Download or read book Toxicity of Mixtures of Organic Chemicals to Activated Sludge Microorganisms written by Edward L. Hall and published by . This book was released on 1995 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Joint Effects of Mixtures of Chemicals on Microorganisms Using Quantitative Structure Activity Relationships written by and published by . This book was released on 1993 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicity of 50 organic chemicals to activated sludge microorganisms was determined using the respirometeric technique. Using this experimental database, models for predicting toxicity (IC50 values) were developed using QSAR techniques. Toxicity measurements were also made for sixteen multi-component mixtures. The joint effects of organic chemicals in these mixtures were analyzed by three different approaches. Using the QSAR models developed from single chemical studies, an approach was developed to analyze and predict joint effects of chemicals in mixtures. The result of this study indicated that the joint effects could be considered simple additive for the different classes of chemicals tested. Using the results obtained during the first phase of this project for a surrogate test microorganism - Polytox, toxicity correlations were established between activated sludge and the test cultures.

Download or read book Acclimation of Activated Sludge Organisms to a Mixture of Thirteen Organic Chemicals written by Lori Jean Oswalt and published by . This book was released on 1983 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbial Transformation and Degradation of Toxic Organic Chemicals written by Lily Y. Young and published by Wiley-Liss. This book was released on 1995-08-18 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microorganisms offer a more effective and economical means of reducing or eliminating environmental contamination than more traditional treatment methods. This study examines the role of microbes in the degradation of toxic organic chemicals.

Download or read book Microbial Toxicity of Mixtures of Organic Chemicals Modeling and Validation for Non Uniform Mixtures written by and published by . This book was released on 1997 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Joint effects of binary and multi-component, uniform and non-uniform mixtures assayed in our microbial toxicity studies were found to be simply additive, or essentially simply additive. These results are in agreement with the conclusions reported in the literature on fish toxicity studies. Using QSAR models to predict single chemical toxicity and assuming perfect simple additivity, concentrations of the components in mixtures that would cause 50% inhibition were predicted. These predicted concentrations agreed well with the measured values over nearly three orders of magnitude with r2=0.80 at p=0.0001% for 610 sets of data points from 40 different mixtures on two different microorganisms. The overall average factor of error of these predictions was 1.82. The results of this study provide an impetus to utilize the large number of single chemical QSAR models reported in the literature by other researchers in predicting joint effects in the aquatic toxicology and ecotoxicological fields.

Download or read book Investigations of Biodegradability and Toxicity of Organic Compounds written by Jan Dojlido and published by . This book was released on 1979 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Modeling written by Vijay P. Singh and published by Water Resources Publication. This book was released on 1999 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicity Testing Using Microorganisms written by Gabriel Bitton and published by CRC Press. This book was released on 2019-08-15 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 1986, this two-volume set offers comprehensive insight into the testing of toxic substances using microorganisms as reference. Carefully compiled and filled with a vast repertoire of notes, diagrams, and references this book serves as a useful reference for students of medicine and other practitioners in their respective fields.

Download or read book Toxicity Screening Procedures Using Bacterial Systems written by Dickson Liu and published by CRC Press. This book was released on 1984-06-14 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Dictionary of Substances and Their Effects DOSE A B written by S D. Gangolli and published by Royal Society of Chemistry. This book was released on 2007 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicity Testing Using Microorganisms written by Bernard J. Dutka and published by CRC Press. This book was released on 2019-07-23 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 1986, this two-volume set offers comprehensive insight into the testing of toxic substances using microorganisms as reference. Carefully compiled and filled with a vast repertoire of notes, diagrams, and references this book serves as a useful reference for students of medicine and other practitioners in their respective fields.

Download or read book Biological Wastewater Treatment Revised and Expanded written by Carlos D.M. Filipe and published by CRC Press. This book was released on 1998-10-15 with total page 1098 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by noted experts in the field sharing extensive academic and industrial experience, this thoroughly updated Second Edition covers commonly used and new suspended and attached growth reactors. The authors discuss combined carbon and ammonia oxidation, activated sludge, biological nutrient removal, aerobic digestion, anaerobic processes, lagoons, trickling filters, rotating biological contactors, fluidized beds, and biologically aerated filters. They integrate the principles of biochemical processes with applications in the real world-communicating approaches to the conception, design, operation, and optimization of biochemical unit operations in a comprehensive yet lucid manner.

Download or read book The Dictionary of Substances and their Effects DOSE written by S D Gangolli and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of The Dictionary and Substances and their Effects (DOSE) supersedes the renowned 1st edition. The 1st edition has been completely revised, updated and extended with all the latest significant data on the chemicals known to have adverse effects on lifeforms or the environment. The new edition is a must for all those who need easy access to a single source of the latest essential and fully referenced data on chemicals which are known to have significant toxic or environmental effects. The web database is ideal for targeted searches and customised data retrieval. The 2nd edition of DOSE includes new toxicity, environmental and regulatory data from the world's literature, presented in concise summaries. These new data are essential for the accurate assessment of the risks associated with the use and disposal of chemicals. Data on over 100 chemicals new to this edition have been added, including endocrine disruptors, food carcinogens, pesticides and compounds studied by IARC and NTP. All of the 4000 chemicals contained in the 1st edition have been reviewed. New and updated information for these chemicals includes: * occupational exposure limits for 6 countries * recent toxicity and ecotoxicity data * results of new carcinogenicity, mutagenicity and environmental fate studies * the latest regulatory requirements DOSE 2nd edition comprises 7 hardcover volumes covering over 4000 chemicals alphabetically, and includes indexes of substance names and synonyms, molecular formulae, and CAS Registry Numbers; glossaries of medical terms and Latin to English organism names; an abbreviations listing and a comprehensive guide to the types of data and their origin. DOSE is also available via Knovel's Engineering and Scientific Online Reference, located at www.knovel.com.

Download or read book Transactions of the American Society of Civil Engineers written by American Society of Civil Engineers and published by . This book was released on 1997 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 29-30 include papers of the International Engineering Congress, Chicago, 1893; v. 54 includes papers of the International Engineering Congress, St. Louis, 1904.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Congress on Modelling and Simulation December 6 10 1993 The University of Western Australia written by Michael McAleer and published by . This book was released on 1994 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Ecotoxicology written by Peter P. Calow and published by John Wiley & Sons. This book was released on 2009-06-05 with total page 901 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Ecotoxicology provides a readily accessible, yet critical collection of information on ecotoxicological testing. Now available in a single paperback volume, this handbook represents excellent value. Part A concentrates on techniques, especially those tests used for prediction. Thorough descriptions of the main tests are provided, followed by critical analyses in terms of ease of handling, repeatability and ecological relevance, and finally, an extensive bibliography citing key documents describing test methods and key papers evaluating them. Part B focuses on the toxicants themselves: summarising their ecological effects, describing ways of predicting effects from physico-chemical properties alone, and describing and discussing fate models. Now available as a single volume in paperback An invaluable reference resource