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Vliv selenu a vitamínu E na kvalitu masa vykrmovaných býků
Navrátilová, Eliška
A control and an experimental group of bulls were set up for the experiment. The bulls were fed the same total mixed ration. The experimental group had this total mixed ration by the addition of vitamin E and selenium. The whole experiment lasted for 90 days. The bulls were weighed at monthly intervals. At the end of the experiment, the bulls were slaughtered at the slaughterhouse. Samples were taken from the muscle, which were wrapped and stored in a refrigerator. Individual analyses were conducted for a total of 4 weeks, from week 0 to week 4 of maturation. Analysis for selenium content and sensory properties of the meat was carried out at the beginning and at the end of maturation. The result showed that the addition of selenium and vitamin E to the total mixed ration did not affect weight and gain. The selenium content in the meat of the experimental group was higher and increased during maturation, while that of the control group was lower and gradually decreased. As the selenium content of the meat increased, the sensory parameters evaluated also improved, whereas the results of the control group were similar at weeks 1 and 4 of maturation.
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Nutritional comparison of animal-based and plant-based foods
Tichá, Kateřina ; Pejšová, Hana (advisor) ; Chrpová, Diana (referee)
The substitution of animal-based foods with plant-based products is common in some alternative diets, but plant-based substitutes are also increasingly consumed by mainstream customers. The aim of this thesis was to compare animal-based foods with their plant-based alternatives and to assess how nutrition professional and the lay public is informed about the differences between them. A total of 223 respondents, 136 of whom had no education in nutrition, participated in the questionnaire survey. The results showed that the awareness of the lay public about the nutritional composition of plant-based alternatives is significantly lower than that of professionals. Furthermore, professionals pay significantly more attention to information on food labels and consider their diet as healthier than the lay public. In contrast, education in nutrition did not have a significant effect on experience with alternative diets or on the frequency of consumption of plant-based alternatives. The practical part of this thesis included market research as well. Differences in composition and nutritional values were found not only between animal-based foods and their alternatives, but also among plant-based products. Soy drinks appear to be the best plant-based alternative to milk, as their protein content is almost...
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Content of risk elements in food for dogs and cats
Hrabalová, Karolína ; Slavíková, Zuzana (referee) ; Diviš, Pavel (advisor)
This bachelor's thesis deals with the determination of risk elements, namely mercury, arsenic, cadmium and lead in dog and cat food. The concentration of mercury was determined using the AAS technique, and the concentration of arsenic, cadmium and lead was determined by the ICP-MS method after microwave decomposition of the samples using mineral acids. A total of 30 feed samples were analyzed. In most samples, the concentrations of monitored elements were lower than the maximum permissible values given by the EU Commission Regulation, two samples did not meet the requirements of the regulation. The concentration of risk elements in the feed, except for arsenic, did not depend on the type of meat used in the feed. Feeds containing fish meat showed demonstrably higher concentrations of arsenic than feeds with other meats. Due to the relatively low proportion of meat in feed and due to the overall lower concentrations of risk elements in meat, it can be assumed that the vegetable or other component of the feed, or the technology of feed production, is responsible for the increased concentration of risk elements in feed.
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Vliv techniky lovu na vybrané parametry masa
ČERNÁ, Barbora
The diploma thesis is focused on the comparison of the quality characteritics of fallow deer meat originating from farm breeding, in cluding the assessment of the influence of different methods of slaughter, gender, and suplementary feeding of mothers during the lactation period on the occurence of qualitative changes in the texture of the meat literature rewiev is devoted to the definition and composition of meat, and then selected characteristics of meat are described individually. At the end of literary part, information about farm breeding is sumarized. In the practical part, the farm breeding of fallow deer of the Friedberger family is presented. Then the results from the analysis of the chemical composition of deer meat are presented, followed by an assessment of the occurrence of qualitative changes in the texture of meat depending on the monitored factors.
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Transfer of radioactive environmental load to the population of the wild boar (Sus scrofa) in selected localities of the south-western part of the Czech Republic
KOUBA, František
The contamination of the food chain of wild boar by post-Chernobyl radioactive fallout is a continuing problem in the forest ecosystems of certain localities in the Czech Republic. This study/PhD thesis is therefore focused on the evaluation of the results of radioactive contamination by radiocaesium (137Cs) of meat of wild boar caught in the localities of Novohradské Mountains and Šumava National Park in the period from December 2012 to December 2019. The aim of the work was to evaluate the occurrence of radioactive load in wild board, identification of possible seasonal trends in measured values of 137Cs, as well as possible differences in selected localities, and to evaluate the presence of 137Cs in raw materials of animal origin, specifically from wild boar, as a possible source of contamination in the human food chain. During the monitored period from December 2012 to December 2019, 137Cs content was measured in 1607 samples of wild boar, of which 654 samples were from the Novohradské Mountains in the South Bohemian Region and 953 samples from the Šumava - South Bohemian and Plzeň Region. The threshold value of 600 Bq/kg of the total amount of caesium was exceeded in 763 samples out of the total number of 1607, which is 47.5%. The maximum value of 137Cs activity was 22,540 Bq/kg, the median value was 522,4 Bq/kg and the average value was 1368,2 Bq/kg. Statistically significant differences were found between localities Novohradské Mountains and Šumava National Park. Samples from Novohradské Mountains exceeded the threshold 600 Bq/kg in 238 out of a total of 654 samples (36,4 %) of caught wild boar. In samples from the Šumava National Park, samples exceeded the threshold in 525 out of a total of 953 samples (51,1 %). When assessing the seasonal effect of the measured values of 137Cs activity in caught wild boar, statistically significant differences were detected in the winter period (November - April), when 137Cs activity reached higher values. The average value in the winter was 1674,23 Bq/kg, the median value was 741,87 Bq/kg while in the summer period (May-October) the average value was 1022,69 Bq/kg and the median value was 376,51 Bq/kg. Differences in measured values are also visible when taking into account the seasonality. In the period from December to May (each monitored year) there was a noticeable increase in measured values in the localities of Novohradské Mountains, in contrast, in the locality of the Šumava National Park this seasonality is not reflected. In general, higher measured values of 137Cs activity were shown by samples from localities of closed forest ecosystems with no or minimal share of pastures and agricultural land.
