The essential oils obtained by water distillation from the aerial parts of Helichrysum italicum G. Don subsp. microphyllum (Willd.) Nym. were analyzed by GC and GC/MS. Three different populations growing at different elevations and under different weather conditions were studied from their vegetative period to post-blooming time. Forty-eight constituents accounting for between 96.5% and 83.0% of total oils have been identified and quantified. Among the identified constituents those present in the highest percentage were neryl acetate (17.6-35.6%), nerol (3.7-14.4%) and eudesmen-5-en-11-ol (6.4-23.5%). Among them, the neryl acetal percentage decreased when 5-eudesmen-11-ol percentage increased, and limonene reached 7% relative composition.The main fraction of the oil consisted of oxygenated compounds present in higher concentrations in June.

The combined analysis of a commercial sample of Helichrysum faradifani Sc. Ell. essential oil from Madagascar, using column chromatography, GC-RI, GC-MS and C-13-NMR, led to the identification of 47 components. The main constituents were alpha-fenchene (32.3%), gamma-curcumene (19.4%), (E)-beta-caryophyllene (14.2%), alpha-curcumene (2.9%), limonene (2.8%), lavandulyl acetate (2.1%) and alpha-fenchene hydrate (1.7%). The composition of this sample was quite different from that of a laboratory-distilled sample previously reported by our group. Moreover, none of the compositions reported in the literature for other Helichrysum oils exhibited a high content of alpha-fenchene. C-13-NMR data for exo-alpha-fenchene hydrate are reported. Copyright (c) 2005 John Wiley & Sons, Ltd.

The leaf, stem bark and root bark oils of Isolona cooperi Hutchinson & Dalziel from the Ivory Coast have been analysed by GC (retention index), GC-MS and 13C-NMR spectroscopy. Two types of essential oil were produced by the plant. The leaf and stem bark oils were monoterpene-rich, containing principally (Z)-beta-ocimene and gamma-terpinene and three lactones, 5-[(E and Z)-hexylidene]-5H-furan-2-ones and massoia lactone, were present in appreciable amounts. Conversely, the root bark oil was dominated by 5-isopentenylindole and (E)-beta-caryophyllene. The strategy for the analysis of each oil was adapted according to the nature of the components.

Eupatorium cannabinum subsp. corsicum (L.), an aromatic plant, is an endemic subspecies from Corsica. The essential oil from aerial parts of E. cannabinum subsp. corsicum was studied by GC, GC/MS and 13C NMR. One hundred and forty-seven components were identified representing 93.6% of the total amount. The main constituents are germacrene D (28.5%), α-phellandrene (19.0%) and para-cymene (5.2%). A particularity of this essential oil is the presence of monoterpene esters derived from nerol, lavandulol, borneol, thymol and 8,9-dehydrothymol. These compounds have been investigated using GC/MS in different ionization modes like electron impact (EI), positive chemical ionization (PCI) and negative chemical ionization (NCI).

4‐Epi‐cis‐dihydroagarofuran was isolated from the bark oil of Cedrelopsis grevei and its structure was elucidated by 1D and 2D‐NMR spectroscopy. Copyright © 2004 John Wiley & Sons, Ltd.

Eudesm-5-en-11-ol was isolated from the oil of Helichrysum italicum and its structure was elucidated by 1D and 2D NMR spectroscopy. Copyright (C) 2004 John Wiley Sons, Ltd.

A commercial sample of the essential oil of Chenopodium ambrosioides L. from Madagascar was analysed by GC, GC-MS and 13C-NMR. By GC analysis, the major constituents were found to be ascaridole (1) (41.8%), isoascaridole (2) (18.1%), p-cymene (16.2%), alpha-terpinene (9.7%) and limonene (3.8%). However, ascaridole undergoes a partial thermal isomerisation to 2 and hence the amount of 1 is under-estimated by GC analysis. The actual contents of 1 and 2 (55.3 and 4.6%, respectively) were obtained following combined analysis of the sample by GC and 13C-NMR. Several hydroxy- and polyhydroxy-menthanes were identified by 13C-NMR.

