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Science experiments during free-time activities of school-aged children
Moulisová, Marie ; Čapek Adamec, Martin (advisor) ; Kropáčková, Jana (referee)
This bachelor thesis deals with the ways in which science (chemistry, physics, biology) and other related disciplines can be used in primary school children's leisure time activities. It presents a number of practical proposals as for how to make these subjects more accessible in an attractive way. The theoretical part briefly describes the individual subjects in question, a range of leisure-time facilities suitable for the intended activities, and specifies the characteristics of preschool children. The practical part brings a numer of possible experiments in the given subjects, together with their description and practical implementation. The proposals for experiments and activities are based on everyday life. The aim of this thesis is to make these often not fully understood everyday life situation accessible to children in an interesting and playful way. The final reflection is aimed at the assessment of the suitability of the individual proposals, and their possible pitfalls and improvements.
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Textile dyeing by vegetal dyes
Rychlovská, Kristýna ; Hrdličková Kučková, Štěpánka (advisor) ; Čapek Adamec, Martin (referee)
1 ABSTRACT: Theoretical part of this bachelor thesis deals briefly with colour perception and history of dyeing with natural dyes. Also it devotes to dyer's plants, their use and colouring agents. Then the thesis deals with classification of natural dyes, their structure, use and organisms that contain these dyes. The accent is put on social important dyes and mainly on dyes that were analysed in the Experimental part. In the theoretical part of this thesis the principle of the used mass spectrometric method is explained. In the Experimental part the dyeing of small clothes by the selected plants is described. The the textiles were analysed by LDI MS (Laser Desorption/Ionisation - Time Of Flight Mass Spectrometry). The goal of this thesis was by using of the method of mass spectrometry determine the known dyestuffs in black elder (Sambucus nigra), blueberry (Vaccinium myrtillus), onion (Allium cepa), red currant (Ribes rubrum), walnut (Juglans regia) and St John's wort (Hypericum perforatum). In the supplement part the photographed dyed textiles are presented. KEY WORDS: dyer's plants, vegetal dyes, mass spectrometry
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Comparation of gasolines by gas chromatography
Švambergová, Šárka ; Kučková, Štěpánka (advisor) ; Čapek Adamec, Martin (referee)
Gasoline is volatile substance that is composed of many hydrocarbons and other ingredients called additives. The method of gas chromatography is most commonly used for the analysis of gasoline. It is suitable for separation of hydrocarbons contained in gasoline and also for their comparison. The task of this bachelor thesis was to compare different types of gasoline based on the separation of individual hydrocarbons by gas chromatography with flame ionization detector (GC-FID). At first, the knowledge about the method of gas chromatography and the composition and properties of gasoline was necessary to achieve. Secondly, the determination of experimental conditions (temperature program) for proper separation of hydrocarbons and comparison of selected gasoline were obtained.
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Tools for Creating Organic Compound Formulas and Possibilities of their Use in Chemistry Education
Stárková, Dagmar ; Rusek, Martin (advisor) ; Čapek Adamec, Martin (referee)
The thesis explores suitability of software for drawing formulas in organic chemistry and its preparation in elementary and high schools. It uses both quantitative and qualitative research methods and notes that this kind of software could be a practical teaching aid if it was properly placed in the educational process. The thesis represents essential functions of these programs with respect to their technical demands. It also examines the current status of the use of software for drawing formulas from the teachers perspective in primary and secondary education. Presented is an overview of the functions of software for drawing formulas with regard to their use in organic chemistry. The findings of this research indicate that organic chemistry is the topic where the editors are most commonly used. It was also found that respondents use software for drawing formulas very rarely, especially to prepare for teaching, less in the school. In today's digital age, this condition cannnot be accepted. It is necessary to examine various options for the use of information and communication technologies and to promote their effective integration into chemistry education as many researches have shown.
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Optimization of photochemical hydrogen peroxide preparation
Mesnerová, Iveta ; Čapek Adamec, Martin (advisor) ; Kotoučová, Hana (referee)
The thesis topic: Optimization of photochemical preparation of hydrogen peroxide for laboratory of inorganic chemistry Abstract: This Bachelor thesis deals with compound of hydrogen and oxygen, hydrogen peroxide. The theoretical part of thesis deals with basic physical and chemical characteristic of hydrogen peroxide, its preparation and last but not the least its production. The practical part of thesis deals with two main laboratoř preparations of hydrogen peroxide. First, from barium peroxide sequential reaction with hydrochloric acid, sulphuric, carbonate leader. Second, from anthraquinone dissolved in toluene by photochemical reduction isopropylalcohol and following oxidation mixture of air oxygen. The aim of thesis is implementation of those two methods, finding out the pros and cons and their comparison mainly from the point of preparation effectivness and possibility of use in laboratories of inorganic chemistry. Keywords: hydrogen peroxide, anthraquinone, photochemical reduction, toluene, isopropylalcohol
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