Chemical Composition and Antimicrobial Activity of the Essential Oil of Alpinia speciosa K. Schum. Rhizome From India
Abstract The essential oil of the rhizome of Alpinia speciosa K. Schum. collected from Dehradun, India, was isolated by hydrodistillation and analyzed by GC and GC/MS. Sixty-six compounds representing 95.98% of the oil were identified. The major constituents of the essential oil of the rhizome were terpinen-4-ol (15.4%), 1,8-cineole (11.1%) and T-cadinol (8.8%). The oil showed antibacterial activity against Micrococcus luteus, Streptococcus mutans, Bacillus subtilis, Staphylococcus aureus (Gram-positive), Salmonella typhi and Pseudomonas aeruginosa (Gram-negative) using the well diffusion method.