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Analysis of the impact of low interest rates on banking business in Sweden
Hellová, Tereza ; Dvořák, Petr (advisor) ; Fleischmann, Luboš (referee)
The goal of thesis titled "Analysis of the impact of low interest rates on banking business in Sweden" is to define conditions of bank business and profitability of banks in Sweden. Bank management is monitored mainly in terms of low interest rate policy. Among the indicators observed in the period from 2011 to 2015 include particularly the net interest margin, profitability ratios and loans volume. Risk incurred by banks is also monitored through losses from credit operations and the share of risk-weighted assets to total banking assets.
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The collection of published articles
DVOŘÁK, Petr
The aim of the collection of published articles is to define the requisite social skills of the English language teacher as a part of his/her professional competence, in the context of communicative language teaching in classroom interactions between English teachers and adolescent pupils. The theoretical preliminaries of the research whose findings are presented in the articles are the functional communicative approach to language and communicative language teaching. The attention is paid to the processes of interaction, communication and classroom discourse at school with an emphasis on foreign language teaching. We try to specify social skills of the English teacher and define social-skill aspects of foreign language educational interactions. The findings of the research presented in the articles concern mainly the educational style of English teachers and English teacher's behaviour in particular classroom interactions. The research is also focused on selected social-skill aspects of classroom discourse within communicative language teaching, specifically, pupils' and teachers' initiations of communication, questions, and the distribution of communication opportunities.
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Hereditary and non-hereditary factors affecting starch content in potato tubers
Malá, Lucie ; Sedláková, Vladimíra (advisor) ; Dvořák, Petr (referee)
This literature review relates to the starch which is presented in potato tubers, and hereditary and non-hereditary factors that influence content of the starch. At the beginning of the work, the attention is paid to the potatoes itself, especially their general characteristics. It should also mention the content of substances in tubers and their impact on human health. Further, the work is focused on the main thema, especialy starch present in potato tubers. Starch has considerable importance for the entire national economy, currently used not only in the starch industry, but it is more frequently used in other industries, for example paper or textile industry. Starch is composed from two important polysaccharides, amylose and amylopectin which are described in details. There are factors, that may influence starch content in potato tubers, like genetic and environmental factors. The simplest genetic factor that can influence the content of starch in potato tubers is crossing. The biosynthesis of starch is very important, which depends on several enzymes that initiate the metabolic pathway. It is pyrophosphorylase, starch synthase (SS), enzymes branched starch (SBEs) and enzymes unbranched starch (DBES). Starch synthase plays an important role here, in particular her isoform GBSS (granule bound starch synthase), which synthesizes amylose. Amylopectin is synthesized by a complex of enzymes SSI, SSII, SSIII, SSIV. The manipulation of single sugar genes metabolism can affect the formation and composition of starch in any variety of potatoes. This manipulation is called transgenesis and her goal is the creation of new potato genotypes. We can produce potato starch with high amylose by inhibiting enzymes SBE A and SBE B. A starch with a high amount of amylose is highy asked from the industry, because starch has unique functional properties. It should be mentioned DNA markers that has connection with the cultivation of potatoes and offers new opportunities for selecting potatoes genotypes. With DNA markers is linked MAS analysis and the associated method PCR polymerase chain reaction method. Another important method is QTL method. The environmental factors which influence the starch content of potatoes, which are mentioned in this work, are drought, light, cold. It should also be noted that even postharvest stress has a negative effect on starch content in potato tubers. Environmental stress affects and changes the yield of the starch.
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Acrylamide in potato products
Jiruška, Jan ; Sedláková, Vladimíra (advisor) ; Dvořák, Petr (referee)
This thesis provides a review describing acrylamide (AA), its detection and reduction. Botanical description and list of registered varieties of Solanum tuberosum in the Czech Republic is provided. Attention is payed to chemical composition of tubers. Next step is about AA. AA can cause carcinogenic and neurotoxic effects, particularly because it can be converted to a more reactive compound glycidamide in a human body. Thanks to animal experiments, we can reveal negative effects on the human body.
AA is formed by heat treatment over 120 °C in potatoes. Therefore, it is in potato chips and crisps. It is reaction of the free amino acids (especially asparagine) and reducing sugars (mostly glucose or fructose). It is all about several consecutive reactions that are included in the Maillard reaction. This reaction causes typical taste and aroma in products. Unfortunately, AA is one of the byproducts.
