National Repository of Grey Literature 481 records found  beginprevious472 - 481  jump to record: Search took 0.00 seconds. 
Spectroelectrochemistry of Flavonolignans and their DNA-binding Copper Complexes
Sokolová, Romana ; Kubala, M. ; Vavříková, E. ; Ulrichová, J. ; Křen, Vladimír ; Vacek, J.
The oxidation of flavonolagnan silybin and its selected derivatives was studied on glassy carbon electrode in aqueous environment by means of cyclic voltammetry, in situ UV/VIS spectroelectrochemistry and absorption spectrometry. The oxidation mechanism of flavonolignans and their complexion with copper was investigated under anaerobic conditions. The acquired results were interpreted in context of protective (antioxidant) and DNA-binding (prooxidant) properties of flavonolignans and their transition metal complexes.
Construction Business Opportunities in Selected Central and Eastern European Countries
Vacek, Jiří ; Černohlávková, Eva (advisor) ; Přikrylová, Jana (referee) ; Horňák, Pavol (referee)
The Ph.D. thesis deals with the construction research methodology and performed research, and the analysis of business opportunities in the construction industry of the selected Central and Eastern European countries. The thesis is divided into two parts. The first part focuses on the description and specification of the main categories -- general market research methodology, the description and statistical methodology used by the Czech Statistical Office, and their comparison with our research methods (advantages, disadvantages, and benefits). This part also mentions specific features of construction industry which need to be taken into account when performing the research and evaluating the results for the purposes of the development of business opportunities in the construction industry. The second part of the thesis analyses the particular results of the construction industry research carried out in the Czech Republic, Slovakia, Poland, and Hungary in 2006--2012 (with more than 2,500 research interviews). It brings a comparison of the Eurostat/statistical offices published data vs. the analysed developments in particular years predicted by the construction company top management (both the biggest and middle/small construction companies) throughout the analysed regions, and the impact of their predictions on the company behaviour in the selected spheres of the entrepreneur environment. The analyses bring the comparison of the methods by means of which the companies acquire new business orders, the extent of transparency and/or corruption in particular countries, changes during the economic crisis, the extent of company risk and key priorities on particular markets, as well as the comparison of the key limitations that have the main impact on the economic results of the construction company. Using the originally developed methodology and the model of research implementation, the thesis provides the analyses of considerably reliable information about the operation and behaviour of the construction companies on the market in the neighbouring countries, as well as the necessary insight which can facilitate the expansion of the Czech companies into the selected countries. At the same time, the construction research model has been verified in practice by regular construction research studies which assist construction companies in their decision making and orientation on the changeable construction markets both in the Czech Republic and in other selected countries. The outcomes and results of particular research studies have been presented and discussed during the regular 'Encounters of Czech, Slovak, and Polish Construction Leaders' by the construction company top management as well as by the representatives of the government of particular countries. The thesis outcomes prove that the originally developed methodology applied in the follow-up research can facilitate and provide relevant and high-quality predictions about the developments in construction industry, which can be successfully used by the top management in their decisions on the future prospects of their company business opportunities in Central and Eastern European countries. Currently, more than 4,700 users in the Czech Republic make use of the particular research studies on the developments in construction in the Czech Republic and in other selected countries. As results from the carried out research, it is possible for the Czech construction companies to make use of business opportunities and to expand to neighbouring countries, especially to Slovakia and Poland, and, with regard to geographical closeness of the researched markets and considerable similarity of construction works/applied technologies, thus compensate for a plunge in domestic orders by the export of construction works. Specialized construction companies with higher business value-added will have the biggest potential.
