Porous hydrogel (IMAGE) RMIT University Caption One of the porous hydrogels used to grow probiotic bacteria in the bioreactor (image magnified about 650 times). Credit RMIT University Usage Restrictions Credit RMIT University License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.