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. 2018 Dec 25;19(1):66. doi: 10.3390/s19010066

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© 2018 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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Spectrophotometric measurements obtained using an ABTS radical assay: (a) ABTS with addition of the blank and (b) ABTS with a lager beer sample added.