Scientists have measured oxygen isotopes in solar wind, captured by NASA's Genesis mission, to infer the isotopic composition of the sun, and, by inference, the solar system as a whole. An ...

ONE of the problems in high-molecular-weight mass spectrometry is to establish unambiguously the definite mass to be assigned to the fragmentation peaks in the higher mass (200–800) range. A suitable ...

Damon writes, “This distribution of ‘isotopic peaks’ on my calf is what a peptide of mass 2,005 Daltons looks like in a high-resolution mass spectrometer. That peak distribution is due to the relative ...