Dipartimento di Fisica, Università degli Studi di Perugia, Via Pascoli, I-06123 Perugia, Italy.
J Chem Phys. 2011 Jul 14;135(2):025101. doi: 10.1063/1.3609101.
The coherent density fluctuations propagating through DNA hydration water were studied by neutron scattering spectroscopy. Two collective modes were found to be sustained by the aqueous solvent: a propagating excitation, characterised by a speed of about 3500 m/s, and another one placed at about 6 meV. These results globally agree with those previously found for the coherent excitations in bulk water, although in DNA hydration water the speed of propagating modes is definitely higher than that of the pure solvent. The short-wavelength collective excitations of DNA hydration water are reminiscent of those observed in protein hydration water and in the amorphous forms of ice.
通过中子散射光谱学研究了在 DNA 水合水中传播的相干密度涨落。发现水溶剂维持着两种集体模式：一种传播激发，其速度约为 3500 m/s，另一种位于约 6 meV。这些结果与以前在体相水中发现的相干激发结果总体上一致，尽管在 DNA 水合水中传播模式的速度明显高于纯溶剂。DNA 水合水中短波长的集体激发类似于在蛋白质水合水中以及非晶冰形式中观察到的那些激发。
