Table 4.

Peak areas of SC lipids after treated with different EOs (n = 3).

	Peak area		The decrease of peak areaa
PE	Asymmetric C-H stretching	Symmetric C-H stretching	Asymmetric C-H stretching	Symmetric C-H stretching	Total of the decrease
Blank	84.12 ± 1.94	33.47 ± 3.14	0	0	0
Vehicle	81.77 ± 0.97	36.99 ± 0.62	−2.35	3.52	1.17
Azone	61.39 ± 5.14	25.38 ± 9.64	−22.73	−8.09	−30.82
Turpentine oil	33.72 ± 4.65	15.77 ± 7.00	−50.40	−17.70	−68.10
Angelica oil	40.61 ± 0.56	15.11 ± 2.00	−43.51	−18.36	−80.23
Chuanxiong oil	38.58 ± 7.98	12.96 ± 4.12	−45.54	−20.51	−66.05
Cyperus oil	44.41 ± 0.77	14.74 ± 3.34	−39.71	−18.73	−58.44
Cinnamon oil	28.60 ± 3.81	8.89 ± 0.97	−55.52	−24.58	−80.1
Clove oil	33.09 ± 12.33	10.33 ± 0.44	−51.03	−23.14	−74.07

^aDecrease in peak area = peak area of EO treatment–peak area of blank.