Antioxidant and Anticholinesterase Potential of Six Thymus Species

Table 4

Ferric reducing power of Thymus ethanolic extracts, polyphenolic compounds, and reference antioxidant.

Samples	Absorbance at 700 nm ± SD
	0.78 μg/mL	1.56 μg/mL	3.13 μg/mL	6.25 μg/mL	12.5 μg/mL	25 μg/mL	50 μg/mL
T. longicaulis	0.065 ± 0.001^a,b	0.105 ± 0.001^a,b	0.172 ± 0.003^a,b	0.301 ± 0.001^a	0.534 ± 0.008^a	0.946 ± 0.011^a	1.619 ± 0.008^a
T. praecox subsp. polytrichus	0.060 ± 0.004^a,c	0.090 ± 0.004^a,c	0.147 ± 0.015^a	0.242 ± 0.019^b	0.432 ± 0.018^b	0.782 ± 0.019^b	1.340 ± 0.014^b
T. pulegioides	0.070 ± 0.001^b	0.109 ± 0.001^b	0.179 ± 0.002^b	0.319 ± 0.005^c	0.547 ± 0.004^a	0.961 ± 0.023^a	1.541 ± 0.029^c
T. serpyllum subsp. serpyllum	0.060 ± 0.006^a,c	0.090 ± 0.007^a,c	0.147 ± 0.015^a	0.254 ± 0.019^b	0.442 ± 0.023^b	0.809 ± 0.008^b	1.359 ± 0.064^b
T. striatus	0.055 ± 0.001^c	0.085 ± 0.004^c	0.143 ± 0.006^a	0.249 ± 0.006^d	0.447 ± 0.010^b	0.795 ± 0.017^b	1.439 ± 0.017^d
T. vulgaris	0.062 ± 0.001^a,b,c	0.094 ± 0.003^a,b,c	0.149 ± 0.005^a,b	0.254 ± 0.001^b	0.464 ± 0.014^b	0.797 ± 0.001^b	1.376 ± 0.005^b,d
Rosmarinic acid	0.173 ± 0.005^d	0.321 ± 0.013^d	0.581 ± 0.015^c	1.055 ± 0.028^e	1.777 ± 0.065^c	3.251 ± 0.086^c	3.584 ± 0.010^e
Luteolin	0.142 ± 0.006^e	0.228 ± 0.008^e	0.390 ± 0.012^d	0.641 ± 0.037^f	1.132 ± 0.026^d	1.782 ± 0.045^d	3.568 ± 0.038^e
Trolox	0.089 ± 0.002^f	0.148 ± 0.007^f	0.240 ± 0.016^e	0.432 ± 0.018^g	0.903 ± 0.025^e	1.496 ± 0.021^e	2.941 ± 0.001^f

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