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Direct linkPavel, John T.; Hyde, Erin C.; Bruch, Martha D. – Journal of Chemical Education, 2012
This experiment introduced general chemistry students to the basic concepts of organic structures and to the power of spectroscopic methods for structure determination. Students employed a combination of IR and NMR spectroscopy to perform de novo structure determination of unknown alcohols, without being provided with a list of possible…
Descriptors: Science Experiments, Scientific Concepts, Molecular Structure, Chemistry
Grayson, Scott M. – Journal of Chemical Education, 2012
A simple, easily visualized thin-layer chromatography (TLC) staining experiment is presented that highlights the difference in reactivity between aromatic double bonds and nonaromatic double bonds. Although the stability of aromatic systems is a major theme in organic chemistry, the concept is rarely reinforced "visually" in the undergraduate…
Descriptors: Organic Chemistry, College Science, Science Instruction, Visualization
Gandia-Herrero, Fernando; Simon-Carrillo, Ana; Escribano, Josefa; Garcia-Carmona, Francisco – Journal of Chemical Education, 2012
The food industry uses different additives to give foods and beverages the appearance expected by the consumer. Among them, pigments of natural origin are receiving increasing attention due to safety concerns about traditional colorants and the relevance of a healthy diet. This experiment describes the quantitative determination of the…
Descriptors: Chemistry, Laboratory Experiments, College Science, Undergraduate Study
Koroluk, Katherine J.; Jackson, Derek A.; Dicks, Andrew P. – Journal of Chemical Education, 2012
Students prepare a tertiary amine antifungal analog in an upper-level undergraduate organic laboratory. A microscale Petasis reaction is performed to generate a liquid compound readily characterized via IR and proton NMR spectroscopy. The biological relevance of the product is highlighted, with the tertiary amine scaffold being an important…
Descriptors: Chemistry, College Science, Science Instruction, Undergraduate Study
Fernandez, Alberto; Lopez-Torres, Margarita; Fernandez, Jesus J.; Vazquez-Garcia, Digna; Vila, Jose M. – Journal of Chemical Education, 2012
A laboratory experiment for students in advanced inorganic chemistry is described. Students prepare palladium(II) cyclometalated complexes. A terdentate [C,N,O] Schiff base ligand is doubly deprotonated upon reaction with palladium(II) acetate in a self-assembly process to give a palladacycle with a characteristic tetranuclear structure. This…
Descriptors: Laboratory Experiments, Inorganic Chemistry, College Science, Science Laboratories
Tan, T. L.; Lebron, G. B. – Journal of Chemical Education, 2012
The integrated absorbance areas of vibrational bands of CO[subscript 2], CO, and CH[subscript 4] gases in cigarette smoke were measured from Fourier transform infrared (FTIR) spectra to derive the partial pressures of these gases at different smoke times. The quantity of the three gas-phase components of cigarette smoke at different smoke times…
Descriptors: Chemistry, Teaching Methods, Laboratory Experiments, Science Instruction
Palazzo, Teresa A.; Truong, Tiana T.; Wong, Shirley M. T.; Mack, Emma T.; Lodewyk, Michael W.; Harrison, Jason G.; Gamage, R. Alan; Siegel, Justin B.; Kurth, Mark J.; Tantillo, Dean J. – Journal of Chemical Education, 2015
An applied computational chemistry laboratory exercise is described in which students use modern quantum chemical calculations of chemical shifts to assign the structure of a recently isolated natural product. A pre/post assessment was used to measure student learning gains and verify that students demonstrated proficiency of key learning…
Descriptors: Science Instruction, Spectroscopy, Organic Chemistry, Science Laboratories
Arnold, Randy J.; Arndt, Brett; Blaser, Emilia; Blosser, Chris; Caulton, Dana; Chung, Won Sog; Fiorenza, Garrett; Heath, Wyatt; Jacobs, Alex; Kahng, Eunice; Koh, Eun; Le, Thao; Mandla, Kyle; McCory, Chelsey; Newman, Laura; Pithadia, Amit; Reckelhoff, Anna; Rheinhardt, Joseph; Skljarevski, Sonja; Stuart, Jordyn; Taylor, Cassie; Thomas, Scott; Tse, Kyle; Wall, Rachel; Warkentien, Chad – Journal of Chemical Education, 2011
