The electric capacity of suspensions of red corpuscles of a dog
The electric capacity of suspensions of red corpuscles of a dog
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DOI：
10.1103/physrev.26.682
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发表时间：
1925-11-01
期刊：
影响因子：
--
通讯作者：
Fricke, H
中科院分区：
文献类型：
--
作者：
Fricke, H
用电桥进行测量，使用替代方法，通过该方法将悬浮液与具有与悬浮液相同的比电阻的稀释血清间接比较。电桥的频率范围为800至4，500，000周波，其灵敏度使得在最低频率下可以测量与100欧姆并联的电容，精度为几μ μ f。测量频率为每秒87，000个周期。由狗的红细胞悬浮液制成，体积浓度在10%至88%之间，证实了先前推导的公式C（ρ）= C 100（1-r 1 r）。通过这些测量和前面的公式C 0= C100 aq，计算出红细胞每平方厘米表面的容量为。81 μ f。该容量与3600至4，500，000次循环之间的频率无关，并且也与悬浮液无关。这可能是包围微粒的膜的静态容量。根据这一假设并使用3作为介电常数，膜的厚度为3.3× 10− 7 cm（单分子）。
Measurements were made with a bridge, using a substitution method where-by the suspension is indirectly compared with a diluted serum which has the same specific resistance as the suspension. The bridge may be used with frequencies ranging from 800 to 4,500,000 cycles and its sensitivity is such that a capacity in parallel to 100 ohms can be measured with an accuracy of a few μ μ f at the lowest frequency. Measurements with a frequency of 87,000 cycles per sec. were made of suspensions of red corpuscles of a dog with volume concentrations between 10 and 88 percent, confirming the formula C (ρ)= C 100 (1− r 1 r) previously derived 1. By these measurements and the previous formula C 0= C 100 aq the capacity per cm 2 of surface of a red corpuscle is calculated to be. 81 μ f. This capacity is independent of frequencies between 3600 and 4,500,000 cycles and is also independent of the suspending liquid. It is probably the static capacity of the membrane which surrounds the corpuscle. According to this assumption and using 3 for the dielectric constant, the thickness of the membrane is 3.3× 10− 7 cm (monomolecular).