I confess that I didnât know the geological conventions for abbreviating time until I started teaching the geology writing class and looked them up. (Thatâs despite having published a paper on argon-argon geochronology.
Iontophoresis is a physical process in which ions flow diffusively in a medium driven by an applied electric field.ontophoresis of acetylcholine is used in research as a way to test the health of the endothelium by stimulating endothelium-dependent generation of nitric oxide and subsequent microvascular vasodilation.
1. radioisotope-a radioactive isotope of an element; produced either naturally or artificially. tracer - (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes.isotope-one of two or more atoms with the same atomic number but with different numbers of neutrons.. radioisotope-a radioactive isotope of an element; produced either naturally or artificially. tracer - (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes.