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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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Technical bases of thermography for radiologists.
SOSNA, Filip
The bachelor thesis solved the technical fundamentals of thermography using the curriculum process. The bachelor thesis has investigated the problem in the following way: Goal 1: Perform a system analysis of the technical bases of thermography and adapt the results to the capabilities of radiological assistants - Goal 1 was accomplished by performing a system analysis of the structural levels of the technical bases of thermography. Goal 2: Perform a comparative analysis of the technical bases of thermography abroad and in the Czech Republic - Goal 2 was met by comparison between America, Asia and Europe and the Czech Republic (with an unsuccessful result for the Czech Republic). Goal 3: To transform the results of system analysis, adapted to the needs and possibilities of future radiological assistants, into educational form - goal 3 was fulfilled on the basis of selected educational theory and its application. Goal 4: Choosing a suitable educational theory to convey knowledge about the technical bases of thermography to radiological assistants - Goal 4 was accomplished by selecting the theory of the curricular process. Hypothesis H1: Educational form of the technical basics of thermography for the examined group of recipients can be created by applying the theory of curricular process - Successful implication of individual variant forms of the curriculum on the research field of technical basics of thermography enabled the hypothesis H1. Hypothesis H2: Knowledge of the recipients of education in the field of technical basics of thermography will have a Gaussian distribution close to the implemented distribution curriculum - Successful application of selected types of theoretical distributions (exponential distribution, normal distribution) to the result of the educational test. The theoretical benefits of the thesis include the design of structural levels of the system of technical basics of thermography. The practical benefits of this thesis include, for example, creating an educational text and a test for the technical basics of thermography. Based on the achieved results, it is also possible to propose follow-up work - eg exploring the possibilities of increasing the use of thermographic imaging methods in the Czech Republic.
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