FIG. 2.

Effect of Triton X-100 on biotransformation of naphthalene by Pseudomonas sp. strain 9816/11 (a) and S. yanoikuyae B8/36 (b) and of phenanthrene by Pseudomonas sp. strain 9816/11 (c) and S. yanoikuyae B8/36 (d). Triton X-100 (variable concentrations as described, prepared in a filter-sterilized 100 mM stock solution) was added to final concentrations of 0.2 mM (●), 0.5 mM (○), 1.0 mM (▾), and 2.0 mM (▿). All biotransformations were conducted in triplicate; data points show the total mean concentrations of cis-dihydrodiol metabolites present.