Titre du document / Document title

Non-exchangeable organically bound tritium (OBT): its real nature

Auteur(s) / Author(s)

BAUMGÄRTNER F. ⁽¹⁾ ; DONHAERL W. ⁽²⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Institut for Radiochemie, Technische Universität Munich, 85748 Garching, ALLEMAGNE
⁽²⁾ Bundesamt für Strahlenschutz, 85764 Oberschleissheim-Neuherberg, ALLEMAGNE

Résumé / Abstract

Denaturation 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). This is reflected by tritium accumulation for 1.4 and 2 in the primary hydration shell and in the base-pairing hydrogens of DNA respectively. If tritons and protons are considered as quantum mechanical entities, the accumulative tritium transfer from water to the hydrogen bonds of biopolymers is generally valid. Growth experiments confirm the assumed rapid isotope exchange in vivo, which is not observed in vitro by denaturation.

Revue / Journal Title

Analytical and bioanalytical chemistry   ISSN 1618-2642 

Source / Source

Congrès
International Conference on Isotopic and Nuclear Analytical Techniques for Health and Environment, Vienna , AUTRICHE (10/06/2003)
2004, vol. 379, n^o2, pp. 204-209 [6 page(s) (article)] (28 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (2002) (Revue)

Mots-clés anglais / English Keywords

Plant ; Water ; DNA ; Tritium ; Specific activity ; Liquid scintillation ; Denaturation ; In vivo ; Isotope exchange ; Hydrogen bond ; Hydrogen isotopes ;

Mots-clés français / French Keywords

Plante ; Eau ; DNA ; Tritium ; Activité spécifique ; Scintillation liquide ; Dénaturation ; In vivo ; Echange isotopique ; Liaison hydrogène ; Hydrogène isotope ;

Mots-clés espagnols / Spanish Keywords

Planta ; Agua ; DNA ; Tritio ; Actividad específica ; Centelleografía líquida ; Desnaturalización ; In vivo ; Intercambio isotópico ; Enlace hidrógeno ;

Localisation / Location

INIST-CNRS, Cote INIST : 853, 35400011001600.0050