Nemai Chandra Nandi

Constituents of the essential oil from leaves and buds of clove (Syzigium caryophyllatum (L.) Alston)

Essential oil obtained by hydrodistillation from fresh leaves and dry buds of Syzigium caryophyllatum were analyzed by gas chromatography mass spectrometer (GC-MS). Thirty eight components were identified in the leaf oil. The main components were eugenol (74.3%), eucalyptol (5.8%), caryophyllene (3.85%) and α-cadinol (2.43%). Thirty one components were identified in bud oil with the main components being eugenol (49.7%), caryophyllene (18.9%), benzene,1-ethyl-3-nitro (11.1%) and benzoic acid,3-(1-methylethyl) (8.9%). The clove oil from Bangladesh was found to be comparable in terms of its eugenol content. It is suggested that clove can be grown as an economically viable crop in Bangladesh.

Volatile constituents of essential oils isolated from different parts of Alpinia calcarata Rosc

The essential oils isolated from different parts of Alpinia calcarata Rosc. growing in Chittagong, Bangladesh, were analyzed by gas chromatography-mass spectrometry (GC-MS). The leaf oil contained 1,8-cineole (28.48%) and camphor (21.40%) as the major constituents. The stem sheath oil had fenchyl acetate (19.16%) and carotol (16.77%) as the major compounds. On the other hand, the root oil showed fenchyl acetate (51.34%) and borneol (11.44%) as the main constituents.