Chapter $14$: Polymer Structures $(20\%)$

Qu$.4$ Epidermis is an Artificial skin for burned victims. It has a special keratinized layer responsible

for nutrition. To recreate something similar, scientists have to use different types of cells. When the

layer of the artificial skin is placed over the injured part of the body, it kick $-$ starts the body's own

regeneration process.

Figure v$.$ Lpruc.....

If the thickness of Epidermis is $1\mathrm{.}5mm$ and the pressure difference across the membrane is maintained

at $650Pa,$ what is the diffusion flux in $\frac{c{m}^{3}SPT}{c}{m}^2-s$ at $298K?$ Assume conditions of steady state

and permeability coefficient of $36{10}^{-4}(c{m}^{3}SPT)\frac{cm}{c}{m}^2-s-Pa.$