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(a) Real component of complex conductivity spectra, in the inset the same curves are displayed in log-log plots, and (b) loss tangent spectra of a DNA cast film irradiated for different periods of UV irradiation time.
Real component of conductivity at 1 MHz, plotted as a function of irradiation time. The solid line is the fit of experimental data to a decay exponential curve.
Infrared absorbance spectra of a DNA cast sample irradiated with 254 nm UV light for different periods of time.
Absorbance at 1088 cm−1 associated with symmetric PO2 − stretching of backbone vibrations and concentration of pair sites calculated by Eq. (2) as a function of irradiation time.
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