Before revision:  Two dielectric relaxations in the 100 Hz - 100 MHz frequency range , originating in the motion of DNA counterions, were probed as a function of DNA and Mg2+ ion concentration in added MgCl2 salt.
After revision:  Two dielectric relaxations in the 100 Hz- 100 MHz frequency range , originating in the motion of DNA counterions, were probed as a function of DNA and Mg2+ ion concentration in added MgCl2 salt.