Table 2 Electrical and thermal properties of deionised water and 50 g/L agar gel with 4.0 g/L NaCl at a temperature of 21 °C. The dielectric properties were measured using a dielectric assessment kit (DAK) 12 probe (4 MHz–3 GHz) from SPEAG (Zurich, Switzerland). *Based on deionised water at room temperature. **Data obtained from the IT’IS database³⁵.

\(\:\varvec{\sigma\:}\:\left[\varvec{S}\:{\varvec{m}}^{-1}\right]\)

\(\:{\varvec{\epsilon\:}}_{\varvec{r}}\)

\(\:\varvec{\rho\:}\:\left[\varvec{k}\varvec{g}\:{\varvec{m}}^{-3}\right]\)

\(\:{\varvec{C}}_{\varvec{p}}\:\left[\varvec{J}\:{\varvec{k}\varvec{g}}^{-1}{\varvec{K}}^{-1}\right]\)

\(\:\varvec{k}\:\left[\varvec{W}{\varvec{m}}^{-1}{\varvec{K}}^{-1}\right]\)