Life-cycle biomagnification study in fish

Article Abstract:

The bioaccumulation of polychlorinated biphenyls (PCBs) in fish is studied by a life-cycle biomagnification model. Growth, sex, reproduction, life stages, long-term kinetic rate constants and biotransformation were integrated into the life-cycle model. Experiments involved the monitoring of juvenile and adult guppies fed with PCB-contaminated foods. The life model's emphasis of important processes and its indication of varying parameters in the life stage of the fish demonstrated the efficacy of the model.

Methods, Analysis, Usage, Polychlorinated biphenyls, Fishes, Biological models, Animal life cycles, Guppies

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Modelling octanol/water partition coefficients by molecular topology: chlorinated benenes and biphenyls

Article Abstract:

Research has employed models based on chemical structure to establish octanol/water partition coefficients for chlorinated benzenes and byphenyls. Measurement was by the slow stirring method rather than the shake flask method. Advantages of the molecular topological model include speed of calculation, its theoretical base and wide application. Greater accuracy of the topological model was established through comparison of the polychlorinated biphenyls model with 12 models based on different approaches.

Chemistry, Physical and theoretical, Physical chemistry, Chemical models

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Size-dependent bioconcentration kinetics of hydrophobic organic chemicals in fish based on diffusive mass transfer and allometric relationships

Article Abstract:

A simple bioaccumulation model based on diffusive mass transfer was used to study the bioconcentration kinetics of five polychlorinated benzenes and biphenyls in fathead minnow. The results showed that bioconcentration kinetics are related to fish weight and physical-chemical parameters. These results suggest that physiological factors are also important parameters.

Physiological aspects, Environmental aspects, Bioaccumulation, Xenobiotics, Minnows

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