Ring Patterns (image) Duke University Share Print E-Mail Caption Ring patterns form in a micro-colony of engineered bacteria. Credit Credit: Stephen Payne, Pratt School of Engineering, Duke. Usage Restrictions None Share Print E-Mail 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.