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Self-healing test on hydrogels Alg-Tyr-3APBA-Gel-d (top) and Alg-Tyr-Gel (bottom). (a) Hydrogels after 30 min at 37 °C. (b) t₀—hydrogels just cut and manually reattached. (c) Hydrogels after 10 min at 37 °C. (d) Application of a tensile stress on hydrogels to test self-healing.
