TABLE 1.

Effect of betaine supplementation on the growth parameters μ_max and OD₆₂₅ at 30°C and 10°C for E. coli strains in a defined medium^a

Strain	μmax (h−1)		OD625		Δ Optical density (%)b
	30°C	10°C	30°C	10°C
E. coli DSM 30083T (without betaine)	0.45	0.024	1.43	0.46	−68
E. coli J55 (without betaine)	0.47	0.053	1.47	1.46	−1
E. coli DSM 30083T	0.44	0.061	2.02	2.46	+22
E. coli J55	0.51	0.050	2.07	3.27	+58

^aData represent mean values (n = 3).

^bΔ Optical density, change in the optical density at 10°C compared to that at 30°C.