Isotope tracing

Catalyst characterization and Mechanistic Studies 3.2.1 Steady-State isotopic tracing experiments... 

Chabaux F, Riotte J, Clauer N, France-Lanord Ch (2001) Isotopic tracing of the dissolved U fluxes of Himalayan rivers implications for present and past U budgets of Ganges-Brahmaputra system. Geochim Cosmochim Acta 65 3201-3217... 

Region, South China Results Based on Carbon Isotopic Tracing...233... 

Multiple isotope tracing of methanation over nickel catalyst. J. Catal. 1980. 65, 59. 

Isotopic Tracing with l NO. To trace out the dynamics of nitrogen incorporation into the products under conditions where the surface coverage by adsorbed NO remains constant, experiments... 

Reduction of aldonolactones and their derivatives with isotopically modified reducing agents leads to sugars labeled at the anomeric center. Glycosides substituted with deuterium or labeled with tritium are widely employed for kinetic isotope-effect measurements, mechanistic studies, isotope-tracing experiments, and so on. 

Millot, R. Negrel, P. 2007. Multi-isotopic tracing (delta (super 7) Li, delta (super 11) B, (super 87) Sr/ (super 86) Sr) and chemical geothermometry evidence from hydro-geothermal systems in France. Chemicai Geoiogy, 244, 664-678. 

Chemical Geology, 243(3-4), 238-254. Kimball, B., ef al. (in print) Copper isotope fractionation in acid mine drainage. Geochimica et Cosmochimica Acta LARSON, P.B. et al. 2002. Cu isotopes tracing metal sources in ore deposits. Geochimica et Cosmochimica Acta, 66(15A), 432. 

Steinmann, K., Siegwolf, R. T. W., Saurer, M., and Korner, C. (2004). Carbon fluxes to the soil in a mature temperate forest assessed by 13C isotope tracing. Oecologia 141(3), 489-501. 

Chanton, J.P., Whiting, GL. Showers, W.J., and Crill, P.M. (1992) Methane flux from Petulandra virginica stable isotope tracing and chamber effects. Global Biogeochem. Cycles 6, 15-31. 

Middelburg, J.J., and Nieuwenhuize, J. (2001) Nitrogen isotope tracing of dissolved inorganic nitrogen behavior in tidal estuaries. Estuar. Coastal Shelf Sci. 53, 385-391. 

Evidence of protracted growth history of skam garnet using SIMS oxygen isotope, trace element, and rare earth element data. Geol. Soc. Amer. Abstr. Prog. 1995. 

Garibaldi, P., Vanini, G., and Gilli, G. (1981). Isotopic tracing of lead into children from automobile exhaust. In Environmental Lead (D. Lynam, L. Piantanida, and J. Cole, eds.), pp. 9—21. Academic Press, Amsterdam, The Netherlands. 

The research of Bortolami and his coworkers (1978) provides an excellent example of a study aimed at a local calibration of an isotopic tracing technique. The variability observed between results of single samplings is probably extreme, since they worked on a karstic system which has a rapid response to individual storm events. 

Stahl et al. (1974) provided an excellent example of isotopic tracing of ground-water, in the Sperkhios Valley, Greece (insert in Fig. 9.24). The research followed the following logical steps ... 

NichoUs, J. C., Davies, C. A., and Trimmer, M. (2007). High-resolution profiles and nitrogen isotope tracing reveal a dominant source of nitrous oxide in multiple pathways of nitrogen gas formation in the central Arabian Sea. Limnol. Oceanogr. 52, 156—168. 

If the same concentration of CO is used but with H2 instead of He, there will be steady-state methanation over the Ni catalyst. This rate is measured by the rate of production of CH4, essentially the only hydrocarbon produced. Now the same isotopic tracing experiment can be done to determine the coverage of CO present on the surface during the reaction. A correction for the CO reacted must be included, although it may be small in a differential reactor 17). 

Martens C. S., Albert D. B., and Alperin M. J. (1999) Stable isotope tracing of anaerobic methane oxidation in the gassy sediments of Ekernorde Bay, German Baltic Sea. Am. J. Sci. 299, 589-610. 

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