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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Biomaterials. 2014 Feb 1;35(12):3766–3776. doi: 10.1016/j.biomaterials.2014.01.026

Figure 4.

Figure 4

Representative SEM images of in vitro PTK-UR degradation. Freshly made scaffolds (left column), scaffolds incubated in PBS for 25 weeks (middle column), and scaffolds incubated in 20% H2O2 media for 10 days (right column). Scale bars = 231 µm. The ROS-degraded PTK-URs feature more irregular pore morphology and surface pitting while PBS-incubated scaffolds appear unchanged relative to freshly made scaffolds.