In an attempt to minimize flow due to salt gradients, we ran an experiment in which an intentional gradient was used to set up a slight counterflow from the filtrate to the retentate.  This was accomplished by having a 55mM…

Since the last post we have been working on obtaining replicates with wafer 101 chips.  The goal was to show salt dependent filtration changes.  These chips were different from the ones originally used in that the pores were much smaller…

I ran new experiments over the weekend in which I tested NaCl at 10, 25, 60, and 155mM.  I also ran filtrations in the presence of 10mM LiCl and 10mM CsCl.  These experiments were performed with chips from wafer #…