267218.fig.009a
(a)
267218.fig.009b
(b)
267218.fig.009c
(c)
267218.fig.009d
(d)
Figure 9: SEM photographs microparticles prepared with solutions of different chitosan lactose ratio (w/w): (a) no lactose, (b) 18 : 1, (c) 12 : 1, and (d) 6 : 1 (chitosan concentration 1.5%, storage time 0 day).