Similar Posts
No edge effect with NG10815 cells
I’ve repeatedly seen cytotoxic edge effects when I grow bEnd3 cells on the bottom of PET membrane transwells. Here’s a post of images. I’m getting closer to co-cultures of bEnd3 and NG108-15 cells on opposite sides of membranes and I’ve been investigating the optimal arrangement of the different cell types (bend3 on top or bottom?). …
Electro-osmosis with polymeric membranes
The Burns-Zidney paper uses streaming potential to measure the zeta potential of polymeric membranes. This means that polymeric membranes should also be capable of performing electro-osmosis, essentially the opposite of streaming potential. For more on this, I have a knowledge page that I’m working on entitled Electrophoretic Cell. I punched out two 30kD cellulose membranes…
More excitement on o-ring position and transport
In my last post, I concluded that switching the o-ring position from below the membrane to the top in the sepcon produced no leaks. The reason for this switch was to reduce the 1mm “dead-space” (created by the o-ring) that adds to the unstirred water layer (UWL). The next thing that Barrett and I looked…
Barcikowski Particles Revisited
The following are TECAN spectrum of the filtrates (and a spectrum of unconjugated peptide) for a series of sequential separations performed on the Barcikowski peptide (CE12W) using 10, 20, and 30nm cutoff Sepcons performed last weekend. Note that all of this data was taken with the quartz cuvette not inserted fully into the TECAN as…
Using UV Ozone to Bond PDMS to Glass
ByMike HI talked with Jim last Friday about a second possible dialysis system using PDMS bound to a glass cover slip. I made a batch of PDMS and let it cure at room temperature over the past few days. Jim had suggested I try bonding the PDMS to a glass cover slip using the UV/Ozone system…
Attempt at UV/Ozone to Clean Membranes of Organic Impurity
I tried to clean samples from W615 using UV/ozone to cleanse the membranes of the organic impurities we have been seeing lately. I followed the UV/ozone protocol, with a stage temp of 25C and treatment time of 5 minutes. No change in the impurities were observed; I plan on trying to run it again for…