Goals for the Week

Last week, had experiment with no current at all
- Hypothesized that cells were dead?
- Run test with 1 day vs. 2 day old Shewie to determine if there is an effect

Monday: July 21, 2008

started mtrB and wt cultures
- mtrB culture to be used as 2-day culture on Thursday
troubleshoot LabVIEW
- Resistances were measured to be different as expected in the past experiment
- Some as low as 160 ohms
- Perhaps the resistance of the chambers are less than we expected?

Started another mtrB culture
- To be used as 1 day culture in experiment on Thursday
LabVIEW
- Determined that resistance should be measured before connecting to the fuel cells
- Resistance of chambers is the same as what we measured initially

mtrB 1 day vs. 2 day experiment
- 6 chambers
  - 3 chambers with 1-day old mtrB
  - 3 chambers with 2-day old mtrB
  - Injected lactate after the initial current spike came down

mtrB: Overnight versus 2 Day Liquid Cultures

What we did:

-Ran 1-day old mtrB versus 2-day old mtrB

Results:

-The shapes of the curves were all very similar.

-Overnight cultures had slightly higher current production than 2-day old cultures.