March 20-March 26 2018

This week the Power Puff Girls worked to accomplish testing and redesign of the recirculation apparatus. The testing was done for three rounds using 5 concentrations of approximately .17g/L. the results showed an average yield of 65.11%. This value accounts for the mass of nanoparticles that collected on the magnet and were removed from the system. Along with this, we had to consider the control. The control test was run my flowing the same volume through the system without any magnetic field. After the total 5L was run through the system, the number of nanoparticles left in the tubing and bags was then flushed out of the system and weighed. The percent of nanoparticles left in the system was 31.39%. This percentage is large and is mostly due to the nanoparticles attaching to the walls of the bag and tubing. The percent needs to be accounted for when considering the results from testing if the amount left in the system is approximately 30%, then we would assume that the number of nanoparticles that escaped the system and entered the body would only be about 5%. However looking at our results where we harvest about 65% of the nanoparticles we used we can say that 35% of the nanoparticles goes into the body, but the nanoparticles which remains on the wall of the bag and the tubing themselves is much because the water we collect looks very clear in the end. the 5%  value would be within the safe limit for the number of nanoparticles that can be within a patient without causing harm. Future testing will be done with 8 times .133 g/pint concentration of nanoparticles. The same method will be used and a new control will be conducted.

Along with the testing, the 3D part was completed for the recirculation apparatus and is shown below. Future redesign will be conducted this week as the box will be made mobile and smaller in size.

Figure 1: A photograph of the 3D printed recirculation device.