1. Preparation of essential oils
The essential oils (EO) tested were extracted by the hydrodistillation method using
Clevenger’s apparatus. They were from Syzygium aromaticum (Linn.) Merr.& Perry (dried bud) and
Cinnamonum zeylanicum (dried bark).The recovered oils were dried over anhydrous sodium sulphate
and stored at 4 C. until use.