title: Diurnal patterns of ammonium and un-ionized ammonia in streams receiving secondary treatment effluent.
authors: Department of Botany, Iowa State University, Ames 50011.
authors: W G
authors: WG
authors: Crumpton
authors: T M
authors: TM
authors: Isenhart
mesh_terms: D000641:Ammonia / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D010507:Periodicity; D010788:Photosynthesis; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D013696:Temperature; D014877:Water Pollution, Chemical / Q000032:analysis*
chemical_list: D000644:Quaternary Ammonium Compounds; D000641:Ammonia