caa a22 4500 397503547 CHVBK 20180308164538.0 cr unu---uuuuu 161202e19950301xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082623 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082623 Assessment of Lung Deposition and Breathing Rate of Underground Miners in Tadjikistan [Elektronische Daten] [L.S. Ruzer, A.V. Nero, N.H. Harley] Deposited gamma ray activity in miners' lungs and airborne concentrations of 222Rn decay products were measured in a metal mine in Tadjikistan. Measurements for about 100 miners were performed, using filtered air samples to estimate their decay product exposures and a field gamma ray system to determine corresponding chest activities. These two quantities yielded the deposited lung activity per unit exposure, which is proportional to the product of the average minute volume and the fractional lung deposition, called here the 'filtration ability of lungs' (FAL). The group average FALs were found to be, for drillers, assistant drillers, and inspection personnel, respectively, 0.0079, 0.0067, and 0.0052 m3.min-1, with approximately 20% standard error. Independent measurements were also made, for a group of mine workers engaged in light work, not only of FAL, but also of breathing rate (minute volume), permitting estimation of the lung deposition fraction, found to average 0.34±0.03. Finally, this value was used together with the group FALs noted to yield upper-bound estimates of the average minute volumes for these job categories, respectively, 0.023±0.004, 0.020±0.004, and 0.015±0.003 m3.min-1. Radiation Protection Dosimetry Ruzer L.S. aut Nero A.V. aut Harley N.H. aut Radiation Protection Dosimetry Oxford University Press 58/4(1995-03-01), 261-268 0144-8420 58:4<261 1995 58 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082623 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082623 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ruzer L.S. aut NATIONALLICENCE 700 1- Nero A.V. aut NATIONALLICENCE 700 1- Harley N.H. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 58/4(1995-03-01), 261-268 0144-8420 58:4<261 1995 58 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford