Foster K R, Schepps J L, Schwan H P
Biophys J. 1980 Feb;29(2):271-81. doi: 10.1016/S0006-3495(80)85131-9.
The dielectric permittivity and conductivity of muscle fibers from the giant barnacle, Balanus nubilus, have been measured at 1, 25, and 37 degrees C, between 10 MHz and 17 GHz. The dominant microwave dielectric relaxation process in these fibers is due to dipolar relaxation of the tissue water, which shows a characteristic relaxation frequency equal to that of pure water, ranging from 9 GHz (1 degree C) to 25 GHz (37 degree C). The total permittivity decrease, epsilon 0 -- epsilon infinity, due to this process accounts for approximately 95% of the water content of the tissue; thus, the major fraction of tissue water is dielectrically identical to the pure fluid on a picosecond time scale. A second dielectric process contributes significantly to the tissue dielectric properties between 0.1 and 1--5 GHz, and arises in part form Maxwell-Wagner effects due to the electrolyte content of the tissue, and in part from dielectric relaxation of the tissue proteins themselves.
已在1℃、25℃和37℃下，于10兆赫至17吉赫范围内测量了大型藤壶（Balanus nubilus）肌肉纤维的介电常数和电导率。这些纤维中主要的微波介电弛豫过程是由于组织水的偶极弛豫引起的，其特征弛豫频率与纯水的弛豫频率相同，范围从9吉赫（1℃）到25吉赫（37℃）。由于该过程导致的总介电常数下降，即ε0 - ε∞，约占组织含水量的95%；因此，在皮秒时间尺度上，组织水的主要部分在介电性质上与纯液体相同。第二个介电过程在0.1至1 - 5吉赫之间对组织介电性质有显著贡献，部分源于组织电解质含量引起的麦克斯韦-瓦格纳效应，部分源于组织蛋白质本身的介电弛豫。
