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Table 3 Effective concentration causing 50% antioxidant ability (IC50 values) of 1,1-diphenyl-2 picrylhydrazyl (DPPH), hydroxyl (OH), nitric oxide (NO) radical scavenging abilities, iron chelating ability of fruits parts

From: Starch composition, glycemic indices, antioxidant properties and carbohydrate hydrolyzing enzymes activities of African star apple fruit parts

Sample DPPH*(mg/Ml) OH*(mg/ml) NO*(mg/ml) Fe2+ chelating ability (mg/ml)
Pulp 3.03 ± 0.48b 6.12 ± 2.07a 0.67 ± 0.23a 0.38 ± 0.10a
Cotyledon 3.70 ± 0.57c 5.63 ± 1.77b 0.40 ± ±0.26b 0.26 ± 0.15b
Seed coat 3.60 ± 0.55c 5.73 ± 1.77b 0.47 ± 0.26b 0.16 ± 0.04c
Pulp coat 1.32 ± 0.12a 3.69 ± 1.94c 0.39 ± 0.04b 0.14 ± 0.05c
Ascorbic acid 0.96 ± 0.17a 2.25 ± 0.89d 0.55 ± 0.12b
EDTA 0.27 ± 0.09b
  1. *The radical scavenging abilities of the fruits parts were determined as described and expressed as percentage. The IC50 (effective concentration causing 50% antioxidant ability) were calculated using nonlinear regression analysis. Values represent mean ± standard deviation (n = 3). Values with the same letter within a column are not significantly different (p > 0.05). Positive control: ascorbic acid and EDTA (Ethylenediaminetetraacetic acid) were used for DPPH*, OH*, NO* and Fe2+ chelating ability respectively