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Environmental quality criteria for metals toxic to soil and water organisms, using the free ion activity model or the biotic ligand model, are based on the concept that the major form of the metal available to the organism is the free metal ion, yet various metal complexes are bioavailable to a variety of soil and water organisms. We test here whether neutral copper or cadmium sulfates, negatively-charged...
The distribution of cadmium (Cd) and copper (Cu) ions onto and within two soil pseudomonads, Pseudomonas putida strains KT2440 and Corvallis, was investigated using selective extraction procedures and modeled using Langmuir isotherms. Cadmium and Cu associated differently with the surface, periplasm and cytoplasm of the two strains. Both of these pseudomonad cells allowed more Cu to pass into the...
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