Kinetics of HA hydrogel formation. 37 °C, γ = 5%, f = 1 Hz, coaxial cylinder geometry (10 mm). Solid line: G′, dashed line: G″, red line: concentration 1%, blue line: concentration 2%, green line: concentration 3%. a)100 kDa HA, no data are reported for the 1% concentration because the sol-gel transition was not observed in this case. b) 470 kDa HA, c) 810 kDa HA, d) 1700 kDa HA. e) Effect of MW and concentration on the gel time (n = 2); f) effect of MW and concentration on the elastic modulus (n = 2).