✍ Scribed by Claude Coupry; Gérard Sagon; Pascale Gorguet-Ballesteros
No coin nor oath required. For personal study only.
Reference (natural and synthetic) indigo samples were analysed by Raman spectrometry and only indigotin was detected. "JeansÏ refers to a speciÐc garment with respect to both the dye, indigo, and the garment cut ; from reference spectra of blue-dyed Ðbres and threads from garments, it is straightforward to observe by Raman microspectrometry the spectra of dyes Ðxed on threads without chemical pretreatment. On these supports, the spectrum of indigotin shows extra bands assigned to vibrational modes of symmetry, indicating a loss of the centro-B u symmetry of the molecule and an alteration of its planarity due to the dyeing process.
1997 by
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## Abstract The purpose of this study was to determine if dental calcified junctions (DEJs/CDJs) in human teeth contain different compositional phases compared to the adjacent dental calcified tissues. Peak positions and intensities were determined from micro‐Raman spectra for PO and the CH modes