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Susceptibility of Helicobacter pylori to essential oil of Dittrichia viscosa su...
Miguel, Graça; Faleiro, Leonor; Cavaleiro, Carlos; Salgueiro, Lígia; Casanova, JosephThe essential oil of Dittrichia viscosa subsp. revoluta and its fractions were assessed for anti-Helicobacter activity. The essential oil was isolated by hydrodistillation, submitted to flash column chromatography and analysed by gas chromatography, gas-chromatography coupled to mass spectrometry and 13C-nuclear magnetic resonance. The anti-Helicobacter activity was determined by incorporation of the crude esse...
Analysis of Juniperus communis subsp. alpina needle, berry, wood and root oils ...
Gonny, Marcelle; Cavaleiro, Carlos; Salgueiro, Ligia; Casanova, JosephThe essential oils from needles, berries, wood and roots of Juniperus communis L. subsp. alpina were obtained by hydrodistillation, fractionated on column chromatography and analysed by GC, GC-MS and 13C-NMR. Chemical compositions of wood and root oils are reported here for the first time. Eighty-two, 65, 76 and 54 components were identified, respectively, in needle, berry, wood and root oils. The chemical comp...
Essential oil of Dittrichia viscosa ssp. viscosa: analysis by 13C-NMR and antim...
Blanc, Marie-Cécile; Bradesi, Pascale; Gonçalves, Maria José; Salgueiro, Ligia; Casanova, JosephThe essential oil of Dittrichia viscosa ssp. viscosa from Corsica was investigated by GC and 13C-NMR spectroscopy. First, the sample was submitted to an acido-basic partition and the neutral part was repeatedly chromatographed. The analysis of all the fractions led to the identification of 71 components. The main constituents were fokienol (21.1%), (E)-nerolidol (8.6%) and eudesm-6-en-4alpha-ol (6.2%). The anti...
Chemical variability of Juniperus oxycedrus ssp. oxycedrus berry and leaf oils ...
Boti, Jean Brice; Bighelli, Ange; Cavaleiro, Carlos; Salgueiro, Ligia; Casanova, JosephThe composition of 27 samples of berry oil and 54 samples of leaf oil of Juniperus oxycedrus ssp. oxycedrus from Corsica was investigated by GC, GC-MS and 13C-NMR. The main constituents were terpene hydrocarbons, especially alpha-pinene, myrcene and germacrene D in the oils from berries and alpha-pinene, beta-phellandrene and Delta3-carene in the oils from leaves. The results of the analyses were submitted to k...
Composition of the essential oil of Juniperus cedrus Webb & Berth. grown on Mad...
Cavaleiro, Carlos; Salgueiro, Lígia; Barroso, José G.; Figueiredo, A. Cristina; Pedro, Luis G.; Fontinha, Susana S.; Bighelli, Ange; Casanova, JosephThe essential oils isolated from twigs of Juniperus cedrus Webb & Berth. grown on Madeira were analysed by GC, GC-MS and 13C-NMR. The oils consisted mainly of monoterpene hydrocarbons (53.1-87.8%), the main ones being alpha-pinene (19.6-55.3%), limonene (17.3-32.7%) and Delta-3-carene (5.5-15.7%). The sesquiterpenoid fraction (4.1-22.3%) was dominated by E-caryophyllene (1.6-7.4%), while sandaracopimaradiene (0...
Infraspecific chemical variability of the leaf essential oil of Juniperus phoen...
Cavaleiro, Carlos; Rezzi, Serge; Salgueiro, Ligia; Bighelli, Ange; Casanova, Joseph; Cunha, António Proença daThe essential oil composition of 68 individual plants of Juniperus phoenicea from Portugal was investigated by GC, GC-MS and 13C NMR. [alpha]-Pinene, [beta]-phellandrene, [alpha]-terpinyl acetate and myrcene were found to be the main constituents. Botanical and chemical data as well as phytogeographical distribution indicate J. phoenicea var. turbinata as the unique subspecies occurring in Portugal. Nevertheles...
Intraspecific chemical variability of the leaf essential oil of Juniperus phoen...
Rezzi, Serge; Cavaleiro, Carlos; Bighelli, Ange; Salgueiro, Ligia; Cunha, António Proença da; Casanova, JosephThe composition of 50 samples of essential oil of individual plants of Juniperus phoenicea subsp. turbinata from Corsica was investigated by GC, GC-MS and 13C NMR. [alpha]-Pinene, [beta]-phellandrene, [alpha]-terpinyl acetate, [Delta]-3-carene, myrcene and [alpha]-phellandrene were found to be the main constituents. The results were submitted to cluster analysis and discriminant analysis which allowed two group...
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