asbestos

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asbestos

 [as-bes´tos]
fibrous calcium and magnesium silicate, a nonburning compound used in roofing materials, insulation for electric circuits, brake linings, and many other products that must be fire resistant. Alternative materials are being developed to replace asbestos because fine asbestos fibers can be inhaled, causing asbestosis, pleural mesothelioma, and other types of lung cancer. In 1971, asbestos became the first material to be regulated by the Occupational Safety and Health Administration.

as·bes·tos

(as-bes'tŏs), Avoid the mispronunciation as-bes'ōz.
The commercial product, after mining and processing, obtained from a family of fibrous hydrated silicates divided mineralogically into amphiboles (amosite, anthrophyllite, and crocidolite) and serpentines (chrysotile); it is virtually insoluble and is used to provide tensile strength and moldability, thermal insulation, and resistance to fire, heat, and corrosion; inhalation of asbestos particles can cause asbestosis, pleural plaques, pleural fibrosis, pleural effusion, mesothelioma, and lung cancer.
[G. unquenchable; so-called in the erroneous belief that when heated, its warmth could not be quenched]

asbestos

/as·bes·tos/ (as-bes´tos) a fibrous incombustible magnesium and calcium silicate used in thermal insulation; its dust causes asbestosis and acts as an epigenetic carcinogen for pleural mesothelioma. It is divided into two main classes: amphibole a., less widely used and more highly carcinogenic and including amosite and crocidolite, and serpentine a., including chrysotile.

asbestos

[asbes′təs]
Etymology: Gk, asbestos, unquenchable
a group of fibrous impure magnesium silicate minerals. Inhalation of the fibers can lead to pulmonary fibrosis if the fibers accumulate in terminal bronchioles. Continued exposure to asbestos fibers can result in lung cancer.

asbestos

An incombustible mineral fibre once widely used in industry and commercial products (the USA, for example, used 30 billion tons of asbestos since 1900), such as insulation, brakes, fire-proofing, etc., prolonged overexposure to which may lead to asbestosis and possibly cancer.

Maximum exposure levels (1976 OSHA standard)
2 fibres/cm3/8 hours.

asbestos

Environment Any finished natural product containing a type of incombustible mineral fiber; the US has used 30 billion tons of asbestos since 1900; it is a component of ± 3000 manufactured products; maximum exposure levels–1976 OSHA standards = 2 fibers/ccm3/8 hr period

ASBESTOS

(as-bes'tŏs)
Acronym used in assessing casualties from chemical (and radiologic) agents. The components of the acronym are A for agent (type of chemical or radiation); S for state (e.g., solid, liquid, gas, vapor, aerosol); B for body site, or route of exposure (e.g., inhalational, percutaneous, ocular, enteral, parenteral); E for effects (local vs. systemic); S for severity of effects and of exposure; T for time course (e.g., time from exposure, length of latent period, prognosis); O for other diagnoses (both instead of and in addition to the agent originally considered); and S for synergism (interaction among multiple diagnoses).

as·bes·tos

(as-bes'tŏs)
Product obtained from fibrous hydrated silicates divided into amphiboles and serpentines; it is insoluble and is used to provide tensile strength and moldability, thermal insulation, and resistance to fire, heat, and corrosion; inhalation of asbestos particles can cause asbestosis and cancer of the lung and pleura.
[G. unquenchable; so-called in the erroneous belief that when heated, its warmth could not be quenched]

Asbestos

A naturally occurring mineral, utilized worldwide for its durability and heat resistant qualities. Extremely fibrous in nature, asbestos particles can easily enter the respiratory system and damage sensitive tissue. This damage can result in asbestosis, mesothelioma, and lung cancer.
Mentioned in: Asbestosis, Mesothelioma

as·bes·tos

(as-bes'tŏs)
The commercial product, after mining and processing, obtained from a family of fibrous hydrated silicates. Inhalation of such particles can cause asbestosis, pleural plaques, and other disorders.
[G. unquenchable; so-called in the erroneous belief that when heated, its warmth could not be quenched]

asbestos (asbes´təs),

n a group of fibrous impure magnesium silicate minerals. Inhalation of the fibers can lead to pulmonary fibrosis.
Ascaris
n a genus of large parasitic intestinal roundworms such as
A. lumbricoides.

asbestos

a naturally occurring amphibole mineral in fibrous form with the fibers lying in parallel in plates; causes asbestosis in humans. Called also horneblende.

Patient discussion about asbestos

Q. Why have i been seeing so many commercials regarding asbestos related mesothelioma? I have been quite curious to know why law firms are pushing mesothelioma ads.

A. Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles.The liability resulting from the sheer number of lawsuits and people affected has reached billions of dollars.The amounts and method of allocating compensation have been the source of many court cases, reaching up to the United States Supreme Court.
so where ever there's money- there's lawyers..

More discussions about asbestos
References in periodicals archive ?
Unlike Type I AC pipes, silica was added to the mixture of asbestos fibers and Portland cement during the manufacturing of Type II AC pipes.
Similar results were reported with crocidolite asbestos fibers.
When exposure to asbestos fibers is combined with cigarette smoking, the incidence of bronchogenic carcinoma is approximately 55-fold greater than normal.
Due to this time factor, inhalation of asbestos fibers during childhood would have a greater impact on risk than would similar exposure later in life.
Given the variability in the breadth of knowledge for specific mineral fibers, a full discussion of each type of asbestos fibers is beyond the scope of this summary report.
The optical and electron microscopic determination of pulmonary asbestos fiber concentration and its relation to the human pathological reaction.
The insoluble asbestos fibers may instead trigger PKC activation by some unknown change in the membrane, they say.
The uncoated fiber burden in this individual indicated an appreciable number of anthophyllite asbestos fibers.
This case sends a clear message that we intend to make sure that building owners and contractors act responsibly to prevent airborne releases of asbestos fibers during renovation work.
The hypothesis we're testing is that binding of cell surface receptors to asbestos fibers triggers a signal event, which initiates the cancer.
If damaged, asbestos fibers can become airborne, putting individuals (such as oil refinery workers) at risk of inhalation.
Each of the macroscopic asbestos fibers is actually a bundle of thinner fibers made up of fibrils.

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