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. 2017 Mar 27;7:436. doi: 10.1038/s41598-017-00594-x

Figure 1.

Figure 1

Characterization of acid- and alkali-treated EM. SEM images of EM treated for 72 hours with aqueous solutions of different pH values: (A) pH = 3; (B) DDH2O; and (C) pH = 11 (n = 3).