Today, formation of acrylamide has growing attention, because scientists want to reduce it as much as possible. Growing, industrial processing of potatoes and addition of additives during heat treatment is included. Antioxidants can significantly prevent formation of AA in food. There are also gathered informations on advanced analytical methods to detect AA in food. Rapid methods of detection are becoming more popular by scientits, that is why they are also included.
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Production and processing of seed potatoes in organic farming
Janochová, Veronika ; Dvořák, Petr (advisor) ; Koukolíček, Jan (referee)
Farmers working by the organic farming system are, according to valid legislation, required to use preferably certified ecological planting material. According to the zero offer of those products present this Bachelor work evaluate the possibility of seed potatoes (Solanum tuberosum L.) in organic farming system. The most common reason of not accepting planting material is the medical condition, that is affected during the entire production process. Most prominent problem is incidence of viral diseases in the mother crops, that are mostly transmitted by aphids (Aphidoidea). Recommendation for successful planting of seed tubers is a complex of preventive measures along with the whole process from its zoning, land cultivation, potato seed preparation through the vegetation and plant care to the harvest process and subsequent treatment of tubers. Part of the work is devoted to the regulation of harmful agents using bioinsecticides, plant extracts or growing potatoes with the use of intercroping. The practical part evaluates the posibility of growing buffer strips with the use of buckwheat, oats and mixture of plants (mustard, phacelia, buckwheat and sunflower) as a possibility to reduce flight activity of aphids in potato fields. Obtained results may indicate an influence of border crop to incidence of aphids and its specific effect could be caused by kind of buffer strip plant or its mixtures
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The use of fungi and their products in organic farming
Krupičková, Karolína ; Dvořák, Petr (advisor) ; Král, Martin (referee)
Current excessive use of chemicals in plant protection raises problems. Two of these problems are increased resistance of pest populations and penetration of residues of these substances in the food chain. In recent years, there is an effort to reduce the use of chemicals and replace them with biological products that are friendly to the environment.
This thesis deals with the possibility of using of fungi and preparations containing them to protect plants, instead of using chemicals. This bachelor thesis summarizes literature and studies dealing with this problem. Firstly, it deals with mycoparasitic and entomophatogenic fungi. It mentions their representatives, which are important for biological plant protection. For mycoparzitic fungi are representatives Trichoderma harzianum, Clonostachysrosea and Pythium oligandrum. There are mentioned their life cycles and bio-preparations made from them, which are used for plants protection. From entomopathogenic fungi thesis deals mainly about genera Beauveria, Hirsutella, Lecanicillium, Metarhizium, Nomuraea, Paecilomyces, Tolypocladium and Aschersonia. Beauveria, Hirsutella, Lecanicillium, Metarhizium, Nomuraea, Paecilomyces, Tolypocladium and Aschersonia. For all representatives are listed bio-preparations and their use for protecting crops against pathogens. In the bachelor thesis are mentioned products based on fungi for protecting potatoes. Most of these products are not registered in the Czech Republic, except Polyversum which contains spores of Pythium oligandrum and is used to protect the potatoes against potato late blight (Phytophthora infestans).
The majority of biological products is highly effective against crops diseases, but some biological products are effective only in laboratory conditions at optimum conditions for the given species (eg. Tolypocladium cylindrosporum).
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Screw pumps
Dvořák, Petr ; Jandourek, Pavel (referee) ; Klas, Roman (advisor)
This work gives basic information about screw pumps. The work is about hydrostatic convertors. It describes division hydrostatic convertors basic information, purpose, equations and diagrams. Then the work gives information about division of screw pumps, their construction, principle, how working and utilization. At the end of the work is derivation of equations for computation twinscrew pump with buttress thread and drawing of diagrams from these equations. Consequently is doing calculation of twin screw pump for entry data.
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Design Computer Network in a Family House
Vala, Lukáš ; Dvořák, Petr (referee) ; Ondrák, Viktor (advisor)
This thesis deals with the entire network in a new house. The first part deals with the analysis of the current state of the house, the possibilities and requirements of the investor. The second part focuses on theoretical foundations. The third part deals with the design solutions and requirements for implementation.
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