Fig. 2

Changing the color of the culture medium in 19 different runs designed with different components of the culture medium. The change in the color of the culture medium to brownish-black indicates an increase iron uptake by strain ASFS1. The result of increase for iron uptake by this strain is to increase the synthesis of magnetic nanoparticles. The result of increase for iron uptake by this strain is to increase the synthesis of magnetic nanoparticles.