W509X, with single 100um by 1000um slits, was tested for air permeability and burst pressure. Prior to testing, I inspected all membranes for pinholes.; every sample had pinholes on the membrane perimeter, as shown below. The first two images are…
Tag: karl
W565 Air Permeability and Burst Pressure
I tested four samples (-1,1); (-1,2); (-1,3); and (-2,4) for air permeability and burst pressure. The first three samples showed no measurable air permeability for three attempts each. The sample from position (-2,4) did have a very small air permeability…
Desalting with Dialysis Cassettes
One area of use to explore for the membranes is desalting, the removal of salts from solutions (such as those containing proteins). Two dialysis products made my Thermo/Pierce were tested to develop a protocol and test manufacturer’s claims. These products…
HUVEC Adhesion with controls (repeat)
HUVEC adhesion was tested on different substrates. This time solid chips w/o membrane slits were used and expected results were obtained. I think from all the adhesion studies done, it could be concluded that initial adhesion on pncSi is as…
HUVEC Adhesion with Controls
HUVEC adhesion was measured on glass, tissue culture plastic, and pnc-Si, with poly-lysine coated plastic and teflon coverslips as positive and negative controls. Adhesion on pnc-Si was low, this could be due to cells being lost through broken slits or…
Fibroblast adhesion study using controls
Fibroblast adhesion experiment was done using poly-lysine coated plastic and teflon coverslips as positive and negative controls repectively. Poly-lysine is a polypeptide that gives the cells a sticky surface to adhere to. Teflon coverslips are used as negative control because…
Fibroblast Adhesion Update
Four more adhesion experiments were carried out and the results can be seen in the following charts. Based on the average of the four trials it can be elucidated that the initial adhesion (after ~7 hours) is pretty much the…
Cell Adhesion Testing 6/3-6/4
Two more adhesion tests were run recently, one on Tuesday and one on Wednesday. For both tests cells were imaged after five hours. Fibroblast trial 3 was the first test where the optimal cell density (assuming 100% of cells are…
pH and Salt test on pncSi
We have been wondering about the reason for discoloration for a while. This could be due to the pH of the solution or the concentration of the salts in the solution. To narrow down our vision on this, first we…
HUVEC and Fibroblast Growth Summary
Thus far three HUVEC and two L13T3 growth tests have been conducted on substrates including glass,pnc-Si, tissue culture plastic, and untreated plastic. Only one test with untreated plastic has been run for each cell type. Cells on Si samples are…
