. 2021 Jan 26;8:264–276. doi: 10.1016/j.toxrep.2021.01.015

Table 2.

IC₅₀ values of Tetrapleura tetraptera methanol fruit extract in in vitro antioxidant tests.

Antioxidant tests	TT IC₅₀ (μg/mL)	Reference standard
Antioxidant tests	TT IC₅₀ (μg/mL)	Compound	IC₅₀ (μg/mL)
DPPH	20.96 ± 0.65^a	Ascorbic acid	15.36 ± 0.29^b
ABTS^•⁺	47.03 ± 0.97^a	Trolox	39.88 ± 0.52^b
Hydroxyl radical	20.63 ± 0.68^a	Mannitol	11.06 ± 0.87^b
CUPRAC	32.08 ± 1.22^a	Trolox	9.76 ± 0.89^b
LPO	47.36 ± 0.67^a	Quercetin	45.61 ± 0.56^b
Protein anti-denaturation	26.76 ± 0.21^a	Ascorbic acid	12.15 ± 0.21^b

Values are expressed as mean ± SD (n = 3). IC₅₀ was calculated using the inverse logarithmic method. Values with the same letter across a row are not significantly different (p < 0.05). TT: Tetrapleura tetraptera methanol fruit extract; DPPH: 2,2-diphenyl-1-picrylhydrazyl; ABTS: 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid); CUPRAC: Cupric ion reducing antioxidant capacity; LPO: Lipid peroxidation.