oxidizing the carboxyl acid groups of {TAIL ~ the resulting graft polymer} into {HEAD ~ percarboxyl acid groups}; and 
oxidizing the carboxyl acid groups of { TAIL ~ the resulting graft polymer } into { HEAD ~ percarboxyl acid groups } ; and
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH