User:Moira M. Esson/Notebook/CHEM-571/2013/10/22: Difference between revisions

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*The varying ratios will be used to determine the ideal concentrations for the preparation of fibers of unraveled proteins.
*The varying ratios will be used to determine the ideal concentrations for the preparation of fibers of unraveled proteins.
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==UV/vis==
==UV/vis==
*Absorbance of BSA-AuNPs was determined for future comparison of the activity of protein-AuNPs.
*Absorbance of BSA-AuNPs was determined for future comparison of the activity of protein-AuNPs.

Revision as of 06:57, 28 October 2013

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Objectives

  1. Determine the absorbance of BSA-AuNPs synthesized on 10/16/2013.
  2. Synthesize Pepsin-AuNPs and HRP-AuNPs for catalytic activity testing
  3. Determine the absorbance of all starting materials used for solution preparation (gold and HRP)


HRP-AuNP and Pepsin-AuNP


  • The general protocol for the synthesis of HRP-AuNP and Pepsin-AuNP follows the general protocol for the preparation of protein wrapped Au-NPs described on 08/28/2013.


Table 1. Preparation of Protein-AuNP solutions

Ratio Amount of gold added(mL) concentration HRP(M) concentration Pepsin(M) Volume HRP(mL) Volume Pepsin(mL) Volume Water HRP (mL) Volume Water Pepsin (mL)
30 0.496031746 8.33333E-06 8.33333E-06 2.723311547 2.653927813 1.780656707 1.850040441
50 0.496031746 0.000005 0.000005 1.633986928 1.592356688 2.869981326 2.911611566
70 0.496031746 3.57143E-06 3.57143E-06 1.16713352 1.137397634 3.336834734 3.36657062
90 0.496031746 2.77778E-06 2.77778E-06 0.907770516 0.884642604 3.596197738 3.61932565
110 0.496031746 2.27273E-06 2.27273E-06 0.742721331 0.723798494 3.761246923 3.780169759
130 0.496031746 1.92308E-06 1.92308E-06 0.628456511 0.61244488 3.875511743 3.891523374
150 0.496031746 1.66667E-06 1.66667E-06 0.544662309 0.530785563 3.959305945 3.973182691
170 0.496031746 1.47059E-06 1.47059E-06 0.480584391 0.468340202 4.023383863 4.035628052
190 0.496031746 1.31579E-06 1.31579E-06 0.42999656 0.419041234 4.073971694 4.08492702
210 0.496031746 1.19048E-06 1.19048E-06 0.389044507 0.379132545 4.114923747 4.124835709


  • The varying ratios will be used to determine the ideal concentrations for the preparation of fibers of unraveled proteins.


UV/vis

  • Absorbance of BSA-AuNPs was determined for future comparison of the activity of protein-AuNPs.


Figure 1. Absorbance spectra of a 1/10 dilution of BSA-AuNPs

  • Absorbance of all starting materials used for synthesis of AuNPs today for future comparison


Figure 2. Absorbance spectra of a 1/10 dilution of 2.52mM gold in water

Figure 3. Absorbance spectra of 1/2 dilution of 15.3μM HRP

Figure 4. Absorbance spectrum of 1/10 dilution of 15.6μM pepsin

  • No absorbance peak was observed for pepsin. This was expected due to the lack of color of the pepsin stock solution.

Notes

  • All of the solutions prepared had a yellowish tint


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