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Table 4 Effects of protein concentration and phenolic removal on α-glucosidase and DPPH radical scavenging activities

From: Antidiabetic and antioxidant properties of Ficus deltoidea fruit extracts and fractions

F. deltoidea samples

Total phenolic content (mg gallic acid equivalent/g sample)

Protein (μg protein/mg sample)

IC50, (μg/ml)

Crude α-glucosidase inhibitory activity

DPPH radical scavenging activity

SF (var. angustifolia)

    

SFC

5.89 ± 0.12a,***

49.53 ± 3.06e

348.38 ± 20.06**

547.83 ± 18.11***

SFW

3.98 ± 0.07b,***

59.53 ± 1.16e

396.99 ± 16.01*

975.20 ± 20.79***

BF (var. kunstleri)

    

BFC

8.29 ± 0.10c,***

70.87 ± 1.15f,*

350.72 ± 16.80**

449.64 ± 17.3**

BFW

6.56 ± 0.12d,***

86.86 ± 3.10g,**

199.64 ± 10.77***

531.17 ± 21.59***

  1. Each value is expressed as a mean ± SD (n = 3). Values with different superscript letters between the same variety, within the same column are significantly different at p < 0.01. *p < 0.05, **p < 0.01 and ***p < 0.001 are significant differences from samples which were not treated with PVP, (NH4)2SO4 and cold acetone. PVP: Polyvinylpyrrolidone; (NH4)2SO4: ammonium sulphate. SFC and SFW indicate crude aqueous extract and water fraction of SF (var. angustifolia). BFC and BFW indicate crude aqueous extract and water fraction of BF (var. kuntsleri).