Abstract: This invention provides a technique which even in an environment without light or with little light irradiation, achieves potent reduction, reduces, by a photocatalytic effect, the oxidation and deterioration of oil when used in edible oil used for fried foods, improves the state of fried foods, attains excellent frying even at lower temperature, exhibits the effect for a long time, has an ability to recycle waste oil as biofuel, and is excellent in food safety. Although a photocatalyst itself is extremely effective outdoors with much ultraviolet light or when an ultraviolet light emitting light is used, the photocatalyst cannot exhibit its functions indoors, in oil in a fryer, or in water. This invention provides a durable reduced photocatalyst which can exhibit significant photocatalytic functions in oil in a fryer, in water, or in the dark, to exert its long-lasting effect.

Abstract: To provide a radiator additive that supports the complete combustion of a mixture gas of air and fuel, thereby improving fuel efficiency and cleaning an exhaust gas. A radiator additive includes a composition of powders of a carbon-based semiconductor material and a rare-earth negative ion ore with a maximum particle size of the order of micrometers, and polypropylene glycol.