Figure 1 of Chaiyasan, Mol Vis 2015; 21:1224-1234.

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.