Preparation, characterization, and food application of rosemary extract-loaded antimicrobial nanoparticle dispersions

Rosemary extract (RE) was nanoencapsulated with the natural antimicrobial polysaccharide chitosan and γ-poly glutamic acid (γ-PGA) to improve the antimicrobial activity of RE. Three types of RE nanoparticles (RENPs) were generated with different chitosan concentrations (0.1–1.8 mg/mL) and particle sizes (200–600 nm). Nanoencapsulation significantly increased the antimicrobial activity of RE against Bacillus subtilis, and the highest activity was...