The women wore white, symbolising pure intentions, and carried gladioli, a single stem each.

ECONOMIST: Laura Poll��n

He is working with Quake to create a thumb-size chip that can automatically catalog the genes and proteins inside a single stem cell.

FORBES: Magazine Article

The doctors at Hopkins were concerned that Zoe might have inherited her mother's genetic vulnerability to the extreme chemotherapy needed to wipe out every single stem cell in preparation for the new marrow.

FORBES: Two Girls Two Countries One Cancer

In addition to the extremely expensive process of cloning, for each patient you have to culture stem cells and reliably turn them into the tissue you want with 100% efficiency, so you don't get a single left over stem cell that will cause tumors.

CNN: Human stem cell cloning: 'Holy Grail' or techno-fantasy?

But the real problem behind employees' insecure practices, says Trend Micro's Perry, doesn't stem from any single trend.

FORBES: Accounting For Human Error

The haematopoietic stem cell transplant unit, with 10 single en-suite rooms, has been built in the hospital's former Bracken ward.

BBC: Derriford Hospital's ?3m stem cell isolation unit praised

They believe a single type of cell may be cancer's main growth engine:mutant stem cells that, though barely present, spawn other cells that then spark growth.

FORBES: Cancer Killer

Britain, whose troops are facing the rebel movement in Sierra Leone, is particularly keen to stem the trade from that country, where at present the government controls not a single diamond.

ECONOMIST: How to stop diamonds paying for nasty African wars