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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
The evaluation of milk quality in selected countries of European Union
 POKORNÝ, Martin
The diploma thesis deals with the assessment of qualitative indicators of raw cow's milk supplies within the European Union (EU) and the Czech Republic (CR), de-pending on the year and course of the year. Within the EU average values for the observed period 2016-2020 were found for fat contents of 4.01 ? 0.26% and protein content of 3.39 ? 0.13%; in the CR 3.91 ? 0.11% and 3.46 ? 0.08%. The effect of the year within the EU countries was demonstrated only in terms of protein content (p <0.001). When evaluating the effect of individual months in EU countries, includ-ing the CR, statistically significant differences in fat (p <0.001) and protein (p <0.001) content were demonstrated. In summer, the values of both components in-creased, while in winter they decreased. The results of the evaluation of bulk milk samples purchased in the CR show, depending on the year, that the effect on the total bacteria count (p <0.001), residues of inhibitory substances (p <0.05) and freez-ing point of milk (p <0.001) was also found. The effect of the year was elicited for the total bacteria count (p <0.05) and the somatic cell count (p <0.001). From the point of view of milk sales, the quality of raw milk is a primary goal for the producer and at the same time a decisive factor in the monetization of this important animal commodity.
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Selected milk quality parameters in cured cows
 HRUBEŠOVÁ, Kristýna
The work deals with the monitoring of selected indicators of milk quality including residues of inhibitory substances (RIS) in the milk of cows treated with selected groups of antibiotics. It contains an analysis of selected factors that act on these indicators. The theoretical part deals with the inhibitory substances, their effects on the human body and the processing technology. The paper describes the application of antibiotics to treat mastitis and drying off cows including factors that affect the excretion of antibiotics in milk. The legislative regulations relating to this issue are also a part of the theoretical section. The practical part is divided into three parts. The first part focuses on the characteristics observed in cows treated within selected businesses and farms. The second part is focused on the assessment of the quality parameters studied samples (fat, protein and somatic cell count) and the third part is devoted to factors that influence the presence of RIS in milk samples. In determining the quality indicators monitored in milk treated cows, it was confirmed that the protein content and static cell count (SCC) are in these cows due to disease increased and the mean value of the SCC did not correspond to a given limit legislation. When monitoring factors affecting presence RIS, it was found that the method of drug administration group and used antibiotics have influenced the presence RIS after the withdrawal period.
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