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Neurobiology of food addiction
Cíbiková, Sofia Anna ; Novotný, Jiří (advisor) ; Petríková, Ivana (referee)
This work deals with food addiction, mainly its neurobiological basis. The fact that highly processed food high in calories can have effects similar to those of addictive substances has been known for decades, however with the rapidly increasing prevalence of obesity in the last few years, there is more and more research being done in this area. Food addiction very often correlates with obesity and eating disorders, such as binge eating disorder, and naturally has a negative impact on the health of an increasing number of people. Excessive consumption of highly caloric foods causes changes in the neural pathways in the brain, especially those connected to dopamine and the reward system which, similarly to substance use disorders, leads to addiction, which manifests itself in loss of control over the consumption, developed tolerance and withdrawal symptoms. Stress together with various mental health disorders such as depression and anxiety are often factors contributing to the development of addiction. Understanding the similarities between food addiction and substance use disorders can be beneficial for finding an appropriate treatment. Cognitive intervention and therapeutic methods seem to be the most effective, on the other hand strict diets and efforts to make major lifestyle changes often bring...
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Utilizing of Electron Microscopy for Nanoparticle Detection in Selected Food
Boriková, Natália ; Hrabalová, Vendula (referee) ; Dzurická, Lucia (advisor)
This bachelor thesis deals with the detection of nanoparticles in selected food products using electron microscopy. Specifically, silver pearls, silver powder and food grade whiteness were selected for this purpose. Nanoparticles themselves can have a negative effect on the human body in high concentrations. They need to meet certain legislative standards. The main focus of this bachelor thesis is how nanoparticles could be detected in food. The theoretical part provides an insight into the properties of nanoparticles, their applications and describes methods for their determination, primarily with an emphasis on electron microscopy. In the practical part, solvents with artificially added nanoparticles were prepared and served as standards. Two samples were prepared from selected foods – with and without the addition of nanoparticles. They were analysed using low-energy electron microscope of LVEM 25E type along with elemental analysis using energy dispersive spectroscopy (EDS). The results provide the compositions of the foodstuffs in question and information on the presence of nanoparticles on their own. This research contributes to a better understanding of their characteristics and safety.
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Data Collection Device for Food Chain Monitoring Domain
Kováč, Richard ; Vašíček, Zdeněk (referee) ; Šimek, Václav (advisor)
The goal of this thesis is to explore the legal and practical requirements of food chain monitoring in different types of storage facilities and to design and build an IoT sensor based on gathered data and real-life requirements. The thesis features a short description of legal requirements for food storage safety and food storage techniques. It also explores real life conditions and devices used in food storage monitoring in goverment-ran facilities. The thesis describes IoT sensor design using discovered leagal requirements and data gathered from observations and consultations. It features an abstract design concept, selesction process of electronic components, schemtics design and PCB design for and IoT sesnsor. The thesis then describes hardware assembly as well as enclosure CAD design with the requirement of minimal size. It also describes firmware developement process, features of this sensor and describes best practices for firmware developement for battery powered IoT devices. Finally, it evaluates collected data and explores possible future developement.
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Možnosti využití planě rostoucích rostlin ve výživě člověka
JEZLOVÁ, Jana
Wild edible plants and weeds were once commonly used as vegetables or spices. Our ancestors valued them for their nutritional and taste properties as well as their medicinal properties. The aim of this study was to elaborate the possibilities, benefits and prospects of using wild plants in human nutrition in our area. The work is based on the historical and geographical context, draws on the influence of tradition and culture on the consumption of wild plants and weeds, and takes into account the aspect of their protection from overharvesting and extinction. Particular attention is paid to nutritional properties, toxicological risks are highlighted, and the possibilities of collecting plant parts and their culinary preparation are described. On the basis of a literature search, an overview of the plants was compiled from available publications, indicating their characteristics and uses. A comparison is made with other ethnobotanical studies carried out in the Czech Republic and neighbouring countries. A questionnaire survey on attitudes towards consumption of wild plants demonstrates changing motivations for their use, preference for green parts of plants, their consumption in their raw state and in simple adaptations. In conclusion, twelve plant species are recommended for convenient use (Aegopodium podagraria, Alliaria petiolata, Allium vineale, Bellis perennis, Crataegus laevigata, Epilobium angustifolium, Galinsoga parviflora, Helianthus tuberosus, Impatiens glandulifera, Stellaria media, Reyoutria japonica, Viola odorata) with their detailed characteristics, nutritional benefits, processing possibilities and the reasons why these species deserve attention and inclusion in the diet.
