Download or read book Toxicology of Chemical Mixtures A Review of Mixtures Assessment written by and published by . This book was released on 2004 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The science of risk assessment revolves broadly around hazard identification (toxicity) and exposure assessment information. While exposure to environmental hazards most often occurs with complex chemical mixtures, the majority of existing toxicity data is for single compounds or simple mixtures, thus presenting problems to the risk assessor. Several approaches to assess mixtures have been developed (e.g. Hazard Index; Target-organ Toxicity Dose; Weight-of Evidence; Toxic Equivalence), each of which have their limitations, primarily with respect to the prediction of potentially unforeseen interactions between the mixture constituents which may affect their resultant toxic outcome. Recent advances in disciplines such as genomics, proteomics, metabonomics and physiologically-based pharmacokinetic modeling should assist in the hazard assessment of complex chemical mixtures. However, the process of regulatory assessment of these types of exposures will remain both complex and difficult.
Download or read book Mixture Toxicity written by Cornelis A. M. van Gestel and published by CRC Press. This book was released on 2016-04-19 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade and a half, great progress has been made in the development of concepts and models for mixture toxicity, both in human and environmental toxicology. However, due to their different protection goals, developments have often progressed in parallel but with little integration. Arguably the first book to clearly link ecotoxicology an
Download or read book Toxicology of Chemical Mixtures written by Raymond S.H. Yang and published by Elsevier. This book was released on 2013-10-22 with total page 745 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although toxicologic studies in the laboratory often focus on a single chemical, in the larger world, mixtures of chemicals are routinely encountered. Toxicology of Chemical Mixtures examines the mechanisms of interactions and health effects stemming from chemical mixtures in the environment. Toxicologists, pharmacologists, environmental scientists, and professionals involved in environmental clean-ups will benefit from its content. Emphasis is on low-level, long-term exposure. Some of the issues addressed include Target organ toxicities in response to chemical mixture exposures Risk assessment and experimental approaches Case studies and special pollution problems Special pollution problems
Download or read book The Toxicology of Chemical Mixtures Risk Assessment for Human and Ecological Receptors written by and published by . This book was released on 2005 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixtures of chemicals represent a concern in all areas of toxicology and a challenge to risk assessors as most sites with environmental contamination, including Department of Defense sites, involve simultaneous or sequential exposures of multiple chemicals to human or ecological receptors. A major concern with mixtures is that they may lead to outcomes (health effects) or increased toxicity (synergism) not expected from the risk characterization of individual chemicals at the site. The focus of this literature review is 0 examine the principles used to determine toxicity in chemical mixtures risk assessment for human and ecological receptors at hazardous waste sites. This review provides an overview of current practices useful to a remedial project manager or risk assessor prior to their first chemical mixtures risk assessment.
Download or read book Human Toxicology of Chemical Mixtures written by Harold Zeliger and published by William Andrew. This book was released on 2011-06-24 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this important reference work, Zeliger catalogs the known effects of chemical mixtures on the human body and also proposes a framework for understanding and predicting their actions in terms of lipophile (fat soluble) / hydrophile (water soluble) interactions. The author’s focus is on illnesses that ensue following exposures to mixtures of chemicals that cannot be attributed to any one component of the mixture. In the first part the mechanisms of chemical absorption at a molecular and macromolecular level are explained, as well as the body’s methods of defending itself against xenobiotic intrusion. Part II examines the sources of the chemicals discusssed, looking at air and water pollution, food additives, pharmaceuticals, etc. Part III, which includes numerous case studies, examines specific effects of particular mixtures on particular body systems and organs and presents a theoretical framework for predicting what the effects of uncharacterized mixtures might be. Part IV covers regulatory requirements and the need to adjust recommended exposure levels for products containing mixtures. It also contains recommendations on how to limit exposure to mixtures in the products we use and on how to limit release of mixtures into the environment. Providing brief summaries of each mixture and its effects, Zeliger provides a comprehensive reference, a jumping off point for professionals (with extensive chapter bibliographies) and an introduction to the topic for those studying traditional toxicology. Addressing many inadequately understood illnesses and conditions such as asthma, infertility and cancer, it will also be of interest to health professionals, environmental scientists and lawyers. Presents a theoretical framework for predicting the effects of chemical mixtures for which no specific data exists (this predictive aspect is important due to the vast number of different potential chemical combinations – far too many to comprehensively catalog) A quick and convenient source of hard to come by data on the rapidly developing field of chemical mixtures, for groups including chemists and engineers, toxicologists, health professionals and environmental scientists New and updated material comprises over 30% of this timely new edition, which includes the latest research data alongside an expanded introduction to the science and art of predicting the toxicological properties of chemical mixtures
