骨骼肌细胞的介电弛豫特性  

Dielectric Dispersion Property of Skeletal Muscle Cells

作　　者：马青[1] 王立洪[2] 崔湘屏[1] 侯晓荣[2] 

机构地区：[1]宁波大学医学院生理学科,浙江宁波315211 [2]宁波大学理学院数学系,浙江宁波315211

出　　处：《中国医学物理学杂志》2004年第5期272-275,共4页Chinese Journal of Medical Physics

基　　金：浙江省自然科学基金(M303044);浙江省教育厅资助项目(20030471)

摘　　要：在100Hz～100MHz频率范围内,利用非线性数值计算和曲线拟合分析,验证了蛙离体骨骼肌细胞的介电弛豫特性满足Cole-Cole公式(误差≤3.45%),通过频域介电谱、Cole-Cole图、介电损耗因子和介电损耗角正切频率谱的曲线拟合分析,确定了蛙骨骼肌细胞的Cole-Cole介电参数:高频段相对介电常数εh=78,第一相对介电增量△εl=113000,第二相对介电增量△ε2=45000,第一特征频率fC1=9kHz,第二特征频率fC2=158kHz,第一相位角β1=0.881,第二相位角β2=0.984,低频段电导率κL=0.55mS/cm,常数A=35,常数m=1.08。The dielectric dispersion of frog skeletal muscle cells was proved to fit the Cole-Cole formula(relative residual error≤3.45%) via nonlinear numerica l calculation and curve fitting analysis within the frequency range of 100 Hz～1 00 MHz. The Cole-Cole dielectric parameters of frog skeletal muscle cells were d etermined by curve fitting analysis of the frequency range dielectric spectrosco py, the Cole-Cole plots, the loss factor and the loss tangent: the relative per mittivity at high frequency εh=78, the first relative permittivity increment △ ε1=113000, the second relative permittivity increment △ε2=45000, the first ch aracteristic frequency fC1=9 kHz, the second characteristic frequency fC2=158 kH z, the first phase angle β1=0.881, the second phase angle β2=0.984, conductivi ty at low frequency κL=0.55 mS/cm, A=35, m=1.08.

关 键 词：骨骼肌 介电弛豫 电导率 相对介电常数 Cole-Cole公式 

分 类 号：Q64[生物学—生物物理学]