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Showing 1 to 15 of 38 results Save | Export
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Bliese, Sarah L.; O'Donnell, Deanna; Weaver, Abigail A.; Lieberman, Marya – Journal of Chemical Education, 2020
A two to three period analytical chemistry experiment has been developed which allows second year students to explore chemical color tests used to detect adulterated pharmaceuticals. Students prepare several paper analytical devices (PADs) to generate positive and negative controls antibiotics, along with cutting agents such as starch and chalk.…
Descriptors: Chemistry, Science Experiments, College Science, Science Laboratories
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Malisorn, Khemchira; Wicharn, Surawut; Plaipichit, Suwan; Pipatpanukul, Chinnawut; Houngkamhang, Nongluck; Puttharugsa, Chokchai – Physics Education, 2020
This paper demonstrates the use of smartphones in an experiment of light absorption and light scattering. The LED display and camera of the smartphone are used as the light source and as the detector, respectively. The color wheel is used to choose the color of the light source to be shone through the sample for analysis. The detector directly…
Descriptors: Light, Scientific Concepts, Telecommunications, Handheld Devices
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Yurumezoglu, Kemal – Physics Education, 2020
In this article, a consecutive series of four hands-on experiments are recommended to teach the colors of paint/pigment and their mixtures. These activities, which are effective in learning about how to make a simple observation and help to build argument-based knowledge about colors, offer an integrated and innovative way of teaching colors of…
Descriptors: Physics, Hands on Science, Educational Innovation, Light
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Schulze, Tina; Quast, Günter; Bergmann, Antje; Dengler, Roman – Physics Teacher, 2020
Although nearly everyone is familiar with colors from an early age and the fundamentals of color mixing are taught at various abstraction levels throughout kindergarten to high school, we repeatedly observe that our student teachers in physics have problems in explaining the subject. Therefore, we propose an experimental setup that focuses on the…
Descriptors: Physics, Science Instruction, Teaching Methods, Science Experiments
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Palmans, Sofie; Vermeulen, Jens; Chiaverini, Natalie; Mortier, Tom – Journal of Chemical Education, 2019
The Leidenfrost nanochemistry synthesis of gold colloids was introduced in this "Journal" as an advanced method to synthesize gold nanoparticles during an undergraduate nanochemistry research project. When trying to repeat these experiments in the laboratory, we experienced difficulties in the synthesis of the gold nanoparticles since…
Descriptors: Science Instruction, College Science, Undergraduate Study, Inorganic Chemistry
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Spencer, Richard – School Science Review, 2018
To enable turf to be re-established quickly between football matches, grass needs to be grown strongly in a few days. As growth in plants requires light, artificial light is needed to supplement daylight, especially in winter months. This investigation concerns finding the most effective colours of light and hence seeking to test suitable lamps…
Descriptors: Athletics, Facilities, Botany, Lighting
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Santos, João H. P. M.; Capela, Emanuel V.; Boal-Palheiros, Isabel; Coutinho, João A. P.; Freire, Mara G.; Ventura, Sónia P. M. – Biochemistry and Molecular Biology Education, 2018
Aqueous biphasic systems (ABS) composed of polypropylene glycol and carbohydrates, two benign substances are proposed to separate two food colorants (E122 and E133). ABS are promising extractive platforms, particularly for biomolecules, due to their aqueous and mild nature (pH and temperature), reduced environmental impact and processing costs.…
Descriptors: Science Instruction, Molecular Biology, Scientific Concepts, Teaching Methods
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Petit, Matthieu; Michez, Lisa; Raimundo, Jean-Manuel; Dumas, Philippe – Physics Education, 2016
Semiconductor materials are at the core of electronics. Most electronic devices are made of semiconductors. The operation of these components is well described by quantum physics which is often a difficult concept for students to understand. One of the intrinsic parameters of semiconductors is their bandgap energy E[subscript g]. In the case of…
Descriptors: Science Instruction, Physics, Mechanics (Physics), Quantum Mechanics
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Bober, Brittany A.; Ogata, Jennifer K.; Martinez, Veronica E.; Hallinan, Janae J.; Leach, Taylor A.; Negru, Bogdan – Journal of Chemical Education, 2018
Surface structures on the nanometer size scale can impart new and exciting properties to bulk materials. Nanoscopic structures on hydrophobic materials can result in superhydrophobicity and structural coloration. We present an interdisciplinary experiment that introduces undergraduate students to nanotechnology by manipulating the…
Descriptors: Science Instruction, Chemistry, College Science, Undergraduate Study
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Rappon, Tim; Sylvestre, Jarrett A.; Rappon, Manit – Journal of Chemical Education, 2016
Flotation as a method of separation is widely researched and is applied in many industries. It has been used to address a wide range of environmental issues including treatment of wastewater, recovery of heavy metals for recycling, extraction of minerals in mining, and so forth. This laboratory attempts to show how such a simple method can be used…
Descriptors: Science Instruction, Laboratory Experiments, Science Experiments, Science Laboratories
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Carmel, Justin H.; Ward, Joseph S.; Cooper, Melanie M. – Journal of Chemical Education, 2017
One of the most mystifying products on the market for people at any age is the glow stick: a plastic tube that, when snapped, creates a flood of bright, brilliantly colored light without the use of electricity or significant production of heat. In this case, the chemiluminescence reaction also provides an exciting phenomenon through which we can…
Descriptors: Science Instruction, Cooperative Learning, Science Laboratories, College Science
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Gee, Clifford T.; Kehoe, Eric; Pomerantz, William C. K.; Penn, R. Lee – Journal of Chemical Education, 2017
Proteins are involved in nearly every biological process, which makes them of interest to a range of scientists. Previous work has shown that hand-held cameras can be used to determine the concentration of colored analytes in solution, and this paper extends the approach to reactions involving a color change in order to quantify protein…
Descriptors: Chemistry, Science Instruction, High Schools, Secondary School Science
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Thomas, Nicholas C.; Faulk, Stephen – Journal of Chemical Education, 2008
A chemical fountain, constructed from several vertically stacked plastic champagne cups, is used to demonstrate acid-base and chemiluminescence reactions. (Contains 1 figure.)
Descriptors: Chemistry, Science Instruction, Science Experiments, Color
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Nopparatjamjomras, Suchai; Chitaree, Ratchapak; Panijpan, Bhinyo – Physics Education, 2009
To overcome students' inaccurate prior knowledge on primary additive colours, a coloured-light mixer has been constructed to enable students to observe directly the colours produced and reach the conclusion by themselves that the three primary colours of light are red, green, and blue (NOT red, yellow, and blue). Three closely packed tiny…
Descriptors: Science Activities, Scientific Concepts, Light, Color
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Yaung, Jing-Fun; Chen, Yueh-Huey – Journal of Chemical Education, 2009
A novel undergraduate chemistry experiment involving superabsorbent polymers commonly used in diapers and other personal care products is described. Students observe the removal of divalent transition-metal ions from aqueous solutions by the polymers. With the procedures provided, students are able to color the superabsorbent polymers with metal…
Descriptors: Plastics, Chemistry, Undergraduate Study, Science Instruction
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