The natural abundance of soil nitrogen (N) stable isotope (δ15N) is a good proxy indicating the integrative soil N cycling processes and fluxes over a long time scale.

The nitrogen found on Earth doesn’t match the nitrogen found in the Sun or in the tails of comets. Those sources have nitrogen isotope fractions that differ from those on Earth.

Since ammonia is the major carrier of nitrogen in a comet, it is necessary to clear it from the relative abundance of its isotopes to understand how 15 NH 2 separates in cometary molecules ...

The nitrogen abundance of the silicate Earth is a result of both early evolution and late-stage accretion, but the contribution of late-stage accretion to the abundance of other volatiles is limited.

Most nitrogen comes as the isotope nitrogen-14, with seven protons and seven neutrons. But physicists say they have glimpsed a far more elusive variant with just two neutrons.

Through experiments performed in the Center for Isotope Geochemistry, the goal of the lab is to analyze nitrogen in minuscule quantities. The center houses an isotope ratio mass spectrometer, an ...

Scientists discovered hints of the new isotope, called nitrogen-9, by smashing beams of oxygen isotopes into beryllium atoms in the U.S. National Superconducting Cyclotron Laboratory.

In a separate study, another research team led by Bernard Marty of Nancy University in France analyzed the nitrogen isotopes in Genesis' samples. (Nitrogen has two stable isotopes: nitrogen-14 ...

In our study we examined stable carbon and nitrogen isotopes in polar bear bone collagen. The polar bears were all from the Lancaster Sound sub-population and spanned the last 4,000 years.