Inoculum was developed by adding 10 mL of hot spring sample into
90 mL nutrient broth in 300 mL Erlenmeyer flask and placed in
shaker incubator at 50 C and 150 rpm for 24 h 10 mL of inoculum
was transferred to 90 mL fresh minimal salts medium (MSM)
containing 100 mg of PCL film piece as sole source of carbon and
placed in shaker incubator at 50 C and 150 rpm for 72 h. After 72 h,
PCL film piece was recovered from this culture aseptically and
transferred to fresh MSM along with 10 mL of the previous culture
as an inoculum and placed again in shaker incubator for the next
72 h at 50 C and 150 rpm. This periodic shifting was repeated five
times. Colony forming unit (CFU) was calculated after every 72 h.
The bacterial strains showing best growth in the presence of PCL
film pieces were inoculated on PCL-emulsified MSM agar plates.