TRANSFER FACTORS AND TURNOVER OF THO AND OF ORGANICALLY BOUND TRITIUM IN TWO RELATED ANIMAL SPECIES WITH A VIEW ON MODELLING
Tritium was administered as tritiated water (THO) and as organically bound tritium (OBT) to lactating cows and as OBT only to lactating goats. The transfer of tritium to milk is about 1.5-1.6 % of the daily ingested tritium per liter of milk for cows after both THO and OBT administration. In the goat this transfer is about 37 % per liter of milk. After ingestion of THO to cows more than 96 % of the tritium is in milk water. This fraction is only 53 % after OBT feeding, 47 % of the tritium being incorporated into organic milk constituents. The highest level of incorporation of tritium is in milk fat (34 %), followed by casein (11 %) and the lowest in lactose (2.5 %). The relative incorporation of tritium in casein and lactose is similar in cows and goats but the cow incorporates three times as much tritium in milk fat as does the goat. The goat secretes much more tritium into her milk than does the cow (except for milk fat) for the same tritium intake. The differences can be explained on the basis of dilution of OBT into different quantities of food and water, ingested by the species.
Bibliographic Reference: SEMINAR ON THE ENVIRONMENTAL TRANSFER TO MAN OF RADIONUCLIDES RELEASED FROM NUCLEAR INSTALLATIONS, BRUXELLES (BELGIUM), OCT. 17-21, 1983 - WRITE TO CEC LUXEMBOURG DG XIII/A2, POB 1907 MENTIONING PAER E 31257 ORA
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Record Number: 1989122026100 / Last updated on: 1987-01-01
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