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. 2017 Oct 17;8:1003. doi: 10.1038/s41467-017-01101-6

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Reaction of ABEI/Co²⁺/CS hydrogels with H₂O₂ at different times. a Optical images using a digital camera. H₂O₂ solution was fully mixed with ABEI/Co²⁺/CS hydrogels in vial A and H₂O₂ solution was directly added into ABEI/Co²⁺/CS hydrogels without agitation in vial B. All the images are coded according to the same intensity scale. b, c CL intensity as a function of time for vial A and B, respectively. For ABEI/Co²⁺/CS hydrogels, 40 mM 1.5 ml ABEI, 1 mM 0.6 ml Co²⁺, 15 ml CS dispersed in alkaline solution. Reaction condition: 1 ml 0.1 M H₂O_2, 1 ml hydrogels