CPB mechanically circulates and oxygenates blood for the body while bypassing the heart and lungs. Types of additives include metal deactivators, corrosion inhibitors, oxygenates and antioxidants. In this way, hydroformylation is a gateway from alkenes to oxygenates. The patient is connected to a heart-lung machine, which circulates and oxygenates blood. Some oxygenates other than ethanol are approved. This Fe=O center then oxygenates the substrate by an oxygen rebound mechanism. Stirring oxygenates the blend and ensures that all the beans are utilized. CPR oxygenates the body and brain for defibrillation and advanced life support.