216137.fig.005a
(a) P4HB fiber  d
216137.fig.005b
(b) P4HB fiber  d
216137.fig.005c
(c) P4HB fiber 12 weeks p.op.
216137.fig.005d
(d) P4HB fiber 12 weeks p.op.
Figure 5: SEM photomicrograph showing the surface of a P4HB monofilament fibers: (a) P4HB fiber size 1 before incubation in 2 M HCl, (b) after incubation in 2 M HCl for 7 d, (c) and (d) P4HB monofilament size 3–0 after being implanted subcutaneously in rabbits for 12 weeks.