Toxicokinetics and Risk Assessment

Download Toxicokinetics and Risk Assessment PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1000612139
Total Pages : 388 pages
Book Rating : 4.0/5 (6 download)

DOWNLOAD NOW!


Book Synopsis Toxicokinetics and Risk Assessment by : John C. Lipscomb

Download or read book Toxicokinetics and Risk Assessment written by John C. Lipscomb and published by CRC Press. This book was released on 2016-04-19 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicokinetics in Risk Assessment discusses the noncancer risk assessment process and its reliance on uncertainty factors in order to facilitate the continued study and refinement of the scientific basis for health risk assessment. This text clearly demonstrates the application of physiologically-based pharmacokinetic (PBPK) modeling in human healt

Toxicokinetics and Risk Assessment

Download Toxicokinetics and Risk Assessment PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 9780367453459
Total Pages : 361 pages
Book Rating : 4.4/5 (534 download)

DOWNLOAD NOW!


Book Synopsis Toxicokinetics and Risk Assessment by : John C Lipscomb

Download or read book Toxicokinetics and Risk Assessment written by John C Lipscomb and published by CRC Press. This book was released on 2019-12 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicokinetics in Risk Assessment discusses the noncancer risk assessment process and its reliance on uncertainty factors in order to facilitate the continued study and refinement of the scientific basis for health risk assessment. This text clearly demonstrates the application of physiologically-based pharmacokinetic (PBPK) modeling in human health risk assessment, as well as methods for data generation, extrapolation, and inclusion of laboratory results for chemical metabolism and computer-based predictions of biochemical constants to address estimates of variability between experimental animals and humans. This guide also includes recent examples of the use of toxicokinetic information to successfully replace default values for uncertainty factors with data-derived factors in risk assessments developed by the US Environmental Protection Agency.

Toxicology and Risk Assessment

Download Toxicology and Risk Assessment PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1119135923
Total Pages : 840 pages
Book Rating : 4.1/5 (191 download)

DOWNLOAD NOW!


Book Synopsis Toxicology and Risk Assessment by : Helmut Greim

Download or read book Toxicology and Risk Assessment written by Helmut Greim and published by John Wiley & Sons. This book was released on 2018-08-10 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a complete understanding of how our bodies respond to toxicants, and the principles used to assess the health risks of specific exposure scenarios Toxicology and Risk Assessment: A Comprehensive Introduction, Second Edition reflects recent advances in science and technology, and provides the scientific background and methodological issues to enable the reader to understand the basic principles in toxicology and to evaluate the health risks of specific exposure scenarios. Completely updated with the latest information, this book offers a concise introduction to the subject. It is divided into five sections: Principles in Toxicology, Organ Toxicology, Methods in Toxicology, Regulatory Toxicology, and Specific Toxicity. The 2nd Edition adds new chapters that cover recent scientific and technological advances and current topics including the endocrine system, alternatives to animal testing, risk assessment and thresholds for carcinogens, European and international regulation, nanomaterials, fuels, fragrances, and agrochemicals. Concentrates on the basic concepts of toxicology and provides sufficient information for the reader to become familiar with them in order to understand the principles and to evaluate the risks at given exposures 30% new chapters cover recent scientific and technological advances including alternatives to animal testing; genotoxic carcinogens; REACH regulations; nanomaterials; fuels; fragrances; PAHs; and agrochemicals Written by a team of international specialists, and edited by two outstanding scientists in the field Fully updated and expanded, Toxicology and Risk Assessment: A Comprehensive Introduction, Second Edition is an essential text for any student or researcher with an interest in toxicology and related risk assessments.

A Practical Guide to Toxicology and Human Health Risk Assessment

Download A Practical Guide to Toxicology and Human Health Risk Assessment PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1118881907
Total Pages : 400 pages
Book Rating : 4.1/5 (188 download)

DOWNLOAD NOW!


