An EPR study of intact and powdered human tooth enamel dried at 400�C
| Autor: | Ronald Verbeeck, Paul Moens, Freddy Callens |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Materials science
Enamel paint Endocrinology Diabetes and Metabolism Radical Analytical chemistry Mineralogy Block (periodic table) Spectral line Ion law.invention stomatognathic diseases Endocrinology medicine.anatomical_structure stomatognathic system Human tooth law visual_art medicine visual_art.visual_art_medium Orthopedics and Sports Medicine Anisotropy Electron paramagnetic resonance |
| Zdroj: | Calcified Tissue International. 56:543-548 |
| ISSN: | 1432-0827 0171-967X |
| Popis: | An EPR study of human tooth enamel dried at 400°C is presented. Enamel blocks as well as powdered samples were investigated. The discussion deals mainly with three different spectral components, i.e., a CO 3 3- and two different CO 2 - signals. Using the anisotropic enamel block spectra, a convincing differentiation between the latter two radicals was possible. The first CO 2 - signal shows no dependence on the orientation of the enamel blocks, disappears from the spectrum upon heating, and was assigned to a surface radical. The second CO 2 - component is mainly responsible for the angular variation of the enamel blocks and is assigned to a bulk position. For the CO 3 3- ion, the (pseudo) angular variation of its isolated spectrum is presented and discussed. By means of the results presented in this study, earlier interpretation problems are considerably reduced. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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