Antioxidant and Anticholinesterase Potential of Six Thymus Species

Table 3

NO radical scavenging effects of Thymus ethanolic extracts, polyphenolic compounds, and reference antioxidant.

Samples		N scavenging activity (%) ± SD
	6.25 μg/mL	12.5 μg/mL	25 μg/mL	50 μg/mL	100 μg/mL	200 μg/mL	400 μg/mL
T. longicaulis	7.29 ± 1.05^a	15.47 ± 1.28^a	29.62 ± 2.75^a	44.17 ± 1.47^a	57.64 ± 1.10^a	72.25 ± 0.11^a	75.01 ± 0.95^a
T. praecox subsp. polytrichus	na	0.23 ± 0.03^b	10.16 ± 0.46^b	26.03 ± 1.52^b	43.02 ± 1.72^b	60.77 ± 0.13^b	68.22 ± 0.03^b
T. pulegioides	0.37 ± 0.05^b	11.64 ± 0.90^c	29.40 ± 1.10^a	44.58 ± 2.19^a,g	58.01 ± 0.37^a	70.40 ± 0.46^a	70.89 ± 1.54^c
T. serpyllum subsp. serpyllum	na	na	2.73 ± 1.46^c	16.38 ± 1.20^c	37.08 ± 1.66^c	53.92 ± 1.26^c	62.38 ± 0.80^d
T. striatus	7.73 ± 0.78^a,c	21.19 ± 0.98^d	28.73 ± 2.16^a	39.76 ± 2.04^d	52.17 ± 1.17^d	63.24 ± 2.19^b	66.12 ± 1.26^e
T. vulgaris	2.16 ± 0.82^b	14.96 ± 1.23^a,c	24.42 ± 0.35^d	39.02 ± 0.72^d	50.52 ± 0.74^d	60.96 ± 1.17^b	63.73 ± 0.55^d
Rosmarinic acid	10.86 ± 3.09^c	47.20 ± 0.23^e	58.40 ± 2.23^e	68.19 ± 0.27^e	73.75 ± 0.33^e	76.23 ± 0.76^d	77.22 ± 0.21^f
Luteolin	1.57 ± 0.21^b	43.10 ± 3.95^f	57.64 ± 2.75^e	64.34 ± 0.62^f	70.95 ± 1.92^f	76.25 ± 1.06^d	80.31 ± 0.30^g
Trolox	na	5.87 ± 1.20^g	20.06 ± 0.02^f	47.39 ± 0.14^g	80.70 ± 0.54^g	83.62 ± 0.62^e	84.86 ± 1.23^h

na: no activity. Mean values in the same column followed by different letters are significantly different from each other ().