Book Synopsis A Practical Guide to Toxicology and Human Health Risk Assessment by : Laura Robinson

Download or read book A Practical Guide to Toxicology and Human Health Risk Assessment written by Laura Robinson and published by John Wiley & Sons. This book was released on 2018-11-05 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicology – the study of the adverse effects of chemicals on living organisms is the cornerstone to all aspects of chemical safety and knowledge of the subject is needed in a wide spectrum of fields from the chemical industry to medicine, emergency services, forensics, and regulatory science. Toxicology involves the study of symptoms, mechanisms, treatments and detection of poisoning ... especially the poisoning of people. The many problems arising from a poor understanding of toxicology and its applications in hazard communication and chemical safety motivated the author’s training courses and webinars, leading to this valuable book. Providing a practical and accessible guide, A Practical Guide to Toxicology and Human Health Risk Assessment enables readers to quickly build up knowledge and understanding of toxicology and its use in hazard identification, which is a fundamental part of chemical risk assessment. The book also covers current toxicological testing strategies and the use of physicochemical test data in hazard identification and exposure assessment. Examples are provided throughout the book to highlight important issues along with a summary of the key points that have been covered in each of the respective chapters. The book concludes with a listing of online resources on toxicology and risk assessment.

Toxicology and Risk Assessment

Download Toxicology and Risk Assessment PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470868945
Total Pages : 698 pages
Book Rating : 4.4/5 (78 download)

DOWNLOAD NOW!


Book Synopsis Toxicology and Risk Assessment by : Helmut Greim

Download or read book Toxicology and Risk Assessment written by Helmut Greim and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new book, written by two outstanding scientists in the field, describes the basic principles of toxic mechanisms and organ toxicity, providing detailed information on specific mechanisms or chemicals for exemplification. The goal is to provide sufficient information that the reader becomes familiar with the basic concepts in toxicology to enable him or her to understand the basic principles in toxicology and to evaluate the risks at given exposures. With this basic understanding the reader also will be able to critically evaluate the available information on a chemical and to identify data gaps. In addition to the introductory chapters the book will offer the following systematic information, presented in six special sections: Principles in Toxicology Organ Toxicology Methods in Toxicology Risk Assessment Risk Management Toxicity of Chemicals Fulfilling a demand for such a book, this will be a welcomed introductory text for students and non-experts alike to focus on and understand the principles of hazard identification and risk assessment of toxicants. Relevant to all those studying toxicology, biochemistry, biology, medicine and chemistry, as well as toxicologists in hospitals, universities and in industry.

Toxicological Risks of Selected Flame-Retardant Chemicals

Download Toxicological Risks of Selected Flame-Retardant Chemicals PDF Online Free

Author :
Publisher : National Academies Press
ISBN 13 : 0309171938
Total Pages : 534 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Toxicological Risks of Selected Flame-Retardant Chemicals by : National Research Council

