Fig. 3
From: Evaluation of microbial shifts caused by a silver nanomaterial: comparison of four test systems
Effect of the silver nanomaterial NM-300K on microbial exoenzyme activity. Statistical significance (α = 0.05) is indicated on the bars representing inhibition: *0.01 ≤ p < 0.05; **0.001 ≤ p < 0.01; ***p < 0.001