OxyContin vs. Oxycodone. The active ingredient in OxyContin is oxycodone but OxyContin (a brand name derived from oxycodone continuous) has a time-release mechanism, which means the drug is released in the body over a period of time and patients have to take the drug less often.
Transplanting organs, tissues or cells from one person to another. Compare with autologous transplantation. Amniotic fluid stem cell. A type of cell derived from amniotic fluid, which is the liquid that surrounds a developing fetus in the amniotic sac.
1 October 2006: Scientists at Newcastle University in England become the first to differentiate umbilical cord blood stem cells into liver cells.  January 2007: A research team led by Anthony Atala discovers a new type of stem cell, amniotic fluid stem cells (AFS cells). These stem cells are found to be pluripotent in nature.