“…In the present study, the flower, leaf and bark oils of A. brachypus were characterized by high content of oxygenated monoterpenes (Table II). Therefore, antibacterial activity of the oils can be attributed, to a considerable degree, to the existence of oxygenated monoterpenes, such as linalool (Knobloch et al, 1987), terpine-4-ol and endo-borneol (Knobloch et al, 1989;Tabanca et al, 2001), 1,8-cineole (Pattnaik et al, 1997;Tzakou et al, 2001), camphor (Pion et al, 2001;Demetzos et al, 2002), caryophyllene oxide (Sibanda, 2004), α-terpineol (Carson et al, 1995;Cosentino et al, 1999) and menthol (Pattnaiik et al, 1997;Osawa et al, 1999). Furthermore, based on research reports, the monoterpene hydrocarbon such as camphene has remarkable antibacterial activity (Moleyar et al, 1986), whereas p-cymene has not obvious antimicrobial effect when used alone (Dorman et al, 2000;Juliano et al, 2000;Juven et al, 1994;Ultee et al, 2000a), but when combined with carvacrol, synergism has been observed against B. cereus in vitro (Ultee et al, 2000b).…”