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Simeen Sattar – Journal of Chemical Education, 2024
Lakes are artists' pigments made from colorants bound to an inert substrate, usually hydrated aluminum oxide. Before the late 19th century, lakes were made from natural pigments extracted from plants and insects, extracted either directly from the dyestuff or indirectly from waste materials generated in the manufacture of dyed textiles. The first…
Descriptors: Color, Science Experiments, Laboratory Experiments, Science Education
Hannah Kessler; Christopher M. Russo; Vincent Fumo; Matthew C. O'Reilly – Journal of Chemical Education, 2022
Spectroscopic characterization of molecules is typically reinforced in the organic chemistry teaching laboratory via the analysis of reaction products by NMR and IR, and initial coverage of these topics can include experiments involving the identification of unknown compounds. To combine the unknown identification component with common laboratory…
Descriptors: Organic Chemistry, Laboratory Experiments, Science Instruction, Pharmaceutical Education
Antonio Rosales Marti´nez; Ignacio Rodri´guez-Garci´a; Josefa L. Lo´pez-Marti´nez – Journal of Chemical Education, 2022
Green chemistry is finding its place as one of the most essential study topics in the curriculum of future chemists and chemical engineers. Experiments that meet green chemistry principles contribute to make the laboratory a safer working place, generate less waste, and allow students to increase their knowledge in new environmentally friendly…
Descriptors: Chemistry, Laboratory Experiments, Laboratory Procedures, Teaching Methods
Chengxuan Guo; Nicole Wendel; Ally Lee; Shonda Monette; Brian Morrison; Dominic Frisbie; Earlene Erbe; Rene´e S. Cole; Max Lei Geng – Journal of Chemical Education, 2024
The pharmaceutical and medicine manufacturing industry has become the largest industrial sector for the employment of chemists, indicating a need for experiments with a pharmaceutical sciences context in the undergraduate chemistry curriculum. In the pharmaceutical industry, testing drug dissolution is a key analytical task for solid oral dosage…
Descriptors: Undergraduate Students, Chemistry, Science Instruction, Laboratory Experiments
Thaveesangsakulthai, Isaya; Kulsing, Chadin – Journal of Chemical Education, 2021
Optimization of experimental conditions in chromatography is recognized as a wear-and-tear process involving hundreds of experiments in order to maximize the number of separated compounds for each sample. The critical thinking skills and practices entailed cannot be achieved with students in a conventional lecture class. This report provides a…
Descriptors: Spreadsheets, Simulation, Biochemistry, Laboratory Procedures
Rosalynn Quin~ones; Anette Casiano-Negroni; Haley Pijor; Sara Moreno; Karla Suarez; Tamara D. Westfall; Carrie Sullins; Sarah Ivey; Jose´ A. Buxo´ – Journal of Chemical Education, 2022
Recently, topical products advertising cannabinoid ingredients have gained popularity. Consumers are seeing an increase of commercial products containing ingredients from hemp oil to cannabidiol (CBD) due to health benefit claims. Cosmetic products containing cannabinoids are currently not regulated at the federal level. A laboratory experiment…
Descriptors: Marijuana, Cosmetology, Organic Chemistry, Hands on Science
Varela, Carla L.; Cabral, Ana M. T. D. P. V.; Barbosa, Isabel R.; Costa, Saul C.; Silva, Elisiário J. T.; Roleira, Fernanda M. F. – Journal of Chemical Education, 2020
Amides are usually prepared using amines and acyl halides, which often implies a two-step procedure. Alternatively, coupling reagents can be used in a single-step reaction with good yields, which seems to be suitable for organic chemistry laboratory classes. This work was designed to synthesize "N"-hexylcinnamamide through a one-step…
Descriptors: Undergraduate Students, College Science, Science Experiments, Laboratory Experiments
Strachan, Jyah; Barnett, Christopher; Maschmeyer, Thomas; Masters, Anthony F.; Motion, Alice; Yuen, Alexander K. L. – Journal of Chemical Education, 2020
