Here I am in the Biomaterials lab at Drexel, preparing a polymer to be made into a hydrogel.
Shown below are samples of the hydrogel scaffold that results from mixing the powdered form of the polymer with Phosphate Buffered Saline to make a solution which is molded in wells and then placed into a water bath. The result is a hydrogel about the size of a shirt button that exhibits some unusual behavior. Unlike Jello which melts when heated, these solutions become a hydrogel when heated to a temperature that matches the spinal cord environment. Check out my lesson plan for a further explanation.