Synthesis and Characterization of CPC Organomodified and Al13 Pillared Modified Bentonite

In this study, a Moroccan bentonite was used to prepare three modified clays prepared bydifferent intercalating agents: a sodic clay (B-Na) prepared from raw clay by sodium exchangeprocess. The homoionic sodium clay was then used to prepare an organoclay (B-CPC) byintercalation of cetyl-pyridinium chloride (CPC) and an aluminium-pillared clay (Al-PILC) byintercalation of hydroxyl-aluminium cations.The FT-IR analysis showed that the pillaring with Al13 and intercalation with CPC did notdestroy the initial structure of the sodium bentonite, and some characteristic bands of theintercalating agents appears.Detailed characterization with azote gas adsorption confirmed that the specific surface area ofthe natural bentonite was 70 m2/g, and 107 m2/g for the B-Na when impurities are eliminatedand exchanged with sodium cations. The total surface area for the Al-PILC pillared bentonitewas significantly higher than that of unpillared samples and reached the value of 270 m2/gresulting to the increase of the adsorption sites for the N2 gas. A considerable decrease to 7 m2/gof the total surface area for the B-CPC oranophilic bentonite was observed.All clay samples were classified as porous materials, the Al-PILC was a microporous material;whereas natural clays B–CPC and B-Na were mesoporous materials.The B-CPC was the clay that showed the highest (XRD) value of interlayer distance (21.7 Å)corresponding to the bilayer intercalated between the clay mineral layers, and Al-PILC have aXRD peak at 19.4 Å which corresponds to the Al13 intercalating pillars

Chemical composition and antioxidant activity of essential oil, various organic extracts of Cistus ladanifer and Cistus libanotis growing in Eastern Morocco

In the present work, we studied the chemical composition of the essential oil of Cistus ladanifer and Cistus libanotis growing in Eastern Morocco. The essential oils were obtained by hydrodistillation and their chemical composition was analysed using gas chromatography- mass spectrometry (GC–MS). Camphene, borneol, cyclohexanol-2, 2, 6 tremethyl, terpineol-4 and α-pinene were the main constituents of the essential oil of C. ladanifer, while in the essential oil of C. libanotis we obtained terpineol-4, γ-terpinene, camphene, sabinene, α-terpinene and α-pinene. The antioxidant potential of various extracts (water, ethanol, ethanol: water (50:50), methanol, methanol: water (50:50), acetonitrile) and essential oils of C. ladanifer and C. libanotis were carried out by the method of 1,1-diphenyl-1-picrylhydrazylhydrate (DPPH) free radical scavenging. Total phenolic and flavonoid contents were determined. The result show that C. ladanifer of the leaves of methanol: water (50:50) extract had the highest value of total phenolic content and the lowest was present in ethanol: water (50:50) extract of the stem and acetonitrile extract of the flowers of C. libanotis. From our experimental results, the extract of flowers, fruit, stem and leaves of those plants showed highest potential as free radical scavengers.Keywords: Antioxidant, phenolics, flavonoids, essential oil, extracts, gas chromatography- mass spectrometry (GC–MS).African Journal of Biotechnology Vol. 12(34), pp. 5314-532

Chemical composition and antioxidant activity of essentiel oil, various organic extracts of Cistus ladanifer and Cistus libanotis growing in Eastern Morocco

peer reviewedIn the present work, we studied the chemical composition of the essential oil of Cistus ladanifer and Cistus libanotis growing in Eastern Morocco. Camphene, borneol, cyclohexanol-2, 2, 6 tremethyl, terpineol-4 and α-pinene were the main constituents of the essential oil of C. ladanifer, while in the essential oil of C. libanotis we obtained terpineol-4, γ-terpinene, camphene, sabinene, α-terpinene and α-pinene. The result show that C. ladanifer of the leaves of methanol: water (50:50) extract had the highest value of total phenolic content and the lowest was present in ethanol: water (50:50) extract of the stem and acetonitrile extract of the flowers of C. libanotis. From our experimental results, the extract of flowers, fruit, stem and leaves of those plants showed highest potential as free radical scavenger