Five experiments that support this scheme are presented. 1. The conversion of 3-T-isocitrate to citrate at early times gives T-citrate with no loss of tritium. 2. When the conversion of 2-T-citrate to isocitrate is brought to completion by trapping the isocitrate with isocitrate dehydrogenase, and the oc-ketoglutarate formed with glutamate dehydrogenase, the amount of tritium found in the gluta...

(2R)-Methyl[2-3H]malonyl-CoA was used as the substrate for methylmalonyl-CoA epimerase from Propionibacterium shermanii, under conditions where the (2S)-methylmalonyl-CoA product was removed enzymically as fast as it was formed, and the fate of the label was monitored at different extents of reaction. Very little, if any, tritium is found attached to the C-2 position in the (2S)-epimer product ...

Abstract. The combined use of deuterium and tritium to determine travel time distributions (TTDs) in streams is an important development catchment hydrology (Rodriguez et al., 2021). This comment takes issue with Rodriguez al.'s assertion that the truncation hypothesis may not hold for catchments general, i.e. stable isotopes alone lead underestimation times or storage compared tritium. We disc...

Progress in the performance of tokamak devices has enabled not only the production of significant bursts of fusion energy from deuterium-tritium (D-T) plasmas in the Tokamak Fusion Test Reactor (TFTR) and the Joint European Torus (JET) but, more importantly, the initial study of the physics of burning magnetically confined plasmas. TFTR and JET, in conjunction with the worldwide fusion effort, ...

In a Pressurized Heavy Water Reactor (PHWR), most internal radiation exposure is attributed to tritium. Carbon-14 is not a dominant nuclide in the radiation exposure of workers, but it is one of the potential nuclide that needs to be monitored. Carbon-14 is a low energy beta emitter and passes relatively easily into the body of workers by inhalation because its dominant chemical form is radioac...