Fig. 2: Mass of polymer released by hydrogel beads after incubation.
From: Immobilization of active ammonia-oxidizing archaea in hydrogel beads

Concentration of polymer released in the liquid phase for small (Dark gray) and large beads (Light gray) cross-linked with barium (Ba2+), calcium (Ca2+), blue light (Sbq), and either sulfate 6% (SO42− 6%) or 10% (SO42− 10%) after 5 weeks of incubation. Error bars represent standard deviations.