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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Fluorescent spectra measured with a confocal microscope from the H2-DCFDA probe inside (a) E. coli and (b) A. flavus cells after incubating with different samples.