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Showing 46661 - 46680 of 82805 results
  • Health Hazard Evaluation Report HETA 9800112801 Woodbridge Corporation Brodhead Wisconsin
    Health Hazard Evaluation Report: HETA 98-0011-2801: Woodbridge Corporation, Brodhead, Wisconsin
    Daftarian, Helga S. ;
    Reh, Christopher M.
    2000/07/01 | Health Hazard Evaluation Reports (HHE)
    On October 14, 1997, the National Institute for Occupational Safety and Health (NIOSH) received a Health Hazard Evaluation (HHE) request from the Union of Needle trades, Industrial and Textile Employees (UNITE!) Local 1871 on behalf of employees at the Woodbridge Corporation in Brodhead, Wisconsin. The request indicated that five Woodbridge employe ...
    Public Domain
  • Mechanisms of Arsenic Carcinogenicity Genetic or Epigenetic Mechanisms
    Mechanisms of Arsenic Carcinogenicity: Genetic or Epigenetic Mechanisms?
    Luster MI ;
    Simeonova PP
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Environmental and occupational exposure to arsenic is associated with increased risk of skin, urinary bladder, and respiratory tract cancers. The mechanisms responsible for arsenic carcinogenesis have not been established. Arsenic does not act through classic genotoxic and mutagenic mechanisms, as do other metals such as cadmium or chromium. Increa ...
    Public Domain
  • Occupational Bladder Cancer Mortality Among Racial and Ethnic Minorities in 21 States
    Occupational Bladder Cancer Mortality Among Racial and Ethnic Minorities in 21 States
    Loomis D ;
    Schulz MR
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    BACKGROUND: Occupational bladder cancer mortality among minority racial/ethnic groups is not well described compared to occupational bladder cancer mortality among non-minority males in the United States. METHODS: Race/ethnicity- and sex-specific bladder cancer mortality (1985-1992) of workers employed in 21 states was examined using a proportionat ...
  • Performance of Plantar Flexor Muscles with Eccentric and Isometric Contractions in Intact Rats
    Performance of Plantar Flexor Muscles with Eccentric and Isometric Contractions in Intact Rats
    Stauber WT ;
    Willems MET
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    To examine the changes in performance of active plantar flexor muscles of rats by controlled dorsiflexion (i.e., stretching of muscles) at two angular velocities. Repeated stretches (30) at two velocities of ankle rotation [slow stretch (0.87 rads x s(-1) (i.e., 50 degrees x (s-1))), fast stretch (10.47 rad x s(-1) (i.e., 600 degrees x s-1))] were ...
  • Effects of Various Treatments on the Quantitative Recovery of Endotoxin from WaterSoluble Metalworking Fluids
    Effects of Various Treatments on the Quantitative Recovery of Endotoxin from Water-Soluble Metalworking Fluids
    Brown, Mary E. ;
    Feng, H. Amy
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Three extraction methods were compared for their effectiveness in the quantitative removal of endotoxin from unused and used bulk water-soluble metalworking fluid (MWF) samples. Soluble, synthetic, and semisynthetic fluids were studied. The three modes of extraction consisted of (1) pyrogen-free water (PFW); (2) PFW and Tween 20 (polyoxyethylene so ...
    Public Domain
  • Development of a Versatile Method for the Detection of Nicotine in Air
    Development of a Versatile Method for the Detection of Nicotine in Air
    Jaycox, Larry B. ;
    Krake, Ann M.
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Nicotine, a rapid-acting poison, is present in environmental tobacco smoke and has been used as a greenhouse insecticide. Due to its toxicity, several health hazard evaluations (HHE) have resulted from potential nicotine exposures to casino workers, airline flight attendants, and greenhouse employees. Exposure to nicotine can occur by inhalation, s ...
    Public Domain
  • Ergonomic Evaluation of Antenatal Ultrasound Testing Procedures
    Ergonomic Evaluation of Antenatal Ultrasound Testing Procedures
    Baron, Sherry L. ;
    Habes, Daniel J.
