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. 2020 Aug 18;11:2041731420945633. doi: 10.1177/2041731420945633

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© The Author(s) 2020

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 3. — Turbidity curves of type I collagen fiber self-assembly in vitro as a function of thickness for (a) COLL-HA, (b) COLL-PEG₂₀₀₀, and (c) COLL-PEG₃₃₅₀ semi-IPNs (straight lines) and (a) COLL-HA, (b) COLL-PEG₂₀₀₀, and (c) COLL-PEG₃₃₅₀ gels after diluting 9 parts (v/v) polymer solutions with 1 part (v/v) culture medium (dashed lines). We averaged six replicates/group and showed the mean curves. TEM images of (d) COLL-HA, (e) COLL-PEG₂₀₀₀, (f) COLL-PEG₃₃₅₀ semi-IPNs, for 1.25- and 5.10-mm-thick samples. The red triangles indicate the peculiar D-periodicity of collagen. Scale bars = 1 μm.