Results 241 to 250 of about 2,139,344 (304)

Tracer-to-tracee ratio for analysis of stable isotope tracer data: link with radioactive kinetic formalism

American Journal of Physiology - Endocrinology and Metabolism, 1992
G Toffolo, D M Foster
exaly   +2 more sources

Stable isotopes of calcium as tracers: methodology

Clinica Chimica Acta, 1985
While radioisotopic tracers have been used extensively, stable isotopes may, in principle, give the same information and offer several advantages for some investigations. Since there is no radiation involved, experiments using such high risk groups as children and pregnant women become possible.
D L, Smith, C, Atkin, C, Westenfelder
openaire   +2 more sources

Models to interpret kinetic data in stable isotope tracer studies.

American Journal of Physiology, 1987
In contrast to "weightless" radioactive tracers, stable isotope tracers have nonnegligible mass and are naturally present in the system, and the measured variable is a ratio of two isotopic species. These features do not allow stable isotopic tracer data
C. Cobelli, G. Toffolo, D. Bier, Romano Nosadini   +3 more
semanticscholar   +3 more sources

Stable Isotopes as Tracers in Clinical Research

Annals of Nutrition and Metabolism, 1989
The increased availability of an extensive range of stable isotope-labelled substrates and their ever decreasing cost, as well as the availability of sensitive analytical instruments, suggests that stable isotopes will increasingly be employed in all branches of medical research.
P J, Pacy, K N, Cheng, G N, Thompson, D, Halliday   +3 more
openaire   +2 more sources

Ferrokinetic studies with stable isotopes as tracers

Medical Physics, 1987
A methodology for ferrokinetic studies based on the administration of iron stable isotopes was developed. Fractional plasma clearance and intestinal iron absorption in rabbits were determined using the double tracer technique. Three rabbits were given 58Fe solution intravenously and about 40 min later 57Fe solution orally.
M.C. Cantone, N. Molho, L. Pirola, C. Hansen, P. Roth, E. Werner   +5 more
openaire   +3 more sources

Stable Lead Isotopes as a Tracer in Coastal Waters

Science, 1981
The natural abundances of the stable isotopes of lead are used to identify natural and industrial sources of lead in the coastal waters of British Columbia, Canada. The 206 Pb/ 207 Pb ratios, used to characterize the lead source, had values of ∼ 1.24 for coastal oceanic water, ∼ 1.22 for ...
V J, Stukas, C S, Wong
openaire   +2 more sources

The Use of Stable Isotopic Tracers in Metallomics Studies

2018
Mass spectrometry represents an essential technique in Metallomics studies. It permits the identification of metal-containing molecules as part of the metallome as well as their quantification at low concentration levels. The technique becomes even more powerful in combination with the use of isotopically enriched species. Provided that they are stable,
Maria, Montes-Bayón, Jörg, Bettmer
openaire   +2 more sources

Stable Isotopes As Tracers In Ocean Sciences

Proceedings OCEANS '83, 1983
By making use of differences in stable carbon isotope ratios, which have resulted from chemical isotope effects, for carbon reservoirs large scale tracer experiments have been observed. These natural experiments have been used to quantify ocean pollution, sediment sources and duck food-webs.
P. Parker, R. Anderson, J. Winters, R. Scalan   +3 more
openaire   +1 more source

Stable isotopes as metabolic tracers

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1988
Abstract Stable isotopes (2H, 13C) may be used to study various aspects of the metabolism of endogenous or exogenous compounds. Labelling with more than one heavy atom makes it possible to draw conclusions regarding metabolic pathways and compartmentation. This is exemplified by the incorporation in e.g.
openaire   +1 more source

Calculation of stable isotope enrichment for tracer kinetic procedures

Biological Mass Spectrometry, 1985
The choice of method of expressing isotopic enrichment in tracer kinetic experiments utilizing stable isotopes was found to affect the calculation of tracee pool size and half-life. The most commonly used definition, the difference between enriched and natural abundance, i.e.
W T, Buckley, S N, Huckin, G K, Eigendorf   +2 more
openaire   +2 more sources