Bài báo khoa học

The roots essential oil of Zingiber montanum (Koenig) Dietrich) collected from Yentu, Quangninh province, Vietnam in November 2009 was isolated by steam distillation to give oil yield was 0.75% and analyzed by Capillary GC/MS. Nighteen components have been identified accounting more than 98.0% of the oil. The major constituents of this oil appeared to be terpinen-4-ol (35.8%), sabinene (23.7%) and benzene (19.5%). Thirty three components were identified in leaf oil of Zingiber offinale (Willd) Roscoe, sample were collectied in Xieng Khoang provice, Lao, October 2009; which presented about 93.7% of the total composition of the oil. The major constituents of the essential oil were z-citral (27.4%), zingiberene (10.8%), camphene (9.2%), -thujene (9.1%) and 1,8-cineol (5.2%). Thirty one components resprenting 97.6% of the oil of Zingiber offinale sample were collectied in Nghe An provice, Viet Nam, October 2010; were indentified. Z-citral 30.6%), geranial (21.0%), camphene (12.8%), -phellandrene (7.8%), 1,8-cineol (7.3%), geraniol (4.6%) and zingiberene (4.0%) were main compounds of the essential oil.