The liquid fullerene derivative according to the present invention contains a fullerene moiety, a benzene ring bonded to the fullerene moiety, and first to third alkyl substituents R1, R2 and R3 bonded to 2-, 4- and 6-positions of the benzene ring, respectively, and the first to third alkyl substituents R1, R2 and R3 each contain at least 12 carbon atoms. In fuel cut control during vehicle deceleration, the controller sets a return engine speed at a value that inevitably stalls the engine. Various devices may receive both power and data signals from a network cable. The second semiconductor chip may be arranged on an upper surface of the first semiconductor chip. A shank can be provided for attachment to the chuck of a power drill for rapid driving of the nuts. This treatment increases the energy generating systems of cells by employing the mitochondrial oxidative restoration system.