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Developing devices for dust suppression one should consider important factors, such as the size distribution of transferred dust, duration of exposure in residential areas. Often the total amount of dust emissions may exceed the estimated figure for maximum permissible emissions, but their share transferred in sanitary protection zone of dust is negligible. Tailing dump of Kovdor MPE is one of the largest in Russia. The construction of dust dispersion halos was performed using a universal program calculation of air pollution "Ecolog" (Russia). Based on a comparison of dispersed compositions tails similar in composition tailing dumps in Russia, it can be concluded that in the beach area of the Kovdor dump share of dust tranfered to the territory of settlements has ranged from 10 to 40%. It was found that the maximum diameter of the particles carried by the territory of the city under consideration is 50 microns. We can conclude that under the conditions of the object the development of special devices for dust suppression is required. [ABSTRACT FROM AUTHOR]

The accumulation of vitamin C (ascorbic acid) in fresh Echinacea purpurea plants grown in a non-chernozem zone of Russia in 2009 - 2010 in addition to its component parts, juice, and pulp was analyzed as a function of age (2 - 7 years) and year of collection. Leaves accumulated the most ascorbic acid; stems, the least. The vitamin C concentration in juice from fresh plants collected in 2009 was much greater than that in the herb. The vitamin C content in juice from 3-, 4-, and 5-year-old plants collected in 2010 was the same as in the herb. Fresh pulp was characterized by a lower vitamin C content than the fresh plant and juice according to results from a two-year experiment. [ABSTRACT FROM AUTHOR]