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Biosynthesis of silver nanoparticles. Plant-mediated method (A) after dissolving C. longa powder in ddH2O, the solution was filtered to remove the majorities of vegetal debris; finally, silver nitrate was added and the change in colour was monitored. Bacterial supernatant method (B). After growing E. coli ATCC® 25922 in Mueller-Hinton broth, the supernatant was collected, and silver nitrate was added to induce nanoparticle synthesis.
