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Showing 47981 - 48000 of 82805 results
  • Reduced Interleukin8 Production by Cystic Fibrosis Airway Epithelial Cells
    Reduced Interleukin-8 Production by Cystic Fibrosis Airway Epithelial Cells
    Aronoff SC ;
    Cuff C
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The acquisition of Pseudomonas aeruginosa in the airways of patients with cystic fibrosis (CF) is the initial event leading to bronchiectasis and lung disease. Although the host factors that permit initial airway colonization are largely unknown, recent studies suggest that secretion of interleukin (IL)-8 by airway epithelia and local recruitment o ...
    Public Domain
  • A MultiZone Model Evaluation of the Efficacy of UpperRoom Air Ultraviolet Germicidal Irradiation
    A Multi-Zone Model Evaluation of the Efficacy of Upper-Room Air Ultraviolet Germicidal Irradiation
    Miller SL ;
    Nicas M
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Engineering controls can be used to reduce the spread of airborne infectious disease, particularly tuberculosis (TB), in high-risk settings. This article evaluates published data on the efficacy of upper-room air ultraviolet germicidal irradiation (UVGI). A three-zone representation of a TB patient room equipped with a germicidal UV lamp is develop ...
  • Cooperativity Between Oxidants and Tumor Necrosis Factor in the Activation of Nuclear Factor NFkappaB Requirement of RasMitogenActivated Protein Kinases in the Activation of NFkappaB by Oxidants
    Cooperativity Between Oxidants and Tumor Necrosis Factor in the Activation of Nuclear Factor (NF)-kappaB: Requirement of Ras/Mitogen-Activated Protein Kinases in the Activation of NF-kappaB by Oxidants
    Janssen-Heininger YM ;
    Macara I
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The transcription factor nuclear factor (NF)-kappaB is activated by oxidative stress or cytokines and is critical to the activation of inflammatory genes. Here, we report that hydrogen peroxide or 3-morpholinosydnonimine, which simultaneously releases nitric oxide and superoxide, synergize with the cytokine tumor necrosis factor (TNF)-alpha to acti ...
  • Agricultural Injury in Kentucky
    Agricultural Injury in Kentucky
    McClanahan K ;
    Scheerer A
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Active surveillance of agricultural injuries in six Kentucky counties continues as part of the Community partners for Health Farming (CPHF) Project. The counties are in two regions: Barren River (Barren and Warren) and Buffalo Trace/Gateway (Bracken, Fleming, Mason and Rowan ). The Occupational Health Nurses in Agricultural Communities, which colle ...
  • Effect of ThreeWinding Transformer Models on the Analysis and Protection of Mine Power Systems
    Effect of Three-Winding Transformer Models on the Analysis and Protection of Mine Power Systems
    Kohler, Jeffrey L. ;
    Oommen, Mathew P.
    1999/05/01 | Mining Publications
    Computer-aided loadflow and fault analyses of mine power systems are routinely conducted to ascertain system performance and also to provide information to assist in the protection and coordination of these systems. Three-winding transformers are frequently encountered in mining applications, typically at continuous miner and longwall sections wher ...
    Public Domain
  • Osmotic Regulation of Airway Reactivity by Epithelium
    Osmotic Regulation of Airway Reactivity by Epithelium
    Chang VC ;
    Cutler D
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Inhalation of nonisotonic solutions can elicit pulmonary obstruction in asthmatic airways. We evaluated the hypothesis that the respiratory epithelium is involved in responses of the airways to nonisotonic solutions using the guinea pig isolated, perfused trachea preparation to restrict applied agents to the mucosal (intraluminal) or serosal (extra ...
    Public Domain
  • Computer Motion Simulation for Sagittal Plane Lifting Activities
    Computer Motion Simulation for Sagittal Plane Lifting Activities
    Ayoub MM ;
    Bernard TM
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    In ergonomics, the biomechanical approach provides estimation of various mechanical stresses acting on the body while a person manually handles an object. Although motion analysis systems are available for dynamic biomechanical analyses, the use of such systems are mostly performed in laboratory due to high cost of the equipment and the expertise r ...
