Extracellular Biosynthesis of Silver Nanoparticles Using
Escherichia coli ATCC 8739, Bacillus subtilis ATCC 6633, and
Streptococcus thermophilus ESh1 and Their Antimicrobial Activities
Figure 2
(a, b, and, c) show UV-Visible spectrum of silver nanoparticles produced by filtrate E. coli, B. subtilis, and St. thermophilus.