Composition chimique de l’huile essentielle des fleurs de Lanneavelutina (Anacardiaceae) du Mali

La présente étude a pour but la détermination de la composition chimique de l’huile essentielle des fleurs de Lanneavelutina, une plante mellifère répertoriée au Mali (Cissé 2004). Cette huile essentielle a été obtenue par entrainement à la vapeur d’eau avec des rendements de l’ordre de 0.04%. Le composé majoritaire identifié est le beta-caryophyllène (22-36%). Elle contient essentiellement des sesquiterpènes, des hydrocarbures saturés et des hydrocarbures oxygénés non terpéniques.Mots clés: Composition chimique, mellifère, entrainement à la vapeur d’eau, sesquiterpène

Activités anticholinestérasiques des alcaloïdes totaux extraits des feuilles, fruits, écorces de racines et écorces de tronc de Guiera senegalensis, une plante médicinale Malienne

Guiera senegalensis J. F. Gmel., arbuste d’espèce soudano-sahélienne; surtout abondant en Afrique occidentale. Très connu dans le sahel où il forme des peuplements mono spécifiques qu’on trouve dans les jachères, sur sol argileux ou sableux. Il est largement utilisé en médicine traditionnelle. Dans la perspective de découvrir de nouveaux composés pouvant trouver une application notamment dans le traitement de la maladie d’Alzheimer, nous avons réalisé les tests d’activité anticholinestérase sur les alcaloïdes totaux extraits des organes des 3 sites de récolte et avec comme produit de référence la Galanthamine. L’action thérapeutique des inhibiteurs des cholinestérases est essentiellement due à l’inhibition de l’acétylcholinestérase. Les résultats obtenus semble très intéressent avec les fruits des trois sites. Ce qui pourrait être une base solide pour la recherche d’un phytomédicament contre cette affection.Mots clés : Guiera senegalensis, alcaloïdes, inhibition acétylcholinestérase

The effect of harvest years on chemical composition of essential oil of pickling herb (Echinophora tenuifolia subsp. Sibthorpiana) leaves used as medicinal plant

The essential oils of leaves of Echinophora tenuifolia subsp. sibthorpiana (Apiaceae) growing wild in Middle Anatolia were obtained by hydrodistillation, and analysed by gas chromatography (GC) and gas chromatography-mass spectrometer (GC-MS). The major constituents were affected depend on harvest years. Methyl-eugenol, δ-3-carene and p-cymene were established as the major components of pickling herb leaves collected between 2003 and 2009. The main constituents of leave oil were methyl-eugenol (24.99% to 90.16%), δ-3-carene (2.57% to 34.80%) and p-cymene (1.23% to 9.81%) depending on the harvest years

Composition of essential oil of Artemisia campestris L. from Serbia

The essential oil yield from the aerial parts of A. campestris was 0.2% (mL/g dried plant). The oil was analyzed using GC and GUMS and 38 compounds were identified. The principal components were sesquiterpene alcohols: spathulenol (9.2%) and 4-hydroxy-9-epi-beta-caryophllene (3.0%); and monoterpene hydrocarbons: beta-pinene (9.1%), alpha-pinene (3.4%), limonene (2.5%) and germacrene D (3.3%)

Essential oil of cytisus triflorus L'Her

The essential oil of Cytisus triflorus L'Her., a Mediterranean species was obtained by steam distillation and identified by GC and GC-MS. 61 compounds were determined. The oxygenated terpenoidic components constituted the most important fraction (64%) followed by the fatty acids (8.2%) and the hydrocarbonated fractions (10.7%

Physical characteristics and Chemical compositions of Leaves extracts of Sorindeia grandifolia Engl. (Anacardiaceae) harvested at Kato, Benin.

International audienc

Physical characteristics and Chemical compositions of Leaves extracts of Sorindeia grandifolia Engl. (Anacardiaceae) harvested at Kato, Benin

International audienceThe results brought back at the end of this work concern various chemical constituents of S. grandifolia leaves collected in Benin. The major compounds (≥4%) of essential oils obtained after hydrodistillation and analysis by coupling gas chromatography with spectrometry mass are constituted of : limonene (20.2%), (E)-β-ocimene (7.6-17.8%), (Z)-β-ocimene (11.4%), γ-cadinene (7.0%), selin-11-en-4-α-ol (4.5-5.7% ), palmitic acid (4.3-6.2%), β-pinene (5.5%), α-selinene (5.5%), α-phellandrene (5.2%), β-selinene (4.9%), β-elemene (4.5%).The lipidic fractions realized from petroleum ether extracts are marked by importants rates of arachidic acid (22.5%), palmitic acid (20.3%) and of linoleic acid (15.9%). The phytochemical analysis showed relatively a large content of coumarins, gallic tannins, flavones, leucoanthocyans and saponins in opposition to the other secondary metabolites

Chemical compositions and physical characteristics of volatile extracts of leaves of Psidium guajava Lin and Lantana camara Linn of Benin

International audienc

,6%). The essential oil of A. senegalensis contains mostly linalool

Abstract: The aromatic vegetable secretions obtained by hydrodistillation from the leaves and fruit of Xylopia aethiopica and Annona senegalensis were studied by GC / MS. Different chemical compositions marked by significant proportions of some compounds are obtained. The main components of the essential oil of X. aethiopica are: b-pinene (8,5-46,1%), sabinene (9,8-41,8%), 1,8-cinéole (5,3-23,8%), a-thujene (5,3-12,6%), a-pinene (5,3%), g-terpinene (6,2%), trans-pinocarvéol (6,6-12,2%), cis-sabinol (6,7%), trans-verbénol (5,0%), pinocarvone (5,2%), terpinen-4-ol (9,2-30,8%), myrténol (9,1-13,7%), myrténal (7,4-17,1%), a-eudesmol (6,0%), élémol (5,1-11,9%) and vélérianol (7,7-10,6%). The essential oil of A. senegalensis contains mostly linalool (7,2-7,3%), (Z)-b-ocimene (6,0%), (E)-b-ocimene (6,6%), germacrene-D (6,5-14,2%), caryophyllene oxide (12,6%), intermédéol (6,5%), b-caryophyllene (5,3-8,8%), palmitic acid (6,6). The majority compounds constitutive of the two varieties of Annonaceae are not identical

Anti-proliferative activity of four aromatic plants of Benin.

International audienc