User:Matt Hartings/Notebook/AU Biomaterials Design Lab/2015/09/02

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Objective

Prepping stock solutions for use in making AuNP fibers with lysozyme for other researchers to use.

Description

Target Concentrations

Based on the total reaction volume that the class will be using and the final concentrations that will be in each reaction volume, I have determined that the following HAuCl4·H2O and Lysozyme masses are appropriate for today's stock solutions.

Stock solutions

  1. HAuCl4·H2O
    1. 2.5 mM
    2. MW = 339.79 g/mol
    3. Volume = 50 mL
    4. 42.4 mg
  2. Lysozyme
    1. 20 μM
    2. MW = 14307 g/mol
    3. Volume = 100 mL
    4. 28.6 mg

Actual Concentrations

The actual masses are different from the target masses. The concentrations shown below reflect the actual concentrations made for the stock solutions. I used a 50 mL volumetric flask to make the gold stock solution and a 100 mL volumetric flask to make the protein solution. In each case I used HPLC-grade water.

Stock solutions

  1. HAuCl4·H2O
    1. 50.32 mg
    2. MW = 339.79 g/mol
    3. Volume = 50 mL
    4. 2.96 mM
  2. Lysozyme
    1. 30.65 mg
    2. MW = 14307 g/mol
    3. Volume = 100 mL
    4. 21.4 μM

Directions for making samples

Note: The final concentration of gold should be 0.25 mM and the final concentration of lysozyme should be 5.556 μM. This gives a Au:lysozyme ratio of 45, which should yield fibers.

  1. 1 mL samples
    1. Volume of gold stock: 84.4 μL
    2. Volume of protein stock: 259 μL
    3. Volume of water: 656 μL
  2. 5 mL samples
    1. Volume of gold stock: 422 μL
    2. Volume of protein stock: 1,297 μL
    3. Volume of water: 3,281 μL

I also made 1mL fiber samples

stock concentrations

  1. I used an old gold sample (2.96 mM)
  2. Lysozyme
    1. 4.60 mg lysozyme
    2. 5 mL volumetric
    3. 64.3 uM

reaction samples

  1. 86.4 uL protein
  2. 84.5 uL gold
  3. 829 uL water

I placed all of the samples in a rack and covered with aluminum foil and placed in the oven.

Data

  • Add data and results here...

Notes

This area is for any observations or conclusions that you would like to note.


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