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
New Blood (Blood, Sweat & Tears album) Bargeron on trombone and Lou Marini on sax." Album - Billboard (United States) New Blood (Blood, Sweat & Tears album) New Blood is the fifth album by the band Blood, Sweat & Tears, released in 1972. With David Clayton-Thomas leaving as lead vocalist to pursue a solo career after the release of "BS&T 4", a nearly wholesale personnel change occurred for "New Blood". Difficulties had arisen inside the group between its pop-rock and jazz factions, with Clayton-Thomas choosing to leave in early January 1972, along with founding member Fred Lipsius. Clayton-Thomas was briefly replaced by Bobby Doyle, and a photo