FIG. 9.

State of collagen hydrogel characterization. Each object represents the fabrication parameter ranges covered by a single experimental study from the literature. Log(collagen concentration) and polymerization pH are plotted as radius and angle, respectively. Polymerization temperature is plotted as a color contour. Studies outside the ranges (0–100) mg/mL, (5–11) pH units, and (0–37) °C are not shown. Diffusing-molecule hydrodynamic radius and deformation mode for mechanical characterization are not represented in this figure. Color images available online at www.liebertpub.com/teb