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.
Scientific texts indicate that this occurs because ethyl alcohol causes proteins to coagulate. Essentially, the structure of alcohol allows it to get inside these small organisms and stop them from growing. Other forms of alcohol, such as methyl alcohol, are not meant to be used for general antiseptic purposes.This is a much stronger solvent that is designed for industrial use. One of the more interesting facts uncovered about alcohol is that the strongest solutions do not have the best antiseptic properties.In fact, applying 100 percent alcohol for antiseptic purposes may cause bacteria and other tiny organisms to build a protective shell of protein.This prevents the alcohol from getting into the interior of the organism.n fact, applying 100 percent alcohol for antiseptic purposes may cause bacteria and other tiny organisms to build a protective shell of protein. This prevents the alcohol from getting into the interior of the organism.