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 & Tools strong job they did. The winner of the public vote is then announced as the Red Team, who take home the $50,000 grand prize. Blood, Sweat & Tools Blood, Sweat & Tools is a Canadian television series broadcast on Discovery Channel. The series is hosted by Helder Brum, Rob Koci and Hillary Manion, who also act as the challenge judges and expert advisers to the contestants. The series is the successor of "Canada's Worst Handyman", and has a broadly similar format, but with an emphasis on rewarding competent handiwork rather than finding the nation's worst handyman. The couples are divided