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Showing 48001 - 48020 of 82805 results
  • Experience With The BoundaryElement Method Of Numerical Modeling To Resolve Complex Ground Control Problems Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Experience With The Boundary-Element Method Of Numerical Modeling To Resolve Complex Ground Control Problems; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Karabin, George J. ;
    Evanto, Michael A.
    5/1/1999 | National Institute for Occupational Safety and Health (NIOSH)
    The Mine Safety and Health Administration, Pittsburgh Safety and Health Technology Center, Roof Control Division, is routinely involved in the evaluation of ground conditions in underground coal mines. Assessing the stability of mined areas and the compatibility of mining plans with existing conditions is essential to ensuring a safe working enviro ...
    Public Domain
  • Performance Evaluation of a Fiber Length Classifier
    Performance Evaluation of a Fiber Length Classifier
    Baron, Paul A. ;
    Deye GJ
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    A performance evaluation was conducted on a differential mobility classifier that separates fibers according to length using dielectrophoresis. The classifier had been constructed and used for several applications in previous studies. The performance of the classifier was predicted using a two-dimensional axisymmetric model of the flow field and th ...
    Public Domain
  • Health Hazard Evaluation Report HETA 9802172772 Planta de Filtraccin Sergio Cuevas Bustamante Autoridad de Acueducto y Alcantarillados de Puerto Rico Frujillo Alto Puerto Rico
    Health Hazard Evaluation Report: HETA 98–0217–2772: Planta de Filtracción Sergio Cuevas Bustamante, Autoridad de Acueducto y Alcantarillados de Puerto Rico, Frujillo Alto, Puerto Rico
    Ewers, Lynda M. ;
    Lopez, Ali
    1999/05/01 | Health Hazard Evaluation Reports (HHE)
    El 6 de mayo de 1998, la División de Evaluación de Riesgos para la Salud (HHE) del Instituto Nacional para la Salud y Seguridad Ocupacional (NIOSH) recibió una petición confidencial de los empleados de la Planta de Filtración Sergio Cuevas Bustamante de la Autoridad de Acueducto y Alcantarillado de Puerto Rico. Los peticionarios expresaron su preoc ...
    Public Domain
  • VanadateInduced Activation of Activator Protein1 Role of Reactive Oxygen Species
    Vanadate-Induced Activation of Activator Protein-1: Role of Reactive Oxygen Species
    Castranova, Vincent ;
    Colbunr NH
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The present study was undertaken to test the hypothesis that the toxicity and carcinogenicity of vanadium might arise from elevation of reactive oxygen species leading to activation of the transcription factor activator protein-1 (AP-1). The AP-1 transactivation response has been implicated as causal in transformation responses to phorbol esters an ...
    Public Domain
  • Survival of bacteria on respirator filters
    Survival of bacteria on respirator filters
    Grinshpun SA ;
    Reponen T
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The survival and potential growth of two different kinds of bacteria were investigated on NIOSH-certified polypropylene respirator filters. Bacillus subtilis var niger (B. subtilis) spores represented environmentally resistant bacteria, whereas Pseudomonas fluorescens (P. fluorescens) vegetative cells represented stress-sensitive bacteria. The bact ...
  • Diagnostic Performance of Food and Drug AdministrationCleared Serologic Assays for Natural Rubber LatexSpecific IgE Antibody The MultiCenter Latex Skin Testing Study Task Force
    Diagnostic Performance of Food and Drug Administration-Cleared Serologic Assays for Natural Rubber Latex-Specific IgE Antibody. The Multi-Center Latex Skin Testing Study Task Force
    Biagini, Raymond E. ;
    Hamilton, Robert G.
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    BACKGROUND: In the absence of Food and Drug Administration-approved natural rubber latex skin testing reagents, latex-specific IgE antibody immunoassays are used in the diagnosis of latex allergy. Comparative diagnostic performance of these tests has not been definitively determined. OBJECTIVE: We sought to study the predictive value of available F ...
