The last post I made about the BSA/DDM separations using “treated” and “untreated” SC269 samples explained a problem I was having in which the initial retentate drop was diffusing around the edge of the sample chip. It seems that SC269…

Yesterday I posted results of a diffusion experiment using rhodamine and fluoroscein that showed the pores in SC269 are open both before and after treatment in the UV-Ozone system. I set up another diffusion experiment to test “treated” and “untreated”…

We haven’t talked much about the optical properties of pnc-Si, but I thought it would be good to share some of the index and dispersion data I’ve collected using the ellipsometer.  Below are plots of index of refraction (n) and…

This is a follow-up post to “Protein Assay Test.” I realized that I never posted the final stag of my experiments, in which I finally got BSA to go through the membranes. In “Protein Assay Test,” I described several experiments…

Yesterday I posted my results from a BSA diffusion experiment using “treated” and “untreated” SC269 samples. To ensure that the pores in SC269 are indeed open I took a step backwards and set up a diffusion experiment using small dye…

As I mentioned in the meeting this morning the SC267 samples have run out so I have begun testing SC269 for use in my experiments. This post pertains to a BSA diffusion experiment that I set up yesterday and allowed…

The following is a plot of rhodamine diffusion for the experimental system at various time point: In this figure, the rhodamine approaches equilibrium, as defined as a filtrate/retentate value of 1.  The 9x well chips have a larger active area…

Hi all, this is Henry. Leeanna Hyacinth, an undergraduate student from the McNair program, has recently completed a joint project between the Waugh, Palis, and McGrath Lab to create a bioreactor to amplify the number of mature red blood cells.…

I am having some problems with my electroosmosis device and I was hoping that people with more knowledge about the TEM chips might have some suggestions.  For these trials, I used membranes from a wafer labeled 412-S.  I am still…

Due to the discrepancies between the 1D model and experimental runs with rhodamine, I have switched over to using COMSOL to solve for a 3D model.  In this system, 200×200 um membrane squares with a 45 degree etch separate the two…