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Vyhodnocení stravovacích návyků a příjmu energie a vybraných živin u vysokoškolských studentů.
PAVELKA, Filip
This master's thesis deals with mapping the dietary habits of university students and evaluating the level of energy intake and main nutrients in a selected sample of uni versity students. The literary overview of the issues addressed is focused on the area of rational nutrition and dietary habits of persons in the age of university students, the importance of energy and the main nutrient in a person's nutrition. The research part is focused on two areas. The first is to assess the menus of a selected sample of ten students, five of them women and five men, who recorded four weekly diet plans for four months (May, July, October and December). The research part is focused on two areas. The first is to assess the menus of a selected sample of ten students, five of them women and five men, who recorded four weekly diet plans for four months (May, July, October and December).
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Goodbye piece
Preťová, Nikola ; Brody, Ondřej (referee) ; Klímová, Barbora (advisor)
In my master thesis named Goodbye piece I explore food and fine arts as two individual creative processes. I notice the differences and similarities between them and based on my finding I create an installation artwork and text documentation.
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Detection of anomalies in network traffic using compression methods
Blažek, Libor ; Dvořák, Jan (referee) ; Blažek, Petr (advisor)
The objective of the thesis is to design a practical demonstration of the functionality of selected compression methods. The following chapters will discuss the attacks on terminals and mentioned some measures. The show will be processed using two methods development environment. The attacks will detect anomalies in the network and subsequently carried out at one of the sample data compression methods. Data will be collected as normal operation at the terminal station, and then in the attack.
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Material history of planetary urbanization
Šana, Václav ; Bartůšek, Ondřej (referee) ; Kristek, Jan (advisor)
The diploma thesis deals with the final urbanization of the planet term from a materialistic point of view. The distribution of freshwater, energy consumption and especially agricultural food production are the basic factors which, together with logistics and demography, form fundamental drivers of material history. The "Malthusian" fear of a situation where the world's population is running out of resources accompanies contemporary rhetoric. The aim of the work is to try to find and explore solutions to the material necessities of humanity and to design organizational principles, systems, urban and architectural solutions.
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Determination of the risk elements and other elements concentration in animal feed
Křehlíková, Jana ; Juglová, Zuzana (referee) ; Diviš, Pavel (advisor)
This thesis deals with the determination of selected microelements and macroelements and risk elements in dog and cat food. The theoretical part describes the nutrition of dogs and cats and focuses on the safety of the food in the context of contamination with risk elements. Another topic discussed is the chemical analysis of feeds, specifically the determination of nutritionally important substances, beneficial elements, and contaminants. The experimental part deals with the preparation and digestion of feed samples and the subsequent analysis of these samples using ICP-OES and AAS methods. The detected concentrations of the elements of interest in the feeds were compared with the feed standards issued by the Department of Veterinary Medicine and the decree issued by the Ministry of Agriculture. The analysed feeds were found to be deficient in some elements. The content of the risk elements in the feed met the legal limits and did not pose a health risk to the animal. Elements for which the legislation does not provide a maximum permissible limit were present in the feed-in in high concentrations that could already harm the animal's health.
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Assessment of chosen aromatic compounds in foods
Ascherová, Adriana ; Buňka, František (referee) ; Vítová, Eva (advisor)
This diploma thesis is focused on aromatic substances occurring in food. The theoretical part describes their characteristics, the use of fragrances of plant origin for flavoring of food and points to their possible negative effects on the human organism. Twenty six potentially allergenic fragrances are thus identified in European legislation and an overview of their physical properties, occurrence and use is also processed in this work.The aim of the experimental part was to develop and validate a method for assessment of fragrances using headspace solid phase microextraction combined with gas chromatography (HS-SPME-GC-FID). The following parameters have been validated : repeatability, linearity, limits of detection (LOD) and limits of quantification (LOQ). The HS-SPME-GC-FID method was finally applied to selected samples of foods commonly available on the market.
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