535796.fig.002
Figure 2: The absorption spectrum of AgNPs synthesized by B. funiculus culture supernatant. The absorption spectrum of AgNPs exhibited a strong broad peak at 420 nm, and observation of such a band is assigned to surface plasmon resonance of the particles. The samples were collected and were incubated with 1 mM silver nitrate solution. After the incubation period, the samples were visualized in UV-vis spectra.