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The use of (nano)oxides for metal and metalloid stabilization in contaminated soils
Michálková, Zuzana ; Komárek, Michael (advisor) ; Luke, Luke (referee)
The main objective of the thesis was to evaluate the potential of selected Mn and Fe (nano)oxides for the stabilization of metals and metalloids in contaminated soils. The research was focused basically on three materials - commercial nanomaghemite (Fe III), nanomagnetite (Fe II,III) and a synthetic amorphous Mn oxide (AMO). The main aim of the work was to provide a complex view on the chosen stabilizing amendments regarding not just their direct influence on contaminants mobility and stabilization mechanisms, but also their stability and alterations in soil conditions together with influence on soil microorganisms and higher plants. Firstly, adsorption properties of the tested materials towards Cd, Cu, Pb and As were investigated. In this context, the most effective material showed to be the AMO reaching one to two orders of magnitude higher adsorption capacities than Fe III and Fe II,III under given experimental conditions. Interestingly, the rate of As(V) adsorption onto AMO was increasing with increasing pH as a result of high pHzpc of the AMO (8.1) and significant dissolution of this phase at lower pH values. As a next step, the influence of (nano)oxides on metal(loid)s mobility and other physico-chemical soil characteristics after application to contaminated soil was examined. Again, the AMO proved to be the most efficient in reducing mobile pools of Cd, Cu, Pb, Zn and As. On the other hand, Fe III and Fe II,III addition had generally less significant effects on contaminants mobility. AMO application further resulted in an increase of soil pH connected with AMO dissolution and unwanted decomposition of soil organic matter. When (nano)oxides alterations in soil conditions were observed, MnCO3 coatings were identified on AMO surface while no significant changes were recorded for Fe III and Fe II,III. As the MnCO3 formation was connected with increased AMO stability, AMO particles synthetically covered with MnCO3 coating (denoted as SM AMO) were prepared. Although the SM-AMO had a lower mass loss in soil than pure AMO, the stabilizing efficiency was almost the same for both materials. The differences in surface composition of both materials were decreasing with time as MnCO3 naturally precipitated on the AMO surface in soils while the SM AMO coating was gradually dissolving. When investigating the effect on soil microbiota, AMO efficiently promoted soil microbial activity while no significant changes were observed in the case of Fe III and Fe II,III. The AMO was also able to reduce the uptake of Cd, Pb and Zn by sunflower (Helianthus annuus L.), eliminate Zn phytotoxicity symptoms and increase biomass yield. On the other hand, toxic levels of Mn released from the AMO in an acidic soil were found in sunflower tissues. AMO application is thus recommended for contaminated neutral or slightly alkaline pH with a higher cation exchange capacity in order to avoid unwanted release of Mn. Finally, various types of AMO-biochar composite sorbents were recently prepared and field experiment focused on stabilization of Cd, Pb, Zn and As using studied materials is currently under preparation. The combined results from the thesis highlight the importance of a complex experimental approach dealing with all parts of the contaminated soil environment in order to obtain complete information about the efficiency and usefulness of any newly developed stabilizing amendment.
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Effect of dairy cows housing technology on mastitis occurrence
Brzáková, Lenka ; Stádník, Luděk (advisor) ; Jan, Jan (referee)
The objective of my bachelor thesis was evaluation of quality of housing, milking and making analysis of mastitis on chosen farm.
First part of the thesis contains of literature summary about housing technologies, mastitis issues, their detection, originators, therapy and factors affects against their incidence. Thereafter is this part focused on tipes of milking parlours, corect milking procedures and mechanized milking.
Materials and methodes of the thesis contains the characteristics of chosen farm where the quality and technology of housing, milking and nutrition of milk cows and other factors affecting presence of mastitis such as taking care of cloven hooves was watched in 2014. The incidence, detection and curation of mastitis was watched afterwards. Montamilk s.r.o. farm cradles 1,200 pieces of cattle and milk cows are about 419 out of it.
