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Phosphate in Soils: An Undergraduate Exploration of Soil Texture, Chemistry, and Amendment
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Crisler, Glenn B., II.; Perera, Viveka; Hernandez, Cintly Guzman; Orr, Andre; Davis, Roger; Moore, Jessie; Smith, James; Varco, Jac; Schauwecker, Tim; Brown, Ashli; Mlsna, Todd; Mlsna, Deb – Journal of Chemical Education, 2020
This paper presents an experimental lab designed for undergraduate students which focuses on soil science and chemistry. Students perform a series of tests to classify soil's phosphate retaining characteristics, texture, pH, organic matter content, and permeability with the addition of a novel soil amendment, Al Mg biochar. This lab has minimal…
Descriptors: Science Instruction, Science Laboratories, Science Experiments, Laboratory Experiments
Hands-On Electrospray Ionization Mass Spectrometry for Undergraduate Biochemistry Students: Peptide Identification by Ladder Sequencing
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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
Determination of Xylitol in Sugar-Free Gum by GC-MS with Direct Aqueous Injection: A Laboratory Experiment for Chemistry Students
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Rajapaksha, Suranga M.; Samarasekara, Dulani; Brown, John Charles; Howard, Leslie; Gerken, Katherine; Archer, Todd; Lathan, Patty; Mlsna, Todd; Mlsna, Deb – Journal of Chemical Education, 2018
Proficiency with instrumental analysis via GC-MS is an important skill for chemistry students. The application of analytical techniques and fundamental theoretical principles to real-world problems can be valuable learning exercises for undergraduates which can also improve their analytical thinking skills. Xylitol is generally considered safe for…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Science Experiments
Analysis and Identification of Major Organic Acids in Wine and Fruit Juices by Paper Chromatography
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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
Undergraduate Laboratory Experiment Modules for Probing Gold Nanoparticle Interfacial Phenomena
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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
Salicylic Acid and 4-Nitroaniline Removal from Water Using Magnetic Biochar: An Environmental and Analytical Experiment for the Undergraduate Laboratory
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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