Surgicel is a hemostatic agent (blood-clot-inducing material) made of an oxidized cellulose polymer (the unit is polyanhydroglucuronic acid), manufactured by the Ethicon subsidiary of Johnson And Johnson. It was introduced into clinical practice in 1947. It is used to control post-surgical bleeding.
Multi Stage: (More than one level of heating or cooling) Multi Stage heating means that you have two levels of heat in your home. You will perhaps have a furnace and another method of heat like a solar panel. The second level of heat is commonly referred to as an emergency heat setting.
Multi-stage furnaces may begin at the highest blower level possible, but once enough heat is built up they will only push small amounts of heat. Multi-stage furnaces are premium furnaces. Their efficiency (AFUE) is typically above 94%, and they are able to extract heat from the exhaust gases, by reusing them (they are of condensing type). The really important, and what makes multi-stage furnaces special, is their flexibility.