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Fish hatcheries do not always provide optimal conditions for controlled reproduction and production of high-quality juvenile in northern pike. This study was undertaken to optimize reproduction and intensive juvenile culture of northern pike (Esox lucius L.) under controlled conditions. The efficacy of traditional treatments for induction and synchronization of ovulation in northern pike (carp pituitary or ambient outdoor conditions) was compared to that of sGnRH-a at 50 and 100 ?g kg-1 with or without Freund´s incomplete adjuvant and dopamine inhibitor (metoclopramide, 8 mg kg-1). Ovulation was observed in females treated with carp pituitary (3 mg kg-1) and in those held in ambient conditions. Sperm motility parameters were compared in northern pike and sterlet (Acipenser ruthenus Brandt). Analysis was accomplished via high speed video microscopy complemented with CASA analysis. This work described recently developed methods of recognizing and quantifying sperm quality. The data obtained will lead to more accurate modeling of flagellum behavior during the motility period and provide a deeper understanding of basis of spermatozoa motility. The effect of water temperature on duration of embryo ontogenesis and hatching period; fertilization and development to the gastrula stage; hatching rates; and quality of larvae including larval size, development, and resistance to osmotic stress under controlled conditions for northern pike were investigated. Results indicated that the optimal temperature range for northern pike embryo development under controlled conditions is 6-10oC. Northern pike embryonic development hypothetically ceases at approximately 3.3 °C. In the certified methodology the basic aspects of controlled reproduction of northern pike was described and explained, including optimization of broodstock management. An objective of the certified methodology was to describe methods for producing high quality juveniles.

The theme of my graduation theses was Marketing market research of a selected company. The firm was manufacturing corporation HBSW Inc. Byňov. The aim of the thesis was take the requirements of consumers and take the market potentials with bottled water. I solved the questions e.g. what influences the end user (for example: price, advertising, flavour, packaging) and farther structure of the end user (form example: age, sex, education, employment). I studied the professional books and the digest of these books is in the second part of my work. The questionary had twenty-three questions. Eight questions appertained to the shopping behavior, ten questions appertained to the consumer behavior, and five questions appertained to the consumer. I used the questions with an opened end and the questions with a closed end. The obtained information was processed in the computer programme MS Excel and Statistica 6.0. I ascertained what new flavours would the consumers like, which flavours are the most popular, how to change the consumption of the packaged water depending on the season. After the data evaluation and data presentation I suggested the solution for the selected company. I believe that this research helps the company HBSW Inc. in the next steps and decision.

In the theoretical part of diploma thesis is elaboreted literary search relating to problems with using of various modifications of coagulation tests. The experimental part of diploma thesis is focused on comparison of three types of coagulation tests during treatment of model water with increased content of humic matter. Concretly was compared classic jar test, modified jar test and centrifugation test. As a coagulant was used ferric sulphate. The efficiency of treatment was tested under various conditions (temperature, time of fast mixing and intensity of slow mixing). Information capability of results was evalueted on the basis of absorbance by 254 nm and 387 nm, residual concentration of iron and dichromate value. Obtained results were numerically processed and they are presented in the form of tables and graphs.

The aim of this work was the evaluation and method optimalization for determination of sulfates in aqueous solutions with application on different kinds of waters. For determination of sulfates were used two different procedures, turbidimetric and volumetric. In turbidimetric procedure was use optimized conditions applicable determination of sulfates in range from 0 – 20 mg.l-1. For stabilization of the colloid was use glycerine, himself sulfates sedimentation is discharged in BaSO4 form. By volumetric methods are used titration on the dithizone like indicator while using Pb(NO3)2 like volumetric reagent. Other indicator bromsulfonazo III, whitch are used for determination of sulfates by the help of volumetric solutions Ba(ClO4)2 and BaCl2. All volumetric determinations proceeded in acidic medium. During research of interferences ions on the individual titraction was detected substantial effect Ca2+, Mg2+ and Fe3+, which was needing divide off on the exchanger resin. Ions aforementioned don't interfere turbidimetric determination of sulfates.

The thesis deals with water electrolysis focusing in particular on pulse electrolysis. The theoretical part characterizes hydrogen and its properties as well as the ways of its use and storage. It also analysis various methods of hydrogen generation. It examines in details water electrolysis and its energetic and chemical balance. There is also an evaluation of water electrolysis efficiency and its improvement followed by pulse electrolysis description. Laboratory equipment for direct current and pulsed direct current hydrogen production are suggested. Theoretical expectations are tested experimentally. Finally the thesis presents the results of measurements, compares and summarizes the data. It points out the contribution of this type of electrolysis with its effectiveness. It proposes uses of electrolysis and the subsequent research.

Isotopic investigations combined with geothermal applications represent powerful tools for the exploration of groundwater potential as a drinking or geothermal resource. This Ph.D. Thesis combines both approaches, environmental and radioactive isotopes together with temperature data in deep aquifers, in order to enrich and update the knowledge concerning the aquifer recharge processes in the Aquitaine Basin (France) and the aquifer recharge processes and geothermal potential in the Bohemian Cretaceous Basin (Czech Republic). Stable isotopes (18 O, 2 H, 13 C) combined with radioisotope data (14 C, 3 H) are used to estimate the recharge timing and climatic conditions prevailing during the infiltration from the Late Pleistocene up to modern time. The character of groundwater recharge and regime are necessary to generate relevant source data for the accurate modelling of complex groundwater systems. Three groups of groundwater recharge types can be distinguished throughout Europe - (i) continuous recharge and (ii) interrupted recharge during Last Glacial Maximum and (iii) a group corresponding to particular recharge conditions. The contrasted geographic and climate conditions at both study sites in France and the Czech Republic have entailed a great heterogeneity of the recharge conditions and...

Presented PhD theses deals with evaluation of use of algal biofilms for nutrients removal from wastewater. The integral part of research was estimation of the comprehensive benefit of the presented technology, including biomass production and phosphorus recovery. The algal biofilm was able to remove 98 % of phosphorus after 24 hours when the PO4-P concentrations in inflowing water ranged from 3 to10 mg.L-1. Different patterns of phosphorus and nitrogen removal were observed. Daily quantity of removed NO3-N ranged from 2 % to 25 % and was highly depended on solar irradiance. The studied biofilm system has a high efficiency for phosphorus removal and, therefore, has great potential for integration into wastewater treatment processes.

The aim of this thesis was to compared physical, chemical and sensory parameters of two groups Vysočina salami. First group is a control group with salt content 2 %. Second group is experimental group with a reduced content of salt 1,5 %. The salami were produced at Mendel University in Brno, where all parameters were also measured. The results showed that experimental group had higher water activity during maturing. Accordingly, other parameters as colour, texture and pH were different. Instrumental analyses showed lighter colour compared to the control group. Also salami were more tender and pH was higher. No statistical significant differences were found between groups in sensory evaluation.