Eco-friendly methods for obtaining silver nanoparticles from blueberries fruits extract and bioactivity properties

I.R. Suica-Bunghez, A.A. Sorescu, M. Calin, R.M. Ion

National R&D Institute for Chemistry and Petrochemistry, ICECHIM-Romania

 

The phytosynthesis of metallic nanoparticles represents an interesting domain of research, with promising perspectives especially in medicine and food protection, due to antioxidant and antimicrobial activity. A special area represents biosynthesis of nanoparticles by vegetable materials. In the present research, synthesis of silver nanoparticles was obtained through a simple method, using blueberry fruit. The AgNPs were formed by reaction of biomass of blueberries hydroalcoholic extract with aqueous solutions of AgNO3 at room temperature and dark conditions. The synthesized nanoparticles were confirmed by UV–visible spectroscopy, optical microscopy and dynamic light scattering. To demonstrate the beneficial components of blueberry fruits, the extract was quantitative (polyphenols, flavonoids) and qualitative (alkaloids, carbohidrates, terpenoids, etc) characterized. The absorption spectra of silver phyto-nanoparticles were recorded after preparation and exhibited absorbance peaks between 450-500 nm. The antioxidant activity (AA%) of fruit extract and AgNP sample was evaluated using DPPH method. AA% showed an increase at AgNP sample compared to the extract. The antimicrobial activity of AgNP sample was tested on C. albicans and C. parapsilolis yeasts and it was resulted a good activity.

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