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Problems of sustainable development in connection with the change of biogeochemical cycle of selenium and overcoming its deficiency in Russia, Serbia, Belarus and other countries are reported. The history of the biological role of selenium as an essential trace element is discussed. A special program of «Overcoming of selenium deficiency» has been developed by researches of Russia, Serbia and Belarus in view of high morbidity rates for cardiovascular, tumor and endemic diseases affecting the population of both the above and some other countries, including children, prevalence of selenium deficiency among livestock species and aggravation of the environmental situation as a result of man-made processes. 相似文献
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Zayonchek A. V. Brekke H. Sokolov S. Yu. Ermakov A. V. Efimov V. N. Zaraiskaya Yu. A. Akhmedzyanov V. R. Kalinin N. D. Kokhan A. V. Moroz E. A. Ol’shanetskii D. M. Razumovskii A. A. Yampol’skii K. P. 《Doklady Earth Sciences》2010,430(2):265-270
Doklady Earth Sciences - 相似文献
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Formation conditions of allivalites, olivine-anorthite crystal enclaves, in the volcanics of the Kuril-Kamchatka arc 总被引:1,自引:0,他引:1
In this paper we address allivalites, coarse-and giant-textured olivine-anorthite rocks occurring as separate blocks in the eruption products of many volcanoes from the frontal part of the Kuril-Kamchatka arc. New data are reported on the petrography, mineralogy, and composition of melt inclusions in minerals from ten allivalite samples from Ksudach, Il’inskii, Zavaritskii, Kudryavyi, and Golovnin volcanoes. The crystallization temperatures of allivalite minerals were estimated as 970–1080°C at a melt water content of 3.0–3.5 wt % and oxygen fugacity NNO = 1–2. A genetic link was established between the compositions of melt inclusions and interstitial glasses in allivalites and volcano rocks. The cumulate nature of allivalites was demonstrated. Using mass balance calculations, the degree of fractionation of primary melts during the formation of cumulate layers was estimated for various volcanoes as 22–46%. 相似文献
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Polyak B. G. Kikvadze O. E. Ermakov A. V. Hristov V. Kamenskii I. L. Lavrushin V. Yu. Nakov R. Deneva B. 《Lithology and Mineral Resources》2020,55(2):131-138
Lithology and Mineral Resources - The geothermal and hydrochemical parameters of a large hydrogeothermal system located in the city of Velingrad and its environs (southwestern Bulgaria) are... 相似文献
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Kuzmin A. V. Sadovskii I. N. Gorshkov A. A. Ermakov D. M. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(12):1751-1757
Izvestiya, Atmospheric and Oceanic Physics - An automated instrument platform is designed to install remote sensing instruments for measurements made from stationary coastal pedestals or offshore... 相似文献