In the part of thesis named results was watched and evaluated inspection of efficiency in inspecting year 2013 - 2014, which was stated on first lactated cows and on cows which are on second and further lactation. Milk yield was far better with cows on second or futher lactation according to data gathered during the study and expressed by diagram. Diagram of milk components (fat and proteins), which was divided by lactation, was expressed in this part too. Other examinated parameters was occurrence of mastitis - which milk cows, in which season is the occurrence more often, treatment and cost of treatment for one cow. At the end the number of somatic cells for 2014 was represented in diagram for particular lactations.
In part of thesis called discusion the comparison was drowed between results from chosen farm and national average of efficiency checks. From results is obvious that milk cow in Mnotamilk has been better in first lactated cows by 427 kg and in second and more lactated cows by 602 kg than is the avarage in Czech republic.
Far more the milk components in Montamilk was compared with rest of Czech republic and the results was quite similar. The volume of fat of Montamilk cows was lower in every lactation in comparison with milk cows from Czech. Value of fat in Czech republic avarage first lactated cows is 3,87 % in Montamilk 3,85 % and the value of fat on second and more lactation cows is 3,86 % in Czech average and 3,81 % in Montamilk.
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The Economic Consequences of Organized Crime
Kunt, Lukáš ; Polišenský, Miroslav (advisor) ; Pavel, Pavel (referee)
Summary
This thesis deals with the significance of the threat that organized crime poses to society. The aim is to provide an overview of its present forms and economic impact. In the theoretical part, there is an outline of basic terms associated with organized crime, its traditional and new forms, the most influential organized crime groups and their history regarding the Czech Republic and the EU and institutions that fight them. The empirical part focuses on the issue of illegal drugs. Drugs smuggling and illegal drug trade are defined from the perspective of criminology. Using addictology and police statistics, the features of illegal drug market are described. Comparing various facts, the crackdown on illegal drugs in the Czech Republic and the EU is analysed, and from statistical data - applying mathematical methods - the value of illegal drug market is estimated. Economic impact of chosen forms of organized crime is described by the assessment of their share in GDP and economy in general. In the conclusion of this thesis, some measures that could reduce the social and economic
impact are drawn.
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Clinical biochemical indicators used in diagnostics of equine diseases
Puldová, Doubravka ; Ptáčková, Zuzana (advisor) ; Krejčířová, Romana (referee)
The thesis aims to compile overview of main biochemical indicators that are important in for diagnostics of equine diseases.
Clinical biochemistry is a medical discipline that uses biochemistry and pathobiochemistry for the determination of diagnosis based on activity changes of analytes observed. Laboratory evaluation of analytes has three phases: pre-analytical (preparation of patient to sampling, sampling and sample storage and transport), analytic (analysis) and post-analytical (evaluation of results, veterinarian also contributes in this part). Pre-analytial phase is the most time consuming and also the most error prone. The errors mostly occur during preparation of the patient, during sampling or sample transportation. The most analyzed materials for biochemical analysis are blood, urine and liquor.
Biochemical indicators are compound that are often influenced by the disease, therefore it is possible to use them for the diagnosis. Nitrogen metabolism indicators include proteins, urea, creatinine and ammonia. Enzymes (aminotransferase, gama-glutamyltransferase, glutamatedehydrogenase, lactatedehydrogenase, alkaline phosphatase, creatinkinase and sorbitoldehydrogenase are the main indicators of liver function (they contribute on the metabolism of another compounds) or of the fitness of horse. Glucose and lactate values indicate energetic metabolism, cholesterol and triglycerides indicate lipid metabolism. Water and electrolyte metabolism indicators are sodium, potassium and chlorides. The mineral profile is shown by calcium, magnesium and phosphorus.
The result of determination of analytes is compared with reference values that are not only species-specific but can be also influenced by age or sex. These values represent the range of the compound concentration in body fluid under physiological conditions. It is important to take the clinical symptoms into the account. Not all indicators that are usually indicated in human medicine or different animals are suitable for diagnosis of equine diseases. Majority of indicators diagnose equine-rare diseases (i.e. diabetes mellitus or hepatitis). Determinations of muscle enzymes and lactate are important for the fitness analysis.
