The comparative evaluation’s results on the efficiency of surface treatment Calligonum aphyllum (Pall.) Guerke explants, a perspective plant species in restoration degraded lands, are presented. Sterilizers «Lysoformin 3000», silver nitrate, hydrogen peroxide, and «Belizna-econom» used at introduction stage plants vitro. As result, 2 11 effective sterilization modes were found when C. was intro...

By numerically solving the appropriate Boltzmann equations, we study the production of sterile neutrinos in models with low reheating temperatures. We take into account the production in oscillations as well as in direct decays and compute the sterile neutrino primordial spectrum, the effective number of neutrino species, and the sterile neutrino contribution to the mass density of the Universe...