Wind turbines convert wind energy to electricity for distribution. Conventional horizontal axis turbines can be divided into three components: 1  The rotor component, which is approximately 20% of the wind turbine cost, includes the blades for converting wind energy to low speed rotational energy.
Blood Banking & Donation. Blood banking refers to the process of collecting, separating, and storing blood. The first U.S. blood blank was established in 1936. Today, blood banks collect blood and separate it into its various components so they can be used most effectively according to the needs of the patient.
Freezing extends the dating period or shelf-life for these blood units. How long can frozen blood be stored? Frozen blood can be stored for 10 years from the date of blood collection. How is blood kept âaliveâ during the freezing process? A special cryoprotectant chemical is added to the blood cells. This chemical, glycerol, permeates the red blood cell membrane so that there is about as much glycerol inside the cell as outside the cell, and it displaces much of the cellâs water.