Archive: 08/7/2008

A positive-feedback system ensures that cells divide

( -- In the life of every cell, there’s a point of no return. Once it enters the cell cycle and passes a checkpoint known as “Start,” a cell will follow the steps it needs to divide — no matter what changes ...

Aug 07, 2008 4.5 / 5 (8) 0

Scientists create 20 disease-specific stem cell lines

( -- Harvard Stem Cell Institute researcher George Q. Daley, associate director of the Stem Cell Program at Children's Hospital Boston, has with HSCI colleagues Chad Cowan and Konrad Hochedlinger of Massachusetts ...

Aug 07, 2008 4.8 / 5 (6) 0

Putting microRNAs on the stem cell map

Embryonic stem cells are always facing a choice—either to self-renew or begin morphing into another type of cell altogether. It's a tricky choice, governed by complex gene regulatory circuitry driven by a handful of key ...

Aug 07, 2008 5 / 5 (2) 0

Clean 3-way split observed

In chemistry as in life, threesomes are not known to break up neatly. And while open-minded thinkers have insisted that clean three-way splits do happen, nobody had actually witnessed one – until now.

Aug 07, 2008 4.2 / 5 (11) 0

Forward step in forecasting global warming

Arizona State University researchers have made a breakthrough in understanding the effect on climate change of a key component of urban pollution. The discovery could lead to more accurate forecasting of possible global-warming ...

Aug 07, 2008 3.1 / 5 (33) 16