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The growth of Lodgepole Pine (Pinus contorta) in reclaimed spoil banks
Štrudl, Robin ; Bažant, Václav (advisor) ; Slávik, Martin (referee)
This diploma thesis deals with the detection of the dynamics of the growth and development of lodgepole pine, which is intended for the purposes of the forestry reclamation on anthropogenic soils spoil banks. In the first stage it is approached the issue of growth and development of woody plants on spoil banks. Are described recent formations, their cutting and editing, further forestry reclamation and associated issues, on which follows the description of the entitlements of tree species in different territories, further criteria necessary for the correct evaluation of the conditions on the habitats directive and appropriate ways of establishing the stands. Subsequently, we approached lodgepole pine, its description, extension, variability, etc. In the second part of the thesis is studied and evaluated growth of lodgepole pine. The first is characterized by the interest of the territory and its natural conditions. On the plots in the forestry arboretum on the spout Antonin samples were taken in the form of stem discs, which served as the basis for determining the necessary values. Values were obtained from tree rings.
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Interaction of humans and the environment in residential hauses with walls from inorganic masonry
Brada, Lukáš ; Kocourková, Jana (advisor) ; Zemanová, Lucie (referee)
Interaction of humans and the environment, is subject to the occurrence of mold in
residential buildings. Mold development has been the ultimate result of a variety of
phenomena, processes and causes that have penetrated in various stages of preparation,
implementation and operation of buildings. The negative effects which the mold in a residential area buildings exhibit is primarily a reduction in the use of comfort living
space in the form of health risks in the form of allergic reactions and possibly causing
chronic problems. Chronic problems over time can lead to serious illness. A big role in
the occurrence of mold also plays a reduction of aesthetic values of residential spaces
requiring repair and remedy these deficiencies. When removing adverse events leads to
an unnecessary additional environmental burden.
Problems of fungi in ground buildings are very expansive and interdisciplinary
problems, which incorporates structural, termomechanic, chemical and biologic aspects.
In this undergraduate work I concentrated on the origin of fungi in ground buildings
with inorganic materials and I am discribing at least some important sources and aspects
of fungi origin in each phases origin and exploitation building, with usage of specialised
literature. Model compultations and examples of origin fungi are performed.
Autocephalous origin of fungi in residencial buildings is yet fallback situation, which
can be possibly prevented. But due to conditions for origin fugi can begin long ago this
fallback situation. Store of bias each phases living buildings is accentuated on possibly
fugi production in buildings from project up to operation.
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Gas exchange characteristics in relation to genotypes in spinach (Spinacia oleracea) under water stress
Helebrantová, Aneta ; Hnilička, František (advisor) ; Pazderů, Kateřina (referee)
The bachelors dissertation was compiled on theme of: Gas exchange characteristics in relation to genotypes in spinach (Spinacia oleracea) under water stress.
Spinach (Spinacia oleracea) is, similarly as the others leaf vegetables, difficult crop in terms of providing the sufficient level of moisture, therefore the attention is drawn to the varieties of spinach which are resistant to the water stress. Thus the target of cultivation is to find plant which will be resistance to influence of the water stress.
In climabox of department of botanics and physiology was founded experiment with three species of spinach: Misano F1, Monores a Matador. The temperature mode was set to 21 °C during the day and 17 °C during the night. The light mode was set to 16 hours of light and 8 hours of dark per day. Maximum light level in climabox was 800 micromole. The plants were cultivated in 4 recurrences, diagram of experiment is involving two variants: control and stress. The plants in control variant were cultivated in substrate, which was irrigated during the whole time of experiment by 250 ml of water. For the plants in stress variant the supply of water was suspended for 10 days and the substrate was naturally continuously dehydrating. After 10 days the water supply was restored (rehydration) for plants in stress variant, same as level of control variant. The observation was made for the speed of gas exchange (photosynthesis and transpiration) in two-day interval. The speed of gas exchange was measured on leaf area with infrared gasometric gas analyzer Lpro+ (ADC Bioscientific, Hodeson, UK). Measured was conducted in morning hours according. Based on the measured values of photosynthesis and transpiration we calculated water usage effectiveness (WUE).
