Bioavailability in Environmental Risk Assessment

CRC Press Inc
  • 1. Auflage
  • |
  • erschienen am 10. November 1995
  • Buch
  • |
  • Hardcover
  • |
  • 320 Seiten
978-1-56670-186-0 (ISBN)
Since bioavailability can alter health risk estimates by a factor of 10, 100 or more, its importance in risk assessment cannot be underestimated. Presenting the basic principles that govern bioavailability and how it is measured, this very unique and timely book fills a void in the existing literature on toxicology and toxicokinetics. It contains clear and concise discussions on the behavior of environmental contaminants and how they reach the bloodstream in living organisms. It also presents an exhaustive review of measured bioavailability factors for environmental contaminants most frequently encountered at contaminated sites.
  • Englisch
  • Bosa Roca
  • |
  • USA
Taylor & Francis Inc
  • Für Beruf und Forschung
  • |
  • Experts in Risk Assessment & Risk Management, Environmental Health Professionals, Hazardous Waste Experts, Environmental Engineers
  • 47 s/w Tabellen
  • |
  • 47 tabs.
  • Höhe: 235 mm
  • |
  • Breite: 156 mm
  • 635 gr
978-1-56670-186-0 (9781566701860)
1566701864 (1566701864)
Fundamental Concept of Bioavailability
Definition of Bioavailability
Unaltered Form
Systemic Circulation
Relationship Between Extent and Rate of Bioavailability
Extent of Bioavailability
Bioavailability in Health Risk Assessment
Biologically Effective Dose
Internal Dose and Average Daily Internal Dose
External Dose and Average Daily External Dose
Mechanism of Absorption
Respiratory System
Structure and Function
Rate-Limiting Processes for Gaseous Phase Contaminants
Other Factors Influencing Respiratory Bioavailability for Gases and Vapors
Rate-Limiting Processes for Particulate Phase Contaminants
Other Factors Influencing Respiratory Bioavailability for Aerosols
Gastrointestinal System
Structure and Function
Rate-Limiting Processes
Other Factors Influencing Oral Bioavailability
Structure and Function
Rate-Limiting Processes
Other Factors Influencing Dermal Bioavailability
Experimental Methods for Evaluating Bioavailability
General in Vivo Methods
Measurement of Blood Levels
Measurement of the Cumulative Urinary Excretion
Mass-Balance Technique
Measurement of Toxic Response
Specific Methods for the Inhalation Exposure Route
Determination of Deposition Fraction
Mechanical Clearance Fraction
Dissolution Rate
In Vitro Methods: Isolated Perfused Lung
Specific Methods for the Ingestion Exposure Route
Measurement of Fecal Excretion
Measurement of Liver Ratio
Dissolution Testing
Methods Based on the pH Partition Theory
Specific Methods for Dermal Exposure Route
Surface Disappearance
In Vitro Methods: Biological Membrane Models; Artificial Membrane Models
Exposure Routes and Bioavailability Factors for Selected Contaminants*
Chromium and Chromium Compounds
2,3,7,8-Tetrachlorodibenzo-p-Dioxin (TCDD)
Polynuclear Aromatic Hydrocarbons (PAHs)
Polychlorinated Phenols
Bioavailability of Xenobiotics from Contaminated Sites
Identification of Exposure Routes
Reliability and Validity of the Bioavailability Factors
Choice of Experimental Methods
Analytical Capabilities
Species Differences
Mixtures and Vehicles
Mechanism of Toxicity
Chemical Forms
Exposure Duration and Frequency
Priority Needs for Further Research
Considerations for Applying Bioavailability to Health Risk Assessment
Organic Xenobiotics
Other Application Considerations
Risk Management Considerations
Glossary of Terms

*For each of the contaminants in this section, the following is provided:

Exposure Routes and Receptors
Toxicokinetics (Following Absorption)
Bioavailability (Inhalation, Ingestion, Dermal)

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