Band-blot test of polyphenols present in propolis using the stable free radical DPPH·. Chromatogram obtained after spraying the layer (applied polyphenol standard mixture bands in the range from 45 (track 1) to 10 μg/mL (track 8)) with 0.3 mM solution of DPPH· radical. AOE of standard mixture is 1.89 (H = 1.89c + 22.856, r2 = 0.974) .
Medić-Šarić et al. Nutrition Journal 2009 8:33 doi:10.1186/1475-2891-8-33