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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
Ifat Parveen; Michael Rose; Helen C. Phillips; Stephen E. Flower; Timothy J. Woodman; Cameron A. Garty; Michael D. Threadgill – Journal of Chemical Education, 2023
An understanding of basic organic chemical reactivity is key for many biosciences students. The reactivities of different carbonyl groups affect their function in many biomolecules. A practical class, the two-step synthesis of paracetamol, has been devised to illustrate the electrophilic reactivities of carbonyls, which was covered in the…
Descriptors: Undergraduate Study, College Science, Synthesis, Scientific Concepts
Molecular Structure from Models to Mastery: An Inquiry-Based Study of Human Insulin-Degrading Enzyme
Michael A. Araujo; Alexandra A. Barrere; Selena-Rae Tirado; Candace E. Williams; Monica I. Strada; Benjamin J. Alper – Journal of Chemical Education, 2022
Using crystal structure data, site directed mutagenesis, and real-time kinetic assays, students designed, expressed, and purified engineered mutants of human insulin-degrading enzyme (IDE). Students designed their own IDE mutants following "in silico" analysis, used inverse PCR to generate mutant plasmid expression constructs, expressed…
Descriptors: Molecular Structure, Science Instruction, Science Laboratories, Science Experiments
Grebenev, Igor V.; Kazarin, Petr V.; Lebedeva, Olga V. – Physics Education, 2022
The article describes a new version of a demonstration experiment for the Maxwell distribution. In the first part students analyse the applicability of the Gaussian distribution to the projection of the particle velocities in the suggested experiment. Further, students observe two-dimensional distribution of particles by the modulus of velocity in…
Descriptors: Science Instruction, Science Experiments, Scientific Concepts, Mathematical Formulas
Medel-Esquivel, Ricardo; Gómez-Vargas, Isidro; García-Salcedo, Ricardo; Vázquez, J. Alberto – Physics Teacher, 2021
One of the main topics of elementary physics is the idea that every material is composed of "little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one other." These particles could be atoms or molecules. Atoms are the smallest part into…
Descriptors: Secondary School Science, College Science, Scientific Concepts, Motion
Ravera, Mauro; Gabano, Elisabetta – Journal of Chemical Education, 2021
This is an easy and cheap experiment where chemistry Masters students can evaluate the role of some metal ions (i.e., Cu[superscript II] and Mn[superscript II]) in dopamine oxidation, related to Parkinsonism. The required prior knowledge is being familiar with the basis of UV-vis spectroscopy. Details of the activity, including procedure and…
Descriptors: Science Instruction, Chemistry, Science Experiments, College Science
Lisensky, George; Dauzvardis, Fabian; Luo, Jiaqi; Horger, Jacob; Koenig, Emma – Journal of Chemical Education, 2020
Polymers and nanochemistry are important facets of chemistry. In this experiment, students synthesize monodispersed poly(methyl methacrylate) nanospheres from the addition or chain polymerization of a rapidly stirred aqueous mini-emulsion of methyl methacrylate. The 2,2'-azobis(2-methylpropionamidine) dihydrochloride serves as a heat activated,…
Descriptors: Science Instruction, Chemistry, Scientific Concepts, Molecular Structure
Li, Zihao; Ganda, Sylvia; Melodia, Daniele; Boyer, Cyrille; Chapman, Robert – Journal of Chemical Education, 2020
We present the use of an oxygen tolerant controlled radical polymerization (photoinduced electron/energy transfer-reversible addition fragmentation chain transfer polymerization, PET-RAFT) as a simple method for preparing controlled radical polymers in an undergraduate laboratory. Unlike conventional techniques, PET-RAFT polymerizations require no…
Descriptors: Science Instruction, Science Laboratories, College Science, Undergraduate Study
Jung, Jiyoung; Dinescu, Adriana; Kukrek, Ahmet – Journal of Chemical Education, 2020
Recently, researchers have paid extensive attention to colorimetric/fluorimetric probe development and its applications in biological and industrial samples. The actual development of such probe molecules, however, often requires an iterative process to achieve certain goals such as selectivity and sensitivity toward a target analyte. In spite of…
Descriptors: College Science, Science Instruction, Chemistry, Kinetics
Bur, Scott K.; Pomerantz, William C. K.; Bade, Morgan L.; Gee, Clifford T. – Journal of Chemical Education, 2021
Curriculum-based undergraduate research experiences (CUREs) have been shown to increase student retention in STEM fields and are starting to become more widely adopted in chemistry curricula. Here we describe a 10-week CURE that is suitable for a second-semester organic chemistry laboratory course. Students synthesize small molecules and use…
Descriptors: Organic Chemistry, College Science, Undergraduate Students, Scientific Research
Qianfu Luo; Chenyu Shi; Zhaoxia Wang; Meng Chen; Da-Hui Qu – Journal of Chemical Education, 2022
Given the importance of self-healing polymers for chemistry education, herein, we introduce our latest research results in self-healing materials based on thioctic acid into undergraduate chemistry laboratory. In this experiment, a natural small molecule, thioctic acid (TA), and a few other commercially-available reagents have been used to make a…
Descriptors: Chemistry, Plastics, Undergraduate Study, College Science
Huggins, Michael T.; Kesharwani, Tanay; Buttrick, Jonathan; Nicholson, Christopher – Journal of Chemical Education, 2020
Nuclear magnetic resonance (NMR) spectroscopy has become a cornerstone tool for studying a variety of molecular features in advanced chemistry laboratories. In this experiment, students prepare a pyrrole-[beta]-amide via a one-pot, three-step synthesis and use NMR spectroscopy to confirm its molecular structure. In addition, variable temperature…
Descriptors: Spectroscopy, Science Experiments, College Science, Undergraduate Study
Hu, Zheng-Li; Ying, Yi-Lun; Huo, Ming-Zhu; Kong, Xuan-Feng; Yu, Xiao-Dong; Zhang, Jian-Rong; Long, Yi-Tao – Journal of Chemical Education, 2020
The prompt introduction of single-molecule science into undergraduates' curricula is an urgent but challenging task. However, the research experiments are often too complicated and the instruments are too expensive to be widely transferred into a compulsory course of undergraduate students. Herein, we introduce a recently developed nanopore…
Descriptors: College Science, Undergraduate Study, Science Instruction, Hands on Science
Fitzgerald, Jeffrey P.; Ferrante, Robert F.; Brown, Michael; Cabarrus, Jonathan – Journal of Chemical Education, 2020
The concept of equilibrium vapor pressure plays a key role in the general chemistry curriculum; it is among the first and most easily demonstrated examples of equilibrium and frequently caps off the first semester of general chemistry where it illustrates the properties of liquids and intermolecular forces. We report here simple modifications of…
Descriptors: Science Instruction, Chemistry, Science Experiments, Science Laboratories
Park, Chulkyu; Lee, Chang Youn; Hong, Hun-Gi – Journal of Chemical Education, 2020
According to the definition, surface tension could be affected not only by intermolecular interaction but also by molecular area. However, in chemistry textbooks, surface tension is mainly explained only in terms of intermolecular interaction. Although the existing surface tension concept in the textbooks can lead to a variety of counterexamples,…
Descriptors: Science Instruction, College Science, Undergraduate Study, Molecular Structure