|
| |
|
| |
|
|
The occurence and adverse health effects of acrylamide in food
Grassová, Sandra ; Bušová, Milena (advisor) ; Holcátová, Ivana (referee)
AJ Acrylamide belongs to the group of process contaminants originating in foods with a high carbohydrate content during the heat process, as baking, frying, grilling, etc. For people is industrially producing acrylamide neurotoxic and according to IARC is classified probably as human carcinogen. Acrylamide which is occured in foods, probably makes up 1/3 of daily energy supply. The Bachelor thesis tries to give a comprehensive overview in the theoretical part information about Acrylamide - a description of its physical and chemical character, possibility of its industrial use, possibility of its exposure and dietary intake, information on its toxicity, occurrence and incidence in foods, the way of its elimination and finally its posibility of analytical determination. In the laboratory, the amount of acrylamide was determinated by the LC/MS method in selected foods. Of the 42 samples, acrylamide was not detected in 2 samples of extruded breakfast cereals. The lowest content of acrylamide was determined in extruded breakfast cereals (45 μg.kg-1 ), roasted muesli and cornflakes. The amount of acrylamide in these commodities ranged from 45-279 μg.kg-1 . Average values Acrylamide were contained in biscuits. The highest values were measured for potato chips and corn popcorn, from 83 to 1550 μg.kg-1 and...
|
|
|
Securing operability system of resources in kind of chemical and technical service in the fire brigade of Pardubice region
KOŽENÝ, Petr
The aim of the diploma thesis is to assess contamination by chemical substances of selected operating premises at the FRS stations of the Pardubice Region. Elevated contamination by dangerous dangerous chemical substances of the mentioned premises can be results of many factors, from technical to organisational ones, and as a final consequence of this, it may influence firefighters´ health negatively. The theoretical part of the thesis presents basic information about the organisation, duties and securing the operability of chemical and technical services material equipment. Furthermore, knowledge of possible risks of contamination of material equipment and about inspections of the chemicals in operating environment are presented. In the survey part, air contamination of 13 selected areas is assessed during everyday operations and once in an intentionally contaminated area. As the measuring procedure in all the selected areas, air sampling through adsorption tube with Tenax sorbent was used. Specifying the chemical substances in the samples is implemented by the means of a thermodesorption equipment and a gas chromatograph with a mass spectrometer. Furthermore, sampling in sample bags with following analysis by the means of infrared spectroscopy is implemented in contaminated areas. There are 42 air sampling in Tenax adsorption tubes and 2 air sampling in sample bags implemented altogether. Numbers of volatile organic substances is identified in the surveyed areas, most of them benzene and toluene. From identified inorganic gases hydrogen sulfide is discovered in one case, which concentration exceeded strongly the hygienic standards set by the Czech legislation. The identified results not only can influence securing the operability of material equipment but also contribute to a general reduction of firefighters´ exposure to dangerous chemical substances.
|
|
|
Vliv solární radiance na morfologickou a anatomickou stavbu jehlic smrku ztepilého
Ambrož, Petr
There were chosen twelve localities with even-aged Norway spruce trees from different altitudes and northern and southern exposure at the Jeseníky Mountains. One-year old sun-exposed shoots were sampled from every locality. Needles were taken from shoots and then used for making the cross-sections. Additional needles were taken for needle area, needle length and dry matter analysis. Anatomical analysis was done on the microscopic pictures. The predictive maps for some morphological and anatomical parameters were created by the use of elevations and solar radiation data in ArcGIS. It was found that with increasing altitude the morphological and anatomical parameters of needles were not in linear progress. The best correlations with solar radiation was found for needle length. In this case, the change of needle length was explained by 82 % by the change of solar radiation. Although the growth of needles and thus the tree is determined by complex influence of external and internal factors, these results indicate significant effect of solar radiation on the Norway spruce growth at the Jeseníky Mountains.
|
|
|
Museum Marketing and Cultural Heritage Marketing: Jewish Museum in Prague in the 21st century
Mašková, Martina ; Halada, Jan (advisor) ; Čeňková, Jana (referee)
Bachelor thesis "Museum Marketing and Cultural Heritage Marketing: the Jewish Museum in Prague in the 21st century" deals with marketing activities and art marketing activities of the Jewish museum in Prague in the 21st century. The aim of the thesis is firstly evaluating the current art marketing communication of the museum using reference books and secondly giving a recommendation. The thesis guides through the history of the Jewish museum in Prague from the beginning in 1906 to the First and Second World War and communism to privatization. In the next chapter, marketing and commercial activities are introduced among 2001 and 2016. The third chapter's main topic is the art marketing concept along with its main principles and functions. The theory is contrasted with the practice. Afterwards, the recommendations are offered. The research showed that only Robert Guttmann's Galery (opened in 2001) and the Maisel synagogue (reconstructed 2014-2015) offer everything a good museum of the 21st century should offer. That means information boards, IT devices, enough seat places, suitable lighting and the right high of display cases. Due to the Conception of new expositions, all the buildings should be reconstructed in the future. Anyway, the main findings expose that the employees are often fired for trivial and no...
