Figure 3.
Alginate concentration has different effects on shear modulus (G) and critical strain (γc) pre- and post-ionic crosslinking. (A,B) Shear modulus (G) of UV-crosslinked and UV + Ca crosslinked gels as function of alginate concentration. (C) Dependence of the loss tangent (tanδ) at ν = 1.0 Hz of covalent (UV) and covalent + ionic (UV + Ca) gels obtained from frequency sweep tests over different alginate concentrations. (D,E) Critical strain, γc, of UV-crosslinked and UV + Ca crosslinked gels as function of alginate concentration. Experimental conditions: GelMA, 5.5% w/v; alginate, 0–3% w/v; LAP, 0.1% w/v; human platelet lysate, 50% v/v. All frequency sweep and stress sweep measurements were performed at T = 37 °C, n = 3. Data are reported as mean ± s.d.