MRI vs. MRA. An MRA, or magnetic resonance angiogram, is a type of MRI scan that uses MRI's magnetic fields and radio waves to produce pictures of blood vessels inside the body, allowing doctors to locate problems that may cause reduced blood flow.
Best Answer: Ethyl alcohol, at the concentrations used in most antibacterial preparations, kills bacteria by disrupting membranes and by denaturing proteins. Ethylalcohol is miscible in water (that is, completely soluble). But ethyl alcohol can also dissolve in the membranes of cells.
Also, one thing that you need to remember is that isopropyl alcohol requires around 10 minutes of time on the skin's surface to kill bacteria, giving ethyl alcohol an advantage over isopropyl alcohol. Hand sanitizers will not get through bodily fluids, dirt, blood or other grime to kill germs.