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. 2014 Jul 7;9(7):e101648. doi: 10.1371/journal.pone.0101648

Figure 1. Correlation of ammonia oxidation with the growth of Ca. Nitrososphaera evergladensis enrichment culture incubated for 21 days.

Figure 1

(A) Concentrations of ammonia and nitrite were determined spectrophotometrically. (B) Archaeal amoA gene copies were measured by quantitative PCR.