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• W2032332893 abstract "This study deals with the valorisation of medicinal and aromatic plants of the Tunisian flora, in order to find new bioactive natural products. The essential oil constituents from the flowers of Allium roseum var. odoratissimum, a North African endemic species growing in the south-east of Tunisia, were extracted by hydrodistillation and analysed by GC–MS. The most important compounds were sulphurous compounds (2,4-dimethylthiophene, 2-propenyl methyl disulfide, 1-propenyl methyl disulfide, dimethyl trisulfide, and 3-methyl-thiopropionaldehyde or methional). After an exhaustive literature review dealing with other varieties of the same species, it seems that the variety odoratissimum is the only taxon characterized by trisulfide and methional contents. Methional is of particular importance because it is found at high concentration (17%). The antibacterial activity of seven extracts was evaluated by the diffusion method and by determining the inhibition zone. All extracts exhibited an antibacterial activity at different levels against strains reported as the causal agents of food-borne diseases. Results suggest the potential use of the plant as condiment and preservative in the food industry. La présente étude porte sur les possibilités de valorisation d'une plante aromatique et médicinale de la flore tunisienne dans le but de mettre au point de nouveaux produits bioactifs. Il s'agit d'Allium roseum var. odoratissimum, qui est une espèce endémique nord-africaine, très commune en Tunisie méridionale. Les constituants des huiles essentielles des fleurs de cette plante, extraites par hydrodistillation, ont été analysés par GC–MS. Les principaux constituants de ces huiles étaient des dérivés soufrés (2,4-diméthylthiophène, 2-propénylméthyle disulfide, 1-propénylméthyle disulfide, diméthyl trisulfide et 3-méthyl-thiopropionaldéhyde ou méthional). Ces résultats, analysés à la lumière des données bibliographiques à propos d'autres variétés de la même espèce, permettent de dire que la variété odoratissimum est le seul taxon qui est caractérisé par la présence des trisulfides et du méthional. Ce dernier a été détecté à une forte concentration (17%). L'activité antibactérienne des sept extraits testés a été étudiée par la méthode de diffusion et de détermination de la zone d'inhibition. Tous ces extraits ont montré une activité antibactérienne plus ou moins importante vis-à-vis des souches signalées. Ces résultats suggèrent la possibilité d'utiliser cette plante comme condiment et agent de conservation dans l'industrie alimentaire." @default.
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• W2032332893 date "2007-09-01" @default.
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• W2032332893 title "Essential oil composition and antibacterial activity of different extracts of Allium roseum L., a North African endemic species" @default.
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• W2032332893 doi "https://doi.org/10.1016/j.crci.2007.03.003" @default.
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