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. 2021 Apr 23;13(9):1382. doi: 10.3390/polym13091382

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© 2021 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 (https://creativecommons.org/licenses/by/4.0/).

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Effect of (a) SPS and (b) Ru(bpy)₃ concentrations on gelation time of 1%(w/v) chitosan-Ph solutions under irradiation of visible light (3.18 W/m² @ 452 nm, Figure S1). The concentrations of (a) Ru(bpy)₃ and (b) SPS were fixed at 1 and 4 mM, respectively. Bars: mean ± SD (n = 10).