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. 2018 Dec 26;8(1):10. doi: 10.3390/foods8010010

Table 1.

Total phenol content and free-radical scavenging activity of leaves extract from Algerian oleaster (O. europaea var. sylvestris).

Method Parameters Sylv.OLE Standard BHT
Free-radical scavenging activity 1
  • -

    IC50 (μg/mL) 2

  • -

    AAI 3

  • -

    Antioxidant activity

 19.2 ± 1.6
4.2 ± 0.1
Very strong		 11.4 ± 0.5
7.1 ± 0.2
Very strong
Folin-Ciocalteu
  • -

    Phenol content (mg/g)

 198.7 ± 3.6

1 DPPH• scavenging method (mean ± standard deviation (SD) of three determinations). 2 IC50 value: Concentration required causing 50% of DPPH inhibition. A lower IC50 value indicates greater antioxidant activity. 3 AAI (Antioxidant Activity Index): AAI = DPPH concentration in reaction mixture (μg/mL)/IC50 (μg/mL); DPPH concentration in reaction mixture = 80 μg /mL; IC50 values are defined as the concentration of test material, which is able to decrease the initial concentration of DPPH to half of its initial value; AAI < 0.5 (Poor); 0.5 < AAI < 1.0 (moderate); 1.0 < AAI < 2.0 (strong), and AAI > 2.0 (very strong). BHT: butylated hydroxytoluene; DPPH•: Stable radical 2,2-diphenyl-1-picrylhydrazyl; Sylv.OLE: extract from leaves of Algerian oleaster.