Antioxidant and Anticholinesterase Potential of Six Thymus Species

Table 2

DPPH radical scavenging effects of Thymus ethanolic extracts, polyphenolic compounds, and reference antioxidant.

Samples	DPP scavenging activity (%) ± SD
	0.39 μg/mL	0.78 μg/mL	1.56 μg/mL	3.13 μg/mL	6.25 μg/mL	12.5 μg/mL	25 μg/mL
T. longicaulis	12.82 ± 3.02^a	17.74 ± 1.51^a	27.78 ± 0.60^a	51.71 ± 0.03^a	84.62 ± 3.02^a	87.18 ± 0.09^a	87.82 ± 1.51^a
T. praecox subsp. polytrichus	10.84 ± 2.73^a,b	13.52 ± 2.12^b	27.68 ± 2.12^a	47.00 ± 2.73^b	83.69 ± 0.61^a	86.70 ± 0.58^a	86.70 ± 0.61^a,b
T. pulegioides	8.61 ± 1.87^a,c	12.25 ± 0.05^b	20.20 ± 0.94^b	38.58 ± 0.23^c	73.18 ± 0.94^b	83.94 ± 0.23^a,b	87.25 ± 1.64^a
T. serpyllum subsp. serpyllum	2.05 ± 0.48^d	8.39 ± 2.18^c	11.13 ± 0.24^c	22.95 ± 4.36^d	52.23 ± 4.12^c	82.02 ± 1.70^b,c	84.42 ± 0.73^b
T. striatus	7.05 ± 1.25^b,c,d	9.91 ± 0.93^b,c	19.82 ± 1.87^b	40.53 ± 0.62^c	75.11 ± 0.31^b	86.34 ± 2.49^a	87.67 ± 0.03^a
T. vulgaris	4.75 ± 0.65^c,d	6.58 ± 1.42^c	14.90 ± 1.01^d	29.56 ± 0.26^e	55.27 ± 0.69^c	79.73 ± 0.27^c	80.95 ± 0.13^c
Rosmarinic acid	37.45 ± 2.07^e	56.49 ± 1.78^d	89.12 ± 0.02^e	93.10 ± 0.30^f	94.98 ± 0.02^d	94.98 ± 0.09^d	95.19 ± 0.30^d
Luteolin	25.00 ± 1.61^f	50.19 ± 1.87^e	82.01 ± 0.80^f	84.47 ± 1.07^g	84.85 ± 0.14^a	85.80 ± 1.87^a	87.12 ± 1.61^a
Trolox	18.98 ± 2.82^g	24.44 ± 0.13^f	47.19 ± 2.64^g	87.22 ± 0.60^g	93.98 ± 0.03^d	95.68 ± 0.29^d	96.62 ± 0.02^d

Mean values in the same column followed by different letters are significantly different from each other ().