A centrifugal separator includes a separation barrel with an upper end, a lower end, a central axis, and a cylindrical wall defining a separation chamber. Fruit has typically bright red skin and juicy with very little fiber. A left sliding trough and a left moving groove are formed on one side of the base. At last, prepare polymethyl methacrylatesilica foam nanocomposite material from polymethyl methacrylatesilica composite material by a foaming method. Compositions also comprise expression cassettes, vectors, transformed plants, transformed plant cells, and stably transformed plant seeds wherein a polypeptide of interest is targeted to a plastid by the plastid transit peptide of the invention. The method can include removing carbon from Cadmium telluride surface.