Fig. 1From: Biosynthesis and bioactivities of metal nanoparticles mediated by Helichrysum aureonitensPossible chelating coordination sites ((3–4) and (4–5)) for the isolated flavone (3,5-dihydroxy-6,7,8-trimethoxyflavone). Mn+ denotes metal ions, which can be either Ag+ or Zn2+Back to article page