As the CNP concentration increased, the antioxidant capacity showed an increasing trend in Figure 2 , demonstrating that CNPs had a powerful antioxidant capability, but the effect of the high concentration of CNPs on cells needs to be explored. 3.3.
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Colloidal Nanoparticles Isolated from Duck Soup Exhibit Antioxidant Effect on Macrophages and Enterocytes.
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However, when the concentration of CNPs gradually increased; as can be seen from Figure 3 , the cell activity showed a trend of decline. 3.4.