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. 2016 Dec 29;22(1):50. doi: 10.3390/molecules22010050

Figure 4.

Figure 4

Photographs of EPS-AgNP dispersions at pH 4.0, pH 5.5, pH 7.0, and pH 8.0 after stored at room temperature for 2 months. (AgNP formation did not occur at pH = 4 for EPS fractions P0.5 and P2.0).