What's the difference between crocidolite and fibrous?
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.
Fibrous
Definition:
(a.) Containing, or consisting of, fibers; as, the fibrous coat of the cocoanut; the fibrous roots of grasses.
Example Sentences:
(1) These immunocytochemical studies clearly demonstrated that cells encountered within the fibrous intimal thickening in the vein graft were inevitably smooth muscle cell in origin.
(2) The lesion (10.6 X 9.8 mm) was a well-defined ellipsoid granuloma due to a foreign body with a central zone of necrosis surrounded entirely by a fibrous wall.
(3) The fibrous matrix and cartilage formed within the nonunion site transformed to osteoid and bone with increased vascularity.
(4) Aside from these characteristic findings of HCC, it was important to reveal the following features for the diagnosis of well differentiated type of small HCC: variable thickening or distortion of trabecular structure in association with nuclear crowding, acinar formation, selective cytoplasmic accumulation of Mallory bodies, nuclear abnormalities consisting of thickening of nucleolus, hepatic cords in close contact with bile ducts or blood vessels, and hepatocytes growing in a fibrous environment.
(5) Fibroblasts and myofibroblasts were the cells seen in the fibrous component.
(6) In the area of the porta hepatis, there were many epithelial luminal structures in fibrous tissue with inflammatory infiltrates.
(7) Thus, multiparae had very thick border zones composed predominantly of large nodules and, additionally, of vacuolated cells and fibrous tissue.
(8) Physiotherapy for 4 to 12 weeks produced improvement, but in four cases early operation for excision of fibrous tissue and lengthening of the triceps was necessary to restore adequate flexion.
(9) A primary inflammatory malignant fibrous histiocytoma of the kidney is reported.
(10) The alveolar stability requires particular properties of both the fibrous skeleton and the alveolar surfactant film.
(11) In castrates, the prostatic stroma became thickened, with a large increase in fibrous material between and surrounding each acinus, although smooth muscle cells retained their normal cytology.
(12) At the same time optical and mechanical systems of the Soviet-made sigmoidoscope, model CBO-1, an apparatus equipped with fibrous optical elements for transmission of ligh and image, now in batch production, are described.
(13) In the remaining patients congenital and acquired osseous alterations, supernumerary scalene muscle, congenital fibrous bands were the etiologic factors.
(14) The use of SDS-polyacrylamide gel electrophoresis of the cyanogen bromide derived peptides from fibrous cartilage collagens enabled to calculate type I to type II collagen ratio in this tissue.
(15) The three different layers of this tissue are: the outer fibrous layer, the central part called proliferation zone and the inner part towards the underlying rib called transition zone.
(16) The latter may primarily be the case in fibrous astrocytes, which were stained in reactive and pathologic conditions.
(17) Other problematic diagnoses were cancer of the head and neck and malignant fibrous histiocytoma.
(18) Six were benign, 11 malignant fibrous, and 3 pure malignant histiocytomas.
(19) Two cases of malignant intracranial fibrous histiocytoma are presented.
(20) The later reaction was characterized by the formation of fibrous tissue without inflammatory cell infiltration.