Absolute zero is the coldest possible temperature, at which no heat is left in a substance and its particles display no motion whatsoever. Absolute zero is equal to 0 K on the Kelvin scale, which is... Absolute zero is the coldest possible temperature, at which no heat is left in a substance and its particles display no motion whatsoever.
Serum is plasma that has been allowed to clot. It is prepared in the same way as plasma; however, the blood is collected into a tube with no anticoagulant. While spinning in the centrifuge, the clot moves with the cells to the bottom of the blood collection tube, leaving the serum on top.
Serum proteins are classified as albumin or globulins. Albumin is the protein of highest concentration in the serum. It carries many small molecules, but is also important for keeping fluid from leaking out from the blood vessels into the tissues. Globulins are divided into alpha-1, alpha-2, beta, and gamma globulins.