Over time, the carbon-14 decays into nitrogen-14; half will do so after about 5,730 years (this is the isotope's half-life). After about 60,000 years, all of the carbon-14 will be gone.

To understand the researcher's approach, it is important to know that nitrogen has two stable isotopes, two different states ...

Naturally-occurring stable isotopes of water and other substances are used to trace the origin, history, sources, sinks and interactions in water, carbon and nitrogen cycles. Stable isotopes can also ...

Stable isotopes have helped uncover migratory routes, trophic levels, and the geographic origin of migratory animals. They can be used on land as well as in the ocean and have revolutionized how ...

This Section implements all activities of the IAEA's Water Resources Programme, which promotes and transfers know-how on the use of isotope hydrology as an effective ... of hydrogen (tritium), carbon ...

Limnology and Oceanography, Vol. 59, No. 5 (2014), pp. 1493-1509 (17 pages) We used δ15N-nitrate ( NO 3 − ) and δ 18 O-NO 3 − to unravel the provenance and fate of NO 3 − in a groundwater-fed estuary.

Elizabeth D. Hetherington, Robert J. Olson, Jeffrey C. Drazen, Cleridy E. Lennert-Cody, Lisa T. Ballance, Ronald S. Kaufmann, Brian N. Popp https://www.jstor.org ...