Fig. 4

XRD patterns of (A) Roflumilast, (B) L-arginine, (C) (PLA/PVA), (D) (PLA-Roflumilast/PVA), (E) (PLA/PVA-L-arginine), and (F) (PLA-Roflumilast/PVA-L-arginine).

XRD patterns of (A) Roflumilast, (B) L-arginine, (C) (PLA/PVA), (D) (PLA-Roflumilast/PVA), (E) (PLA/PVA-L-arginine), and (F) (PLA-Roflumilast/PVA-L-arginine).