TABLE 1.

Relative growth rates^a of E. coli JB23 following physical and chemical stress

Stress	Condition(s)	Relative rate in growth medium:
		LB	Glucose	Pyruvate	Glycerol
Heat shock	37 → 45→ 37°C	0.93	0.77	0.89	NDb
	37 → 45°C	0.85	0.50	0.62	ND
Chemical stress:
Phenol	5 mM	0.81	0.85	ND	0.80
	10 mM	0.53	0.44	ND	0.46
2-Chlorophenol	0.25 mM	0.91c	0.99c	ND	ND
	0.5 mM	0.86	0.90	ND	ND
	1.0 mM	0.83	0.70	ND	ND
	1.5 mM	0.71	0.51	ND	ND
Ethanol	0.21 mM	0.91c	0.99c	ND	ND
2,4-Dichlorophenol	0.1 mM	0.71	0.48	ND	ND
	0.2 mM	0.48	0.39	ND	ND

^aMeans of at least two experiments are shown. The results are expressed relative to the growth rate of the unstressed control. 

^bND, not determined (experiment not carried out). 

^cThese values are not significantly different (t test) from the control.