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. 2014 Nov 27;14(12):22552–22563. doi: 10.3390/s141222552

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Figure 5. — Peak area of subband components of PDL Raman spectrum in the Amide I region, as a function of the orthodontic treatment time, for α-helix (a); random coil (b); and β-sheet mode (c). The data are normalized to the Amide I mode total area.