[Professional psychological selection system in the Air Force - 50 years].

Given the data about the establishment of the professional psychological selection system in the Air Force in 1958-1964 in the NIIIAM Air Force by the team psychological department under the leadership of K.K.Platonova.

[Fractionation of hydrogen stable isotopes in the human body].

Fractionation of hydrogen stable isotopes was studied in 9 human subjects in a chamber with normal air pressure imitating a space cabin. Mass-spectrometry of isotopes in blood, urine, saliva, and potable water evidenced increases in the contents of heavy H isotope (deuterium) in the body liquids as compared with water. These results support one of the theories according to which the human organism eliminates heavy stable isotopes of biogenous chemical elements.

[Investigation into fractionating of hydrogen and oxygen stable isotopes aboard the international space station].

Results of isotope investigations of atmospheric condensate and potable water supplied from Earth confirmed the fractionating of hydrogen and oxygen stable isotopes in the organism of ISS crewmembers. Samples of ISS atmospheric condensate were characterized by altered concentrations of 18O2 and deuterium. Atmospheric deuterium quantities varied in the interval of -67 to 79 +/- 3 ppm, whereas water deuterium made up -85 +/- 3 ppm as compared with SMOW.