Fetal bovine serum and virus, endotoxin, haemoglobin, IgG and total protein assays. Ethical questions have been raised regarding the blood collection process due to the potential suffering caused to the fetus. Although anoxia or active slaughter could be used to induce unconsciousness or death prior to serum harvesting, exposure of live unborn calves to oxygen can cause them to gain awareness before being killed, resulting in active debate about the ethics of harvesting serum. Fetal bovine serum is commercially available from many manufacturers, and because cells grown in vitro are highly sensitive, customers usually test specific batches to check for suitability for their
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