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Season changes in milk efficiency and fertility of the cows in relation to the temperature and humidity environment conditions
ŤOUPALOVÁ, Michaela
High level of fertility and milk efficiency be ranked among major premise profitability of the company. If are not i extenso independent all necessaries of life dairycows, it is impossible expect favourableness. Human factor have in locking needs dairycows most important and fungible role, above all in the area corresponding sustenance and correct rearing technique and attendance fiduciary animals. On fertility and milk efficiency affect all row of other factors, from which ours imposition was evaluate seasonal establishment temperature influence and relative humidity. Average milk yield in herd Holstein cows attained 6 254 kg milks behind standardized lactation 305 days. Avarage deily vessel descending reduction on standardized lactation do 20,5 litre. Highest values reached average daily milk yild in spring 22,09 litres milk during lactation. Big throughs was recorded in summer, average daily vessel doed mere 16,96 litres milk during lactation. By the help of ANOVA test was ascertained statistically significant difference on significance level P 0,05 among spring and summer, among spring and winter, among summer and autumn and among summer and winter. Effected regression analysis confirmed fall average daily milk yield depending on raising temperatures inside stabling. Maximum cows at average daily efficiency about 20 - 23 litres milk here of achievement reached at 10 - 12 °C. Optimum thermal balk strode low-water mark of 28 x plus upper boundary 247 x. Temperature above 20 °C was overstepped 104 x. Optimum D shell relative humidity crossed ceiling 211 x. Average meantime in heard attained 419 days, SP 127 days and insemination interval 78 days, near over most 50 % cows was level fertility evaluation like bad. According to results ultrasonografik investigation gravided every 3. - 4. cow, which is wanting. In case executant defects was highest percent occurrence recorded near sweeping and ovarian cysts. Influence of season, let us say temperatures on fertility indices plus defect incidence wasn´t evidenced. Bad level fertility had in the framework year continual course.
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Analyze of prediction restint energy expenditure at polytraumatic patients
Aimová, Petra ; Hronek, Miloslav (advisor) ; Kovařík, Miroslav (referee)
(anglický) Comparison of 15 predictive equations, used for estimation of Resting energy expenditure (REE), versus experimental REE values, obtained using indirect calorimetry on a group of polytraumatic patiens (n=30), spontaneusly breathing (n=20) and ventialted (n=10), hospitalised on Intensive Care Unit, is presented. Calculation is based on measurement of physiological and functional parameters. Between both groups of patiens, the highest level of concordance between experimental and calculated data was achieved using Mifflin's, Livingston-Kohlstadt's ans Johnstone's equation. The smallest difference between predicted and measured value REE of spontaneously breathing patients was achieved using Bernstein's, Owen's and Johnstone- Ireton's equation and ventilated Bernstein's and Owen's equation. Using bioimpedance determination of excessive body water ("overhydratation") and modification of body mass substractiing this amount, precission of REE prediction was increased. Aplication of correction factors did not extensively increased te concordance of data calculated.
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Human powered electric sources
Naller, Ivan ; Škoda, Jan (referee) ; Baxant, Petr (advisor)
The aim of this work is to map sources of electricity-driven man. It is divided into three parts, the first of which deals with the muscles of the human body and essential components of the diet. The second part includes a search created prototypes of generators from small to big achievements. The last part is focused on the performance that can be achieved in a given individual and the associated energy demands of humanity. After the experiment, it is apparent that the average power of man is in the range of 150 to 300 W. On the basis of the data obtained it is possible to use the energy generated man (in gyms, fitness centers ....) for lighting, or simple applications such as water heating etc.
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A company in the regulated Water Industry
Vopatřilová, Lenka ; Hnilica, Jiří (advisor) ; Nešporová, Jaroslava (referee)
The Thesis intends to introduce business in government regulated Water Industry, accurately the area of Water Supply and Sewerage. Its aim is to describe the business market of this field. Moreover, to find out whether the companies in private multinational corporation ownership don't burden their customers with too high price of water supply and find if there is any relationship between the price of water and the profitability of these enterprises. To achieve this aim, companies are categorized into five groups and compared. These groups are created on the basis of the shares of private foreign corporation. A separate group is made of companies that are in ownership of municipalities that means without the influence of private foreign corporations. Firstly the one component prices are compared, then two-component ones. In conclusion, these prices are compared to profitability of these enterprises.
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Matematická analýza a výpočtový algoritmus Rayleighovy-Plessetovy rovnice v okolí prudkého kolapsu bublinky.
Petrík, Peter ; Maršík, František (advisor) ; Rudolf, Pavel (referee)
The Rayleigh-Plesset equation is commonly used to describe the dynamics of spherical bubbles in water. However, as high-speed observations show, the bubble looses its spherical shape during the violent collapse and often ssions into a number of smaller bubbles before it rebounds again or dissolves completely. The objective of the work is to bridge the gap between the \spherical\ Rayleigh-Plesset approach and the \non-spherical\ behavior of the collapsing bubble in conditions when the Rayleigh-Plesset equation is no longer valid. The objective is achieved in 3 steps. First, the new criterion for the assessment of the reliability of the Rayleigh-Plesset equation is proposed. Second, the analysis of the shape stability of the spherical surface of the bubble during the collapse lead to the development of a physical model, which incorporates the loss of shape stability, surface energy dissipation and the ssion process. Moreover it estimates the number of bubble fragments as well as conditions when the ssion occurs. Finally, theoretical results are incorporated into the complex numerical code, with the focus on error estimation, specially propagation of rounding error. The sample numerical results for typical hydrodynamic cavitation situations were calculated. The results of this work have to be further con rmed...
