Biomedical Engineering Reference
In-Depth Information
R
m
+
R
el
10
9
10
8
10
7
10
6
10
5
R
el
10
4
10
3
A
10
2
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
10
6
f
/ Hz
B
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
100
200
300
400
500
c
cation
/ mM
Figure 9. A) Impedance spectra (|
Z
|(
f
)) in the frequency range of 10
6
-10
-2
Hz
after addition of valinomycin in (Ŷ) TMA buffer and in the presence of (Ƒ)
TMA buffer containing 500 mM KCl. The membrane capacitance slightly
changed in the range of (0.23 ± 0.04) μF cm
-2
. B) Conductance plotted vs. in-
creasing concentrations of KCl (Ɣ) and NaCl (ż) in the bulk phase. The solid
lines are the results of linear regressions.
47
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