For this purpose, they must be separated using highly sophisticated techniques, such as mass spectrometry. While deuterium H-2, an isotope twice as heavy as hydrogen, is predominantly used in ...

Human ancestors like Australopithecus – which lived around 3.5 million years ago in southern Africa – ate very little to no ...

1403-1411 (9 pages) This study investigated the bulk nitrogen isotopic composition and fractionation of marine and freshwater cyanobacteria growing at the expense of atmospheric dinitrogen gas (N₂) or ...