Download or read book Toxicological Risks of Selected Flame-Retardant Chemicals written by National Research Council and published by National Academies Press. This book was released on 2000-07-06 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ignition of upholstered furniture by small open flames from matches, cigarette lighters, and candles is one of the leading causes of residential-fire deaths in the United States. These fires accounted for about 16% of civilian fire deaths in 1996. On average, each year since 1990, about 90 deaths (primarily of children), 440 injuries, and property losses amounting to 50 million dollars have resulted from fires caused by the ignition of upholstered furniture by small open flames. Certain commercial seating products (such as aircraft and bus seats) are subject to flammability standards and sometimes incorporate FR-treated upholstery cover materials, but there is no federal-government requirement for residential upholstered furniture, and it is generally not treated with FR chemicals. It is estimated that less than 0.2% of all U.S. residential upholstery fabric is treated with flame-retardant (FR) chemicals. The Consumer Product Safety Act of 1972 created the U.S. Consumer Product Safety Commission (CPSC) as an independent federal regulatory agency whose mission is to protect the public from unreasonable risks of injury and death associated with consumer products. CPSC also administers the Flammable Fabrics Act, under which it regulates flammability hazards and the Federal Hazardous Substances Act (FHSA), which regulates hazardous substances including chemicals. In 1993, the National Association of State Fire Marshals petitioned CPSC to issue a performance-based flammability standard for upholstered furniture to reduce the risk of residential fires. The Commission granted that portion of the petition relating to small open flame ignition risks. In response to concerns regarding the safety of FR chemicals, Congress, in the fiscal year 1999 appropriations report for CPSC, requested that the National Research Council conduct an independent study of the health risks to consumers posed by exposure to FR chemicals that are likely to be used in residential upholstered furniture to meet a CPSC standard. The National Research Council assigned the project to the Committee on Toxicology (COT) of the Commission on Life Sciences' Board on Environmental Studies and Toxicology. COT convened the Subcommittee on Flame-Retardant Chemicals, which prepared this report. Subcommittee members were chosen for their recognized expertise in toxicology, pharmacology, epidemiology, chemistry, exposure assessment, risk assessment, and biostatistics. Toxicological Risks of Selected Flame-Retardant Chemicals is organized into 18 chapters and two appendices. Chapter 2 describes the risk assessment process used by the subcommittee in determining the risk associated with potential exposure to the various FR chemicals. Chapter 3 describes the method the subcommittee used to measure and estimate the intensity, frequency, extent, and duration of human exposure to FR chemicals. Chapters 4-19 provide the subcommittee's review and assessment of health risks posed by exposure to each of the 16 FR chemicals. Data gaps and research needs are provided at the end of these chapters.

Toxicology in Risk Assessment

Download Toxicology in Risk Assessment PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 9781560328377
Total Pages : 344 pages
Book Rating : 4.3/5 (283 download)

DOWNLOAD NOW!


Book Synopsis Toxicology in Risk Assessment by : Harry Salem

Download or read book Toxicology in Risk Assessment written by Harry Salem and published by CRC Press. This book was released on 2000-02-17 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicology is an integral part of the risk assessment process. In this book, investigators from the scientific and regulatory communities describe recent technical developments in risk assessment embracing toxicology and its allied sciences, risk qualification and characterisation, risk management, and risk communication. Case studies pertaining to current issues involving chemical and environmental risks, including military and industrial scenarios, are presented. Chapters describe value and ethical choices underlying toxicological decisions, economic and legal implications of regulations, understanding risk, and recommendations of the commission on risk assessment and risk management.

Science and Judgment in Risk Assessment

Download Science and Judgment in Risk Assessment PDF Online Free

Author :
Publisher : National Academies Press
ISBN 13 : 030904894X
Total Pages : 668 pages
Book Rating : 4.3/5 (9 download)

DOWNLOAD NOW!


Book Synopsis Science and Judgment in Risk Assessment by : National Research Council

Download or read book Science and Judgment in Risk Assessment written by National Research Council and published by National Academies Press. This book was released on 1994-01-01 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: The public depends on competent risk assessment from the federal government and the scientific community to grapple with the threat of pollution. When risk reports turn out to be overblownâ€"or when risks are overlookedâ€"public skepticism abounds. This comprehensive and readable book explores how the U.S. Environmental Protection Agency (EPA) can improve its risk assessment practices, with a focus on implementation of the 1990 Clean Air Act Amendments. With a wealth of detailed information, pertinent examples, and revealing analysis, the volume explores the "default option" and other basic concepts. It offers two views of EPA operations: The first examines how EPA currently assesses exposure to hazardous air pollutants, evaluates the toxicity of a substance, and characterizes the risk to the public. The second, more holistic, view explores how EPA can improve in several critical areas of risk assessment by focusing on cross-cutting themes and incorporating more scientific judgment. This comprehensive volume will be important to the EPA and other agencies, risk managers, environmental advocates, scientists, faculty, students, and concerned individuals.

