FIG. 2.

Degradation and assimilation of the emulsified PLA by the Amycolatopsis sp. strains. Strains K104-1 (□) and K104-2 (♦) were grown in PLA-emulsified mineral liquid medium at 37°C for different times. Residual PLA was hydrolyzed in 1 M NaOH at 100°C for 1 h, and the concentrations of lactic acid were quantified in triplicate for each time point as described in Materials and Methods. The concentration of PLA was also monitored for the noninoculated PLA-emulsified medium (○). The concentrations of lactic acid (mean values ± standard deviations) were calculated from three independent experiments.