Pedone F, Bonincontro A
Dipartimento di Genetica e Biologia Molecolare, Università di Roma, La Sapienza, Italy.
Biochim Biophys Acta. 1991 Apr 9;1073(3):580-4. doi: 10.1016/0304-4165(91)90233-7.
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.
我们研究了在1MHz - 1GHz频率范围内，于5至40摄氏度的不同温度下，各种离子强度且存在特定DNA配体溴化乙锭的情况下，DNA水溶液的介电行为。通过对ln(τT)⁻¹与T⁻¹作阿累尼乌斯图，得到了所研究的介电弛豫的活化焓。结果与Mandel及其同事之前提出的反离子涨落模型一致。
