Measurement of the transfer coefficient for radiocesium transport from a sheep's diet to its milk
The rate of increase and decay of radio contamination secreted in sheep's milk, resulting from a constant level of radiocesium in the animals' diet, was investigated. Ten lactating ewes were used in the experiment. For a period of 12 d the animals fed on contaminated grass, resulting in a daily radiocesium intake of 832 Bq per animal. They were subsequently returned to a contamination-free diet and were monitored for another 9 d. Throughout the period of the experiment, /sup 134/Cs and /sup 137/Cs concentrations in the animals' milk were measured daily with an 18% efficiency, high-resolution Ge detector. The data were in satisfactory agreement with the predictions of a simple two-compartment theory. The transfer coefficient, describing the steady-state equilibrium in this model, was measured as fm = 0.058 +/- 0.007 dL-1.
- Research Organization:
- Univ. of Ioannina, Greece
- OSTI ID:
- 5649870
- Journal Information:
- Health Phys.; (United States), Journal Name: Health Phys.; (United States) Vol. 53:6; ISSN HLTPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Kinetics
& Toxicology-- Man
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METAL ISOTOPES
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BIOLOGICAL MODELS
BODY FLUIDS
CESIUM 134
CESIUM 137
CESIUM ISOTOPES
CONTAMINATION
DOMESTIC ANIMALS
FOOD
FOOD CHAINS
HOURS LIVING RADIOISOTOPES
INTAKE
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LACTATION
MAMMALS
MATERIALS
MEMBRANE TRANSPORT
MILK
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PREGNANCY
RADIOISOTOPES
RADIONUCLIDE KINETICS
RUMINANTS
SHEEP
VERTEBRATES
YEARS LIVING RADIOISOTOPES