6Don R. Durham ,Leda C. Marshall et al . Charactefizationof inorganic biocarriers that moderate system upsets duringfixed 2 film biot rcatment processes.Appl[J]. Environ. Micro2biol,1994,60:3329-3335.
7Don R. Durham ,Leda C. Marshall et al. New tom positebiocarriers engineered , to contain dsorptive and ion2ex2change properties improve immobilized 2cell bioreactor pro2cess dependability [J].Appl. Environ. Microbiol., 1994,60:4178- 4181.
8Keith E. Stormo , Ronald L. Crawford. Pie paration ofencapsulated microbial cell for environmental a pplication.Appl. Environ. Microbiol, 1992,58:727-730.