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. 2018 Apr 6;9:688. doi: 10.3389/fmicb.2018.00688

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Copyright © 2018 Cieplik, Steinwachs, Muehler, Hiller, Thurnheer, Belibasakis, Buchalla and Maisch.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Photosensitizers (PS)-uptake measurements. Spectrophotometrical evaluation of PS-uptake for (A) SAPYR and (B) Methylene Blue. Gray dotted lines show absorption spectra of the PS solutions (100 μM), while green solid lines show absorption spectra of the supernatants of bacteria incubated with the respective PS (neon green: Actinomyces naeslundii; yellowish green: Fusobacterium nucleatum; dark green: Porphyromonas gingivalis).