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Lopez-Gazpio, Josu; Lopez-Gazpio, Inigo – Journal of Chemical Education, 2020
In this article we describe the construction of a low-cost electronic device to adapt the widespread traditional approach of Analytical Chemistry teaching into laboratory experimentation based on the guided research model. To this aim we construct a portable electronic instrument based on the Arduino microcontroller and use it to develop various…
Descriptors: Chemistry, Science Instruction, Science Laboratories, Laboratory Experiments
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Maslova, K.; de Jesus, V. L. B.; Sasaki, D. G. G. – Physics Education, 2020
In general, undergraduate experimental physics laboratories do not usually have experiments designed to address rolling friction and to measure the value of the rolling friction coefficient. This work explores an experiment, which has the potential to arouse students' curiosity about rolling friction by addressing a counterintuitive aspect of the…
Descriptors: Physics, Science Instruction, Science Experiments, Scientific Concepts
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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
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Mooney, Madison; Vreugdenhil, Andrew J.; Shetranjiwalla, Shegufa – Journal of Chemical Education, 2020
Green chemistry metrics and life-cycle analysis (LCA) were used to assess inefficiencies in two current organic chemistry experiments conducted in third-year organic chemistry to synthesize ("E")-stilbene from benzaldehyde. An alternative Wittig-based, greener, one-pot experiment using the same starting material was selected as a vehicle…
Descriptors: Organic Chemistry, College Science, Undergraduate Students, Science Experiments
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Yuan, Min; Sun, Chun-Yan; Liu, Yi-Wei; Lu, Ying; Zhang, Zhong; Li, Xiao-Hui; Tian, Hong-Rui; Zhang, Shan; Liu, Shu-Xia – Journal of Chemical Education, 2020
A research-style laboratory experiment for advanced undergraduate students is described, which includes the synthesis, characterization, and properties (porosity, stability, amphipathy) testing of the composite [Cu[subscript 2](BTC)[subscript 4/3](H[subscript 2]O)[subscript 2][subscript 6][HPW[subscript 12]O[subscript 40]·(C[subscript…
Descriptors: Inorganic Chemistry, Science Experiments, Laboratory Experiments, Advanced Students
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Kajornklin, Penbhorn; Jarujamrus, Purim; Phanphon, Phuwadon; Ngernpradab, Pakakan; Supasorn, Saksri; Chairam, Sanoe; Amatatongchai, Maliwan – Journal of Chemical Education, 2020
This work reports the first use of rubber latex waste as the hydrophobic reagent for a low-cost, simple, and rapid fabrication of a paper towel-based experimental device (PTED) with a circular design of 5 mm to demonstrate the factors affecting chemical equilibrium; this serves as a user-friendly means for a laboratory experiment. The illustration…
Descriptors: Secondary School Science, College Science, Science Experiments, Science Equipment
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Ren, Jolie; Lin, Tiffany; Sprague, Leonard W.; Peng, Iris; Wang, Li-Qiong – Journal of Chemical Education, 2020
Introducing chemical equilibrium concepts in undergraduate general chemistry promotes improved understanding of chemical reactions. We have developed an engaging laboratory experiment exploring the equilibrium of cobalt complexation in alcohols using UV-vis spectroscopy and successfully implemented in a large general chemistry class of 378…
Descriptors: Chemistry, College Science, Laboratory Experiments, Science Experiments
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Lee, Jisun; Schmink, Jason R.; Berritt, Simon – Journal of Chemical Education, 2020
A contemporary undergraduate laboratory experiment incorporating parallel microscale experimentation was developed for the well-defined palladium catalyzed Suzuki-Miyaura cross coupling of 4-fluorophenylboronic acid with both 4-chloro- and 4-bromoanisole using 11 diverse phosphine ligands and one ligandless control. This laboratory introduces…
Descriptors: College Science, Science Instruction, Undergraduate Study, Science Laboratories
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Eberly, B.; Lincoln, D. – Physics Teacher, 2022
Neutrinos are perhaps the least understood of the known denizens of the subatomic world. They have nearly no mass, interact only via the weak nuclear force and gravity, and, perhaps most surprising, the three known species of neutrinos can transform from one variant into another. This transformation, called neutrino oscillation, has been…
Descriptors: Scientific Concepts, Nuclear Physics, Scientific Research, Quantum Mechanics
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Hopper, Amy; Beswick-Jones, Hana; Brown, Angus M. – Advances in Physiology Education, 2022
The application of physico-chemical principles has been routinely used to explain various physiological concepts. The Nernst equation is one example of this, used to predict the potential difference created by the transmembrane ion gradient resulting from uneven ion distribution within cellular compartments and the interstitial space. This…
Descriptors: Chemistry, Scientific Principles, Physiology, Equations (Mathematics)
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Çoban, Atakan; Erol, Mustafa – Physics Education, 2022
The present study reports an Arduino-based STEM education material that resolves the kinematics of a moving object, specifically focusing on two dimensional motion of the object. Throughout the work, a sample application that can be prepared in a classroom where students are active and including the acquisitions of Technology, Engineering, Physics…
Descriptors: STEM Education, Motion, Science Instruction, Measurement Equipment
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Song, Limin; Huang, Yubi; Dong, Jianxun; Zhu, Baolin; Huang, Weiping – Journal of Chemical Education, 2022
Morphology-dependent properties are significant in chemistry and material sciences. This laboratory experiment, designed for upper-division undergraduates in chemistry and related majors, emphasizes the concepts of the shape-controlled synthesis of crystal particles and the influences of crystal particle morphologies on their reaction…
Descriptors: Undergraduate Students, Laboratory Experiments, Chemistry, Majors (Students)
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Lazos, Panagiotis; Nezis, Anastasios; Kyriazopoulos, Nikolaos – Physics Teacher, 2022
The interference pattern between two harmonic oscillations with slightly different frequencies are called beats. The beats, as a combined motion, have two different periods, one approximately equal to the period of the original oscillations, and another that is significantly longer and is related to the variable amplitude of the motion. The main…
Descriptors: Science Instruction, Physics, Motion, Science Experiments
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Kang, Eunju; Park, Jongho – Physics Education, 2022
The reflection and refraction of light are more familiar to students than the reflection and refraction of sound. Reflection and refraction that occur during the transmission of sound waves are common phenomena in everyday life but are often difficult to understand during actual learning. In this study, we developed a sound reflection and…
Descriptors: Physics, Science Experiments, Science Equipment, Acoustics
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Spiecker, Henrike; Bitzenbauer, Philipp – Physics Education, 2022
Why does a raindrop on a window pane show an image of the environment that is turned upside-down? And why does vision go blurry underwater, but is perfectly clear with diving goggles? Our everyday life is rich in optical phenomena. Unfortunately, these phenomena often play a subordinate role in Optics teaching, compared to ray constructions or…
Descriptors: Science Instruction, Physics, Optics, Science Experiments
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