Composition of the standard and selective media (based on one litre of medium) used to isolate soil bacteria.

a Oil–Diesel engine oil (Rotella diesel engine oil, Shell, Montreal, QC).b Crude Oil was Coated onto the medium after solidification (from Gulf of Mexico, provided by Montreal pipeline).c Crude Oil was mixed with the growth medium (Montreal pipeline).d MgSO4 (739 mg / L), KNO3 (76 mg / L), KCl (65 mg / L), KH2PO4 (4.1 mg / L).e MnSO4*7H2O (6 mg / L), ZnSO4*7H2O (2.65 mg / L), H3BO3 (1.5 mg / L), CuSO4 (0.13 mg / L), Na2MoO4*2H2O (0.002 mg / L), KI (0.75 mg / L).Each medium contained 100 mg / L of cycloheximide.