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. 2019 Jul 27;8(8):249. doi: 10.3390/antiox8080249

Figure 1.

Figure 1

Antioxidant capacity indicators of solid substances determined by the QUENCHER (The QUick, Easy, New, CHEap and Reproducible) method. Values represented as mean ± standard deviation (n = 4); the mean values followed by different letters and symbols are significantly different (p < 0.05) (ABTS: small letters for leaves (a–c) and for roots (d–e); DPPH•: capital letters are used for leaves (A–C) and for roots (D–E) and TPC–symbols are used for leaves (*, **, ***) and for roots (#, ##). TPC is expressed in mg GAE/g DWP; DPPH•, ABTS⁺• in μM TE/g DWP. The residues after methanol and water extraction are further referred to by abbreviations composed of mean residue (R), peony (P), leaves or roots (L—leaves, R—roots), and solvent (M—methanol, W—water); ASE and TR mean extraction type: accelerated solvent extraction and traditional extraction, respectively.