Table 3.

DPPH radical scavenging activities of Thomson peel essential oils

Treatments	Inhibition (%)					IC 50 (mg/ml)
	5 mg/ml	10 mg/ml	20 mg/ml	40 mg/ml	80 mg/ml
SD	30.30 ± 0.52i	39.40 ± 0.52i	50.00 ± 0.50i	56.96 ± 0.25g	59.06 ± 0.40i	20.00a
ShD	35.46 ± 0.59h	48.43 ± 0.51e	51.30 ± 0.36h	67.90 ± 0.55c	70.46 ± 0.45c	15.04c
OD 45	40.66 ± 0.41e	47.36 ± 0.40f	58.00 ± 0.40e	62.33 ± 0.35e	68.36 ± 0.35e	14.23e
OD 60	37.20 ± 0.25g	41.20 ± 0.20h	52.14 ± 0.22g	54.53 ± 0.47h	65.30 ± 0.36g	16.07b
VOD 45	43.30 ± 0.36d	50.51 ± 0.41d	65.03 ± 0.04c	70.10 ± 0.10b	78.16 ± 0.20b	7.99f
VOD 60	47.20 ± 1.02b	56.30 ± 0.36a	67.30 ± 0.26b	69.53 ± 0.45b	78.73 ± 0.37b	7.24i
MW 360	39.30 ± 0.26f	45.20 ± 0.45g	56.36 ± 0.15f	59.43 ± 0.73f	67.60 ± 0.45f	14.76d
MW 600	45.60 ± 0.40c	54.36 ± 0.30b	60.23 ± 1.07d	63.56 ± 0.11d	69.50 ± 0.55d	7.50h
FD	50.00 ± 1.20a	56.19 ± 0.26a	68.90 ± 1.41a	74.20 ± 0.30a	87.90 ± 0.36a	5.00 j
Fresh	42.73 ± 0.75d	52.66 ± 0.87c	58.10 ± 0.55e	62.40 ± 0.52e	64.26 ± 0.25h	7.86g

All values are expressed as mean ± standard deviation. Means (n = 3) having different letters within the same column differ significantly at p < .05.

Abbreviations: SD, Sun drying; ShD, Shade drying; OD 45 and 60, Oven drying at 45°C and 60°C; VOD 45 and 60, Vacuum oven drying at 45°C and 60°C; MW 360 and 600, Microwave drying at 360 W and 600 W; FD, Freeze‐drying.