Download or read book Inhalation Toxicology of Red and Violet Dye Mixtures Chamber Concentration and Particle Size Distribution Report written by Mark A. Higuchi and published by . This book was released on 1990 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: An inhalation exposure facility was developed at the U.S. Environmental Protection Agency, Research Triangle Park, NC, to conduct inhalation exposures of rodents and guinea pigs to dye mixtures used by the U.S. Army in the manufacture of smoke munitions. Initially, an evaluation of the prototype chamber aerosol homogeneity was conducted to determine the uniformity and reproducibility of the concentration and particle size of dye aerosol throughout the breathing zone of the test animals(Davies, et al.) The red grenade mixture was formulated by combining the anthraquinone dye Disperse Red 11 (DR11) and the azo dye Solvent Red 1 (SR1); the violet grenade mixture was formulated from DR11 and Disperse Blue 3 (DB3), another anthraquinone dye. The three dyes, DR11, SR1, and DB3, were chemically analyzed for purity and optically examined for size and shape. All pure dyes appeared to be stable at room temperature except DB3, which decomposes if not stored at 4C. The particle size ranges varied for each pure dye and structures were either amorphous(azo dye) or crystalline(anthraquinone dyes).
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Pollution Control written by and published by . This book was released on 1991 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991 with total page 1652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EPA Publications Bibliography written by and published by . This book was released on 1991-10 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report of the Inhalation Toxicology Research Institute written by Inhalation Toxicology Research Institute and published by . This book was released on 1978 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Inhalation Toxicity of Dyes Present in Colored Smoke Munitions Aerosol Measurements in the Workplace at Pine Bluff Arkansas written by Rogene F. Henderson and published by . This book was released on 1985 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lovelace Inhalation Toxicology Research Institute has been conducting inhalation toxicity studies on the organic dyes used in colored smoke munitions to provide a health hazard assessment for the workers engaged in fabrication of these smoke munitions. This report summarizes the results of a field sampling effort at the United States Army's Pine Bluff Arsenal to measure the size distributions and aerosol concentrations to which workers might be exposed. Aerosol samples were taken in the workplace during routine operation of the colored smoke grenade fabrication facility. During this sampling period, the M18 yellow smoke grenade was being produced. Filter samples were used to determine the concentration of airborne dye-containing material and cascade impactors were used to determine the particle size distributions. Aerosol samples were analyzed for solvent yellow (SY) by reverse-phase, high-pressure liquid chromatography (HPLC). Dye-containing aerosol concentrations ranged from 0.1 to about 1.5 mg/m3 in the general vicinity of some of the workers. Chemical analyses showed that 40 percent of the total airborne particulate matter was SY dye. Impactor samples indicated that 50-70% of the aerosol was of a size that could be inhaled. Thus the range of air concentrations for worker exposures to the SY dye was
Download or read book Inhalation Toxicology Studies of Aerosolized Products Final Report written by United States. Food and Drug Administration and published by . This book was released on 1979 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inhalation Toxicity of Single Materials and Mixtures written by Catherine Aranyi and published by . This book was released on 1990 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: An inhalation exposure generation and monitoring system was develop and tested for exposing laboratory rats to: (1) solid particulate aerosols, (2) solid-liquid aerosol mixtures, (3) Cristobalite aerosol (positive control) and (4) filtered air (normal control). The test facility consisted of two laboratories: one with five 1 cu.m. inhalation chambers used for exposures to test aerosols, and the second with two chambers for exposure of control rats to filtered air. The aerosol exposure chambers were interfaced with two types of aerosol generators: one for the solid particulate aerosols, with liquid aerosols and with solid-liquid aerosol mixtures. Particle size distribution was measured by a Quartz Crystal Microbalance-based cascade impactor. Selected filter samples were analyzed by HPLC to show that neither the aerosol generation process, nor the mixing of solid particulate and PBL aerosols produced any degradation of PBL. Spatial and temporal homogeneity of aerosol concentration and particle size within the chambers were established through a procedure of simultaneous sampling. Statistical analysis of the data demonstrated that the total variation in aerosol concentrations was within the + or - 20% limits set for the study at all concentration levels tested. (jes).
