TABLE 1.

Degradation of benzene by strain RCB in the presence and absence of various hydroxyl free radical scavengers

Compound	Initial benzene concn added (μM)	Residual benzene concn after 24 h (μM)	% of initial benzene degraded after 24 h
No amendment (positive control)	35	15.7 ± 0.6	55
0.5 mM sodium iodide	35	33.2 ± 0.9	5
0.5 mM propyl iodide	35	24.5 ± 1.6	30
10 mM mannitol	35	35 ± 0.4	0
10 mM DMPOa	28.5	25 ± 1.1	12

^aDMPO, 5,5-dimethyl-1-pyrroline-N-oxide.