Table 2.

Efficiency of silk fibroin solution sterilization. Percent recovery of the silk fibroin solution following sterile filtration through a 0.22 μm syringe filter. Time labels denote the silk fibroin boil time.

Conc. (wt%)	5 min	10 min	15 min	30 min	45 min	60 min
0.5	0	13.4 ± 2.6	15.2 ± 0.8	84.2 ± 3.8	n/a	n/a
1	0	0	6.9 ± 4.9	78.3 ± 9.5	n/a	n/a
2	0	0	3.7 ± 3.3	44.2 ± 3.8	n/a	n/a
4	0	0	0	27.7 ± 5.5	90.0 ± 6.6	95.0 ± 0.0