Abstract: In a photocatalyst which is obtained by adding a co-catalyst to semiconductor particles containing strontium titanate and which causes a water decomposition reaction in which water molecules are decomposed into oxygen molecules and hydrogen molecules according to light emission, the semiconductor particles are doped with barium or additionally with scandium. A method of synthesizing a semiconductor for the photocatalyst includes a process of synthesizing semiconductor particles containing strontium titanate doped with barium by mixing barium titanate or additionally with scandium oxide into strontium chloride or mixing strontium titanate or additionally scandium oxide into strontium chloride and barium chloride and performing firing.

Abstract: A relay box protective structure, which protects a relay box from a tread surface stripped off when a tire 2 bursts, and includes a fender 3, a relay box 6, a relay box cover 7, and a movement restricting component 10, is provided. The fender 3 is fixed to a frame 1 of a vehicle body. The relay box 6 is arranged higher than and behind a lower end 3a of the fender 3, and fixed to the vehicle body. The relay box cover 7 is arranged higher than and behind the lower end 3a of the fender 3, includes a bottom 8 covering a lower surface of the relay box 6, and is fixed to the vehicle body. The movement restricting component 10 is fixed to the frame 1 behind a back end 7a of the relay box cover 7, restricting movement of the relay box cover 7 towards the vehicle front.

Abstract: A cab-side cover 10 is fixed to a cab 1, and a chassis-side cover 13 is fixed to a side member 2. A rear edge portion 7a of a tilt stay 7 is located between a front tire 5 and the side member 2 while the cab 1 is in a non-tilted state. The cab-side cover 10 includes a cab-side front cover portion 12, and the chassis-side cover 13 includes a chassis-side front cover portion 15. The cab-side front cover portion 12 is located at the outer side, in the vehicle-width direction, of the tilt stay 7 and extends further forward than the rear edge portion 7a of the tilt stay 7 while the cab 1 is in the non-tilted state. The chassis-side front cover portion 15 is located at the inner side, in the vehicle-width direction, of the tilt stay 7 and extends further forward and downward than the front lower edge of the cab-side front cover portion 12 while the cab 1 is in the non-tilted state.

Abstract: A cab-side cover 10 is fixed to a cab 1, and a chassis-side cover 13 is fixed to a side member 2. A rear edge portion 7a of a tilt stay 7 is located between a front tire 5 and the side member 2 while the cab 1 is in a non-tilted state. The cab-side cover 10 includes a cab-side front cover portion 12, and the chassis-side cover 13 includes a chassis-side front cover portion 15. The cab-side front cover portion 12 is located at the outer side, in the vehicle-width direction, of the tilt stay 7 and extends further forward than the rear edge portion 7a of the tilt stay 7 while the cab 1 is in the non-tilted state. The chassis-side front cover portion 15 is located at the inner side, in the vehicle-width direction, of the tilt stay 7 and extends further forward and downward than the front lower edge of the cab-side front cover portion 12 while the cab 1 is in the non-tilted state.

Abstract: A relay box protective structure, which protects a relay box from a tread surface stripped off when a tire 2 bursts, and includes a fender 3, a relay box 6, a relay box cover 7, and a movement restricting component 10, is provided. The fender 3 is fixed to a frame 1 of a vehicle body. The relay box 6 is arranged higher than and behind a lower end 3a of the fender 3, and fixed to the vehicle body. The relay box cover 7 is arranged higher than and behind the lower end 3a of the fender 3, includes a bottom 8 covering a lower surface of the relay box 6, and is fixed to the vehicle body. The movement restricting component 10 is fixed to the frame 1 behind a back end 7a of the relay box cover 7, restricting movement of the relay box cover 7 towards the vehicle front.