An activated microporous membrane is provided, having {HEAD ~ aldehyde functional groups} on {TAIL ~ its inner and outer surfaces} 
An activated microporous membrane is provided , having { HEAD ~ aldehyde functional groups } on { TAIL ~ its inner and outer surfaces }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL