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Surface-modified magnetite nanoparticles (MNPs) were synthesized by co-precipitation of aqueous solution of ferrous and ferric salts (molar ratio 1:2) upon adding a base followed by calcium salt of poly(γ-glutamic acid) (Ca-γ-PGA) for uniform coating on the surface of MNPs. Both uncoated and Ca-γ-PGA-coated MNPs were characterized using various techniques including Fourier transform infrared spectroscopy...
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