Fig. (4) Degradation of PAHs by fungus strain HESHAM-1 in in solutions of PAHs mixture. The initial concentration of each PAH was: naphthalene, 6.35 mg l–1; phenanthrene, 6.55 mg l–1; chrysene, 1.54 mg l–1; benzo(a)pyrene, 3.21 mg l–1. Each point represents mean ± S.E. of triplication.