This solution is then preferably removed from the matrix forming material by vacuum drying {HEAD ~ the layer} at {TAIL ~ an elevated temperature} 
at
This solution is then preferably removed from the matrix forming material by vacuum drying { HEAD ~ the layer } at { TAIL ~ an elevated temperature }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL