Jesús Palá-Paúl

Seasonal variation in chemical constituents of Santolina rosmarinifolia L. ssp. rosmarinifolia.

The seasonal variation of the essential oil extracts from the aerial parts of a Santolina rosmarinifolia population has been studied. Oil yields increased in the months of March, April, May and June. Oil concentration showed significant correlations with both precipitation (positive) and temperature (negative). Essential oil main components were sabinene, beta-pinene, myrcene, beta-phellandrene, limonene, 1,8-cineole, artemisia ketone, terpinen-4-ol, capillene, ar-curcumene and beta-eudesmol. Monoterpenes like beta-phellandrene, limonene and 1,8-cineole showed a significant negative correlation with temperature, while capillene presented a strong positive correlation with precipitation. The rest of the essential oil components did not show any noticeable trend.

Analysis of the volatile components of Lavandula canariensis (L.) Mill., a Canary Islands endemic species, growing in Australia

Abstract The essential oil of a Canary Islands endemic species, Lavandula canariensis (L.) Mill., gathered from Australia, was extracted by hydrodistillation and solid phase micro-extraction (SPME). The oils have been studied by GC and GC–MS. A total of 38 compounds have been identified in the leaf oil extracted by hydrodistillation, the principal components being carvacrol (23.6%), β-bisabolene (20.8%), ( E,E )-α-farnesene (11.3%), β-caryophyllene (7.6%) and carvacrol methyl ether (7.3%), while the oil extracted by SPME showed carvacrol (42.6%) as the principal component with moderate amounts of ( E,E )-α-farnesene (9.1%), β-bisabolene (7.5%), cis -hex-3-en-1-ol (5.6%) and carvacrol methyl ether (4.6%). SPME extracts indicated that carvacrol, cis -hex-3-en-1-ol and linalool were in greater concentration in the head space vapours than in the oil. This is the first report describing the essential oil composition of this species.

Variations in the essential oil composition of Artemisia pedemontana gathered in Spain: chemotype camphor-1,8-cineole and chemotype davanone

The essential oil composition of two Spanish populations of Artemisia pedemontana Balbis. has been studied by GC and GC–MS. Variations on the chemical composition of both samples depending on the place of collection have been detected. The main constituents of the oil from A. pedemontana gathered in Canon de Rio Lobos (Ap.Rl) were found to be camphor (49.2%) and 1,8-cineole (12.6%), whereas the oil from this species collected in Mirador de la Galiana (Ap.Mg) showed davanone (28.4%) as major compound. According to our results we suggest the presence of two chemotypes of A. pedemontana camphor+1,8-cineole and davanone

Essential Oil of Eryngium L. Species from New South Wales (Australia)

Abstract The essential oils from aerial parts of five Eryngium species of New South Wales have been examined by GC and GC/MS. The oil of Eryngium expansum F. Muell was characterized by a high amount of 7-epi-α-selinene (38.3%), cis-β-guaiene (10.8%), 2,3,6-trimethylbenzaldehyde (8.0%) and (E,E)-α-farnesene (7.3%). The leaf oil of E. pandanifolium Cham. et Schlecht contained bornyl acetate (20.8%), β-selinene (13.8%), α-selinene (11.3%) and α-muurolene (8.0%) as the main compounds, while the fruit oil was characterized by heptanol (11.5%) and β-selinene (9.2%). The principal compounds of E. rostratum Cav. were found to be spathulenol (20.0%) and β-bisabolol (8.6%) in the leaf oil while β-bisabolol (65.3%) was the main component in the fruit oil. β-Caryophyllene (20.3%), germacrene D (19.2%) and α-humulene (8.8%) were found to be the major compounds of E. vesiculosum Labill. Two populations of an undescribed species (E. sp.1, E. sp. 2) of this genus were also studied, the principal compounds being α-pinene (14.5–46.2%), bicyclogermacrene (7.1–16.4%), cubebol (0.6–9.0%) and spathulenol (0.8–8.7%). This is the first report on the essential oil composition of these Australian species.

Analysis by gas chromatography–mass spectrometry of the volatile components of Ageratina adenophora Spreng., growing in the Canary Islands

The essential oil of Ageratina adenophora Spreng., growing in the Canary Islands was analyzed by GC-MS. A total of 78 volatile compounds was identified and p-cymene (11.6%) was the major component in the oil. The sesquiterpene fraction (44.3%) was higher than the monoterpene one (32.1%).

