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Assessment of chosen aroma compounds in foods and cosmetics
Obrdlíková, Blanka ; Hrstka, Miroslav (referee) ; Vítová, Eva (advisor)
This diploma thesis is focused on the problematic of assessment of allergenic aroma compounds in various matrices. In the frame of European legislation 26 of potentially allergenic compounds are stated, whose content in cosmetic products is limited. In the case of foods there is not such restriction so far. In the experimental part, the allergenic aroma compounds in chosen samples of cosmetic and food samples were identified and quantified using Solid phase microextraction in conjunction with gas chromatography. Sensory evaluation of aroma or taste is also included.
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Faktory ovlivňující kumulaci ftalátů v potravinách
Němečková, Tereza
The bachelor thesis Factors influencing phthalate accumulation in food has the character of a literature search and deals with factors that influence phthalate migration into food. Phthalates are lipophilic organic compounds that are used to soften plastics. As a result of human activities, they enter the environment, from which they subsequently enter the human food chain. However, food contamination also occurs during production and storage. Factors that influence the migration of phthalates into food include the contact time of the food with the polymer, storage temperature, ultrasound, pH of the food, UV radiation, type of preservative, and composition of the packaging material and food. Phthalates have negative effects on human and animal health. They cause reproductive disorders, allergic reactions, immune system disorders, cardiovascular problems and are carcinogenic.
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Antimikrobiální rezistence a její šíření v potravinovém řetězci
Maršová, Nikol
The bachelor thesis deals with the resistance of microorganisms to antimicrobial agents and its subsequent spread in the food chain. It focuses mainly on the resistance of microorganisms to antibiotics, in relation to the types of antibiotics according to their chemical structure and their mechanism of action. It describes the basic principles of agents used against viruses, yeasts, fungi and parasites. Characterises the nature of the emergence and mechanisms of resistance. It also discusses the methods used to determine the resistance of microorganisms to antimicrobial agents. Describes when resistance of microorganisms began to emerge historically and its occurrence in different sections of the food chain. In relation to the spread of antimicrobial resistance in the food chain, it describes the most serious zoonotic agents today.
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Slevové akce a jejich vliv na chování spotřebitelů při nákupu potravin v kontextu plýtvání potravinami
Brodský, Marek
BRODSKÝ, M. Discount promotions and their influence on consumer behaviour when purchasing food in the context of food waste. Diploma thesis. Brno: Mendel University, 2023. The diploma thesis deals with discount events and their influence on the be-havior of consumers when buying food in the context of food waste. The aim of the work is to identify factors influencing the buying behavior of consumers befo-re, during and after buying food. Furthermore, based on the results of the re-search, to propose possible recommendations for food sellers. Primary data are obtained from a questionnaire survey (n = 238) and in-depth interviews with household representatives (n = 11). As part of the work, basic statistical indica-tors are calculated and hypotheses are verified. According to the survey, 89.8 % of consumers use discount promotions during their purchases and as much as 57,8 % of consumers postpone their purchase due to an expected discount pro-motion.
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Obalové materiály používané v potravinářském průmyslu
Peter, Jiří
Conventional food packaging materials face incoming innovations with intention to increase the sustainability of packaging industry a to extend the shelf life of food. Theoretical thesis focuses on describing all the possible groups of packaging materials and the current legislation required. Special attention is given to active, intelligent and edible packaging. The review concludes with information about food packaging safety and its impact on consumer health. Bisphenol A, melamine, formaldehyde or phthalates belong to the substances restricted in recent years. In this point of view the food packaging safety is limited by the amount of toxicological data and migration studies. Edible packaging brings solution for extending shelf life of food, most promising results have been found in delaying microbial spoilage and maintaining sensory properties of foodstuff for longer period of time. For practical applications European union still lacks any regulations.
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Dopad energetické krize na chování spotřebitele v oblasti stravování
Majerová, Jana
This Bachelor theses focuses on the impact of energy crisis on consumer be-haviour in food consumption. The theoretical part describes concepts related to consumption behaviour. Theoretical part also includes energy crisis description, its development and impact on consumer. Practical part includes the analysis of results of the questionnaire survey.
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Chování spotřebitele na trhu privátních značek
Barančicová, Terezie
Barančicová, T. Consumer behaviour on the private label market. Diploma thesis. Brno: Mendel University, 2023. The diploma thesis is dealing with consumer behaviour on the private label market. It also focuses on consumer behaviour on the private label food market in the online environment. The goal of the thesis is to identify factors influencing behaviour on the private label market based on the results of the author's own survey and to divide consumers into individual segments with the help of a clus-ter analysis. Two segments resulted in this thesis are conservative consumers and 21st century consumers. Finally the series of recommendations for the supply side of the market is presented. Recommendations include a blind test, a focus on quality, events with free shipping or benefits when paying by card.
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Biodostupnost vitamínu C z různých zdrojů
Gabrhelová, Lucie
Vitamin C is classified as a hydrophilic vitamin and performs several functions in the human body. It is necessary to obtain it from food, because people have lost the ability to create it due to evolution. Fruits and vegetables are the most important food sources. It is a relatively unstable vitamin and its losses can occur during food processing. Therefore, there are gentler methods of adjustment by which it is possible to limit the given losses. In order to increase stability and thus bioavailability, other methods are also used, most often different types of encapsulation. In addition to food, vitamin C can also be obtained from dietary supplements. These are available on the market in several forms, which differ not only in price or appearance, but above all in the bioavailability of vitamin C itself. The most effective form is liposomal vitamin C, which is in this form able to ensure high bioavailability of vitamin C.
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Trendy ve využití hmyzí suroviny v potravinách
Polák, Daniel
This bachelor thesis deals with the use of edible insects material in the food industry. Around 2000 edible insect species have been recorded worldwide and are commonly consumed in Africa, Asia and Oceania. In recent years, edible insects have also become a major topic of discussion in the Western world. In the European Union, legislative steps have been taken to categorise certain species of the edible insects as food. On the European market, products made from the yellow mealworm, the house cricket, the migratory locust and the lesser mealworm can be found. These edible insects are a rich source of protein, fat, vitamins and minerals. It also contains the fibre chitin which is associated with lower digestibility of insect products and may also act as an allergen. Some nutritional substances may be subject to the development of innovative technologies. For example, proteins from the migratory anemone have the potential for the development of edible packaging or chitin fibre may be another alternative source to obtain chitosan.
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