Strategies to Protect the Health of Deployed U.S. Forces

Download Strategies to Protect the Health of Deployed U.S. Forces PDF Online Free

Author :
Publisher : National Academies Press
ISBN 13 : 0309172535
Total Pages : 194 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Strategies to Protect the Health of Deployed U.S. Forces by : National Research Council

Download or read book Strategies to Protect the Health of Deployed U.S. Forces written by National Research Council and published by National Academies Press. This book was released on 2000-03-17 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Risk management is especially important for military forces deployed in hostile and/or chemically contaminated environments, and on-line or rapid turn-around capabilities for assessing exposures can create viable options for preventing or minimizing incapaciting exposures or latent disease or disability in the years after the deployment. With military support for the development, testing, and validation of state-of-the-art personal and area sensors, telecommunications, and data management resources, the DOD can enhance its capabilities for meeting its novel and challenging tasks and create technologies that will find widespread civilian uses. Strategies to Protect the Health of Deployed U.S. Forces assesses currently available options and technologies for productive pre-deployment environmental surveillance, exposure surveillance during deployments, and retrospective exposure surveillance post-deployment. This report also considers some opportunities for technological and operational advancements in technology for more effective exposure surveillance and effects management options for force deployments in future years.

Toxicity Mechanisms, Exposure, Toxicokinetic and Risk Assessment Aspects of Metals, Toxic for Animals and Humans

Download Toxicity Mechanisms, Exposure, Toxicokinetic and Risk Assessment Aspects of Metals, Toxic for Animals and Humans PDF Online Free

Author :
Publisher : Frontiers Media SA
ISBN 13 : 2889746402
Total Pages : 263 pages
Book Rating : 4.8/5 (897 download)

DOWNLOAD NOW!


Book Synopsis Toxicity Mechanisms, Exposure, Toxicokinetic and Risk Assessment Aspects of Metals, Toxic for Animals and Humans by : Yanzhu Zhu

Download or read book Toxicity Mechanisms, Exposure, Toxicokinetic and Risk Assessment Aspects of Metals, Toxic for Animals and Humans written by Yanzhu Zhu and published by Frontiers Media SA. This book was released on 2022-03-10 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Review of the Environmental Protection Agency's Draft IRIS Assessment of Formaldehyde

Download Review of the Environmental Protection Agency's Draft IRIS Assessment of Formaldehyde PDF Online Free

Author :
Publisher : National Academies Press
ISBN 13 : 0309211964
Total Pages : 204 pages
Book Rating : 4.3/5 (92 download)

DOWNLOAD NOW!


Book Synopsis Review of the Environmental Protection Agency's Draft IRIS Assessment of Formaldehyde by : National Research Council

Download or read book Review of the Environmental Protection Agency's Draft IRIS Assessment of Formaldehyde written by National Research Council and published by National Academies Press. This book was released on 2011-05-31 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Formaldehyde is ubiquitous in indoor and outdoor air, and everyone is exposed to formaldehyde at some concentration daily. Formaldehyde is used to produce a wide array of products, particularly building materials; it is emitted from many sources, including power plants, cars, gas and wood stoves, and cigarettes; it is a natural product in come foods; and it is naturally present in the human body as a metabolic intermediate. Much research has been conducted on the health effects of exposure to formaldehyde, including effects on the upper airway, where formaldehyde is deposited when inhaled, and effects on tissues distant from the site of initial contact. The U.S. Environmental Protection Agency (EPA) released noncancer and cancer assessments of formaldehyde for its Intergated Risk Information System (IRIS) in 1990 and 1991, respectively. The agency began reassessing formaldehyde in 1998 and released a draft IRIS assessment in June 2010. Given the complexity of the issues and the knowledge that the assessment will be used as the basis of regulatory decisions, EPA asked the National Research Council (NRC) to conduct an independent scientific review of the draft IRIS assessment. In this report, the Committee to Review EPA's Draft IRIS Assessment of Formaldehyde first addresses some general issues associated with the draft IRIS assessment. The committee next focuses on questions concerning specific aspects of the draft assessment, including derivation of the reference concentrations and the cancer unit risk estimates for formaldehyde. The committee closes with recommendations for improving the IRIS assessment of formaldehyde and provides some general comments on the IRIS development process.

