[en] This article is devoted to nonlinear excitations in Heisenberg ferromagnets. The methods of theoretical study of dynamics properties of one-dimensional isotropic ferromagnets were considered. The theoretical calculations for study of dynamic properties of structure factor at low temperatures for one-dimensional ferromagnet CsNiF_3 were conducted. Obtained data could be used for neutrons study as well as for study of infrared light scattering on DNA molecules.

[en] Present article is devoted to enthalpy assessment of oxides formation of 4 f- and 5 f-elements. The enthalpy evaluation of formation of lanthanoid oxides and complex lanthanoid hydrides as well as actinide oxides was conducted by means of semiempirical method.

[en] Present article is devoted to sintering of danburite concentrate with sodium nitrate. The complex processing of borosilicate ore concentrate by means of sintering method in ratio (ore and NaNO_3) 1/2 was considered. The dependence of extraction rate of aluminium, boron, iron and calcium oxides at danburite sintering on temperature and process duration was studied. The optimal conditions of sintering of borosilicate ore concentrate were proposed.

[en] This article is devoted to study of local bifurcations of dynamic systems with jagged nonlinearity.

[en] Present article is devoted to ecological issues of usage of natural resources in Tajikistan. The problems of effective water and energy consumption were considered.

[en] Present article is devoted to physicochemical aspects of extraction of uranium concentrates from the uranium industry wastes. The analysis of all uranium tailings of Western Tajikistan was conducted. The physicomechanical properties of tailings were considered. The mineral composition of tailings was defined by means of X-ray phase analysis. The uranium extraction was conducted by means of sulphuric acid method. The activation energy was defined based on processing of kinetic curves.

[en] Present article is devoted to intensification of heap leaching of base ores of Olimpiyskoe Deposit. The test cycles on columned leaching of various types of ores of Tajikistan were conducted under the laboratory conditions. For researches the ore comprising gold from 0.6-1 g/t was given. The results of laboratory researches have shown the possibility of obtaining 50% of gold at heap leaching.

[en] Present article is devoted to efficient estimation of natural sorbents based on vegetable raw materials for the uranium extraction from uranium comprising mine and drainage waters. For the purification of uranium comprising waters from uranium the finely ground fractions of nut and apricot shells as well as pine cones were used. The laboratory researches of the sorption process were carried out in dynamic mode at wide temperature and ph ranges. The uranium content at input and output was controlled by means of chemical analysis. It was defined that apricot shell is the most perspective natural sorbent for purification of uranium comprising mine and drainage waters.

[en] Present article is devoted to obtaining of mixed coagulants from green and kaolin clays for water purification. The results of obtaining of mixed coagulants from green and kaolin clays of Chashma-Sang Deposit of the Republic of Tajikistan were considered. The coagulation ability of mixed coagulant on the basis of iron and aluminium chlorides was shown. The flowsheet of obtaining of mixed coagulant from green clay of Chashma-Sang Deposit was proposed. The carried out researches have shown that mixed aluminium-iron comprising coagulant on its coagulation ability exceeds the aluminium sulphate.

[en] Present article is devoted to chromatographic separation of extracts from the roots of sorrel, rhubarb and licorice.