Download or read book Mixture Toxicity written by Cornelis A. M. van Gestel and published by CRC Press. This book was released on 2010-11-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade and a half, great progress has been made in the development of concepts and models for mixture toxicity, both in human and environmental toxicology. However, due to their different protection goals, developments have often progressed in parallel but with little integration. Arguably the first book to clearly link ecotoxicology and classic human toxicology, Mixture Toxicity: Linking Approaches from Ecological and Human Toxicology incorporates extensive reviews of exposure to toxicants, toxicokinetics and toxicodynamics, toxicity of mixtures, and risk assessment. The book examines developments in both fields, compares and contrasts their current state of the art, and identifies where one field can learn from the other. Each chapter provides an essential overview of the state of the art in both human and ecotoxicological mixture risk assessment, focusing on the work published in the last fifteen years. The coverage progresses from exposure to risk assessment, at each step identifying the special complications typically raised by mixtures. Based on in-depth discussions among specialists representing different disciplines and approaches, the chapters each address: Exposure — how to quantify the amounts of chemicals that may enter the living organism Kinetics, dynamics, and metabolism — how the chemicals enter an organism, travel within the organism, how they are metabolized and reach the target site, and explain development of toxicity with time Toxicity — what are the chemicals’ detrimental effects on the organism Test design and complex mixture characterization — how chemicals interact, how to measure effects of mixtures, and how to identify responsible chemicals Risk assessment — how to assess for risks in humans and the environment An unusual combination of different points of view on exposure to and risk assessment of chemical mixtures, this book summarizes current knowledge on combined effects of toxicant mixtures, information that is generally only available in a very fragmented form as individual journal papers. It identifies possible crosslinks and includes recommendations for mutual developments that can improve the state of knowledge on mixture toxicity and ultimately lead to better and more integrated risk assessment.
Download or read book Complex Mixtures written by National Research Council and published by National Academies Press. This book was released on 1988-02-01 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the laboratory, testing the toxic effects for a single compound is a straightforward process. However, many common harmful substances occur naturally as mixtures and can interact to exhibit greater toxic effects as a mixture than the individual components exhibit separately. Complex Mixtures addresses the problem of identifying and classifying complex mixtures, investigating the effect of exposure, and the research problems inherent in testing their toxicity to human beings. A complete series of case studies is presented, including one that examines the cofactors of alcohol consumption and cigarette smoke.
Download or read book Toxicological Risk Assessment of Chemicals written by Elsa Nielsen and published by CRC Press. This book was released on 2008-02-21 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike many existing books on toxicology that cover either toxicity of a particular substance or toxicity of chemicals on particular organ systems, Toxicological Risk Assessment of Chemicals: A Practical Guide lays out the principle activities of conducting a toxicological risk assessment, including international approaches and methods for the risk
Download or read book Principles and Practice of Mixtures Toxicology written by Moiz Mumtaz and published by John Wiley & Sons. This book was released on 2011-05-23 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first comprehensive treatment of the subject for more than a decade includes the latest research on nanoparticle toxicology. The practical handbook addresses all areas where toxic mixtures are encountered, from environmental via occupational to medical settings, giving special consideration to air and water, and to the specific requirements for study design in mixture toxicology. While no extensive prior knowledge or toxicological experience is required, the practice-oriented case studies and examples in the second part make this the ideal companion for the professional toxicologist in industry or healthcare institutions with little time for academic study.
Download or read book Applications of Toxicogenomic Technologies to Predictive Toxicology and Risk Assessment written by National Research Council and published by National Academies Press. This book was released on 2007-12-19 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new field of toxicogenomics presents a potentially powerful set of tools to better understand the health effects of exposures to toxicants in the environment. At the request of the National Institute of Environmental Health Sciences, the National Research Council assembled a committee to identify the benefits of toxicogenomics, the challenges to achieving them, and potential approaches to overcoming such challenges. The report concludes that realizing the potential of toxicogenomics to improve public health decisions will require a concerted effort to generate data, make use of existing data, and study data in new waysâ€"an effort requiring funding, interagency coordination, and data management strategies.