    Public Domain
  • Proficiency Analytical Testing PAT Program May 1999
    Proficiency Analytical Testing (PAT) Program (May 1999)
    Feng, H. Amy ;
    Schlech P
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    PAT round 137 April 1999. A,total of 1169 laboratories were enrolled in the PAT Program with 1048 laboratories submitting results on Round 137. Of the 1048 laboratories submitting results, 949 used the Internet data entry system. Table I lists the reference values, performance limits, and participants for each sample type in the PAT Program. Table ...
    Public Domain
  • Health Hazard Evaluation Report HETA 9802172768 Puerto Rico Aqueduct and Sewer Authority Sergio Cuevas Bustamante Filtration Plant Frujillo Alto Puerto Rico
    Health Hazard Evaluation Report: HETA 98-0217-2768: Puerto Rico Aqueduct and Sewer Authority, Sergio Cuevas Bustamante Filtration Plant, Frujillo Alto, Puerto Rico
    Ewers, Lynda M. ;
    Lopez, Ali
    1999/05/01 | Health Hazard Evaluation Reports (HHE)
    On May 6, 1998, the National Institute for Occupational Safety and Health (NIOSH) received a confidential employee request for a Health Hazard Evaluation (HHE) at the Sergio Cuevas Bustamante Filtration Plant of the Puerto Rico Aqueduct and Sewer Authority. The requesters expressed concern regarding respiratory problems and dermatitis possibly asso ...
    Public Domain
  • National Occupational Research Agenda Update May 1999 21 Priorities for the 21st Century
    National Occupational Research Agenda Update, May 1999: 21 Priorities for the 21st Century
    National Institute for Occupational Safety and Health
    1999/05/01 | NIOSH Numbered Publications
    Evidence of the continued success of the National Occupational Research Agenda (NORA) can be found in this third annual NORA Update. Funding and support of NORA, both intramurally and extramurally, increase yearly. The NORA grants program has also been a huge success. In FY 98, NIOSH and four NIH partners awarded 50 grants totaling about $8 million ...
    Public Domain
  • Characterization of Gas Flow in Longwall Gobs Pittsburgh Coalbed PA
    Characterization of Gas Flow in Longwall Gobs: Pittsburgh Coalbed, PA
    05/01/1999 | NIOSH
    Investigation of the geologic and mining factors influencing the migration of longwall gob gas with a goal to optimize methane drainage strategies to reduce the volume of gob gas that reaches the underground workplace.
    Public Domain
  • TertButyl HydroperoxideHemoglobinInduced Oxidative Stress and Damage to Vascular Smooth Muscle Cells Different Effects of Nitric Oxide and Nitrosothiols
    Tert-Butyl Hydroperoxide/Hemoglobin-Induced Oxidative Stress and Damage to Vascular Smooth Muscle Cells: Different Effects of Nitric Oxide and Nitrosothiols
    Castranova, Vincent ;
    Gandley R
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The goal of the present work was to determine whether nitric oxide (NO) released from different donors (NONOates and nitrosothiols) can act as a protective antioxidant against oxidative stress and cytotoxicity induced by extracellular hemoglobin/tert-butyl hydroperoxide (Hb/tert-BuOOH) in vascular smooth muscle cells (VSMCs). No changes in phosphol ...
    Public Domain
  • In Situ Microscopic Analysis of Asbestos and Synthetic Vitreous Fibers Retained in Hamster Lungs Following Inhalation
    In Situ Microscopic Analysis of Asbestos and Synthetic Vitreous Fibers Retained in Hamster Lungs Following Inhalation
    Antonini JM ;
    Brain JD
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Hamsters breathed, nose-only, for 13 weeks, 5 days/week, 6 hr/day, either man-made vitreous fiber (MMVF)10a, MMVF33, or long amosite asbestos at approximately 300 World Health Organization (WHO) fibers/cc or long amosite at 25 WHO fibers/cc. [World Health Organization fibers are longer than 5 µm and thicker than 3 µm, with aspect ratio >3.] After s ...
  • Experience Of Field Measurement And Computer Simulation Methods For Pillar Design Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Experience Of Field Measurement And Computer Simulation Methods For Pillar Design; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Gale, Winton J., PH.D.
