Results 211 to 220 of about 12,854 (250)
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Chrysotile, tremolite and carcinogenicity
The Annals of Occupational Hygiene, 1997It has been suspected for many years that amphibole fibres in the tremolite series, a low level contaminant of chrysotile asbestos, may contribute disproportionately to the incidence of mesothelioma and perhaps other exposure-related cancers. A cohort of some 11,000 Quebec chrysotile workers, 80% of whom have now died, provided the opportunity to ...
J C, McDonald, A D, McDonald
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Geoinspired synthetic chrysotile nanotubes
Journal of Materials Research, 2006Since the 1991 discovery of hollow cylindrical carbon-based unidimensional structures, the nanotubular form of matter has been thoroughly investigated leading to a wealth of literature. Their particular features are not limited to graphite but are common in many inorganic highly anisotropic two-dimensional layered compounds.
ROVERI, NORBERTO +5 more
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Tubular‐Shaped Stoichiometric Chrysotile Nanocrystals
Chemistry – A European Journal, 2004AbstractStoichiometric chrysotile tubular nanocrystals have been synthesized as possible starting materials for applications toward nanotechnology, and as a standard reference sample for the investigation of the molecular interactions between chrysotile, the most utilized asbestos, and biological systems.
FALINI, GIUSEPPE +6 more
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The Annals of Occupational Hygiene, 1994
Mesotheliomas are rare. While most are reported to be associated with exposure to durable fibres, a proportion are not caused by the inhalation of fibres at all. Reports of individual cases and studies of small groups are unreliable as evidence of cause because: (a) diagnosis is often unreliable; (b) even if chrysotile fibres are found in lung tissues,
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Mesotheliomas are rare. While most are reported to be associated with exposure to durable fibres, a proportion are not caused by the inhalation of fibres at all. Reports of individual cases and studies of small groups are unreliable as evidence of cause because: (a) diagnosis is often unreliable; (b) even if chrysotile fibres are found in lung tissues,
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Detection of chrysotile asbestos by using a chrysotile‐binding protein
Biotechnology and Bioengineering, 2007AbstractIn the current studies, we found that the DksA protein from Escherichia coli binds strongly to chrysotile, which is the most commonly used form of asbestos. We developed a convenient colorimetric assay for chrysotile using a fusion of DksA and alkaline phosphatase along with 5‐bromo‐4‐chloro‐3‐indolyl‐phosphate and nitro blue tetrazolium as ...
Akio, Kuroda +4 more
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Journal of Crystal Growth, 1977
Abstract Short, uniform fibers of chrysotile asbestos exhibit strong interparticle forces parallel to the fiber axis. Wetting a matte of these fibers, and then allowing it to dry, results in the aggregation of the fibers into distinct geometrical shapes.
A.E. Charola, S.Z. Lewin, M.J. Yoder
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Abstract Short, uniform fibers of chrysotile asbestos exhibit strong interparticle forces parallel to the fiber axis. Wetting a matte of these fibers, and then allowing it to dry, results in the aggregation of the fibers into distinct geometrical shapes.
A.E. Charola, S.Z. Lewin, M.J. Yoder
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The Annals of Occupational Hygiene, 1994
Chrysotile asbestos was used in thousands of commercial products in the past. However, current usage is confined to four principal product categories. These are: asbestos cement; friction materials; roof coatings and cements; and gaskets. Current products, different from several friable products formerly in major use and discontinued some 20 years ago,
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Chrysotile asbestos was used in thousands of commercial products in the past. However, current usage is confined to four principal product categories. These are: asbestos cement; friction materials; roof coatings and cements; and gaskets. Current products, different from several friable products formerly in major use and discontinued some 20 years ago,
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Synthesis of Fe‐doped chrysotile and characterization of the resulting chrysotile fibers
Crystal Research and Technology, 2009AbstractThis study describes the formation of Fe‐doped chrysotile fibers with partial and total substitution of Mg by Fe. Syntheses were carried out with various starting mixtures (oxides, pure synthetic forsterite) in an externally heated pressure vessel in controlled hydrothermal conditions: temperature, 270 – 400 °C; pressure, 0.5 – 2 kbar; duration
Bloise A.[1 +6 more
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Cytogenetic studies on chrysotile asbestos
Environmental Research, 1975Abstract The cytogenetic effects of chrysotile asbestos (chrysotile A) in vivo in Rhesus monkeys and Swiss albino mice, and in vitro in embryonic hamster cells were investigated. Single oral dosages of chrysotile, 100 or 500 mg/kg, failed to induce chromosome aberrations in bone marrow cells of Rhesus monkeys.
K S, Lavappa, M M, Fu, S S, Epstein
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Chrysotile Asbestos in Urban Air
Nature, 1971THE industrial use of chrysotile asbestos is increasing and the question of whether its concentration in urban air constitutes a hazard has been raised. But measurements of asbestos in air near asbestos factories have proved negative with present analytical methods, so under the sponsorship of the Asbestosis Research Council we are developing a more ...
A L, Rickards, D V, Badami
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