Table 3.

The cell viability modifications of Gram-positive and Gram-negative bacteria in the presence of mixture of saturated, monoaromatic and polyaromatic hydrocarbons

Bacterial strain	Variant:
	Control		Mixture of saturated hydrocarbon1 (5% v/v)		Mixture of monoaromatic hydrocarbons2 (0.5% v/v)		Mixture of polyaromatic hydrocarbons3 (5% v/v)
	OD6604	CFU ml-1*	OD6604	CFU ml-1*	OD6604	CFU ml-1*	OD6604	CFU ml-1*
Mycobacterium sp. IBBPo1	0.893	2.1×109	0.369	2.1×104	0.150	1.4×10	0.250	1.2×102
Oerskovia sp.IBBPo2	0.984	2.3×109	0.650	2.1×106	0.395	3.3×104	0.177	2.6×102
Corynebacterium sp. IBBPo3	1.010	2.6×109	0.745	3.2×107	0.185	1.2×102	0.235	1.6×103
Chryseomonas sp. IBBPo7	0.996	2.5×109	0.735	2.0×107	0.786	2.4×107	0.311	1.1×103
Pseudomonas sp. IBBPo10	1.498	3.6×109	1.141	1.3×109	0.809	3.4×107	0.511	2.5×105
Burkholderia sp. IBBPo12	0.938	2.4×109	0.712	3.2×108	0.622	1.2×106	0.705	1.5×107

Legend: ¹ = mixture of n-hexane, n-hexadecane, cyclohexane; ²= mixture of benzene, toluene, ethylbenzene; ³ = mixture of naphthalene, 2-methylnaphthalene, fluorene; ⁴ = the intensity of bacterial growth on liquid LB-Mg medium, were determined by spetrophotometric measurement of the optical density (OD₆₆₀) after 24 hours incubation at 28°C on a rotary shaker (150-200 rpm); ^* = serial dilutions of culture liquid were spread on agar LB-Mg medium and the number of viable cells (CFU ml^-1) was determined after 24 hours incubation at 28°C.