Bài báo khoa học

Litsea is a genus of evergreen or deciduous trees or shrubs belonging to the family Lauraceae. The genus includes 136 accepted species in tropical and subtropical areas of both hemispheres. They are either dioecious trees or shrubs [1]. The leaves can be either deciduous or evergreen depending on species and are aromatic. The flowers are from greenish to white, greenish-yellow, or yellowish. Our investigations into the volatile composition of Vietnamese species of Litsea have yielded several results which have been published [2]. The leaf oil of L. helferi was rich in limonene (17.5%), [beta]-caryophyllene (14.2%), bicyclogermacrene (13.1%), bicycloelemene (12.4%), and [alpha]-phellandrene (8.0%). The main constituents of L. ferruginea leaf oil were sabinene (34.5%), [alpha]-pinene (10.1%), [gamma]-terpinene (7.8%), limonene (6.9%), and terpinen-4-ol (6.6%). The significant constituents of the leaf oil of L. verticillata included linalool (23.4%), [alpha]-pinene (26.1%), and [beta]-pinene (11.7%). In addition, (E)-[beta]-ocimene (57.4%), along with [alpha]-pinene (7.8%) and [beta]-pinene (7.3%), were the main constituents in the leaf oil of L. glutinosa. The main compounds in the leaf, stem, fruits, and roots oils of L. cubeba were (Z)-citral (32.9-66.1%), sabinene (1.4-14.2%), limonene (7.0-13.6%), and linalool (1.9-9.5%).