Fig. 3

FTIR spectra of (A) PLA, (B) PVA, (C) Roflumilast, (D) L-arginine, (E) (PLA/PVA), (F) (PLA-Roflumilast/PVA), (G) (PLA/PVA-L-arginine), and (H) (PLA-Roflumilast/PVA-L-arginine) NFs.

FTIR spectra of (A) PLA, (B) PVA, (C) Roflumilast, (D) L-arginine, (E) (PLA/PVA), (F) (PLA-Roflumilast/PVA), (G) (PLA/PVA-L-arginine), and (H) (PLA-Roflumilast/PVA-L-arginine) NFs.