874135.fig.001a
(a)
874135.fig.001b
(b)
Figure 1: TLC fingerprint (a; b = before and after heating at 110°C for 5 minute, resp.) of thymol standard and essential oils of Trachyspermum ammi; Cymbopogon martinii; and Foeniculum vulgare, from (i) to (iv), respectively.