Sentences with phrase «as picograms»
The plated cells were then dissociated and counted using a hemocytometer in order to express results as picograms or nanograms of growth factor produced per day per million cells.
http://journals.plos.org/ Not exact matches
The rodents were then scanned with the Rice lab's custom - built optical device to detect the faint emission signatures of as little as 100 picograms of nanotubes.