Author : Miriam Fouad Yousif Hanna
Source : Z. Naturforsch.
Date of Publication : 01/0
Abstract : The hydrodistilled essential oil content of Origanum majorana L. (Lamiaceae) ranged
from 2.5 – 3% with the maximal value (3%) in spring. Analysis of the oil by GC/MS resulted
in the identifi cation of 15, 15, 11, and 14 components in the oils prepared in spring, summer,
autumn, and winter, respectively. The composition of the essential oils differed quantitatively
and qualitatively according to the time of collection. Thymol (38.4%) and cis-sabinene
hydrate (25.3%) were the major components in spring plants. Terpinen-4-ol (37.4%, 20.5%,
16.3%) was a major component in the summer, autumn and winter oils, respectively. cis-
Sabinene hydrate (54.4%) was major in winter plants while terpinolene (43.1%) was the
main component in autumn plants. Other components detected in lower amounts in all oil
samples were sabinene and p-cymene (up to 7.4% and 13.9% in autumn), and α-terpinene
(up to 13.3% in summer).