Bioreactors (IMAGE) Johns Hopkins Medicine Caption This is the SpinΩ bio-reactor (top) used to create the conditions for mini-brains to grow. At bottom is a commercially available 12-well lab dish. Credit Johns Hopkins Medicine Usage Restrictions None 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.