Exploration of Drug Science

Table 4

DPPH and ABTS radical scavenging activity of the extracts and standards

Plant Extract	Concentration (µg/mL)	DPPH radical scavenging activity (% inhibition)	ABTS radical scavenging activity (% inhibition)
Acetone extract of A. officinalis	250	11.37 ± 0.024	54.5 ± 0.019
	500	27.24 ± 0.022	72.92 ± 0.015
	750	35.54 ± 0.034	84.41 ± 0.008
	1,000	37.93 ± 0.005	93.03 ± 0.039
Acetone extract of R. canina	250	88.53 ± 0.007	94.16 ± 0.015
	500	91.77 ± 0.012	94.25 ± 0.005
	750	92.49 ± 0.006	94.96 ± 0.016
	1,000	94.48 ± 0.003	95.7 ± 0.005
Acetone extract of G. glabra	250	NA	91.11 ± 0.014
	500	13.78 ± 0.015	94.86 ± 0.013
	750	34.74 ± 0.013	95.77 ± 0.020
	1,000	58.18 ± 0.022	97.18 ± 0.022
Acetone extract of E. purpurea	250	12.76 ± 0.025	22.69 ± 0.038
	500	23.38 ± 0.025	24.89 ± 0.056
	750	26.45 ± 0.022	41.3 ± 0.064
	1,000	30.93 ± 0.008	50.76 ± 0.011
Chloroform extract of A. officinalis	250	NA	NA
	500	4.95 ± 0.013	16.13 ± 0.018
	750	5.04 ± 0.013	32.55 ± 0.034
	1,000	5.71 ± 0.021	33.03 ± 0.002
Chloroform extract of R. canina	250	13.92 ± 0.018	17.14 ± 0.012
	500	22.38 ± 0.009	33.24 ± 0.015
	750	29.33 ± 0.010	49.96 ± 0.041
	1,000	38.21 ± 0.022	58.27 ± 0.007
Chloroform extract of G. glabra	250	6.73 ± 0.021	30.08 ± 0.037
	500	7.58 ± 0.013	47.90 ± 0.041
	750	7.69 ± 0.025	68.30 ± 0.009
	1,000	8.11 ± 0.031	85.61 ± 0.011
Chloroform extract of E. purpurea	250	NA	7.67 ± 0.018
	500	NA	21.37 ± 0.011
	750	NA	36.08 ± 0.011
	1,000	5.09 ± 0.020	53.85 ± 0.043
Rutin	250	86.80 ± 0.008	78.54 ± 0.048
	500	87.91 ± 0.003	81.94 ± 0.019
	750	90.60 ± 0.004	85.26 ± 0.010
	1,000	91.89 ± 0.011	87.63 ± 0.006
BHT	250	88.85 ± 0.012	93.48 ± 0.011
	500	89.55 ± 0.005	93.92 ± 0.006
	750	90.27 ± 0.011	94.43 ± 0.004
	1,000	91.55 ± 0.008	96.65 ± 0.008

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NA: no activity. All values are shown as mean ± standard deviation