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Scanning electron micrographs of piroxicam formulations.A) Piroxicam:ERS nanoparticles at the ratios of 1:2.5. B) Piroxicam:ERS nanoparticles at the ratios of 1:10. C) TreatedERS. D) Treated piroxicam. Bar equals to 2 mm. ERS:Eudragit®RS100. The image was adopted with permission from (Adibkia et al. 2007b).
