A Green Approach for the Synthesis of Silver Nanoparticles Using Ultrasonic Radiation’s Times in Sodium Alginate Media: Characterization and Antibacterial Evaluation

Table 1

Average inhibition zone for antibacterial activity of the Alg/Ag-NPs after different irradiation times.

Bacteria	Inhibition zone (mm)						Control negative (mm)	Control positive (mm)
	A0	A1	A2	A3	A4	A5	Na-Alg	STM
B. subtilis (B29)	9.8	18.1	18.3	18.8	19.1	20.9	NA	20.7
S. aureus (S276)	8.3	8.3	8.4	8.6	9.5	9.8	NA	23.6
E. coli (E266)	8.9	8.9	9.0	9.1	9.5	9.7	NA	21.8
S. choleraesuis (ATCC10708)	8.5	8.7	8.8	8.9	9.2	10.6	NA	19.3

Note. Mean standard deviation values for the AgNO₃/Na-Alg ± 0.26 mm, B. subtilis ± 0.57 mm, S. aureus ± 0.24 mm, E. coli ± 0.25 mm, and S. choleraesuis ± 0.22 mm for AgNO₃/Na-Alg, 60, 120, 240, 480, and 720 min for A0, A1, A2, A3, A4, and A5 after ultrasonic irradiation.
NA, not appearing; B. subtilis, Bacillus subtilis; S. aureus, Staphylococcus aureus; E. coli, Escherichia coli; S. choleraesuis, Salmonella choleraesuis; STM, streptomycin.