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. 2020 Feb 21;10:3205. doi: 10.1038/s41598-020-60196-y

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© The Author(s) 2020

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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Scaffold macro-morphological characterisation and resolution assessment. (a) Scaffold filament diameter at different speed and alginate concentration with volume integration: 11% (green), 9% (purple), 7% (orange); (b) Printed scaffolds with 11% of alginate concentration under (left panel) and over (right panel) the minimum speed (6 mm/s). (c) same as (b) for printed scaffolds with 9% of alginate concentration and minimum speed of 10 mm/s. (d) same as (b) for printed scaffolds with 7% of alginate concentration and minimum speed of 14 mm/s. (e) Example of validation tests of printed corners at 60°, 45° and 30°:.STL file (left panel); printed trajectory (right panel). (f) Example of validation tests of printed drops:.STL file (left panel); printed trajectory (right panel). Wilcoxon sign rank test was performed and statistical significance was set at p < 0.05. Data are represented as median ± discrepancy.