Based on obtained results is evident that the highest average speed of photosynthesis in control variant was observed at variety of Monores (12,10 micromole CO2.m-2.s-1) and lowest at variety Misano (11,58 micromole CO2.m-2.s-1). The highest average speed of photosynthesis in stress variant was measured at variety of Matador (9,43 micromole CO2.m-2.s-1) and lowest at variety Monores (8,76 micromole CO2.m-2.s-1). There was observed decrease of photosynthesis for each of variety during the water stress.
The highest average values of transpiration were observed at variety Monores (1,97 mmol H2O.m-2.s-1), lowest at variety Matador (1,68 mmol H2O.m-2.s-1). Stressed variety Misano reached level of photosynthesis 1,82 mmol H2O.m-2.s-1. Control variety Matador reached speed of transpiration 1,54 mmol H2O.m-2.s-1 and variety Monores 1,85 mmol H2O.m-2.s-1.Variety Misano was on same level of control variant as stress variant.
The most sensitively reacted variety Monores, which usage of water was 4,43 (10-3). Variety Matador managed the stress well, the usage of water was 5,60 (10-3).
Obtained results confirmed hypothesis of genotype differences depending on water deficit, thus there are differences between gas exchange and WUE in control and stress plants.
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Analysis of sheep utility attributes in ecological and conventional flocks in the Czech Republic
Linhartová, Iveta ; Ptáček, Martin (advisor) ; Jan, Jan (referee)
The goal of this diploma thesis was to perform an analysis of sheep breeding of Suffolk breed in basic reproductive performance and meat production traits aspects. The information for rating these aspects was used from two farms. The first of them used conventional way of breeding (ZVOZD Horácko, družstvo) and the second one used ecological way (EkofarmaKosařůvmlýn, s.r.o.).
Fertilization, fertility, intensity and rearing belong among monitored reproductive indicators. These reproductive indicators are expressed in percentages. Regarding meat production traits rating in this thesis we compared influences of year of lambing, farming method, birth month, sex, litter size and age of dam. All these influences were judge according to birth weight (kg), weight at the age of 100 days (kg), average growth (g), depth of the longest dorsal muscle (mm) and according to depth of subcutaneous fat (mm). Reproductive performance and meat production were monitored in years 2011, 2012, 2013, 2014 and 2015.
In terms of reproductive performance with a few exceptions it was true that ZVOZD Horácko, družstvo reached the best values, and in most cases better than the national average. For example in terms of intensity values in 2012 ZVOZD Horácko, družstvo had 35,9% better results compared to national average. In the same year this farm reached 48,1% higher values of percentage rearing compared to national average. Ekofarma Kosařův mlýn, s.r.o. showed worse performances, however it was in most cases better than national average. In terms of intensity in 2011 Ekofarma Kosařův mlýn, s.r.o. had the same results as the ZVOZD Horácko, družstvo. Meat production properties were supported by statistical calculations and all of them were conclusive at least at the level of significance P < 0,05 in all cases except month of birth effect on birth weight. The best results of meat production in terms of effect of lambing had the year 2012, when the birth weight was one of the highest and the other properties (weight at the age of 100 days, average growth, depth of the longest dorsal muscle, depth of subcutaneous fat) were by far the highest in the period of 2011-2015. Next we found out that the ecological way of breeding (in this case Ekofarma Kosařůvmlýn, s.r.o.) has better results than the conventional way (ZVOZD Horácko, družstvo).
The effect of birthmonth has the significant influence on the indicators of meat production and the lambs born in April had the best results. In the case of sex rams are better. Litter size has very important influence on meat production the more lambs per one mother, the lower
birth weights, the lower weights until the period of weaning, the lower weights at the age of 100 days. It is affected by milkiness of the mother. Moreover, the age of mothers also play a significant role. In our research the highest birth weights had lambs of one year old mothers and all other indicators were the highest in the case of three year old dams.
