Why does my GelMA hydrogel liquefy when adding DMEM?

Hi all, I am making a PBS-based GelMA hydrogel, 10% (w/v) monomer + 0.5% photoinitiator with suspended cells. Once I cure it in UV and add DMEM for the incubator, it liquefies and stays a liquid...

04 March 2016 9,646 9 View