Figure 2 : Photographs of freshly prepared native hydrogels of the final gel formulations: 3 wt%
alginate, 2 wt% agar, 2 wt% agarose, 10 wt% PAA and 15 wt% PVA (from left to right).

Seidlitz et al.Journal of Pharmaceutical Technology and Drug Research  2013 2:19DOI : 10.7243/2050-120X-2-19