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Vliv plazmového výboje na smáčivost semen vybraných kulturních plodin
PIHERA, Pavel
This bachelor thesis deals with the influence of atmospheric (Gliding arc) and low-pressure microwave plasma discharge on the surface of common wheat (triticum aestivum), annual sunflower (helianthus annuus), and pea (pisum sativum) and how the use of plasma discharge affects the ability of water to adhere to the seed surface. In this paper, the wettability of seeds before and after the use of plasma discharge is measured. The wettability is measured according to the angle of the drop applied to the measured seed.
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Study of plasma discharge effect on distilled water pH
KOBRLE, Lukáš
This tesis is concerned with the influence of Gliding arc plasma discharge on the pH of distilled water while using different treatment time and distance between Gliding arc and the surface of distilled water. The theoretical part consists of research into various studies, whose main focus is the practical usage of Gliding arc and the possibilities of its use. The practical part contains the values of the measured quantities, models and graphs illustrating the effects of the process. The conclusion offers a brief summary of the findings and claims, whose correctness needs to be verified in further studies.
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Methods for viability evaluation of Xanthomonas vesicatoria after low temperature plasma treatment
ZEMANOVÁ, Marta
The thesis deals with methods for viability evaluation of the phytopathogenic bacterium Xanthomonas euvesicatoria after low-temperature plasma treatment. Low-temperature plasma produced by Gliding Arc experimental device was used for treatment of X. euvesicatoria. The viability of the bacterial cells was assessed using a scanning electron microscope (SEM) and by measuring of the fluorescence in the Smart-DART device using PrestoBlue chemical reagent. Methodology has been optimised for the sample preparation for the treatment by low temperature plasma and used for evaluation of applied methods. Lethal effect of gliding arc plasma to this gram-negative bacteria was verified by SEM which showed. There is significant structural changes on the cell surface. Viability assessment of X. euvesicatoria using Smart-DART device is a fast, time-saving and inexpensive evaluation of cell viability. The great advantage of this device is its ability to measure the fluorescence in real time. The disadvantage of this method is lower reliability in current stage of research.
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Monitoring of phytopathogenic bacteria viability after low-temperature plasma treatment
ZEMANOVÁ, Marta
The bachelor´s thesis is focused on the monitoring of phytopathogenic bacteria´s viability after low-temperature plasma treatment. Gliding Arc device has been used for the plasma treatment of phytopathogenic bacteria. Evaluation was carried out using chemical reagent PrestoBlue which was followed by spectrophotometric evaluation and calculating CFU/ml from the regression equation derived from the calibration curve. The effect of the low-temperature plasma on the viability of plant pathogenic bacteria was prooved. Gram-negative bacteria Erwinia amylovora and Rahnella aquatilis were the most susceptible to the plasma treatment. These phytopathogenic bacteria belong to the family Enterobacteriaceae. Representatives of gram-positive bacteria showed lower sensitivity to the low-temperature plasma treatment. Suitable method has also been designed for the treatment of phytopathogenic bacteria by the low-temperature plasma at atmospheric pressure.
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Surface roughness measurement
KEHLER, Roman
This thesis deals with surface roughness measurement of polyethylene plates before and after plasma discharge application by Hommel-Tester T2000 contact measurement device. The first section describes basic terms, units and definitions, types of devices and tools used for surface roughness measurement. The next section of thesis is focused on practical measurement of given samples and their surfaces structure evaluation.
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Advanced oxidation processes in environmental applications
OLŠAN, Pavel
The aim of this thesis is the study of application of the synergistic effects of various advanced oxidation processes (AOP) used for decomposition of chemical compounds resistant to biodegradation. The synergistic effect of photocatalytically active material and low temperature plasma were tested in my thesis. Model substances with photocatalytically active material were exposed to atmospheric plasma discharge (Gliding Arc) in order to improve generation of the active hydroxyl groups and oxidation processes. The first chapter of the theoretical part summarizes the knowledge of advanced oxidation processes, their principles and utilization. Next chapters are dedicated to basic summary of titanium dioxide and types of creating the thin films. The last part of theoretical chapter describes the types of plasma discharges. The experimental part describes the equipment for decomposition of chemical compounds resistant to biodegradation using AOP. Next chapter of the experimental part is dedicated to decomposition of organic dye AO7 and antibiotic Verapamil hydrochloride. The last chapter summarizes the results of the experiments.
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Cereals treatment by using of GA atmospheric plasma source
HAVELKA, Zbyněk
This thesis contains a brief summary of the theoretical applications of plasma discharges, and a description of the principle Gliding Arc plasma source. The practical part is focused on the research of the influence ofcereal seed treatment using plasma discharge on their nutritional value (dry matter, ash, protein and fiber). In the conclusion of this thesis is evaluation of the whole experiment.
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Gliding Arc
KALA, Jaroslav
The thesis is focused on increasing the surface tension of polyethylen, using plasma. A gliding arc was chosen for this surface modi cation. The theoretical part includes an overview of gas discharges, their classi cation, properties and technical applications, and deals with an in uence of surface tension on surface modi cations of materials. The experiment is explained in the practical part, a jet analysis carried out before the experiment is described. Results of the experiment are presented.
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