SR. Srr1111 31 Oct 2016. A drug's half-life is the amount of time for the concentration of drug in the body to be reduced by half. A drug's plasma half-life is the amount of time required for the drug to be eliminated from the plasma. The connection between the two is considering the amount of drug concentration to plasma ratio, which can vary. Study with Quizlet and memorize flashcards containing terms like Antigen, Centrifuge, Coagulation and more. Get insights on the difference between Serum and blood plasma. The basis of comparison include: discovery, description, storage lifespan, composition, function, water content, structure of cell, isolation procedure, fibrinogen, extraction procedure and density including the similarities. The Difference Discovery In 1918 Gordon R. Ward discovered the use of plasma for blood transfusion purposes The serum iron test is a safe and straightforward way to test the level of iron in the blood. While normal ranges can vary between people, a high or low result can help a doctor determine the Minimum Volume. 1 mL plasma or serum. Additional Information. Note that whole blood is recommended as the optimum specimen type for Vitamin B1 (thiamine) analysis because the biologically active form of thiamine is found in erythrocytes in the form of thiamin diphosphate (TDP), which is found in very low concentrations in plasma or serum. Why the Test is Performed. PTH is released by the parathyroid glands. The 4 small parathyroid glands are located in the neck, near or attached to the back side of the thyroid gland. The thyroid gland is located in the neck, just above where your collarbones meet in the middle. PTH controls calcium, phosphorus, and vitamin D levels in the blood. The coagulated component settles to the bottom, whereas serum is collected on the top. Plasma is extracted by the process of centrifugation of blood to which an anticoagulant has been added. Volume. Serum comprises only a small percentage of the total volume of blood. Plasma comprises 55% of the total blood volume. The PST™ tube is used for STAT general chemistry orders and the SST™ tube is used for more routine chemistry blood tests. The blood sample in an SST™ tube has to clot before the serum can be used. This usually takes about 30 minutes. The PST™ tube offers a whole blood specimen that can be used almost immediately, which is why it is used Artificial blood is a product made to act as a substitute for red blood cells. While true blood serves many different functions, artificial blood is designed for the sole purpose of transporting oxygen and carbon dioxide throughout the body. Depending on the type of artificial blood, it can be produced in different ways using synthetic Plasma VS Serum Differences and Comparison Guide. by Arshad. The difference between plasma and serum is that is that Plasma has clotting factors in it while Serum does not contain clotting factors. Clotting factors are those factors that leads our blood to clot. Also, serum and plasma are present within the blood stream. H0Ss9.