In physics, natural abundance (NA) refers to the abundance of isotopes of a chemical element as naturally found on a planet. The relative atomic mass (a...

H NMR for materials of natural abundance. Singleton and coworkers demonstrated the capacity of 13 C NMR based natural abundance KIE measurements for studying...

elements are Natural abundance, the natural prevalence of different isotopes of an element on Earth Abundance of elements in Earth's crust Abundance (novel)...

The abundance of the chemical elements is a measure of the occurrence of the chemical elements relative to all other elements in a given environment....

3He fraction. 3He is also present in the Earth's atmosphere. The natural abundance of 3He in naturally occurring helium gas is 1.38×10−6 (1.38 parts...

Relative abundance can refer to Relative species abundance in ecological communities. Natural abundance of isotopes of a chemical element in nature. This...

more common protium has no neutrons in the nucleus. Deuterium has a natural abundance in Earth's oceans of about one atom of deuterium among every 6,420...

decays. Iridium-192 is normally produced by neutron activation of natural-abundance iridium metal. Iridium-192 is a very strong gamma ray emitter, with...

Greece of earth, water, air or fire Natural abundance, the relative amounts of isotopes of a chemical element Abundance of the chemical elements, the relative...

more than 12 times the mass of all the heavier elements combined. Its abundance is similar to this in both the Sun and Jupiter, because of the very high...