Klapperich Lab:Notebook/Lab Meeting Notes/2009/05/07

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7 May 2009 Lab Meeting

† Announcements

  • New lab meeting time T 10a-12pm room 705 starting 5/12/2009


† Flu R01

  • Progress report done.
  • sample collection done.
    .
  • Updates?
  • Three flu fixtures completed today at the machine shop for 400$, another one ordered for general purpose use (Jane and Jaephil)


† SEPSIS Project

  • Revision in process due 5/20


†RNA project

  • Jeff visiting week of May 25th


† COBRA

  • Integration with the glass slide.
  • new air channel design sent to machine shop
  • new fluid channel made in PDMS
  • making the polyurethane mold had proven challenging as it sticks to the plastic fixture, tried mold release but didn't help
  • new cutting plotter carrier sheet ordered
  • new air channel mold did not cure well and the PDMS made from it was leaking. need to do it again, mold material ordered.


  • Substrates (JZ)
    • Let's get this to a point where we can publish and move on....JZ and CMK to discuss.

- Making substrate in microwewlls? (motivation? need to implement valves)
- Co-evaporate colloids? (the morphology won't be uniform or consistent each time, signal analysis system non-existent)
- Sol-gel on Teflon? (can serve to study basic material science only)

  • Colloid experiment

- Do Rhodamine. Leaked. Need to try again.
- Found the problem. Liquid and air channel widths reversed. Will make new chip and try again.
-Need a size specific positive control. PS beads? charged?

    • 1um unmodified, undiluted PS beads give distinctive spectrum on Ranjith's substrate
    • try coated PS beads.


† Virus concentration

  • ATCC flu virus grew and harvested
  • Plaque assay of harvested virus in progress: learning from Brendan, will try if enough cells
  • Concentrator chip design underway


† Valve Array/Valve building - done.

  • Who is in charge of this now that the SP students are gone? Alex?

† Fraunhofer: LOAC

  • Paper in revision Yeah!
  • Bonding meeting with MIT folks - Alex left some samples with them. Updates?


† Biointerfaces group

  • Final draft with collaborators.
  • designing herringbone groove for better trapping (Mask writer down until next Tuesday)
  • investigate the stability under different Peclet numbers (ratio of hydrodynamic force and Brownian force).


† CIMIT- Colson Grant

  • IRB still in revision.


† PCR

  • Cathie read and gave back PCR 1 paper to QQ and MCK
  • Qingqing has written the introduction
  • repeated test of the PCR efficiency for different designs of channel.
  • test PCR efficiency using smaller DNA size (63bp product).
  • analyze PCR product for different temperature using bioanalyzer.
  • getting statistical data for the activation energy from 50 particle simulation (Fig. 5-7)
  • Mincheol has written the introduction, results and discussion, and conclusion.
  • will develop large scale particle modeling in full PCR model (30 PCR cycles or 20 PCR cycles)


† RCA/HDA

  • Giving up on white paper. Think about other grant outlets.
  • Preliminary no-valve design for 25 microliters.
  • 20 more test chips to Sonali (AACC poster).
  • Sonali try to do 10 microliters in the tube * Updates?
  • Jane is working on passive valve characterization: threshold pressure not related to cantilever length or bonding time, try hole size next


† Senior project

  • Megan
  • HDA on chip. Make simple chip that mixes two things for HDA. Move chip to heater, do HDA demonstration = home run.
  • Plasma helped bonding.
  • EHS wants MSDS stuff.


† Silica Optimization (Lambda):

  • Run single PCR product from QQ or Sonali the test with the bioanalyzer



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