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. 2016 Jun 27;11(6):e0158089. doi: 10.1371/journal.pone.0158089

Fig 4. Nitrogen removal capability of strain HL at various concentrations of ammonia nitrogen.

Fig 4

Symbols: open rhombus, initial NH4+-N concentration 1100 mg/L; open squares, 600 mg/L; open triangles, 400 mg/L; open circle, 200 mg/L. Error bars: mean ± S.E. of three replicates.