User:Madeleine Y. Bee/Notebook/Single Molecule Fluorescence/2013/07/08

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July 8, 2013

Notes from Meeting

  • Since we're seeing some noise from just PBS on the FCS: make new PBS and run, parse out 10mL samples to avoid contaimination
  • Sonicate or centrifuge green fluorescent beads before running to prevent aggregation while measurements are being taken
  • Go up to 500pM for Oligo D samples (and lower concentrations)
  • Use a high, constant concentration of DNA with lower, decreasing concentration of MB
  • Check for consistent diffusion times between samples run on different days
    • Different diffusion times indicate background is something other than unbound DNA
  • Look up AuNP/DNA/MB fluorescent data and run samples/make and run new samples
  • Look in literature for ways to calculate silica shell thickness without TEM results

FCS Sample Prep

  • Green fluorescent beads
    • 10000x diluted
    • Run 3x, 90s
  • Oligo D
    • 150pM
    • 125pM
    • 100pM
    • Run 3x, 500s
  • DNA/MB: DNA held at a constant concentration to isolate background from DNA
    • 600/500
    • 600/400
    • 600/300
    • 600/200
    • 600/100
    • Run 3x, 500s