3.5.3 Preparation of cadmium resistant bacteria
Overnight inoculum of cadmium resistant bacterial strains, including Micrococcus sp. MU1, Pseudomonas sp. PM2 and Arthrobacter sp. TM6 were cultured in LB broth to give an initial cell concentration at OD600~0.2 and incubated at 28°C, 150 rpm for 4 h. Cells culture was harvested by centrifugation at 6,000 rpm at 4C for 10 min and discarded supernatant. Cell density was measured using spectrophotometer at OD600. Then, cell pellets were suspended in a sterile 50 mM phosphate buffer (pH 7.0). Cell suspension was enumerated by spreading on LB agar plate. All plates were incubated at 30C for 24-48 h until bacteria colony appearance. After that, a number of bacterial colonies were counted and calculated in colony-forming unit (CFU)/mL. The viable cells of Micrococcus sp. MU1, Pseudomonas sp. PM2 and Arthrobacter sp TM6 were 7.3x106, 8.6x106 and 8.5x106 CFU/mL, respectively.
3.5.3 Preparation of cadmium resistant bacteriaOvernight inoculum of cadmium resistant bacterial strains, including Micrococcus sp. MU1, Pseudomonas sp. PM2 and Arthrobacter sp. TM6 were cultured in LB broth to give an initial cell concentration at OD600~0.2 and incubated at 28°C, 150 rpm for 4 h. Cells culture was harvested by centrifugation at 6,000 rpm at 4C for 10 min and discarded supernatant. Cell density was measured using spectrophotometer at OD600. Then, cell pellets were suspended in a sterile 50 mM phosphate buffer (pH 7.0). Cell suspension was enumerated by spreading on LB agar plate. All plates were incubated at 30C for 24-48 h until bacteria colony appearance. After that, a number of bacterial colonies were counted and calculated in colony-forming unit (CFU)/mL. The viable cells of Micrococcus sp. MU1, Pseudomonas sp. PM2 and Arthrobacter sp TM6 were 7.3x106, 8.6x106 and 8.5x106 CFU/mL, respectively.
การแปล กรุณารอสักครู่..
