Mercury content in the Siberian tiger (Panthera tigris altaica Temminck, 1844) from the coastal and inland areas of the Russia.

Being a global pollutant, mercury can originate from both natural as well as anthropogenic sources. Coastal marine atmospheric fog is considered a potential source of ocean-derived monomethylmercury (MMHg) to coastal terrestrial ecosystems. However, the ratio between mercury appearing through natural processes and that from the results of human activity is unclear.

[Research of chewing efficiency in patients with extensive acquired defects of the upper jaw after resections of nasopharyngeal zone tumors and various terms of orthopedic rehabilitation].

The aim of the study was to estimate how the quality and terms of rational dental orthopedic treatment affects masticatory efficiency in patients using obturators after extensive resections of nasopharyngeal area tumors. The analysis of indicators of masticatory efficiency in dynamics with the use of masticatory probe of V.N.