In this embodiment the asymmetric membrane in {HEAD ~ the form} of {TAIL ~ a flat disc} is mounted in a leak proof manner against a porous collection support 
of
In this embodiment the asymmetric membrane in { HEAD ~ the form } of { TAIL ~ a flat disc } is mounted in a leak proof manner against a porous collection support
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH