title: Biological half-life of gaseous elemental iodine deposited onto rice grains.
abstract: In order to obtain the biological half-life (Tb) of iodine deposited on rough rice grains, rice plants of four different growing stages--heading, milky, dough, and yellow ripe--were exposed to elemental gaseous iodine. After the exposure, the rough rice samples were collected at different intervals and analyzed for iodine to estimate the value of Tb. The average value of Tb obtained by the experiments at the dough and yellow ripe stages was about 200 d. This value is considerably larger than those for pasture grass and leafy vegetables.
authors.affiliation: Division of Radioecology, National Institute of Radiological Sciences, Ibaraki, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Uchida
authors.forename: Y
authors.initials: Y
authors.lastname: Muramatsu
authors.forename: M
authors.initials: M
authors.lastname: Sumiya
authors.forename: Y
authors.initials: Y
authors.lastname: Ohmomo
mesh_terms: D005507:Food Contamination, Radioactive; D006207:Half-Life; D007457:Iodine Radioisotopes; D012275:Oryza
chemical_list: D007457:Iodine Radioisotopes