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. 2022 Jun 9;22:230. doi: 10.1186/s12903-022-02263-6

Fig. 11.

Fig. 11

Petri dishes of L. acidophilus of the 4 groups, T1: immediately after coating and T2: post 3 months test (1 = control group, 2 = Ag coated group, 3 = ZnO coated group and 4 = Ag/ZnO coated group)