Fig. 2.

a Dynamic viscosity (with the constant shear rate (CSR)) for 4 parallel samples of the silica sol-DMEM-FBS-NaOH mixture after the mixing (0–6 min) and during the foaming (6–11 min at 24–28 °C); b damping factor (loss tangent) vs. follow-up time at 1 rad/s and 37 °C (without cells); c complex modulus and the linear trend line vs. follow-up time at 1 rad/s and 37 °C