TABLE 1.

Ratios of PAHs to oleanane and concentrations of DBTs, NPHs, and hopanes remaining after 14 and 50 days of incubation with pyocyanin-amended or unamended DLC enrichment cultures

Incubation time and culture	PAH/ oleanane ratioa	Concn (ng ml of oil−1) ± SEMb
		DBT	C1 DBT	C2 DBT	C3 DBT	C1 NPH	C2 NPH	C3 NPH	C4 NPH	C29 hopane	C30 hopane
14 days
DBLCc	9.5 ± 0.7	41 ± 1	196 ± 5	233 ± 15	179 ± 6	28 ± 14	527 ± 118	1,495 ± 145	1,315 ± 5	849 ± 63	1,245 ± 105
Dd	7.5 ± 0.9	36 ± 8	182 ± 5	167 ± 34	157 ± 15	1 ± 1	51 ± 13	533 ± 66	742 ± 51	939 ± 42	1,380 ± 40
D/Pe	9.7 ± 0.7	55 ± 0	226 ± 15	229 ± 5	174 ± 5	13 ± 6	380 ± 84	1,225 ± 105	1,225 ± 5	773 ± 63	1,165 ± 85
50 days
DBLC	8.1 ± 0.8	47 ± 4	222 ± 2	264 ± 2	173 ± 8	34 ± 30	538 ± 289	1,314 ± 346	1,198 ± 203	863 ± 8	1,390 ± 10
D	6.3 ± 1.1	27 ± 1	168 ± 6	181 ± 6	178 ± 12	1 ± 1	108 ± 54	816 ± 178	1,041 ± 160	389 ± 14	730 ± 3
D/P	8.6 ± 0.6	32 ± 5	157 ± 5	164 ± 14	148 ± 8	20 ± 17	434 ± 206	1,395 ± 365	1,445 ± 245	938 ± 93	1,500 ± 100

^aConcentrations of PAHs were normalized to oleanane as a measure of PAH degradation.

^bThe data are for triplicate samples. C₁ to C₄ represent carbon numbers of alkyl groups in alkylated homologues.

^cUninoculated control.

^dUnamended DLC cultures.

^ePyocyanin-amended DLC cultures.