Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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exposure from asbestos contamination in outdoor soil and indoor dust at Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) removal and remedial sites. It also provides limited guidance to address asbestos containing material (ACM) and naturally occurring asbestos (NOA) that might be encountered at a site.
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Results. We examined 226 cases of definitive BE and 1,424 controls without BE. There was a greater proportion of patients with self-reported asbestos exposure in cases than controls (16.2 % vs. 12.0 %; p = 0.08) but no significant differences in metal dust, organic solvents, or pesticides. The multivariate model did not show an independent association …
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Residential Proximity to Naturally Occurring Asbestos and Mesothelioma Risk in California Xue-lei Pan, Howard W. Day, Wei Wang, Laurel A. Beckett, and Marc B. Schenker Department of Public Health Sciences, Department of Geology, and Department of Statistics, University of California at Davis, Davis, California Rationale: Little is known …
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To characterize the asbestos exposure that results from the installation and maintenance of these components, an aircraft fitted with asbestos containing brake pads had brake changes performed while both area and personal air samples were taken. The brake changing process took place in a closed, unventilated aircraft hanger and all …
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Furthermore, not even surveys have been conducted in Italy to characterize the correlation between asbestos exposures and the possible occurring of asbestos-related disease. Our objectives are the following: i) to assess and quantify the asbestos exposure cases, ii) to describe the nature and the frequency of asbestos-related diseases among ...
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The understanding by industrial hygienists of the hazards of asbestos and appropriate ways to characterize and control exposure has evolved over the years. ... These early developments set the stage for …
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The main research questions were: (1) to determine actual airborne asbestos fiber levels prevalent in buildings, (2) to characterize peak exposure levels and their significance, and (3) to evaluate the effectiveness of asbestos management and abatement strategies in a scientifically meaningful manner.
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Health Library / Diseases & Conditions / Asbestosis is a type of lung disease caused by breathing in asbestos dust and fibers. The disease causes fibrosis (scarring) …
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The study of occupational exposure to asbestos has been an ongoing activity for at least 75 years, dating back to the papers of Merewether and Price (1930). Since that time, literally tens of thousands of air samples have been collected in an attempt to characterize the concentration of asbestos ass …
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Asbestos is classified as a human carcinogen, and studies have consistently demonstrated that workplace exposure to it increases the risk of developing lung cancer. Few studies have evaluated risks in population-based settings where there is a greater variety in the types of occupations, and exposures. This was a population based …
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A relevant issue for the development of these diseases is the possible association between smoking and exposure to asbestos: the frequency of self-acknowledged smokers in a study was 79.5%, 31 corroborating another research that found 74.4% of smokers with lung cancer. 41 Therefore, smoking cessation is also necessary …
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Two variables were used to characterize asbestos exposure: CEI modeled as a natural log–transformed continuous variable [expressed as ln(CEI + 1)] or categorized according to quartiles of exposure; and TSFE to asbestos, modeled as a time-varying continuous variable or as a categorical variable (0–20, > 20–40, ≥ 40–60, and ≥ …
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Short-term exposure to asbestos dust can lead to mesothelioma and other forms of cancer. But unless the exposure is intense, the risk of cancer from short-term exposure is very low. How to Protect Yourself from Asbestos Exposure. To protect yourself from asbestos exposure, be aware of what products used to be manufactured …
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People can be exposed to asbestos mainly by: Inhaling asbestos: Most exposures come from inhaling asbestos fibers in the air. This can occur in people mining or processing …
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The relationship between asbestos exposure and disease has been well documented, although questions persist as to variation in risk by the type and length of fiber. For a series of jobs with potential asbestos exposure, the primary fiber type (e.g., amosite, anthophylite, chrysotile, crocidolite, or tremolite) and fiber length were identified ...
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The association between asbestos exposure and COPD persisted in the multi-exposure model, although the magnitude of the estimate increased moderately in the multi-exposure model (PR: 1.55; 95%CI: 1.08, 2.22) compared to the single-exposure model. ... An immediate workplace surveillance program must be initiated to …
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The understanding by industrial hygienists of the hazards of asbestos and appropriate ways to characterize and control exposure has evolved over the years.
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However, a more specific measurement of asbestos characteristics in the lung tissue may be appropriate. We aimed to investigate the asbestos burden and characterize asbestos fibers in patients with lung cancer and ultimately assess the relationship between occupational and environmental asbestos exposure and lung …
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Further, talc-based cosmetics may be an overlooked and difficult to characterize source of exposure to asbestos, a known carcinogen. Keywords: Asbestos, talc, personal care products, cancer risk. Talc is a mineral ingredient that has been used in personal care products for decades. The mineral can be used to improve the texture and …
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Nonoccupational exposure to asbestos can be grouped into three main categories: paraoccupational (familial), neighborhood, and true environmental exposures. ... Further research is needed to characterize the contribution and risk profile for environmental asbestos and mesothelioma, and for the development of public health policy.
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Occupational asbestos exposure is most often reported in men working in industries such as construction and manufacturing; however, women are also at risk for exposure to asbestos fibers, and limited data exist on longer-term trends in mesothelioma deaths among women. ... To characterize deaths associated with mesothelioma and …
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A fact sheet about asbestos, the health hazards of asbestos exposure (including mesothelioma), and who's at risk for an asbestos-related disease. Also presented are resources for information related to asbestos exposure and programs to help exposed …
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T)alc-based cosmetics may be an overlooked and difficult to characterize source of exposure to asbestos, a known carcinogen." Appliances. Up until the 1980s, asbestos was used in some appliances as gaskets, insulation, or fire-proofing. If the asbestos products remained intact, it shouldn't be a problem.
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The corresponding p-values for the smoking interaction terms with 'ever', 'highest attained' and 'duration' asbestos exposure were 0.33, 0.77, and 0.88, respectively. Stratified analyses of highest attained asbestos exposure across cigarette pack years categories are presented in Table 3. There was an approximate two-fold …
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Short-term asbestos exposure is categorized as lasting less than a few days. Learn whether there are risks involved with one-time exposure to asbestos.
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A comment period for the public to provide input on the draft of part two of EPA's asbestos risk evaluation is open until June 17, 2024. The agency specifically encourages feedback related to take-home exposure scenarios, non-cancer endpoints used to characterize risk, and its draft single risk determination for asbestos.
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Preliminary evidence linking asbestos exposure to increased risk of kidney cancer emerged in the late 1970s; however, ... Using these exposure estimates for each job, we constructed three metrics to characterize occupational exposure to asbestos: (1) ever/never exposed, (2) highest attained intensity of exposure (high, medium, low), and …
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The understanding by industrial hygienists of the hazards of asbestos and appropriate ways to characterize and control exposure has evolved over the years. Here, a detailed analysis of the evolution of industrial hygiene practices regarding asbestos and its health risks, from the early 1900s until t …
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Exposure to asbestos may lead to renal cell carcinoma, the most common type of kidney cancer, an Italian study shows. The link to kidney cancer adds to the horrific history of asbestos, a substance definitively recognized as a cause of mesothelioma, lung cancer and a variety of other respiratory illnesses.. In the past, a …
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PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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