Table 3.

Antioxidant activity of blackberry leaves aqueous and hydroalcoholic extracts.

	TPC (mg GAE/g) *	DPPH IC50 (μg/mL)	ABTS IC50 (μg/mL)	CUPRAC IC0.5 (μg/mL)	FRAP IC0.5 (μg/mL)	HORAC Equivalent Gallic Acid Concentration (μg/cm3)	ORAC Equivalent Trolox Concentration (μM)
Water extracts
Chester	42.86 ± 0.71	99.37 ± 2.47	69.83 ± 1.15	175.80 ± 9.23	98.66 ± 2.60	n/a	n/a
Loch Ness	29.89 ± 0.19	194.8 ± 5.59	81.73 ± 2.31	242.80 ± 3.12	112.07 ±3.49	n/a	n/a
Loch Tay	71.29 ± 2.67	76.70 ± 3.92	39.37 ± 1.82	103.87 ± 11.94	58.91 ± 1.80	n/a	n/a
Ruczaj	69.34 ± 1.89	90.80 ± 1.31	49.27 ± 1.21	132.67 ± 7.94	82.51 ± 4.20	n/a	n/a
Hydroalcoholic extracts
Chester	92.42 ± 1.14	66.67 ± 1.27	30.40 ± 2.15	72.80 ± 3.16	45.20 ± 0.63	120.80 ± 8.20	30.40 ± 3.10
Loch Ness	69.44 ± 3.80	71.37 ± 2.19	35.10 ± 1.32	105.7 ± 3.89	47.10 ± 3.10	115.60 ± 10.3	36.20 ± 1.00
Loch Tay	101.31 ± 0.11	57.37 ± 3.61	24.83 ± 0.23	62.73 ± 3.89	39.99 ± 0.58	121.10 ± 11.2	34.70 ± 2.20
Ruczaj	95.55 ± 2.09	59.4 ± 0.87	28.67 ± 1.72	65.63 ± 2.91	39.44 ± 1.61	101.50 ± 4.20	42.00 ± 2.40

Data expressed as mean ± SD. * Data expressed as miligrams of gallic acid equivalents (GAE) per 1g of plant material. The best values (the TPC and the lowest IC₅₀ or IC_0.5) are shown in bold. n/a—non applicable.