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. 2018 May 18;9:1987. doi: 10.1038/s41467-018-04303-8

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© The Author(s) 2018

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. 7 — Stepwise and reversibly controlled release and capture of α-CD by Mg-CP in quasi-solid state. a Photograph of the polyacrylamide hydrogel. b Photograph of Mg-CP⊃α-CD incorporated into the polyacrylamide hydrogel. c A pictorial representation of Mg-CP⊃α-CD in the polyacrylamide hydrogel. d Temperature-dependent changes in the ICD spectra of the polyacrylamide hydrogel. e Temperature-dependent changes in the ICD spectra of the Mg-CP⊃α-CD entrapped polyacrylamide hydrogel. Changes in the ICD spectrum at 350 and 420 nm are represented by magenta and cyan lines, respectively. f Stepwise release profile of α-CD from Mg-CP monitored at 350 and 420 nm in the hydrogel at different temperatures. g Reversible binding (black arrow) and release (blue arrow) of α-CD from Mg-CP incorporated into the hydrogel