Filtration efficiency of nonofiber cloth

V této bakalářské práci se zabývám filtrační účinností tkaniny z nanovlákna, která se stanoví pomocí počtu částic aerosolu naměřených před a za filtrem pomocí přístroje APS. Aerosol je generován přístrojem CMAG. Dále se v této práci zabývám rešeršní studií na téma filtrace částic mikrometrových rozměrů.In this bachelor thesis I deal with filtration efficiency of nanofiber cloth, which are determined by number of aerosol particles measured in front of the filter and behind the filter using APS. Aerosol particles are generated by CMAG. The next topic of this thesis is a search of particle filtration of micrometer size.

Psychology and its Application in Tourism

AbstractThe aim of this paper is to describe the importance of application of psychological and sociologic know-how in tourism practice. Primarily, it is the understanding of clientś motivation to visit particular destination, use available services, clientś needs and satisfaction. The paper describes relations between individual levels of human needs (using Maslow's hierarchy of needs). At the end of the paper the author notes that despite of the all benefits of psychology to tourism, in practice it is used primarily by large companies, or by regional institutions. Entrepreneurs, who make majority of business subjects in tourism, prefer practical information and instructions

The Women in Science in the Countries of European Union

We live in a time, when few people concern of that, why is so few women in the science; although nowadays is coequality between men and women. We would not to forget the reality; that women could have to study on the universities only from the 19th century. That could be one of the reasons, why nowadays is so few women in science. Certainly, the other reason is the fact; that women in history didn´t signify more in the society. Their maximal success in their life was to perform the position of the mother and wife. Their role was the nascence children, so that the parentage would be well-preserved and would not threaten the decrease of population; and not last one reason was the care about the household. The resource to employ was the utopian soon. The man was the bread-winner. In 19th century were the women too, those attended the educational institutions, the private or the public too. They were the women; those had to perform the wife-position of some officer, higher positioned man, in the future. The thinkers of enlightenment performed the opinion, that women can´t study and to develop the science, because they are very emotional. This description belongs to antipoles in the science, those the scientists’ couldn´t have to know. The most important in the science is the rationality and the objectivity; and especially these descriptions have men better developed

Crowd security management

Tématem této bakalářské práce je řízení bezpečnosti davu. Teoretická část práce se věnuje popisu davu z psychologického hlediska. Taktéž jsou zde uvedeny donucovací prostředky, které mohou dle zákona použít policisté České republiky. Následně jsou na začátku praktické části uvedeny a rozebrány demonstrace proti koronavirovým opatřením, které v České republice proběhly. Závěr praktické části je věnován modelové situaci, kde je popsán scénář zásahu při demonstraci, do kterého byl zapracován návrh na zlepšení.The topic of this bachelor thesis is crowd security management. The theoretical part is devoted to the description of the crowd from a psychological point of view. There are also coercive means that can be used by the police of the Czech Republic according to the law. At the beginning of the practical part are presented and analyzed demonstrations against coronavirus measures that took place in the Czech Republic. The conclusion of the practical part is devoted to the model situation, which describes the scenario of demonstration and in which a proposal for improvement was incorporated intervention of police.060 - Katedra bezpečnostních služebvelmi dobř

The role of extracellular matrix in mesenchymal stem cell biology

Cílem této bakalářské práce je popsat vzájemné vztahy mesenchymálních kmenových buněk a extracelulární matrix, jejich komunikaci a poukázat na jejich důležitost v živém těle. V první části se tato práce zaměřuje na popis extracelulární matrix, jejích komponent a vlastností. Rozebírá se její komunikace s okolními buňkami, jak pomocí receptorů, tak i enzymů. V další části jsou popsány mesenchymální kmenové buňky, jakožto významní producenti složek extracelulární matrix, která je zároveň rozhodující složkou niky kmenových buněk, prostoru, který obklopuje a chrání kmenové buňky a ovlivňuje jejich další osud. Poslední část formou příkladů popisuje možnosti využití diferenciačního potenciálu a parakrinní sekrece MSC v terapii a rovněž popisuje možná rizika, která jejich použití přináší.The aim of this bachelor thesis is to describe the mutual relations of mesenchymal stem cells and extracellular matrix, their communication and to point out their significance in living body. First part is focused on description of extracellular matrix, its components and characteristics. The interaction between extracellular matrix and surrounding cells is using both receptors and enzymes. Second part addresses the description of mesenchymal stem cells which are crucial producers of extracellular matrix. The matrix is also decisive part of stem cells niche which envelopes them, protects them and decides their future. The last section demonstrates possible utilizations of differentiation potential and paracrine secretion of MSC in therapy and identifies some of the risks bound to it.Department of Cell BiologyKatedra buněčné biologieFaculty of SciencePřírodovědecká fakult

Arabidopsis mutants reveal multiple singlet oxygen signaling pathways involved in stress response and development

Shortly after the release of singlet oxygen (1O2) in chloroplasts drastic changes in nuclear gene expression occur in the conditional flu mutant of Arabidopsis that reveal a rapid transfer of signals from the plastid to the nucleus. Factors involved in this retrograde signaling were identified by mutagenizing a transgenic flu line expressing a 1O2-responsive reporter gene. The reporter gene consisted of the luciferase open reading frame and the promoter of an AAA-ATPase gene (At3g28580) that was selectively activated by 1O2 but not by superoxide or hydrogen peroxide. A total of eight second-site mutants were identified that either constitutively activate the reporter gene and the endogenous AAA-ATPase irrespectively of whether 1O2 was generated or not (constitutive activators of AAA-ATPase, caa) or abrogated the 1O2-dependent up-regulation of these genes as seen in the transgenic parental flu line (non-activators of AAA-ATPase, naa). The characterization of the mutants strongly suggests that 1O2-signaling does not operate as an isolated linear pathway but rather forms an integral part of a signaling network that is modified by other signaling routes and impacts not only stress responses of plants but also their developmen