Download or read book Toxicity of Military Smokes and Obscurants written by National Research Council and published by National Academies Press. This book was released on 1999-09-24 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of smokes and obscurants have been developed and used to screen armed forces from view, signal friendly forces, and mark positions. Smokes are produced by burning or vaporizing particular products. Obscurants are anthropogenic or naturally occurring particles suspended in the air. They block or weaken transmission of particular parts of the electromagnetic spectrum, such as visible and infrared radiation or microwaves. Fog, mist, and dust are examples of natural obscurants. White phosphorus and hexachloroethane smokes are examples of anthropogenic obscurants. The U.S. Army seeks to reduce the likelihood that exposure to smokes and obscurants during training would have adverse health effects on military personnel or civilians. To protect the health of exposed individuals, the Office of the Army Surgeon General requested that the National Research Council (NRC) independently review data on the toxicity of smokes and obscurants and recommend exposure guidance levels for military personnel in training and for the general public residing or working near military-training facilities.
Download or read book Standard Methods for the Examination of Water and Wastewater written by American Public Health Association and published by . This book was released on 1981 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicological Profile for Pyrethrins and Pyrethroids written by and published by . This book was released on 2003 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicological Profile for Cresols written by and published by . This book was released on 1992 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Dispersants in Marine Oil Spill Response written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-04-24 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whether the result of an oil well blowout, vessel collision or grounding, leaking pipeline, or other incident at sea, each marine oil spill will present unique circumstances and challenges. The oil type and properties, location, time of year, duration of spill, water depth, environmental conditions, affected biomes, potential human community impact, and available resources may vary significantly. Also, each spill may be governed by policy guidelines, such as those set forth in the National Response Plan, Regional Response Plans, or Area Contingency Plans. To respond effectively to the specific conditions presented during an oil spill, spill responders have used a variety of response optionsâ€"including mechanical recovery of oil using skimmers and booms, in situ burning of oil, monitored natural attenuation of oil, and dispersion of oil by chemical dispersants. Because each response method has advantages and disadvantages, it is important to understand specific scenarios where a net benefit may be achieved by using a particular tool or combination of tools. This report builds on two previous National Research Council reports on dispersant use to provide a current understanding of the state of science and to inform future marine oil spill response operations. The response to the 2010 Deepwater Horizon spill included an unprecedented use of dispersants via both surface application and subsea injection. The magnitude of the spill stimulated interest and funding for research on oil spill response, and dispersant use in particular. This study assesses the effects and efficacy of dispersants as an oil spill response tool and evaluates trade-offs associated with dispersant use.
Download or read book OECD Guidelines for the Testing of Chemicals Section 4 Test No 428 Skin Absorption In Vitro Method written by OECD and published by OECD Publishing. This book was released on 2004-11-23 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Test method has been designed to provide information on absorption of a test substance, (ideally radiolabelled), applied to the surface of a skin sample separating the two chambers (a donor chamber and a receptor chamber) of a diffusion cell ...
Download or read book WHO Laboratory Manual for the Examination of Human Semen and Sperm Cervical Mucus Interaction written by World Health Organisation and published by Cambridge University Press. This book was released on 1999-05-13 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive and essential source of reference for all laboratories involved in the analysis of human semen.
Download or read book Aerosol Science and Technology written by David S. Ensor and published by RTI Press. This book was released on 2011-10-06 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerosol Science and Technology: History and Reviews captures an exciting slice of history in the evolution of aerosol science. It presents in-depth biographies of four leading international aerosol researchers and highlights pivotal research institutions in New York, Minnesota, and Austria. One collection of chapters reflects on the legacy of the Pasadena smog experiment, while another presents a fascinating overview of military applications and nuclear aerosols. Finally, prominent researchers offer detailed reviews of aerosol measurement, processes, experiments, and technology that changed the face of aerosol science. This volume is the third in a series and is supported by the American Association for Aerosol Research (AAAR) History Working Group, whose goal is to produce archival books from its symposiums on the history of aerosol science to ensure a lasting record. It is based on papers presented at the Third Aerosol History Symposium on September 8 and 9, 2006, in St. Paul, Minnesota, USA.
