Uniform Chitosan Microparticles Prepared by a Novel Spray-Drying Technique

Figure 6

SEM photographs of chitosan microparticles prepared with different chitosan concentrations: (a) 0.5 wt%; (b) 1.0 wt%; (c) 1.5 wt% (storage time: 18 days).

(a)

(b)

(c)