Figure 6.
Bacterial density adhered to the surface of the PLA samples. The smooth bars are those given to the non-degraded samples, the diagonally hatched bars are for the samples degraded for one month, and lastly, the notched bars are for the samples degraded for 3 months. Likewise, the color given to each bar represents the viability of the adhered bacteria, green for the viable ones and red for the damaged ones. Statistical difference (p < 0.05) is marked with the different letters depending on which sample it is compared with. The letters A is used to 0/00; B is used to 0/10; C is used to 0/50; D is used to 3/00; E is used to 3/10; F is used to 3/50; G is used to 0/01; H is used to 0/11; I is used to 0/51; J is used to 3/01; K is used to 0/03; L is used to 0/53; M is used to 3/03.