chemical composition of the essential oil of the fruit of ferula assafoetida l. obtained by steam distillation solvent extraction methodhas been studied by gc/ms for the first time. fifty-four components, comprising 96.9% of the total oil, were identified.epi-α-cadinol (23.15 %), germacrene b (10.98 %), α-gurjunene (6.18 %), (z)-1-propenyl secbutyl disulfide (5.89 %), 5-epi-7-epi-α-eudesmol (4....

the essential oils of leaves and flowers of peucedanum ruthenicum (m. bieb.) rochel (umbelliferae) were prepared by hydrodistillation separately and analyzed by gc and gc-ms, and the composition of both essential oils were compared together. sixteen and eleven compounds were identified in leaves and flowers essential oils representing 100% and 96.4% of total oils, respectively. the major compon...

HIGHLIGHTS The sesquiterpene germacrene D was the major constituent in three EOs under investigation. EO from Campomanesia adamantium considered active against Malassezia furfur. All exhibited vitro anti-inflammatory activity by chemotaxis model. most abundant metabolite class of all study formed hydrocarbons.

the essential oil from flowering aerial parts of nepeta macrosiphon boiss. growing wild in kermanshah province, iran, was analyzed by gc/ms. this essential oil was prepared by a modified likens-nickerson’s simultaneous distillation-extraction (sde) method. forty-five compounds consisting 95.1% of the total components were identified from the oil obtained with a yield of 0.1%w/w. among them, spa...

Sprouts of chicory (Cichorium intybus), a vegetable grown in the dark, have a slightly bitter taste associated with the presence of guaianolides, eudesmanolides, and germacranolides. The committed step in the biosynthesis of these compounds is catalyzed by a (1)-germacrene A synthase. Formation of the lactone ring is the postulated next step in biosynthesis of the germacrene-derived sesquiterpe...

The sesquiterpene cyclase aristolochene synthase from Penicillium roquefortii (PR-AS) has evolved to catalyse with high specificity (92%) the conversion of farnesyl diphosphate (FDP) to the bicyclic hydrocarbon (+)-aristolochene, the natural precursor of several fungal toxins. Here we report that PR-AS converts the unnatural FDP isomer 7-methylene farnesyl diphosphate to (+)-aristolochene via t...

The volatile constituents of the aerial parts of Varthemia. persica DC. var. persica, growing wild in Iran, were investigated by GC-MS. Sixty seven constituents were identified. ?-Cadinene (9.7%), Selin-11-en-4-?-ol (5.30%), Germacrene D (4.9%), Bicyclogermacrene (4.7%), ??Muurolene (4.7%), ?-Eudesmol (4.52%), ?-Himachalen oxide (3.6%), ?-Eudesmol (3.54%), ?-Bourbonene (3.21%) were found to be...

The essential oil of Stachys lavandulifolia Vahl (Lamiaceae) was isolated by hydrodistillation of the aerial parts of the plant, with a yield of 0.25%. The chemical composition of volatile oil was analyzed by capillary GC and GC/ MS. The main components were germacrene-D (13.2%), ?-phellandrene (12.7%), ?-pinene (10.2%), myrcene (9.4%), ?-pinene (8.4%) and Z-?-ocimene (5.8%).

Capillary GC and GC-MS analysis of the essential oil from the cones of JUNIPERUS COMMUNIS L. grown wild in Greece showed a high content of alpha-pinene (ca 27%), sabinene (13%), germacrene-D (10%), and myrcene (9%). The total oil (yield 2.95%) consisted of almost 105 constituents, 77 of which representing 93.1% were identified. As the main component of the oxygenated monoterpenes was found the ...