Download or read book Risk Assessment of Chemical Mixtures written by R. S. H. Yang and published by Wiley. This book was released on 2015-09-28 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an up-to-date and cutting-edge review of the area of mixtures toxicology and risk assessment methodologies. The field of mixtures toxicology, especially as regards risk assessment, has rapidly changed in the last few years. The book covers all areas where recent progress has been made (e.g., statistical models), as well as identifies areas where more progress is needed (e.g., kinetics, computer modeling, “-omics” technologies). In addition, the chapters with “Real World Examples” provides the reader with great examples of how mixtures risk assessment is currently being conducted.
Download or read book Methods for Assessing the Effects of Mixtures of Chemicals written by Velimir B. Vouk and published by John Wiley & Sons. This book was released on 1987 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been recognized that real exposures of people and non-human biota are generally two mixtures of chemicals, rather than two pure entities. In spite of this, evaluations in the field or laboratory have frequently only looked at single chemicals. Therefore, this book sets out to identify the limitations, practicalities and utility of dealing with chemicals in mixtures. It is the first systematic attempt to examine methods for evaluating mixtures of chemicals. This is a particularly difficult task and complete success cannot be claimed. However, suggestions for further study and research are made which may help to improve the approach to the subject.
Download or read book Human Toxicology of Chemical Mixtures written by Harold Zeliger and published by William Andrew. This book was released on 2008-07-25 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book considers how exposure to toxic mixtures affects the different physiological systems and organs, including the respiratory, cardiovascular, immunological, musculoskeletal, nervous and reproductive systems, as well as the various organs, including the kidneys, liver and skin.The author evaluates various sources of exposure, including air, water, and soil pollution; in utero exposure; chemicals contained in foods, cosmetics, and domestic cleaning products; adhesives and paints; industrial chemicals; pesticides; electromagnetic radiation; and chemicals ingested or inhaled during the use of alcohol, tobacco and narcotics.The book also examines the interplay between exposure to these mixtures and the prevalence of various diseases and conditions, including autism, attention deficit hyperactivity disorder (ADHD), developmental neurotoxicology, multiple chemical sensitivity (MSC), chronic fatigue syndrome (CFS), fibromyalgia (FM), Gulf war syndrome, cancer and cancer clusters. The author also discusses how exposure to these mixtures yields the above diseases and conditions in different populations: fetuses, infants, pre-adolescent children, adolescents and adults.Finally, the book addresses the profound policy implications for formulation, labeling and use of chemical products, and it proposes more stringent exposure limits and warning requirements in light of the newly recognized toxic effects that are directly attributable to the mixture of toxic lipophilic and hydrophilic chemicals. Addresses chemical mixtures, while most literature only deals with single chemicals exposure Explains why certain toxicological effects are observed Discusses diagnosis and treatment of injuries resulting from exposure Explores consequences of effects on product formulation, use, handling and required warnings Provides guidelines for safer development of personal care, cosmetic, industrial and consumer use products
Download or read book The Risk Assessment Guidelines of 1986 written by and published by . This book was released on 1987 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Aquatic Toxicology and Hazard Evaluation written by F. L. Mayer and published by ASTM International. This book was released on 1977 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicological Risk Assessment for Beginners written by José A. Torres and published by Springer. This book was released on 2015-03-27 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a comprehensive introductory guide to the practical aspects of risk assessment. Chapters include clearly defined objectives and summaries. The book includes: hazard identification, dose-response, exposure assessment, risk characterization, chemical mixtures, epidemiology, emerging issues and global perspectives with accessible language. The book concludes with a set of hypothetical case studies. Toxicological Risk Assessment for Beginners aims not to create an expert, but rather to provide readers with their first understanding of the risk assessment topic. This book was designed with the student in mind. We simplify a complex process for beginners and balance theory with practical aspects, but remain fluid enough to increase difficulty with case studies. By incorporating an action based, step by step approach to learning the risk assessment process, this book provides its readers with an elementary understanding of how the risk assessment process is initiated, developed and finished, making it a valuable guide for graduate students, post-doctoral fellows and early career scientists in industry.