The essential oils obtained by water distillation from the aerial parts of two Helichrysum italicum ssp. growing in Corsica (France), Tuscany and Sardinia (Italy) were analysed by GC-RI and GC-MS. The essential oils prepared from Corsican and Tuscan Helichrysum italicum subsp. italicum exhibited two different compositions. Corsican oils were characterized by the pre-eminence of oxygenated compounds: neryl acetate (major compound), neryl propionate, nerol, acyclic ketones and beta-diketones. Conversely, Tuscan oils were found to exhibit higher contents of hydrocarbons (alpha-pinene, beta-caryophyllene, alpha- and beta-selinenes). The comparison of essential oils hydrodistilled from Corsican and Sardinian Helichrysum italicum subsp. microphyllum showed almost similar chemical compositions. The main constituents were: neryl acetate, nerol, neryl propionate, linalool, eudesm-5-en-11-ol and gamma-curcumene. Copyright (C) 2003 John Wiley Sons, Ltd.

Fire behavior prediction models required for controlling wildland fires can be calculated from a mathematical approach, taking the thermal and chemical properties of forest fuels into account. There is a need for a better understanding of the thermal decomposition of forest fuels. Two steps have been observed during the thermal degradation of Pinus pinaster needles under air sweeping. The two corresponding exothermic peaks showed by DSC curves are superimposed. An original and simple method is proposed to separate each peak from the global exotherm then the kinetic analysis is performed using single peak method (1 scanning rate) and isoconversion method (at least 3 different scanning rates).

A commercial sample of Cedrelopsis grevei H. Baillon from Madagascar was repeatedly chromatographed and the combined analysis of all the fractions by GC, GC-MS and C-13-NMR led to the identification of 114 components. The major constituents were (E)-beta-caryophyllene (9.3%), alpha-copaene (7.7%), alpha-selinene (5.8%), delta-cadinene (4.9%), beta-selinene (4.5%), alpha-humulene (3.3%) and beta-bisabolene (2.8%). Analysis of five other commercial samples confirmed the pre-eminence of sesquiterpene hydrocarbons and exhibited a variation in the contents of the main components: ishwarane (1.0-17.4%), (E)-beta-caryophyllene (1.3-12.5%), alpha-copaene (4.9-11.0%), beta-elemene (0.2-9.6%) and alpha-selinene (1.1-9.4%). Copyright (C) 2003 John Wiley Sons, Ltd.

The components of essential oils of Helichrysum italicum subsp. italicum growing in Corsica were investigated by the combination of GC and GC-MS. In a first part, nine commercial and laboratories-prepared samples were analysed and Corsican oils were found to contain neryl acetate as predominant compound, with amounts from 15.8% (from plants in stage of early shoots) to 42.5% (in full flowering period). In a second part, we sampled Helichrysum italicum subsp. italicum from three locations over the growth cycle of the plant. Significant variations were observed in the concentration of the main constituents, pointing out a chemical composition of oils produced from plants in early shoots (higher amounts of ketones and beta -diketones) different from that obtained from samples harvested in the stages of flowering (higher contents of neryl acetate). Copyright (C) 2001 John Wiley & Sons, Ltd.

Fire behaviour prediction models, required for controlling wildland fires, can be calculated from a mathematical approach, taking the thermal and chemical properties of forest fuels into account. To improve and extend applications of the model, we need a better understanding of the different phenomena involved in the thermal decomposition of forest fuels. Three steps have been observed during thermal degradation of Pinus pinaster needles: dehydration, oxidization of evolved gases and char combustion. Kinetic parameters of the first step were determined from DSC curves using various known methods which enable the determination of activation energy, preexponential Arrhenius factor and order of reaction.

The essential oils of six Helichrysum species from Madagascar were investigated and 46 components were identified by GC, CC-MS and C-13-NMR spectrometry. The main constituents were 1.8-cineole for H.gymnocephalum (59.7%) and H. bracteiferum (27.3%); beta -pinene for H. selaginifolium (38.2%); (E)-caryophyllene for H. cordifolium (55.6%), H. faradifani (34.6%) and H. hypnoides (34.0%). Copyright (C) 2001 John Wiley & Sons, Ltd.

