National Repository of Grey Literature 69 records found  previous11 - 20nextend  jump to record: Search took 0.01 seconds. 
Tools Made from Cemented Carbide
Opršál, Ladislav ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
The thesis focuses on cutting tools made of both coated and uncoated cemented carbides. The first part of the thesis deals with the division of materials used for the production of the tools. The second part of the thesis introduces uncoated cemented carbides, special attention being paid to the labelling, production and properties of such compounds. The third part of the thesis presents coating deposition techniques and examines the properties of coating layers. Coating layers are produced using two different methods – CVD and PVD. The last part of the thesis compares the properties of the cutting tools (e.g. their cutting values) produced by the companies Pramet Tools, Sandvik – Coromant and Seco Tools.
Optimization of production of thin films of metallic materials
Čejka, Marek ; Kadlec, Michal (referee) ; Šubarda, Jiří (advisor)
The present thesis deals with optimization of the formation of thin layers of metallic materials. In the theoretical part was elaborated overview of the implementation of the formation of thin- film structures, particularly using vacuum techniques. Chemical and physical vapor deposition. They were described methods of pretreatment of thin layers. The findings were discussed methods of controlling the pre-treated surface, quality control and mutual adhesion of coating layers. In the experimental part of the pre-treatment methods were selected and applied to selected substrates. Pretreatments were evaluated using a control surface by wetting angles and by atomic force microscopy. Then, the metal structure formed of copper on the pretreated substrates. Implementation by means of magnetron sputtering. Adhesion layers was checked by testing the surface lattice method. The quality was observed by scanning electron microscopy. The results were used to design the technological process of making metal layers.
Possibilities of using recycled materials for the green roofs constructions
Skalková, Markéta ; Žák, Antonín (referee) ; Žižková, Nikol (advisor)
This bachelor thesis deals with the issue of using recycled building materials in the green roofs. It studies the history, function, benefits and negative impacts, composition, division and structural layers of green roofs. The work describes the production, application and common features of recycled building materials. It determines the basic properties of selected recyclates and evaluates their partial suitability as some of the layers of a green roof.
Using konduktometric method for conductivity measurement of the corrosive layer of lead alloys
Neoral, Jiří ; Vaněk, Jiří (referee) ; Bača, Petr (advisor)
Lead-acid batteries are the oldest and most common type of secondary cells. Their biggest use is as a power source for a car starter. Bipolar lead-acid batteries could also be used for new applications such as power sources for hybrid electrical vehicles (HEV) for their high power. But there are still many technical problems limiting its use in these applications, which have to be overcome. This could cover parasite reactions as is gas creation, heat removal from the battery and another big problem is substrate corrosion. This diploma thesis concerns the actual state of bipolar lead batteries in the world with detail orientation to substrate corrosion. This thesis describes the conductometric method of lotion conductivity measurement and its modification for measurement of lead grid conductivity. From that we can find out, that when material loses more conductivity, the greater the corrosion. This thesis describes needed preparative experiments for assurance, that the conductometric method can be used for corrosion speed measurement and there are other experiments testing different lead alloys for corrosion speed.
Estimation of biogas production in biogas plant
Heger, Jan ; Vondra, Marek (referee) ; Touš, Michal (advisor)
The focus of this thesis are calculation methods for biogas yield estimation in biogas plant. The aim is to get acquainted with calculation methods and to determine their accuracy by calculation. Refining biogas production estimates can be useful for case studies, feasibility studies, or technical-economic assessments. The available calculation methods are tested on a case study where a comparison with the operational data measured in the biogas plant in Valašské Meziříčí is accomplished using the extended Buswell method and tabulated values. Comparing this case study, a result was obtained where the calculation by the Buswell method reached very accurate values, whereas the calculation by tabulated values differed more from the measured values and the method achieved a less accurate result.
