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A scatter plot showing the relationship between mass 27 and mass 26 signal intensities of bacterial cells detected by SIMS in soils exposed to 12 doses of 13C-phenol (□) or 12C-phenol (■). The signal intensities of 481 regions of interest (ROIs) from images of soil receiving 12C-phenol and 327 ROIs from images of soil receiving 13C-phenol were measured with Metamorph® software.
