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[nafex] hormones through clay pots

Since no one responded to Tom's question about hormones passing 
through clay pots, I'll just add a little- 
when doing tissue culture, since hormones are destroyed by heat and 
can't be sterilized using pressure cookers or the like, extremely 
fine filters are used to sterilize the hormone mixture. Hope this 
gives you a general idea of the permeability of these hormones, as 
far as how small the pores in clay pots are, I haven't a clue, but if 
you can find out I can look up how fine the tissue culture filters 
are used to sterilize the mixes, if you really want to know.

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