Abstract: What is disclosed is a standard compositon for the control of diagnostic methods for detecting substances contained in urine, said composition comprising a water-soluble acetylacetonate together with a water-soluble hexanitrocobalt-(III)-salt.

Abstract: A valuable composite material is produced by sintering together a first starting material A composed of at least one mineral component, preferably of the apatite group and a second starting material B composed of an inorganic multi-component system, such as a glass or a glass ceramic material which may contain at least one modifier. The modifier may be an agent causing under the sintering conditions foaming of the composite material, such as a carbonate, or it may be a radioactive agent. The first starting material may also contain an inorganic permutite serving as ion exchange agent. The composite material is useful as implant material in the animal and human body for replacing damaged bones or teeth, as a radioactive source, for instance, for exposing the body to radioactive irradiation, as an ion donor, for instance, for supplying the body with calcium, magnesium, and/or potassium ions, as a filter material for removing harmful agents from the body, and for other purposes.

Abstract: A process for producing and operating an electroplating bath in which there appears NH.sub.4.sup.+ ions which impair the quality of the bath comprising adding salts of a hexanitrocobaltate-III complex to the bath to bring about precipitation of the NH.sub.4.sup.+ ions.

Abstract: The glass ceramic material of the present invention has the following composition, in weight percent,:About 20 to about 60 percent of silicon dioxide SiO.sub.2,about 5 to about 40 percent of phosphorus pentoxide P.sub.2 O.sub.5,about 2.7 to about 20 percent of sodium oxide Na.sub.2 O,about 0.4 to about 20 percent of potassium oxide K.sub.2 O,about 2.9 to about 30 percent of magnesium oxide MgO, andAbout 5 to about 40 percent of calcium oxide CaO,and may contain betweenAbout 0.5 and about 3.0 percent of fluorine.The glass ceramic material is produced by melting the mixture of components and subjecting the resulting melt to a specific annealing or tempering treatment to cause formation of nuclei and ceramization. Such glass ceramic material is especially useful as bone and tooth replacement material in humans and animals.