UED conformers (IMAGE) DOE/SLAC National Accelerator Laboratory Caption With SLAC’s ultrafast “electron camera,” researchers were able to confirm a half-century-old set of rules predicting the outcome of ring-opening reactions, demonstrating that the molecules open exclusively in the way predicted by the rules. The reaction pathway is illustrated in this graphic representation. Credit Greg Stewart/SLAC National Accelerator Laboratory Usage Restrictions With proper credit License Original 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.