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Surface treatment of cementitious systems by silicate sealers
Iliushchenko, Valeriia ; Šoukal, František (referee) ; Kalina, Lukáš (advisor)
Impregnace na bázi silikátů se široce používá k ochraně betonu před agresivním prostředím. Pochopení aspektů týkajících se tohoto typu impregnace však není zcela jasné. Tato práce představuje informaci o jednotlivých vlastnostech vybraných křemičitanů, přesněji draselného, sodného, lithného a koloidního oxidu křemičitého (koloidní silika), dále o účinnosti z hlediska nasákavosti, stupni účinku na hydrataci cementu, schopnosti těchto látek uzavřít póry a jejích vliv na mikrostrukturu cementového substrátu a na penetrační schopnost. Účinnost filmotvorných látek byla hodnocena jak na čerstvém cementovém tmelu, tak na vyzrálejším, aplikovaných po 1 a 24 hodinách od smíchání směsi. K dosažení kvalitativních výsledků byly použity instrumentální metody, jako je rtuťová porosimetrie, rheometrie, izotermální kalorimetrie, rentgenová difrakční analýza a skenovací elektronová mikroskopie. S ohledem na provedené testy byla prokázána určitá účinnost ošetřujících přísad. Výsledky všech testů ukázaly vyšší účinnost těchto látek v případě ošetření na vyzrálejším cementovém povrchu, což bylo pravděpodobně způsobeno vyšším stupněm hydratace, díky čemuž se vytvořily nové fáze, se kterými silikáty byly schopné zareagovat a jistým způsobem ovlivnit mikrostrukturu.
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The study of hydration of RPC (Reactive Powder Concretes) in hydrothermal condition
Dvořáková, Tereza ; Koplík, Jan (referee) ; Šoukal, František (advisor)
The diploma thesis deals with the study of hydration of reactive powder concrete under hydrotermal conditions. The theoretical part describes the properties of materials and additives used for the preparation of mixtures. The following describes the principles and requiments for the materials for preparing the reactive powder concrete. The practical part is studied design method mix and the impact of materials to the consistency of paste. The effect of cample placement on flexural and compressive strength of the prepared mixtures was observed. The samples were stored under standart laboratory conditions and under hydrothermal conditions. The phase composition of the samples was monitored by X-ray diffraction analysis and the mocrostructure by scanning electron microscopy.
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New methods of in vivo monitoring and management of colonic anastomoses leak in experimental study
Kalvach, Jaroslav ; Pohnán, Radek (advisor) ; Kala, Zdeněk (referee) ; Klos, Dušan (referee)
The primary aim of the project was to assess two different minimally invasive techniques (Transanal minimally invasive surgical approach - TAMIS and endoscopic closure) in the treatment of colorectal anastomosis dehiscence on an experimental model. The secondary aim was to evaluate microdialysis (MD), and confocal laser endomicroscopy (CLE) as novel methods potentially suitable for postoperative monitoring of colo-rectal anastomosis. In the first step, large animal model of dehiscent colo-rectal anastomosis was developed. Two novel techniques of dehiscence closure were then compared with conventional surgical repair and laparotomy with anastomotic diversion. Thus 4 intervention groups and one untreated control group were included. Transanal repair using TAMIS and endoscopic closure were technically feasible with high healing rate. Both techniques reduced the incidence of intra- abdominal septic complications compared to control. With regards to secondary aim, colorectal anastomosis was monitored using MD and CLE before and after the induction of ischaemia. Moreover, intramural and serosal positioning of MD sensors were compared. Both methods revealed hypoperfusion of anastomosis promptly and were proven as suitable for early detection of impaired healing. Based on the results of this project, a...
