An EPR study of intact and powdered human tooth enamel dried at 400 degrees C.

作者: F. Callens , P. Moens , R. Verbeeck

DOI: 10.1007/BF00298587

关键词: IonHuman toothAnalytical chemistryRadicalElectron paramagnetic resonanceMineralogyBlock (periodic table)Spectral lineMaterials scienceEnamel paintAnisotropy

摘要: An EPR study of human tooth enamel dried at 400°C is presented. Enamel blocks as well powdered samples were investigated. The discussion deals mainly with three different spectral components, i.e., a CO 3 3- and two 2 - signals. Using the anisotropic block spectra, convincing differentiation between latter radicals was possible. first signal shows no dependence on orientation blocks, disappears from spectrum upon heating, assigned to surface radical. second component responsible for angular variation bulk position. For ion, (pseudo) its isolated presented discussed. By means results in this study, earlier interpretation problems are considerably reduced.

参考文章(16)
P. Moens, P. Devolder, R. Hoogewijs, F. Callens, R. Verbeeck, Maximum-Likelihood Common-Factor Analysis as a Powerful Tool in Decomposing Multicomponent EPR Powder Spectra Journal of Magnetic Resonance, Series A. ,vol. 101, pp. 1- 15 ,(1993) , 10.1006/JMRA.1993.1001
F. J. Callens, R. M. H. Verbeeck, P. F. A. Matthys, L. C. Martens, E. R. Boesman, F. C. M. Driessens, The ESR Spectrum Near G=2 of Carbonated Calciumapatites Synthesized at High Temperature Bulletin des Sociétés Chimiques Belges. ,vol. 95, pp. 589- 596 ,(2010) , 10.1002/BSCB.19860950801
P. Moens, F. Callens, P. Matthys, F. Maes, R. Verbeeck, D. Naessens, Adsorption of carbonate-derived molecules on the surface of carbonate-containing apatites Journal of the Chemical Society, Faraday Transactions. ,vol. 87, pp. 3137- 3141 ,(1991) , 10.1039/FT9918703137
Takaaki Aoba, Toshio Yagi, Crystallographic and structural alterations in the mineral phase of human enamel with carious attacks. Journal of Oral Pathology & Medicine. ,vol. 11, pp. 201- 209 ,(1982) , 10.1111/J.1600-0714.1982.TB00157.X
F. J. Callens, R. M. H. Verbeeck, P. F. A. Matthys, L. C. Martens, E. R. Boesman, 13C‐Hyperfine Couplings of Carbonate Radicals in Carbonated Calciumapatites Synthesized at High Temperature Bulletin des Sociétés Chimiques Belges. ,vol. 96, pp. 165- 171 ,(2010) , 10.1002/BSCB.19870960301
Peter D. Moens, Freddy J. Callens, Paul F. Matthys, Ronald M. Verbeeck, 31 P and 1H powder ENDOR and molecular orbital study of a CO33– ion in X-irradiated carbonate containing hydroxyapatites Journal of the Chemical Society, Faraday Transactions. ,vol. 90, pp. 2653- 2662 ,(1994) , 10.1039/FT9949002653
F. J. Callens, R. M. H. Verbeeck, D. E. Naessens, P. F. A. Matthys, E. R. Boesman, Effect of carbonate content on the ESR spectrum near g = 2 of carbonated calciumapatites synthesized from aqueous media. Calcified Tissue International. ,vol. 44, pp. 114- 124 ,(1989) , 10.1007/BF02556470
Gregor Cevc, Pavle Cevc, Milan Schara, UroŠ SkaleriČ, The caries resistance of human teeth is determined by the spatial arrangement of hydroxyapatite microcrystals in the enamel Nature. ,vol. 286, pp. 425- 426 ,(1980) , 10.1038/286425A0
F. J. Callens, R. M. H. Verbeeck, D. E. Naessens, P. F. A. Matthys, E. R. Boesman, ESR study of 13C-enriched carbonated calciumapatites precipitated from aqueous solutions. Calcified Tissue International. ,vol. 52, pp. 386- 391 ,(1993) , 10.1007/BF00310204
F. J. Callens, R. M. H. Verbeeck, D. E. Naessens, P. F. A. Matthys, E. R. Boesman, The effect of carbonate content and drying temperature on the ESR-spectrum near g = 2 of carbonated calciumapatites synthesized from aqueous media. Calcified Tissue International. ,vol. 48, pp. 249- 259 ,(1991) , 10.1007/BF02556376