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Assessment of Hazards of Hazardous Chemical Industrial Toxic Substances
Poláček, Tomáš ; Hradil, Jaroslav (referee) ; Mika, Otakar Jiří (advisor)
This thesis focuses on the overall risk exposure of hazardous industrial chemical toxic substances on the human body, describes the physical and chemical properties of the substances, their toxicological properties and environmental hazards. In the practical part is made methodology for assessment of hazards of hazardous chemical industrial toxic substances, depending on the selected properties. Furthermore, is made the basic statistics of actions of the Fire Department of Southern Region to hazardous chemicals in the years 2006 - 2010.
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Estimation of the potential consequences of the release toxic substances
Hajný, Vít ; Kotek, Luboš (referee) ; Tabas, Marek (advisor)
This bachelor thesis is concerned about the estimation of possible impact during the toxic material escape and it is devided into three parts. The first of them contains description of the significant accidents connected with this escape in the Czech republic and in the world. It includes also description of CEI (chemical exposure index), which determine the estimation and there is described the ALOHA (Areal locations of hazardous atmosphere), program whereby we can compare results. The second part is performed an identification and choice of typical accidents. In the last, practical section, are made estimates of potential consequences and their comparison.
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Toxic substances in food and public health
SOSNA, Filip
This diploma thesis dealt with the area of toxic substances in food and their impact on public health. The work aims to describe the types and occurrence of toxic substances, analyze the current state of toxic substances found in food and define their impact on public health. It also aimed to describe the effects of toxic substances on the human body. The work is divided into theoretical and practical part. The theoretical part first introduces the historical origins of the scientific field of toxicology. It also defines basic toxicological terms and parameters. Describes factors affecting the toxicity of substances, absorption, distribution, the effect of metabolism and excretion of toxic substances. Objective 1 was met by describing the basic types of natural and foreign toxic substances. Furthermore, their occurrence was described and their impact on public health was defined. The effects of toxic substances on the human body have been described in relation to Objective 2. The effects of toxic substances can manifest themselves in many ways. It can be mild nausea or even death. The second half of the theoretical part deals with toxic substances in the food industry. It describes a massive increase in the use of chemicals in food and agriculture, whether they are various pesticides, crop treatments, or various additives that are added to foods to improve some of their properties. Some of these substances can have an adverse effect on health, and when we consume them in food in quantities that are permitted by legislation, no one has a clear idea of what the consumption of additives and pesticide residues in food can cause us in the long term. The practical part examines the awareness of the general population about toxic substances in food and their impact on public health. The practical part was created using quantitative research, which was conducted through a questionnaire survey. The questionnaire was created on the basis of the theoretical part of the work. The research group consisted of 114 respondents from the general population. The questionnaire consisted of 21 questions that examined the addressees' awareness of toxic substances in food and public health. The results of the research survey corresponded the given knowledge to two research questions, which asked the work whether the public is oriented in the field and whether they differ according to their education. The results were graphically processed and evaluated. It was found that the public is not very familiar with toxic substances in food and public health. The work can serve as a comprehensive educational material on toxic substances in food and public health. The theoretical benefits of this work include an analysis of the current state of toxic substances in food, including a description of control authorities and relevant legislation in the field of toxic substances in food and public health. Among the practical benefits is the creation of a questionnaire that examined public awareness of this issue. Based on the achieved results, follow-up work can be proposed - for example, exploring the possibility of raising public awareness of toxic substances in food.
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Toxic substances in food and their effects to human health
KADLECOVÁ, Hana
The bachelor thesis "Toxic substances and their effects to human health" deals with characteristics of selected historical periods of toxicology. It describes the basic concepts of toxicology. It briefly characterizes toxic substances of plant and animal origin. More attention is paid to mycotoxins, especially aflatoxins, fumonisins, ochratoxins and zearaleon. A very important part of this thesis is the prevention of the effects of toxic substances on human health and describes the partial measures that are necessary before consumption or preparing of food. The practical part examines the awareness of university students about important toxic substances in food. It assesses whether these students recognize the desired mold species on food. Next it is interested in what precautionary measures are taken by university students before consuming and preparing food. The conclusion of the thesis shows that the know-how of university students is relatively high.
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Estimation of the potential consequences of the release toxic substances
Hajný, Vít ; Kotek, Luboš (referee) ; Tabas, Marek (advisor)
This bachelor thesis is concerned about the estimation of possible impact during the toxic material escape and it is devided into three parts. The first of them contains description of the significant accidents connected with this escape in the Czech republic and in the world. It includes also description of CEI (chemical exposure index), which determine the estimation and there is described the ALOHA (Areal locations of hazardous atmosphere), program whereby we can compare results. The second part is performed an identification and choice of typical accidents. In the last, practical section, are made estimates of potential consequences and their comparison.
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Assessment of Hazards of Hazardous Chemical Industrial Toxic Substances
Poláček, Tomáš ; Hradil, Jaroslav (referee) ; Mika, Otakar Jiří (advisor)
This thesis focuses on the overall risk exposure of hazardous industrial chemical toxic substances on the human body, describes the physical and chemical properties of the substances, their toxicological properties and environmental hazards. In the practical part is made methodology for assessment of hazards of hazardous chemical industrial toxic substances, depending on the selected properties. Furthermore, is made the basic statistics of actions of the Fire Department of Southern Region to hazardous chemicals in the years 2006 - 2010.
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Disposal sites, hazardous waste and its impact on the enviroment, disposal sites management Disposal sites, hazardous waste and its impact on the enviroment, disposal sites management
KAZDA, Jaroslav
The topis of my thesis is waste disposal, especially the disposal site in Lišov run by the firm A.S.A. Inc.. I examine disposal site risks and waste sides impacts on the environment. In the 50th in the last century the solid waste site in Lišov was established. All the disposal produced by urban area inhabitants was deposited in a former brick-clay quarry. After being filled up the site was cultivated and other disposal was deposited in another site nearby {--} also an abondonned quarry. Since 1998, the holder of the disposal site has been the firm A.S.A., Inc., Krajinská 10, 37001 České Budějovice. Nowadays in the disposal site there are seven sectors including a sector for leaking water intake. If necessary, water may flow back to the detention basin, and there is also a degassing system in the disposal site. The disposal site management is being checked - samples of deposit site water, surface water and underground water are being analysed regularly. The hypothesis of negative impacts of disposal sites on the environment was tested in practice. I read through all available information resources to find out that there are hazardous contaminants in the disposal site, some of them in over-limit concentrations, but their migration through underground water was not proved. It means that there is no evidence of a negative impact of the disposal site on the environment and the people living nearby.
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Factors influencing the escape and spread of harmful substances
TESAŘ, Martin
Currently, harmful substances are released to the air more often and they threaten the safety of people because of their increasing amount being operated, stored and transported in the Czech Republic. The present thread is that the disasters in which harmful substances are released do not occur sporadically. Unintentional release may appear during their treatment, storage or transportation for many reasons, especially due to a natural disaster, technical cause or human failure. New causes of release have occurred recently {--} malicious intent and terrorist attack.This thesis creates a complex view of the branches of science and other areas dealing with the spread of harmful substances in the air. Emission of harmful substances is influenced by many factors which are very difficult or sometimes impossible to model mathematically. There exist a lot of mathematical models which differ according to the factor they treat. They concern models of outflow, dispersion and evaporation.The fire brigade in České Budějovice uses only one calculation model for estimating the emission of harmful substances - model ROZEX 2001.The result of this thesis may be used as a model for analysis and assessment of harmful substance release.
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