The present invention provides an improved oil injection lubrication system for two-cycle engines. Also, an electrically conductive layer or film formed from the composition, and articles comprising the electrically conductive layer or film are provided. The truck includes a pivot that has two oppositely extending axial sections, and the frame includes a pivot hole, and a first segment and a second segment extending at two sides of the pivot hole, wherein the first segment and the second segment include an angle and each of the first and second segments has an end far from the pivot hole provided with an axle. Due to the porosity and large surface area of both the composite medium and the substrate in which it is disposed, a high degree of contact is achieved between the active component and the fluid stream being processed. The at least partially cured biomaterial is contoured to achieve a desired conformation approximating that of the nuclear cavity. Propagation of nonequilibrium electrons in the magnon gain medium causes generation of nonequilibrium magnons.