Constructs and methods are provided for expressing peptides derived from eukaryotic organisms in plant plastids. A symbol generator uses the higher dimensional signal constellation, or any orthogonal transformation of the higher dimensional signal constellation, to translate a bit stream into a stream of higher dimensional symbols, which it then provides to a modulator. To release and replace the knife cassette, the protruding free extremities of the leg portions of the spring wire are displaced together, thereby to remove the leg bulge portion from the slot contained in the cassette outer wall. The method for manufacturing the composite substance comprises the steps of washing metal or metal compound particles with water, adding a solvent that is compatible with an organic component included in the conductive paste, thereby replacing water components, and drying the metal or metal compound particles having the solvent adhering to the surface thereof.