Because the factor is derived from blood pooled from thousands of donors, the rate of infection was staggering.
Gamma globulin, which is used to provide temporary protection against some infections, is derived from blood donated by thousands of people.
Opponents are pressing for what they call an ethically responsible alternative: research on adult stem cells, which are derived from blood, bone marrow and various other tissues.
If successful, the takeover would propel CSL to the top spot in the $15 billion global market for medical treatments derived from blood plasma, ahead of Baxter International.
Adult stem cells, which are derived from blood and bone marrow, are also promising, and Mr. Bush supports research in this area.
A limitation of our approach was to combine coverage data from tumor with normal coverage data derived from blood DNA samples.
It is derived from blood plasma and resembles but is not identical with the cerebrospinal fluid of the brain and the aqueous humour of the eye.
The potash, however, was contaminated with 'animal oil' derived from blood, and the result was a deep blue — one of the first modern synthesized pigments.
Two groups were given emergency boluses of 20 to 40 millilitres of fluid per kilogram of bodyweight – half of them saline and half albumin (derived from blood products) to see whether there was any difference.
Opponents of the research have argued that it is not necessary to experiment with embryonic stem cells because "adult" stem cells derived from blood, umbilical cords and placentas, bone marrow, fat and other tissues also show promise.
At that workshop, opponents, including some scientists, argued that studying embryonic stem cells was not necessary because an alternative existed: so-called adult stem cells, which are derived from blood, bone marrow, fat and other tissues.
