Abatrct:A microbial strain that could degrade polyacrylamide and grow on HPAM as the sole source of carbon was isolated from reservoirs after polymer flooding in Daqing oilfield.This strain was named as QSJU001.Appraised by the strain 16 SrDNA molecular biology,its alignment of 16 SrDNA sequence had 99%similarity with those of the first ten strains of nearest heredity distance in GeneBank.Using16 SrDNA sequence and the first ten strains of 16 SrDNA sequence to create a phylogenetic tree,wefound that nucleot...