Graduate The relation between imaginary part of permittivity to conductivity

[uzi kiko]

Hi
When I read the following article:
http://nopr.niscair.res.in/bitstream/123456789/14183/1/IJPAP%2050%286%29%20405-410.pdf

I tried to convert the value of the conductivity for saline in 500 MHz.
At the article, they present the conductivity as ε'' = 70. Which ε'' is the imaginary part of permittivity.
I would like to convert it to: σ(S/m)

I tried to use the relation between σ and ε'': ε'' = σω/ε0.
I know that σ(S/m) for 500 MHz should be between 1 and 3, but when I put the numbers in the equation :
ε0 = 8.85e-12 and w=2*pi*500e6

The numbers don't fit.
I am pretty sure that I have a problem with the units.

Thanks a lot!

 

[Dr Transport]

find the real and imaginary parts of equation 1 in the paper...