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.
As its name suggests, a serum iron test measures how much iron is in your serum. Serum is the liquid that is left over from your blood plasma when the red blood cells and the clotting elements have been removed. This test can help your doctor figure out if there is a problem with your iron levels.Especially high or low iron levels can cause a variety of vague symptoms, such as fatigue, weakness, difficulty concentrating, and moodiness. The serum iron test can reveal both unusually low and abnormally high blood iron levels.his test can help your doctor figure out if there is a problem with your iron levels. Especially high or low iron levels can cause a variety of vague symptoms, such as fatigue, weakness, difficulty concentrating, and moodiness. The serum iron test can reveal both unusually low and abnormally high blood iron levels.