If the shaft is therefore to revolve stably this force must be balanced at any instant by the elastic resistanc of the shaft to deflexion.
However, we have now extended these studies to use retroviral gene transfer methods to stably transduce macrophage precursors with these DNA constructs.
The resulting protein was very pure and could be stably stored at +4 C for months in 10 mM sodium phosphate pH 6.5.
This allows them to hover in place, maneuver in tight spaces, and move stably at much lower speeds.
The elastic resistance evoked by this deflexion is proportional to the deflexion, so that if c is a constant depending upon the form,, material and, method of support of the shaft, the following equality must hold if the shaft is to rotate stably at the stated speed- -~ (y+e)ai=cy, from which y=Wafe/(gcWa2).