Serum-separating tube Serum-separating tube Serum-separating tubes, also known as serum separator tubes or SSTs, are used in medical clinical chemistry tests requiring blood serum. SSTs are sometimes called "marble-top tubes," "tiger-tops," or "gold-topped tubes", referring to the stoppers which are either gold, red with a gold ring on top, or marbled red and grey. Marble-top tubes are also referred to as "tiger-tops" in some clinics. SPS tubes have a paler colour, sometimes leading confusion; these are known as "yellow tops" not "gold". Trademarked versions include Covidien "Corvac" tubes. They contain a special gel that separates blood cells from serum, as well as
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