Advances of DGGE/TGGE Technique for Soil Microbial Diverisity Study Diversity analysis of the largest subunit of the multi-component phenol hydroxylase (LmPH) gene from the phenol degrading microbial communities of an aeration tank of a coking wastewater treatment plant Population dynamics and community structure of bacteria in an industrial phenol-degrading process analyzed with Temperature Gradient Gel Elec trophoresis (TGGE)