The company Protochips is making interesting microfluidic chips and systems for electron microscopy. See this page and this movie.
Note their use of integrated spacers as thin as 150 nm to create a flow channel between back-to-back membrane chips. This not only relates to our work with Vincent in Ottawa, perhaps it gives us new ideas for our flow systems?
The Bowman’s Capsule contains the Glomerulus, these are both part of a nephron of which the kidney has a gazillion. (The real estimate is the each kidney contains a million nephrons) Here are some pics to orient you. These give some idea why the Fissel group uses slits. The glomeruli are the main filtration device…
For the upcoming tests I have planned for H2 purification, I need a fixture to hold the pnc-Si membranes (Sepcon format) that is compatible with operation up to 500 C. No polymers are going to work. I describe the approach I’m working on below. I heard that Karl is developing a holder similar to what…
[latexpage] The solution to the problem of diffusion from a semi-infinite solution to a perfectly absorbing surface is found on page 32 of Crank’s classic text (The Mathematics of Diffusion): \begin{equation} \frac{C(y,t)}{C_o} = erf(\frac{y}{2\sqrt{Dt}}) \end{equation} Where D is the diffusion coefficient is the initial concentration everywhere in the bulk and erf is the error function….
During the recent visit of Greg Madeijski to our Institute of Biophysics, Imaging & Optical Science (IBIOS) here in Nottingham we had the opportunity to try imaging cultures of cells on several nanoporous membranes, including CytoVu’s and also the unsupported TEM grids without SiN. Here is a short summary of our adventures, along with some…
I submitted a proposal last week with Tom & I as co-PI’s to NSF’s Process Reaction Engineering division in CBET. Novel Catalytic Membrane Reactor Based on Ultra-thin Palladium Film Supported on Nano-structured Inorganic Membrane I’m attaching the intro. paragraph and a couple of the figures to give a general idea of what the proposal is…