  • University Of New South Wales Coal Pillar Strength Determinations For Australian And South African Mining Conditions Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    University Of New South Wales Coal Pillar Strength Determinations For Australian And South African Mining Conditions; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Galvin, Jim M., PH.D. ;
    Hebblewhite, Bruce K., PH.D.
    5/1/1999 | National Institute for Occupational Safety and Health (NIOSH)
    A series of mine design accidents in the late 1980s resulted in a major research program at the University of New South Wales, Australia, aimed at developing pillar and mine design guidelines. A database of both failed and unfailed Australian underground coal mine pillar case studies was compiled. A procedure was developed to enable the effective w ...
    Public Domain
  • Changes in Smooth Muscle Tone During Osmotic Challenge in Relation to Epithelial Bioelectric Events in Guinea Pig Isolated Trachea
    Changes in Smooth Muscle Tone During Osmotic Challenge in Relation to Epithelial Bioelectric Events in Guinea Pig Isolated Trachea
    Dortch-Carnes J ;
    Fedan, Jeffery S.
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The relationship between epithelial bioelectric events and epithelium-dependent relaxant and contractile responses of airway smooth muscle in response to hyperosmolar and hypo-osmolar solutions was investigated in guinea pig isolated trachea. Tracheae were perfused with normal or nonisosmotic modified Krebs-Henseleit solution while simultaneously m ...
    Public Domain
  • Performance of Rat Plantar Flexor Muscles by Active Stretching During Ankle Rotations and Isometric Contractions
    Performance of Rat Plantar Flexor Muscles by Active Stretching During Ankle Rotations and Isometric Contractions
    Stauber WT ;
    Willems ME
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The performance of rat plantar flexor muscles by repeated stretches (30) using velocity-controlled ankle rotations from 1.57 to 0.70 rad (0.87 rad s-1: slow stretch, 10.47 rad s-1: fast stretch) and repeated isometric contractions (30) at 1.13 rad was examined. Performance was assessed by the isometric force at ankle positions of 1.57 and 0.70 rad ...
  • Evaluation of a Biomechanical Simulation Model for Sagittal Plane Lifting
    Evaluation of a Biomechanical Simulation Model for Sagittal Plane Lifting
    Ayoub MM ;
    Bernard TM
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The kinetics and kinematics produced by a computerized dynamic biomechanical simulation model were examined and compared to those produced by actual human lifters. The purpose of the comparison was to demonstrate the accuracy of the simulation in predicting stresses imposed on the human body during the performance of a lifting task. The simulation ...
  • Coal Pillar Design For Longwall Gate Entries Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Coal Pillar Design For Longwall Gate Entries; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Cassie, John W. ;
    Altounyan, Peter F. R., PH.D.
    5/1/1999 | National Institute for Occupational Safety and Health (NIOSH)
    This paper describes measured data on strata behavior obtained in recent years from sites in the United Kingdom and the implications for pillar design. The data include results from overcoring stress measurements adjacent to coal mine roadways and deformation monitoring related to longwall extraction. The stresses adjacent to mine roadways or entri ...
    Public Domain
  • Preventing Hearing Loss Among Miners
    Preventing Hearing Loss Among Miners
    Rider, James P.
    1999/05/01 | Mining Publications
    Overexposure to noise continues to be a widespread serious health hazard in the U.S. mining industry. The use of heavy equipment, the drilling of rock, and a confined work environment are just a few of the factors that contribute to high levels of noise exposure. Prolonged exposure to hazardous noise levels over a period of several years -- with no ...
    Public Domain
  • Glove Permeation Tests Using Novel Microchemical Techniques for 2 4Dichlorophenoxyacetic Acid 24D Derivatives
    Glove Permeation Tests Using Novel Microchemical Techniques for 2, 4-Dichlorophenoxyacetic Acid (2,4-D) Derivatives
    Lin Y-W ;
    Que Hee SS
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    The aim was to assess the permeation of different herbicide emulsion concentrate formulations of 2,4-dichlorophenoxyacetic acid (2,4-D) as 60.8 and 83.5% butoxyethyl ester (BEE) and 46.8% dimethyl amine salt (DMAS) through four types of glove materials (lined unsupported nitrile, unlined unsupported butyl, Silver Shield laminate, and Viton). This e ...
