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Showing 16 to 30 of 67 results Save | Export
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Alneyadi, Aysha; Shah, Iltaf; Ashraf, Syed Salman – Biochemistry and Molecular Biology Education, 2019
Active-learning strategies such as undergraduate research courses and course-based undergraduate research experiences (CUREs), which engage students in the practical experiments, have been reported as efficient ways for effective teaching and training of graduating students. Recently, many practical examples have been published in various fields…
Descriptors: Research Projects, Undergraduate Students, Active Learning, Student Research
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Purcell, Sean C.; Pande, Prithvi; Lin, Yingxin; Rivera, Ernesto J.; Paw U, Latisha; Smallwood, Luisa M.; Kerstiens, Geri A.; Armstrong, Laura B.; Robak, MaryAnn T.; Baranger, Anne M.; Douskey, Michelle C. – Journal of Chemical Education, 2016
In this undergraduate analytical chemistry experiment, students quantitatively assess the antibacterial activity of essential oils found in thyme leaves ("Thymus vulgaris") in an authentic, research-like environment. This multi-week experiment aims to instill green chemistry principles as intrinsic to chemical problem solving. Students…
Descriptors: Undergraduate Students, College Science, Chemistry, Science Experiments
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Xiong, Qing; Luo, Mingliang; Bao, Xiaoming; Deng, Yurong; Qin, Song; Pu, Xuemei – Journal of Chemical Education, 2018
This experiment is dedicated to second-year and above undergraduates who are in their experimental session of the analytical chemistry course. Grouped students are required to use a TiO[subscript 2] photocatalytic oxidation process to treat the methanol-containing wastewater that resulted from their previous HPLC experiments. Students learn to…
Descriptors: Chemistry, College Science, Science Instruction, Science Experiments
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He, Ping; Colon, Luis A.; Aga, Diana S. – Journal of Chemical Education, 2016
A two-part laboratory experiment was designed for upper-level analytical chemistry students to provide hands-on experience in the use of high performance liquid chromatography (HPLC) for separation and inductively coupled plasma mass spectrometry (ICP-MS) for detection. In the first part of the experiment, the students analyze total arsenic in…
Descriptors: Science Instruction, Science Experiments, Laboratory Experiments, Science Laboratories
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Higman, Carolyn S.; Situ, Henry; Blacklin, Peter; Hein, Jason E. – Journal of Chemical Education, 2017
Advances in 3D printing technology over the past decade have led to its expansion into all subfields of science, including chemistry. This technology provides useful teaching tools that facilitate communication of difficult chemical concepts to students and researchers. Presented here is the use of 3D printing technology to create tangible models…
Descriptors: Undergraduate Study, College Science, Chemistry, Hands on Science
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Chen, Xiao-Yang; Sun, Li-Sen; Gao, Xiang; Sun, Xing-Wen – Journal of Chemical Education, 2015
An asymmetric synthetic experiment that encompasses both diastereoselectivity and enantioselectivity is described. In this experiment, Zn-mediated allylation of an ("R")-"N"-"tert"-butanesulfinyl imine is first performed to obtain either diastereomer using two different solvent systems, followed by oxidation of the…
Descriptors: Science Experiments, Science Instruction, Teaching Methods, Science Laboratories
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Short, Michael; Short, Anne; Vankempen, Rachel; Seymour, Michael; Burnatowska-Hledin, Maria – Biochemistry and Molecular Biology Education, 2010
Practical instruction of proteomics concepts was provided using high-performance liquid chromatography coupled with a mass selective detection system (HPLC-MS) for the analysis of simulated protein digests. The samples were prepared from selected dipeptides in order to facilitate the mass spectral identification. As part of the prelaboratory…
Descriptors: Biochemistry, Spectroscopy, Teaching Methods, Science Instruction
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Blankespoor, Ronald L.; Hogendoorn, Stephanie; Pearson, Andrea – Journal of Chemical Education, 2007
The reactivity and orientation effects of a substituent are analyzed by using HPLC to determine the competitive nitration of the benzene-toluene and benzene-fluorobenzene mixtures. The results have shown that HPLC is an excellent instrumental method to use in analyzing these mixtures.
