Abstract: A radioactive diagnostic agent for bone scanning, which comprises .sup.99m Tc and a non-radioactive carrier comprising (A) at least one chosen from methanehydroxydiphosphonic acid and their salts and (B) at least one reducing agent for pertechnetates in a weight ratio of about 1:1 to 7:1 and prevents the accumulation of radioactivity in liver so that definite diagnosis can be assured.

Abstract: An illuminated enclosure mounted on the vertical front wall of a vehicle to reduce aerodynamic drag of the vehicle and to display a trademark, name, logo or the like. The major portion of the enclosure is first painted black so as to be substantially impervious to the passage of light. An illuminated area is convered by translucent paint or a decalcomania arranged to display the trademark, name or logo to be displayed. A lighting device is mounted on the front wall of the vehicle and connected to its electrical system. The lighting device has a plurality of spaced light bulbs arranged transversely across the midportion of the illuminated area. In use, the illuminated area is lighted from within the enclosure for observation by others as the vehicle moves along the highway.

Abstract: An improved metal reduction process permits the efficient production of metal from reducible metal compounds by means of reducing metal. Broadly, the invention relates to conducting the reaction between a reducible metal compound and a reducing metal in approximately stoichiometric amounts in an inner beneficial metal container, separated from the exterior reactor walls by an insulating material. In a preferred embodiment, the reducible metal compound and stoichiometric amount of a reducing metal are introduced into a container formed from a metal the same as the desired metal being produced or a metal alloyable therewith. The container is retained in a reaction vessel being separated from the walls of the reaction vessel by an inert insulating material. The container is then heated to a temperature which is above the melting point of the reducing metal but below the temperature at which a reduction reaction between the reducible metal compound and the molten reducing metal will proceed spontaneously.