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. Author manuscript; available in PMC: 2022 May 1.
Published in final edited form as: Curr Protoc. 2021 May;1(5):e124. doi: 10.1002/cpz1.124

Figure 5: Sample mechanical testing for alginate hydrogels with unconfined compression and shear rheology.

Figure 5:

(a) Sample unconfined compression test of ionically crosslinked alginate. Elastic modulus (stiffness) is measured as the slope of the stress-strain curve between 5% and 10% strain. For stress relaxation tests, strain is held at 15% until stress drops below one-half of the peak value. (b) Sample shear rheometer test of ionically crosslinked alginate. Storage and loss modulus are measured until the values reach equilibrium. Gel is deposited into the rheometer just before time t = 0s.