Results 101 to 110 of about 171 (143)
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Health Physics, 1993
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.
Diabate, S., Strack, S.
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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.
Diabate, S., Strack, S.
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Metabolism of Organically Bound Tritium in Man
Radiation Research, 1984The classic methodology for estimating dose to man from environmental tritium assumes that all tritium, whether organically bound or free, enters directly into man's free body water compartment and is uniformly distributed as tritiated water. This methodology ignores the fact that organically bound tritium in foodstuffs may be directly assimilated in ...
E L, Etnier, C C, Travis, D M, Hetrick
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THEORETICAL ORGANICALLY BOUND TRITIUM DOSE ESTIMATES
Health Physics, 2004This paper illustrates a theoretical approach to estimating the dose associated with the ingestion of both organically bound tritium and tissue free water tritium relative to the ingestion of only tissue free water tritium. Organically bound tritium, specifically non-exchangeable OBT, can result in an increased dose relative to that from exchangeable ...
T A, DeVol, B A, Powell
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Journal of Environmental Radioactivity, 2008
In order to quantify tritium impact on the environmental, we studied vegetation continuously exposed to a tritiated atmosphere. We chose lichens as bio-indicators, trees for determination of past tritium releases of the Valduc Centre, and lettuce as edible vegetables for dose calculation regarding neighbourhood.
Vichot*, L. +4 more
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In order to quantify tritium impact on the environmental, we studied vegetation continuously exposed to a tritiated atmosphere. We chose lichens as bio-indicators, trees for determination of past tritium releases of the Valduc Centre, and lettuce as edible vegetables for dose calculation regarding neighbourhood.
Vichot*, L. +4 more
exaly +4 more sources
Organically Bound Tritium Analysis in Environmental Samples
Fusion Science and Technology, 2015Many methods allow analysing the various forms of tritium in environmental samples; however, there are no published standard methods for measuring organically bound tritium (OBT). Furthermore, there are no certified reference materials of OBT for environmental samples.
Baglan, N. +8 more
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Applied Radiation and Isotopes, 2016
This paper reports an improved combustion apparatus for the determination of organically bound tritium in environmental samples. The performance of this apparatus including the recovery rate and reproducibility was investigated by combusting lettuce and pork samples.
Youshi Zeng
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This paper reports an improved combustion apparatus for the determination of organically bound tritium in environmental samples. The performance of this apparatus including the recovery rate and reproducibility was investigated by combusting lettuce and pork samples.
Youshi Zeng
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The human body retention time of environmental organically bound tritium
Journal of Radiological Protection, 2009Tritium in the UK environment causes low radiation doses to the public, but uncertainty exists in the dose coefficient for the organically bound component of tritium (OBT). This can affect the assessment of effective doses to representative persons. Contributing to that uncertainty is poor knowledge of the body retention time of OBT and how this varies
John, Hunt, Trevor, Bailey, Allan, Reese
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Uptake of Tritium in the Organically Bound Form into the Biomass of the Soil
Fusion Technology, 1988Laboratory experiments and field observations have shown that elemental tritium HT is completely converted into tritiated water (HTO) by the activity of soil microorganisms. No organically bound tritium (OBT) is formed initially, but some tritium is taken up into soil biomass by general biosynthesis.
H. Förstel, H. Papke, I. Hillmann
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Experience acquired on environmental sample combustion for organically bound tritium measurement
Applied Radiation and Isotopes, 2009In order to determine organically bound tritium (OBT) concentrations, environmental samples are generally first freeze-dried. This first step is to remove tritiated water. Then, the dry residue is burnt in a special furnace with oxygen. Finally, the tritiated water fraction obtained is measured using a liquid scintillation counter.
C, Cossonnet +2 more
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Non-exchangeable organically bound tritium (OBT): its real nature
Analytical and Bioanalytical Chemistry, 2004Denaturation experiments show that the larger part of organically bound tritium (OBT) consists of "buried tritium" and is not bound to carbon, as has been traditionally assumed. The logistical growth analysis of hydrogen isotopes in dry plant matter reveals a larger rate of increase of OBT than organically bound hydrogen (OBH).
F, Baumgärtner, W, Donhaerl
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