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Analysis of meat demand in the Czech Republic
Dlasková, Karolína ; Ščasný, Milan (advisor) ; Polák, Petr (referee)
Meat and meat products form the highest share of Czech household expenditures for food. This thesis offers a complex view on the Czech meat market and studies in detail the determinants of meat demand. A review of the most frequently used demand models is included, from which the least squares log-log model is used for empirical analysis. The core of this thesis is the estimation of price and income elasticities of demand for various types of meat based on statistical data of household accounts from the years 2000 - 2012. The estimates are, with the exception of the price elasticity for beef, which equals 0.13, consistent with previous studies. Within the examined period, households manifest unitary income elasticity and own price elasticity of demand for meat equal to -1.2. The temporal evolution of elasticities varies for different types of meat. Important socio-demographical aspects influencing the demand for meat, such as age, education, whether the household is led by a female, and others, are also analysed.
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Traditional and nontraditional farm animals and their importance to human life
Procházka, Jiří ; Hanel, Lubomír (advisor) ; Řezníček, Jan (referee)
The Abstract The main purpose of my thesis is to make summary of conventional and unconventional livestock and their importace to man. My thesis brings in survey of the most significant kinds of breeds and their economic exploitation. A separate section is devoted to Czech breeding of essential kinds of livestock in reference to their conditions and animal production capacity. Out of unconventional groups of livestock, the attention is devoted to birds from out superorder runners. The importace of meat in man's nutrition is widely discussed. As a part of thesis, a public inquiry was compiled and analysed. It was interpreted on samples of students and workers of educational institutions. The inquiry discovers the influence of respondents'demografic field and other circumstances upon meat consummation. As a suplement to the biology education at primary and secondary schools, a CD- ROM is made containing questions to systematic zoology of birds from among superorder runners. Key words: domestication, livestock, runners, meat, inquiry
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Trends and Patterns of Meat Consumption in The European Union
Teiml, Matěj ; Pleticha, Petr (advisor) ; Ehrenbergerová, Dominika (referee)
The goal of this thesis is to research the consumption of meat in the European Union and to look for trends and patterns regarding the consumption. We will take advantage of the panel data structure and use our own balanced panel data set to properly verify and quantify the relationship of macroeconomic, and country specific variables with annual meat consumption per capita. We used data covering the consumption of meat in the European Union member countries in the year of 2018, with data ranging from 2000 to 2018. All data in our thesis are annual and aggregated at the level of single European Union member countries. We used standard panel data analysis tools to reach statistically significant results to recognize and estimate the important determinants of meat consumption in the European Union
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Possibilities of using moringa oleifera in the production of meat products
Richterová, Nikola ; Slavíková, Zuzana (referee) ; Mikulíková, Renata (advisor)
This bachelor thesis deals with the addition of moringa oleifera and its influence on the sensory quality of meat products, specifically wine sausages. The theoretical part describes the meat, the division of meat products, and the basic technological operations leading to their production. Furthermore, wine sausage, its composition, and production technology are characterized. The description of moringa oleifera and its chemical composition follows. The conclusion of the theoretical part is devoted to sensory analysis, conditions for sensory assessment, and the main methods of this analysis. The experimental part is focused on the production of wine sausages with various additions of moringa oleifera and subsequent sensory evaluation of these sausages. When assessing the sensory quality of the sausages, the samples were evaluated according to their appearance, smell, taste, and texture. A total of 25 evaluators, who were representing ordinary consumers, took part in the sensory evaluation. The content of lipids and fatty acids in the samples of sausages was analyzed by gas chromatography. A separate sample of Moringa was also analyzed by gas chromatography. The polyphenol content of the samples was determined by liquid chromatography. Using the Kruskal-Wallis test, it was found that there were statistically significant differences between the samples. The sample with the lowest addition of moringa and the sample without moringa were assessed very similarly and were evaluated as the best. While the sample with the highest moringa addition was rated the worst in all assessed categories.
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