International audienceThe lipid fraction of Opuntia ficus indica seeds was extracted and analyzed for its chemical and physical properties such as acid value, free fatty acid percentage (% FFA), iodine index, peroxide value, and saponification value as well as refractive index and density. The yield of seed oil was calculated as 11.75%. The acid and free fatty acid values indicated that the oil has a fairly low acidity. The triacylglycerols, fatty acids, sterols, and tocopherols were identified and their concentrations determined. The main TAGs were LLL (25.60%), OLL (21.53%), PLL (15.53%), and POL + SLL (12.73%). Linoleic acid (60.69%) was the dominant fatty acid, followed by oleic (21.42%) and palmitic (12.76%) acids, respectively. A high level of sterols making up 16.06 g/kg seed oil was present. The sterol marker, β-sitosterol, accounted for 71.60% of the total sterol content in the seed oil. Among the tocopherols present in the oil, γ-tocopherol (421.08 mg/kg) was the main constituent

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The brannerite-type vanadate LiMoVO 6 was prepared by different synthetic methods including the solid-state reaction of oxides and wet chemistry techniques in aqueous solution. The physicochemical and electrochemical properties of the LiMoVO 6 products were extensively investigated. Thermal (TG-DTA) analyses and XRD data showed that powders with a quasi-layered structure (C2/m space group) were obtained at temperatures below 400 uC by the acidification reaction of aqueous solutions. The local structure was characterized by Raman scattering, FTIR and 7 Li solid state MAS NMR. The discharge-charge profiles were evaluated in rechargeable Li/LiClO 4 1 PC/LiMoVO 6 cells and chemical diffusion coefficients of Li 1 ions were estimated. Lithium insertion in Li 1 1 x MoVO 6 positive electrodes fired at 550 uC exhibited an initial capacity retention of #200 mA h g 21 which declines rapidly upon charge-discharge cycling. Upon cycling, incremental capacity and Raman features show the instability of the brannerite lattice with the appearance of the Li 2 MoO 4 product.

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