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Analysis of the causes of fires from electrical equipment caused in the South Bohemia region in the years 2009-2013 and the concept of precautions to improve the situation
BENEDIKT, Ondřej
The thesis is divided into two parts, theoretical and empirical. In the first, the author explains the important terms for processing the empirical part. He deals with the theory of fire and summary of the general rules. He also deals with finding out the causes of fire and the computer program "Statistical monitoring of events", all the data were taken here. The chapter provides a general overview of el. devices, classification, history and possible danger. A very important of this part is the division of el. initiators explain. the terms such as el. short circuit, impedance, el. spark, el. arc, overcurrent, car-el. and its application in vehicles. Separately the author deals with atmospheric and ESD. The first objective was to analyze the causes of fires from el. devices in the South Bohemian Region (SBR). The second objective was the proposal of arrangements to improve the situation. The author determined two hypotheses: 1. The most common cause of fires of el. devices in the SBR is the el. short circuit. 2. The most frequent fires of el. devices in the SBR are the fires of vehicles. At the end of the first part, the author outlined the methodology. For processing the empirical part , he chose a quantitative research. The research was carried out by using the one-dimensional statistical analysis of data. The author created the list of literary sources based on literature gained from research libraries, the Fire Rescue Service (FRS) of the SBR, territorial department Strakonice and el. sources available on the internet. All the data the author gained SME of the FRS of the SBR. Within empirical part, the author first carried out the overall statistics of fires from el. initiators. The results show that in the period of 2009 - 2013 there was an increase in number of fires from el. initiators from 7,14 % to 14,97 %, it means more than double compared to a total amount of all fires, which have a decreasing tendency. Then he deals with proportions among particular initiators of fire. These data indicate that the most abundant initiator is car-el. and its application in vehicles. Other significant initiators are el. short circuit and impedance. Other initiators carry a much smaller proportion of the total number of fires. Then follow damages and salvage values caused. Salvage values in each of the monitored years are far greater than the damages, about 80 %. The author continues with the amount of people killed and injured, there is a big difference. Throughout the given period there were 5 people killed in fires from el. initiators, 51 people injured. For the total fires are numbers logically higher, in years 2009 - 2013 were 363 people injured and 51 killed. Then follows a part in which the author deals with individual initiators represented by el. short circuit, impedance, el. spark, el. arc, overcurrent, car-el. and its application in vehicles, atmospheric discharge and ESD. In the empirical part, there are also included initiators, which cannot be further specified. After processing the gained statistical data it comes to the discussion, in which the author analyzes particular tables and graphs, problems, which occurred with their solution and expresses to previously established hypotheses. The first hypothesis was refuted, the second confirmed. The author proposed measures to improve the situation, as there was detected a lack of security measures. The results of the thesis will be a contribution to the FRS of the Czech Republic, especially to the Prevention Department, pedagogical purposes or the general public in the context of preventive educational activities. After implementation of any of my proposals, using the same research it is possible to determine whether the implementation of the proposal has a positive impact on the number of fires, injured and killed people or on an amount of damages in the coming years.
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Project of family farm as closed economic unit
Jakubčík, Václav ; Pazderů, Kateřina (advisor) ; Zdeněk, Zdeněk (referee)
The diploma thesis deals with the family farm, which deals with fast growing trees cultivation. Business plan for my firm is the operation of the cogeneration unit and ensuring its self-sufficiency. The intention is that the family farm should produce more than half the biomass for cogeneration units.
Diploma thesis works with providing services in processing of logging residues, removing seeding trees and transportation. All this in order to obtain sufficient quantities of the commodity for the operation of boiler plants with cogeneration unit. Further outputs are addressed including the use of waste heat. Necessary support in planning the boiler room is the SWOT analysis. Conclusion of SWOT analysis clearly support the business plan for hte operation of a family farm.
Another key factor, that motivates me to expand current boiler room is a continuously rising electricity price. I suppose part of the generated electric power will be used for wood drying, the rest of the energy power is supposed to be sold to CEZ. Revenue from electricity sales should improve my Cash-Flow.
An important source of energy is a waste hot water that will be used for heating lumber drying, rabbit slaughterhouses of Rabbit firm. The rest of hot water waste will be used for heating workshops and residential buildings around.
The main incentive for founding a family farm is request to have enough fuel for the cogeneration unit also in case of external source shortage. The target is to ensure fluent economic operation of whole technological equipment.
My target is an overall economic assessment of the project for extracting of biomass from various sources. After an overall assessment we got conclusion, that the project can be profitable especially due to own production. Services provided by my farm creates significant additional value.
For family farm founding motivates me also unemployment of several family members.
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