267218.fig.005a
(a)
267218.fig.005b
(b)
267218.fig.005c
(c)
267218.fig.005d
(d)
267218.fig.005e
(e)
267218.fig.005f
(f)
Figure 5: SEM photographs and size distribution of chitosan microparticles prepared with different chitosan concentrations: (a), (d) 0.5 wt%; (b), (e) 1.0 wt%; (c), (f) 1.5 wt% (storage time: 0 day).