We report a research-enhanced undergraduate laboratory practical in which students synthesize and characterize color-controllable, stable silver nanoparticles for use in a simple catalytic reaction analyzed by UV-vis spectroscopy. The practical has been prepared for students using electronic laboratory notebooks, enables collaborative data…
Descriptors: Undergraduate Students, Science Experiments, Laboratory Experiments, Chemistry
Semimicro/Microscale Adaptation of the Cobalt Chloride/Sodium Borohydride Reduction of Methyl Oleate
McKee, James R.; Zanger, Murray; Chiariello, Carmine; McKee, James A.; Dorfner, Walter; Fasella, Elisabetta; Koo, Yumee – Journal of Chemical Education, 2019
The reduction of alkenes usually involves a hydrogen source and a catalyst. This process is both expensive and not well-suited for a large teaching laboratory. This paper presents an alternative procedure using a mixture of cobalt chloride and sodium borohydride to achieve the reduction of methyl oleate to methyl stearate. This procedure is safe,…
Descriptors: Laboratory Procedures, Science Instruction, Chemistry, Spectroscopy
Qiu-ting Huang; Yi-dan Zuo; Zhu Zhu; Liu Yang; Zhong-qun Tian; Guo-kun Liu – Journal of Chemical Education, 2024
Nitrate is a crucial parameter for assessing water quality, owing to its dual function in ecological systems. These functions can be beneficial or detrimental depending on whether nitrate concentrations are low or high, respectively. The ultraviolet spectrophotometric method (standard as 4500-NO[subscript 3]--B) is a classic method for determining…
Descriptors: Organic Chemistry, Scientific Concepts, Laboratory Experiments, Laboratory Procedures
Gehman, Courtney A.; Hantz, Eric R.; Hamann, Christian S. – Journal of Chemical Education, 2021
[superscript 1]H NMR spectroscopy is a molecular characterization technique that is ubiquitously used in research and teaching laboratories alike. Strategic deuteration of molecules is a commonly employed technique in the deconvolution of [superscript 1]H NMR signals. Here this approach is applied in a second-year chemistry course in which…
Descriptors: Undergraduate Students, College Science, Chemistry, Science Experiments
Marsiglia, William M.; Qamra, Rohini; Jackson, Kimberly M.; Traaseth, Nathaniel J. – Journal of Chemical Education, 2020
The design of undergraduate laboratory courses that provide meaningful research-based experiences enhances undergraduate curricula and prepares future graduate students for research careers. In this article, a course-based undergraduate research experience (CURE) laboratory module was designed for upper-division undergraduate biochemistry and…
Descriptors: Biochemistry, Science Instruction, College Science, Student Research
Mannino, Michael P.; Dunteman, Ariel P.; Demchenko, Alexei V. – Journal of Chemical Education, 2019
A robust laboratory protocol for the three-step synthesis of "p"-tolyl 2,3,4,6-tetra-"O"-benzoyl-1-thio-[beta]-d-glucopyranoside from commercial glucose pentaacetate is reported. The previously reported procedures have been modified to accommodate laboratories and students without proper training or equipment needed to conduct…
Descriptors: Organic Chemistry, Science Laboratories, Laboratory Experiments, Laboratory Procedures
Esvan, Yannick J.; Zeinyeh, Wael – Journal of Chemical Education, 2020
The Fourier transformation (FT) is a mathematical process frequently encountered by chemistry students. However, it remains an automated background process perceived by many students as difficult to understand. In this paper we present a simple open-source web application, which can help students to understand the basics of the FT applied to…
Descriptors: Chemistry, Spectroscopy, Laboratory Procedures, Laboratory Experiments
Overly, Kenneth R. – Journal of Chemical Education, 2019
An experiment for the undergraduate organic chemistry laboratory involving a method for the isolation of eugenol from cloves has been developed. The experiment employs microwave-assisted extraction (MAE) of the essential oil from whole cloves using aqueous ethanol and the subsequent isolation of eugenol by acid-base extraction. The MAE allows for…
Descriptors: Undergraduate Students, College Science, Organic Chemistry, Science Experiments