June 8, 2018, at a meeting of a scientific seminar on differential and functional-differential equations under the supervision of Professor A.L. Skubachev (Mathematical Institute n.a. Nikolsky) prof.Yakov Sinai made a report: "Navier-Stokes System and Renolmalization Group Theory".
Y. Sinai is a laureate of many prestigious Russian and international prizes. He was awarded the A.Markov Prize. (1989), the Heinemann Prize (1990), the Israeli Wolff Prize (1996), the J. Moser Prize (2001), the Nemmers Prize (2002), the Henri Poincaré Award (2009) and others, as well as L. Boltzmann medal 1986) and P. Dirac medal (1993). In 2013, he received the Leroy Steele Award of the American Mathematical Society. In 2014, the Academy of Sciences of Norway awarded him the Abel Prize.
The main works of the professor lie in the field of both mathematics and mathematical physics, especially probability theory, the theory of dynamical systems, ergodic theory, and other mathematical problems of statistical physics. Of great importance are his works on geodesic flows on surfaces of negative curvature. Many achievements in the field of mathematics are named after him, including such as the Kolmogorov-Sinai entropy, the Sinai billiards, the Sinai random walk hypothesis, the Sinai-Bowen-Ruel measure and the Pirogov-Sinai theory. A large series of works is devoted to the theory of scattering billiards - "Sinai billiards".
At the seminar professor shared the latest results of scientific research on the Navier-Stokes equations and the new mathematical apparatus (Renolmalization Group Theory), allowing to advance in the study of the global solvability of the Navier-Stokes equations.
RUDN soil scientists have revealed a direct correlation between the rate of soil formation of carbon dioxide, called CO2 emissions, and the content of microbial biomass in it. It is known that CO2 emission from soil is mainly conditioned by respiration of soil microorganisms and plant roots. The more CO2 soil emits, the more microbial biomass it usually contains. It was shown that CO2 emission by chernozem of different ecosystems (or different types of land use) correlates with the content of microbial biomass, and most closely with the rate of its microbial respiration. And the soil with good microbial properties has the “best quality”, is more fertile, provides the highest yield of crops and other plant biomass.
A RUDN chemist has synthesized a catalyst for the production of gamma-valerolactone — an energy-intensive “green” biofuel. The catalyst based on zirconium dioxide and zeolite has shown high efficiency in converting the waste of wood plant materials — methyl levulinate — to gamma-valerolactone.
Biochemists from RUDN University determined which substances in peach leaves provide the antioxidant effect their extract has. They investigated the composition of the powders obtained from leaves of several varieties of peach and found that high polyphenol content correlates with antioxidant properties. The results will help start production of antioxidants from natural sources.