. 2019 Dec 13;30(1):21–30. doi: 10.4014/jmb.1910.10040

Table 1.

Total phenolic content, radical scavenging activity and reducing power of PEE.

	TPC²⁾(mg GAE/g)	DPPH radical scavenging activity (%, μg/ml)				ABTS radical scavenging activity (%, μg/ml)				Reducing power (absorbance value⁴⁾)

		50	100	200	400	50	100	200	400	50	100	200	400
PEE¹⁾	92.39±1.30³⁾	24.95±1.98^d	46.14±1.25^c	70.47±2.45^b	79.37±0.76^a	53.83±0.39^c	86.38±0.39^b	>99.99^a	>99.99^a	0.081±0.01^d	0.121±0.00^c	0.183±0.01^b	0.276±0.02^a
BHA⁵⁾		54.98±2.38^c	77.81±1.67^b	86.14±0.78^a	88.40±0.29^a	>99.99^a	>99.99^a	>99.99^a	>99.99^a	0.325±0.00^d	0.486±0.01^c	0.685±0.02^b	0.760±0.01^a
AA⁵⁾		86.27±0.19^d	91.29±0.22^c	92.16±0.11^b	93.73±0.29^a	>99.99^a	>99.99^a	>99.99^a	>99.99^a	0.262±0.01^d	0.532±0.01^c	0.646±0.02^b	0.773±0.01^a

¹⁾PEE: Polygonum cuspidatum 50% ethanol extract.

²⁾TPC: total phenolic content was expressed in terms of mg gallic acid equivalents.

³⁾Data represent the means ± SD in triplicate.

⁴⁾Absorbance value: absorbance value at 700 nm.

⁵⁾Positive controls used were butylated hydroxy anisole (BHA) and ascorbic acid (AA), respectively.

^a-d: Means with the different superscripts within the same row are significantly different at p < 0.05.