This mixture is then contacted with {TAIL ~ the remainder} of the electron donor or transition metal component for {HEAD ~ a second contact time} of less and 110 seconds 
This mixture is then contacted with { TAIL ~ the remainder } of the electron donor or transition metal component for { HEAD ~ a second contact time } of less and 110 seconds
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH