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Kasprowiak, Amaury; Cazier-Dennin, Francine; Danjou, Pierre-Edouard – Journal of Chemical Education, 2020
A flash purification system using prepacked cartridges containing different silica weights and particle sizes was employed to demonstrate the influence of column characteristics on chromatographic resolution. This chromatographic experiment was a helpful introduction to chromatographic courses where the influence of particle sizes was addressed…
Descriptors: Chemistry, Science Experiments, Active Learning, Hands on Science
Amirjani, Amirmostafa; Koochak, Niloofar Namazi; Haghshenas, Davoud Fatmehsari – Journal of Chemical Education, 2019
In the laboratory experiment described here, students synthesize silver nanostructures (AgNS) with different shapes and sizes to elucidate the shape- and size-dependent optical properties of nanostructured materials. Students also develop understanding of some thermodynamic and kinetic aspects of the synthesis process through this experiment. In…
Descriptors: Spectroscopy, Thermodynamics, Laboratory Experiments, Science Instruction
Miller, Tyson A.; Spangler, Michael; Burdette, Shawn C. – Journal of Chemical Education, 2011
A two-period organic laboratory experiment that includes fluorescence sensing is presented. The pH-sensitive sensor MorphFl is prepared using a Mannich reaction between a fluorescein derivative and the iminium ion of morpholine. During the first laboratory, students prepare MorphFl. The second session begins with characterizing the sensor using…
Descriptors: Science Instruction, Science Laboratories, Organic Chemistry, Lighting
Ledbetter, Michael P.; Hwang, Tony W.; Stovall, Gwendolyn M.; Ellington, Andrew D. – Biochemistry and Molecular Biology Education, 2013
Evolution is a defining criterion of life and is central to understanding biological systems. However, the timescale of evolutionary shifts in phenotype limits most classroom evolution experiments to simple probability simulations. "In vitro" directed evolution (IVDE) frequently serves as a model system for the study of Darwinian…
Descriptors: Molecular Biology, Evolution, Demonstrations (Educational), Science Laboratories
Dangkulwanich, Manchuta; Kongnithigarn, Kaness; Aurnoppakhun, Nattapat – Journal of Chemical Education, 2018
Routinely used in quantitative determination of various analytes, UV-vis spectroscopy is commonly taught in undergraduate chemistry laboratory courses. Because the technique measures the absorbance of light through the samples, losses from reflection and scattering by large molecules interfere with the measurement. To emphasize the importance of…
Descriptors: Telecommunications, Handheld Devices, Educational Technology, Technology Uses in Education
Salman Ashraf, S.; Rauf, M. A.; Abdullah, Fatema H. – Research in Science & Technological Education, 2012
Background: One of the unfortunate side effects of the industrial revolution has been the constant assault of the environment with various forms of pollution. Lately, this issue has taken a more critical dimension as prospects of global climate change and irreversible ecosystem damage are becoming a reality. Purpose: College graduates (especially…
Descriptors: Foreign Countries, Chemistry, Ecology, Climate
Amaris, Zoe N.; Freitas, Daniel N.; Mac, Karen; Gerner, Kyle T.; Nameth, Catherine; Wheeler, Korin E. – Journal of Chemical Education, 2017
A series of laboratory experiments were developed to introduce first-year chemistry students to nanoscience through a green chemistry approach. Students made and characterized the stability of silver nanoparticles using two different methods: UV-visible spectroscopy and dynamic light scattering. They then assessed the ecotoxicity of silver…
Descriptors: Science Instruction, College Science, Undergraduate Study, Chemistry
Capobianco, Brenda; Thiel, Elizabeth Andrew – Science and Children, 2006
Students may be slathered with SPF 30 sunscreen all summer at the beach or pool, but what do they know about ultraviolet (UV) light radiation and absorption? The authors of this article found the perfect opportunity to help students find out the science behind this important health precaution, when they developed a series of practical strategies…
Descriptors: Investigations, Elementary School Science, Science Activities, Science Process Skills
Libarkin, Julie C.; Asghar, Anila; Crockett, C.; Sadler, Philip – Astronomy Education Review, 2011
The importance of nonvisible wavelengths for the study of astronomy suggests that student understanding of nonvisible light is an important consideration in astronomy classrooms. Questionnaires, interviews, and panel discussions were used to investigate 6-12 student and teacher conceptions of ultraviolet (UV) and infrared (IR). Alternative…
Descriptors: Astronomy, Radiation, Scientific Concepts, Teachers
Knowlton, Marie – Education of the Visually Handicapped, 1986
The article examines evidence of visual impairment caused by excessive amounts of ultraviolet (UV) light. Among considerations when using a source of UV light for vision stimulation are the position of the child and teacher, use of window glass filters or protective glasses, and careful recordkeeping of all UV stimulation. (Author/JW)[
Descriptors: Concept Teaching, Elementary Education, Eye Fixations, Light
Asai, Elizabeth; Cao, Sharon – NCSSSMST Journal, 2009
The purpose of this investigation was to determine if three Western species of the Panax, Lycium, and Astragalus genera had antibacterial and/or antioxidant properties, and how their properties compared to Eastern herbs in the same genera. The group hypothesized that when compared, the corresponding herbs would have identical antibacterial and…
Descriptors: Plants (Botany), Microbiology, Radiation, Science Experiments
Ibanez, Jorge G.; Mena-Brito, Rodrigo; Fregoso-Infante, Arturo – Journal of Chemical Education, 2005
A microscale experiment in which the simultaneous oxidation of an organic compound and the reduction of a metal ion are photocatalytically performed in an aqueous slurry containing TiO[subscript 2] irradiated with UV light. This experiment can be performed in the laboratory session with simple chemicals and equipments.
Descriptors: Laboratory Experiments, Chemistry, Light, Organic Chemistry
Peer reviewed
Lawrence, Glen D.; Fishelson, Stuart – Journal of Chemical Education, 1999
Describes an activity that demonstrates catalysis of chemical reactions by ultraviolet (UV) light using one of the earliest photographic processes, the cyanotype process. (CCM)
Descriptors: Chemical Reactions, Chemistry, Hands on Science, Integrated Activities
Yaroch, Amy L.; Reynolds, Kim D.; Buller, David B.; Maloy, Julie A.; Geno, Cristy R. – Health Education & Behavior, 2006
This article describes a validity study conducted among middle school students comparing self-reported sun safety behaviors from a diary with readings from ultraviolet (UV) monitors worn on different body sites. The UV monitors are stickers with panels that turn increasingly darker shades of blue in the presence of increasing amounts of UV light.…
Descriptors: Safety, Cancer, Validity, Clothing
Peer reviewed
Stabile, Ryan G.; Dicks, Andrew P. – Journal of Chemical Education, 2004
A student procedure focusing on multistep sunscreen synthesis and spectroscopic analysis is reported. A two-step synthetic pathway towards sunscreens, an analog of a commercially available UV light blocker is designed, given the current high profile nature of skin cancer and media attention towards sunscreens.
Descriptors: Radiation, Cancer, Spectroscopy, Chemistry