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.
The other type of rubbing alcohol consists of 97.5-100% denatured ethyl alcohol or ethanol with water. Ethyl alcohol naturally is less toxic than isopropyl alcohol. In fact, it is the alcohol that naturally occurs in wine, beer and other alcoholic beverages.