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Toxicological Studies On Beryllium Oxides And Beryllium Containing Exhaust Products
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Book Synopsis Toxicological Studies on Beryllium Oxides and Beryllium-containing Exhaust Products by : Howard C. Spencer
Download or read book Toxicological Studies on Beryllium Oxides and Beryllium-containing Exhaust Products written by Howard C. Spencer and published by . This book was released on 1968 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of long-term studies on rats and rabbits, injected intratracheally with well-characterized key samples of beryllium oxide prepared by calcining beryllium hydroxide for 10 hours at 500, 1100 and 1600 C, respectively, show clearly that there is a definite gradation in biological response depending upon the oxide administered. Thus, the oxide calcined at 500 C was highly active as judged by histopathological examination of the lungs, incidence of tumors, and translocation of beryllium from the lungs to other tissues. In contrast, the oxide calcined at 1600 C showed only minimal effects. Dose-response studies were carried out, using carefully prepared subsamples of 'respirable particle size' (1 to 5 microns) of the three key oxides; results showed a definite gradation in response which diminishes with decreasing dosages of the administered oxide. Investigations on motor exhaust products show that some samples have chemical, physical, and toxicological properties similar to the beryllium oxide calcined at 1600 C. On the other hand, other samples are heterogeneous, contain considerable quantities of water-soluble beryllium, and vary in toxicity. The mechanism of toxic action of beryllium oxide was investigated through study of chemical and physical properties, solubility and adsorption studies, serum electrophoretic analyses, and immunological experiments. Suggestions are made for further studies. (Author).
Book Synopsis The Toxicology of Beryllium by : National Institute for Occupational Safety and Health
Download or read book The Toxicology of Beryllium written by National Institute for Occupational Safety and Health and published by . This book was released on 1972 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Program on Beryllium Oxide Analysis and Toxicity by :
Download or read book Research Program on Beryllium Oxide Analysis and Toxicity written by and published by . This book was released on 1972 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The carcinogenic activity of BeO has been shown to be a function of the temperature to which the beryllium has been exposed. Examination of the toxicological properties of various rocket exhaust products indicate that some products resemble high-fired BeO in their lack of carcinogenic activity, while others contain considerable quantities of water soluble beryllium and vary in toxicity. In analyzing blood samples it is necessary to obtain the total Be concentration although as mentioned some forms are not as reactive as others. Thus the research involved devising reaction conditions for the conversion of low-fired BeO and high-fired BeO such that the reaction mixture was in a form suitable for the gas chromatographic measurement of beryllium. Also discussed is the applicability of the technique for the conversion of the oxides in blood and tissue matrices.
Book Synopsis Beryllium and Beryllium Compounds by : Robert M. Bruce
Download or read book Beryllium and Beryllium Compounds written by Robert M. Bruce and published by . This book was released on 2001 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume are assessed the risks to human health and the environment of Beryllium, found in the earth's crust at an average concentration of approximately 2.8-5.0 mg/kg. Beryllium-containing minerals are processed to beryllium metal, beryllium alloys, and beryllium oxide for use in aerospace, weapons, nuclear and electronics industries. The general population is exposed to beryllium primarily in food and drinking-water, with smaller contributions from air and incidental ingestion of dust. There are no human studies addressing the toxicokinetics of beryllium or beryllium compounds; however, beryllium has been found in the lungs and urine of non-occupationally exposed individuals. There are no reliable data on the oral toxicity of beryllium in humans. The lungs are the primary target of inhalation exposure to beryllium in animals and humans. Short-term or repeated exposures of humans to beryllium or its compounds can result in an acute or chronic form of lung disease. Increases in lung cancer mortality were observed in cohort mortality studies of beryllium processing workers.
