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. 2020 Oct 9;11:436. doi: 10.1186/s13287-020-01930-1

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© The Author(s) 2020

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Mechanical properties of hydrogels with different concentrations of PL. a Compressive stress-strain curve. b Young’s modulus calculated from A curves shows a significant increase in Alg with fresh-PL-20% (v/v) hydrogel compared with Alg hydrogel alone (* P ≤ 0.05). c Rheological measurements. d G′ and G″ calculated at 0.1% strain. The results showed significant higher elastic (G′) modulus in the Alg-PL hydrogels (all concentrations) compared with Alg hydrogel alone (* p ≤ 0.01), and viscous (G″) modulus were significantly higher in all the Alg-PL hydrogels (fresh ones) compared with Alg hydrogel alone (^#p ≤ 0.05) (n = 6)