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Výživa telat do třetího měsíce věku
Bázlerová, Lenka
The aim of this work is to understand the importance of proper nutrition of calves up to the 3rd month of age. The reason is that just the healthy and vital calf is able to use the maximum of the genetic potential in the production period and thus has a positive influence on economy of the breed. The first part of the work describes the current state of cattle in the Czech Republic, which includes statistical data on born and dead calves. The development of calves is divided into three specific periods: colostrum, dairy and plant feed. The colostrum period is mainly focused on the quality of the colostrum, the hygiene during feeding or the ways of influencing the quality of the colostrum. The milk period describes ways of feeding calves with milk and milk replacer. It is decribes as well how to get used to plant feed. The plant feed is necessary mainly for the weaning of calves. To the end there is described the most common mistakes in the nutrition and feeding of calves and the effects on their health.
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Odchov telat s použitím různých dávek mléka
Paulíčková, Michaela
The aim of the thesis was to compare the effect of feeding calves with different doses of milk on their health condition, weight and weight increment, consistency of faeces, blood parameters and the effect of plant nutrition. The experiment was carried out with 2 groups of calves (n = 30), the first group (experimental) was fed with 6 liters of milk per day and the second group (control) with 10 liters of milk per day. Calves were fed twice a day and had drinking water and starter all the time. Calves were fed with colostrum within 2 hours of delivery and were on colostrum nutrition for 3 days, the fourth day they were included in the experiment, they were weighed and converted to the milk feed mixture. The second weighing was done at the end of the experiment at the age of 38 days. The third weighing was done at the age of 155 days, when the calves were on plant nutrition. The average birth weight of all calves was 33,5 kg. The final weight was statistically significantly lower in the experimental group, the average final weight was 57.8 kg and in the control group 65.9 kg. The mean total weight increase in the experimental group was 26.4 kg and in the control group 30.3 kg. The intake of starter was statistically significantly higher in the experimental group. The experimental group had a better evaluation of faeces consistency. On the second blood collection, the experimental group had a blood ?-glutamyltransferase level over the reference range, and it was 0,62 µkat/l and the difference between the experimental and control group was statistically demonstrated. Statistically significant was the higher albumin level in the control group at the second blood collection. The results of the experiment clearly do not show a better or worse effect of feeding different doses of milk during the milk diet, higher doses of milk provided higher weight increase during the milk diet, which means higher economic costs.
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Design and modernization of automotive starter
Bednář, Vojtěch ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
The work deals with modernization of an automobile starter. In first and second part, we can find the analysis of types of starters according to construction and the analysis of gear of a starter. In third part, there is the analysis of electromagnetic layout of direct current motor with permanent magnets according to given parameters which is the gear of given starter.
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Automotive Electric Motors Innovation
Šimko, František ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
The purpose of this project is to explain the construction of motors in car technology. We can acquaint more with the construction of a DC electric motor. Then we will deal more with electric motor starters, an innovation of a DC electric motor or with its replacing for AC electric motor with other poles.
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Ejection mechanism automotive starter pinion
Sláma, Miloslav ; Janda, Marcel (referee) ; Hájek, Vítězslav (advisor)
The thesis describes ways ejection pinions automotive starter and evaluation of the advantages and disadvantages of each solution. The first chapter deals with the principle of operation of DC motors and starters parameters. In the second part, the individual systems are theoretically discussed in terms of design and their advantages and disadvantages. The third part is focused on the most common system, which is analyzed in terms of mechanical and electrical reliability. The last point of the work is to design an experimental analysis Reach starter pinion.
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Analysis, design and optimization of automotive starter
Benetka, Martin ; Hýsek, Roman (referee) ; Hájek, Vítězslav (advisor)
This thesis aims at automotive starters, their construction, characteristics and problems with starting at low temperatures. There are kinds of starters, function principle, construction, advantages and disadvantages in the first part of thesis. Issues with combustion engine starting and basic technical requirements are also mentioned here; characteristics and importance of starters and combustion engines are also described. Last chapters of this part are dedicated to finite element method and its implication. There are analytical calculations of starter in the second part of thesis. Results are compared with experimental obtained (measured) values and results from RMxprt. Finite element method results are compared, too. Magnetic induction improvement in stator is also suggested.
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Metabolic activity of mezophilic milk souring in production of cheeses with white fungus
Štěpničková, Jana ; Vítová, Eva (referee) ; Babák, Libor (advisor)
The thesis was processed in cooperation with Pribina s.r.o. The aim of the thesis was the monitoring of the starters of cheeses with the white fungus on the surface. The thesis was engaged in the monitoring process of a souring curve of used starters. This monitoring was based on temperature, titrating acidity and pH measured in the time interval. The souring curve was evaluated as the indirect measurement change of acidity of the starter in the time period. Further, the activity of detached starters was measured. The measurement was based on the change of pH measured in the time period. The influence of the culture medium was monitored by changes in behaviour of the bacterial cultures. The monitored starters were compounded of mezophilic and termophilic bacterial strains.
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"Start&Stop" system spark ignition engine, passanger car implementation
Kubiš, Milan ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
My bachelor work describes a system implementation Start&Stop and its usage in passenger cars with gas engine. The work details reasons for the usage of this system and technically describes the basic elements. It shows different constructions of the systems, their advantages and disadvantages, both from the point of the influence over the car movement and in terms of the motoring comfort and the safety of running, especially in the urban environment.
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"Start&Stop" system diesel engine implementation into passenger car
Fajkus, Martin ; Drápal, Lubomír (referee) ; Rasch, František (advisor)
This thesis treat of implementation „Start&Stop“ system off passenger car with diesel engine. Creates summary of adjustments and changes necessary to insertion system, further critize effect of system on ride vehicles, as on the part of komfort so and safety factor, the advantages and disavantages in urban and super urban cycle. This system has not always been ranked separately, will be there described superiors systems, on which is implemented.
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