0 one of two or more atoms of a particular element that have the same number of protons, but different numbers of neutrons in their nuclei -- isotop
radioactive/stable isotopes.
We see that fully closed pore graphites prevents this contribution to hydrogen isotope inventory because there is no continuous surface leading deep into the graphite.
Structure of river food webs revealed by stable isotope ratios.
Disentangling a rainforest food web using stable isotopes: dietary diversity in a speciesrich ant community.
All aspects are covered: mineralogy, major- and trace-element compositions, and isotope (radiogenic and stable) geochemistry.
The processes as monitored by stable isotopes seem too slow to generate distinct glacial periods.
These differences are also consistent model predictions of sulfur isotope fractionations produced by biosynthetic networks.
We have recently developed an isotope pulse-chase experiment using quantitative mass spectrometry that permits assembly kinetics to be measured in real time.
When using carbon, however, the carbon 11 isotopes produced by fragmentation are positron emitters.
