Uniform Chitosan Microparticles Prepared by a Novel Spray-Drying Technique

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).

(a)

(b)

(c)

(d)

(e)

(f)