Double quantum sodium NMR studies of the halotolerant Ba 1 bacterium

Abstract

The relaxation times T 1, T 2f and T 2s, of sodium in the cytosol of the halophilic halotolerant bacterium Ba 1 isolated from the Dead Sea were measured. T 2f and T 2s, were separated by using the double quantum filtering method. The measurements were carried out at two different concentrations of the growth medium. From the spectral density ratio it seems that the microenvironment in the cytosol affecting the sodium relaxation times is similar for the two different growth media. It seems that the bacteria keep a constant microenvironment in the cytosol.