Synthesis and crystal structure of a new hexagonal perovskite 7H-Ba7Li1.75Mn3.5O15.75 with Mn(4+)/Mn(5+) charge distribution.

Ba7Li1.75Mn3.5O15.

Equation of state of zircon- and scheelite-type dysprosium orthovanadates: a combined experimental and theoretical study.

Dysprosium orthovanadate, DyVO4, belongs to a family of zircon-type orthovanadates showing a phase transition to scheelite-type structures at moderate pressures below 10 GPa. In the present study, the equations of state (EOSs) for both these phases were determined for the first time using high-pressure x-ray diffraction experiments and ab initio calculations based on the density functional theory. Structural parameters for scheelite-type DyVO4 were calculated from x-ray powder diffraction data as well.

[Isolation of surface antigen of hepatites B virus].

The scheme of immunoaffinity isolation of surface antigen of hepatitis B virus is developed. Selection of monoclonal antibodies was carried out and conditions for synthesis of immunoaffinity matrix were optimized; specificity of binding of HBs-antigen with a sorbent is improved; conditions of washing of columns and elution of HBs-antigen are chosen. The yield of purified HBs-antigen obtained according to the developed scheme exceeded 90% and it allows to use such HBsAg for immunization of animals and application in immunoanalysis.