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Direct linkBaldwin, Bruce W.; Kuntzleman, Thomas S. – Journal of Chemical Education, 2018
The separation of chamazulene from hydrophilic contaminants present in blue tansy oil provides a visually engaging example of two common techniques: extraction and thin-layer chromatography (TLC). This application uses liquid CO[subscript 2] as a lipophilic solvent to pull a brilliant blue hydrocarbon molecule, chamazulene, out of or through a…
Descriptors: Science Instruction, Science Laboratories, College Science, Organic Chemistry
Howder, Collin R.; Groen, Kyle D.; Kuntzleman, Thomas S. – Journal of Chemical Education, 2010
A hands-on activity and demonstration, both applicable to the 2010 National Chemistry Week theme of Behind the Scenes with Chemistry, are presented. In the activity, students compare and contrast the properties of heat conductors and heat insulators. During the demonstration, students learn that water absorbed by a superabsorbent polymer can…
Descriptors: Chemistry, Hands on Science, Science Activities, Demonstrations (Educational)
