Abstract: A fuel cell system including a PEFC stack in an inner space of a housing includes a sheathed heater, arranged in the inner space, for heating the inner space; the sheathed heater is placed on a bottom face side of the inner space of the housing, while a gap is provided between the bottom face and the sheathed heater; a mounting plate for mounting an inner device including the PEFC stack is provided in the inner space of the housing; and the sheathed heater is arranged between the mounting plate and the bottom face of the inner space of the housing.

Abstract: Gasoline additives of the present invention comprise nitrogen-containing compounds obtained by hydrolyzing a polyoxyalkylene glycol derivative resulting from polymerization of an epoxy compound using a suitable ketimine compound as a reaction initiator or by modifying the terminal ends of a polybutene compound with amine. Blending the inventive gasoline additive to a base gasoline can produce a gasoline composition which is suitable for use in direct injection gasoline engine.

Abstract: There is provided a reactor internal equipment hoisting apparatus which is hung down from an upper side of a reactor pressure vessel to hoist reactor internal equipment installed inside the reactor pressure vessel. The hoisting apparatus includes a supporting unit which is hung down from the upper side of the reactor pressure vessel with an overhead travailing crane installed on the ceiling of the reactor building, and an elevating unit which is arranged below the supporting unit. A coupling/fixing unit is provided to the elevating unit to be releasably coupled with a hoisting lug. Power hoist using a wire rope or a chain is provided to the supporting unit. The elevating unit is hung down from the supporting unit via the rope or the chain to be moved vertically. This reactor internal equipment hoisting apparatus is easy in maintenance and storage.

Abstract: Lead-free, high-octane gasolines are made up of a selected class of C.sub.5 -paraffinic and C.sub.6 -hydrocarbons and a methyl-t-butylether compound (MTBE) such that they have specified physical properties of research octane numbers, Reid vapor pressures, densities at 15.degree. C. and sulfur contents and also have blended specified amounts of the MTBE compound and of those hydrocarbons to satisfy the requirements as determined by several specified equations. Startability of a cold automobile engine is conspicuously improved and emission of NOx reduced.