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  • NIOSH
    Pharmaceutical Considerations in the Use of Tetrandrine to Treat Silicosis

    By Ann Hubbs, Vincent Castranova, Jane Y. C. Ma, De-Hwa Chao, Joseph K. H. Ma

    AN OVERVIEW OF THE ACTION OF TETRANDRINE ON SILICOSISBecause of the persistent presence of silica dust in the lungs silicosis is a progressive and irreversible disease. At present, there is no proven

    Jan 1, 1998

  • NIOSH
    Photoacoustic Spectroscopy of Quartz: Chopping Frequency Dependence, Saturation Phenomenon and Quantitative Analysis

    By L. Cheng, M. S. Seehra, P. S. Raghoottama

    The four major IR bands of a-quartz at 1080, 797, 693 and 488 cm-1 are studied at room temperature by FTIR-Photoacoustic Spectroscopy. Using Rosencwaig-Gersho theory, equations for the PAS signal q fo

    Jan 1, 1989

  • NIOSH
    Physical and Surface Characterization for Mineral Processing

    By R. Hogg, S. Chander

    "An overview of various physical and interfacial characterization methods for use in mineral processing is presented in this paper. The availability of a large number of characterization techniques an

    Jan 1, 1989

  • NIOSH
    Physical Limitations and Musculoskeletal Complaints Associated With Work in Unusual or Restricted Postures: A Literature Review - Introduction.

    By Sean Gallagher

    The vast majority of ergonomics research has addressed the demands of work in standing or sitting postures, and understandably so. However, many workers (for example, underground miners, aircraft bagg

    Jan 1, 2005

  • NIOSH
    Physical Strength Assessment in Ergonomics - 1. Introduction

    By Sean Gallagher

    Humankind's interest in measurement of human physical strength probably dates to the first humans. At that time, life was truly a struggle in which the fittest survived. To a great extent, fittes

    Jan 1, 1998

  • NIOSH
    Physiological Responses And Subjective Discomfort Of Simulated Whole-Body Vibration From A Mobile Underground Mining Machine

    By Sean Gallagher, Thomas G. Bobick, Diane M. Doyle-Coombs, Richard L. Unger

    The U.S. Bureau of Mines has developed an in-house facility to evaluate selected effects of whole-body vibration (WBV) levels experienced by underground mobile equipment operators, Vertical vibration

  • NIOSH
    Pick-Point Drum Spray System Minimizes Longwall Shearer Operator's Respirable Dust Exposure - Objective

    Reduce longwall shearer operator's dust exposure by selecting the best drum water spray sys-tem for minimizing dust generated durinq cutting. Approach Three of the most commonly-used drum

    Jan 1, 1986

  • NIOSH
    Pillar Design Issues For Underground Stone Mines

    By A. T. Iannacchione

    Underground stone mining represents an emerging sector for the U.S. mining industry. As this expansion takes mines under deeper cover and as more efficient mining methods are utilized, adequate stone

  • NIOSH
    Pillar Mechanics Of Coal Mine Bursts: A Control Strategy

    By Joseph C. Zelanko, Anthony T. Iannacchione

    One of the most difficult and longstanding engineering problems associated with coal mining is the catastrophic failure phenomenon known as coal mine bursts (known in the United States as bumps). For

  • NIOSH
    Pillar Stability Issues Based On A Survey Of Pillar Performance In Underground Limestone Mines

    By Dennis R. Dolinar, John L. Ellenberger, Gabriel S. Esterhuizen, Anthony T. Iannacchione

    A survey of pillar conditions was carried out at 21 operating limestone mines that use the room-and-pillar method. The surveyed pillars were all located in rock that was classified as “Good” to “Very

  • NIOSH
    Placer-Mining Methods And Costs In Alaska - Introduction

    By Norman L. Wimmler

    Active placer mining in Alaska began near Juneau in 1880, but the first gold rush did not start until 1896; then the discovery of the Klondike brought gold seekers from all parts of the world. A few o

    Jan 1, 1927

  • NIOSH
    Plastic And Swelling Properties Of Bituminous Coking Coals - Introduction

    By R. E. Brewer

    A critical review of the numerous test methods that have been devised for measuring the "plastic" and "swelling" properties of bituminous coking coals and the practical evaluation of the data obtained

    Jan 1, 1942

  • NIOSH
    Pneumatic Active Suspension Design For Heavy Vehicle Seats And Operator Ride Comfort - Introduction

    By Alan Mayton, Bertrand Valero, Farid Amirouche

    Handling of heavy vehicles such as tractors, trucks and buses require a large roll stiffness which causes large high accelerations at the seat level during impacts. To provide comfort and minimize the

    Jan 6, 2006

  • NIOSH
    Pneumatic Concentration Of Mica ? Objective

    To concentrate coarse mica particles using a dry beneficiation technique. Approach Concentrate coarse, II berated mica particles using a Bureau-designed system of crushers, screens, and a two-

    Jan 1, 1981

  • NIOSH
    Pneumatic Monitoring Systems ? Objective

    To provide a flexible, low-maintenance, low-cost continuous mine air monitoring system as an alternative to conventional fixed-point, electronic monitoring systems. Background Continuous monitor

    Jan 1, 1988

  • NIOSH
    Pneumatic Wall-Locking Geophone System - Objective

    Develop an improved downhole geophone system with enhanced signal/noise ratio for collecting cross-hole seismic data used in tomographic reconstructions. Background The Bureau of Mines is conduc

    Jan 1, 1991

  • NIOSH
    Pollutant Levels in Underground Coal Mines using Diesel Equipment

    By Jr. Watts, B. K. Cantrell, D. H. Carlson, K. L. Rubow

    "Abstract — The use of diesel equipment in underground coal mines is controversial because the National Institute for Occupational Safety and Health (NIOSH ) regards ""wholediesel exhaust"" as ""a pot

    Mar 1, 1992

  • NIOSH
    Pollutant Levels in Underground Coal Mines Using Diesel Equipment (2f931383-ec7b-46a4-bb83-cfddedd0176a)

    By Jr. Watts, B. K. Cantrell, D. H. Carlson, K. L. Rubow

    "The use of diesel equipment in underground coal mines is controversial because ""whole diesel exhaust"" is regarded as ""a potential occupational carcinogen"" by the National Institute for Occupation

    Mar 1, 1992

  • NIOSH
    Pollutant Levels in Underground Coal Mines Using Diesel Equipment (407a8e8a-96a3-41c0-80ef-57ffb8fa601d)

    By Jr. Watts, B. K. Cantrell, D. H. Carlson, K. L. Rubow, S. T. Bagley

    "Permissible exposure limits (PELs) have been established for gaseous pollutants, carbon monoxide (CO), carbon dioxide (CO), nitric oxide (NO), nitrogen dioxide (NO2), and some gas-phase hydrocarbons

    Nov 1, 1995

  • NIOSH
    Pollution Prevention In Mining And Mineral Processing - Waste Assessments For Mines And Mills

    By Daniel S. Witkowsky

    The Pollution Prevention Act of 1990 provides few specifics to assist the non-fuel mining and mineral processing industries of the United States in achieving pollution prevention (P2) compliance. The

    Jan 1, 1995