| Autor: |
Winifred Ego, Sidney J. Townsley, Howard Boroughs |
| Rok vydání: |
1958 |
| Předmět: |
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| Zdroj: |
Limnology and Oceanography. 3:413-417 |
| ISSN: |
0024-3590 |
| DOI: |
10.4319/lo.1958.3.4.0413 |
| Popis: |
Arteinia salina (L.) was chosen as a representative organism in thc second trophic level for studying one phase of the process of transfer of radionuclides through a marine food chain. Adult Artemia were cultured in filtered sea water which contained Sr/sup 90/-Y/sup 90/. They were not fed during the experiment which lasted 92 hours. They were removed at intervals, washed, and their radioactivity determined with an end-window counter. At 16 hours the concentration of radioactivity in the Artemia was about 40 times that of an equal weight of sea water. The radioactivity decayed at a rate which was similar to the decay rate of Y/sup 90/. It was estimated that only about 5 per cent of the activity remaining at secular equilibrium was due to Sr/sup 90/, the remainder being Y/sup 90/. This biological fractionation of Sr/sup 90/-Y/sup 90/ may affect the transfer of these hazardous nuclides through food chains leading to human food. The fractionation of these nuclides by laboratory glassware is briefly discussed. (auth) |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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