Mostrando 4,361 - 4,380 Resultados de 77,560 Para Buscar '"AIR"', tiempo de consulta: 0.35s Limitar resultados
  1. 4361
    “…Reduced heart rate variability (HRV), a marker of poor cardiac autonomic function, has been associated with air pollution, especially fine particulate matter [< 2.5 μm in aerodynamic diameter (PM(2.5))]. …”
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  2. 4362
    “…BACKGROUND: Many epidemiological studies examining the relationships between adverse health outcomes and exposure to air pollutants use ambient air pollution measurements as a proxy for personal exposure levels. …”
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  3. 4363
    “…Our findings suggest that levels of air pollutants in Detroit, which are above the current National Ambient Air Quality Standards, adversely affect lung function of susceptible asthmatic children.…”
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  4. 4364
  5. 4365
    “…BACKGROUND: Ecologic studies are commonly used to report associations between short-term air pollution and mortality. In such studies, the unit of observation is the day rather than the individual. …”
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  6. 4366
    “…We examined the association of infant bronchiolitis with acute exposure to ambient air pollutants. DESIGN: We employed a time-stratified case–crossover method and based the exposure windows on a priori, biologically based hypotheses. …”
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  7. 4367
  8. 4368
    “…Air pollution measurements were conducted over a 1-year period in 24 North American communities participating in a respiratory health study. …”
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  9. 4369
    por Lipsett, M, Hurley, S, Ostro, B
    Publicado 1997
    “…During the winters of 1986-1987 through 1991-1992, rainfall throughout much of Northern California was subnormal, resulting in intermittent accumulation of air pollution, much of which was attributable to residential wood combustion (RWC). …”
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  10. 4370
    por Piver, W T
    Publicado 1975
    “…The methods proposed to meet the 1975 Standards of the Clean Air Act for mobile sources are alternative antiknocks, exhaust emission control devices, and alternative engine designs. …”
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  11. 4371
    “…BACKGROUND: Few assessments of the costs and benefits of reducing acute cardiorespiratory morbidity related to air pollution have employed a comprehensive, explicit approach to capturing the full societal value of reduced morbidity. …”
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  12. 4372
    “…The Clean Air Act requires that sensitive subgroups of exposed populations be protected from adverse health effects of air pollution exposure. …”
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  13. 4373
    por Lewtas, J
    Publicado 1993
    “…These emissions are characterized and compared to POM from automotive emissions (diesel and gasoline), woodstove emissions, residential oil furnace emissions, and ambient air particles. The tumor potency and estimated cancer risks for these POM mixtures ranges over nearly three orders of magnitude.…”
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  14. 4374
    por Wilcosky, T C
    Publicado 1993
    “…However, invasive markers, such as those measured in bronchoalveolar lavage fluid or lung specimens from autopsies, provide the most direct evidence of pulmonary damage from exposure to air pollutants. Unfortunately, the lack of basic information about marker properties (e.g., sensitivity, variability, statistical link with disease) currently precludes the effective use of most markers in studies of complex mixtures.…”
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  15. 4375
    “…A large number of studies have indicated associations between particulate air pollution and adverse health outcomes. Wintertime air pollution in particular has been associated with increased mortality. …”
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  16. 4376
    “…In this study, the objective was to evaluate the effects of ambient air pollution on respiratory symptoms and diseases of school children, in addition to considering indoor air pollution. …”
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  17. 4377
    “…Results indicate that PAH-induced DNA damage in mothers and newborns is increased by ambient air pollution. In the fetus, this damage appears to be enhanced by the CYP1A1 Mspl polymorphism.…”
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  18. 4378
    “…We studied 642 infants to determine the incidence of acute lower respiratory infection (ALRI) and its relationship to indoor air pollution due to fuel used for cooking (wood or kerosene). …”
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  19. 4379
    “…Occupational and toxicological studies have demonstrated adverse health effects from exposure to toxic air contaminants. Data on outdoor levels of toxic air contaminants have not been available for most communities in the United States, making it difficult to assess the potential for adverse human health effects from general population exposures. …”
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  20. 4380
    por Kodavanti, U P, Costa, D L, Bromberg, P A
    Publicado 1998
    “…The mechanisms by which increased mortality and morbidity occur in individuals with preexistent cardiopulmonary disease following acute episodes of air pollution are unknown. Studies involving air pollution effects on animal models of human cardiopulmonary diseases are both infrequent and difficult to interpret. …”
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