(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

Figure 2: MPs aspect and morphology for formulations indicated: (a) F1; (b) F2, elaborated with Eudragit RSPO; (c) F5; (d) F7; (e) F8; (f) F9; (g) E3; (h) blank particles and, (i) TEM image of magnetite employed.