khatipovNO-SPAM at NO-SPAMuchicago.edu (EK) wrote in <TsSA9.50$P4.8194
>As far as I can understand from French, the original poster meant media.
>Then the answer is filtration through at least 0.45 micron filter.
Ah, if that's the case I recommend a 0.22 micron filter. ( The
Pharmaceutical filter standard for sterilization.)