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JCE DLib Metadata Catalog: Home |
| This is the metadata catalogue area of the Journal of Chemical Education Digital Library (JCE DLib).
JCE Digital Library collects and catalogues digital resources available on the WWW in the area of chemistry education. The items you find in our collections are not limited to those at JCE Online, but include exemplary resources found throughout the WWW.
JCE DLib is a Collection of the National Science Digital Library (NSDL), supported by the NSF. |
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Our Featured Molecules this month come from the paper by Pelter et. al. on the analysis of leaf extracts by thin-layer chromatography (1). As the authors discuss, their experiment may be used in courses at various levels of the curriculum. The molecules discussed in the paper are also of wide intere...
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Over the past decade or so the phrase “emerging research suggests” has entered the argot of advertising, and that phrase has been applied to this month’s Featured Molecule, lycopene, particularly with regard to potential health benefits of tomatoes. The paper by Jie Zhu, Mingjie Zhang, and Qingwei L...
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This month’s featured molecules come from the paper by John M. Berger, Roshniben J. Rana, Hira Javeed, Iqra Javeed, and Sandi L. Schulien (1) describing the use of DPPH to measure antioxidant activity. DPPH was one of the featured molecules in September 2007 (2) and the basics of antioxidant activit...
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Our Featured Molecules this month come from the paper by Evangelos Aktoudianakis, Elton Chan, Amanda R. Edward, Isabel Jarosz, Vicki Lee, Leo Mui, Sonya S. Thatipamala, and Andrew P. Dicks (1), in which they describe the synthesis of 4-phenylphenol using an aqueous-based Suzuki reaction. The authors...
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Our JCE Featured Molecules for this month come from the paper by Thomas E. Smith, David P. Richardson, George A. Truran, Katherine Belecki, and Megumi Onishi (1). The authors describe the use of a chiral auxiliary, 4-benzyl-2-oxazolidinone, in the synthesis of a chiral carboxylic acid. The ma...
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The Featured Molecules for this month come from the paper by Shawn Hasan, Deborah Bromfield-Lee, Maria T. Oliver-Hoyo, and Jose A. Cintron-Maldonado (1). The authors describe a forensic chemistry exercise in which model compounds are used to simulate the behavior of various drugs in a series of chem...
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Courses in computational chemistry are increasingly common at the undergraduate level. Excellent user-friendly programs, which make the execution of ab initio calculations quite simple, are available. However, there is a danger that the underlying SCF procedure (usually coupled with contracted Gauss...
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In typical physical chemistry courses the student is told how the van der Waals equation works. The mathematics needed for making a Maxwell construction is difficult for the average chemistry student (what is needed are the roots of a cubic polynomial). This makes it difficult to show how the liquid...
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SymmetryApp is a new visualization program characterized by a high level of user interactivity. Specifically, it is able to define a symmetry element anywhere in the molecule and determine the effect of the corresponding symmetry operation. This allows students to capitalize on the most important as...
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Drops of oil in Mn(SO4)(aq) and drops of the solution in oil show opposite effects when brought near a rare earth magnet. Oxygen, nitrogen, and air bubbles atop water show expected attraction, repulsion, and null behavior, respectively. Air bubbles atop aqueous Mn(SO4) show par...
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The phenolphthalein–pink tornado demonstration utilizes the vortex generated by a spinning magnetic stirring bar in a 1 L graduated cylinder containing 0.01 M HCl to demonstrate Le Châtelier's principle as it applies to the phenolphthalein equilibrium in water
H2In + 2H2O 2...
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A classroom demonstration detailing the procedure for the separation of a ternary mixture consisting of intensely colored compounds using silica gel column chromatography is described. The audience can follow the compounds during their passage through the column as individual, colored bands while le...
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A variation on the demonstration of the electrolysis of water at iron nails, using 1,10-phenanthroline and thymolphthalein, is described. The 1,10-phenanthroline is proposed as an alternative to the traditional potassium hexacyanoferrate(III) for detection of Fe2+ produced at the anode na...
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This article describes an alternative to traditional methanol-based flame tests; this alternative may be a safer demonstration.
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Additional suggestions for demonstrating flame tests and water hydrolysis have been added to the DigiDemos collection to supplement the traditional demonstrations.
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