Biosynthesis of red cabbage extract directed Ag NPs and their effect on the loss of antioxidant activity

Plant extracts contain sources of antimicrobial and antioxidant compounds that have been used as a reducing and stabilizing agents for biosynthesis of nanoparticles (NPs). Some studies suggest that plant extracts incorporating directed NPs, such as Ag, enhanced antioxidant activity, this study sugge...

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Bibliographic Details
Published in:Materials letters 2016-09, Vol.179, p.20-23
Main Authors: Demirbas, Ayse, Welt, Bruce A., Ocsoy, Ismail
Format: Article
Language:English
Subjects:
Ag NP
Anthocyanins
Antioxidant activity
Antioxidants
Biosynthesis
Extraction plants
Green synthesis
Nanoparticle
Nanoparticles
Nanosize
Particles
Plants (organisms)
Scanning electron microscopy
Silver
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Summary:Plant extracts contain sources of antimicrobial and antioxidant compounds that have been used as a reducing and stabilizing agents for biosynthesis of nanoparticles (NPs). Some studies suggest that plant extracts incorporating directed NPs, such as Ag, enhanced antioxidant activity, this study suggests the opposite. Red cabbage extract with silver NPs (Ag NPs) was prepared to study and how silver ions (Ag+) and Ag NPs influence antioxidant activity of red cabbage anthocyanin. Synthesized Ag NPs were characterized by UV–vis spectra, scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX). We studied Ag NPs formation as a function of Ag+ and anthocyanin concentrations. Results show that Ag+ and Ag NPs decreased antioxidant activity of anthocyanin towards DPPH. [Display omitted] •Green synthesis.•Red cabbage extract.•The biosynthesis of size controlled Ag NPs.•Antioxidant activity.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.05.056