Comparison of Agents (IMAGE) Nanyang Technological University Caption Without real-time external light activation, the afterglow agent created by NTU scientists will continue to self-illuminate while the conventional fluorescent agent loses its shine immediately. The afterglow agent, which is undergoing more trials, has the potential to make it more convenient for scientists to look at test results. Credit NTU Singapore Usage Restrictions For this story only 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.