The topic of work deals with the extraction and optimization of the preparation of 23-hydroxy betulin using methods of semimicrotechnology. The beginning involved choosing a suitable roll to extract a product of relative purity and advantageous quantity. During the course of the experim...

This bachelor thesis concerns with additives in food and their influence on human health. The opening chapter is dedicated to general overview, history and testing of supplementary stuff. Furthermore, the thesis also describes the dividing of the supplementary stuff and its most signifi...

This bachelor thesis examines carbohydrates in food and the methods of their determination. It describes significant representatives of carbohydrates' particular groups, focusing on their chemical structure, the occurrence and the significance in human nutrition. The bachelor thesis also explores ...

This bachelor thesis deals with the use of the nuclear energy. There is a description of the structure of the atom, specifically of its nucleus.In the next section is described radioactivity, where each of the radiation types is described in detail. A large part of this&#...

The bachelor thesis deals with basic electrochemical methods, their principles, features and application. In the theoretical part, the thesis focuses in more detail on the method of polarography. The practical part verifies the theoretical knowledge by identifying selected heavy metals by me...

The topic of the bachelor thesis is focused on the determination of the content of methanol, ethanol and 2-propanol in differently old samples of domestic distillates with the use of gas chromatography. In the theoretical part there is a short mention of gas chromatography,&#...

The aim of this Bachelor´s Thesis is to define the chasen parameters of wastewater in small wastewater treatment plant. The theoretical part contains the description and kinds of wastewater and the procedure of its cleaning. Further it gives us insight into the methods ...

The Bachelor work is focused to practic manufactory of the malt in laboratory. Describing theory used in technological practise. On this basis is created the process in laboratory. Manufactured malts are compared with the malt which is comercially available. Comparative method is based&...

This project will be resolving presence of halogenated substances in selected samples from the environment. Subjected to the tests halogenated hydrocarbons and as a sample was chosen herbicide, commonly used in local farming/agriculture. The Herbicide was extracted from watery environment an...

This thesis comprised of the theoretical and the experimental part deals with triterpenoids, especially with betulin and gamma-apoallobetulin. The thesis is focused on experiments leading to preparation of gamma-apoallobetulin from betulin at the potassium hydrogen sulfate solution, and on a use&...

This bachelor thesis is focused on the electrochemical preparation of polymeric materials. Bachelor thesis is divided into three main parts - theoretical part, practical part and data evaluation. First part is devoted to the study of scientific literature and explains the concept...

This bachelor thesis deals with the production of sugar in the Czech lands before and now, along with making some processing procedures sugar beet in laboratory. The first chapters describes composition of the sugar beet, pests, deseases and fertilizing. Next chapters deals with th...

The work on the chosen topic includes systematically organized information. These are intentionally divided into the theoretical area and the practical sphere with respect to their own experiment. The knowledge obtained in the form of the output data of the curves of the individual...

This thesis deals with periodic system of elements. Attention is focused on a sequence of historical discoveries, thanks to which the system has evolved over several years. It is described, what scientists have contributed to the development of the periodic system, their hypotheses ...

This bachelor thesis is focused on the most famous person in chemistry in 19th century. Bachelor thesis is divided into two main parts. The first part deals the general development events in 19th century. The second part is dedicated to chemical branches and their the mos...

The barchelor thesis theoretically summarizes information about the elements of group 15 of the periodic table of elements and their important compounds. For each element there are mentioned their physical and chemical properties, their history of discovery, development, production and use i...

This thesis is concerned with the selected drinking water parameters.The goal was to get acquainted with possibilities of thein titration assessments. Appropriate methods for selected analytes were choosen from alternatives and the work instructions were prepared for them. These work instructions...

In this thesis are described features and applications of betulinic acid and some laboratory methods like distillation, extraction and thin-layer chromatografy, also described construction of ozoniser. In practical part is a description of simple transformation of betulinic acid, its ozonolysis a...

This bachelor´s thesis is focused on milk and calcium contained there. It deals with composition of the milk, its treatment and the presence of calcium which is the main topic of a practical part. It compares milks of various mammals which differ in their ingredients acco...

Nowadays food products containing roughage are freely available for purchase almost anywhere. Roughage has a beneficial effect on the physiology of the human body. Individual types of roughage have common characteristics and ability to influence food digestion in the human organism. Roughage...