. Significant and similar changes were
found for both microbial strains. The peak at 2,660 cm-1
corresponds to CHO stretching vibration that has been
disappeared in case of BSM-1 and 2 while new band has
been observed at 939 cm-1
(O–H bend) which supports
the depolymerization activity of the microbial isolates.
The strong absorption peaks at 719 and 1,472 cm-1
became weaker after microbial treatment. In addition, the
intensity of those peaks reduced more in case of BSM-2
than BSM-1 whereas peaks at 2,919 and 2,850 cm-1
became sharper in the treated sample than the control
one, here also the same microbial activity pattern was
seen. The change in the peak values of almost all func-
tional groups supporting the conformational change on
polymer surface.