Development and analysis of a database of reactions catalyzed by cytochrome P450 enzymes for machine learning applications
Komorníková, Natália ; Pluskal, Tomáš (advisor) ; Berka, Karel (referee)
Cytochrome P450 enzymes are hemoproteins showing extraordinary di- versity in the reactions they catalyze. We developed a database containing all the needed data to provide a comprehensive data source on reactions cat- alyzed by cytochrome P450 enzymes. This data mainly includes information about the substrates, products of characterized reactions, and the sequence of these enzymes. The database was developed by collecting data from reliable protein and reaction databases like UniProt and RHEA. The work presents an in-depth analysis of the created database of reactions catalyzed by cy- tochrome P450 enzymes. This database can be utilized for future machine learning approaches to predict the function of uncharacterized cytochrome P450s.
Vliv vybraných základních hnojiv na tvorbu kořenového systému okrasných dřevin
Krejčí, Jana
The aim of the thesis was to design an experiment to test the plants Caryopteris cladonensis ,Worcester Gold'. On the basis of this experiment should be carried out assessment of the basic types of fertilizers and their effect on the root system of experimental plants. The Experiment was carried out on 800 pieces of experimental plants, which were divided into four variants, and each variant consisted of four repetitions, so that was captured and the possible influence of the location of the plant. On the experimental plants were observed morphological parameters: the height of the plants, the number of shoots, number of sheets, the volume root, root collar diameter and Visual evaluation of the experimental plant. Evaluation of the results of the experiment on the root system of trees shows that between the versions there is a big difference and at the same time 62 you can assess that all the variants are very suitable for container growing method of experimental plants.
Komparace vybraných pěstebních substrátů při zakořeňování bylinných řízků okrasných rostlin a jejich následné výsadbě
Hrabík, Pavel
This thesis deals with the level of influence of used substrates, during propagation of shrubs by herbaceous cuttings, to quality of their rooting. Also was tested the impact of these substrates for subsequent growth after planting into loose soil. Thesis includes literary section which summarizes information about plant propagation including factors that affect it and informations about substrates. Part of this work is an experiment that is thoroughly described there, including the methodology and results. The first part of the experiment was conducted in two terms and each term contained four variants. Each variant is one of the tested substrates. In these substrates were grown two taxa: Cotoneaster dammeri Schneid. and Cotoneaster salicifolius Franch. Parkteppich. Total it was evaluated nearly 3,500 cuttings. Furthermore it was 400 plants were planted in loose soil and after overwintering were also evaluated their quality parameters. The result of the experiment is that the quality of the substrate has a really affect to the quality of the rooting of cuttings. A major impact on their subsequent growth has not been confirmed.
Thin film systems
Rada, Vojtěch ; Sedlaříková, Marie (referee) ; Zatloukal, Miroslav (advisor)
This bachelor’s thesis is focused on the problematics of thin-film technology. In the beginning the work deals with a general theory of this problematics, discusses various methods and ways to lay a thin film, where more emphasis is placed on magnetron sputtering, which is used in the practical part of the work, and describes procedures that are performed before and after the application of the thin film. The magnetron sputtering coating machine NP-12 and its control are described in the practical part of the work. Subsequently the selection and adjustment of suitable substrates is made, the thin-film system is deposited using the magnetron sputtering method and the analysis of the properties of deposited thin-film samples is done.
Non-conventional bacterial signaling pathways
Krupička, Jiří ; Branny, Pavel (advisor) ; Beranová, Jana (referee)
Two component systems were traditionally considered as main phosphorylation systems of bacteria involved in cell signalling. Recently, attention focuses increasingly on bacterial eukaryote-like Ser/Thr protein kinases (eSTKs). These protein kinases are structurally similar to their eukaryotic counterparts. Some eSTKs possess additional domains such as extracellular PASTA domains that were discovered in a variety of gram-positive bacteria. It has been proved that these domains can act as sensors for unlinked peptidoglycan fragments. However, majority of environmental signal molecules still remains unknown. eSTKs phosphorylate a broad spectrum of substrates including proteins involved in various cell processes such as virulence, cell wall biosynthesis, cell division, and central and secondary metabolism. Cross talk between eSTKs and two component systems also occurs. In this thesis, the current knowledge about eSTKs and their significant substrates in different bacterial species is discussed.

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