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.
Isopropyl alcohol can be used as a preserving agent for biological specimens. It's often used as a way to dilute test samples, and can be used as a reaction medium for a number of chemical reactions. It can also be used in place of ethanol, another type of alcohol, to extract DNA from a cell.