Fig. 2From: Assessment of the effects of phenanthrene and its nitrogen heterocyclic analogues on microbial activity in soilCumulative CO2 production in phenanthrene amended soil following amendment with glucose substrate during the 0–90 days incubation period. Data shows: 0 mg kg−1 (filled square), 10 mg kg−1 (open triangle), 100 mg kg−1 (filled down-pointing triangle), 250 mg kg−1 (open circle) and 500 mg kg−1 (filled circle)Back to article page