Fig. 1From: Intranasal immunization with O-2′-Hydroxypropyl trimethyl ammonium chloride chitosan nanoparticles loaded with Newcastle disease virus DNA vaccine enhances mucosal immune response in chickensCharacterization of the O-2ʹ-HACC/pFDNA. A TEM image of the O-2ʹ-HACC/pFDNA; B SEM image of the O-2ʹ-HACC/pFDNA; C FT-IR spectroscopy of the O-2ʹ-HACC/pFDNA; D AFM image of the O-2′-HACC/pFDNA; E Particle size of O-2′-HACC/pFDNA; F Zeta potential of O-2′-HACC/pFDNABack to article page