Measurement of total body water using 2H dilution: impact of different calculations for determining body fat

Measurement of total body water using 2H dilution: impact of different calculations for determining body fat.

This study estimated total body water (TBW) in four groups (twelve per group; sedentary and highly trained men and women) at the time of 2H dosing (T0) and after a 3.5 h equilibration period (Teq). Standard TBW calculations were employed at T0 (no correction for disproportionate urinary tracer loss) and Teq (correction for urinary tracer loss only), plus those calculations that corrected for a ...

Measurement of total body water using H dilution: impact of different calculations for determining body fat

This study estimated total body water (TBW) in four groups (twelve per group; sedentary and highly trained men and women) at the time of H dosing (T0) and after a 3·5 h equilibration period (Teq). Standard TBW calculations were employed at T0 (no correction for disproportionate urinary tracer loss) and Teq (correction for urinary tracer loss only), plus those calculations that corrected for a d...

Measurement of change in total body fat.

The measurement of total body water in living pigs by deuterium oxide dilution and its relation to body composition.

I. Deuterium oxide was used to estmate body water in twenty-four pigs of widely differing body composition and of average weight 83.9 kg. 2. After infusion of the isotope, blood samples were collected every 30 min for 4 h. The resulting plasma was purified by a heat-distillation procedure, after which it was analysed for D,O by infrared spectroscopy. 3. Approximately 24 h after infusion of the ...

MEASUREMENT OF D2O IN WATER USING 2H(?,n)1H REACTION

Utilization of Photodisintegration reaction of Deuterium, 2H(?,n)1H, is a precise technique for determining the percentage of 2H in tritiated and natural water. The 23Na(n,?)24Na reaction is a suitable ?-source for producing the 2H(?,n)1H reaction. Tehran Research Reactor was used as a neutron source for producing 24Na isotopes. The BF3 detectors were used to detect the neutron emission of H2 c...