The article presents the results on species composition of segetal component in different climatic zones Tyumen region based an assessment research data period 2017-2019. study weed flora was carried out crops spring wheat Aromashevsk and regions. is represented by that are most often observed these areas during phytosanitary monitoring. At same time, greatest variety plant adapted to grow agri...

The coastal mosquito Aedes togoi occurs more or less continuously from subarctic to subtropic zones along the coasts of the Japanese islands and the East Asian mainland. It occurs also in tropical Southeast Asia and the North American Pacific coast, and the populations there are thought to have been introduced from Japan by ship. To test this hypothesis, the genetic divergence among geographic ...

Humic acids extracted from different soils. The stability constants of metal humates and acid dissociation constant humic acids were calculated. Forms of metals in natural waters was determined with use account their chemical composition and content and properties of organic matter. We assessed metals speciation in water objects with account for competitive reactions resulting in formation of h...