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. 2020 Jul 8;10(7):75. doi: 10.3390/bios10070075

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© 2020 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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The biosensor performance for detecting lactate concentration (a) The outputting piezoelectric voltage of the biosensor (modified with lacticoxidase (LOx)) against different lactate concentration from 0 to 8 mmol/L (45°). (b) The outputting piezoelectric voltage of the biosensor (modified LOx) in pure water (45°). (c) Outputting piezoelectric voltage of the biosensor (unmodified with LOx) against different lactate concentration from 0 to 8 mmol/L. (d) The outputting piezoelectric voltage and response of the three devices.