Geologic records reveal that magnetic field strength and oxygen levels rise and fall together, implying deep-Earth processes ...

A giant, gaping hole that opened up in the Sun's atmosphere has been identified as the source of a surprising abundance of a rare isotope of helium. In late October 2023, the Sun was recorded belching ...

SAN ANTONIO — April 9, 2025 —The NASA/ESA Solar Orbiter recently recorded the highest-ever concentration of a rare helium isotope (3He) emitted from the Sun. A Southwest Research Institute-led ...

Natural abundance isotope techniques offer a key to better deciphering the impact of microplastics on the ... Makabe A., Yano M., Oshiki M., Kindaichi T., Casciotti K. L., et al. (2019). Dual nitrogen ...

Rather than being a snapshot of dietary information, as is the case with analysing faecal or stomach content, the isotope ratios of foods are reflected in the biological tissues of their consumers.

When animals digest food, biochemical reactions favor the "light" isotope of nitrogen (14 N). Consequently, the degradation products that are produced in their body contain high proportions of 14 N.

New research published in Science suggests that Australopithecus, a genus of early human ancestors, primarily consumed plants, with minimal evidence of meat consumption.This study analyzed nitrogen ...

Nitrogen isotope analysis. The higher the ratio of the nitrogen isotopes 15 N to 14 N in a sample, the higher the animal's position in the food chain.

A USTC-led study reveals that both early and late stages of planetary evolution are key to understanding nitrogen abundance in Earth’s silicate, offering new perspectives on the origin of Earth’s ...

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.

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 ...