Abstract: A precast concrete silo complex and a method of constructing it, in which quarter-cylindrical precast concrete members, constituting unit members, are each provided with a pair of radially protruding couplings near both the ends of the member, and the unit members are arranged to form unit cylinders. The unit cylinders are arranged lengthwise and crosswise, with the couplings facing the couplings of adjacent unit cylinders for defining a coupling space between each two adjacent unit cylinders. Horizontal clamp rods extend through the coupling spaces between the end portions of the unit members and between the couplings, and concrete is provided in the coupling spaces. The horizontal clamp rods are tensioned to clamp the end portions of the unit members and the couplings, to give prestress to the concrete, thereby combining the adjacent unit cylinders and solidifying the unit cylinders arranged lengthwise and crosswise.

Abstract: Metal carbide powders containing free carbon which have heretofore been difficult to refine can be refined excellently by charging the metal carbide powders in a fluidizing bed consisting of fluidized heat-resistant particles and having a temperature of a determined range to burn and remove the free carbon contained therein, and by subsequently discharging refined metal carbide powders and combustion gas from an upper part of the fluidizing bed for recovery of the refined metal carbide powders.

Abstract: A novel compound, 4,6-dimethyl-7-keto-nonan-3-ol is extracted from female imagoes of cigarette beetle. This novel compound is the sex pheromone of cigarette beetle and has sex attracting activity to male imagoes. A sex attracting composition comprises the novel compound and a solid carrier. The compound may be impregnated or adsorbed in the carrier.

Abstract: A current limiting element for preventing electrical overcurrent including a principal current conducting member made of a low resistance conductive elastomer having a high coefficient of thermal expansion and having a flattened cross-sectional shape and a heating/heat insulating member which consists of a high resistance conductive elastomer or a resistive coating surrounding the circumference of the conducting member.

Abstract: A smoking composition comprising, as one component, an ester of one or more aliphatic acids and a carbohydrate including cellulose, starch, and the like. The smoking composition is mild and non-irritating, has no off-flavor, and no unpleasant aftertaste remains after smoking.