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. 2019 Jul 30;9(3):95. doi: 10.3390/bios9030095

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© 2019 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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Schematic representation of sensors (Panel A) and the main designs of starch-based hydrogel biosensors (Panel B) (n = 4) analyzed in this study. B1: Pt_c/[GEL(5%) + GOx]₅/PPD; B2: Pt_c/[GEL(5%) + PEI(1%) + Gox]₅/PPD; B3: Ptc/[GEL(5%) + GLY(1%) + Gox]₅/PPD; B4: Pt_c/[GEL(5%) + PEI(1%) + GLY(1%) + Gox]₅/PPD. Ptc: Pt cylinder 1 mm long, 125 μm diameter; GEL: starch-based hydrogel; Gox: D-glucose oxidase; PPD: poly-ortho-phenylenediamine; PEI: polyethyleneimine; GLY: glycerol. In brackets: the concentration of the component.