On Earth, natural rubidium comprises two isotopes: 72% is a stable isotope 85Rb, and 28% is slightly radioactive 87Rb, with a half-life of 48.8 billion years-more than three times as long as the estimated age of the universe. (wikipedia.org)
This study aims to evaluate the potential of a non-invasive breath test based on stable isotopes for evaluation of impaired digestion and absorption of sucrose in EE. (bvsalud.org)
Concentrate2
During fractional crystallization, Sr tends to concentrate in plagioclase, leaving Rb in the liquid phase. (wikipedia.org)
In case of zinc flotation with PF reagent concentration 55 g/t and foamer T-80 - 20 g/t zinc concentrate with zinc content of 56.3 % at recovery of 93.6 % was obtained. (kims-imio.kz)
Radioactive1
The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology. (wikizero.com)
Water1
AB - The occurrence of chlorinated ethene transformation in a streambed was investigated using concentration and carbon isotope data from water samples taken at different locations and depths within a 15 x 25 m study area across which a tetrachloroethene (PCE) plume discharges. (nih.gov)