Results 121 to 130 of about 1,748 (149)
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Differentiating Non-Asbestiform Amphibole and Amphibole Asbestos by Size Characteristics
Journal of Occupational and Environmental Hygiene, 2008Mining or processing asbestos minerals can liberate isolated fibers or fiber bundles regulated as airborne asbestos fibers. Coarsely crystalline amphibole minerals are more common than asbestos in many geologic environments, and disturbance can result in the release of prismatic or acicular single crystals or cleavage fragments resembling asbestos ...
Martin, Harper +3 more
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Width Distributions of Asbestos and Non-Asbestos Amphibole Minerals
Indoor and Built Environment, 2009Amphibole asbestos fibers and non-asbestos amphibole particles have been shown to have different size characteristics, in addition to their morphological differences. There is a tendency, however, among laboratories and some regulators to ignore the morphological differences and to simply rely on a minimal aspect ratio to determine whether a particle ...
D.R. Van Orden +3 more
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Antiferromagnetic order in amphibole asbestos
AIP Conference Proceedings, 1975We have made magnetic susceptibility, electron spin resonance, and Mossbauer measurements on two different amphiboles, (Fe, Mg)7Si8O22(OH)2, and crocidolite, Na2Fe5Si8O22 (OH)2, which indicate that these materials are ordered antiferromagnetically at liquid helium temperatures.
J. C. Eisenstein +2 more
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Loss of Surface Reactivity upon Heating Amphibole Asbestos
Langmuir, 2002Two amphibole asbestos, crocidolite and amosite, have been heated at 400 and 800 °C in order to examine the variations in some surface properties relevant to asbestos toxicity, such as iron mobility, free radical generation, and hydrophilicity. At 400 °C, only the surface is modified, while at 800 °C the crystalline structure partially collapses (X-ray
TOMATIS, Maura +3 more
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Electron Microscopy of Amphibole Asbestos Fibres
Proceedings, annual meeting, Electron Microscopy Society of America, 1980The high aspect ratios and small dimensions affect how asbestos fibers enter or are engulfed by cells, and are retained in the lungs. The resulting biological activity presumably is initiated by surface reactions between mineral particles and molecular constituents in the cell. Our
R. M. Fisher +3 more
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Quantification of Amphibole in Chrysotile Asbestos-Containing Products
2021The results of analysis for amphibole fibers in 140 samples of finished products containing chrysotile asbestos are presented in terms of weight percent and fibers per gram. The products include friction materials, joint compounds, roof cements, floor tiles, a dryer felt, dental tapes, insulating paper (heat shields) from vintage consumer electronics ...
Steven P. Compton, James R. Millette
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ANALYSIS OF AMPHIBOLE ASBESTOS IN CHRYSOTILE AND OTHER MINERALS
The Annals of Occupational Hygiene, 1990Chrysotile asbestos and many other mineral raw materials contain amphibole minerals which may be asbestiform. There is currently no analytical method which will detect the presence of amphibole at sufficiently low limits to preclude the possibility of inadvertent exposure of persons handling these materials to hazardous airborne fibre concentrations. A
J, Addison, L S, Davies
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A review of carcinogenicity studies of asbestos and non-asbestos tremolite and other amphiboles
Regulatory Toxicology and Pharmacology, 2008Experimental animal studies comparing asbestos and non-asbestos varieties of tremolite indicate tremolite asbestos is markedly more carcinogenic. By direct analogy, the differences in carcinogenicity between tremolite asbestos and non-asbestos prismatic tremolite should be the same for the other types of amphibole that also crystallize in the asbestos ...
John, Addison, Ernest E, McConnell
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Spontaneous polymerisation on amphibole asbestos: relevance to asbestos removal.
Chemical communications (Cambridge, England), 2001Taking advantage of the spontaneous polymerisation of eugenol to lignin-like species catalysed by the surface of crocidolite fibres, a procedure is proposed, possibly useful in asbestos removal and disposal, where the polymer avoids the release of airborne fibres and also scavenges ROS (reactive oxygen species).
FENOGLIO, Ivana +2 more
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Comparative health effects in mice of Libby amphibole asbestos and a fibrous amphibole from Arizona
Toxicology and Applied Pharmacology, 2017This project developed from studies demonstrating that Libby Amphibole Asbestos (LAA) causes a non-typical set of health outcomes not generally reported for asbestos, including systemic autoimmunity and an unusual and devastating lamellar pleural thickening that progresses to severe pulmonary dysfunction and death.
Jean C. Pfau +6 more
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