What's the difference between asbestos and crocidolite?

Asbestos


Definition:

  • (n.) A variety of amphibole or of pyroxene, occurring in long and delicate fibers, or in fibrous masses or seams, usually of a white, gray, or green-gray color. The name is also given to a similar variety of serpentine.

Example Sentences:

  • (1) Three subcohorts were defined: 3212 men whose only exposure to asbestos was to amosite; 3430 exposed to crocidolite; and 675 to both amphiboles.
  • (2) Trichophytosis (T. equinum) is characterized as typical numerous small and round patches, covered by small, bran-like, asbestos-coloured scales.
  • (3) Using recently published data from the Surveillance, Epidemiology, and End Results project, coupled with the previously published estimates, projected asbestos related malignant mesothelioma mortality in the United States for the period 1985-2009 was estimated to be 21,500.
  • (4) Crocidolite asbestos fibers are rapidly ingested in large amounts by Tetrahymena.
  • (5) The benign localized mesothelioma is usually considered in the differential diagnosis of pleural tumors, but it is not related to asbestos exposure.
  • (6) This study examined different markers of lung immunologic and inflammatory responses to previous asbestos exposure.
  • (7) The role of alveolar macrophage (AM)-derived secretory products in fibroblast stimulation after the instillation of long and short asbestos to rat lungs is now investigated.
  • (8) Attention to the hazards of asbestos has aroused concern among many healthy persons who have been exposed at some time to one of the world's most versatile materials.
  • (9) The high sites' density with basic character, evidenced by use of various probe molecules, is very similar for the two asbestos types (chrysotile and crocidolite) and on the same order as the density encountered in some catalysts.
  • (10) Categorization of the pattern of physiologic abnormalities in patients with asbestos-associated disease may be important for clinical, compensation, and epidemiologic reasons.
  • (11) These results have been compared with asbestos samples obtained from the National Institute of Environmental Health Sciences (NIEHS).
  • (12) Results indicated that the percentage of S cells was similar in asbestos-treated and untreated cultures.
  • (13) The various neoplasms attributed to asbestos in the next decades posed an additional question: What influence did the fibrous shape of the particles have on carcinogenic potential?
  • (14) In 1964 it was first reported that asbestos workers had a higher risk of gastrointestinal cancer.
  • (15) There is no doubt that the presence of asbestos in the coal mine is one of the pathogenic factors of pneumoconiosis.
  • (16) We examined whether exposure of macrophages to crocidolite asbestos induced lipid peroxidation as measured by the thiobarbituric acid assay.
  • (17) The findings suggest widespread exposure to asbestos dust; occupational histories appeared to indicate the source of exposure in some but not all patients.
  • (18) The present standard method for evaluating asbestos fiber concentrations in workroom air excludes fibers less than 5 micron long even though it has been shown that small fiber concentrations dominate in a dust cloud.
  • (19) Among patients with mesothelioma a history of asbestos exposure was obtained in 44%, a history of no exposure in 22% and no specific mention of asbestos in 34%.
  • (20) Previous suggestions for converting TEM measurements to PCM equivalents lack generality because they fail to take into account the size distribution of the asbestos particles and the expectation that fiber-size distributions in current nonoccupational environments could differ from the workplaces of the past on which the risk equations are based.

Crocidolite


Definition:

  • (n.) A mineral occuring in silky fibers of a lavender blue color. It is related to hornblende and is essentially a silicate of iron and soda; -- called also blue asbestus. A silicified form, in which the fibers penetrating quartz are changed to oxide of iron, is the yellow brown tiger-eye of the jewelers.

Example Sentences:

  • (1) Three subcohorts were defined: 3212 men whose only exposure to asbestos was to amosite; 3430 exposed to crocidolite; and 675 to both amphiboles.
  • (2) Crocidolite asbestos fibers are rapidly ingested in large amounts by Tetrahymena.
  • (3) The high sites' density with basic character, evidenced by use of various probe molecules, is very similar for the two asbestos types (chrysotile and crocidolite) and on the same order as the density encountered in some catalysts.
  • (4) However, suspension of crocidolite in 50 mM NaCl, pH 7.5, did not result in a measurable amount of O2 consumption.
  • (5) We examined whether exposure of macrophages to crocidolite asbestos induced lipid peroxidation as measured by the thiobarbituric acid assay.
  • (6) Fischer 344 (F344) rats were exposed for 10 and 20 days to National Institute of Environmental Health Sciences (NIEHS) crocidolite asbestos while sham controls were exposed to air only.
  • (7) To determine whether exposure to crocidolite is associated with excess mortality, the authors calculated standardized mortality ratios based on deaths in South African crocidolite mining districts from 1968 to 1980 for selected causes of death.
  • (8) Thus, crocidolite-induced activation of PKC does not appear to be mediated through the same mechanism as classical phorbol ester tumor promoters, compounds which activate PKC by structurally resembling diacylglycerol.
  • (9) Crocidolite fibres tended to be longer in the gas mask workers than in the paraoccupational group and longer than chrysotile in both groups.
  • (10) A high incidence of tumours (most of them mesotheliomas) was induced in rats by intraperitoneal injection of fibrous dusts (chrysotile, palygorscite, crocidolite, glass fibres, nemalite).
  • (11) Since in some respect the NADH-diaphorase quinone system may reflect the situation in the activated macrophage, crocidolite activation may represent a biochemical model system describing potential asbestos toxicity.
  • (12) In order to characterize the pulmonary inflammation caused by crocidolite inhalation, GLS and BAL findings were related to chest x-ray film changes graded according to the ILO classification of roentgenograms of pneumoconioses.
  • (13) The data are consistent with there being no threshold dose of crocidolite exposure for the development of radiographic abnormality in this group.
  • (14) This showed that the data derived from the dose responses obtained by the intrapleural administration of fibres to rats ranked the relative carcinogenicity of erionite, crocidolite and chrysotile in accord with the known clinical mesothelioma induction in man after exposure to these fibres.
  • (15) Cytology and histology material from 46 bronchogenic carcinomas occurring in ex-workers from the Wittenoom crocidolite mine and mill in Western Australia and a matched random sample of 234 other bronchogenic carcinomas occurring in Western Australia over the same period were reviewed by a single histopathologist without knowledge of asbestos exposure status.
  • (16) These results suggest that crocidolite-induced injury to macrophages depends on the formation of reactive oxygen metabolites.
  • (17) From present working conditions with much lower concentrations of chrysotile and no crocidolite no more occupational cancers are expected in the asbestos cement industry.
  • (18) The rate of induction in the chrysotile group (43.1%) was slightly lower than that in the crocidolite group (56.7%).
  • (19) SOD inhibited the effect of crocidolite, because SOD reacted with .O2- released by stimulation with crocidolite and inhibited the subsequent development of .OH.
  • (20) The effect of a single intraperitoneal injection of crocidolite asbestos fibres on the peritoneal cell population were studied.

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