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Oil impact on mollusks` Mya arenaria and Macoma balthica burrowing reaction

Nowadays water areas pollutions, connected with oil and petroleum products, occur quite often. This is the pressing challenge for arctic and boreal seas, in particular for the White Sea, because some of its parts are polluted with petrol products. That …

Centered figurate numbers

In this work figurate numbers on a plane and figurate numbers in a space were analyzed, as well as new figurate numbers (centered cubic numbers) were made. Common properties and features were revealed and the comparative analysis was made. When …