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  • 1 Bulgarian Academy of Sciences Institute of Nuclear Research and Nuclear Energy Sofia (Bulgaria)
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The change in the microelement content of aqueous media affects the development and the vital process of microorganisms. The present paper treats the accumulation and the influence of the toxic elements Cd and Cu on the metabolic processes proceeding in bacterial communities. To trace the dynamics of one of the basic metabolic processes, oxygen consumption was measured polarographically. For tracing the accumulation of the additionally included Cd and Cu in the experimental volume of water, the nondestructive method of neutron activation analysis was used. The results show a correspondence between the inclusion of elements and the change in the breathing as a function of the additionally included concentration of the investigated microelements. The more toxic effect of Cd on the oxygen consumption is noticeable.