Descriptors: Organic Chemistry, College Science, Science Instruction, Hands on Science
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Martí-Andre´s, P.; Escuder-Gilabert, L.; Martín-Biosca, Y.; Sagrado, S.; Medina-Herna´ndez, M.J. – Journal of Chemical Education, 2015
Energy drinks, as familiar consumer products, have been widely used in laboratory courses to help promote student interest, as well as to connect lecture concepts with laboratory work. Energy drinks contain B vitamins: pyridoxine (vitamin B6) and riboflavin (vitamin B2) of which amounts are high enough to be of concern. In this work, a fast and…
Descriptors: Science Instruction, Science Experiments, Science Laboratories, Laboratory Experiments
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Halepas, Steven; Hamchand, Randy; Lindeyer, Samuel E. D.; Bru¨ckner, Christian – Journal of Chemical Education, 2017
A laboratory experiment is described that extracts the tetrapyrrolic teal-colored biliverdin IXa, as its dimethyl ester, from commercially available emu eggshells. The extraction of ~10 mg samples of biliverdin is simple and requires two 3 h lab periods: A two-step acid digestion and liquid-liquid extraction, followed by short silica gel flash…
Descriptors: Animals, Science Instruction, Laboratory Experiments, Chemistry
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O'Shea, Stephen K.; Von Riesen, Daniel D.; Rossi, Lauren L. – Journal of Chemical Education, 2012
Natural product isolation and analysis provide an opportunity to present a variety of experimental techniques to undergraduate students in introductory organic chemistry. Eugenol, anethole, and carvone were extracted from six common spices using steam-distillation and diethyl ether as the extraction solvent. Students assessed the purity of their…
Descriptors: Organic Chemistry, Undergraduate Study, College Science, Spectroscopy
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Mahler, Graciela; Davyt, Danilo; Gordon, Sandra; Incerti, Marcelo; Nunez, Ivana; Pezaroglo, Horacio; Scarone, Laura; Serra, Gloria; Silvera, Mauricio; Manta, Eduardo – Journal of Chemical Education, 2008
In this laboratory activity, students are introduced to the synthesis of an albendazole metabolite obtained by a sulfide oxidation reaction. Albendazole as well as its metabolite, albendazole sulfoxide, are used as anthelmintic drugs. The oxidation reagent is H[subscript 2]O[subscript 2] in acetic acid. The reaction is environmental friendly,…
Descriptors: Science Activities, Chemistry, Science Laboratories, Science Experiments
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Freeman, Jessica D.; Niemeyer, Emily D. – Journal of Chemical Education, 2008
We have developed a laboratory experiment that uses high performance liquid chromatography (HPLC) to quantify flavonoid levels in a variety of commercial teas. Specifically, this experiment analyzes a group of flavonoids known as catechins, plant-derived polyphenolic compounds commonly found in many foods and beverages, including green and black…
Descriptors: Chemistry, Laboratory Experiments, Food, Nutrition
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Sjursnes, Birte Johanne; Kvittingen, Lise; Schmid, Rudolf – Journal of Chemical Education, 2015
Introductory experiments of chromatography are often conducted by separating colored samples, such as inks, dyes, and plant extracts, using filter paper, chalk, or thin layer chromatography (TLC) plates with various solvent systems. Many simple experiments have been reported. The relationship between normal chromatography and reversed-phase…
Descriptors: Science Experiments, Undergraduate Students, Introductory Courses, Demonstrations (Educational)
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Gandia-Herrero, Fernando; Simon-Carrillo, Ana; Escribano, Josefa; Garcia-Carmona, Francisco – Journal of Chemical Education, 2012
The food industry uses different additives to give foods and beverages the appearance expected by the consumer. Among them, pigments of natural origin are receiving increasing attention due to safety concerns about traditional colorants and the relevance of a healthy diet. This experiment describes the quantitative determination of the…
Descriptors: Chemistry, Laboratory Experiments, College Science, Undergraduate Study
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