    5/1/1999 | National Institute for Occupational Safety and Health (NIOSH)
    Coal pillar design has been based on generalized formulas of the strength of the coal in a pillar and experience in localized situations. Stress measurements above and in coal pillars indicate that the actual strength and deformation of pillars vary much more than predicted by formulas. This variation is due to failure of strata surrounding coal. T ...
    Public Domain
  • Controlling the Ergonomic Hazards of Wiring Tasks for Household Appliances
    Controlling the Ergonomic Hazards of Wiring Tasks for Household Appliances
    National Institute for Occupational Safety and Health
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Employees who perform repetitive wiring tasks on assembly lines may be at risk of developing carpal tunnel syndrome and other musculoskeletal disorders of the hand, wrist, and arm. Because 88 percent of household appliances are electrically powered, many workers assembling household appliances perform wiring operations. Some workers attach up to fi ...
    Public Domain
  • A Fiber Characterization of the Natural Zeolite Mordenite A Potential Inhalation Health Hazard
    A Fiber Characterization of the Natural Zeolite, Mordenite: A Potential Inhalation Health Hazard
    Buchan RM ;
    Dakins ME
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Interest in mordenite as an inhalation hazard arose when it was discovered that the mineral exists in the subsurface of Yucca Mountain, NV, the site of a federally proposed nuclear waste repository. During preliminary geologic investigations at Yucca Mountain, workers performing air coring (dry-drilling) operations were potentially exposed to aeros ...
  • An Estimate of Prostate Cancer Prevalence for a Demographically Similar Workforce Population
    An Estimate of Prostate Cancer Prevalence for a Demographically Similar Workforce Population
    Ducatman AM ;
    Hobbs GR
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    To obtain an estimate of prostate cancer prevalence when screening is applied to a workforce, we conducted a search of the English world literature from West Virginia University. Thirty-one papers which met selection criteria for screening were followed by histopathologic diagnosis. Publications using Prostate Specific Antigen (PSA) as a screening ...
  • Factors Contributing to the Acute and Subchronic Adverse Respiratory Effects of Machining Fluid Aerosols in Guinea Pigs
    Factors Contributing to the Acute and Subchronic Adverse Respiratory Effects of Machining Fluid Aerosols in Guinea Pigs
    Galdanes K ;
    Gordon T
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Several physical, chemical, and microbial factors are potential contributors to the adverse pulmonary effects associated with occupational exposure to machining fluid aerosols. The present study examined the relative toxicity of 3 major classes of machining fluids (soluble, semi-synthetic, and synthetic) as well as that of unused (fresh) versus use ...
  • New Strength Formula For Coal Pillars In South Africa Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    New Strength Formula For Coal Pillars In South Africa; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    van der Merwe, J. Nielen, PH.D.
    5/1/1999 | National Institute for Occupational Safety and Health (NIOSH)
    For the last 3 decades, coal pillars in the Republic of South Africa have been designed using the well-known strength formula of Salamon and Munro that was empirically derived after the Coalbrook disaster. The database was recently updated with the addition of failures that occurred after the initial analysis and the omission of failures that occur ...
    Public Domain
  • The West Virginia Occupational Safety and Health Initiative Practicum Training for a New Marketplace
    The West Virginia Occupational Safety and Health Initiative: Practicum Training for a New Marketplace
    Becker PE ;
    Ducatman AM
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Occupational medicine practice has experienced a shift from larger corporate medical departments to organizations providing services for a variety of industries. Specific training needs will accompany this shift in practice patterns; these may differ from those developed in the traditional industrial or corporate medical department setting. The Wes ...
  • Cohort Mortality Study of 57000 Painters and Union Members A 15 Year Update
    Cohort Mortality Study of 57,000 Painters and Union Members: A 15 Year Update
    Palu S ;
    Steenland, Kyle
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    To study mortality patterns in the largest existing cohort of painters. 15 years of follow up were added to a study of 42,170 painters and 14,316 non-painters based on union records. There were 23,458 deaths, compared with 5313 in the earlier follow up. Comparisons with the United States population showed significantly increased rates in painters f ...
    Public Domain
48001 - 48020 / 82805