title: Intake and excretion of 99Tc in a common sea alga, hijiki (Hizikia fusiforme), as ingested in the daily diet--a measurement in an adult male.
abstract: Ingestion and excretion of environmental 99Tc was measured in an adult male who ingested 'hijiki' food in his diet that contained a sub-bequerel activity per kg, and which was prepared from a marine alga, Hizikia fusiforme, or hijiki in Japanese, traditionally eaten in the Japanese diet. Harvested hijiki was boiled, dried and cooked. This was eaten at each meal five times over 2 d. All faeces and 24-h urine samples were collected during the 3 d before and subsequent 11 d starting from the day when the intake began. The ingestion intake was measured by analysing the dried hijiki material. 99Tc was determined by using liquid-liquid extraction and low-background beta ray spectrometry. The excreta were also analysed for minerals by atomic absorption spectrometry. The apparent absorption rate in the gastrointestinal tract for 99Tc under these conditions was calculated to be approximately 0.5. The present result from a single subject indicates the need for further studies.
authors.affiliation: National Institute of Radiological Sciences, Anagawa, Chiba, 263-8555, Japan. kawamura@jmsfmml.of.jp
authors.forename: H
authors.initials: H
authors.lastname: Kawamura
authors.forename: S
authors.initials: S
authors.lastname: Hirano
authors.forename: M
authors.initials: M
authors.lastname: Nishimuta
mesh_terms: D000284:Administration, Oral; D001822:Body Burden; D004064:Digestive System / Q000378:metabolism; D005243:Feces / Q000737:chemistry*; D005507:Food Contamination, Radioactive / Q000032:analysis*; D006801:Humans; D007408:Intestinal Absorption / Q000502:physiology*; D008297:Male; D008657:Metabolic Clearance Rate / Q000502:physiology; D008875:Middle Aged; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012624:Seaweed / Q000737:chemistry*; D013667:Technetium / Q000008:administration & dosage / Q000032:analysis / Q000493:pharmacokinetics* / Q000652:urine*
chemical_list: D013667:Technetium