|
|
|
Gallery aviation technology and traditions of aviation at the airport Medlánky in Brno
Bělehradová, Věra ; Žalmanová, Petra (referee) ; Šindlar, Jiljí (advisor)
Sport Airport complex Brno-Medlánky is nestled in the undulating hilly terrain in fields just beyond populated areas in Brno-Medlánky. The history of the airport dates back to 1924 when it was built the first wooden hangar for training purposes glider flights. Current state urban of airport is orderless. The aim is to streamline the complex and give it the order, allowing easy and efficient orientation in the space. The main intervention was the creation of a new central building - Aviation Museum. The concept of the design is based on the division of the whole area into two branches - communication axes, based on the mass preserved historic wooden hangars. Between the two communication arms is inserted a central axis on which is located the heart of the complex - Aviation Museum. It is a building organic form, inspiring axially symmetric wingspan (bird, airplane, beetle). It is this symmetry axis of the building creates a view towards building on the runway. Mass of the building used by the sloping terrain and is partially sunk under the ground. Building volume follows an upward slope from the outside and blends with the surrounding terrain. The internal layout consists of three floors, one of them is completely sunk below ground level and second half. The main entrance to the gallery is located in the uppermost floors, the direction of the exhibition is therefore directed downwards into the basement. The exposition is divided into six parts: RC models exposure, gliders exposure, powered aircraft exposure, screening room, children's exposure and air trainers. Other areas consist of building technical facilities. In the basement there is a workshop with aircraft lift, with the possibility of placement unexposed aircrafts. The supporting system of the building consists of two parts: reinforced concrete tubs and arched steel structure with a span of 50m.
|
|
|
Karlštejn Castle in 20th Century
Benešová, Petra ; Županič, Jan (advisor) ; Dvořáková, Markéta (referee)
Karlštejn Castle is one of the most popular tourist sights in the Czech Republic. This thesis therefore focuses on the use of this conservation area, especially in the second half of the 20th century and all the 21st century. Based on the available archival documents, in the thesis there are described changes of the expositions in the castle's rooms that are opened to the visitors. The thesis is also focused on the tour routes and development of the visitors' turnout. Last of all, in this thesis there are mentioned past and present events held in the castle and other "crowd-pullers" that are attractive to the visitors. In the first part the thesis also deals with the issue of the castle's ownership and the effort for the integration among the UNESCO sights.
|
|
|
Monte Carlo simulation of Counterparty Credit Risk
Havelka, Robert ; Šopov, Boril (advisor) ; Skuhrovec, Jiří (referee)
The counterparty credit risk is particularly hard to simulate and this thesis is only the second work so far, which considers effective simulation of couterparty risk. There are two new approaches to stochastic modelling, which are useful with respect to ef- ficient simulation of counterparty risk. These are Path-Dependent Simulation (PDS) and Direct-Jump to Simulation date (DJS). It had been show that DJS is far more ef- fective, when it comes counterparty risk simulation of path-independent derivatives. We focus on a portfolio of interest rate swaps, which are effectively path-dependent. DJS approach yields estimates with much lower variance than PDS approach. But as expected, the DJS is also much more computationally intensive. The increase in computing time in majority of cases wipes out any gains in lower variance and PDS approach is shown to be more effective, when computing time is taken into account. We also show that in practice the convergence rate of Monte Carlo method signif- icantly underestimates the true reduction in variance, which can be achieved with increasing number of scenarios. JEL Classification C02, C15, C63, G01, G12, G32 Keywords Monte Carlo, CVA, Exposure, Variance Author's e-mail robberth.cz@gmail.com Supervisor's e-mail boril.sopov@gmail.com
|
|
|
CHEMISTRY ORIENTED FIELD TRIP IN SECONDARY EDUCATION
Papírníková, Lucie ; Teplý, Pavel (advisor) ; Klímová, Helena (referee)
This thesis summarized available information about field trips and their integration into undergraduate chemistry curriculum. It also contains a list of places in Prague suitable for filed trip in chemistry education. Suggested field trips include a description of each visited place, photographs, and contact informations.. The apendix contains samples and links of worksheets, video recordings and other teaching laids. The thesis can be used as a teacher aid for preparing school field trips.
|
guest ::
