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Table 1 Total polyphenolic content and antioxidant activity of crude extracts and polyphenolic-rich fractions

From: Attenuation of oxidative stress in U937 cells by polyphenolic-rich bark fractions of Burkea africana and Syzygium cordatum

Plant

Extract/Fraction

TPC (GAE mg/g extract ± SEM)

TFC (RE mg/g extract ± SEM)

Antioxidant activity

(TE ± SEM)

TEAC

DPPH

B. africana

Aqueous

260.1 ± 10.8

196.8 ± 7.3

1.2 ± 0.0

1.1 ± 0.0

Methanolic

484.4 ± 13.7

334.3 ± 3.0

1.4 ± 0.0

1.5 ± 0.0

Polyphenolic

699.1 ± 25.3

460.0 ± 18.9

2.0 ± 0.1

2.2 ± 0.0

S. cordatum

Aqueous

183.9 ± 5.6

130.6 ± 9.5

0.8 ± 0.0

0.7 ± 0.0

Methanolic

260.8 ± 9.2

192.2 ± 8.9

1.1 ± 0.0

1.1 ± 0.0

Polyphenolic

619.4 ± 11.3

334.0 ± 9.7

2.5 ± 0.1

3.0 ± 0.1

Ascorbic acid

-

-

2.8 ± 0.0

1.7 ± 0.0

  1. GAE, Gallic acid equivalents; TFC, Total flavonoid content; RE, Rutin equivalents; TE, Trolox equivalents.