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Mariela Analía Torres; Alejandra Leonor Valdez; Carolina de Lourdes Olea; María Fernanda Figueroa; Carlos Gabriel Nieto-Peñalver – Biochemistry and Molecular Biology Education, 2024
After a time away from the classrooms and laboratories due to the global pandemic, the return to teaching activities during the semester represented a challenge to both teachers and students. Our particular situation in a Microbial Physiology course was the necessity of imparting in shorter time, laboratory practices that usually take longer. This…
Descriptors: Science Instruction, Science Laboratories, Physiology, Microbiology
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Patricia Prodan; Matteo Neffat; Renato Bonomi – Journal of Chemical Education, 2024
The activity proposed in this study aims to investigate the equilibrium between the liquid and vapor phases in a mixture of water and acetic acid, both of which are volatile substances. High school students can easily determine the composition of the liquid phase and its corresponding vapor phase at equilibrium using a simple and conceptually…
Descriptors: Chemistry, Science Instruction, Learning Activities, High School Students
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Daniele Crisafulli; Giulia Savoca; Francesca Mancuso; Martina Mazzaferro; Marco Milone; Ilenia Pisagatti; Anna Notti; Melchiorre F. Parisi; Giuseppe Gattuso – Journal of Chemical Education, 2024
In this two-session experiment for an organic chemistry lab, students prepare a macrocyclic host compound--namely, a pillar[5]arene--by means of a templated 1,4-dimethoxybenzene/formaldehyde cyclo-oligomerization (session 1), and then, they explore its molecular recognition properties toward the 1,8-diaminooctane guest with the aid of [superscript…
Descriptors: Scientific Concepts, Organic Chemistry, Science Experiments, Laboratory Experiments
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Mahaveer Genwa; Jyoti Singh; Alka Rani; Kushagra Yadav; Chetna Angrish – Journal of Chemical Education, 2024
Photochemical reactions are initiated by the absorption of light, triggering the chemical reactions and resulting in the formation of products. These reactions are generally performed using a freely available renewable source of energy-solar energy. Solar simulators mimic both the ultraviolet and visible regions of sunlight and hence can serve as…
Descriptors: Chemistry, Science Instruction, Undergraduate Study, Science Laboratories
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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
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Y. Justin Lim; Brandon Wong; Katie Macfee; Alexa Cueva; E. Aaron Martinez; Cameron Paxton; Robin Barnes; Eric Kleinsasser; Travis J. Williams – Journal of Chemical Education, 2024
Most students enter college without any exposure to polymer science, which leads to the poor understanding and slow implementation of plastic recycling programs in the United States. To address the knowledge gap in chemical recycling, we introduce a 2-part laboratory experiment that was conducted in multiple high schools and public outreach events…
Descriptors: Secondary School Science, Science Experiments, Chemistry, Recycling
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Si-Ke Chen; Xiao-Jie Ju; Jie Wei; Wei Wang; Liang-Yin Chu – Journal of Chemical Education, 2023
Previous educational articles on microfluidic technology mainly focused on continuous microfluidics, so we set up an undergraduate laboratory experiment to introduce droplet microfluidics to students. Students can understand the concept of microfluidic channels and the principles of droplet microfluidics, prepare polydimethylsiloxane (PDMS)…
Descriptors: Chemistry, Scientific Concepts, Science Experiments, Science Materials
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Adrian R. Hilts; Jason Cooke – Journal of Chemical Education, 2023
The addition of a small excess of triethyl orthoformate to an alcoholic mixture of NiCl[subscript 2]·6H[subscript 2]O and triphenylphosphine (PPh[subscript 3]) results in an increase in the typical isolated yield of [NiCl[subscript 2](PPh[subscript 3])[subscript 2]] from below 50% to over 85%. The impact of water when present in the reaction…
Descriptors: College Science, Chemistry, Undergraduate Study, Scientific Concepts
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Diederick Maes; Kevin Bevernaege; Kamil Unal; Elias Denijs; Johan M. Winne – Journal of Chemical Education, 2024
An undergraduate laboratory experiment has been developed for the synthesis of a reactive cross-linker that is useful in various highly visual demonstrations of organic reactivity, click chemistry, and biobased polymer synthesis. A triazolinedione-based cross-linker, which is known as a useful reagent for click chemistry, can be obtained from…
Descriptors: Organic Chemistry, Laboratory Experiments, Undergraduate Study, Science Education
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Palacios Gómez, Jesús; Villagómez, Roque André Eleazar Arroyo – Physics Teacher, 2023
Here, a relatively simple laboratory experiment of a physical pendulum, suitable for students of science and engineering in the first courses of university physics, is presented to illustrate its dynamic behavior and to determine its inertia moment. To this end, a long wooden rod of length L = 99.8 cm and cross-section radius R = 1.73 cm was used…
Descriptors: Physics, Science Instruction, Science Laboratories, Motion
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Michael J. Jenkins; Miranda A. Phillips; Zi-Ling Xue – Journal of Chemical Education, 2023
This experiment demonstrates that copper(II) chloride dihydrate (CuCl[subscript 2]·2H[subscript 2]O) in different solvents (acetone, isopropyl alcohol, or water) displays divergent colors and visible-near IR spectra. Both the reactions of these solutions with 2 equiv of sodium hydroxide (NaOH) and the direct solid-state reaction of CuCl[subscript…
Descriptors: Science Experiments, Laboratory Experiments, Scientific Concepts, College Science
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Siyu Zhang; Yipin Zhu; Xiang Li; Shengjie Chen; Yu Chen; Hui He; Bo Peng; Yan Zhang – Journal of Chemical Education, 2023
A one-pot multicomponent synthesis of unsymmetrical indole-substituted methane derivative based on two consecutive reactions of p-methylbenzaldehyde with N-methylindole and 5,5-dimethyl-1,3-cyclohexanedione is described as an experiment that was carried out by second-year undergraduate chemistry students individually in a laboratory classroom. The…
Descriptors: Scientific Concepts, Organic Chemistry, Synthesis, Science Experiments
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Anindita Paul; Anirban Dutta; Aditi Kundu; Supradip Saha – Journal of Chemical Education, 2023
A procedure to purify anthocyanin, a natural pigment, following a green approach by using macroporous resin and its encapsulation for the maintenance of its stability is described. This laboratory experiment, which describes the benefits of using resin for the purification, is a learning tool for students working in the field on nutraceuticals.…
Descriptors: Science Instruction, Science Experiments, Science Laboratories, Laboratory Experiments
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Junxi Zou; Xiaoyu Wang; Xuan Liu; Yuan Zheng; Wei Shao; Qing-Wei Zhang; Pingping Zhu; Lingling Li – Journal of Chemical Education, 2024
The crystalline sponge method allows for direct and precise molecular structure determination of liquid and gaseous targets and thus has been recognized as a revolutionary breakthrough in crystallography. To expose undergraduates to this cutting-edge technique, we have developed a comprehensive laboratory experiment with reaction conditions and…
Descriptors: Undergraduate Study, College Science, Laboratory Experiments, Molecular Structure
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Abu Hannifa Abdullah; Ashwin Charles; Zulhelmi Ismail – Journal of Chemical Education, 2023
Recently, smart sensing/actuation paper has attracted significant interest due to its potential usage as a sustainable component in future electronics, robotics, and intelligent sensing devices. In acknowledging the importance of this topic for the engagement of students at the university level in conjunction with Industrial Revolution 4.0, it is…
Descriptors: Chemistry, Science Experiments, Scientific Concepts, Electronics
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