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FTIR spectra of the biosynthesized silver nanoparticles. FTIR spectrum of silver nanoparticles synthesized by extracellular agents of Bacillus pumilus, B. persicus, and B. licheniformis, after 48 h of incubation. The bands seen at 3372, 2359, and 1650–1000 cm−1 correspond to (A): the stretching vibrations of primary amines, (B): C = O extend vibrations of carboxylic acids, aldehydes, and ketones, and (C): methylene scissoring vibrations, respectively.
