Clinical chemistry the denser blood cells and platelets to the bottom of the centrifuge tube, leaving the liquid serum fraction resting above the packed cells. This initial step before analysis has recently been included in instruments that operate on the "integrated system" principle. Plasma is in essence the same as serum, but is obtained by centrifuging the blood "without" clotting. Plasma is obtained by centrifugation "before" clotting occurs. The type of test required dictates what type of sample is used. A large medical laboratory will accept samples for up to about 700 different kinds of tests. Even the largest of laboratories rarely
Blood, Sweat and T-shirts Blood, Sweat and T-shirts Blood, Sweat and T-shirts is a British TV documentary series, broadcast in 2008 on BBC Three. The series followed six British fashion consumers aged between 20 and 24 as they travelled to India to live and work alongside Indian garment workers, making clothes destined for sale in British high-street stores. The series was nominated in the Best Factual Series category at the 2009 BAFTA Television Awards. The series was followed by "Blood, Sweat and Takeaways" in 2009, which focused on the food production in Asia, and "Blood, Sweat and Luxuries" in 2010, which focused on the