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Study of gel electrolytes properties by MR methods
Mrnka, Michal ; Gescheidtová, Eva (referee) ; Bartušek, Karel (advisor)
Theoretical part of the work deals with explanation of nuclear magnetic resonance phenomenon, relaxation processes in system of nuclear spins, basic techniques for measurement of relaxation times. There are described diffusion and techniques for diffusion coefficient measurement including method for suppressing the background gradient. Experimental part describes preparation of gel electrolytes samples and measurement of relaxation times. Sodium salt was used as a conductive agent. There is interpreted dependence of relaxation times on polymerization times and on concentration of conductive agent in gels.
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Flowering of Day-Neutral Tobacco Nicotiana Tabacum L. as Influended by Transformation with CDC25
Vojvodová, Petra
Plants are sessile organisms and so they cannot escape changes in environmental conditions. In order to optimize seed production and to ensure that flowering occurs during the appropriate season, plants have evolved a complex of regulatory pathways to control when the floral transition takes place. One group of regulatory pathways involves enviromental factors like certain photoperiod or vernalization. The second group of regulatory pathways involves the state of development and is not sensitive to environmental cues, this pathway is called autonomous pathway and plants in this group do not require a particular photoperiod or vernalization, they are called day-neutral plants. The transition of these plants from vegetative to reproductive phase depends on combination of reaching certain minimal number of nodes, inhibition effect of roots, floral signals generated by leaves and activity of the shoot apical meristem (SAM). Among early events of the transition of SAM to reproductive phase belongs an increase in the mitotic activities of the cells in SAM. Precise mechanisms of the action of the signals connected with transition of SAM to flowering have not been elucidated yet. The plants of day-neutral tobacco (Nicotiana tabacum L.) cv. Samsun were transformed with fission yeast mitotic activator coded...
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Detection and analysis of crystal defects in Si wafer for electronics
Páleníček, Michal ; Tichopádek, Petr (referee) ; Urbánek, Michal (advisor)
The thesis deals with the study and analysis of crystallographic defects on the surface of silicon wafers produced by Czochralski method. It focuses primarily on growth defects and oxygen precipitates, which play an important role in the development of appropriate nucleation centers for growth of stacking faults. The growth of stacking faults near the surface of silicon wafers is supported by their oxidation and selective etching. Such a highlighted stacking faults are known as the OISF (Oxidation Induced Stacking Fault). Spatial distribution of OISF on the wafer gives feedback to the process of pulling silicon single crystal and wafers surface quality. Moreover the work describes the device for automatic detection and analysis of OISF, which was developed for ON Semiconductor company in Rožnov Radhoštěm.
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Business process improvement
Vasyliev, Viktor ; Tichá, Ivana (advisor) ; Ladislav , Ladislav (referee)
This paper focuses on a timely topic, specifically management of processes and improvement of business processes. Czech economy has now fully accommodated to business in market conditions and Czech businesses are increasingly more integrated into the global economy. These conditions require increasing competitiveness of Czech companies and increasing the efficiency of administrative activity.
In order for modern companies to succeed in the marketplace they must constantly focus on the improvement of their activities, and therefore it is important to keep developing new technologies, business methods, and improve the quality of the final products of the introduction of new effective methods of management and organization of businesses.
Business processes are an integral part of every company and their improvement is an essential tool to increase competitiveness and proximity to the customer. The study of business processes allows to gain the necessary expertise in complex analysis and a detailed assessment of existing processes, finding optimal solutions that the managers and employees cannot see in their positions. Optimizing business processes supports us in having a clear idea of all the activities, objectives and final outcome of their activities.
Only in case where the company will have a good analysis of the underlying business processes focused on a specific goal can the enterprise achieve improvements in all the necessary activities. Process analysis is a good method to answer the question what is necessary and sufficient to achieve the desired objectives.
This thesis is focused on business processes and their improvement. The theoretical part elaborates on the process management and compares different approaches to making changes. The practical part focuses on the application of theoretical knowledge in a chosen company. Firstly it describes the analysis of the current situation and subsequently submits proposals for specific improvements.
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Dispensing of viscous eye drops
Zimmelová, Jana ; Šklubalová, Zdeňka (advisor) ; Mužíková, Jitka (referee)
Dávkování viskózních očních kapek Jana Zimmelová Summary The objective of this thesis was to study the factors affecting the viscous eye drops dosage. The influence of the effective dropper tip perimeter, surface tension and viscosity of the liquid, and the dispensing angle upon the weight of drop was studied at four commercial ophthalmic preparations containing various viscolyzers, sodium carboxymethylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, and xyloglucan, and benzalkonium chloride as an antimicrobial preservative. The weight of a drop was directly proportional to the diameter of the outer perimeter of the dropper tip and the liquid surface tension. No significant influence of viscosity upon the weight of drops was discovered. The weight of drops decreased when the dispensing angle was reduced from 90ř to 45ř except of the situation when the drop slided down the external lateral surface of the dropper tip and consenquently increased its weight. That was observed for the eye dropper Ursapharm. Minimum failures of drop dispensing with low variability of the weight of drops at both investigated dispensing angles have been found for eye dropper Johnson & Johnson (eye drops Visine - tired eyes). Thus, this eye dropper could be recommended for dispensing of viscous eye drops.
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