Variables: concentration total_cell_concentration Substances: Nitrogen (InChI=1S/N2/c1-2) Oxygen (InChI=1S/O2/c1-2) Sulfate (InChI=1S/H2O4S/c1-5(2,3)4/h(H2,1,2,3,4)/p-2 Nitrate (InChI=1S/NO3/c2-1(3)4/q-1) Keywords: noble gases groundwater riparian zone