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WORKER HAZARD POSED BY REENTRY INTO PESTICIDE-TREATED FOLIAGE: REASSESSMENT OF REENTRY LEVELS/INTERVALS USING FOLIAR RESIDUE TRANSFER - PERCUTANEOUS ABSORPTION PBPK/PD MODELS, WITH EMPHASIS ON ISOFENPHOS AND PARATHION
Citation:
Knaak, J. B., C C. Dary, G. T. Patterson, AND J N. Blancato. WORKER HAZARD POSED BY REENTRY INTO PESTICIDE-TREATED FOLIAGE: REASSESSMENT OF REENTRY LEVELS/INTERVALS USING FOLIAR RESIDUE TRANSFER - PERCUTANEOUS ABSORPTION PBPK/PD MODELS, WITH EMPHASIS ON ISOFENPHOS AND PARATHION. Chapter 13, Human and Ecological Risk Assessment: Theory and Practice. John Wiley & Sons Incorporated, New York, NY, , 673-731, (2002).
Impact/Purpose:
Research will be conducted to develop and apply integrated microenvironmental, and physiologically-based pharmacokinetic (PBPK) exposure-dose models and methods (that account for all media, routes, pathways and endpoints). Specific efforts will focus on the following areas:
1) Develop the Exposure Related Dose Estimating Model (ERDEM) System.
Includes: Updating the subsystems and compartments of the ERDEM models with those features needed for modeling chemicals of interest to risk assessors;
Designing and implementing the graphical user interface for added features.
Refining the exposure interface to handle various sources of exposure information;
Providing tools for post processing as well as for uncertainty and variability analyses;
Research on numerical and symbolic mathematical/statistical solution methods and computational algorithms/software for deterministic and stochastic systems analysis.
2) Apply ERDEM and other quantitative models to understand pharmacokinetics (PK) and significantly reduce the uncertainty in the dosimetry of specific compounds of regulatory interest.
Examples of the applications are:
exposure of children to pesticides
study design
route-to-route extrapolation
species extrapolation
experimental data analysis
relationship between parametric uncertainty and the distribution of model results
validity of scaling methods within species
validity of scaling methods from one species to another species
reduction of uncertainty factors for risk assessment
Description:
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