A multivitamin tablet and liquid are analyzed for the elements calcium, magnesium, iron, zinc, copper, and manganese using atomic absorption spectrometry. Linear calibration and standard addition are used for all elements except calcium, allowing for an estimate of the matrix effects encountered for this complex sample. Sample preparation using…
Descriptors: Chemistry, Spectroscopy, Biochemistry, Nutrition
Segurado, Manuel A. P.; Silva, Margarida F. B.; Castro, Rita – International Journal of Mathematical Education in Science and Technology, 2011
The mathematical language and its tools are complementary to the formalism in chemistry, in particular at an advanced level. It is thus crucial, for its understanding, that students acquire a solid knowledge in Calculus and that they know how to apply it. The frequent occurrence of indeterminate forms in multiple areas, particularly in Physical…
Descriptors: Mathematics, Chemistry, Calculus, Models
Bott, Tina M.; Wan, Hayley – Journal of Chemical Education, 2013
Students sometimes have difficulty grasping the importance of when and how basic distillation techniques, column chromatography, TLC, and basic spectroscopy (IR and NMR) can be used to identify unknown compounds within a mixture. This two-part experiment uses mixtures of pleasant-smelling, readily available terpenoid compounds as unknowns to…
Descriptors: Science Instruction, College Science, Undergraduate Study, Organic Chemistry
Oi, Misato; Saito, Hirofumi; Li, Zongfeng; Zhao, Wenjun – Brain and Language, 2013
To examine the neural mechanism of co-speech gesture production, we measured brain activity of bilinguals during an animation-narration task using near-infrared spectroscopy. The task of the participants was to watch two stories via an animated cartoon, and then narrate the contents in their first language (Ll) and second language (L2),…
Descriptors: Cognitive Processes, Bilingualism, Animation, Cartoons
Ota, Toyosaku; Iida, Junzo; Sawada, Masayuki; Suehiro, Yuko; Yamamuro, Kazuhiko; Matsuura, Hiroki; Tanaka, Shohei; Kishimoto, Naoko; Negoro, Hideki; Kishimoto, Toshifumi – Child Psychiatry and Human Development, 2013
Recent developments in near-infrared spectroscopy (NIRS) have enabled non-invasive clarification of brain functions in psychiatric disorders. Functional neuroimaging studies of patients with obsessive-compulsive disorder (OCD) have suggested that the frontal cortex and subcortical structures may play a role in the pathophysiology of the disorder.…
Descriptors: Anxiety Disorders, Brain Hemisphere Functions, Spectroscopy, Control Groups
Moraes, Edgar P.; da Silva, Nilbert S. A.; de Morais, Camilo de L. M.; das Neves, Luiz S.; de Lima, Kassio M. G. – Journal of Chemical Education, 2014
The flame test is a classical analytical method that is often used to teach students how to identify specific metals. However, some universities in developing countries have difficulties acquiring the sophisticated instrumentation needed to demonstrate how to identify and quantify metals. In this context, a method was developed based on the flame…
Descriptors: Science Instruction, College Science, Science Laboratories, Undergraduate Study
Fedor, Anna M.; Toda, Megan J. – Journal of Chemical Education, 2014
The hydrogen bonding of phenol can be used as an introductory model for biological systems because of its structural similarities to tyrosine, a para-substituted phenol that is an amino acid essential to the synthesis of proteins. Phenol is able to form hydrogen bonds readily in solution, which makes it a suitable model for biological…
Descriptors: Spectroscopy, Chemistry, Science Education, Investigations
Frey, E. Ramsey; Sygula, Andrzej; Hammer, Nathan I. – Journal of Chemical Education, 2014
This laboratory exercise introduces undergraduate chemistry majors to the spectroscopic and theoretical study of the polycyclic aromatic hydrocarbon (PAH), corannulene. Students explore the spectroscopic properties of corannulene using UV-vis and Raman vibrational spectroscopies. They compare their experimental results to simulated vibrational…
Descriptors: Undergraduate Students, Chemistry, Spectroscopy, Molecular Structure
