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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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