was carried out by dielectric relaxation spectroscopy with frequency range from 100 Hz to 1 MHz. Elementary results of this project are composite material frequency dependencies of component part of complex permittivity.
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Activating antitumor immune response using bispecific fusion proteins
Chytrá, Gabriela ; Vaněk, Ondřej (advisor) ; Černá, Věra (referee)
Natural killer (NK) cells are lymphocytes of the innate immune system that recognize and eliminate transformed and potentially harmful cells in a mechanism termed immunosurveillance. Malignant cells strive to escape immunosurveillance, and if successful, oncological disease develops. To restore immune recognition, immunotherapy utilizing NK cell-directed therapeutic fusion proteins can be employed. Therapeutic fusion proteins target tumour markers expressed on the surface of malignant cells and, at the same time, stimulate immune response through binding to NK cell activating receptors, for example receptor NKG2D or NKp30. A relevant example of a tumour marker is the HER2 receptor, which is often overexpressed in several types of cancer, most notably breast carcinoma. This thesis describes the preparation of several bispecific fusion proteins with potential use in immunotherapy. Bispecific fusion proteins consist of an NK cell activating ligand (ligand MICA or B7-H6) and nanobody targeting selected tumour marker (receptor HER2), which are connected by flexible glycine-serine linker. The constructs of fusion proteins were prepared in two configurations - with nanobody located on the N-terminus and the ligand on the C-terminus and vice versa. In addition, bispecific fusion proteins introducing...
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Preparation of a polymeric therapeutic targeting CD20 positive B-lymphomas and NK cells
Hejl, Maxmilián ; Vaněk, Ondřej (advisor) ; Bělonožníková, Kateřina (referee)
Malignant transformation of B-cells is manifested by a marked increase in the number of surface markers 20 (CD20, cluster of differentiation 20). In studying this trend, chimeric monoclonal antibodies targeting CD20 were introduced to induce apoptosis in B-lymphomas. Since the introduction of the first therapeutic monoclonal antibody rituximab, many others have been developed, with some still used to treat B-lymphomas today. Unfortunately, in many cases, resistance to these drugs is developing, and therefore the development of new types of therapeutics is still relevant. This work aims to develop a polymer-protein macromolecular conjugate capable of inducing apoptosis in CD20 positive leukemia cell lines. For this purpose, we work with biologically active vectors, so-called anti-CD20 nanobodies. This is a variable binding domain derived from the "heavy chain only" antibodies found in, e.g., llamas or camels. Compared to conventional antibodies, nanobodies are approximately ten times smaller, but their binding affinity for the antigen is not altered. For this reason, nanobodies are ideal candidates for attachment to a polymeric carrier, where poly-N-[2-(hydroxypropyl)methacrylamide] (pHPMA) was chosen in this work. The transpeptidase reaction catalyzed by recombinant sortase A, which recognizes and...
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Decentralized Finance from the Perspective of Czech Financial Regulation and MiCA Proposal
Koliba, Viktor ; Sejkora, Tomáš (advisor) ; Kotáb, Petr (referee)
1 Decentralized Finance from the Perspective of Czech Financial Regulation and MiCA Proposal Abstract Decentralized Finance constitutes a new system for allocating resources by using irreplicable digital data that can be processed within a predefined framework of automatic operations based on blockchain technology. Its development has brought not only new economic opportunities but also a number of risks and legal issues. Since Decentralized Finance is in its early stages, relevant legal questions relating to its positioning within the existing and forthcoming legal frameworks are still not firmly established yet. This thesis aims to answer those relating to the applicability of selected Czech financial regulations and the European Commission's Proposal for a Regulation of the European Parliament and of the Council on Markets in Crypto-assets, as well as validate the hypothesis that the wide scope of the MiCA Proposal could influence the ecosystem of Decentralized Finance. First, the important technical foundations of Decentralized Finance and their specifics were outlined, and relevant financial applications were established for further assessment. Subsequently, the applications were compared with the scope of the chosen Czech financial regulation, namely the Act on Payment System, the Act on Currency...
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Financial Aspects of Global Payment Systems
Moravec, Jiří ; Kohajda, Michael (advisor) ; Boháč, Radim (referee) ; Papoušková, Zdenka (referee)
Financial Aspects of Global Payment Systems Abstract This dissertation summarizes findings on Digital Asset's development, which would fit under the era of Blockchain 1.0. We analyzed and synthetized available resources focusing on the following areas: (i) historic aspects of Digital Assets, (ii) technical solutions of Digital Assets, (iii) actual use of Digital Assets, (iv) abuse of Digital Assets, (v) Digital Assets' legal integration, (vi) Digital Assets as a global payment system. Analyzing history of Digital Assets, we summarize that Digital Assets were developed with the intent to liberate payment systems from existing financial supervision. Once such system became functional it was immediately abused. In connection with technical solutions, we find that as technical complexity of Digital Assets (especially the lack of the trusted third party) diminishes protection of Digital Assets users, it incentivizes criminal activity. Consequently, Digital Assets are vastly abused for different criminal purposes, including development of services dedicated to criminal activity, such as Dark Web Marketplaces or Digital Assets Mixer. Further, Digital Assets are used for payments on minimal scale, and the retail use if practically nonexistent. Currently, Digital Assets' legal integration is slow and fractional;...
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