Committed dose equivalent for 3H intakes from urinary excretion data.
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Biomedical subjects
R G Purohit
Publications and source records attributed to R G Purohit.
A unique method of determining 3H intakes as a fraction of the annual limit of intake.
The internal dose due to 3H is generally estimated by the measurement of average 3H concentration in urine. The concentration in urine, however, depends very much on the effective half-life which in turn varies from season to season and from person to person. This means that the annual limit of intake (ALI) would also vary. The latest recommendations of International Commission on Radiological Protection (ICRP) suggest that internal dose be controlled as fractions of ALI. This paper suggests a method for determining intake as a fraction of the ALI by measuring 3H concentrations in urine and inter alia taking into account the variations of effective half-life in individuals.
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Chronic pulmonary cryptococcosis in a Rattus rattus from Rabaul, Papua New Guinea.
A wild Rattus rattus trapped in Rabaul, East New Britain Province, Papua New Guinea, was noted to have chronic, cystic pulmonary cryptococcosis. R. rattus is common in settlements in Papua New Guinea whereas pigeons, which have been suspected as a possible source of human cryptococcosis, rarely nest in villages in this country. If R. rattus was susceptible to chronic pulmonary cryptococcosis, because of its habit of nesting in roofs, it could serve as a possible vector of human cryptococcosis in Papua New Guinea and perhaps in other countries as well.
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