Download or read book Mutagenesis in Sub Mammalian Systems written by G.E. Paget and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics in Toxicology Toxicology is a science that stands at the intersection of several interests and disciplines. These intersecting forces are by no means all scientific since some are legal and some are commercial. All have valid things to say about the conduct and interpretation of toxicity experiments. The practising toxicologist must bear all these sometimes conflicting forces in mind as he carries out his duties. This is especially true, of course, of the toxicologist in industry. Toxicology is also a field in which contract research particularly flourishes and a number of major contract research companies have established over the years a reputation for contributing usefully to the practice of this skill. These contract research organisations are particu larly favoured to develop an appreciation of the problems of the industrial toxicologist, since it is very common for such a company to service the toxicological needs of companies in several sectors of industry producing new chemical compounds, and the contract research company, therefore, is aware of a wider diversity of problems than probably affects a single toxicologist in one industry.

Download or read book Chemical Carcinogenesis and Mutagenesis II written by Colin S. Cooper and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: I have been privileged to witness and participate in the great growth of knowledge on chemical carcinogenesis and mutagenesis since 1939 when I entered graduate school in biochemistry at the University of Wisconsin Madison. I immediately started to work with the carcinogenic aminoazo dyes un der the direction of Professor CARL BAUMANN. In 1942 I joined a fellow graduate student, ELIZABETH CA VERT, in marriage and we soon commenced a joyous part nership in research on chemical carcinogenesis at the McArdle Laboratory for Cancer Research in the University of Wisconsin Medical School in Madison. This collaboration lasted 45 years. I am very grateful that this volume is dedi cated to the memory of Elizabeth. The important and varied topics that are reviewed here attest to the continued growth of the fields of chemical car cinogenesis and mutagenesis, including their recent and fruitful union with viral oncology. I feel very optimistic about the application of knowledge in these fields to the eventual solution of numerous problems, including the detection and estimation of the risks to humans of environmental chemical carcinogens and re lated factors.

Download or read book Chemical Mutagens written by Alexander Hollaender and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 9 of Chemical Mutagens consists mainly of chapters discussing the development and validation of short-term assays to detect the mutagenic effects of environmental chemicals. These chapters include an assay with the grasshopper neuroblast, a comparison of mutagenic responses of human lung-derived and skin-derived diploid fibroblasts, a forward-mutation assay in Salmonella, a multigene sporulation test in Bacillus subtilis, a specific locus assay in mouse lymphoma cells, a study of the induction of bacteriophage lambda, and the granuloma pouch assay. In addition, there are two chapters on the identification of mutagens in cooked food and in human feces. Frederick 1. de Serres Research Triangle Park, North Carolina vii Contents Chapter 1 The Grasshopper Neuroblast Short-Term Assay for Evaluating the Effects of Environmental Chemicals on Chromosomes and Cell Kinetics 1 Mary Esther Gaulden, Jan C. Liang, and Martha J. Ferguson 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. Embryo Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. 1. Species. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. 2. Origin of Colonies . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. 3. Life Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 4. Colony Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 6 2. 5. Pathology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2. 6. Allergy to Grasshoppers . . . . . . . . . . . . . . . . . . . . . . 14 3. Grasshopper Egg, Embryo, and Cells . . . . . . . . . . . . . . . . . 14 3. 1. The Egg Shell and Membranes . . . . . . . . . . . . . . . . . 14 3. 2. Embryonic Development . . . . . . . . . . . . . . . . . . . . . . 17 3. 3. Cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4. Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4. 1. Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4. 2. Preparation of Embryos for Cell Analysis . . . . . . . . . 34 4. 3. Analysis of Mutagen Effects. . . . . . . . . . . . . . . . . 40 . . . 5. Response of the Grasshopper Neuroblast to Mutagens . . . . 50 5. 1. Reproducibility of Data . . . . . . . . . . . . . . . . . . . . . . . 50 5. 2. Radiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 5. 3. Chemical Mutagens . . . . . . . . . . . . . . . . . . . . . . . . . .

Download or read book The Evaluation of Toxicological Data for the Protection of Public Health written by W. J. Hunter and published by Elsevier. This book was released on 2016-07-29 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Evaluation of Toxicological Data for the Protection of Public Health: Proceedings of the International Colloquium, Luxembourg, December 1976 focuses on the review of toxicological tests and methods used in toxicological evaluation of chemicals and reconsideration of these procedures in identifying decision-making processes involved in the protection of public health. The selection first discusses reviews of toxicological tests, including introductory remarks and comments on acute toxicity; problems associated with the testing of environmental mutagens; and the testing of carcinogenic potentials. The publication also examines the uncertainties related to the evaluation of the health hazards of environmental chemicals from toxicological data and epidemiological monitoring of indices of chemical hazards. The book takes a look at safety factors and their application in toxicological evaluation; ecotoxicological approaches for the protection of environment and health; and use of biological materials as environmental pollution gauges. The text also discusses acute toxicity, teratogenic effects of pollutants, and examples of ecotoxicological research. The selection is a dependable source of data for readers interested in the evaluation of toxicological data relative to the protection of public health.

Download or read book Current Catalog written by National Library of Medicine (U.S.) and published by . This book was released on 1979 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt: First multi-year cumulation covers six years: 1965-70.