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    On February 1, 1999, the National Institute for Occupational Safety and Health (NIOSH) received a request for a health hazard evaluation (HHE) from the safety manager of a university of medicine and dentistry. The request stated that ultrasound technologists at one of the university's antenatal testing units were experiencing neck, shoulder, and ar ...
    Public Domain
  • Manganese Dioxide Exposures and Respirator Performance at an Alkaline Battery Plant
    Manganese Dioxide Exposures and Respirator Performance at an Alkaline Battery Plant
    Hanley, Kevin W. ;
    Lenhart, Steven W.
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Two industrial hygiene studies were conducted at an alkaline battery plant to evaluate worker exposures to manganese dioxide particulate and the effectiveness of filtering facepiece respirators. The work areas studied included the plant's powder-processing tower and press rooms where manganese was blended, compacted with graphite, and inserted into ...
    Public Domain
  • Chemical and Thermal Effects on the Viability and Motility of Spermatozoa from the Turtle Epididymis
    Chemical and Thermal Effects on the Viability and Motility of Spermatozoa from the Turtle Epididymis
    Congdon JD ;
    Gist DH
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    The viability and motility of spermatozoa harvested from the epididymides of turtles were estimated to elucidate properties that might enable them to be stored over long periods of time. Spermatozoa from the painted turtle, Chrysemys picta, were analysed and compared with spermatozoa from two other turtles, Trachemys scripta and Sternotherus odorat ...
    Public Domain
  • Environmental Asbestos Exposure and Mesothelioma
    Environmental Asbestos Exposure and Mesothelioma
    Orenstein MR ;
    Schenker MB
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Epidemiologic studies of mesothelioma have focused primarily on occupational exposures to asbestos. Nonoccupational exposure to asbestos can be grouped into three main categories: paraoccupational (familial), neighborhood, and true environmental exposures. Elevated mesothelioma rates not attributable to occupational exposures have been observed in ...
  • Effects of Metal Working Fluids on B6C3F1 Mouse Skin
    Effects of Metal Working Fluids on B6C3F1 Mouse Skin
    Al-Humadi NH ;
    Battelli L
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Over 10 million workers in the United States are exposed to metal working fluids (MWFs) through dermal contact and/or inhalation of aerosolized fluids. The objective of this study was to elucidate the response of skin to dermal exposure to MWFs. Four- to six-week-old B6C3F1 mice of both sexes were divided into eight groups (n=5/group) and exposed t ...
    Public Domain
  • Chronic Dopaminergic Signaling in the Basal Ganglia A Damage Perspective on Kinases and FosRelated Antigens
    Chronic Dopaminergic Signaling in the Basal Ganglia: A Damage Perspective on Kinases and Fos-Related Antigens
    Miller DB ;
    O'Callaghan JP
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Specific protein phosphorylation pathways have been shown to play a role in cellular adaptation responses underlying addiction to psychostimulants such as methamphetamine and cocaine. Transcriptional regulation through fos-related antigens constitutes one element through which these dopaminergic agonists exert their persistent actions. In addition ...
    Public Domain
  • Markov Modeling of Contaminant Concentrations in Indoor Air
    Markov Modeling of Contaminant Concentrations in Indoor Air
    Nicas M
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Most models for contaminant dispersion in indoor air are deterministic and do not account for the probabilistic nature of the pollutant concentration at a given room position and time. Such variability can be important when estimating concentrations involving small numbers of contaminant particles. This article describes the use of probabilistic mo ...
  • Prior Exposure to a Behaviorally Sensitizing Regimen of DMethamphetamine Does Not Alter the Striatal Dopaminergic Damage Induced by a Neurotoxic Regimen
    Prior Exposure to a Behaviorally Sensitizing Regimen of D-Methamphetamine Does Not Alter the Striatal Dopaminergic Damage Induced by a Neurotoxic Regimen
    Johnson, Elizabeth A. ;
    Miller DB
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Repeated exposure to psychostimulant drugs such as d-methamphetamine (d-METH) and cocaine can be associated with extremely long-lived changes in dopamine systems at the behavioral, cellular and molecular level. Sensitization or an enhanced response to drug exposure is one such change. Investigations of these phenomena at the cellular and molecular ...
