scholarly journals [Isotope tracer studies of diffusion in silicates and of geological transport processes using actinide elements]. Progress report

1991 ◽  
Author(s):  
G.J. Wasserburg
Keyword(s):  
Progress Report ◽  
Transport Processes ◽  
Tracer Studies ◽  
Isotope Tracer ◽  
Actinide Elements

scholarly journals Simulation of the dynamics of nitrogen metabolism in sheep

1976 ◽  
Vol 35 (1) ◽  
pp. 149-174 ◽  
Author(s):  
A. Mazanov ◽  
J. V. Nolan
Keyword(s):  
Mathematical Model ◽  
Nitrogen Metabolism ◽  
Transport Processes ◽  
Simulation Studies ◽  
Tracer Studies ◽  
First Order ◽  
Isotope Tracer ◽  
First Order Kinetics ◽  
Pool Model ◽  
N Metabolism

1. The results of isotope tracer studies of the dynamics of nitrogen metabolism in mature sheep were used to construct a seven-pool mathematical model.2. The model was extended to a nine-pool model, which incorporates lags describing the time taken for the passage of digesta through the gut of sheep.3. Simulation studies using these models satisfactorily predicted results of independent experiments.4. The dynamics of N metabolism in sheep appear to be best approximated by first-order kinetics; that is, many of the important N transport processes are substantially linear or concentration-dependent.

scholarly journals Positional Enrichment by Proton Analysis (PEPA): A One-Dimensional 1 H-NMR Approach for 13 C Stable Isotope Tracer Studies in Metabolomics

2017 ◽  
Vol 56 (13) ◽  
pp. 3531-3535 ◽  
Author(s):  
Maria Vinaixa ◽  
Miguel A. Rodríguez ◽  
Suvi Aivio ◽  
Jordi Capellades ◽  
Josep Gómez ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Tracer Studies ◽  
Stable Isotope Tracer ◽  
One Dimensional ◽  
Isotope Tracer ◽  
H Nmr
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