These are low burst results but samples have lots of pinholes on them many of which are on the edges.
I also checked porosity of the wafers 338 and 340. They indeed have porosities close to 7%.
Wafer 340 (0,5) 0.0656 porosity
Our new diffusion chamber is finally here. Take a look at the photos first – in our next group meeting you can see the real thing. Today I will test its usability and reliability. Please keep in mind this is only the prototype, there must be upside space for improvement.
We’re submitting the following paper to Separations and Purifications within the next two weeks: model-paper model supplement Below are the (almost) final versions of the figures from the paper. Figure 1: Schematic of Particle Distribution for Particles Rejected by Membranes The distribution is a quasi-equilibrium between convection towards the membrane and back diffusion, which is…
Recently, Jim has purchased a Makerbot 2x printer for our group. I’ve spent the last few weeks printing and debugging. It has the capability to print many different types of material, along with 2 separate nozzles. I have been able to get many fine prints done with ABS plastic, and I’ve put together a basic…
A couple weeks ago when I presented at lab meeting, Angela Glading suggested that I look at epithelial cell vacuolization on transwells. This was in order to determine if vacuole formation was endothelial cell-specific. If I’m remembering correctly, the rationale was that the vacuole-less fibroblasts I showed were not contact-inhibited cells and thus not a…
In the previous post, I used a compound error bar that took into account both image and operator variability. While that seemed to make things a little better, we were still having a problem with w705. I reprocessed a couple extra images from the TEM gallery, and added the differences to the image variability part…
I tested four membranes with different porosities today, including one that had been carbonized. Here are the pore size distributions with TEM micrographs. I ozone treated all the samples prior to running the experiments, including the carbonized sc 582. I expected some of the carbon ring to oxidize, which TEM confirms: It would appear that…