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The first treatment of a newborn after delivery in pre-hospital care
KOFROŇOVÁ, Erika
The bachelor's thesis discusses the treatment of a newborn after birth in pre-hospital care. In order to elaborate the bachelor's thesis, four objectives were defined. The first objective was to find out how paramedics prepare themselves for taking care of the newborn. The second objective was to record how they handle the situationS psychologically when it comes to the newborn care at fieldwork itself. Furthermore, the third objective ascertained the procedure of the newborn treatment by paramedics in pre-hospital care. Last but not least, the fourth objective was to explore the procedure of a premature newborn treatment. Four research questions were chosen for the research part of the thesis. The first research question dealt with how paramedics prepare themselves for taking care of newborns. The second research question carried out how stressful treating a newborn is for paramedics. The third research question examined the process of treating a newborn. The last research question discusses the treatment procedure in case of the premature newborn. This work highlights the importance of education and implementation of the defined procedure of the newborn treatment in pre-hospital care, as well as the implementation of the most essential interventions which leads to the correct adaptation of the newborn to the new environment. The bachelor's thesis is divided into a theoretical and a practical part. The theoretical part is divided into five main chapters. The first chapter deals with the legal definition of the emergency medical treatment services, pre-hospital emergency care and the profession of a paramedic itself. The competences of a paramedic as well as further educational possibilities are discussed here. In the second chapter, the issue of the childbirth is introduced alongside the labour process itself, its classification, and particular stages. It is complemented by the process of the childbirth and the treatment of the newborn in a health facility as well. The third chapter deals with the childbirth in pre-hospital care. The fourth chapter discusses the various complications that can arise during the birth. The last one describes the care of the pathological newborn and the process of a resuscitation. In the second part of the thesis a qualitative research was applied. The research sample consisted of 8 paramedics who had encountered a newborn after the birth at least once.
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Sutin search
Chvátal, Štěpán ; Fiala, Miloš (advisor) ; Vilášek, Josef (referee)
Title: Rubble search Objectives: The aim of this bachelor's thesis is to get acquainted with the concept of rubble search, description of components working with dogs and subsequent use in the field. Description the training of dogs for rubble search is also the taks. Methods: The work is purely theoretical, so the main method is to work with the literature and compare different theoretical approaches to the issue. Task: The task is to acquaint the work of cynologists in the deployment of rubble search. Field training is very important, so the goal is to describe it properly. Keywords: dog, rubble, search, rescue
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Conservation procedure for the protection and treatment of chromolithographic prints on paper refined by coating
Chadimová, Martina ; Vlčková, Lucie ; Franc, Jan ; Vávrová, Petra ; Ruml Fortelná, Irena ; Kubíčková, Markéta
In conservation and restoration practice, the issue of chromolithographic prints on refined paper is a non-trivial area to which systematic attention has not yet been paid. The absence of reference sources and case studies on this subject results from the fact that these objects – artifacts and documents – have not been preserved in great numbers in collecting and memorial institutions, and not much importance has been attributed to them within such collections. The rarity of the preservation of valuable chromolithographs in collecting institutions is complicated by their often problematic condition and the frequent damage resulting from the specifics of the chromolithographic process. Although after continuous improvement it was possible to print on almost anything, the most valuable picture posters were printed almost exclusively on “refined” paper. The “refined” coating on this paper, characteristic of chromolithography, as well as the final, transparent “lacquer” layer, cause many problems in terms of restoration, and many physical and chemical risks arise from the layering and interaction of the materials used. The established conservation and restoration procedures in the common practice of collecting institutions have not yet taken into account these very specific issues. The conservation procedure itself involves both theoretical and practical aspects. The section dealing with theoretical aspects summarizes the knowledge necessary to determine how to design conservation and restoration interventions and what constitutes the proper care of chromolithographic prints on refined paper. The introductory section provides many tools for the identification of such prints, including an historical excursion into printing technology and the production of refined coated paper. Rich pictorial documentation serves as a visual aid for recognizing the basic (most common) types of chromolithographs and for identifying paper types based on the damage incurred. The theoretical aspects deal in more detail with the process of refining paper by coating it, with regard to the chemical composition of the substances used, and provides an overview of such binders and pigments. An overview of the factors influencing the degradation of paper is summarized in a separate text dealing with external degradation factors (humidity, temperature, light) and internal ones (hydrolysis of the glycosidic bond, oxidation and photochemical reactions of cellulose, oxidation and photooxidation of hemicelluloses, photolysis and the photooxidation of lignin). The theoretical starting points for the conservation procedures in practice therefore explain the operation of the methods applied in the procedure. The focus is on the preservation of prints containing acidic materials, i.e., on de-acidification methods, such as in situ de-acidification in vacuum packages, the Papersave Swiss technology, and the MMMK method. The optimal variants of the conservation procedures for chromolithographic prints on refined paper are presented in a practical methodological manual based on theoretical analysis of the issue. The first practical step is the macroscopic and microscopic analysis of the physical condition of the examined print and production of a digital record. The output of that procedure is the identification of the material and a thorough assessment of the recorded types of damage, as well as the stage of degradation. As a useful practical guide, a categorization of types of damage according to the conservation procedure they require has been prepared. The record of these facts is the starting point for each conservation protocol and yields supporting information for the choice of a subsequent conservation procedure. The proposed conservation procedures include pH measurement and the subsequent adjustment, gluing and follow-up care. The procedure concludes with a proposal for optimal storage.
