Figure 1. Scanning electron micrograph of lutein-loaded chitosan–dextran sulfate nanoparticles (LCDNs) obtained by formulation with
PEG-400 and EDC (LCDN-PE). This was prepared by mixing chitosan (CS): dextran sulfate (DS) ratio of 1:1.67 (by weight), 0.001%
w/v 1-ethyl-3-(3- dimethylaminopropyl)-carbodiimide hydrochloride (EDC), and 0.35% v/v polyethylene glycol-400 (PEG-400) with
0.005% v/v lutein aqueous solution. The particles show a spherical shape with uniform particle size distribution. Images for
all other formulations showed similar morphology.