Chemical composition and biological activities of essential oils from the leaves of Cymbopogon giganteus Chiov. and Cymbopogon schoenanthus (L.) Spreng (Poaceae) from Benin

The chemical composition of essential oils obtained from the leaves of Cymbopogon giganteus Chiov. and Cymbopogon schoenanthus (L.) Spreng, two Poaceae growing wild in Benin were analyzed by GC and GC/MS. The main constituents of Cymbopogon giganteus were cis-p-mentha-1(7),8-dien-2-ol (19.4%), transp- mentha-2,8-dien-1-ol (16.4%) and limonene (13.7%). The major components identified in the oil of Cymbopogon schoenanthus were piperitone (68.4%), and ä-2-carene (11.5%). The antimicrobial activity of the essential oil of Cymbopogon giganteus was found to be moderate on Staphylococcus aureus ATCC 25923 with MIC equal to 0.32 ± 0.02 mg/mL and Escherichia coli ATCC 25922 with MIC equal to 0.64 ± 0.34 mg/mL. This same oil induced the death of 57.84% of ticks at 8ìL. Therefore, essential oil of Cymbopogon schoenanthus had a low antimicrobial activity on Staphylococcus aureus ATCC 25923 with MIC equal to 2.63 ± 0.16 mg/mL and Escherichia coli ATCC 25922 with MIC equal to 2.63 ± 0.16 mg/mL

Chemical and biological investigations of Syzygium aromaticum L. essential oil from Benin

The essential oil obtained by hydrodistillation from seeds of Syzygium aromaticum (Myrtaceae) growing in Benin was analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS). Twenty-one components, which represented 99.4% of the total constituents of the oil were identified. The essential oil is rich in hydrocarbons monoterpenic. The major constituents found were eugenol (60.4%), trans-β-caryophyllene (24.0%). The oil extract revealed an important antiradical activity and a high antimicrobial activity.Keywords: Antimicrobial activity, antiradical activity, essential oil, eugenol, trans-β-caryophyllene, Syzygium aromaticu

Morphologie des fruits et quelques caractéristiques physique et chimique de l’huile et des tourteaux de Irvingia gabonensis (Irvingiaceae)

Irvingia gabonensis (Irvingiaceae) est un Produit Forestier Non Ligneux (PFNL) connu pour son fruit et son amande comestibles et dont les aspects ethnobotaniques sont largement discutés dans la littérature. Ce travail est une contribution à la caractérisation physique et chimique des fruits de l’espèce du sud-Bénin. Trois (03) formes physiques (cylindrique, sphérique et ellipsoïdale) sont notées da s les fruits collectés à Abomey-Calavi, Sè et Pobè avec une prépondérance des formes cylindriques. Les teneurs en matières grasses sont de l’ordre de 65% et les indices d’acide, d’iode, de peroxyde, de saponification et d’ester déterminés par lesnormes françaises révèlent la bonne qualité des échantillons d’huiles. L’analyse des esters méthyliques des acides gras de l’huile est faite par Chromatographie en Phase Gazeuse (CPG) et montre la prédominance des acides gras saturés (90%) dont les acides myristique C14:0 et laurique C12:0. L’analyse des tourteaux après extraction de l’huile montre une forte proportion de l’azote, du phosphore, du potassium, du magnésium et des protéines totales (20%). Ces tourteaux délipidés pourraient servir à l’assaisonnement des sauces au Bénin avecune bonne valeur nutritionnelle

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

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

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,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

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

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Volatile oil composition and antiproliferative activity of Hyptis spicigera Lam against human breast adenocarcinoma cells MCF-7

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