Fulltext:  PDF
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The study of hydration of RPC (Reactive Powder Concretes) in hydrothermal condition
Dvořáková, Tereza ; Koplík, Jan (referee) ; Šoukal, František (advisor)
The diploma thesis deals with the study of hydration of reactive powder concrete under hydrotermal conditions. The theoretical part describes the properties of materials and additives used for the preparation of mixtures. The following describes the principles and requiments for the materials for preparing the reactive powder concrete. The practical part is studied design method mix and the impact of materials to the consistency of paste. The effect of cample placement on flexural and compressive strength of the prepared mixtures was observed. The samples were stored under standart laboratory conditions and under hydrothermal conditions. The phase composition of the samples was monitored by X-ray diffraction analysis and the mocrostructure by scanning electron microscopy.
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Chroust maďalový (Melolontha hippocastani F.) – hospodářský význam a možnosti eliminace škod v gradačním území LS Strážnice
Opavský, Tomáš
The aim of this work was to evaluate the amount of damage caused by the grubs of forest cockchafer. The damage was assessed in relation to the habitat conditions of the mining and cultivation practices. The pilot plant treatment of Actara 25 WG and Force 1.5 G was evaluated for efficacy against 2nd and 3rd grub instars. A methodical design of aerial intervention to inhibit the forest cockchafer during the 2019 swarming was drawn up. When evaluating the amount of damage, 59,233 pieces of seedlings were checked in 2017. The pilot plant treatment was applied to 4 473 pieces of seedlings and the application was carried out in seven different variants on three districts of the Forestry Administration in Strážnice. The average amount of damage caused by the infestation of forest cockchafer grubs in the Forestry Administration in 2016–2018 is 36%. The Actara 25 WG applied by irrigation was evaluated as the most efficient variant during pilot plant treatment. Based on the vegetation inspection and the extent of the damaged area, an aerial intervention was proposed in two variants to inhibit the forest cockchafer swarming in 2019.
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Dřeviny využitelné pro tvarované živé ploty
Kubátová, Lucie
This bachelor thesis is about woody plants which can be used for shaped hedges. In the beginning of this thesis is summary of hedge usage history, then the hedges are split into several categories as a free-growing and shaped, low, medium and high hedges and coniferous, evergreen and deciduous hedges. Following is description of planting, cutting and treatment after planting and treatment in the coming years. Second part of this bachelor thesis contains description of woody species that are used for planting shaped hedges. The following is a proposal of an assortment of woody species that could be used in a shaped hedge. There are also tables with trees that are offered by selected ornamental nurseries in ČR for planting a shaped hedges. At the end, there is a pictures attachment and a discussion that evaluates the topic of shaped hedges. Keywords: shaped hedges, woody, planting, care.
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Surface treatment of cementitious systems by silicate sealers
Iliushchenko, Valeriia ; Šoukal, František (referee) ; Kalina, Lukáš (advisor)
Impregnace na bázi silikátů se široce používá k ochraně betonu před agresivním prostředím. Pochopení aspektů týkajících se tohoto typu impregnace však není zcela jasné. Tato práce představuje informaci o jednotlivých vlastnostech vybraných křemičitanů, přesněji draselného, sodného, lithného a koloidního oxidu křemičitého (koloidní silika), dále o účinnosti z hlediska nasákavosti, stupni účinku na hydrataci cementu, schopnosti těchto látek uzavřít póry a jejích vliv na mikrostrukturu cementového substrátu a na penetrační schopnost. Účinnost filmotvorných látek byla hodnocena jak na čerstvém cementovém tmelu, tak na vyzrálejším, aplikovaných po 1 a 24 hodinách od smíchání směsi. K dosažení kvalitativních výsledků byly použity instrumentální metody, jako je rtuťová porosimetrie, rheometrie, izotermální kalorimetrie, rentgenová difrakční analýza a skenovací elektronová mikroskopie. S ohledem na provedené testy byla prokázána určitá účinnost ošetřujících přísad. Výsledky všech testů ukázaly vyšší účinnost těchto látek v případě ošetření na vyzrálejším cementovém povrchu, což bylo pravděpodobně způsobeno vyšším stupněm hydratace, díky čemuž se vytvořily nové fáze, se kterými silikáty byly schopné zareagovat a jistým způsobem ovlivnit mikrostrukturu.
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