There are many hydrogels used to control the stem cell differentiation, such as Hydrolytically degradable PEG hydrogels, Photodegradable PEG hydrogels, Enzymatically Degradable PEG hydrogels, etc. Please use some mathematical equations to derivative the hydrogel properties, like diffusion rate, oxygen transfer, etc. You can write any properties you want, but show it how to control the cell differentiation. And then write a discussion for the comparison, shows that which hydrogel provide a good control in the same condition.
4~5 pages with 1.5 space, time new roman 12 size, 2cm margin all around. No figure or picture include. Don't need introduction for hydrogel or cell differentiation. Just the mathematical equation and discussion.