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The essential oils (EOs) obtained by hydro-distillation of flowers and stems of Ageratum conyzoides L. (Asteraceae) growing in Ivory Coast were investigated. The oils were analyzed and characterized by GC and GC-MS. Analyses of the EOs led to the identification and quantification of 48 constituents in the flower oil and 44 from the stem oil, respectively. Characterization of the EOs revealed the predominance of 6-demethoxyageratochromene or precocene I (flower: 58.8%, stem: 76.5%) and the sesquiterpene β-caryophyllene (flower: 15.2%, stem: 8.1%). Six of the identified compounds β-copaene, hexanal, trans-cadina-1(6),4-diene, α-calacorene, caryophylla-4(12),8(13)-diene-5-β-ol and 1,10-di-epi-cubenol are reported for the first time as constituents of A. conyzoides. Comparative analysis with data from Nigeria, Pakistan, Fiji and Brazil is reported. The antibacterial activity of EOs from of A. conyzoides was tested against seven bacteria. The inhibition zones and minimum inhibitory concentration (MIC) for bacteria strains which were sensitive to A. conyzoides EOs were in the range of 6.7 to 12.7 mm and 64 to 256 μg/mL, respectively. The EOs showed moderate activity against Staphylococcus aureus and Enterococcus faecalis.

This article is focused on the seasonal variation in the contents of 5-methoxycanthin-6-one from the leaves of Zanthoxylum chiloperone (Rutaceae). Based on the pharmacological interest presented by 5-methoxycanthin-6-one, its seasonal variation in Z. chiloperone leaves was analysed in order to determine the best time for harvesting, optimising the 5-methoxycanthin-6-one content. The seasonal dynamics of canthinone alkaloids can be the key to improve the isolation from natural sustainable sources, such as leaves. Complementarily, this study describes the phytochemistry of leaf from this Ruraceae species.

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Black hair suffers from a lipid deficiency, either on the surface with a decrease in sebaceous secretion or in depth with a lack of covalent bonds between the lipids and the cuticular cells. The result is a porous cuticle, a dull, rough hair that is difficult to untangle and breaks easily. The aim of this study was to evaluate properties of oils extracted from Cocos nucifera and Elaeis guineensis intended for the formulation of shampoos for black hair. Physicochemical and rheological analyses were carried out. Both oils showed a refractive index of 1.45 and melting points of 28 °C and 30 °C for coconut oil and palm kernel oil, respectively. The relative densities, moisture contents, saponification indexes, peroxide values, unsaponifiable matter contents, para-anisidine values were relatively similar while iodine and acid values were different. Both oils are rich in lauric, oleic and linoleic acids. These oils exhibited a Newtonian behavior and a dominant elastic nature after their melting temperature in the study conditions. They could constitute active ingredients for the formulation of shampoo for black hair in view of their different characteristics.Keywords: Physico-chemical analyses, rheological parameters, Cocos nucifera oil, Elaeis guineensis oil.

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