Fig. 6From: Biosynthesis and bioactivities of metal nanoparticles mediated by Helichrysum aureonitensDPPH radical scavenging activity of H. aureonitens extract, flavone and nanoparticles (AgNPs and ZnONPs) synthesized using H. aureonitens extract and isolated flavone. Ascorbic acid, tocopherol and butylated hydroxytoluene (BHT) were used as controls. Different alphabets indicate mean separation by Turkey’s post hoc test (p < 0.05)Back to article page