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.
Save. A glucose serum test determines the amount of sugar in your blood. A low glucose serum level can be a sign of a condition called hypoglycemia.1  What Causes Low Creatinine Levels? 2  Blood Sugar Levels & What They Mean. glucose serum test determines the amount of sugar in your blood. A low glucose serum level can be a sign of a condition called hypoglycemia. 1  What Causes Low Creatinine Levels?