  • Coal Pillar Strength And Practical Coal Pillar Design Considerations Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Coal Pillar Strength And Practical Coal Pillar Design Considerations; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Su, Daniel W. H., PH.D. ;
    Hasenfus, Gregory J.
    5/1/1999 | National Institute for Occupational Safety and Health (NIOSH)
    This paper demonstrates that finite-element modeling can be used to predict in situ coal pillar strength, especially under non ideal conditions where interface friction and roof and floor deformation are the primary controlling factors. Despite their differences in approach, empirical, analytical, and numerical pillar design methods have apparently ...
    Public Domain
  • Health Hazard Evaluation Report HETA 9701122738 HandiShop Inc Mexico Missouri
    Health Hazard Evaluation Report: HETA 97–0112–2738: Handi–Shop, Inc., Mexico, Missouri
    Lenhart, Steven W.
    1999/05/01 | Health Hazard Evaluation Reports (HHE)
    The National Institute for Occupational Safety and Health (NIOSH) received a confidential request for a health hazard evaluation (HHE) at Handi-Shop, Inc. in Mexico, Missouri. the HHE requester was concerned that health risks may have been associated with dust exposures of workers who packaged 'NVX, STPP, and forta fiber' and noted 'there may be ot ...
    Public Domain
  • Characterization of Gas Flow in Longwall Gobs Pittsburgh Coalbed PA
    Characterization of Gas Flow in Longwall Gobs: Pittsburgh Coalbed, PA
    Diamond, William P. ;
    Garcia F
    1999/05/01 | Mining Publications
    The National Institute for Occupational Safety and Health, Office for Mine Safety and Health Research is investigating the geologic and mining factors influencing the migration of longwall gob gas. One goal of these studies is to optimize methane drainage strategies to reduce the volume of gob gas that reaches the underground workplace. As part of ...
    Public Domain
  • NIOSH Special Hazard Review Identifying HighRisk Small Business Industries The Basis for Preventing Occupational Injury Illness and Fatality
    NIOSH Special Hazard Review: Identifying High-Risk Small Business Industries: The Basis for Preventing Occupational Injury, Illness, and Fatality
    Lentz, Thomas J. ;
    Okun, Andrea H.
    1999/05/01 | NIOSH Numbered Publications
    More than half of the U.S. workforce is employed in business establishments with fewer than 100 employees. Prevention of occupational illness and injury is often difficult in these small business establishments because they have few safety and health resources, cannot usually hire staff devoted to safety and health activities, and often lack the ab ...
    Public Domain
  • The Control of Press Cleaning Solvent Vapors in a Small Lithographic Printing Establishment
    The Control of Press Cleaning Solvent Vapors in a Small Lithographic Printing Establishment
    Crouch, Keith G. ;
    Gressel, Michael G.
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Small businesses frequently have inadequate in-house expertise to solve a variety of safety and health problems. The National Institute for Occupational Safety and Health (NIOSH) has therefore conducted a demonstration project in the commercial lithographic printing industry, which consists largely of small companies, in an effort to establish suit ...
    Public Domain
  • Evaluation of a Portable XRay Fluorescence Instrument for the Determination of Lead in Workplace Air Samples
    Evaluation of a Portable X-Ray Fluorescence Instrument for the Determination of Lead in Workplace Air Samples
    Ashley, Kevin E. ;
    Clark CS
    1999/05/01 | National Institute for Occupational Safety and Health (NIOSH)
    Occupational Safety and Health Administration (OSHA) regulations for worker exposure to lead specify worker protection levels based upon airborne concentrations of lead dust. The rapid, on-site determination of lead in air filter samples using a portable x-ray fluorescence (XRF) instrument with an attachment to hold the filter would expedite the ex ...
    Public Domain
47981 - 48000 / 82805