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39.479  Articles
1 of 3.949 pages  |  10  records  |  more records»
he objective of the paper was determining biogeochemical peculiarities of ac- cumulation of chemical elements (Mn, Ni, ?o, V, Cr, Zr, Cu, Pb, Zn, Ba, P) by wild-grow- ing shrubs (stems and leaves) – bog bilberry (Vacc?nium uligin?sum), European blueberry ... see more

The distribution of mineral deposits and the distribution of chemical elements on the globe are characterized by heterogeneity. A wide range of publications of domestic and foreign specialists - geologists, geographers, geochemists, economists - were dedi... see more

Bartoshyk, N.V. ??????-??????? ?????????????? ???????????? ??????????, ??????????? ???????????? ????????? ??????? 8?57 ??, ?? ?????????? ????????????? ??????, ? ????????? 50 ? ?? 100 ?, ?? ???????????? ????????? ??????????? ???????? ????????? ? ???????? ?... see more

Formulation of the problem. The achievement of high mechanical properties of the railway wheel rim made from carbon steel is ensured by the highly dispersed perlite structure formation in it and a small amount of pre-eutectoid ferrite, which is allocated ... see more

The aim of the article is a hardening of the surface steel layers due to the combination treatment. Samples of steel 38Cr2MoAl were hardened by complex chemical and thermal treatment such as carburizing and subsequent boriding. It was established that sur... see more

The aim of the article is a hardening of the surface steel layers due to the combination treatment. Samples of steel 38Cr2MoAl were hardened by complex chemical and thermal treatment such as carburizing and subsequent boriding. It was established that sur... see more

This work focuses on the distribution and the controlling factors of rare earth element (REE) total concentrations and fractionation patterns in fine sediment fractions of 53 samples collected along the main channels of the Ria de Aveiro, a northern Portu... see more

An experimental study of the sorption capacity of the soil-absorbing complex and buffer of the main types of soils in Ukraine was carried out. This comparative characteristic of solvent ability of extractants is given and the most suitable ones are propos... see more

The objective of this study was to evaluate the variations of twelve chemical elements (Ni, Fe, Co, Mg, Mn, Al, Si, Zn, Ti, P, Ca and Cr) in laterite soil profiles from Wantulasi area in South East Sulawesi Province of Indonesia. Eighty four (84) samples ... see more

1 of 3.949 pages  |  10  records  |  more records»