PROBLEM $2\mathrm{.}3$

You are building a scaffold for tissue engineering and are deciding on the appropri$-$

You are building a scaffold for tissue engineering and are deciding on the size. The technique that you are currently using creates an average pore size

of $250nm.$ There is another technique that would create pore sizes of $500nm,$ but it is

much more expensive. To see if it is worth increasing the pore size, you decide to calcu:

much more expensive. To see if it is worth incteasing the pore sifference in the diffusion coefficient of oxygen in the scaffold and media with

both types of pores. If the diffusion coefficient with the $500nm$ pores is at least $20\%$

larger than the coefficient for the $250nm$ pores for both gases, you will use the larger

pores. Based on your calculations should you use the scaffold with the larger pores?