Toxicological Risk Assessment and Multi-System Health Impacts from Exposure

Download Toxicological Risk Assessment and Multi-System Health Impacts from Exposure PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0323853587
Total Pages : 684 pages
Book Rating : 4.3/5 (238 download)

DOWNLOAD NOW!


Book Synopsis Toxicological Risk Assessment and Multi-System Health Impacts from Exposure by : Aristidis M. Tsatsakis

Download or read book Toxicological Risk Assessment and Multi-System Health Impacts from Exposure written by Aristidis M. Tsatsakis and published by Elsevier. This book was released on 2021-08-01 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicological Risk Assessment and Multisystem Health Impacts From Exposure highlights the emerging problems of human and environmental health attributable to cumulative and multiple sources of long-term exposure to environmental toxicants. The book describes the cellular, biological, immunological, endocrinologic, genetic, and epigenetic effects of long-term exposure. It examines how the combined exposure to nanomaterials, metals, pharmaceuticals, multifrequency radiation, dietary mycotoxins, and pesticides accelerates ecotoxicity in humans, animals, plants, and the larger environment. The book goes on to also offer insights into mixture risk assessments, protocols for evaluating the risks, and how this information can serve the regulatory agencies in setting safer exposure limits. The book is a go-to resource for scientists and professionals in the field tackling the current and emerging trends in modern toxicology and risk assessment. • Bridges basic research with clinical, epidemiological, regulatory, and translational research, conveying both an introductory understanding and the latest developments in the field • Evaluates real-life human health risk assessment for long-term exposures to xenobiotic mixtures and the role they play in contributing to chronic disease • Discusses advances in predictive (in silico) toxicology tools and the benefits of using omics technologies in toxicology research

Science and Decisions

Download Science and Decisions PDF Online Free

Author :
Publisher : National Academies Press
ISBN 13 : 0309120462
Total Pages : 422 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Science and Decisions by : National Research Council

Download or read book Science and Decisions written by National Research Council and published by National Academies Press. This book was released on 2009-03-24 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Risk assessment has become a dominant public policy tool for making choices, based on limited resources, to protect public health and the environment. It has been instrumental to the mission of the U.S. Environmental Protection Agency (EPA) as well as other federal agencies in evaluating public health concerns, informing regulatory and technological decisions, prioritizing research needs and funding, and in developing approaches for cost-benefit analysis. However, risk assessment is at a crossroads. Despite advances in the field, risk assessment faces a number of significant challenges including lengthy delays in making complex decisions; lack of data leading to significant uncertainty in risk assessments; and many chemicals in the marketplace that have not been evaluated and emerging agents requiring assessment. Science and Decisions makes practical scientific and technical recommendations to address these challenges. This book is a complement to the widely used 1983 National Academies book, Risk Assessment in the Federal Government (also known as the Red Book). The earlier book established a framework for the concepts and conduct of risk assessment that has been adopted by numerous expert committees, regulatory agencies, and public health institutions. The new book embeds these concepts within a broader framework for risk-based decision-making. Together, these are essential references for those working in the regulatory and public health fields.

The Practical Applicability of Toxicokinetic Models in the Risk Assessment of Chemicals

Download The Practical Applicability of Toxicokinetic Models in the Risk Assessment of Chemicals PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 9401734372
Total Pages : 197 pages
Book Rating : 4.4/5 (17 download)

DOWNLOAD NOW!


