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1.
Measurement of specific alpha radioactivity with respect to size for uranium ore dust using aerosol centrifuge.
Kotrappa, P; Bhanti, D P; Jha, G.
Health Phys ; 36(6): 738-40, 1979 Jun.
Article in English | MEDLINE | ID: mdl-468550

Subject(s)
Alpha Particles , Dust , Mining , Uranium , Air Pollutants, Occupational , Air Pollutants, Radioactive , Particle Size
2.
Electrostatic charge on decay products of thoron.
Dua, S K; Kotrappa, P; Bhanti, D P.
Am Ind Hyg Assoc J ; 39(4): 339-45, 1978 Apr.
Article in English | MEDLINE | ID: mdl-645564

Subject(s)
Radon , Aerosols , Electricity , Radioactivity
3.
The performance of nebuliser and air ejector made from sections of hypodermic needles.
Kotrappa, P; Mayya, Y S; Raghunath, B; Menon, V B; Bhanti, D P.
Ann Occup Hyg ; 19(3-4): 363-6, 1976 Dec.
Article in English | MEDLINE | ID: mdl-1026160

Subject(s)
Aerosols , Equipment and Supplies , Evaluation Studies as Topic , Needles
4.
Assessment of airborne hazards in the thorium processing industry.
Kotrappa, P; Bhanti, D P; Menon, V B; Dhandayutham, R; Gohel, C O; Nambiar, P P.
Am Ind Hyg Assoc J ; 37(11): 613-6, 1976 Nov.
Article in English | MEDLINE | ID: mdl-998494

ABSTRACT

Airborne thorium thoron and its decay products contribute significantly to the hazards in the thorium industry. These have been assessed and compared with the standards. Assessment also included the unattached fractions of the decay products, the thoron working levels and the aerodynamic particle size distribution of airborne thorium.


Subject(s)
Air Pollutants, Occupational/analysis , Air Pollutants/analysis , Thorium , India , Particle Size
5.
Diffusion coefficients for unattached decay products of thoron--dependence on ventilation and relative humidity.
Kotrappa, P; Bhanti, D P; Raghunath, B.
Health Phys ; 31(4): 378-80, 1976 Oct.
Article in English | MEDLINE | ID: mdl-993036

Subject(s)
Air Pollution, Radioactive/prevention & control , Radon , Diffusion , Humidity , Occupational Medicine , Ventilation
6.
Dynamic shape factors for PuO2 aerosols useful in autoradiographic particle size analysis.
Kotrappa, P; Sundararajan, A R; Bhanti, D P; Menon, V B.
Health Phys ; 29(5): 701-4, 1975 Nov.
Article in English | MEDLINE | ID: mdl-1193882

Subject(s)
Plutonium , Aerosols , Autoradiography , Oxides , Particle Size
7.
Diffusion sampler useful for measuring diffusion coefficients and unattached fraction of radon and thoron decay products.
Kotrappa, P; Bhanti, D P; Dhandayutham, R.
Health Phys ; 29(1): 155-62, 1975 Jul.
Article in English | MEDLINE | ID: mdl-1150452

Subject(s)
Radiation Monitoring/instrumentation , Radon/analysis , Thorium/analysis , Evaluation Studies as Topic
8.
A single stage centripeter for rapid analysis of long-lived alpha emitters in air.
Kotrappa, P; Bhanti, D P; Dua, S K; Joshi, P P.
Health Phys ; 27(1): 103-8, 1974 Jul.
Article in English | MEDLINE | ID: mdl-4430607

Subject(s)
Air Pollution, Radioactive/analysis , Alpha Particles , Filtration/instrumentation , Aerosols , Plutonium/analysis , Radon/analysis , Thorium/analysis , Time Factors , Uranium/analysis
9.
Smoke puff generator for room air movement studies.
Kotrappa, P; Bhanti, D P.
Am Ind Hyg Assoc J ; 28(2): 171-4, 1967.
Article in English | MEDLINE | ID: mdl-5230368

Subject(s)
Equipment and Supplies , Ventilation , Humans , Ventilators, Mechanical
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