Tossup
This substance is layered over Ficoll–Paque (“FYE-cull-pack”) in a protocol for isolating PBMCs that employs a density gradient. This substance is treated with EDTA or heparin to stabilize it for analysis. During World War II, Edwin J. Cohn devised a purification protocol for extracting albumin from this substance. A thin layer of this substance is spread on a glass slide and examined under a microscope in a “peripheral smear.” This substance is centrifuged to fractionate it into two layers separated by a buffy coat and can be analyzed to calculate hematocrit. For 10 points, a fingerprick can be used to extract what substance composed of leukocytes, erythrocytes, and plasma? ■END■
ANSWER: blood [accept blood plasma; accept blood serum; accept red blood cells; accept white blood cells; accept blood fractionation; accept peripheral blood smear or blood film; accept peripheral blood mononuclear cells; prompt on serum; prompt on plasma before read]
<Editors, Biology>
= Average correct buzz position
Buzzes
| Player | Team | Opponent | Position | Value |
|---|---|---|---|---|
| Abbie Isabel | Edinburgh A | Sheffield B | 101 | 10 |
Summary
| Tournament | Edition | TUH | Conv. % | Neg % | Average Buzz |
|---|---|---|---|---|---|
| UK (North) | UK | 1 | 100% | 0% | 101.00 |
| Southern California | US | 1 | 100% | 100% | 100.00 |
| Eastern Canada (2) | US | 1 | 100% | 0% | 45.00 |
| Upper Mid-Atlantic | US | 2 | 100% | 0% | 55.50 |
| Northeast | US | 4 | 100% | 50% | 87.75 |
| Southeast | US | 1 | 100% | 0% | 38.00 |