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.
Contained in this volume are the proceedings of the international conference on the "Genetic Toxicology of Complex Mixtures," held from July 4-7, 1989, in Washington, DC. This meeting was a satellite of the "Fifth International Conference on Environmental Mutagens" and the seventh in a biennial series of conferences on "Short-term Bioassays in the Analysis of Complex Environmental Mixtures. " Our central objective in calling together key researchers from around the world was to extend our knowledge of the application of the methods of genetic toxicology and analytical chemistry in the evaluation of chemical mixtures as they exist in the environment. This conference emphasized the study of genotoxicants in air and water, and the assessment of human exposure and cancer risk. The latest strategies and methodologies for biomonitoring of genotoxicants (including transformation products) were described in the context of the ambient environment. Source character ization and source apportionment were discussed as an aid to understand ing the origin and relative contribution of various kinds of complex mix tures to the ambient environment. Similarly, investigations of genotoxi cants found in the indoor environment (sidestream cigarette smoke) and in drinking water (chlorohydroxyfuranones) were given special attention in terms of their potential health impacts. New molecular techniques were described to enable more precise quantitation of internal dose and dose to-target tissues. The emphasis of presentations on exposures/effects assessment was on integrated quantitative evaluation of human exposure and potential health effects.
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
Organochromium Compounds is a three-chapter text that covers the major developments in the preparation, characterization, and reaction of the five main classes of organochromium compounds. These classes include the chromium p and solvated sodium and lithium poly(organo)chromate(III) and (II) complexes, carbenoid-chromium, solvated s-bonded organochromium(III) and (II), solvated sodium and lithium poly(organo)chromate(III) and (II) complexes, and unsolvated s-bonded tetra(organo)chromium(IV) compounds. This book will be of value to organic chemists and researchers who are interested in organotransition metal chemistry.
