Comparison of the Free Radical Scavenging Activity of Six Iranian Achillea. Species

Figures & data

Figure 1 Radical scavenging activity of the studied Achillea. species extracts using DPPH. Each point represents the mean of three experiments, and the vertical bars represent the SEM.

Table 1 IC₅₀ values of DPPH scavenging activity and total flavonoid contents (TFCs) of the studied Achillea. extracts.

Plant species	IC50 (µg/ml),^‡	TFC (µg/mg)^†,^‡
A. filipendula.	60.32 (57.16–63.66)^a.	39.04 ± 0.66^a.,b.
A. micrantha.	32.92 (29.56–36.66)^b.	40.68 ± 0.71^b.
A. millefolium.	49.43 (46.41–52.64)^c.	42.46 ± 1.46^b.
A. tenuifolia.	85.62 (80.45–91.11)^d.	35.66 ± 0.83^a.
A. vermicularis.	85.28 (80.07–90.82)^d.	58.17 ± 0.82^c.
A. wilhelmsii.	118.90 (108.80–130.0)^e.	55.96 ± 0.61^c.

Note.: The IC₅₀ value of the positive control, rutin, was measured as 6.36 (6.15–6.59) µg/ml.

*The IC₅₀ values are presented with their respective 95% confidence limits.

^†The TFC values are means ± SEM of three determinations.

^‡Letters (a.–e.) denote homogenous subsets at p < 0.05 (Tukey's post test).

Figure 2 Total flavonoid contents of the studied Achillea. extracts. Data are represented as mean ± SEM (n = 3). Vertical bars represent the SEM.