Biogenic silver nanoparticles using seaweed Ulva rigida and their fungicidal and cytotoxic effects

الملخص EN

In this paper we describe the biosynthesis of silver nanoparticles (Ag-NPs) using the macroalga Ulva rigida aqueous extract.

The UV-vis spectra of aqueous medium containing Ag+ ions showed peak at 380 nm corresponding to the plasmon resonance of Ag-NPs.

Transmission Electron Microscope (TEM) analysis showed formation of well dispersed Ag-NPs with average size of 6.4 nm.

Fourier Transform Infrared Spectroscopy (FT-IR) analysis revealed the involvement of protein molecules in the formation of nanoparticles.

The capping ligand of the biogenic Ag-NPs may be an aromatic compound.

Antifungal potency of Ag-NPs synthesized by Ulva rigida was reported using various human pathogenic fungal strains.

The fungal pathogen Aspergillus fumigates was highly suppressed.

A significant difference in antifungal potency was noted between the crude extract of U.

rigida and the biogenic Ag-NPs.

Cytotoxicity was assayed by brine shrimp Artemia salina.

The cytotoxic effect of biogenic Ag-NPs displayed LC50 of 450 μl (≡4.5 μg / ml) against Artemia salina.