Extracellular Biosynthesis of Silver Nanoparticles Using
Escherichia coli ATCC 8739, Bacillus subtilis ATCC 6633, and
Streptococcus thermophilus ESh1 and Their Antimicrobial Activities
Figure 3
(a, b, and, c) show X-ray powder diffraction of silver nanoparticles produced by E. coli, B. subtilis and St. thermophilus, respectively.