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- W2556058249 abstract "We used a two-compartment, clearance volume-based model to examine rubidium and cesium . pharmacokinetics in channel catfish Ictalurus punctatus after intravascular administration. We com- pared the apparent volumes of distribution in the central and peripheral compartments and the intercompartmental and whole-body clearances of both metals at 20.0 8C and 27.5 8C. Biological half-times of Rb were 15 to 16 d at both temperatures, but Cs biological half-times averaged 101 d and 85 . d at 20.0 8C and 27.5 8C, respectively 5 to 7 times longer than those of Rb in the same individual . Both the intercompartmental and total body clearances of Rb were also 6 to 7 times greater than those of Cs. The apparent volumes of distribution for Rb in the central compartments were twice those of Cs and remained constant with temperature. The apparent volumes of distribution of both elements in periph- eral compartments were large compared with their corresponding central compartments, and decreased by a similar extent with increased temperature. Cesium tissue to blood ratios were greatest for white muscle, with more than 85% of the Cs present in this tissue. Partitioning of Cs in peripheral tissues apparently decreased with increased temperature conditions. Our results indicate that application of pharmacokinetic modeling techniques can enhance studies of radionuclide kinetics by helping to identify rate-limiting processes within individuals that may control uptake and elimination." @default.
- W2556058249 created "2016-11-30" @default.
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- W2556058249 date "1999-01-01" @default.
- W2556058249 modified "2023-09-27" @default.
- W2556058249 title "Channel Catfish Ictalurus punctatus" @default.
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