Book Synopsis Managing Health Effects of Beryllium Exposure by : National Research Council
Download or read book Managing Health Effects of Beryllium Exposure written by National Research Council and published by National Academies Press. This book was released on 2008-09-29 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beryllium is a lightweight metal that is used for its exceptional strength and high heat-absorbing capability. Beryllium and its alloys can be found in many important technologies in the defense and aeronautics industries, such as nuclear devices, satellite systems, radar systems, and aircraft bushings and bearings. Pulmonary disease associated with exposure to beryllium has been recognized and studied since the early 1940s, and an occupational guideline for limiting exposure to beryllium has been in place since 1949. Over the last few decades, much has been learned about chronic beryllium disease and factors that contribute to its occurrence in exposed people. Despite reduced workplace exposure, chronic beryllium disease continues to occur. Those developments have led to debates about the adequacy of the long-standing occupational exposure limit for protecting worker health. This book, requested by the U.S. Air Force to help to determine the steps necessary to protect its workforce from the effects of beryllium used in military aerospace applications, reviews the scientific literature on beryllium and outlines an exposure and disease management program for its protecting workers.
Book Synopsis Occupational Exposure to Beryllium by : National Institute for Occupational Safety and Health
Download or read book Occupational Exposure to Beryllium written by National Institute for Occupational Safety and Health and published by . This book was released on 1972 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Criteria for a Recommended Standard ... Occupational Exposure to Beryllium by : National Institute for Occupational Safety and Health
Download or read book Criteria for a Recommended Standard ... Occupational Exposure to Beryllium written by National Institute for Occupational Safety and Health and published by . This book was released on 1972 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Pennsylvania State University. Center for Air Environment Studies Publisher : ISBN 13 : Total Pages :210 pages Book Rating :4.:/5 (31 download)
Book Synopsis Guide to Research in Air Pollution by : Pennsylvania State University. Center for Air Environment Studies
Download or read book Guide to Research in Air Pollution written by Pennsylvania State University. Center for Air Environment Studies and published by . This book was released on 1969 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide to Research in Air Pollution, Projects Active in Calendar Year 1969; Seventh Edition by : Pennsylvania State University. Center for Air Environment Studies
Download or read book Guide to Research in Air Pollution, Projects Active in Calendar Year 1969; Seventh Edition written by Pennsylvania State University. Center for Air Environment Studies and published by . This book was released on 1970 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Abstract Bulletin by : Defense Documentation Center (U.S.)
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toxicity of Beryllium Compounds by : Lloyd B. Tepper
Download or read book Toxicity of Beryllium Compounds written by Lloyd B. Tepper and published by . This book was released on 1961 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Managing Health Effects of Beryllium Exposure by : National Research Council
Download or read book Managing Health Effects of Beryllium Exposure written by National Research Council and published by National Academies Press. This book was released on 2008-10-29 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beryllium is a lightweight metal that is used for its exceptional strength and high heat-absorbing capability. Beryllium and its alloys can be found in many important technologies in the defense and aeronautics industries, such as nuclear devices, satellite systems, radar systems, and aircraft bushings and bearings. Pulmonary disease associated with exposure to beryllium has been recognized and studied since the early 1940s, and an occupational guideline for limiting exposure to beryllium has been in place since 1949. Over the last few decades, much has been learned about chronic beryllium disease and factors that contribute to its occurrence in exposed people. Despite reduced workplace exposure, chronic beryllium disease continues to occur. Those developments have led to debates about the adequacy of the long-standing occupational exposure limit for protecting worker health. This book, requested by the U.S. Air Force to help to determine the steps necessary to protect its workforce from the effects of beryllium used in military aerospace applications, reviews the scientific literature on beryllium and outlines an exposure and disease management program for its protecting workers.
Book Synopsis Public Health Service Publication by :
Download or read book Public Health Service Publication written by and published by . This book was released on 1970 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toxicity Bibliography written by and published by . This book was released on 1970 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toxicological Profile for Beryllium by :
Download or read book Toxicological Profile for Beryllium written by and published by . This book was released on 1993 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toxicity and Other Hazards of Beryllium and Rocket Propellants by :
Download or read book Toxicity and Other Hazards of Beryllium and Rocket Propellants written by and published by . This book was released on 1959 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1968 with total page 1704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
