Figure 6From: Toxicity of various silver nanoparticles compared to silver ions in Daphnia magnaPhotograph comparing appearance of aqueous stocks of nanoparticles (400 mg/L) used for toxicity tests. A: nAg1 colloid; B: nAg2 colloid; C: suspensions of nAg3 before (left) and after (right) 24 hours.Back to article page