    Public Domain
  • Using Water Sprays to Improve Performance of a FloodedBed Dust Scrubber
    Using Water Sprays to Improve Performance of a Flooded-Bed Dust Scrubber
    Goodman G
    2000/07/01 | Mining Publications
    Supplemental water sprays were placed along the sides of a continuous mining machine to improve suppression and confinement of the dust cloud under the cutting boom to reduce downwind dust levels. Using a full-scale mock-up of a continuous mining machine, preliminary work showed that these side sprays improved suppression of the dust cloud and redi ...
    Public Domain
  • Deaths from External Causes of Injury Among Construction Workers in North Carolina 19881994
    Deaths from External Causes of Injury Among Construction Workers in North Carolina, 1988–1994
    Dement, John M. ;
    Lipscomb H
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    Records from the Office of the North Carolina Chief Medical Examiner were used to describe 3955 deaths, both on and off the job, between 1988 and 1994 from external causes of injury (E-codes) among individuals whose usual occupation was in the construction trades. For the calculation of rates, population sizes were estimated using 1980 and 1990 cen ...
  • Particulate Penetration of Porous Foam Used as a Low Flow Rate Respirable Dust Size Classifier
    Particulate Penetration of Porous Foam Used as a Low Flow Rate Respirable Dust Size Classifier
    Baron, Paul A. ;
    Deye GJ
    2000/07/01 | Mining Publications
    Porous foam has been used as a material for classification of particulate matter into various size fractions. The penetration characteristics of a nominal 90 pores per inch porous foam were studied at various flow rates, face velocities, and foam plug diameters and compared to the aerosol penetration of a 10 mm Dorr Oliver cyclone operated at 1.7 L ...
    Public Domain
  • Characterization of Cytochrome P450Dependent and Glutathione Transferase Activities in SV 40Immortalized Uroepithelial Cell Lines Possible Role in Transformation and Tumor Formation
    Characterization of Cytochrome P450-Dependent and Glutathione Transferase Activities in SV 40-Immortalized Uroepithelial Cell Lines: Possible Role in Transformation and Tumor Formation
    Frederickson SM ;
    Reznikoff CA
    2000/07/01 | National Institute for Occupational Safety and Health (NIOSH)
    An in vitro/in vivo transformation system has been developed as a model for bladder tumorigenesis. SV40-immortalized human uroepithelial cells are exposed to putative carcinogens and then implanted into athymic nude mice to testfortumorigenesis. Studies with 4-aminobiphenyl(4-ABP) demonstrated that one cell line, SV-HUC-PC, was sensitive to chemica ...
    Public Domain
  • Information Circular 9451 SelfContained SelfRescuer Field Evaluation SixthPhase Results
    Information Circular 9451: Self-Contained Self-Rescuer Field Evaluation: Sixth-Phase Results
    Kyriazi, Nicholas ;
    Shubilla, John P.
    2000/07/01 | Mining Publications
    NIOSH, Pittsburgh Research Laboratory, has undertaken a study to determine how well self-contained self-rescuers (SCSRs), deployed in accordance with Federal regulations (30 CFR 75.1714), hold up in the underground environment with regard to both physical damage and aging. This report presents findings regarding laboratory-tested SCSRs in the sixth ...
    Public Domain
  • Computer Modeling Of Catch Benches To Mitigate Rockfall Hazards In Open Pit Mines
    Computer Modeling Of Catch Benches To Mitigate Rockfall Hazards In Open Pit Mines
    Miller, Stanley M. ;
    Girard, Jami M.
    2000/07/01 | Mining Publications
    A computer analysis of bench stability has been developed to account for multiple occurrences of potential slope-failure modes in discontinuous rock masses. Bench-scale plane shears and tetrahedral wedges are simulated and stochastically analyzed to estimate the probability of retaining specified catch-bench widths. This geotechnical information is ...
    Multi-Language Public Domain
46661 - 46680 / 82805