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Start Over Author "Bighelli A" Journal chemistry & biodiversity
28 results on '"Bighelli A"'

5. Chemical Variability of AlgerianMyrtus communisL

Author

Lahouari Abed, Ange Bighelli, Vincent Castola, Joseph Casanova, Félix Tomi, and Amel Bouzabata

Subjects
Principal Component Analysis, Limonene, Myrtus communis, Bioengineering, General Chemistry, General Medicine, Plant Components, Aerial, Linalyl acetate, Biochemistry, Myrtus, law.invention, chemistry.chemical_compound, chemistry, Linalool, law, Algeria, Botany, Oils, Volatile, Molecular Medicine, Kovats retention index, Composition (visual arts), Myrtus communis L, Food science, Molecular Biology, Essential oil
Abstract

The composition of 55 samples of essential oil isolated from the aerial parts of wild growing Myrtus communis L. harvested in 16 locations from East to West Algeria were investigated by GC (determination of retention indices) and (13) C-NMR analyses. The essential oils consisted mainly of monoterpenes, α-pinene (27.4-59.2%) and 1,8-cineole (6.1-34.3%) being the major components. They were also characterized by the absence of myrtenyl acetate. The compositions of the 55 oils were submitted to k-means partitioning and principal component analysis, which allowed the distinction of two groups within the oil samples, which could be subdivided into two subgroups each. Groups I (78% of the samples) and II were differentiated on the basis of the contents of α-pinene, linalool, and linalyl acetate. Subgroups IA and IB could be distinguished by their contents of α-pinene and 1,8-cineole. Subgroups IIA and IIB differed substantially in their contents of 1,8-cineole and limonene. All the samples contained 3,3,5,5,8,8-hexamethyl-7-oxabicyclo[4.3.0]non-1(6)-ene-2,4-dione (up to 4.9%).

Published
2013
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6. Identification and Quantitative Determination of Resin Acids from CorsicanPinus pinaster<scp>Aiton</scp>Oleoresin Using13C-NMR Spectroscopy

Author

Ange Bighelli, Josephine Ottavioli, Mathieu Paoli, Joseph Casanova, and Félix Tomi

Subjects
Lignan, Chromatography, biology, 010405 organic chemistry, Bioengineering, General Chemistry, General Medicine, Carbon-13 NMR, biology.organism_classification, 01 natural sciences, Biochemistry, 0104 chemical sciences, 010404 medicinal & biomolecular chemistry, chemistry.chemical_compound, chemistry, Pinoresinol, Molecular Medicine, Pinus pinaster, Oleoresin, Abietic acid, Spectroscopy, Molecular Biology, Levopimaric acid
Abstract

Twenty-three resin samples have been obtained by tapping from individual Pinus pinaster adult trees grown in Corsica and submitted to acido-basic partition. Identification and quantitative determination of resin acids has been carried out using 13 C-NMR spectroscopy following a method developed by our group. The main components were dehydroabietic acid (up to 37.6 %), levopimaric acid (up to 35.5 %) and abietic acid (up to 24.7 %). A lignan, pinoresinol, has been identified in some samples. Within the 23 compositions, submitted to k-means analysis and Principal Component Analysis, two clusters have been perfectly differentiated, whose compositions were dominated by dehydroabietic acid (Group I, M=23.5 %, SD=6.3) and levopimaric acid (Group II, M=21.2 %; SD=6.2), respectively. Both compositions have been observed in the three locations of harvest.

Published
2019
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