Analysis by gas chromatography-mass spectrometry of the essential oil from the aerial parts of Pimpinella junoniae Ceb. & Ort., gathered in La Gomera, Canary Islands, Spain.

The essential oil from the aerial parts of Pimpinella junoniae Ceb. & Ort., growing in La Gomera, Canary Islands, Spain, was studied by gas chromatography and gas chromatography-mass spectrometry, and 43 constituents were identified. The major components were found to be alpha-zingiberene (20.6%), alpha-pinene (17.9%), (E)-beta-farnesene (9.3%), ar-curcumene (7.4%), beta-phellandrene (7.0%), beta-bisabolene (6.1%) and epoxypseudoisoeugenyl 2-methylbutyrate (6.0%). The decomposition product of epoxypseudoisoeugenol derivatives, 5-methoxy-2-methylbenzofuran (5.7%), moderate amounts of other arylpropanoids with the pseudoisoeugenol skeleton (total percentage, 5.2%) and other compounds such as beta-sesquiphellandrene (3.0%), cis-beta-guaiene (1.5%), alpha-phellandrene (1.5%) and alpha-bisabolol (1.3%), were also found.

Analysis by gas chromatography-mass spectrometry of the essential oils from the aerial parts of Rutheopsis herbanica (Bolle) Hans. & Kunk., gathered in Fuerteventura (Canary Islands)

The essential oil from the aerial parts of Rutheopsis herbanica (Bolle) Hans. & Kunk., growing in Fuerteventura, Canary Islands, Spain, was studied by gas chromatography and gas chromatography-mass spectrometry, and 42 constituents were identified. The major components were found to be alpha-pinene (29.4%), dillapiole (21.3%), limonene (14.1%), beta-pinene (13.2%) and myristicin (10.0%). As far as we know, this is the first report on the essential oil composition of this species.

Composition of the Essential Oil of Teucrium carolipaui Pau Grown in Spain

Abstract A steam-distilled oil obtained from the aerial parts of Teucrium carolipaui Pau grown in Spain was analyzed by capillary GC and GC/MS. Forty-four components were characterized, of which four were monoterpenes amounting to 1.4%, and 38 sesquiterpenes that totalled 97.9%. The oil contained β-caryophyllene (8.2%), δ-cadinene (14.3%), α-cadinol (7.2%) and 3-β-hydroxy-α-muurolene (9.4%) as major constituents. Other important components were found to be cadina-l,4-diene (4.3%), caryophyllene oxide (4.5%), 1-epi-cubenol (4.1%) and cubenol (3.5%).

Chemical composition of the essential oils form the aerial parts of Bupleurum gibraltarium Lam

Abstract The oils from the umbel rays, stems, leaves, fruits and the whole aerial parts of Bupleurum gibraltarium Lam. have been examined by means of GC/MS and retention indices. The dominant constituents in the oil from the whole aerial parts were found to be: α-pinene (5.9%), sabinene (9.2%), limonene (6.5%), 2,3,4-trimethylbenzaldehyde (17.2%), terpinen4-ol (5.1%), trans-chrysanthenyl acetate (4.7%), elemol (4.3%) and guaiol (5.3%). The major components of the umbel rays oil were: α-pinene (17.6%), sabinene (33.8%), limonene (7.3%), and 2,3,4-trimethyl-benzaldehyde (8.4%). The stem oil was characterized by the presence of α-pinene (6.0%), sabinene (21.8%), limonene (7.2%), 2,3,4-trimethylbenzaldehyde (10.7%), guaiol isomer (5.1%), elemol (5.5%) and guaiol (5.4%). The leaf oil had as main components α-pinene (130%), sabinene (50%) and limonene (10.0%), whereas in the oil from the fruits, α-pinene (42.7%), sabinene (28.3%), and limonene (9.0%) were found to be the most important ones

Essential oil of Santolina rosmarinifolia L. ssp. rosmarinifolia: first isolation of capillene, a diacetylene derivative

Capillene (1-phenylhexa-2,4-diyne) was found to be the main constituent (35.2%) of the essential oil of Santolina rosmarinifolia L. ssp. rosmarinifolia. The related ketone capillin (1-phenylhexa-2,4-diyn-1-one, 0.4%) was also found. The reset of the oil was made up of monoterpenes (53.3%) and sesquiterpenes (9.6%). The main monoterpenes were: β-phellandrene (14.9%), myrcene (13.1%), β-pinene (7.8%) and sabinene (5.5%), while the principal sesquiterpene was ar-curcumene (4.3%). Copyright