Schwan H P, Foster K R
Biophys J. 1977 Feb;17(2):193-7. doi: 10.1016/S0006-3495(77)85637-3.
Dielectric permitivity and conductivity data are reviewed for tissue over the frequency range of 0.1-10 GHz. The conductivity of muscle increases quadratically with frequency above 1 GHz, suggesting a Debye relaxation for tissue water centered at 20 GHz at room temperature, the same as for bulk water. Approximate mixture equations suggest that this "free" water accounts for about 70% of the tissue weight, showing that most of the tissue water has rotational mobilities similar to those in the bulk fluid.
本文综述了0.1-10GHz频率范围内组织的介电常数和电导率数据。肌肉的电导率在频率高于1GHz时随频率呈二次方增加，这表明在室温下组织水以20GHz为中心存在德拜弛豫，与体相水相同。近似混合方程表明，这种“自由”水约占组织重量的70%，这表明大部分组织水具有与体相流体中相似的旋转迁移率。