The composition of the essential oils of individual plants of Thymus herba barona Lois. growing wild in Corsica was investigated by GC, GC/MS an carbon-13 NMR. Eight groups of essential oil were distinguished: (i) thymol, (ii) carvacrol, (iii) linalool, (iv) geraniol, (v) α-terpenyl acetate, (vi) terpinen-4-ol, (vii) carvone and cis-dihydrocarvone. Three chemotypes -thymol, carvacrol and linalool – are common in the genus Thymus, two others – geraniol, α-terpenyl acetate – are scarce, while the latest three ones – terpinen-4-ol, carvone and cis-dihydrocarvone are quite original. It is the first time that the cis-dihydrocarvone chemotype is described in the genus Thymus

Flavour and Fragrance JournalVolume 12, Issue 3 p. 147-151 Research Article Composition of the Essential Oil of Cistus ladaniferus L. Cultivated in Corsica (France) J. P. Mariotti, J. P. Mariotti Université de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceSearch for more papers by this authorF. Tomi, F. Tomi Université de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceSearch for more papers by this authorJ. Casanova, Corresponding Author J. Casanova Université de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceUniversité de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceSearch for more papers by this authorJ. Costa, J. Costa Université de Corse, Centre de Valorisation des Ressources Naturelles, BP 52, 20250 Corte, FranceSearch for more papers by this authorA. F. Bernardini, A. F. Bernardini Université de Corse, Centre de Valorisation des Ressources Naturelles, BP 52, 20250 Corte, FranceSearch for more papers by this author J. P. Mariotti, J. P. Mariotti Université de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceSearch for more papers by this authorF. Tomi, F. Tomi Université de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceSearch for more papers by this authorJ. Casanova, Corresponding Author J. Casanova Université de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceUniversité de Corse, CRES, URA CNRS 2053, Equipe Chimie et Biomasse, Route des Sanguinaires, 20000 Ajaccio, FranceSearch for more papers by this authorJ. Costa, J. Costa Université de Corse, Centre de Valorisation des Ressources Naturelles, BP 52, 20250 Corte, FranceSearch for more papers by this authorA. F. Bernardini, A. F. Bernardini Université de Corse, Centre de Valorisation des Ressources Naturelles, BP 52, 20250 Corte, FranceSearch for more papers by this author First published: 28 April 1999 https://doi.org/10.1002/(SICI)1099-1026(199705)12:3<147::AID-FFJ631>3.0.CO;2-QCitations: 39AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract The essential oil of Cistus ladaniferus L., obtained from plants of Spanish origin grown in Corsica, was investigated by 13C-NMR spectroscopy (identification of components) and GC (quantification). First, a bulk sample was analysed and 45 constituents were identified. The main components were α-pinene (39%), viridiflorol (11.8%), ledol (3.3%) and bornyl acetate (3.1%). The occurrence of cyclosativene, γ-cadinene, (E)-β-farnesene and β-eudesmol in the essential oil of Cistus ladaniferus is reported here for the first time. Then, in order to study the chemical variability of individual oils, we examined 20 samples. α-Pinene (11.1–47.4%) was the most abundant component in 18 of the 20 samples, followed by trans-pinocarveol (4.4–10.9%) and viridiflorol (4.7–10.7%). Two samples exhibited a different chemical composition, not as yet described, characterized by the predominance of viridiflorol (20–22.6%), ledol (6.4–6.7%) and trans-pinocarveol (5.4–8.6%). © 1997 John Wiley & Sons, Ltd. Citing Literature Volume12, Issue3May 1997Pages 147-151 RelatedInformation

The constituents of the essential oil of Stachys glutinosa L. were investigated for the first time. In a first part, we studied a collective oil following a methodology which combined chromatographic techniques (CC, GC) with spectroscopic techniques (MS, 13C-NMR). Sixty-four constituents (91% of the total composition) were identified. The major compounds were terpinen-4-ol (13.1%), α-pinene (10.1%), α-terpineol (8.4%), β-phellandrene (6.8%) and γ-terpinene (6.1%). In a second part, we investigated 53 oil samples obtained from individual plants collected widely in Corsica, by GC–RI and GC–MS. The essential oils of S. glutinosa displayed a wide infraspecific chemical variability. © 1997 John Wiley & Sons, Ltd.

Il existe en Corse de nombreuses especes vegetales endemiques susceptibles de fournir des huiles essentielles originales et variees a l'industrie des parfums et des cosmetiques. La procedure de valorisation envisagee ici passe par une etape preliminaire d'analyse de la composition chimique de l'huile essentielle par CPG/SM.