δ-Cadinene synthase is a sesquiterpene cyclase that utilises the universal achiral precursor farnesyl diphosphate (FDP) to generate predominantly the bicyclic sesquiterpene δ-cadinene and about 2 % germacradien-4-ol, which is also generated from FDP by the cyclase germacradien-4-ol synthase. Herein, the mechanism by which sesquiterpene synthases discriminate between deprotonation and reaction w...

Meniki (Chamecyparis formosensis) and Hinoki (C. obtusa) are precious conifers with excellent wood properties and distinctive fragrances that make these species popular in Taiwan for construction, interiors and furniture. In the present study, the compositions of essential oils prepared from Meniki and Hinoki were analyzed by gas chromatography-mass spectrometry (GC/MS). Thirty-six compounds we...

Three different altitudes were selected to study the variability of terpenoid composition from leaves of female plants of Pistacia lentiscus L. throughout the elevation gradient. GC-MS analyses showed that terpenoid contents change with altitude. Forty nine compounds were identified with a high interpopulation variability for low- and midaltitude sites that also exhibited the same major compone...

Abstract Bunium crassifolium Batt. ( B. ) (Apiaceae) is an extremely rare endemic species from the North East of Algeria. In this study, we extracted volatile organic compounds (VOC) aerial parts using Agilent G1888 network headspace sampler coupled with 7890 GC system. The results revealed presence twenty-two (22) compounds, twenty (20) which were identified as representing 97.48% total compos...

The chemical composition of the volatile oil from aerial parts of Hypericum triquetrifolium Turra was studied by GC-MS. Fifty components (97.1% of the total composition) were detected in the volatile oil. Germacrene-D (21.7%), β-caryophyllene (18.3%), δ-cadinene (6.4%), trans-β-farnesene (4.3%), α-humulene (3.8%), β-selinene (3.7%), γ-cadinene (3.3%) and trans-phytol (3.2%) were found to be the...

Helichrysum microphyllum Cambess. subsp. tyrrhenicum Bacch., Brullo e Giusso (Asteraceae), previously known as Helichrysum italicum ssp. microphyllum (Willd.) Nyman, is one of the many endemic species growing in Sardinia, Corsica and Balearic Islands. In the present work the composition of the essential oil obtained from a population of H. microphyllum ssp. thyrrenicum growing in a littoral loc...

Salvia mirzayanii is member of Lamiaceae family, which distributes only in south of Iran. Phytochemical composition of essential oil isolated by hydro distillation from the aerial parts of Salvia mirzayanii Rech. & Esfand. grown wild and cultivated in Iran were determined using Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS). Forty nine components were identified in the...