Temperature dependence of DNA dielectric dispersion at radiofrequency |
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Authors: | F Pedone A Bonincontro |
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Institution: | Dipartimento di Genetica e Biologia Molecolare, Università di Roma, La Sapienza, Italy. |
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Abstract: | We have studied the dielectric behavior of DNA aqueous solutions at various ionic strengths and in the presence of the specific DNA ligand ethidium bromide, in the frequency range 1 MHz-1 GHz, at different temperatures ranging from 5 to 40 degrees C. The activation enthalpies of the dielectric relaxations studied were obtained by Arrhenius plots of In(tau T)-1 vs. T-1. The results are consistent with a counterion fluctuation model as previously developed by Mandel and colleagues. |
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