Tolerance of Escherichia coli to Cadmium1
- A. A. Zwarun2
The effect of Cd on Escherichia coli was studied by measuring the quantity of 14CO2 produced from 14C-glucose by the organism in the presence of increasing amounts of Cd. The test medium was a simulated fresh-water source consisting of 0.01% soy peptone in sterile, deionized water (pH 6). Decimal dilutions of Cd, as CdCl2, had no effect on the ability of the organism to produce 14CO2 in concentrations ranging from 0.006 µg Cd/liter to 0.6 mg Cd/liter. At 6 mg Cd/liter a decrease in 14CO2 production was noticed, and a higher concentration of Cd reduced 14CO2 evolution even further. The decrease in 14CO2 evolution by E. coli could be correlated with a decrease in the number of cells surviving the Cd treatments.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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