Fig. 4.

Photograph images of the number of colonies observed with bacterial strain culture (E. coli MTCC 1302) plates media supplemented with AuNPs having

(a) 0 µg/ml, (b) 20 µg/ml, (c) 30 µg/ml, (d) 40 µg/ml, (e) 50 µg/ml, (f) 60 µg/ml concentrations