. 2021 Nov 18;10(11):1832. doi: 10.3390/antiox10111832

Table 4.

Antioxidant capacity of the EOs and hydrosols of Olea europaea L. cv. Oblica over the period of six months.

Essential Oils
Antioxidant Assay	December	January	February	March	April	May
ORAC (Trolox eq)	9.28 ± 1.19 ^b	11.44 ± 0.08 ^b	73.12 ± 5.24 ^a	9.66 ± 0.24 ^b	16.93 ± 0.43 ^b	4.43 ± 0.16 ^b
DPPH (% inhibition)	4.64 ± 0.03 ^b	4.48 ± 0.52 ^b	6.72 ± 0.14 ^b	21.71 ± 0.25 ^a	10.73 ± 0.57 ^ab	4.95 ± 0.16 ^b
DPPH (IC 50)	127.71 ± 3.38 ^d	130.71 ± 18.34 ^d	78.25 ± 0.90 ^b	23.58 ± 0.18 ^a	86.15 ± 3.05 ^b	105.18 ± 5.71 ^c
Hydrosols
Antioxidant Assay	December	January	February	March	April	May
ORAC (Trolox eq)	23.62 ± 4.40 ^c	36.83 ± 0.66 ^b	82.66 ± 4.37 ^a	29.28 ± 0.76 ^bc	20.31 ± 1.30 ^c	12.39 ± 1.71^d
DPPH (% inhibition)	69.99 ± 2.62 ^c	92.04 ± 3.83 ^a	50.19 ± 1.33 ^d	98.06 ± 6.52 ^a	29.56 ± 1.06 ^e	78.20 ± 4.16 ^b
DPPH (IC 50)	9.01 ± 0.33 ^a	5.41 ± 0.23 ^a	9.96 ± 0.26 ^ab	4.16 ± 0.28 ^a	16.91 ± 0.61 ^b	6.39 ± 0.34 ^a

ORAC, oxygen radical absorbance capacity, results for EOs expressed as µmol of Trolox equivalents (TE) per g of EO (10 mg/mL) and for hydrosols as µmol of Trolox equivalents (TE) per g of the total (undiluted) tested hydrosol sample (10 mg volatiles/mL of hydrosol); DPPH, percentage (%) of inhibition was calculated for the concentrations of EOs and hydrosols of 10 mg/mL; IC50 expressed in mg/mL; SD = standard deviation of triplicate analysis; significant differences were determined using 2-way ANOVA followed by Šídák’s multiple comparisons test. ^a,b,c,d,e Mean values in the same row with different superscript letters indicate a statistically significant difference between data from six months (p < 0.05).