. 2018 Apr 24;14:69–77. doi: 10.1016/j.bbrep.2018.04.004

Table 1.

In-vitro antibacterial studies of bacteria present in drinking water PVC pipelines using Alstonia scholaris Zinc oxide nanoparticles as inhibitors.

S.no	Bacteria	Alstonia scholaris stem bark extract mediated synthesis of zinc oxide nanoparticles Zone of inhibition (mm)
		170 ± 1.4 ppm	100 ± 1.1 ppm	50 ± 0.9 ppm
1.	Sphingo bacterium thalpophilum	1.5 ± 0.04^cd	1.3 ± 0.01^cd	0.9 ± 0.05^de
2.	Uncultured organism clone	1.4 ± 0.05^cdef	1.0 ± 0.06^ef	0.8 ± 0.03^def
3.	Ochrobactrum sp	1.2 ± 0.08^f	1.1 ± 0.05^def	0.7 ± 0.02^efg
4.	Uncultured Achromobacter sp	1.9 ± 0.09^b	1.7 ± 0.14^a	1.2 ± 0.05^bc
5.	Uncultured bacterium clone	1.6 ± 0.04^c	1.4 ± 0.06^bc	0.9 ± 0.02^de
6.	Sphingobacterium sp	1.5 ± 0.05^cde	1.2 ± 0.03^cde	1.0 ± 0.02^cd
7.	Acinetobacter sp	3.0 ± 0.07^a	2.2 ± 0.14^a	1.6 ± 0.18^a
8.	Uncultured soil bacterium	2.2 ± 0.03^a	1.7 ± 0.15^a	1.2 ± 0.16^bc
9.	Ochrobactrum sp	2.6 ± 0.08^a	2.1 ± 0.17^a	1.5 ± 0.24^a
10.	Uncultured bacterium	2.0 ± 0.05^ab	1.6 ± 0.03^ab	0.8 ± 0.05^defg
	C.R.D (P ≤ 0.05)	0.227	0.217	0.207

The data presented is ± SE of three measurements.

Data followed by the same letter are not significantly different at P ≤ 0.05, where as those followed by different letters are significantly different at P ≤ 0.05.