1. The UCLA machine is the brainchild of isotopic chemist Mark Harrison. 2. Isotopic compounds play an important role as photochromes, described below.3. The diet of the victims would also affect their isotopic signature. 4. Determining the time since water infiltrated usually involves analyzing isotopic signatures. 5. The study includes isotopic and elemental proxies, sometimes termed sclerochemistry. 6. The isotopic composition of ikaite and the pseudomorphs is actively studied. 7. The categories of study mentioned before this are classic isotopic applications. 8. Where R _ { std } is a standard isotopic ration. 9. The isotopic effects are negligible for xenon but marked for chlorine. 10. Isotopic abundances indicate processes over the history of the Solar System.