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.
Step One: Determine what system you have. Single Stage: (Traditional gas heat and electric AC gystems) Single-stage heating means that your furnace only has one level of heat output. An example would be if you only have a gas, forced air heater, or if you have an electric AC system with a separate heating system.