Solvent extraction of Cu, Mo, V, and U from leach solutions of copper ore and flotation tailings.

Flotation tailings from copper production are deposits of copper and other valuable metals, such as Mo, V and U. New hydrometallurgical technologies are more economical and open up new possibilities for metal recovery. This work presents results of the study on the extraction of copper by mixed extractant consisting -toluidine dissolved in toluene.

(90)Y microspheres prepared by sol-gel method, promising medical material for radioembolization of liver malignancies.

A new technology for the production of radiopharmaceutical (90)Y microspheres in the form of spherical yttrium oxide grains obtained by sol-gel method has been described. The authors present and discuss the results of investigations performed in the development of new production technology of yttrium microspheres and determination of their physic-chemical properties. The final product has the structure of spherical yttrium oxide grains with a diameter 25-100μm, is stable and free from contaminants.

Synthesis of microspheres of triuranium octaoxide by simultaneous water and nitrate extraction from ascorbate-uranyl sols.

A new method for synthesis of uranium oxide microspheres (diameter <100 μm) has been developed. It is a variant of our patented Complex Sol-Gel Process, which has been used to synthesize high-quality powders of a wide variety of complex oxides. Starting uranyl-nitrate-ascorbate sols were prepared by addition of ascorbic acid to uranyl nitrate hexahydrate solution and alkalizing by aqueous ammonium hydroxide and then emulsified in 2-ethylhexanol-1 containing 1v/o SPAN-80.

[Influence of nitrates on red blood cell deformability and clinical parameters in patients with silent ischemia].

In 30 patients after myocardial infarctum with actual silent ischemia (no pain during last 12 months) mononitrate (Olicard 40) was administered and red blood cell deformability was determined. Clinical improvement and decrease of aforementioned deformability were observed after mononitrate therapy.

[Imidazoline receptors and use of drug blocking receptors I1].

Imidazoline-preferring receptors are important in the pathophysiology of hypertension. The selective l1-receptor agonists are moxonidine, cimetidine and rilmenidine. Some clinical studies indicate the usefulness of moxonidine therapy in hypertension, arrhythmias and acute myocardial infarction.