Occurrence and tissue distribution of 33 legacy and novel per- and polyfluoroalkyl substances (PFASs) in Baikal seals (Phoca sibirica).

Per- and polyfluoroalkyl substances (PFASs) are bioaccumulative and associated with adverse effects in both wildlife and humans. The occurrence of 33 PFASs was assessed in the plasma, liver, blubber, and brain of 18 Baikal seals (Phoca sibirica) (16 pups and 2 adult females) from Lake Baikal, Russia (in 2011). Of the 33 congeners analysed for: perfluorooctanosulfonic acid (PFOS), 7 long chain perfluoroalkyl carboxylic acids (C-C PFCAs) and 1 branched PFCA (perfluoro-3,7-dimethyloctanoic acid; P37DMOA) were most frequently detected.

Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia).

This study aimed to identify the factors responsible for the major ion composition of pore water from the bottom sediments of the Bratsk water reservoir, which is part of the largest freshwater Baikal-Angara water system. In the Bratsk reservoir, the overlying water was characterized as HCO-Ca-Mg type with the mineralization ranging between 101.2 and 127.

Dynamics of Trace Element Composition of Bratsk Reservoir Water in Different Periods of Anthropogenic Impact (Baikal Region, Russia).

Bratsk water reservoir is a part of the unified Baikal-Angara water system, the world's largest reservoir of surface drinking water. This study intends to assess the water quality of Bratsk reservoir by examining the spatial and temporal variability of trace element concentrations over periods of changing by the anthropogenic impact. The water samples were collected along the length of the reservoir in 2003, 2008, 2012, and 2018 and analyzed for 12 trace elements (Al, Cr, Mn, Fe, Cu, Zn, As, Cd, Cs, Pb, U, and Hg).

Differential bioaccumulation of potentially toxic elements in benthic and pelagic food chains in Lake Baikal.

Lake Baikal is located in eastern Siberia in the center of a vast mountain region. Even though the lake is regarded as a unique and pristine ecosystem, there are existing sources of anthropogenic pollution to the lake. In this study, the concentrations of the potentially toxic trace elements As, Cd, Pb, Hg, and Se were analyzed in water, plankton, invertebrates, and fish from riverine and pelagic influenced sites in Lake Baikal.

[Relationship of subclinical atherosclerosis indicators to exercise tolerance in patients with coronary heart disease].

Aim: To study the spread of a number of indicators of subclinical atherosclerosis in patients with coronary heart disease (CHD) and the pattern of their relationship to their functional state and muscle mass.

Subjects And Methods: Twenty patients with chronic forms of CHD were examined. Vascular wall stiffness was judged from pulse wave velocity (PWV) along elastic-type vessels, by calculating the carotid-femoral index (CFI).