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Voltammetric Determination of Genotoxic Nitrobiphenyls
Horáková, Eva ; Vyskočil, Vlastimil (advisor) ; Navrátil, Tomáš (referee)
The presented diploma thesis is devoted to study of determination of 4-nitrobiphenyl (4-NBP) in model river water by DC voltammetry (DCV) and differential pulse voltammetry (DPV) at m-AgSAE (diploma thesis relates to bachelor thesis, in it DCV and DPV methods for determination of 4-NBP in deionized water were developed). Limit of determination (LOD) is 2·10-7 mol·l-1 by DCV and 4·10-7 mol·l-1 by DPV. The adsorptive stripping DPV (AdSDPV) technique was tested to archive lower LOD the AdSDPV, optimal conditions were not found. Electrochemical behavior of 2-nitrobiphenyl (2-NBP) at m-AgSAE was studied. Optimal conditions for its determination by both techniques DCV and DPV were found in methanol-0,01 mol·l-1 LiOH (1:9) and in this medium peak current dependence in 1·10-7 mol·l-1 to 1·10-4 mol·l-1 2-NBP (LOD ≈ 2·10-7 mol·l-1 by DCV and 1·10-7 mol·l-1 by DPV) concentration range was measured. Developed methods were successfully tested for determination of 2-NBP in drinking and river water samples. For both mediums obtained LODs were 2·10-7 mol·l-1 by DCV and 1·10-7 mol·l-1 by DPV. AdSDPV technique was unsuccessfully tested to achieve lower LOD. Optimal conditions for simultaneous determination of 4-NBP and 2-NBP by DPV technique at m-AgSAE were found: methanol-0,25 mol·l-1 acetate buffer (pH = 6,0) 3:7....
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Objemové nanokrystalické materiály na bázi oxidu hlinitého a zirkoničitého
Chráska, Tomáš ; Klementová, Mariana
An alternative method to produce bulk nanocrystalline materials is to produce amorphous material by rapid solidification and then by controlled crystallization introduce nanocrystalline structure. One technique capable of achieving rapid solidification in materials is plasma spraying. Feedstock material for plasma spraying was composed of about 15 wt.% of SiO2 in addition to the near eutectic ratio of Al2O3 and ZrO2 compounds. Amorphous coatings and free standing parts from this material prepared by water stabilized plasma torch (WSP) exhibit very low porosity and high hardness. When heat treated, the as-sprayed material crystallizes just above 950ºC with an associated volume shrinkage of 1.8%. The volume shrinkage does not cause material breakup. Short heat treatment of the as-sprayed material produces a very fine nanocomposite structure within each splat. Each splat contains nanocrystallites with average size as small as 13 nm.
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Utilization of Biology Olympiad in schools and implementation of selected tasks into highschool teaching.
Dvořáková, Darina ; Janštová, Vanda (advisor) ; Drda Morávková, Alena (referee)
This thesis deals with the Biology Olympiad and remaking of selected tasks of region round. The remaked tasks can be used in highschool education. The thesis includes theoretical and practical part. The theoretical part provides general information about the Biology Olympiad (BiO), charts the achievements of Czech students in International Biology Olympiad (IBO), includes literary review of selected topics. The practical part encompass four remaked tasks of different topics: Eucaryotic cell as a mosaic, Water in life of animals, Animals' areas and their distribution, History of the flora in Czech Republic. The tasks are processed in the form of worksheets. The worksheets were tested at schools. Knowledge of students was tested by using of created pretests and posttests. The practical part also presents the result of research based on a questionnaire survey focused on the involvement of school in BiO and teachers' opinions on these topics.
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Improving of dispersion of silica fume in high performance concrete
Janča, Martin ; Koutný, Ondřej (referee) ; Šiler, Pavel (advisor)
The goal of this work was to create a method for improving the dispersion of silica fumes for use in high performance concrete. Traditional methods used to design and manufacture high performance concrete emphasize the removal of coarse aggregates. Use of specially sorted fine aggregates at relatively low doses, the use of super-plasticizers and siliceous excrement. The low water content was achieved by using superplasticizer on a polycarboxylate basis. The standard ultrasound technology found in each laboratory was selected for the dispersion of silica fume. For experiments were we used dry silica fume powder and aqueous stabilized suspension. For comparison, were prepared different mixtures which showed the effects of the treatment prior to the use of silica fume.
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HPLC Determination of Delta-9-tetrahydrocannabinol
Bažantová, Aneta ; Jezberová, Michaela (advisor) ; Lázníčková, Alice (referee)
Title: HPLC determination of delta-9-tetrahydrocanabinol Author: Aneta Bažantová Supervisor: RNDr. Michaela Hamerníková, Ph.D. Department: Department of Biophysics and Physical Chemistry The aim of my work was to develop a suitable analytical method for forensic application (without heat treatment of examined sample during analysis to prevent an increase of ∆9 -THC content in the sample) to detect delta-9-tetrahydrocanabinol from cannabis. I optimised and validated conditions of high-performance liquid chromatography (HPLC) method for the quantitative analysis of delta-9-tetrahydrocannabinol (∆9 -THC) in the n- hexane extract of marihuana. Quantitation was accomplished with the internal standard (IS) method using beta-17-estardiol acetate. The separation was achieved on a reverse-phase C18 column, using methanol and water (90:10) as mobile phase. The compounds were eluted isocratically at a flow rate of 1ml/min. The compounds were analyzed with fluorescence detection at 220nm/317nm. The retention time of ∆9 -THC and the IS was 9.97min and 5.25 min, respectively, and the total run time of the assay was around 10 min.The validation characteristics included linearity, accuracy, precision, limit of detection and quantification and robustness. The calibration curve was linear over the range of...
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