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Perera, Viveka; Acharya, Baku; Patrick, Amanda L.; Mlsna, Deb – Journal of Chemical Education, 2020
Mass spectrometers are ever-increasingly powerful, user-friendly, and affordable. Thus, the addition of mass spectrometry experiments into the undergraduate laboratory curriculum is now both feasible and an effective tool to introduce students to relevant instrumentation. Here an experiment demonstrating the use of a high-resolution electrospray…
Descriptors: Undergraduate Students, Biochemistry, Majors (Students), Hands on Science
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Samarasekara, Dulani; Hill, Courtney; Mlsna, Deb – Journal of Chemical Education, 2018
A simple and inexpensive paper chromatography experiment that separates and identifies major organic acids in wine and fruit juices has been developed for introductory organic undergraduate students to teach the basics of chromatography. This experiment reinforces several concepts for students such as compound separation via extraction and…
Descriptors: Organic Chemistry, Science Instruction, Identification, Science Experiments
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Karunanayake, Akila G.; Gunatilake, Sameera R.; Ameer, Fathima S.; Gadogbe, Manuel; Smith, Laura; Mlsna, Deb; Zhang, Dongmao – Journal of Chemical Education, 2015
Three gold-nanoparticle (AuNP) undergraduate experiment modules that are focused on nanoparticles interfacial phenomena have been developed. Modules 1 and 2 explore the synthesis and characterization of AuNPs of different sizes but with the same total gold mass. These experiments enable students to determine how particle size affects the AuNP…
Descriptors: Science Experiments, Laboratory Experiments, Undergraduate Study, Science Laboratories
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Karunanayake, Akila G.; Dewage, Narada Bombuwala; Todd, Olivia Adele; Essandoh, Matthew; Anderson, Renel; Mlsna, Todd; Mlsna, Deb – Journal of Chemical Education, 2016
Adsorption studies of salicylic acid (SA) and 4-nitroaniline (4NA) from aqueous solutions were performed with magnetic biochar (MBC) in order to train students in analytical techniques such as standard calibration curves, UV-vis spectrophotometry, and chemical separations within the context of wastewater purification. Analysis of samples purified…
Descriptors: Undergraduate Students, Science Education, Chemistry, Scientific Concepts