TABLE 4.

Average optical densities for biomass and respiration of T. hamatum grown with or without DDT^a

Substrate	Respiration			Biomass
	Avg OD		P	Avg OD		P
	Control	+DDT		Control	+DDT
A3 N-acetyl-d-galactosamine	0.56 B	0.60 A	0.03	0.07 A	0.08 A	0.29
A11 arbutin	1.70 B	1.77 A	0.03	0.84 A	0.86 A	0.27
B1 α-cyclodextrin	0.32 A	0.35 A	0.07	0.30 B	0.32 A	0.04
B4 i-erythritol	1.70 A	1.49 B	0.04	0.95 A	0.72 B	0.04
C1 glucose-1-phosphate	0.85 B	0.88 A	0.05	0.19 B	0.24 A	0.00
H6 l-serine	1.05 A	1.07 A	0.67	0.35 B	0.37 A	0.04
H9 putrescine	0.79 A	0.81 A	0.64	0.07 B	0.11 A	0.01

^aOnly the substrates with significant different values (post hoc Student-Newman-Keuls test) for either respiration or biomass or both are listed. Average values for control and +DDT with the same letter are not significantly different (P < 0.05). OD, optical density. n = 4 per inoculum.