Active moss biomonitoring of airborne potentially toxic elements in recreational areas of Moscow.

Active biomonitoring using the moss bag technique was applied to examine the atmospheric deposition of potentially toxic and other elements in recreational areas of Moscow. Moss bags with Sphagnum girgensohnii were placed in the territory of seven parks (Losiny Ostrov, Victory Park, Ostankino, Sokolniki, Izmailovo, Kuzminki-Lyublino, Tsaritsyno) at three locations in each park from June to September 2018. The content of 32 chemical elements: Na, Mg, Al, Cl, K, Ca, Sc, V, Mn, Fe, Co, Zn, As, Br, Rb, Sr, Mo, Sb, Cs, Ba, La, Sm, Tb, Hf, Ta, W, Au, Th, U, Cu, Pb, and Cd in moss samples was determined by instrumental neutron activation analysis and atomic absorption spectrometry.

Efficient Removal of Metals from Synthetic and Real Galvanic Zinc-Containing Effluents by Brewer's Yeast .

The performance of the brewer's yeast to remove metal ions from four batch systems, namely Zn(II), Zn(II)-Sr(II)-Cu(II), Zn(II)-Ni(II)-Cu(II), and Zn(II)-Sr(II)-Cu(II)-Ba(II), and one real effluent was evaluated. Yeast biosorption capacity under different pH, temperature, initial zinc concentration, and contact time was investigated. The optimal pH for removal of metal ions present in the analyzed solution (Zn, Cu, Ni, Sr, and Ba) varied from 3.

Contribution of Hydrogen Sulfide to Dilation of Rat Cerebral Arteries after Ischemia/Reperfusion Injury.

The study examined the effect of HS on the tone of cerebral arteries in rats after global cerebral ischemia/reperfusion injury and cooperation between NO and HS in the control over cerebral circulation during the postischemic period. In control sham-operated and in experimental rats with ischemia/reperfusion injury, the diameter of pial arteries was repeatedly measured in vivo under a light microscope after removal of parietal bone and dura mater in 1 h and in 7 days after the surgery. The study established that HS is an important signaling molecule in pial arteries, where it is responsible for vasodilation.

Zinc removal from model solution and wastewater by Arthrospira (Spirulina) Platensis biomass.

The biosorption of zinc from model solution as well as wastewater by Arthrospira (Spirulina) platensis biomass was studied. Adsorption capacity of the biosorbent was investigated as a function of contact time between adsorbent and zinc, the initial metals and sorbent concentration, pH value, and temperature. The ability of Arthrospira biomass for zinc biosorption exhibited a maximum at the pH range 4-8.

[Lipid peroxidation of the bile in patients with calculous and acalculous cholecystitis].

With a new technique for the assessment of lipid peroxidation products in chloroform bile extracts it was possible to register an increase in the ratio malonic dialdehyde/phospholipids in patients with both calculous and acalculous cholecystitis. Bile of all patients with acute cholecystitis was characterized by a decrease in concentration of all the components, but use of relative parameters (malonic dialdehyde/phospholipids, index of bilirubin fractions and cholesterol/lecithin index) allows to verify the stage of the inflammation. The changes were unidirectional in B-bile and C-bile portions in all the patients with acalculous cholecystitis.