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.
Phonophoresis is only one of the two ways in which a medication can be driven into the skin, the other being iontophoresis. Phonophoresis has no hazard of skin damage, although minor skin discoloration may develop following pro- longed use. Due to deeper penetration, periosteal burns may result with phonophoresis if precautions are not taken. Patients receiving iontophoresis face the possibility of an electrical burn with direct current. Whereas ultrasound drives the whole molecule of medication to the tissue, iontopho-