[Water exchange in E. coli cells in the presence of D20 using IR-spectroscopy]

Time dependence of isotopic composition of intracellular water was studied by the method of infrared spectroscopy after D2O adding into outer medium of E. coli, M-17. These changes were shown to be periodic with the time of repeating of extremums near two min. Such oscillations are connected with periodic processes which take place in the cell itself under the influence of D2O and characterized a degree of viability of organisms.