Dietary232Th and238U intakes for Japanese as obtained in a market basket study and contributions of imported foods to internal doses

Daily intakes of naturally occurring radioisotopes in typical Korean foods

“…Average daily consumption of 230 Th in Korea was lower than in Poland (Pietrzak-Flis et al, 2001) and the United States (Fisenne et al, 1987); in contrast, 228 Th intakes were greater in Korea than in Poland (Pietrzak-Flis et al, 2001) and were similar to those in the United States (Fisenne et al, 1987). Although daily 232 Th intake in Korea was the same as that in Japan (Shiraishi and Yamamoto, 1995) and United States (Fisenne et al, 1987), it was much lower than in India (Shiraishi et al, 2000;UNSCEAR, 2000). These results may be explained by differences in soil 232 Th concentrations.…”

“…The concentrations and internal doses of natural radioisotopes within food samples have been investigated in Europe (Pietrzak-Flis et al, 2001), Asia (Shiraishi and Yamamoto, 1995;Alam et al, 1995;Akhter et al, 2003) and in the United States (Fisenne et al, 1987) for many years.…”

Nuclear Analytical Techniques in Animal Sciences: New Approaches and Outcomes

“…Uranium in nature is more plentiful than silver (Ag) and about as abundant as arsenic (As). It is found in very small amounts in the form of minerals, especially in rocks, soil, water, air, plants and animal tissues that could be consumed as food containing varying amounts of uranium [23].…”

238U and232Th concentrations in various foodstuffs in Morocco and resulting radiation doses to the members of the public

“…Naturally occurring radionuclides enter the human body mainly by inhalation of radon and thoron gases and their decay products (Misdaq et al, 2001) and by ingestion of primordial radionuclides and their progeny: 40 K, and the 238 U and 232 Th series (Fisenne et al, 1987;Shiraishi et al, 2000Shiraishi et al, , 1995Dang et al, 1990;Pietrzak-Fils et al, 1997;Singh et al, 1990). Due to their presence in soil and phosphate fertilizers, primordial radionuclides and their progeny are transferred via the food chain to human body.…”

“…Three food categories, fish and shellfish, cereals (excluding rice) and vegetables are found to be the main contributors to the daily intakes of 238 U and 232 Th in the USA (Fisenne et al, 1987). In Japan, two food categories, fish and shellfish, and vegetables are the main contributors to 238 U and 232 Th dietary intakes (Shiraishi et al, 2000(Shiraishi et al, , 1995Kuwahara et al, 1997). Uranium and thorium concentrations have been measured in various food and drink samples in Hong-Kong by using gamma-ray spectrometry (Yu and Mao, 1999).…”