Table 2.

Growth of C. pauculus UM1 when in the presence of either no metals, 1 mM Cu²⁺, or 0.5 mM Ni²⁺ in the phenol-mineral salts medium^a,b.

Growth condition	Time (d)
	0	3	6	0	3	6
	Growth (Abs600)	Growth (Abs600)	Growth (Abs600)	Phenol (mM)	Phenol (mM)	Phenol (mM)
Phenol	0.0018 (0.0005)	0.0800d (0.0028)	0.0715d,e (0.0038)	1.89 (0.12)	0.27d (0.01)	0.20d,e (0.01)
Phenol with 1 mM Cu2+	0.0920 (0.0094)	0.1417d (0.0118)	0.1385 (0.0324)	1.89 (0.12)	0.27d (0.02)	0.22d,e (0.00)
Phenol with 0.5 mM Ni2+	0.0025 (0.0005)	0.0769c (0.0252)	0.1793c (0.0616)	1.93 (0.18)	1.30 (0.57)	0.20d (0.00)

^aInocula were a 1 : 100 dilution of C. pauculus UM1 grown to midlogarithmic phase in 2 mM phenol-mineral salts medium. The relatively large t = 0 Abs₆₀₀ value of the phenol with 1 mM Cu²⁺ cultures was due to the blue color imparted to the medium by Cu²⁺.

^bStandard deviation values are in parentheses.

^cStatistically different from the initial (time 0) measurement at P≤ 0.05.

^dStatistically different from the initial (time 0) measurement at P≤ 0.01.

^eStatistically different from the day 3 measurement at P≤ 0.05.