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Title: Organically bound tritium

Abstract

Tritium released into the environment may be incorporated into organic matter. Organically bound tritium in that case will show retention times in organisms that are considerably longer than those of tritiated water which has significant consequences on dose estimates. This article reviews the most important processes of organically bound tritium production and transport through food networks. Metabolic reactions in plant and animal organisms with tritiated water as a reaction partner are of great importance in this respect. The most important production process, in quantitative terms, is photosynthesis in green plants. The translocation of organically bound tritium from the leaves to edible parts of crop plants should be considered in models of organically bound tritium behavior. Organically bound tritium enters the human body on several pathways, either from the primary producers (vegetable food) or at a higher tropic level (animal food). Animal experiments have shown that the dose due to ingestion of organically bound tritium can be up to twice as high as a comparable intake of tritiated water in gaseous or liquid form. In the environment, organically bound tritium in plants and animals is often found to have higher specific tritium concentrations than tissue water. This is not due tomore » some tritium enrichment effects but to the fact that no equilibrium conditions are reached under natural conditions. 66 refs.« less

Authors:
;  [1]
  1. Kernforschungszentrum Karlsruhe GmbH, Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
5545686
Resource Type:
Journal Article
Journal Name:
Health Physics; (United States)
Additional Journal Information:
Journal Volume: 65:6; Journal ID: ISSN 0017-9078
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 59 BASIC BIOLOGICAL SCIENCES; FOOD; BIOLOGICAL ACCUMULATION; TRITIUM; ENVIRONMENTAL EXPOSURE PATHWAY; FOOD CHAINS; TRITIUM OXIDES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHALCOGENIDES; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; NUCLEI; ODD-EVEN NUCLEI; OXIDES; OXYGEN COMPOUNDS; RADIOISOTOPES; TRITIUM COMPOUNDS; YEARS LIVING RADIOISOTOPES; 560160* - Radionuclide Effects, Kinetics, & Toxicology; 550500 - Metabolism

Citation Formats

Diabate, S, and Strack, S. Organically bound tritium. United States: N. p., 1993. Web. doi:10.1097/00004032-199312000-00008.
Diabate, S, & Strack, S. Organically bound tritium. United States. doi:10.1097/00004032-199312000-00008.
Diabate, S, and Strack, S. Wed . "Organically bound tritium". United States. doi:10.1097/00004032-199312000-00008.
@article{osti_5545686,
title = {Organically bound tritium},
author = {Diabate, S and Strack, S},
abstractNote = {Tritium released into the environment may be incorporated into organic matter. Organically bound tritium in that case will show retention times in organisms that are considerably longer than those of tritiated water which has significant consequences on dose estimates. This article reviews the most important processes of organically bound tritium production and transport through food networks. Metabolic reactions in plant and animal organisms with tritiated water as a reaction partner are of great importance in this respect. The most important production process, in quantitative terms, is photosynthesis in green plants. The translocation of organically bound tritium from the leaves to edible parts of crop plants should be considered in models of organically bound tritium behavior. Organically bound tritium enters the human body on several pathways, either from the primary producers (vegetable food) or at a higher tropic level (animal food). Animal experiments have shown that the dose due to ingestion of organically bound tritium can be up to twice as high as a comparable intake of tritiated water in gaseous or liquid form. In the environment, organically bound tritium in plants and animals is often found to have higher specific tritium concentrations than tissue water. This is not due to some tritium enrichment effects but to the fact that no equilibrium conditions are reached under natural conditions. 66 refs.},
doi = {10.1097/00004032-199312000-00008},
journal = {Health Physics; (United States)},
issn = {0017-9078},
number = ,
volume = 65:6,
place = {United States},
year = {1993},
month = {12}
}