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. 2016 Jun 30;6(3):32. doi: 10.3390/bios6030032

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© 2016 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 (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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A cyclic voltammogram of a bare electrode (a) without being soaked in methylene blue; and (b) soaked in methylene blue (0.1 M of MB, in 10 ppm of formaldehyde).