isotopic contamination
51Isotopes of phosphorus — Although phosphorus (P) has multiple isotopes, only one of these isotopes is stable 31P; as such, it is considered a monoisotopic element. Standard atomic mass: 30.973762(2) uRadioactive isotopes of phosphorus include: * 32P; a beta emitter (1.71 …
52Pilbara craton — The Pilbara craton (the Pilbara province in northwest Western Australia), along with the Kaapvaal craton (the Kaapvaal province of South Africa) are the only remaining areas of pristine Archaean 3.6 2.7 Ga crust on Earth. Similarities of their… …
53Cameroon line — Map of the Gulf of Guinea, showing the chain of islands formed by the Cameroon line of volcanoes. The Cameroon line is a 1,000 km (620 mi) chain of volcanoes.[1] It includes islands in the Gulf of Guinea and mountains that extend along… …
54Abiogenesis — Primordial soup redirects here. For the board game, see Primordial Soup (board game). Origin of life redirects here. For views on the origins of life outside the natural sciences, see Creation myth. Pre Cambrian stromatolites in the Siyeh… …
55igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …
56Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
57Marine terrace — A marine terrace, coastal terrace[1], raised beach or perched coastline is a relatively flat, horizontal or gently inclined surface of marine origin[2], mostly an old abrasion platform which has been lifted out of the sphere of wave activity… …
58Claude Boutron — est professeur de Physique à l Université Joseph Fourier de Grenoble. Né le 26 juin 1947, il mène ses recherches au sein du Laboratoire de glaciologie et géophysique de l environnement (LGGE CNRS/UJF). Spécialiste de la géochimie de l atmosphère …
59Chocolate — For other uses, see Chocolate (disambiguation). Chocolate most commonly comes in dark, milk, and white varieties, with cocoa solids contributing to the …
60Technetium — molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re …
