536291.fig.004a
(a)
536291.fig.004b
(b)
Figure 4: Swelling ratio of unloaded (a) and BSA-loaded (b) CS/DS nanoparticles in human and fetal bovine sera at various CS/DS weight ratios (CS 0.075% w/v, BSA 1 mg/mL, mean ± S.D, ). *Significantly different from the nanoparticles incubated in HS.