Book Synopsis The Practical Applicability of Toxicokinetic Models in the Risk Assessment of Chemicals by : J. Krüse

Download or read book The Practical Applicability of Toxicokinetic Models in the Risk Assessment of Chemicals written by J. Krüse and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2000 OpdenKamp Registration & Notification organized a two-day symposium in The Hague, The Netherlands, on `The Practical Applicability of Toxicokinetic Models in the Risk Assessment of Chemicals'. Several speakers from Europe and the United States were invited to present the different aspects. A vast range of areas was discussed in relation to toxicological modeling and risk assessment, such as occupational toxicology and biomonitoring, exposure to organic solvents and crop protection products, dose-response relations in carcinogenicity, regulatory toxicology, estimation of dermal penetration, uptake and disposition of organic chemicals in fish, the possibilities of in vitro methods in hazard and risk assessment, and the extrapolation between animal and human species. Based on their presentations, the speakers prepared comprehensive papers for this symposium book, reflecting the state of the art of modeling and toxicological risk assessment at the beginning of the third millennium.

Public Health Risk Assessment for Human Exposure to Chemicals

Download Public Health Risk Assessment for Human Exposure to Chemicals PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 9401004811
Total Pages : 352 pages
Book Rating : 4.4/5 (1 download)

DOWNLOAD NOW!


Book Synopsis Public Health Risk Assessment for Human Exposure to Chemicals by : K. Asante-Duah

Download or read book Public Health Risk Assessment for Human Exposure to Chemicals written by K. Asante-Duah and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: In fact, with the control and containment of most infectious conditions and diseases of the past millennium having been achieved in most developed countries, and with the resultant increase in life expectancies, much more attention seems to have shifted to degenerative health problems. Many of the degenerative health conditions have been linked to thousands of chemicals regularly encountered in human living and occupational/work environments. It is important, therefore, that human health risk assessments are undertaken on a consistent basis - in order to determine the potential impacts of the target chemicals on public health.

Toxicity and Risk

Download Toxicity and Risk PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 020346804X
Total Pages : 165 pages
Book Rating : 4.2/5 (34 download)

DOWNLOAD NOW!


Book Synopsis Toxicity and Risk by : H Paul A Illing

Download or read book Toxicity and Risk written by H Paul A Illing and published by CRC Press. This book was released on 2001-09-20 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Humans are constantly, and increasingly, exposed to chemicals - some naturally occurring and some manufactured. Exposure to some of these chemicals, or to large amounts of them, can bring risks to human health and the environment. Toxicity and Risk sets out the political, social, legal and scientific basis of risk assessment and risk management. Ta

Scientific Frontiers in Developmental Toxicology and Risk Assessment

Download Scientific Frontiers in Developmental Toxicology and Risk Assessment PDF Online Free

Author :
Publisher : National Academies Press
ISBN 13 : 0309070864
Total Pages : 348 pages
Book Rating : 4.3/5 (9 download)

DOWNLOAD NOW!


Book Synopsis Scientific Frontiers in Developmental Toxicology and Risk Assessment by : National Research Council

Download or read book Scientific Frontiers in Developmental Toxicology and Risk Assessment written by National Research Council and published by National Academies Press. This book was released on 2000-12-21 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Frontiers in Developmental Toxicology and Risk Assessment reviews advances made during the last 10-15 years in fields such as developmental biology, molecular biology, and genetics. It describes a novel approach for how these advances might be used in combination with existing methodologies to further the understanding of mechanisms of developmental toxicity, to improve the assessment of chemicals for their ability to cause developmental toxicity, and to improve risk assessment for developmental defects. For example, based on the recent advances, even the smallest, simplest laboratory animals such as the fruit fly, roundworm, and zebrafish might be able to serve as developmental toxicological models for human biological systems. Use of such organisms might allow for rapid and inexpensive testing of large numbers of chemicals for their potential to cause developmental toxicity; presently, there are little or no developmental toxicity data available for the majority of natural and manufactured chemicals in use. This new approach to developmental toxicology and risk assessment will require simultaneous research on several fronts by experts from multiple scientific disciplines, including developmental toxicologists, developmental biologists, geneticists, epidemiologists, and biostatisticians.