What's the difference between asbestos and tremolite?
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.
Tremolite
Definition:
(n.) A white variety of amphibole, or hornblende, occurring in long, bladelike crystals, and coarsely fibrous masses.
Example Sentences:
(1) The greatest care should be exercised by industry in handling tremolite or materials contaminated with it.
(2) After allowance for the fact that regression analyses suggested that the proportion of tremolite in dust was probably 2.5 times higher in Thetford Mines, Quebec, than in Charleston, the results from both matched pair and stratification analyses of tremolite fibre concentrations in lung were almost the same as for chrysotile.
(3) A study was conducted to estimate the exposure-response relationship for tremolite-actinolite fiber exposure and radiographic findings among 184 men employed at a Montana vermiculite mine and mill.
(4) Fiber identification for major elemental content, also done by using scanning electron microscope equipped with an energy dispersive X-ray analyzer, indicated the presence of tremolite along with chrysotile.
(5) In the control group, predominant fibers were tremolite or actinolite.
(6) The risk associated with tremolite has been demonstrated in Corsica, Cyprus, the United States, and Canada.
(7) Of particular importance is an apparent increase in the proportion of mesothelioma risk attributable to tremolite, since the fibers heretofore most responsible for that disease--commercial amphiboles--have been or are being severely regulated or completely eliminated in production and use.
(8) It has been found that the silicates widely used in America can contain three forms of asbestos, anthophyllite, tremolite, and chrysolite.
(9) The first reported case was a village woman whose lung tissue contained amphibole asbestos fibres, which were later identified as tremolite.
(10) The mineral assemblage includes antigorite or lizardite as well as chrysotile and tremolite.
(11) The ability of chelators and ascorbic acid to mobilize iron from crocidolite, amosite, medium- and short-fiber chrysotile, and tremolite was investigated.
(12) Concentrations of amosite, crocidolite, and tremolite fibers, and of typical asbestos bodies discriminated sharply between cases and referents.
(13) Any possible adverse effects of work with vermiculite, minimally contaminated with fibrous or non-fibrous tremolite, were thus beyond the limits of detection in this workforce.
(14) A brake on regulation is partially due to a convergence of opinion of unlikely and unintentional allies: industries producing tremolite-containing materials and some epidemiologists resisting attribution of risk to tremolite on the grounds that its known effects--pleural plaques, asbestosis, lung cancer and mesothelioma--are principally due to chrysotile, which is often contaminated with fibrous tremolite.
(15) Inhabitants of the Metsovo area in Northwest Greece (population, 4,000) have been exposed to asbestos through the use of whitewash containing tremolite.
(16) Two samples of nonfibrous tremolite produced respirable dust samples containing numerous elongated fragments with aspect ratios greater than 3:1, which therefore fitted the definition of respirable fibers.
(17) They ignore the basic carcinogenic quality of fibrous tremolite, shown in both animal and epidemiological studies.
(18) In north-east Corsica, asbestos outcrops are a source of environmental pollution, as assessed by airborne concentrations of chrysotile and tremolite that are significantly higher in the north-east than the north-west.
(19) Health effects have been documented among American vermiculite workers who mined and processed vermiculite contaminated with amphibole asbestos, viz., tremolite-actinolite.
(20) Chest roentgenograms, pulmonary function assessment by spirometry, respiratory symptoms, smoking history, and occupational history by questionnaire were obtained from 121 male talc miners and millers exposed to talc containing tremolite and anthophyllite asbestiform fibers.