Table 3 Summary of hydration dynamics of the initial hydration process as a function of temperature according to the first order kinetics model.

From: Skin hydration dynamics investigated by electrical impedance techniques in vivo and in vitro

T (°C)

Conductance

1 kHz

MIX

\(k\)

Time

R2

\(k\)

Time

R2

\(k\)

Time

R2

12

0.0057

9

0.985

0.0085

6

0.998

–

–

–

22

0.0048

11

0.962

0.0080

6

0.964

0.0034

15

0.904

32

0.0054

9

0.996

0.0072

7

0.990

0.0027

18

0.836

42

0.0044

12

0.993

0.0074

7

0.999

0.0033

15*

0.997

52

0.0034

15

0.946

–

–

–

0.0026

19*

0.903

72

0.0046

11

0.978

–

–

–

0.0025

20*

0.984

  1. The calculated parameters are based on impedance measurements with the 4E setup according to Eqs. (1) and (2) using input data of 4E conductance at 251 kHz, 4E resistance at 1 kHz, and 4E MIX index based on impedance at 1 kHz and 10 kHz. In these calculations, the \(\alpha\) values were obtained between 0 and 16 min. However, times marked with * indicate that \(\alpha\) were obtained between 0 and 6 min, due to deviating behavior at longer times.
Back to article page