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The bioconcentration of the insecticide chlorpyrifos (CPF) [O,O-diethyl-O-(3,5,6-trichloro-2-pyridil) phosphorothioate] by the freshwater isopod Asellus aquaticus(L.) was investigated under time-varying exposure conditions in artificial outdoor ditches. The insecticide was applied as a single dose of Dursban 4E TM at nominal initial concentrations of the active ingredient of 0 7 and...
This study examines the steady state and non-steady state kinetics of five metals, cadmium, copper, lead, nickel, and zinc in earthworms. The steady state kinetics are based on field studies in which worms from contaminated and uncontaminated sites were collected and measurements were made of concentrations in the earthworms and soils. For each of the metals, evidence suggests that bioconcentration...
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