National Repository of Grey Literature 7 records found  Search took 0.01 seconds. 
Residua of Drugs in the Evironment - Interaction with Higher Plants
Jirák, Jaroslav ; Smrček, Stanislav (advisor) ; Moša, Marek (referee)
- 4 - Abstract The aim of this study was to carry out phytoextraction experiments using corn plants (Zea mays) and determine the phytoextraction efficiency for specific non-steroidal anti- inflammatory drugs and carbamazepine and their combinations. After 10 days of growth, a nutrient solution containing ibuprofene, naproxene, diclofenac and carbamazepine in concentrations ranging from 5 to 10 mg/L was added to hydrophonically cultivated plants. Nutrient solution samples were taken every 24 hours and the samples were then analysed using a HPLC/DAD system. At the end of the experiment, the experimental plants and roots were analysed for extractable residua using HPLC/DAD + FLD. The greatest phytoextraction efficiency was found for ibuprofene. The second and third most effective extraction was observed for naproxene and diclofenac, depending on the evaluation criteria. The lowest phytoextraction efficiency was observed for carbamazepine. With multi-component experiments, lower phytoextraction efficiency was found out for all substances with the exception of ibuprofene in combination with diclofenac and carbamazepine. The toxic impact of ibuprofene on plant transport mechanisms was also proven. The extractable residua analysis confirmed the ibuprofene's toxicity on plant transport mechanisms and also the...
World Trade Organization
Jirák, Jaroslav ; Borkovec, Aleš (advisor) ; Hraba, Zdeněk (referee)
The aim of the work was to describe transparently the development of GATT and first of all WTO. The comlexity and topicality was stressed as well as the influence on Czechoslovakia or the Czech republic now. The work is organized chronologically exept for the last part which is dedicated directly to the position of the domestic economy in the purview of international business. There was the highest effort to bring balanced information and to picture consenqunces they cause for international business GATT and WTO.
Analysis of Green ICT concept for small and medium business
Jirák, Jaroslav ; Basl, Josef (advisor) ; Gála, Libor (referee)
This thesis deals with the issue of sustainable development and its relation to information and communicaton technologies in the business background. The whole concept is called Green ICT. The main aim of the thesis is to provide an insight into the legislative and contentual aspects of Green ICT and its relation to business informatics, suggesting several practices for use in small business. The first part defines all important legislative aspects and summarizes the view of Green ICT according to several authors and describes and compares the certificates of physical ICT. Next part is aimed to business environment and deals with the most frequently occuring barriers and motivation factors. The small and medium business is specified and the requirements of managing and monitoring the impact on the envirnoment is analyzed. Next part of the thesis analyzes defined areas of potential implementation of Green ICT and creates relevant practices to improve the power consumption and the impact on the environment, on the basis of available case studies and research findings For every practice, its potential technical solution, effects and risks are considered. These practices are then analyzed and appraised in terms of MMDIS methodics. The added value of the thesis is comprehensive description and analysis of individual practices of Green ICT from different points of view and analysis and comparison of available certifications of ICT devices.
Methodical support to creation of educational media
Jirák, Jaroslav ; Šedivá, Zuzana (advisor) ; Gergelitsová, Šárka (referee)
This thesis deals with possibilites and usage of "new media" in the educational process. The aim of this thesis is to describe the possibilities and refer to basic recommendations for the effective creation and usage. The thesis contains a description of digital educational presentations, application of audio, video and didactical computer applications and games. Every part presents an example of suitable software and its application. The thesis describes also present trends of used technologies and future expectations. At the end of the thesis, there is an analysis of present situation and suggested solution for the small primary school.

See also: similar author names
1 Jirák, J.
2 Jirák, Jakub
4 Jirák, Jan
4 Jirák, Josef
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