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A comprehensive survey of the population exposed to high-level natural radiation is presented. The population living in Karunagappally taluk in Kerala, India, presents a unique opportunity for studies on the health effects of chronic exposure to low-level radiation. The environmental radiation emanates largely from the thorium deposited mostly along coastal(More)
Population exposures to toxic trace metals are of great concern due to their nonbiodegradable nature and long biological half-lives for elimination from the body. Response to a toxic metal varies with age group; children are more sensitive and hence more at risk than others. The present study was therefore undertaken on 6- to 10-year-old children residing(More)
The hormesis hypothesis, which suggests that ecologically realistic low levels of ionising radiations may be beneficial to humans, seems to be substantiated significantly by the data available on cancer incidence/mortality rates and environmental radiation levels in various cities and states of India. Where the radiation level is greater, cancer risk is(More)
Retention times of Pb, Cd, Cu and Zn in blood of 6- to 10-year-old children are estimated by measurements of levels of these metals in air particulate, duplicate diet and blood of 19 children residing in different locations in Mumbai (previously, Bombay) city. Retention times of 20.3, 9.1, 2.3 and 2.3 days for Pb, Cd, Cu and Zn, respectively are observed.
The study area Thane Creek, lies on the southern part of the Deccan belt of India between latitude 18 degrees 53'-19 degrees 04' N and longitude 72 degrees 48'-72 degrees 53' E and includes the Ulhas river estuaries. Lead-210 (half-life of 22.3 years) is used for an estimation of recent sedimentation rate in Thane Creek using radiochemical separation and(More)
Cancer mortality risks for individuals who were employed at nuclear facilities in Tarapur and for their respective family members with whom they lived were examined. Cancer deaths that occurred in this population between 1971 and 1988 were compared with death rates published by the Bombay City Cancer Registry. Risks were expressed as standardized mortality(More)
Cancer deaths recorded by the centralised health services of the Department of Atomic Energy (DAE) among its employees and their families stationed in Bombay during 1975-1987 have been analysed. Expected number of deaths due to cancer in the study group has been estimated by using the age-sex-specific cancer death rates reported for Bombay resident(More)
A detailed examination is presented of the thermoluminescence (TL) characteristics of untreated and heat-treated pure and Ba-doped NaCl exposed to gamma radiation at room temperature. The NaCl:Ba (10(-2) molar fraction) phosphor quenched from 750 degrees C, designated as NaCl:Ba(T), is found to give a pronounced TL output with a well-defined glow peak(More)