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Experimentalteaching of organic chemistry oriented on education
Karlínová, Markéta ; Hybelbauerová, Simona (advisor) ; Klímová, Helena (referee)
Experiments are indisputably the most popular part of chemistry lessons for students. When an experiment is performed with the material commonly known like foodstuff then interest of students increases. Presented bachelor thesis shows experiments with chocolate lentils of two producers, Nestle and Mars, Inc. Interest is focused on colorants - a topic of organic chemistry which is directly mentioned in basic curricular documents RVP G. The experiments demonstrate influence of pH environment on sensitivity of artificial colorings and natural food dyes contained in chocolate lentils. By using these food colorings retention factor and its dependence on TLC (thin layer chromatography) conditions is explained. Absorbance spectra of colorants are included. The thesis presents new possibilities of scientific approach about lecture of colorants. The aim of presented bachelor thesis is focused on importance of monitoring the composition in food products. Producers might change the composition of their products and that's why described experiments can't be followed easily. Certain problem was in case of Nestle producer who has changed food colorings in these chocolate candies. Although original food colorings had been natural food dyes (mix of carotenoids, anthocyanins), for the majority of people is more...
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Molecular models in teaching organic chemistry at the grammar school
Marek, Milan ; Beneš, Pavel (referee) ; Hlavatý, Josef (referee)
TITLE: Molecular models in teaching organic chemistry at the Grammar School AUTHOR: Milan Marek DEPARTMENT: Department of Chemistry and Chemical Education ABSTRACT: The thesis is focused on the use of molecular models in teaching organic chemistry at the Grammar School. Models are used for a presentation of the structure of organic compounds and especially their chemical characteristics. The research includes the construction of models (based on quantum-chemical methods), selected organic compounds from the category hydrocarbons, halogenated hydrocarbon and oxytgented derivates of hydrocarbons and other types of compounds. Along with the relevant models, the tasks focusing on the structure and reactivity of compounds are processed. The research examined the influence of the use of models for a success solving task of students from 3rd year of Grammar School. Tasks are related to the distribution of electron density in the molecule, delocalization of electrons substitution effect of typology reaction etc. 223 students participated in this research. The research results have shown the increase of the success of solving the tasks of those students who could use molecular models, in some cases the increase of 26% has been shown. The positive effect of the models for solving of problems is individual and it...
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Textbook of organic chemistry for secondary education.
Hurný, David ; Hybelbauerová, Simona (advisor) ; Klímová, Helena (referee) ; Smrček, Stanislav (referee)
This thesis deals with creation of new textbook for high schools and gymnasium students. The main focus of this work is mainly on general prinicples and laws in chemistry. Great attention is dediacted to atom structure,chemical bond, electronic effects, resonance theory, induction and mesomeric effect. The core content based on RVP is supplemented by parts for work with talented students. Every chapter is supplemented with number of excercises which should be used to complement the subject matter. Powered by TCPDF (www.tcpdf.org)
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Experimentalteaching of organic chemistry oriented on education
Karlínová, Markéta ; Hybelbauerová, Simona (advisor) ; Klímová, Helena (referee)
Experiments are indisputably the most popular part of chemistry lessons for students. When an experiment is performed with the material commonly known like foodstuff then interest of students increases. Presented bachelor thesis shows experiments with chocolate lentils of two producers, Nestle and Mars, Inc. Interest is focused on colorants - a topic of organic chemistry which is directly mentioned in basic curricular documents RVP G. The experiments demonstrate influence of pH environment on sensitivity of artificial colorings and natural food dyes contained in chocolate lentils. By using these food colorings retention factor and its dependence on TLC (thin layer chromatography) conditions is explained. Absorbance spectra of colorants are included. The thesis presents new possibilities of scientific approach about lecture of colorants. The aim of presented bachelor thesis is focused on importance of monitoring the composition in food products. Producers might change the composition of their products and that's why described experiments can't be followed easily. Certain problem was in case of Nestle producer who has changed food colorings in these chocolate candies. Although original food colorings had been natural food dyes (mix of carotenoids, anthocyanins), for the majority of people is more...
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Molecular models in teaching organic chemistry at the grammar school
Marek, Milan ; Beneš, Pavel (referee) ; Hlavatý, Josef (referee)
TITLE: Molecular models in teaching organic chemistry at the Grammar School AUTHOR: Milan Marek DEPARTMENT: Department of Chemistry and Chemical Education ABSTRACT: The thesis is focused on the use of molecular models in teaching organic chemistry at the Grammar School. Models are used for a presentation of the structure of organic compounds and especially their chemical characteristics. The research includes the construction of models (based on quantum-chemical methods), selected organic compounds from the category hydrocarbons, halogenated hydrocarbon and oxytgented derivates of hydrocarbons and other types of compounds. Along with the relevant models, the tasks focusing on the structure and reactivity of compounds are processed. The research examined the influence of the use of models for a success solving task of students from 3rd year of Grammar School. Tasks are related to the distribution of electron density in the molecule, delocalization of electrons substitution effect of typology reaction etc. 223 students participated in this research. The research results have shown the increase of the success of solving the tasks of those students who could use molecular models, in some cases the increase of 26% has been shown. The positive effect of the models for solving of problems is individual and it...
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