The mechanism of isotopic exchange reaction of hydrogen H-5 of uracil derivatives in water and in non-protic solvents
Dračínský, Martin ; Jansa, Petr ; Chocholoušová, Jana ; Vacek, Jaroslav ; Kovačková, Soňa ; Holý, Antonín
The mechanism of isotopic exchange reaction of hydrogen H-5 of uracil and its methyl-derivatives in water and in organic solvents was studied. The key intermediate of the reaction is a C-5 tautomer of uracil. We have used 1H NMR spectroscopy to follow the kinetics of the hydrogen-to-deuterium exchange reaction. In aqueous media, a general base catalysis was observed and in organic solvents we propose a reaction mechanism with participation of the solvent molecules. These findings could be effectively used for the tritium labeling of pyrimidine nucleic acid bases.
Renewable Source of Energy – Gasification of Biomass with Co-generation of Heat and Electricity
Šulc, J. ; Richter, M. ; Svoboda, Karel ; Vacek, J.
Co-generation processes based on combined production of heat and electricity from biomass will be preferred. Biomass gasification (mainly woody biomass), even in a smaller scale, offers relatively high efficiency of power generation, higher than commonly attained in combustion processes. Gasification of biomass produces raw fuel gas, which can be used, after appropriate cleaning, as a fuel in internal combustion engine or (after compression) gas turbine. The gasifier is based on co-current flow of gas and solid phase, up-flowing biomass (wood pellets) driven by a vertical screw and gasification by air. The gas cleaning is based on separation of dust, oil and water scrubbing for Removal of tar, soot, organics and ammonia. Electricity will be produced from the clean fuel gas by means of a gas engine and power(electricity) generator.
Agenda and campaigns focused on Occupational Safety and Health
Vacek, Josef ; Dvořáková, Zuzana (advisor) ; Kleibl, Jiří (referee)
The thesis clarify the reasons of program construction and introduction of campaigns focused on Occupational Safety and Health (OSH). On the basis of work accident rate statistics, conducted researches and investigation we have found out, considering OSH issues, that it is essential to change attitudes, approaches and thinking of the public, company management and employees. The status quo shows that people do not approve OSH issues. They take them as a burden. At this point it is impossible to reduce the number of work accidents and cases of occupational desease. Furthermore, it is impossible to achieve natural development of high-quality work culture and ease. The thesis also deal with prospective devices which could solve the current situation. These devices are mainly edification and OSH promotion. Again via researches and investigation it is being found out which specific tools of edification and promotion are the most effective ones in terms of content aspect. One part of the theory of these thesis is historical view on the process of work safety from the first extant evidence till the post-war situation in Czechoslovakia. Edification and campaigns where programs and campaigns are part of that, start from general marketing principles and directly, creation and introduction of campaigns is the matter of social marketing. That is why a part of the theory is focused on marketing principles which can be used when edifying and promoting OSH and also focused directly on social marketing and social advertising. One of the chapters specifies the process of implementation of campaigns focused on OSH. Concretely, it defines target groups, available tools and devices, planning, designation of campaign partners, principles of implementation and in conclusion it analyses how to assess the campaign and methods of getting feedback after the campaign. To demonstrate that, in the thesis there are described current campaigns focused on OSH issues in the Czech Republic and also cooperating with the European Union. The countries of the European Union have OSH at very high level and because our country is a part of this community, it is almost a duty to make the best of experience of these countries and to cooperate with them. The conclusion of the theoretical part deals with the attitude of the mentioned countries toward the issue.
Segmentace na trhu jogurtů
Vacek, Jan ; Koudelka, Jan (advisor) ; Mottlová, Libuše (referee)
Cílem této práce je na základě vybraných metod a s použitím primárních i sekundárních údajů odhalit podstatné diference mezi spotřebiteli na trhu jogurtů. Tyto diference pak použít k odkrytí segmentů, rozvoji jejich profilu a určení atraktivity těchto segmentů. Nakonec je přidáno určité doporučení pro další marketingové aktivity na daném trhu.

National Repository of Grey Literature : 481 records found   beginprevious472 - 481  jump to record:
See also: similar author names
11 VACEK, Jakub
24 VACEK, Jan
11 Vacek, Jakub
24 Vacek, Jan
4 Vacek, Jaroslav
1 Vacek, Jindřich
16 Vacek, Jiří
11 Vacek, Josef
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