HydrogelsHydrogelPolymersBiocompatible MaterialsPolyethylene GlycolsTissue EngineeringMaterials TestingCells, ImmobilizedMechanical PhenomenaBiomimetic MaterialsElastic ModulusTissue ScaffoldsRheologyAcrylamidesPolyhydroxyethyl MethacrylateAlginatesHyaluronic AcidMethacrylatesCross-Linking ReagentsPorosityHexuronic AcidsPolymerizationIridoid GlycosidesGelatinDelayed-Action PreparationsDrug Carriers