Abstract: A two-equivalent cyan dye forming coupler represented by the general formula (I) substituted with at least one substituent represented by general formula (II), having substituents as defined in the specification. This coupler has excellent color forming properties and good dispersibility as well as good color hue and excellent fastness to heat and light. The color photographic material containing the two-equivalent cyan dye forming couplers does not exhibit a decrease in color density of cyan color images even when it is processed with a bleaching solution which has a weak oxidation power or a bleaching solution which is exhausted.

Abstract: 1,3,5,7-Tetraacetyloctahydro-1,3,5,7-tetrazocine is produced in improved ld by reacting 1,5-diacetyl-1,3,5,7-tetraazabicyclo-[3.3.1]-nonane with acetic anhydride in the presence of a metal acetate, such as sodium acetate.

Abstract: This invention is a process for the conversion of magnesium fluoride to calcium fluoride whereby magnesium fluoride is decomposed by heating in the presence of calcium carbonate, calcium oxide or calcium hydroxide. Magnesium fluoride is a by-product of the reduction of uranium tetrafluoride to form uranium metal and has no known commercial use thus its production creates a significant storage problem. The advantage of this invention is that the quality of calcium fluoride produced is sufficient to be used in the industrial manufacture of anhydrous hydrogen fluoride, steel mill flux or ceramic applications.

Abstract: Process for the production of 2-deoxy-2-fluoro-D-glucose and the corresponding .sup.18 F-compound by the reaction of acetyl hypofluorite or the corresponding .sup.18 F-compound with 3,4,6-tri-O-acetyl-D-glucal followed by hydrolysis. Process includes the production of the hypofluorite compound at ambient temperature.

Abstract: Poly(vinylazide) having less then 1.5 percent chlorine. The product, i.e., oly(vinylazide) being the reaction product of poly(vinylchloride) and sodium or lithium azide by heating the gel product for an extended period of time in the presence of the azide reactant.

Abstract: Silver halide color photographic materials contain pyrazoloazole type magenta couplers having at least one hydroxyphenyl group bonded thereto. The silver halide color photographic materials are improved in color developability and color image light fastness. The pyrazoloazole type magenta couplers are 5-membered ring/5-membered ring condensed nitrogen heterocyclic type couplers.