Isolation of quercetin and mandelic acid from Aesculus indica fruit and their biological activities

BMC Biochemistry

Table 9 Percent ABTS and DPPH Radical Scavenging Potential of quercetin and Mandelic acidisolated from Aesculus Indica Fruit

Samples	Concentrations (μg/mL)	DPPHpercent inhibition (mean ± S.E.M)	DPPHIC₅₀ (μg/mL)	ABTS percent inhibition (mean ± S.E.M)	ABTSIC₅₀ (μg/mL)
Quercetin	1000	81.91 ± 0.70^***		79.80 ± 2.51^**
	500	70.75 ± 1.72^***		66.08 ± 0.40^***
	250	58.25 ± 1.30^***	78	55.01 ± 1.60^***	180
	125	48.44 ± 0.62^***		43.30 ± 3.13^***
	62.5	35.67 ± 0.59^***		32.46 ± 0.50^***
Mandelic acid	1000	78.54 ± 2.00^***		72.70 ± 1.54^***
	500	67.16 ± 0.56^***		62.60 ± 1.72^***
	250	57.71 ± 0.52^***	120	50.66 ± 2.20^***	240
	125	45.50 ± 2.56^***		39.84 ± 0.99^***
	62.5	30.57 ± 1.23^***		27.15 ± 0.76^***
Ascorbic acid	1000	94.35 ± 0.73		89.94 ± 0.86
	500	85.92 ± 0.96		80.29 ± 0.79
	250	80.74 ± 1.19	38	70.22 ± 2.23	58
	125	67.61 ± 0.80		62.97 ± 2.26
	62.5	56.31 ± 0.76		50.88 ± 0.30

Ascorbic acid was used as a positive control. Data is represented as mean ± S.E.M; (n = 3). Values significantly different as compared to positive control, ^** P < 0.01; ^*** P < 0.001

ISSN: 1471-2091