Speciation of inorganic selenium in natural water by solid-phase extraction using functionalized silica.

Functionalized adsorbents with poly-(4,9-dioxododecane-1,12-guanidine) (SiO-PDDG) and mercaptophenyl groups (MPhS) were used for the separation of Se(VI) and Se(IV) for the first time. Fixation of PDDG was characterized by capillary electrophoresis and TGA/DSC. The quantitative extraction of Se(VI) proceeded due to anion exchange at pH 3-7.

"Flora of Russia" on iNaturalist: a dataset.

Background: The "Flora of Russia" project on iNaturalist brought together professional scientists and amateur naturalists from all over the country. Over 10,000 people were involved in the data collection.

New Information: Within 20 months, the participants accumulated 750,143 photo observations of 6,857 species of the Russian flora.

Morphological, functional, and psychological development of children living permanently in the Tyva Republic.

For estimation of national-ethnic features of the development of young school-children, 1,928 children 8-11 years old of the Russian and Tuvinian ethnicity permanently living in urban and rural areas of the Tyva Republic were studied. The level of physical development, parameters of cardio-respiratory system, psycho-physiological status, functional asymmetry of brain, memory and attention were estimated. It was established that despite accelerated development of all children, Tyvinian schoolboys have lower parameters of physical and mental development, but a higher level of functional condition of cardiovascular and respiratory systems in comparison with Russian children.