Microwave dielectric relaxation in muscle. A second look.
Microwave dielectric relaxation in muscle. A second look.
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肌肉中的微波介电松弛。
DOI：
10.1016/s0006-3495(80)85131-9
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发表时间：
1980
影响因子：
3.4
通讯作者：
Schwan,HP
中科院分区：
文献类型：
--
作者：
Foster,KR;Schepps,JL;Schwan,HP
巨型藤壶 Balanus nubilus 肌肉纤维的介电常数和电导率已在 1、25 和 37 摄氏度、10 MHz 至 17 GHz 之间进行了测量。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，其特征弛豫频率与纯水相同，范围从 9 GHz（1 摄氏度）到 25 GHz（37 摄氏度）。总介电常数降低，ε0——ε无穷大，由于这个过程约占组织含水量的95%；因此，组织水的主要部分在皮秒时间尺度上与纯流体的介电特性相同。第二介电过程对 0.1 和 1--5 GHz 之间的组织介电特性有显着贡献，并且部分由于组织的电解质含量而以麦克斯韦-瓦格纳效应的形式产生，部分由组织蛋白质本身的介电弛豫产生。
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.