Download or read book Mutagenic Effects of Environmental Contaminants written by H.E. Sutton and published by Elsevier. This book was released on 2012-12-02 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mutagenic Effects of Environmental Contaminants investigates the mutagenic consequences of environmental contaminants, such as pesticides, industrials, food additives, drugs, and biologicals, as well as the possible relationships between mutagenesis and carcinogenesis. It describes the monitoring of chemical mutagens in the environment and the ways that genetic mutations cause disease in humans. Organized into 14 chapters, this volume begins with an overview of the current burden of human genetic disease and the biochemical mechanisms of mutation. It then discusses practical and feasible methods that use a variety of organisms to screen potential mutagenic agents, increased mutation rates in human populations, mutagens that are currently used commercially, and the interrelationships between mutagenicity, carcinogenicity, and teratogenicity. The reader is also introduced to genetic toxicology, detection of chemically induced mutations in experimental animals, and chromosome and somatic mutations in humans. This book is a valuable resource for scientists, policymakers, and administrators of environmental programs.

Download or read book Environmental Health Perspectives written by and published by . This book was released on 1993 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carcinogenesis Abstracts written by and published by . This book was released on 1976 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pesticides Abstracts written by and published by . This book was released on 1977 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Chemical Mutagenesis written by Frederick De Serres and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 1113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frederick J. de Serres, Ph. D. Office of the Associate Director for Genetics National Institute of Environmental Health Sciences Research Triangle Park, North Carolina (U. S. A. ) 27709 The Workshop on Comparative Chemical Mutagenesis was orga nized to begin the process of problem identification and resolution concerning our needs to evaluate the data on test chemicals arising from assays for mutagenic activity on laboratory organisms. In the past, data on chemical mutagens has been generated and published in the scientific literature on a more or less random basis. Individual chemicals enjoy a brief period of "popularity" that leads to a burst of publications in the same or sometimes related assay systems. The incompleteness of the data base, in many of these cases, makes comparative mutagenesis difficult or impossible. In our attempts to compare the genetic effects of a given chemical over a wide range of assay systems, we are often interested in making quantitative as well as qualitative compari sons. To restate the first comparison: is the chemical under ques tion a weak, moderate or potent mutagen over a wide range of assay systems--or alternatively, does the level of response vary markedly? To make the second comparison, what is needed is information on the spectrum of genetic alterations produced as well as whether this spectrum is consistent over a wide range of organisms.

Download or read book Mutations in Man written by G. Obe and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This year we remember the 39th anniversary of the atomic bomb explo sions in Hiroshima and Nagasaki, which led to the exposure of thou sands of people to high doses of ionizing radiations. Nearly 18 years earlier, on the 15th of September, 1927, H. J. Muller presented his paper The Problem of Genic Modification at the Fifth International Congress of Genetics in Berlin, in which he brilliantly demonstrated the muta genic activity of X-rays. In 1928, K. H. Bauer formulated his mutation theory of the origin of cancer, and already in 1914, Th. Boveri speculat ed that tumor cells originate from an abnormal chromosomal comple ment. In the meantime we have learned that also nonionizing radiation and an immense number of environmental chemicals, both, man-made and naturally occurring, are mutagenic in a variety of test systems, in cluding human cells. In no case has it been shown unequivocally that physical or chemical mutagens have led to an elevation of the mutation rate in the germ cells of man, but in view of the huge body of experi mental data this seems to be a problem of detection. It can be expect ed that germ cell mutations are induced as a consequence of exposure to mutagens in man, as yet undetectable with the methods at hand. An uncontrolled addition of mutations to the human gene pool may well have unforeseen and catastrophic consequences in future genera tions for whom we should feel responsible.

Download or read book Molecular Aspects of Oxidative Drug Metabolizing Enzymes written by Emel Arinc and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented here are recent advances in biochemical, toxicological, and regulatory aspects of oxidative drug metabolizing enzymes. Mainly cytochrome P450-dependent and flavin-containing monooxygenases (FMO) are covered. Moreover, the book deals with genotoxicity studies and toxicological interactions of environmental chemicals and mechanisms of mutagenicity and tumor formation. The construction of genetically engineered mammalian cells for the production of a specific P450 isozyme and the application of these cell lines in drug metabolism, mutagenicity and toxicity studies are described in detail. Further, insight is provided into how a number of aquatic species cope with pollutants and their genotoxicity.

Download or read book Five Year Report written by United States-Japan Cooperative Medical Science Program and published by . This book was released on 1975 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Draft Supplement to the Environmental Impact Statement Pacific Southwest Region Vegetation Management for Reforestation written by United States. Forest Service. Pacific Southwest Region and published by . This book was released on 1986 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Draft Environmental Impact Statement written by United States. Forest Service. Pacific Southwest Region and published by . This book was released on 1981 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vegetation Management for Reforestation California National Forests written by and published by . This book was released on 1986 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stress Induced Mutagenesis written by David Mittelman and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of stress-induced mutagenesis has changed ideas about mutation and evolution, and revealed mutagenic programs that differ from standard spontaneous mutagenesis in rapidly proliferating cells. The stress-induced mutations occur during growth-limiting stress, and can include adaptive mutations that allow growth in the otherwise growth-limiting environment. The stress responses increase mutagenesis specifically when cells are maladapted to their environments, i.e. are stressed, potentially accelerating evolution then. The mutation mechanism also includes temporary suspension of post-synthesis mismatch repair, resembling mutagenesis characteristic of some cancers. Stress-induced mutation mechanisms may provide important models for genome instability underlying some cancers and genetic diseases, resistance to chemotherapeutic and antibiotic drugs, pathogenicity of microbes, and many other important evolutionary processes. This book covers pathways of stress-induced mutagenesis in all systems. The principle focus is mammalian systems, but much of what is known of these pathways comes from non-mammalian systems.