Literaturnachweis - Detailanzeige
| Autor/in | Helseth, L. E. |
|---|---|
| Titel | A Simple Experiment for Visualizing Diffusion |
| Quelle | In: European Journal of Physics, 32 (2011) 5, S. 1193-1197
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0143-0807 |
| DOI | 10.1088/0143-0807/32/5/007 |
| Schlagwörter | Forschungsbericht; Photography; Chemistry; Experiments; Visual Stimuli; Scientific Concepts; Evaluation Methods; Undergraduate Study; College Science; Laboratories |
| Abstract | We propose a simple and fascinating experiment for studying diffusion in gels using a pH-sensitive dye. By doping agar with methyl red, we obtain a gel which rapidly reacts to changes in pH by changing its absorption spectrum. The pH gradients can be followed using a digital camera, and we demonstrate here that the pH-sensitive colour changes can be used to print colour patterns in the gel which due to diffusion of ions may disappear entirely. (Contains 5 figures.) (As Provided). |
| Anmerkungen | Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: info@ioppubusa.com; Web site: http://www.iop.org/EJ/journal/EJP |
| Begutachtung | Peer reviewed |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2017/4/10 |
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