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. 2014 Feb 21;14(2):3675–3689. doi: 10.3390/s140203675

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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/3.0/).

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Figure 2. — (A) Interferometric Optical Detection Method (IODM) considering I_Out and I_Ref of f_TRANS as their corresponding Optical Power (P_Out, P_Ref) for a given wavenumber range [wn_a, wn_b] highlighted in blue. (B) Description of IODM particularized for a given wavenumber. (C) Theoretical response of the Increased Relative Optical Power (IROP) as a function of the biofilm thickness and (D) a detail of the IROP for molecules of small molecular mass.