• coal
  • Particle sizing by laser diffraction provides a prospective method for real-time detection of weight and size information of coal mine dust. (spie.org)
  • Quickness, accuracy and ability to measure total and respirable dust weighs are some of the basic requirements for inversion method of the coal mine dust transducer. (spie.org)
  • Matrix Body PDC Bits, 6' PDC Drill Bit, Flat Top PDC Drill Bit manufacturer / supplier in China, offering 6' PDC Drill Bit Coal Mining PDC Drill Bit PDC Drill Bit for Coal Mine, High Grade Aq, Nq, Hq, Pq, Bq Drilling Pipes, 66mm PDC Non-Coring Bit and so on. (made-in-china.com)
  • Respirable particles of high-percentage silica content from anthracite and bituminous coal mine dust samples were analyzed for aluminosilicate clay surface coating, by measuring silicon and aluminum X-ray spectra using scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDS). (mst.edu)
  • Some 20 respirable-sized, non-agglomerated particles with silicon fraction of signal of 75% or more (for elements above sodium) were analyzed for each of 12 coal mine dust samples. (mst.edu)
  • Mine dust samples were from U.S. anthracite and bituminous coal mining regions involved in epidemiological studies of the U.S. National Study of Coal Workers' Pneumoconiosis. (mst.edu)
  • Surface Composition of Respirable Silica Particles in a Set of U.S. Anthracite and Bituminous Coal Mine Dusts," Journal of Aerosol Science , Elsevier, Jan 1997. (mst.edu)
  • Does coal mine dust present a risk for lung cancer. (cdc.gov)
  • A 1 to 1 matched case analysis, matching age at death, was employed to examine the lung cancer risk of coal mine dust exposure and cigarette smoking status. (cdc.gov)
  • A 2 to 1 matched case analysis, matching age at death and smoking status, was employed to examine the lung cancer risk of coal mine dust exposure independent of cigarette smoking. (cdc.gov)
  • Extensive coal mine dust exposure from underground mining for 25 or more years gave an odds ratio of 0.89 for risk of lung cancer mortality. (cdc.gov)
  • There is no evidence that coal mine dust exposure by itself or in interaction with cigarette smoking results in increased lung cancer mortality. (cdc.gov)
  • Over 100 people were arrested outside the White House on Monday in a protest calling for the abolition of mountaintop removal coal mining. (democracynow.org)