Abstract: The invention relates to a method for controlling stress in a substrate during laser deposition.

Abstract: A process and installation for the adsorptive separation, in an adsorption olumn, of krypton from a gas mixture containing, in particular, nitrogen in addition to the krypton. The adsorption column is filled with an adsorption medium which adsorbs krypton and nitrogen over a length L extending in the direction of the inflowing gas mixture. After the adsorption of the gas components in the adsorptive column, the adsorption medium is desorbed in the following process step through the intermediary of a gaseous scavenging medium. The scavenging medium flows through the adsorption column in the same direction in which the gas mixture was introduced into the adsorption column during the first process step. The adsorption medium is charged with krypton commencing from the gas inlet of the adsorption column over only such a partial length L.sub.

Abstract: Sorbitol, or another polyalcohol such as erythritol, dulcitol or xylitol, is added to a solution containing uranyl nitrate which may also contain another heavy metal, such as throium or plutonium, prior to preneutralization with ammonia in order to provide a highly viscous solution that can be preneutralized to a great extent without premature precipitation of uranium. The high viscosity makes possible the formation of favorably large drops when the solution is dripped into an ammonia containing bath for external gelification of the drops. According to the pouring apparatus used, the particles after washing, drying and sintering have a diameter between 0.6 and 1.5 mm. The polyalcohol is added to a hydrosol containing from 1.5 to 2 moles per liter of heavy metal, the polyalcohol being added until concentration of one-third mole of polyalcohol per mole of heavy metal is reached. In certain cases up to four moles of ammonium nitrate per liter are added.