. 2019 Apr 26;10:820. doi: 10.3389/fmicb.2019.00820

Table 1.

Effect of contact time of AgNPs on the antibacterial activity against Acidovorax oryzae strain RS-2.

Contact time (h)	Bacterial survival (log₁₀ CFU/ml)
	Control	AgNPs^a
0.0	8.19 ± 0.010 a^b	8.19 ± 0.010 e
1.5	8.18 ± 0.013 a	6.78 ± 0.089 d
3.0	8.16 ± 0.012 a	4.51 ± 0.056 c
6.0	8.12 ± 0.022 a	4.03 ± 0.024 b
12.0	8.09 ± 0.027 a	3.12 ± 0.041 a

^aConcentration of AgNPs solution was 20 μg/ml. ^bData from the two repeated experiments with six replications were pooled because there was no significant difference between repeat experiments. Means in a column followed by the same letter are not significantly different according to the LSD test (P ≤ 0.05).