Evolution tectono-sédimentaire et magmatique des bassins viséen supérieur d’Azrou-Khénifra et des Jebilet orientales (Meseta marocaine)

During Upper Visean times, the eastern mesetian basins of eastern Jebilet and Azrou Khenifra show great tectono-sedimentary and magmatic evolution similarities. Their deposits record large instabilities and disorganization with huge thickness and lithological variations, related to a synsedimentary tectonic context. At the same time, tilted block tectonics affect the basement of these basins, controlled by bordering transfert faults. Basic dominant magmatic bodies set up in these basins. Their continental alkaline chemical characteristics are consistent with the regional geodynamic context in this area. Initiated along the transitional zone between eastern and western Meseta, the Azrou-Khenifra and Jebilet basins correspond to intracontinental throws, initiated on and controlled by major strike-slip faults. Their evolution is most likely earlier in time and of a weak opening rate than the neighboring western Meseta basins.Au Viséen supérieur, les bassins mesetiens des Jebilet orientales et d’Azrou Khénifra montrent de grandes similitudes de leur évolution tectono-sédimentaire et magmatiques. Leurs dépôts enregistrent de grandes instabilités liées à une tectonique syn-sédimentaire responsable localement d’une intense désorganisation et de grandes variations de faciès et d’épaisseurs. Ces instabilités sont engendrées par une tectonique en blocs basculés qui affecte le substratum anté-Viséen, contrôlée par des accidents bordiers sub-verticaux à forte composante transcurrente. Des corps magmatiques, pour l’essentiel basiques, se mettent en place dans ces bassins. Ils présentent des caractères chimiques des séries magmatiques alcalines mise en place dans un contexte intracontinental et anorogénique. Initiés le long de la zone de transition entre la Meseta orientale et occidentale, les bassins d’Azrou-Khénifra et des Jebilet orientales correspondent à des sillons intracontinentaux, initiés et contrôlés par des décrochements. Leur évolution est sans doute plus précoce et montre un faible taux d’ouverture que celui enregistré dans les bassins adjacents de la meseta occidentale

Monitoring Charge Exchange in P3HT-Nanotube Composites Using Optical and Electrical Characterisation

Charge exchange at the bulk heterojunctions of composites made by mixing single wall nanotubes (SWNTs) and polymers show potential for use in optoelectronic devices such as solar cells and optical sensors. The density/total area of these heterojunctions is expected to increase with increasing SWNT concentration but the efficiency of solar cell peaks at low SWNT concentrations. Most researchers use current–voltage measurements to determine the evolution of the SWNT percolation network and optical absorption measurements to monitor the spectral response of the composites. However, these methods do not provide a detailed account of carrier transport at the concentrations of interest; i.e., near or below the percolation threshold. In this article, we show that capacitance–voltage (C–V) response of (metal)-(oxide)-(semiconducting composite) devices can be used to fill this gap in studying bulk heterojunctions. In an approach where we combine optical absorption methods withC–Vmeasurements we can acquire a unified optoelectronic response from P3HT-SWNT composites. This methodology can become an important tool for optoelectronic device optimization

Comparison of Antioxidant Activities and Phenolic Content of Moroccan Date Fruits

ABSTRACT: The present study investigates the correlation between phenolic, Flavonoid compound content and antioxidant activity of date fruits. Phenolic content values range from 1.5 to 4.5 mg /100 g fresh weight exprimed as Galic acid equivalent (GAE). Total flavonoids content (TFC) of studied date varies significantly (p < 0.05) from 0.010mg to 0.38 mg/100g fresh weight exprimed as quercetin equivalents (QE). The antioxidant activity of methanol extract evaluated using the DPPH method, and examined by comparison to controls (BHT and Vitamin C). The highest inhibition of oxidation was attained in Bouskri variety, which was 88.88% at 40μg/mL concentration of phenolic compounds. Correlation (R 2 ) between Phenolic compound content and antioxidant activity range from 0,8 to 0,9. However lower correlation was obtained in Deglet Baida variety with (R 2 = 0.6). The high correlation coefficient indicates that phenolics are one of the main compounds responsible for the scavenging effect of date varieties. The date fruit could be a good source of antioxidants, which may have healthy benefits for humans